BACKGROUND
[0001] The following relates generally to wireless communications, and more specifically
to determining transmission configurations for resource block groups and precoding
resource block groups.
[0002] Wireless communications systems are widely deployed to provide various types of communication
content such as voice, video, packet data, messaging, broadcast, and so on. These
systems may be capable of supporting communication with multiple users by sharing
the available system resources (e.g., time, frequency, and power). Examples of such
multiple-access systems include fourth generation (4G) systems such as Long Term Evolution
(LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation
(5G) systems which may be referred to as New Radio (NR) systems. These systems may
employ technologies such as code division multiple access (CDMA), time division multiple
access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division
multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency
division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system
may include a number of base stations or network access nodes, each simultaneously
supporting communication for multiple communication devices, which may be otherwise
known as user equipment (UE).
[0003] In some wireless communications systems, a UE or a base station may determine allocations
of resource structures in particular frequencies or frequency bands. In some cases,
the resource structures may be referred to as resource blocks. The UE or base station
may determine subsets of contiguous resource blocks, which may be referred to as bandwidth
parts, to identify where certain information may be transmitted. In some cases, when
identifying resource blocks of a bandwidth part, the device may identify conflicting
information, which may cause transmission and/or reception errors.
[0004] 3GPP draft R1-1800856 relates to maintenance for PRB bundling for DL.
SUMMARY
[0005] The described techniques relate to improved methods, systems, devices, and apparatuses
that support determining transmission configurations for resource block groups and
precoding resource block groups. Generally, the described techniques provide processes
for avoiding conditions which may cause transmission or reception errors due to conflicting
or incorrect resource block characteristics.
[0006] The described techniques may be similarly utilized to avoid potential errors based
on precoding resource block groups.
[0007] A method of wireless communications is described. The invention is defined by the
appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008]
FIG. 1 illustrates an example of a system for wireless communications that supports
determining transmission configurations in accordance with aspects of the present
disclosure.
FIG. 2 illustrates an example of a system for wireless communications that supports
determining transmission configurations for resource block groups and precoding groups
in accordance with aspects of the present disclosure.
FIG. 3 illustrates an example of a process flow diagram that supports determining
transmission configurations for resource block groups and precoding groups in accordance
with aspects of the present disclosure.
FIG. 4 illustrates an example of a process flow that supports determining transmission
configurations for resource block groups and precoding groups in accordance with aspects
of the present disclosure.
FIG. 5 illustrates an example of a process flow diagram that supports determining
transmission configurations for resource block groups and precoding groups in accordance
with aspects of the present disclosure.
FIGs. 6 and 7 show block diagrams of devices that support determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure.
FIG. 8 shows a block diagram of a communications manager that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure.
FIG. 9 shows a diagram of a system including a user equipment (UE) that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure.
FIG. 10 shows a diagram of a system including a base station that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure.
FIGs. 11 and 12 show block diagrams of devices that support determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure.
FIG. 13 shows a block diagram of a communications manager that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure.
FIG. 14 shows a diagram of a system including a device that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure.
FIGs. 15 through 20 show flowcharts illustrating methods that support determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure.
DETAILED DESCRIPTION
[0009] In some wireless communication radio access technologies, one or more devices (e.g.,
user equipments (UEs) and/or base stations) may allocate or determine various locations
and sizes of resource structures within a frequency bandwidth, such as a carrier bandwidth.
For example, a base station may allocate where various resource blocks (e.g., physical
resource blocks (PRBs), common resource blocks (CRBs), virtual resource blocks (VRBs))
are located in a carrier bandwidth. In some cases, these resource block locations,
sizes, and groupings may be allocated and determined with reference to a carrier bandwidth
part (BWP) and a point in the carrier bandwidth (e.g., point A, where subcarrier 0
in the carrier bandwidth is centered). A bandwidth part may be a subset of contiguous
common resource blocks defined within the carrier bandwidth.
[0010] Various techniques may be utilized to determine resource block allocations within
a carrier bandwidth. In some cases, a type 0 resource allocation (e.g., for more granular
resource allocations) may refer to a bitmap including a bit for each resource block
group. A UE may receive the type 0 resource allocation (e.g., a bitmap indicated via
downlink control information), and may identify which resource block groups are included
in a downlink grant based on a resource block group (RBG) configuration (e.g., a configuration
or indexing of RBGs) and 1's indicated by the bitmap. A type 1 resource allocation
may refer to a continuous resource allocation, indicated by a starting resource block
or resource block group and an ending resource block or resource block groups. In
a type 0 allocation, a resource block group size of a first resource block group and
a last resource block group in a bandwidth part may be determined using a designated
formula. However, in some cases, for example when a bandwidth part includes a single
resource block group, the designated formulas may yield different resource block group
sizes for the first and last resource block groups, even though the first and last
resource block groups are the same resource block groups. These conflicting results
may cause errors in resource allocation by a base station and resource identification
by a UE.
[0011] Further, similar techniques may be utilized to identify precoding resource block
groups within various bandwidth parts in a carrier bandwidth. A UE may be configured
to identify the size of the first and last precoding resource block group of a bandwidth
part. If the bandwidth part includes a single precoding resource block group, then
a UE may identify different sizes for the first and last precoding resource block
groups, even though first and last precoding resource block group is the same precoding
resource block group. These conflicting results may also cause errors in resource
allocation by a base station and resource identification by a UE.
[0012] Various techniques described herein may be utilized to avoid these potential errors.
In one example technique, a base station may identify a particular resource allocation
(e.g., type 1 allocation) in downlink control information transmitted to a UE such
that the described errors may be avoided. The base station may identify the particular
resource allocation upon determining that an identified transmission configuration
yields a bandwidth part size less than or equal to a bandwidth part size threshold
and further based on a resource block group size yielded by the transmission configuration.
Thus, rather than allocating resources according to a first allocation type, which
may potentially result in the described errors, the base station instructs a UE to
utilize a resource allocation which avoids the possibility of such errors. In other
examples, the UE and base station may be configured to set a resource block group
size equal to the bandwidth part size when the UE and base station determine that
certain conditions present in a transmission configuration. These techniques may be
similarly utilized to avoid the errors caused in allocation of precoding resource
block groups.
[0013] Aspects of the disclosure are initially described in the context of a wireless communications
system. Aspects of the disclosure are further described in the context of a wireless
communications system illustrating communications between a base station and a UE,
a process flow diagram illustrating a base station designated resource allocation
type, a process flow diagram illustrating a resource block group size designation
based on a calculation, and a process flow diagram illustrating a resource block group
size designation based on a comparison. Aspects of the disclosure are further illustrated
by and described with reference to apparatus diagrams, system diagrams, and flowcharts
that relate to determining transmission configurations.
[0014] FIG. 1 illustrates an example of a wireless communications system 100 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. The wireless communications
system 100 includes base stations 105, UEs 115, and a core network 130. In some examples,
the wireless communications system 100 may be a Long Term Evolution (LTE) network,
an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network.
In some cases, wireless communications system 100 may support enhanced broadband communications,
ultra-reliable (e.g., mission critical) communications, low latency communications,
or communications with low-cost and low-complexity devices.
[0015] Base stations 105 may wirelessly communicate with UEs 115 via one or more base station
antennas. Base stations 105 described herein may include or may be referred to by
those skilled in the art as a base transceiver station, a radio base station, an access
point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or giga-NodeB
(either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or some
other suitable terminology. Wireless communications system 100 may include base stations
105 of different types (e.g., macro or small cell base stations). The UEs 115 described
herein may be able to communicate with various types of base stations 105 and network
equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the
like.
[0016] Each base station 105 may be associated with a particular geographic coverage area
110 in which communications with various UEs 115 is supported. Each base station 105
may provide communication coverage for a respective geographic coverage area 110 via
communication links 125, and communication links 125 between a base station 105 and
a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless
communications system 100 may include uplink transmissions from a UE 115 to a base
station 105, or downlink transmissions from a base station 105 to a UE 115. Downlink
transmissions may also be called forward link transmissions while uplink transmissions
may also be called reverse link transmissions.
[0017] The geographic coverage area 110 for a base station 105 may be divided into sectors
making up a portion of the geographic coverage area 110, and each sector may be associated
with a cell. For example, each base station 105 may provide communication coverage
for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations
thereof. In some examples, a base station 105 may be movable and therefore provide
communication coverage for a moving geographic coverage area 110. In some examples,
different geographic coverage areas 110 associated with different technologies may
overlap, and overlapping geographic coverage areas 110 associated with different technologies
may be supported by the same base station 105 or by different base stations 105. The
wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A
Pro or NR network in which different types of base stations 105 provide coverage for
various geographic coverage areas 110.
[0018] The term "cell" refers to a logical communication entity used for communication with
a base station 105 (e.g., over a carrier), and may be associated with an identifier
for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual
cell identifier (VCID)) operating via the same or a different carrier. In some examples,
a carrier may support multiple cells, and different cells may be configured according
to different protocol types (e.g., machine-type communication (MTC), narrowband Internet-of-Things
(NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for
different types of devices. In some cases, the term "cell" may refer to a portion
of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.
[0019] UEs 115 may be dispersed throughout the wireless communications system 100, and each
UE 115 may be stationary or mobile. A UE 115 may also be referred to as a mobile device,
a wireless device, a remote device, a handheld device, or a subscriber device, or
some other suitable terminology, where the "device" may also be referred to as a unit,
a station, a terminal, or a client. A UE 115 may also be a personal electronic device
such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a
laptop computer, or a personal computer. In some examples, a UE 115 may also refer
to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet
of Everything (IoE) device, or an MTC device, or the like, which may be implemented
in various articles such as appliances, vehicles, meters, or the like.
[0020] Some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices,
and may provide for automated communication between machines (e.g., via Machine-to-Machine
(M2M) communication). M2M communication or MTC may refer to data communication technologies
that allow devices to communicate with one another or a base station 105 without human
intervention. In some examples, M2M communication or MTC may include communications
from devices that integrate sensors or meters to measure or capture information and
relay that information to a central server or application program that can make use
of the information or present the information to humans interacting with the program
or application. Some UEs 115 may be designed to collect information or enable automated
behavior of machines. Examples of applications for MTC devices include smart metering,
inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring,
wildlife monitoring, weather and geological event monitoring, fleet management and
tracking, remote security sensing, physical access control, and transaction-based
business charging.
[0021] Some UEs 115 may be configured to employ operating modes that reduce power consumption,
such as half-duplex communications (e.g., a mode that supports one-way communication
via transmission or reception, but not transmission and reception simultaneously).
In some examples, half-duplex communications may be performed at a reduced peak rate.
Other power conservation techniques for UEs 115 include entering a power saving "deep
sleep" mode when not engaging in active communications, or operating over a limited
bandwidth (e.g., according to narrowband communications). In some cases, UEs 115 may
be designed to support critical functions (e.g., mission critical functions), and
a wireless communications system 100 may be configured to provide ultra-reliable communications
for these functions.
[0022] In some cases, a UE 115 may also be able to communicate directly with other UEs 115
(e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol). One or more
of a group of UEs 115 utilizing D2D communications may be within the geographic coverage
area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic
coverage area 110 of a base station 105, or be otherwise unable to receive transmissions
from a base station 105. In some cases, groups of UEs 115 communicating via D2D communications
may utilize a one-to-many (1:M) system in which each UE 115 transmits to every other
UE 115 in the group. In some cases, a base station 105 facilitates the scheduling
of resources for D2D communications. In other cases, D2D communications are carried
out between UEs 115 without the involvement of a base station 105.
[0023] Base stations 105 may communicate with the core network 130 and with one another.
For example, base stations 105 may interface with the core network 130 through backhaul
links 132 (e.g., via an S1, N2, N3, or other interface). Base stations 105 may communicate
with one another over backhaul links 134 (e.g., via an X2, Xn, or other interface)
either directly (e.g., directly between base stations 105) or indirectly (e.g., via
core network 130).
[0024] The core network 130 may provide user authentication, access authorization, tracking,
Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
The core network 130 may be an evolved packet core (EPC), which may include at least
one mobility management entity (MME), at least one serving gateway (S-GW), and at
least one Packet Data Network (PDN) gateway (P-GW). The MME may manage non-access
stratum (e.g., control plane) functions such as mobility, authentication, and bearer
management for UEs 115 served by base stations 105 associated with the EPC. User IP
packets may be transferred through the S-GW, which itself may be connected to the
P-GW. The P-GW may provide IP address allocation as well as other functions. The P-GW
may be connected to the network operators IP services. The operators IP services may
include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or
a Packet-Switched (PS) Streaming Service.
[0025] At least some of the network devices, such as a base station 105, may include subcomponents
such as an access network entity, which may be an example of an access node controller
(ANC). Each access network entity may communicate with UEs 115 through a number of
other access network transmission entities, which may be referred to as a radio head,
a smart radio head, or a transmission/reception point (TRP). In some configurations,
various functions of each access network entity or base station 105 may be distributed
across various network devices (e.g., radio heads and access network controllers)
or consolidated into a single network device (e.g., a base station 105).
[0026] Wireless communications system 100 may operate using one or more frequency bands,
typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the
region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or
decimeter band, since the wavelengths range from approximately one decimeter to one
meter in length. UHF waves may be blocked or redirected by buildings and environmental
features. However, the waves may penetrate structures sufficiently for a macro cell
to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated
with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission
using the smaller frequencies and longer waves of the high frequency (HF) or very
high frequency (VHF) portion of the spectrum below 300 MHz.
[0027] Wireless communications system 100 may also operate in a super high frequency (SHF)
region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band.
The SHF region includes bands such as the 5 GHz industrial, scientific, and medical
(ISM) bands, which may be used opportunistically by devices that may be capable of
tolerating interference from other users.
[0028] Wireless communications system 100 may also operate in an extremely high frequency
(EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter
band. In some examples, wireless communications system 100 may support millimeter
wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas
of the respective devices may be even smaller and more closely spaced than UHF antennas.
In some cases, this may facilitate use of antenna arrays within a UE 115. However,
the propagation of EHF transmissions may be subject to even greater atmospheric attenuation
and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be
employed across transmissions that use one or more different frequency regions, and
designated use of bands across these frequency regions may differ by country or regulating
body.
[0029] In some cases, wireless communications system 100 may utilize both licensed and unlicensed
radio frequency spectrum bands. For example, wireless communications system 100 may
employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology,
or NR technology in an unlicensed band such as the 5 GHz ISM band. When operating
in unlicensed radio frequency spectrum bands, wireless devices such as base stations
105 and UEs 115 may employ listen-before-talk (LBT) procedures to ensure a frequency
channel is clear before transmitting data. In some cases, operations in unlicensed
bands may be based on a carrier aggregation configuration in conjunction with component
carriers operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum
may include downlink transmissions, uplink transmissions, peer-to-peer transmissions,
or a combination of these. Duplexing in unlicensed spectrum may be based on frequency
division duplexing (FDD), time division duplexing (TDD), or a combination of both.
[0030] In some examples, base station 105 or UE 115 may be equipped with multiple antennas,
which may be used to employ techniques such as transmit diversity, receive diversity,
multiple-input multiple-output (MIMO) communications, or beamforming. For example,
wireless communications system 100 may use a transmission scheme between a transmitting
device (e.g., a base station 105) and a receiving device (e.g., a UE 115), where the
transmitting device is equipped with multiple antennas and the receiving device is
equipped with one or more antennas. MIMO communications may employ multipath signal
propagation to increase the spectral efficiency by transmitting or receiving multiple
signals via different spatial layers, which may be referred to as spatial multiplexing.
The multiple signals may, for example, be transmitted by the transmitting device via
different antennas or different combinations of antennas. Likewise, the multiple signals
may be received by the receiving device via different antennas or different combinations
of antennas. Each of the multiple signals may be referred to as a separate spatial
stream, and may carry bits associated with the same data stream (e.g., the same codeword)
or different data streams. Different spatial layers may be associated with different
antenna ports used for channel measurement and reporting. MIMO techniques include
single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same
receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are
transmitted to multiple devices.
[0031] Beamforming, which may also be referred to as spatial filtering, directional transmission,
or directional reception, is a signal processing technique that may be used at a transmitting
device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer
an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between
the transmitting device and the receiving device. Beamforming may be achieved by combining
the signals communicated via antenna elements of an antenna array such that signals
propagating at particular orientations with respect to an antenna array experience
constructive interference while others experience destructive interference. The adjustment
of signals communicated via the antenna elements may include a transmitting device
or a receiving device applying certain amplitude and phase offsets to signals carried
via each of the antenna elements associated with the device. The adjustments associated
with each of the antenna elements may be defined by a beamforming weight set associated
with a particular orientation (e.g., with respect to the antenna array of the transmitting
device or receiving device, or with respect to some other orientation).
[0032] In one example, a base station 105 may use multiple antennas or antenna arrays to
conduct beamforming operations for directional communications with a UE 115. For instance,
some signals (e.g., synchronization signals, reference signals, beam selection signals,
or other control signals) may be transmitted by a base station 105 multiple times
in different directions, which may include a signal being transmitted according to
different beamforming weight sets associated with different directions of transmission.
Transmissions in different beam directions may be used to identify (e.g., by the base
station 105 or a receiving device, such as a UE 115) a beam direction for subsequent
transmission and/or reception by the base station 105.
[0033] Some signals, such as data signals associated with a particular receiving device,
may be transmitted by a base station 105 in a single beam direction (e.g., a direction
associated with the receiving device, such as a UE 115). In some examples, the beam
direction associated with transmissions along a single beam direction may be determined
based at least in in part on a signal that was transmitted in different beam directions.
For example, a UE 115 may receive one or more of the signals transmitted by the base
station 105 in different directions, and the UE 115 may report to the base station
105 an indication of the signal it received with a highest signal quality, or an otherwise
acceptable signal quality. Although these techniques are described with reference
to signals transmitted in one or more directions by a base station 105, a UE 115 may
employ similar techniques for transmitting signals multiple times in different directions
(e.g., for identifying a beam direction for subsequent transmission or reception by
the UE 115), or transmitting a signal in a single direction (e.g., for transmitting
data to a receiving device).
[0034] A receiving device (e.g., a UE 115, which may be an example of a mmW receiving device)
may try multiple receive beams when receiving various signals from the base station
105, such as synchronization signals, reference signals, beam selection signals, or
other control signals. For example, a receiving device may try multiple receive directions
by receiving via different antenna subarrays, by processing received signals according
to different antenna subarrays, by receiving according to different receive beamforming
weight sets applied to signals received at a plurality of antenna elements of an antenna
array, or by processing received signals according to different receive beamforming
weight sets applied to signals received at a plurality of antenna elements of an antenna
array, any of which may be referred to as "listening" according to different receive
beams or receive directions. In some examples, a receiving device may use a single
receive beam to receive along a single beam direction (e.g., when receiving a data
signal). The single receive beam may be aligned in a beam direction determined based
at least in part on listening according to different receive beam directions (e.g.,
a beam direction determined to have a highest signal strength, highest signal-to-noise
ratio, or otherwise acceptable signal quality based at least in part on listening
according to multiple beam directions).
[0035] In some cases, the antennas of a base station 105 or UE 115 may be located within
one or more antenna arrays, which may support MIMO operations, or transmit or receive
beamforming. For example, one or more base station antennas or antenna arrays may
be co-located at an antenna assembly, such as an antenna tower. In some cases, antennas
or antenna arrays associated with a base station 105 may be located in diverse geographic
locations. A base station 105 may have an antenna array with a number of rows and
columns of antenna ports that the base station 105 may use to support beamforming
of communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays
that may support various MIMO or beamforming operations.
[0036] In some cases, wireless communications system 100 may be a packet-based network that
operate according to a layered protocol stack. In the user plane, communications at
the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. A Radio
Link Control (RLC) layer may perform packet segmentation and reassembly to communicate
over logical channels. A Medium Access Control (MAC) layer may perform priority handling
and multiplexing of logical channels into transport channels. The MAC layer may also
use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer
to improve link efficiency. In the control plane, the Radio Resource Control (RRC)
protocol layer may provide establishment, configuration, and maintenance of an RRC
connection between a UE 115 and a base station 105 or core network 130 supporting
radio bearers for user plane data. At the Physical layer, transport channels may be
mapped to physical channels.
[0037] In some cases, UEs 115 and base stations 105 may support retransmissions of data
to increase the likelihood that data is received successfully. HARQ feedback is one
technique of increasing the likelihood that data is received correctly over a communication
link 125. HARQ may include a combination of error detection (e.g., using a cyclic
redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g.,
automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in poor
radio conditions (e.g., signal-to-noise conditions). In some cases, a wireless device
may support same-slot HARQ feedback, where the device may provide HARQ feedback in
a specific slot for data received in a previous symbol in the slot. In other cases,
the device may provide HARQ feedback in a subsequent slot, or according to some other
time interval.
[0038] Time intervals in LTE or NR may be expressed in multiples of a basic time unit, which
may, for example, refer to a sampling period of T
s = 1/30,720,000 seconds. Time intervals of a communications resource may be organized
according to radio frames each having a duration of 10 milliseconds (ms), where the
frame period may be expressed as Tf = 307,200 T
s. The radio frames may be identified by a system frame number (SFN) ranging from 0
to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe
may have a duration of 1 ms. A subframe may be further divided into 2 slots each having
a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g.,
depending on the length of the cyclic prefix prepended to each symbol period). Excluding
the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases,
a subframe may be the smallest scheduling unit of the wireless communications system
100, and may be referred to as a transmission time interval (TTI). In other cases,
a smallest scheduling unit of the wireless communications system 100 may be shorter
than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs
(sTTIs) or in selected component carriers using sTTIs).
[0039] In some wireless communications systems, a slot may further be divided into multiple
mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot
or a mini-slot may be the smallest unit of scheduling. Each symbol may vary in duration
depending on the subcarrier spacing or frequency band of operation, for example. Further,
some wireless communications systems may implement slot aggregation in which multiple
slots or mini-slots are aggregated together and used for communication between a UE
115 and a base station 105.
[0040] The term "carrier" refers to a set of radio frequency spectrum resources having a
defined physical layer structure for supporting communications over a communication
link 125. For example, a carrier of a communication link 125 may include a portion
of a radio frequency spectrum band that is operated according to physical layer channels
for a given radio access technology. Each physical layer channel may carry user data,
control information, or other signaling. A carrier may be associated with a pre-defined
frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial
radio access (E-UTRA) absolute radio frequency channel number (EARFCN)), and may be
positioned according to a channel raster for discovery by UEs 115. Carriers may be
downlink or uplink (e.g., in an FDD mode), or be configured to carry downlink and
uplink communications (e.g., in a TDD mode). In some examples, signal waveforms transmitted
over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier
modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM)
or discrete Fourier transform spread OFDM (DFT-S-OFDM)).
[0041] The organizational structure of the carriers may be different for different radio
access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR). For example, communications
over a carrier may be organized according to TTIs or slots, each of which may include
user data as well as control information or signaling to support decoding the user
data. A carrier may also include dedicated acquisition signaling (e.g., synchronization
signals or system information, etc.) and control signaling that coordinates operation
for the carrier. In some examples (e.g., in a carrier aggregation configuration),
a carrier may also have acquisition signaling or control signaling that coordinates
operations for other carriers.
[0042] Physical channels may be multiplexed on a carrier according to various techniques.
A physical control channel and a physical data channel may be multiplexed on a downlink
carrier, for example, using time division multiplexing (TDM) techniques, frequency
division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples,
control information transmitted in a physical control channel may be distributed between
different control regions in a cascaded manner (e.g., between a common control region
or common search space and one or more UE-specific control regions or UE-specific
search spaces).
[0043] A carrier may be associated with a particular bandwidth of the radio frequency spectrum,
and in some examples, the carrier bandwidth may be referred to as a "system bandwidth"
of the carrier or the wireless communications system 100. For example, the carrier
bandwidth may be one of a number of predetermined bandwidths for carriers of a particular
radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples,
each served UE 115 may be configured for operating over portions or all of the carrier
bandwidth. In other examples, some UEs 115 may be configured for operation using a
narrowband protocol type that is associated with a predefined portion or range (e.g.,
set of subcarriers or resource blocks (RBs)) within a carrier (e.g., "in-band" deployment
of a narrowband protocol type).
[0044] In a system employing MCM techniques, a resource element may consist of one symbol
period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol
period and subcarrier spacing are inversely related. The number of bits carried by
each resource element may depend on the modulation scheme (e.g., the order of the
modulation scheme). Thus, the more resource elements that a UE 115 receives and the
higher the order of the modulation scheme, the higher the data rate may be for the
UE 115. In MIMO systems, a wireless communications resource may refer to a combination
of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g.,
spatial layers), and the use of multiple spatial layers may further increase the data
rate for communications with a UE 115.
[0045] Devices of the wireless communications system 100 (e.g., base stations 105 or UEs
115) may have a hardware configuration that supports communications over a particular
carrier bandwidth, or may be configurable to support communications over one of a
set of carrier bandwidths. In some examples, the wireless communications system 100
may include base stations 105 and/or UEs 115 that support simultaneous communications
via carriers associated with more than one different carrier bandwidth.
[0046] Wireless communications system 100 may support communication with a UE 115 on multiple
cells or carriers, a feature which may be referred to as carrier aggregation or multi-carrier
operation. A UE 115 may be configured with multiple downlink component carriers and
one or more uplink component carriers according to a carrier aggregation configuration.
Carrier aggregation may be used with both FDD and TDD component carriers.
[0047] In some cases, wireless communications system 100 may utilize enhanced component
carriers (eCCs). An eCC may be characterized by one or more features including wider
carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration,
or modified control channel configuration. In some cases, an eCC may be associated
with a carrier aggregation configuration or a dual connectivity configuration (e.g.,
when multiple serving cells have a suboptimal or non-ideal backhaul link). An eCC
may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where
more than one operator is allowed to use the spectrum). An eCC characterized by wide
carrier bandwidth may include one or more segments that may be utilized by UEs 115
that are not capable of monitoring the whole carrier bandwidth or are otherwise configured
to use a limited carrier bandwidth (e.g., to conserve power).
[0048] In some cases, an eCC may utilize a different symbol duration than other component
carriers, which may include use of a reduced symbol duration as compared with symbol
durations of the other component carriers. A shorter symbol duration may be associated
with increased spacing between adjacent subcarriers. A device, such as a UE 115 or
base station 105, utilizing eCCs may transmit wideband signals (e.g., according to
frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc.) at reduced symbol
durations (e.g., 16.67 microseconds). A TTI in eCC may consist of one or multiple
symbol periods. In some cases, the TTI duration (that is, the number of symbol periods
in a TTI) may be variable.
[0049] Wireless communications system 100 may be an NR system that may utilize any combination
of licensed, shared, and unlicensed spectrum bands, among others. The flexibility
of eCC symbol duration and subcarrier spacing may allow for the use of eCC across
multiple spectrums. In some examples, NR shared spectrum may increase spectrum utilization
and spectral efficiency, specifically through dynamic vertical (e.g., across the frequency
domain) and horizontal (e.g., across the time domain) sharing of resources.
[0050] In some wireless communication radio access technologies, a base station 105 may
allocate different resource structures within a frequency bandwidth, such as a carrier
bandwidth. In some cases, allocation of resource structures within a frequency bandwidth
may be referred to as identification of a transmission configuration. In some cases,
identification of a transmission configuration includes identifying a resource allocation
type based on carrier bandwidth, operating conditions, UE capability, etc. In some
examples, the resource allocation type may be indicated by higher layer signaling,
and in some cases, base station 105 may transmit downlink signaling (e.g., downlink
control information (DCI), RRC signaling etc.) that includes a grant indicating a
resource allocation for a downlink or uplink transmission. DCI may include information
regarding downlink scheduling assignments, uplink resource grants, transmission scheme,
uplink power control, HARQ information, a MCS, and other information. The size and
format of the DCI message may differ depending on the type and amount of information
that is carried by the DCI, as well as factors such as bandwidth, the number of antenna
ports, and duplexing mode.
[0051] DCI may indicate a resource allocation (e.g., a portion or range, such as a set of
subcarriers, RBs, or RBGs) within a carrier in various ways. A type 0 resource allocation
(e.g., for more granular resource allocations) may refer to a bitmap including a bit
for each RBG. A UE 115 may receive the type 0 resource allocation (e.g., a bitmap
indicated via DCI), and may identify which RBGs are included in the grant based on
an RBG configuration (e.g., a configuration or indexing of RBGs) and 1's indicated
by the bitmap. A type 1 resource allocation may refer to a continuous resource allocation,
indicated by a starting RB or RBG and an ending RB or RBG. In some cases, resource
allocation using type 0 or type 1 may also depend on higher layer signaling, and the
DCI may indicate the allocation according to the higher layer signaling.
[0052] In a type 0 allocation, an RBG size of a first RBG and a last RBG in a bandwidth
part may be determined using a formula designated by type 0 allocation, as will be
described in greater detail below with reference to FIG. 2. However, in certain cases,
for example when a bandwidth part includes a single RBG, the designated formulas may
yield different RBG sizes for the first and last RBGs, even though the first and last
RBG are the same RBGs. These conflicting results may cause errors in resource allocation
by base station 105 and resource identification by UE 115.
[0053] Further, similar techniques may be utilized to identify precoding resource block
groups (PRGs) within various BWPs in a carrier bandwidth. UE 115 may be configured
to identify the size of the first and PRG of a BWP. If the BWP includes a single PRG,
then a UE may identify different sizes for the first and last PRG based on a precoding
granularity, even though first and last PRG is the same PRG. These conflicting results
may also cause errors in resource allocation by base station 105 and resource identification
by UE 115.
[0054] Various techniques described herein may be utilized to avoid these potential errors.
These techniques are applicable to both resource allocation via higher layer signaling
as well as resource allocation based on DCI. In one example technique, base station
105 may identify a particular resource allocation (e.g., downlink resource allocation
type 1) in downlink control information transmitted to a UE 115 such that the described
errors may be avoided. The base station 105 may identify the particular resource allocation
upon determining that an identified transmission configuration yields a bandwidth
part size less than or equal to a bandwidth part size threshold and further based
on a resource block group size yielded by the transmission configuration. Thus, rather
than allocating resources according to a second allocation type (e.g., type 0 allocation),
which may potentially result in the described errors, the base station 105 instructs
the UE 115 to utilize a first resource allocation type (e.g., type 1 allocation) which
avoids the possibility of such errors. In other examples, the UE 115 and base station
105 may be configured to set an RBG size equal to BWP size when the UE 115 and base
station 105 determine that certain conditions are present in a transmission configuration.
These techniques may be similarly utilized to avoid the errors caused in allocation
of precoding resource block groups.
[0055] FIG. 2 illustrates an example of a wireless communications system 200 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. In some examples, wireless
communications system 200 may implement aspects of wireless communication system 100.
The wireless communications system includes base station 105 and UE 115. The base
station 105 may communicate with the UE 115 over downlink communication link 240 and
an uplink communication link. A DCI 235 in the downlink communication link 240 may
schedule downlink and uplink data communications. In the illustrated example, the
DCI 235 schedules communication resource structures in a carrier bandwidth 210.
[0056] The carrier bandwidth 210 includes CRBs (e.g., CRB 220), PRBs 205, VRBs (not shown),
and BWPs 215. A BWP 215 includes a subset of contiguous PRBs, which may be a subset
of a contiguous subset of the CRBs in the carrier bandwidth 210. Accordingly, PRBs
205 are defined within each BWP 215. Each BWP 215 may have separate configurations
such as numerology, bandwidth size, frequency location, and control resource set (CORESET).
Each BWP 215 may be defined with respect to a point A 230 corresponding to a center
point of CRB0 220 of the carrier bandwidth 210. For example, BWP 0 215-a may be defined
based on a parameter start BWP0 225-a, which indicates the first PRB (e.g., PRB0 205-a)
of the BWP 0 relative to the CRB0 220. Each BWP 215 may include one or more RBGs (not
shown), which may be a set of consecutive virtual resource blocks defined by a higher
layer parameter. The BWPs 215 and RBGs may be allocated by base station 105 according
to DCI 235, higher layer signaling, or both. As noted, the base station 105 may indicate
various allocation schemes (e.g., allocation types) for allocating the resources of
the carrier bandwidth 210. The allocation schemes may be selected based on factors
such as granularity, type of UE communication (e.g., low latency communication), type
of UE 115 (e.g., internet of things (IoT) device), etc. In some cases, the allocation
schemes may be determined based on a transmission configuration, which may be indicated
by higher layer signaling.
[0057] Each allocation scheme may designate a technique for determining the locations of
the BWPs 215 and a number of RBGs within the BWPs 215, as well as other information.
In some cases, an allocation scheme may designate a technique (e.g., formula) for
determining a number of RBGs within the BWP 215. For example, in downlink resource
allocation type 0, the resource block assignment information may include a bitmap
indicating the RBGs allocated to the UE 115. According to downlink resource allocation
type 0, the total number of RBGs (
NRBG) for a downlink BWP
i of size

PRBs is given by
NRBG = 
However, the value of the last RBG size depends upon various conditions.

Otherwise,

[0058] Accordingly, the size of the edge RBGs (e.g., first and last RBGs of a BWP 215) may
be determined using Formula 1 and Formulas 2a and 2b. However, in the case of
P = 2 (e.g., the RBG size is 2),

, and

(e.g., the size of the BWP 215 is one resource block), the first and last RBGs sizes
may yield different results. In such cases, the first and last RBGs are the same RBG
because the BWP size is one resource block. Formula 1 may yield:

. While Formula 2 may yield:

.
[0059] Accordingly, in this case, the first and last RBG is the same RBG, which means that
the two equations provide contradicting results. The base station 105 may incur an
error when allocating resources in such cases, and/or the UE 115 may incur an error
when decoding a received signal in such cases.
[0060] In a first option for avoiding such errors, a base station 105 may configure UE 115
(e.g., via DCI 235) such that the UE 115 may not expect a BWP 215 size less than an
RBG size (e.g., P). In other words, the base station 105 may allocate resources such
that the cases where contradicting results may occur may be avoided. In order to avoid
the errors, the base station 105 may consider, when identifying a transmission configuration,
whether a BWP size is less than or equal to a threshold based on a resource block
group size. For example, if during identification of a transmission configuration,
the base station 105 determines a BWP size of 1 and an RBG size of 2, then the base
station 105 may allocate resources using a type 1 allocation. In a type 1 allocation
(e.g., a second resource allocation type), the formulas utilized to calculate the
first and last RBG size may not be utilized (as may be the case with a type 0 allocation).
Rather, in a type 1 allocation (e.g., a first resource allocation type), the DCI 235
may indicate a starting resource block and an ending resource block, where the resource
blocks within a resource block group are continuous. Based on the type 1 allocation,
the base station 105 may avoid errors when allocating resources for transmission,
and the UE 115 may avoid errors when decoding a received transmission based on the
DCI 235 indicating a type 1 allocation. Similarly, if the identified transmission
configuration indicates a BWP size less than or equal to three resource blocks and
the RBG size is equal to four resource blocks, then the base station 105 may allocate
resources using a type 1 allocation.
[0061] In some cases, the threshold may be based on or equal to the RBG size. As noted,
if the RBG size is two resource blocks and the BWP size is less than two (e.g., one
resource block), then the type 1 allocation may be designated. Similarly, if the RBG
size is three resource blocks and the BWP is less than or equal to three, then the
type 1 allocation may be designated. Accordingly, the threshold may be set as less
than or equal to the BWP size in some cases.
[0062] In a second option for avoiding such errors, the base station 105 and the UE 115
may be configured to account for the edge cases potentially causing the errors by
designating the RBG size for a transmission configuration as equal to the BWP size
based on a calculated number of RBGs being equal to one. In other words, if the number
of RBGs in a BWP 215 is equal to one, then the RBG size is designated as equaling
the BWP size. Accordingly, the base station 105 may determine an initial RBG size
and BWP size based on various factors and using a type 0 resource allocation. After
determining the RBG size and the BWP size, the base station 105 may calculate a number
of RBGs based on the provided formula or according to the type 0 resource allocation.
In other words, the base station 105 calculates the number of RBGs according to the
equation designated by a type 0 allocation. If the number of RBGs is equal to one,
then the base station 105 may designate (e.g., modify) the RBG size to be equal to
the BWP size.
[0063] The UE 115 may receive the DCI 235 indicating a type 0 resource allocation, determine
the RBG size, BWP size, and BWP start based on the transmission configuration, and
calculate the number of RBGs based on the RBG size, BWP size, and the BWP start. In
some cases, the RBG size, BWP size, and BWP start are indicated in DCI 235. The UE
115 may calculate the number of RBGs as being equal to one. In such cases, the UE
115 may designate the RBG size as equal to the BWP size and decode the corresponding
transmission based on the designation.
[0064] In a third option for avoiding the errors, the base station 105 and the UE 115 may
be configured to account for the edge cases potentially causing the errors by designating
the RBG size for a transmission configuration as equal to the BWP size based on a
comparison between a sum of the BWP size and a start bandwidth part modulo the RBG
size, and the RBG size. The third option may be stated via the following:

[0065] Accordingly, the base station 105 may determine an initial RBG size and BWP size
based on various factors and using a type 0 resource allocation. After determining
the RBG size and the BWP size, the base station 105 may implement the comparison.
Based on the result of the comparison, the base station 105 may designate (e.g., modify)
the RBG size to be equal to the BWP size.
[0066] The UE 115 may receive the DCI 235 indicating a type 0 resource allocation, determine
the RBG size and BWP size based on the transmission configuration, and implement the
comparison. Based on the result of the comparison, the UE 115 may designate the RBG
size as equal to the BWP size and decode the corresponding transmission based on the
designation.
[0067] Similar errors may occur when determining PRG sizes within bandwidth parts 215. For
example, the following procedure may be used to identify the size of the edge (e.g.,
first and last) PRGs in a BWP when the precoding granularity is one of the values
two or four, according to.
The first PRG size is given by

[0068] If

, and

, then using Formulas 3, 4a, and 4b, the size of the first PRG is: 2 - 0
mod 2 = 2, and the size of the last PRG is: (0 + 1)
mod 2 = 1. However, in this case, the first and last PRG is the same PRG, which means
that the two equations provide contradicting results.
[0069] In a first option for avoiding such errors, base station 105 may configure UE 115
(e.g., via DCI 235) such that the UE 115 may not expect a BWP 215 size less than a
PRG size. In other words, the base station 105 may allocate resources such that the
cases where contradicting results may occur may be avoided. In order to avoid the
errors, the base station 105 may consider, when identifying a transmission configuration,
whether a BWP size is less than or equal to a threshold based on a PRG size. For example,
if during identification of a transmission configuration, the base station 105 determines
a BWP size of 1 and an RBG size of 2, then the base station 105 may allocate resources
using a wideband allocation (e.g., wideband precoding granularity). Accordingly, the
formulas utilized to calculate the first and last PRG size may not be utilized. Accordingly,
base station 105 may avoid errors when allocating resources for transmission, and
the UE 115 may avoid errors when decoding a received transmission. Similarly, if the
identified transmission configuration indicates a BWP size less than or equal to three
resource blocks and the PRG size is equal to four resource blocks, then the base station
105 may allocate resources using wideband allocation.
[0070] In a second option for avoiding such errors, the base station 105 and the UE 115
may be configured to account for the edge cases potentially causing the errors by
designating the PRG size for a transmission configuration as equal to the BWP size
based on a calculated number of PRGs being equal to one. In other words, if the number
of PRGs in a BWP 215 is equal to one, then the PRG size is designated as equal to
the BWP size. Accordingly, the base station 105 may determine an initial PRG size
and BWP size based on various factors. After determining the PRG size and the BWP
size, the base station 105 may calculate a number of PRGs based on the provided formula.
If the number of PRGs is equal to one, then the base station 105 may designate (e.g.,
modify) the PRG size to be equal to the BWP size.
[0071] The UE 115 may receive the DCI 235 indicating a particular resource allocation, determine
the PRG size and BWP size based on the transmission configuration, and calculate the
number of PRGs based on the PRG size, BWP size, and the start of BWP. The UE 115 may
calculate the number of PRGs as being equal to one. In such cases, the UE 115 may
designate the PRG size as equal to the BWP size and decode the corresponding transmission
based on the designation.
[0072] In a third option for avoiding the errors, the base station 105 and the UE 115 may
be configured to account for the edge cases potentially causing the errors by designating
the PRG size for a transmission configuration as equal to the BWP size based on a
comparison between a sum of the BWP size and a start bandwidth part modulo the PRG
size, and the PRG size. The third option may be stated via the following:

[0073] Accordingly, the base station 105 may determine an initial PRG size and BWP size
based on various factors. After determining the PRG size and the BWP size, the base
station 105 may implement the comparison. Based on the result of the comparison, the
base station 105 may designate (e.g., modify) the PRG size to be equal to the BWP
size.
[0074] The UE 115 may receive the DCI 235 indicating a particular resource allocation, determine
the PRG size and BWP size based on the transmission configuration, and implement the
comparison. Based on the result of the comparison, the UE 115 may designate the PRG
size as equal to the BWP size and decode the corresponding transmission based on the
designation. The PRG value (
e.g.,PBWP,i) may be provided either by DCI, RRC, or both to the UE.
[0075] FIG. 3 illustrates an example of a process flow diagram 300 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. In some examples, process
flow diagram 300 may implement aspects of wireless communication system 100. Process
flow diagram includes a base station 105 and a UE 115.
[0076] At 305, the base station 105 identifies a transmission configuration. The transmission
configuration may be identified for scheduling a transmission to the UE 115 or for
transmitting a downlink grant to the UE 115. In some cases, the transmission configuration
may be determined based on a carrier bandwidth, UE capability, communication environment,
etc. In some cases, the transmission configuration may be based on a resource allocation
type indicated by higher layer signaling. The transmission configuration may indicate
a resource block group size and a bandwidth part size. The resource block group size
and the bandwidth part size may be determined based on a resource allocation type
(e.g., allocation type 0).
[0077] At 310, the base station 105 designates a first resource allocation type for the
transmission configuration instead of a second resource allocation type for the transmission
configuration for allocating resources to the carrier bandwidth. The designation may
be based at least in part on the bandwidth part size being less than or equal to a
bandwidth part size threshold and further based at least in part on the resource block
group size. For example, the base station 105 may determine that the bandwidth part
size is one resource block and the resource block group size is two resource blocks.
In another example, the base station 105 may determine that the bandwidth part size
is less than or equal to three resource blocks and the resource block group size is
equal to four resource blocks. In some cases, the first resource allocation type is
a type 1 allocation, and the second resource allocation type is a type 0 allocation.
[0078] At 315, the base station 105 transmits downlink control information to the UE 115.
The downlink control information may indicate the first resource allocation type for
the transmission configuration. Based on a type 1 allocation, the downlink control
information may indicate a resource block start parameter and a number of resource
blocks.
[0079] At 320, the base station 105 transmits a data transmission to the UE 115. The data
may be allocated according to the first resource allocation type. At 325, the UE 115
decodes the received data transmission based on the first resource allocation type
indicated in the DCI.
[0080] The operations illustrated in FIG. 3 may be similarly used in a precoding resource
block group scenario. For example, at 305 the base station 105 may identify a transmission
configuration hat indicates a bandwidth part size and a precoding resource block group
size. At 310, the base station 105 may designate a first resource allocation type
(e.g., wideband) over a second resource allocation type (e.g., 2 or 4) based on the
bandwidth part size being less than or equal to a bandwidth part size threshold. At
315, the base station 105 may transmit DCI indicating the allocation for the precoding
resource block groups, and at 320, the base station 105 may transmit a data transmission,
which is decoded according to the indicated allocation at 325 by the UE 115.
[0081] FIG. 4 illustrates an example of a process flow diagram 400 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. In some examples, the
process flow diagram 400 may implement aspects of wireless communication system 100.
The process flow diagram 400 may include a base station 105 and a UE 115.
[0082] At 410, UE 115 may transmit a UE capability indication to the base station 105. The
capability indication may indicate that the UE 115 is capability of decoding messages
based on a bandwidth part size designation as described herein. If the UE 115 is not
capable of performing the bandwidth part size designation, then the base station 105
may implement other techniques, as described herein.
[0083] At 415, the base station 105 (e.g., a first device) identifies a transmission configuration
for a carrier bandwidth allocated for communications with the UE 115 (e.g., a second
device). The transmission configuration may indicate a resource block group size and
a bandwidth part size. In some cases, the transmission configuration may be identified
according to a type 0 allocation and based on various factors, such as a carrier bandwidth,
UE capability, communication environment, etc.
[0084] At 420, the base station 105 calculates a number of resource block groups for the
transmission configuration based at least in part on the indicated resource block
group size and the bandwidth part size and according to a first resource allocation
type. In some cases, the first resource allocation type may be type 0 resource allocation,
which may provide the equation for calculating the number of resource block groups.
[0085] At 425, the base station 105 designates the resource block group size for the transmission
configuration as equal to the bandwidth part size based at least on the calculated
number of resource block groups being equal to one. At 430, the base station 105 communicates
with the UE 115 using the carrier bandwidth and according to the transmission configuration
by transmitting a data transmission to the UE 115. The data transmission may be allocated
according to the designated resource block group size. In some cases, a DCI transmission
may indicate the allocation type to the UE 115.
[0086] At 435, the UE 115 (e.g., a first device) may identify a transmission configuration
of the received data transmission. In some cases, the identification is based on a
received DCI indicating a resource allocation type. The transmission configuration
may indicate a resource block group size and a bandwidth part size.
[0087] At 440, the UE 115 may calculate a number of resource block groups of the transmission
configuration based at least in part on the resource block group size and the bandwidth
part size and according to a first resource allocation type. For example, the UE 115
may calculate the resource block group size according to a type 0 allocation, which
may designate the equation for calculating the resource block group size.
[0088] At 445, the UE 115 may designate the resource block group size of the transmission
configuration as equal to the bandwidth part size based at least in part on the calculate
number of resource block groups being equal to one. At 450, the UE 115 decodes the
data transmission based on the designated resource block group size.
[0089] The operations illustrated in FIG. 4 may be similarly used in a precoding resource
block group scenario. For example, at 405 the UE may indicate the capability of designating
a precoding resource block group size based on the calculation. At 415, the base station
105 may identify the transmission configuration indicating a transmission part size
and a precoding resource block group size. At 420, the base station 105 may calculate
a number of precoding resource block groups for the transmission configuration based
on the precoding resource block group size and the bandwidth part size. At 425, the
base station 105 may designate the PRG size based on the calculated number of precoding
resource block groups being equal to one, and at 430, the base station 105 may send
a data transmission to the UE allocated according to the PRG size designation. The
UE 115 may similarly perform the procedure to decode the transmission based on the
designated PRG size.
[0090] FIG. 5 illustrates an example of a process flow diagram 500 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. In some examples, the
process flow diagram 500 may implement aspects of wireless communication system 100.
The process flow diagram 500 may include a base station 105 and a UE 115.
[0091] At 510, UE 115 may transmit a UE capability indication to the base station 105. The
capability indication may indicate that the UE 115 is capable of decoding messages
based on a bandwidth part size designation as described herein. If the UE 115 is not
capable of performing the bandwidth part size designation, then the base station 105
may implement other techniques, as described herein.
[0092] At 515, the base station 105 (e.g., a first device) identifies a transmission configuration
for a carrier bandwidth allocated for communications with the UE 115 (e.g., a second
device). The transmission configuration may indicate a resource block group size and
a bandwidth part size. In some cases, the transmission configuration may be identified
according to a type 0 allocation and based on various factors, such as a carrier bandwidth,
UE capability, communication environment, etc.
[0093] At 520, the base station 105 conducts a comparison to determine whether a sum of
the identified bandwidth part size and a start bandwidth part of the carrier bandwidth
modulo the resource block group size is less than or equal to the resource block group
size.
[0094] At 525, the base station 105 designates the resource block group size for the transmission
configuration as equal to the bandwidth part size based at least on the determining.
At 530, the base station 105 communicates with the UE 115 using the carrier bandwidth
and according to the transmission configuration by transmitting a data transmission
to the UE 115. The data transmission may be allocated according to the designated
resource block group size. In some cases, a DCI transmission may indicate the allocation
type to the UE 115.
[0095] At 535, the UE 115 (e.g., a first device) may identify a transmission configuration
of the received data transmission. In some cases, the identification is based on a
received DCI indicating a resource allocation type. The transmission configuration
may indicate a resource block group size and a bandwidth part size.
[0096] At 540, the UE 115 may conduct a comparison to determine whether a sum of the identified
bandwidth part size and a start bandwidth part of the carrier bandwidth modulo the
resource block group size is less than or equal to the resource block group size.
[0097] At 545, the UE 115 may designate the resource block group size of the transmission
configuration as equal to the bandwidth part size based at least on the determining.
At 550, the UE 115 decodes the data transmission based on the designated resource
block group size.
[0098] The operations illustrated in FIG. 5 may be similarly used in a precoding resource
block group scenario. For example, at 505 the UE may indicate the capability of designating
a precoding resource block group size based on the comparison. At 515, the base station
105 may identify the transmission configuration indicating a transmission part size
and a precoding resource block group size. At 520, the base station 105 may conduct
a comparison to determine whether a sum of the bandwidth part size and start bandwidth
part of the carrier bandwidth modulo the precoding resource block group size is less
than or equal to the precoding resource block group size. At 525, the base station
105 may designate the PRG size based on the determining, and at 530, the base station
105 may send a data transmission to the UE allocated according to the PRG size designation.
The UE 115 may similarly perform the procedure to decode the transmission based on
the designated PRG size.
[0099] FIG. 6 shows a block diagram 600 of a device 605 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The device 605 may be an example of aspects
of a UE 115 or base station 105 as described herein. The device 605 may include a
receiver 610, a communications manager 615, and a transmitter 620. The device 605
may also include a processor. Each of these components may be in communication with
one another (e.g., via one or more buses).
[0100] Receiver 610 may receive information such as packets, user data, or control information
associated with various information channels (e.g., control channels, data channels,
and information related to determining transmission configurations, etc.). Information
may be passed on to other components of the device 605. The receiver 610 may be an
example of aspects of the transceiver 920 or 1020 as described with reference to FIGs.
9 and 10. The receiver 610 may utilize a single antenna or a set of antennas.
[0101] The communications manager 615 may identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a resource block group size and a bandwidth part size, calculate a number
of resource block groups for the transmission configuration based on the resource
block group size and the bandwidth part size and according to a first resource allocation
type, designate the resource block group size for the transmission configuration as
equal to the bandwidth part size based on the calculated number of resource block
groups being equal to one, and communicate with the second device using the carrier
bandwidth according to the transmission configuration. The communications manager
615 may also identify a transmission configuration for a carrier bandwidth allocated
for communications with a second device, the transmission configuration indicating
a resource block group size and a bandwidth part size, determine whether a sum of
the bandwidth part size and a start bandwidth part of the carrier bandwidth modulo
the resource block group size is less than or equal to the resource block group size,
designate the resource block group size for the transmission configuration as equal
to the bandwidth part size based on the determining, and communicate with the second
device using the carrier bandwidth according to the transmission configuration. The
communications manager 615 may also identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a precoding resource block group size and a bandwidth part size, calculate
a number of precoding resource block groups for the transmission configuration based
on the precoding resource block group size and the bandwidth part size, designate
the precoding resource block group size for the transmission configuration as equal
to the bandwidth part size based on the calculated number of precoding resource block
groups being equal to one, and communicate with the second device using the carrier
bandwidth according to the transmission configuration. The communications manager
615 may also identify a transmission configuration for a carrier bandwidth allocated
for communications with a second device, the transmission configuration indicating
a precoding resource block group size and a bandwidth part size, determine whether
a sum of the bandwidth part size and a start bandwidth part of the carrier bandwidth
modulo the precoding resource block group size is less than or equal to the precoding
resource block group size, designate the precoding resource block group size for the
transmission configuration as equal to the bandwidth part size based on the determining,
and communicate with the second device using the carrier bandwidth according to the
transmission configuration. The communications manager 615 may be an example of aspects
of the communications manager 910 or 1010 as described herein.
[0102] One implementation includes identifying a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a resource block group size and a bandwidth part size, calculating a number
of resource block groups for the transmission configuration based at least in part
on the resource block group size and the bandwidth part size and according to a first
resource allocation type, designating the resource block group size for the transmission
configuration as equal to the bandwidth part size based at least in part on the calculated
number of resource block groups being equal to one, and communicating with the second
device using the carrier bandwidth according to the transmission configuration. The
actions performed by the communications manager 615 as described may be implemented
to realize one or more potential advantages in a UE and a base station. This implementation
may allow to save power and increase battery live by avoiding potential allocation
calculation errors. These errors may be handled in different ways according to UE
configurations, base station configurations, carrier configurations, etc., but the
implementation allows the UE and base station to avoid the errors, and thus saving
power and increasing battery live by avoiding error handling.
[0103] One implementation includes identifying a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a resource block group size and a bandwidth part size, determining whether
a sum of the bandwidth part size and a start bandwidth part of the carrier bandwidth
modulo the resource block group size is less than or equal to the resource block group
size, designating the resource block group size for the transmission configuration
as equal to the bandwidth part size based at least in part on the determining, and
communicating with the second device using the carrier bandwidth according to the
transmission configuration. The actions performed by the communications manager 615
as described may be implemented to realize one or more potential advantages in a UE
and a base station. This implementation may allow to save power and increase battery
live by avoiding potential allocation calculation errors. These errors may be handled
in different ways according to UE configurations, base station configurations, carrier
configurations, etc., but the implementation allows the UE and base station to avoid
the errors, and thus saving power and increasing battery live by avoiding error handling.
[0104] One implementation includes identifying a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a precoding resource block group size and a bandwidth part size, calculating
a number of precoding resource block groups for the transmission configuration based
at least in part on the precoding resource block group size and the bandwidth part
size, designating the precoding resource block group size for the transmission configuration
as equal to the bandwidth part size based at least in part on the calculated number
of precoding resource block groups being equal to one, and communicating with the
second device using the carrier bandwidth according to the transmission configuration.
The actions performed by the communications manager 615 as described may be implemented
to realize one or more potential advantages in a UE and a base station. This implementation
may allow to save power and increase battery live by avoiding potential allocation
calculation errors. These errors may be handled in different ways according to UE
configurations, base station configurations, carrier configurations, etc., but the
implementation allows the UE and base station to avoid the errors, and thus saving
power and increasing battery live by avoiding error handling.
[0105] One implementation includes identifying a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a precoding resource block group size and a bandwidth part size, determining
whether a sum of the bandwidth part size and a start bandwidth part of the carrier
bandwidth modulo the precoding resource block group size is less than or equal to
the precoding resource block group size, designating the precoding resource block
group size for the transmission configuration as equal to the bandwidth part size
based at least in part on the determining, and communicating with the second device
using the carrier bandwidth according to the transmission configuration. The actions
performed by the communications manager 615 as described may be implemented to realize
one or more potential advantages in a UE and a base station. This implementation may
allow to save power and increase battery live by avoiding potential allocation calculation
errors. These errors may be handled in different ways according to UE configurations,
base station configurations, carrier configurations, etc., but the implementation
allows the UE and base station to avoid the errors, and thus saving power and increasing
battery live by avoiding error handling.
[0106] Based on designating the resource block group size by the base station and the UE,
the processing components may avoid wasting processing power performing calculations
that may cause potential errors, handling errors, etc. Based on the allocation of
the resources, the processor of the UE or base station may turn on one or more processing
units for receiving a transmission or allocating a transmission, increase a processing
clock, or a similar mechanism within the UE or base station. As such, when the data
transmission is received or a being allocated for transmission, the processor may
be ready to check the potential error conditions, and designate the resource block
group size to avoid the calculations that may cause errors which may increase processing
efficiency by avoiding potential errors.
[0107] Based on designating the precoding resource block group size by the base station
and the UE, the processing components may avoid wasting processing power performing
calculations that may cause potential errors, handling errors, etc. Based on the allocation
of the resources, the processor of the UE or base station may turn on one or more
processing units for receiving or transmitting a transmission, increase a processing
clock, or a similar mechanism within the UE or base station. As such, when the data
transmission is received or being allocated for transmission, the processor may be
ready to check the potential error conditions, and designate the resource block group
size to avoid the calculations that may cause errors which may increase processing
efficiency by avoiding potential errors.
[0108] The communications manager 615, or its sub-components, may be implemented in hardware,
code (e.g., software or firmware) executed by a processor, or any combination thereof.
If implemented in code executed by a processor, the functions of the communications
manager 615, or its sub-components may be executed by a general-purpose processor,
a digital signal processor (DSP), an application-specific integrated circuit (ASIC),
a field programmable gate array (FPGA) or other programmable logic device, discrete
gate or transistor logic, discrete hardware components, or any combination thereof
designed to perform the functions described in the present disclosure.
[0109] The communications manager 615, or its sub-components, may be physically located
at various positions, including being distributed such that portions of functions
are implemented at different physical locations by one or more physical components.
In some examples, the communications manager 615, or its sub-components, may be a
separate and distinct component in accordance with various aspects of the present
disclosure. In some examples, the communications manager 615, or its sub-components,
may be combined with one or more other hardware components, including but not limited
to an input/output (I/O) component, a transceiver, a network server, another computing
device, one or more other components described in the present disclosure, or a combination
thereof in accordance with various aspects of the present disclosure.
[0110] Transmitter 620 may transmit signals generated by other components of the device
605. In some examples, the transmitter 620 may be collocated with a receiver 610 in
a transceiver module. For example, the transmitter 620 may be an example of aspects
of the transceiver 920 or 1020 as described with reference to FIGs. 9 and 10. The
transmitter 620 may utilize a single antenna or a set of antennas.
[0111] FIG. 7 shows a block diagram 700 of a device 705 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The device 705 may be an example of aspects
of a device 605, a UE 115, or a base station 105 as described herein. The device 705
may include a receiver 710, a communications manager 715, and a transmitter 740. The
device 705 may also include a processor. Each of these components may be in communication
with one another (e.g., via one or more buses).
[0112] Receiver 710 may receive information such as packets, user data, or control information
associated with various information channels (e.g., control channels, data channels,
and information related to determining transmission configurations, etc.). Information
may be passed on to other components of the device 705. The receiver 710 may be an
example of aspects of the transceiver 920 or 1020 as described with reference to FIGs.
9 and 10. The receiver 710 may utilize a single antenna or a set of antennas.
[0113] The communications manager 715 may be an example of aspects of the communications
manager 615 as described herein. The communications manager 715 may include a transmission
configuration component 720, a calculation component 725, a resource allocation designation
component 730, and a communication component 735. The communications manager 715 may
be an example of aspects of the communications manager 910 or 1010 as described herein.
[0114] The transmission configuration component 720 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a second device, the transmission
configuration indicating a resource block group size and a bandwidth part size. The
calculation component 725 may calculate a number of resource block groups for the
transmission configuration based on the resource block group size and the bandwidth
part size and according to a first resource allocation type.
[0115] The transmission configuration component 720 may identify a transmission configuration
for the carrier bandwidth that further indicates a start resource block for the bandwidth
part. The calculation component 725 may calculate the number of resource block groups
for the transmission configuration based at least in part on the resource block group
size, the bandwidth part size, and a start resource block of the bandwidth part.
[0116] The resource allocation designation component 730 may designate the resource block
group size for the transmission configuration as equal to the bandwidth part size
based on the calculated number of resource block groups being equal to one. The communication
component 735 may communicate with the second device using the carrier bandwidth according
to the transmission configuration. The transmission configuration component 720 may
identify the transmission configuration that indicates a start resource block of the
bandwidth part.
[0117] The transmission configuration component 720 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a second device, the transmission
configuration indicating a resource block group size and a bandwidth part size. The
calculation component 725 may determine whether a sum of the bandwidth part size and
a start bandwidth part of the carrier bandwidth modulo the resource block group size
is less than or equal to the resource block group size.
[0118] The resource allocation designation component 730 may designate the resource block
group size for the transmission configuration as equal to the bandwidth part size
based on the determining. The communication component 735 may communicate with the
second device using the carrier bandwidth according to the transmission configuration.
[0119] The transmission configuration component 720 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a second device, the transmission
configuration indicating a precoding resource block group size and a bandwidth part
size. The calculation component 725 may calculate a number of precoding resource block
groups for the transmission configuration based on the precoding resource block group
size and the bandwidth part size. The calculation component 725 may calculate the
number of precoding resource block groups for the transmission configuration based
at least in part on the precoding resource block group size, the bandwidth part size,
and a start precoding resource block of the bandwidth part.
[0120] The resource allocation designation component 730 may designate the precoding resource
block group size for the transmission configuration as equal to the bandwidth part
size based on the calculated number of precoding resource block groups being equal
to one. The resource allocation designation component 730 may identify the transmission
configuration that indicates the start precoding resource block of the bandwidth part.
[0121] The communication component 735 may communicate with the second device using the
carrier bandwidth according to the transmission configuration. The transmission configuration
component 720 may identify a transmission configuration for a carrier bandwidth allocated
for communications with a second device, the transmission configuration indicating
a precoding resource block group size and a bandwidth part size. The calculation component
725 may determine whether a sum of the bandwidth part size and a start bandwidth part
of the carrier bandwidth modulo the precoding resource block group size is less than
or equal to the precoding resource block group size.
[0122] The resource allocation designation component 730 may designate the precoding resource
block group size for the transmission configuration as equal to the bandwidth part
size based on the determining. The communication component 735 may communicate with
the second device using the carrier bandwidth according to the transmission configuration.
[0123] The transmission configuration component 720 may identify the transmission configuration
that indicates the start precoding resource block of the bandwidth part.
[0124] Transmitter 740 may transmit signals generated by other components of the device
705. In some examples, the transmitter 740 may be collocated with a receiver 710 in
a transceiver module. For example, the transmitter 740 may be an example of aspects
of the transceiver 920 or 1020 as described with reference to FIGs. 9 and 10. The
transmitter 740 may utilize a single antenna or a set of antennas.
[0125] FIG. 8 shows a block diagram 800 of a communications manager 805 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. The communications manager
805 may be an example of aspects of a communications manager 615, a communications
manager 715, or a communications manager 910 described herein. The communications
manager 805 may include a transmission configuration component 810, a calculation
component 815, a resource allocation designation component 820, a communication component
825, and a capability component 830. Each of these modules may communicate, directly
or indirectly, with one another (e.g., via one or more buses).
[0126] The transmission configuration component 810 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a second device, the transmission
configuration indicating a resource block group size and a bandwidth part size. In
some examples, the transmission configuration component 810 may identify a transmission
configuration for a carrier bandwidth allocated for communications with a second device,
the transmission configuration indicating a resource block group size and a bandwidth
part size. In some examples, the transmission configuration component 810 may identify
a transmission configuration for a carrier bandwidth allocated for communications
with a second device, the transmission configuration indicating a precoding resource
block group size and a bandwidth part size.
[0127] In some examples, the transmission configuration component 810 may identify a transmission
configuration for a carrier bandwidth allocated for communications with a second device,
the transmission configuration indicating a precoding resource block group size and
a bandwidth part size. In some examples, the transmission configuration component
810 may identify the transmission configuration according to a resource allocation
type to indicate the resource block group size and the bandwidth part size.
[0128] In some examples, the transmission configuration component 810 may identify the resource
block group size of a first resource block group of the carrier bandwidth as a first
value based on a resource allocation type. In some examples, the transmission configuration
component 810 may identify the resource block group size of a last resource block
group of the carrier bandwidth as a second value based on the resource allocation
type, where the first resource block group and the last resource block group of the
carrier bandwidth include a same resource block group and where the first value and
the second value are different.
[0129] In some examples, the transmission configuration component 810 may identify the transmission
configuration according to a resource allocation type to indicate the resource block
group size and the bandwidth part size. In some examples, the transmission configuration
component 810 may identify the resource block group size of a first resource block
group of the carrier bandwidth as a first value based on a resource allocation type.
[0130] In some examples, the transmission configuration component 810 may identify the resource
block group size of a last resource block group of the carrier bandwidth as a second
value based on the resource allocation type, where the first resource block group
and the last resource block group of the carrier bandwidth include a same resource
block group and where the first value and the second value are different. In some
examples, the transmission configuration component 810 may identify the transmission
configuration according to a resource allocation type to indicate the precoding resource
block group size and the bandwidth part size. In some examples, the transmission configuration
component 810 may identify the precoding resource block group size of a first precoding
resource block group of the carrier bandwidth as a first value.
[0131] In some examples, the transmission configuration component 810 may identify the precoding
resource block group size of a last precoding resource block group of the carrier
bandwidth as a second value, where the first precoding resource block group and the
last precoding resource block group of the carrier bandwidth include a same precoding
resource block group and where the first value and the second value are different.
In some examples, the transmission configuration component 810 may identify the transmission
configuration according to a resource allocation type to indicate the precoding resource
block group size and the bandwidth part size.
[0132] In some examples, the transmission configuration component 810 may identify the precoding
resource block group size of a first precoding resource block group of the carrier
bandwidth as a first value based on a resource allocation type. In some examples,
the transmission configuration component 810 may identify the precoding resource block
group size of a last precoding resource block group of the carrier bandwidth as a
second value based on the resource allocation type, where the first precoding resource
block group and the last precoding resource block group of the carrier bandwidth include
a same precoding resource block group and where the first value and the second value
are different.
[0133] The calculation component 815 may calculate a number of resource block groups for
the transmission configuration based on the resource block group size and the bandwidth
part size and according to a first resource allocation type. In some examples, the
calculation component 815 may determine whether a sum of the bandwidth part size and
a start bandwidth part of the carrier bandwidth modulo the resource block group size
is less than or equal to the resource block group size. In some examples, the calculation
component 815 may calculate a number of precoding resource block groups for the transmission
configuration based on the precoding resource block group size and the bandwidth part
size. In some examples, the calculation component 815 may determine whether a sum
of the bandwidth part size and a start bandwidth part of the carrier bandwidth modulo
the precoding resource block group size is less than or equal to the precoding resource
block group size.
[0134] The resource allocation designation component 820 may designate the resource block
group size for the transmission configuration as equal to the bandwidth part size
based on the calculated number of resource block groups being equal to one. In some
examples, the resource allocation designation component 820 may designate the resource
block group size for the transmission configuration as equal to the bandwidth part
size based on the determining.
[0135] In some examples, the resource allocation designation component 820 may designate
the precoding resource block group size for the transmission configuration as equal
to the bandwidth part size based on the calculated number of precoding resource block
groups being equal to one. In some examples, the resource allocation designation component
820 may designate the precoding resource block group size for the transmission configuration
as equal to the bandwidth part size based on the determining.
[0136] The communication component 825 may communicate with the second device using the
carrier bandwidth according to the transmission configuration. In some examples, the
communication component 825 may communicate with the second device using the carrier
bandwidth according to the transmission configuration. In some examples, the communication
component 825 may communicate with the second device using the carrier bandwidth according
to the transmission configuration.
[0137] In some examples, the communication component 825 may communicate with the second
device using the carrier bandwidth according to the transmission configuration. In
some examples, the communication component 825 may transmit, to a UE, a transmission
including resources allocated using the designated resource block group size. In some
examples, the communication component 825 may transmit, to a base station, a transmission
including resources allocated using the designated resource block group size.
[0138] In some examples, the communication component 825 may receive, at a UE, a transmission
including resources allocated using the designated resource block group size. In some
examples, the communication component 825 may decode the transmission based on the
designated resource block group size. In some examples, the communication component
825 may transmit, to a UE, a transmission including resources allocated using the
designated resource block group size.
[0139] In some examples, the communication component 825 may transmit, to a base station,
a transmission including resources allocated using the designated resource block group
size. In some examples, the communication component 825 may receive, at a UE, a transmission
including resources allocated using the designated resource block group size.
[0140] In some examples, the communication component 825 may decode the transmission based
on the designated resource block group size. In some examples, the communication component
825 may transmit, to a UE, a transmission including resources allocated using the
designated precoding resource block group size. In some examples, the communication
component 825 may transmit, to a base station, a transmission including resources
allocated using the designated precoding resource block group size.
[0141] In some examples, the communication component 825 may receive, at a UE, a transmission
including resources allocated using the designated precoding resource block group
size. In some examples, the communication component 825 may decode the transmission
based on the designated precoding resource block group size. In some examples, the
communication component 825 may transmit, to a UE, a transmission including resources
allocated using the designated precoding resource block group size.
[0142] In some examples, the communication component 825 may transmit, to a base station,
a transmission including resources allocated using the designated precoding resource
block group size. In some examples, the communication component 825 may receive, at
a UE, a transmission including resources allocated using the designated precoding
resource block group size. In some examples, the communication component 825 may decode
the transmission based on the designated precoding resource block group size.
[0143] The capability component 830 may receive, from a UE, a capability indication indicating
that the UE is capable of designating the resource block group size as equal to the
bandwidth part size based on the calculated number of resource block groups being
equal to one. In some examples, the capability component 830 may receive, from a UE,
a capability indication indicating that the UE is capable of designating the resource
block group size as equal to the bandwidth part size based on the determining.
[0144] In some examples, the capability component 830 may receive, from a UE, a capability
indication indicating that the UE is capable of designating the precoding resource
block group size as equal to the bandwidth part size based on the calculated number
of precoding resource block groups being equal to one. In some examples, the capability
component 830 may receive, from a UE, a capability indication indicating that the
UE is capable of designating the precoding resource block group size as equal to the
bandwidth part size based on the determining.
[0145] FIG. 9 shows a diagram of a system 900 including a device 905 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. The device 905 may be
an example of or include the components of device 605, device 705, or a UE 115 as
described herein. The device 905 may include components for bi-directional voice and
data communications including components for transmitting and receiving communications,
including a communications manager 910, a transceiver 920, an antenna 925, memory
930, a processor 940, and an I/O controller 950. These components may be in electronic
communication via one or more buses (e.g., bus 955).
[0146] The communications manager 910 may identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a resource block group size and a bandwidth part size, calculate a number
of resource block groups for the transmission configuration based on the resource
block group size and the bandwidth part size and according to a first resource allocation
type, designate the resource block group size for the transmission configuration as
equal to the bandwidth part size based on the calculated number of resource block
groups being equal to one, and communicate with the second device using the carrier
bandwidth according to the transmission configuration. The communications manager
910 may also identify a transmission configuration for a carrier bandwidth allocated
for communications with a second device, the transmission configuration indicating
a resource block group size and a bandwidth part size, determine whether a sum of
the bandwidth part size and a start bandwidth part of the carrier bandwidth modulo
the resource block group size is less than or equal to the resource block group size,
designate the resource block group size for the transmission configuration as equal
to the bandwidth part size based on the determining, and communicate with the second
device using the carrier bandwidth according to the transmission configuration. The
communications manager 910 may also identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a precoding resource block group size and a bandwidth part size, calculate
a number of precoding resource block groups for the transmission configuration based
on the precoding resource block group size and the bandwidth part size, designate
the precoding resource block group size for the transmission configuration as equal
to the bandwidth part size based on the calculated number of precoding resource block
groups being equal to one, and communicate with the second device using the carrier
bandwidth according to the transmission configuration. The communications manager
910 may also identify a transmission configuration for a carrier bandwidth allocated
for communications with a second device, the transmission configuration indicating
a precoding resource block group size and a bandwidth part size, determine whether
a sum of the bandwidth part size and a start bandwidth part of the carrier bandwidth
modulo the precoding resource block group size is less than or equal to the precoding
resource block group size, designate the precoding resource block group size for the
transmission configuration as equal to the bandwidth part size based on the determining,
and communicate with the second device using the carrier bandwidth according to the
transmission configuration.
[0147] Transceiver 920 may communicate bi-directionally, via one or more antennas, wired,
or wireless links as described herein. For example, the transceiver 920 may represent
a wireless transceiver and may communicate bi-directionally with another wireless
transceiver. The transceiver 920 may also include a modem to modulate the packets
and provide the modulated packets to the antennas for transmission, and to demodulate
packets received from the antennas.
[0148] In some cases, the wireless device may include a single antenna 925. However, in
some cases the device may have more than one antenna 925, which may be capable of
concurrently transmitting or receiving multiple wireless transmissions.
[0149] The memory 930 may include random-access memory (RAM), read-only memory (ROM), or
a combination thereof. The memory 930 may store computer-readable code 935 including
instructions that, when executed by a processor (e.g., the processor 940) cause the
device to perform various functions described herein. In some cases, the memory 930
may contain, among other things, a basic input/output system (BIOS) which may control
basic hardware or software operation such as the interaction with peripheral components
or devices.
[0150] The processor 940 may include an intelligent hardware device, (e.g., a general-purpose
processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic
device, a discrete gate or transistor logic component, a discrete hardware component,
or any combination thereof). In some cases, the processor 940 may be configured to
operate a memory array using a memory controller. In other cases, a memory controller
may be integrated into the processor 940. The processor 940 may be configured to execute
computer-readable instructions stored in a memory (e.g., the memory 930) to cause
the device 905 to perform various functions (e.g., functions or tasks supporting determining
transmission configurations).
[0151] The I/O controller 950 may manage input and output signals for the device 905. The
I/O controller 950 may also manage peripherals not integrated into the device 905.
In some cases, the I/O controller 950 may represent a physical connection or port
to an external peripheral. In some cases, the I/O controller 950 may utilize an operating
system such as iOS
®, ANDROID
®, MS-DOS
®, MS-WINDOWS
®, OS/2
®, UNIX
®, LINUX
®, or another known operating system. In other cases, the I/O controller 950 may represent
or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
In some cases, the I/O controller 950 may be implemented as part of a processor. In
some cases, a user may interact with the device 905 via the I/O controller 950 or
via hardware components controlled by the I/O controller 950.
[0152] The code 935 may include instructions to implement aspects of the present disclosure,
including instructions to support wireless communications. The code 935 may be stored
in a non-transitory computer-readable medium such as system memory or other type of
memory. In some cases, the code 935 may not be directly executable by the processor
940 but may cause a computer (e.g., when compiled and executed) to perform functions
described herein.
[0153] FIG. 10 shows a diagram of a system 1000 including a device 1005 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. The device 1005 may be
an example of or include the components of device 605, device 705, or a base station
105 as described herein. The device 1005 may include components for bi-directional
voice and data communications including components for transmitting and receiving
communications, including a communications manager 1010, a network communications
manager 1015, a transceiver 1020, an antenna 1025, memory 1030, a processor 1040,
and an inter-station communications manager 1045. These components may be in electronic
communication via one or more buses (e.g., bus 1055).
[0154] The communications manager 1010 may identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a resource block group size and a bandwidth part size, calculate a number
of resource block groups for the transmission configuration based on the resource
block group size and the bandwidth part size and according to a first resource allocation
type, designate the resource block group size for the transmission configuration as
equal to the bandwidth part size based on the calculated number of resource block
groups being equal to one, and communicate with the second device using the carrier
bandwidth according to the transmission configuration.
[0155] The communications manager 1010 may also identify a transmission configuration for
a carrier bandwidth allocated for communications with a second device, the transmission
configuration indicating a resource block group size and a bandwidth part size, determine
whether a sum of the bandwidth part size and a start bandwidth part of the carrier
bandwidth modulo the resource block group size is less than or equal to the resource
block group size, designate the resource block group size for the transmission configuration
as equal to the bandwidth part size based on the determining, and communicate with
the second device using the carrier bandwidth according to the transmission configuration.
[0156] The communications manager 1010 may also identify a transmission configuration for
a carrier bandwidth allocated for communications with a second device, the transmission
configuration indicating a precoding resource block group size and a bandwidth part
size, calculate a number of precoding resource block groups for the transmission configuration
based on the precoding resource block group size and the bandwidth part size, designate
the precoding resource block group size for the transmission configuration as equal
to the bandwidth part size based on the calculated number of precoding resource block
groups being equal to one, and communicate with the second device using the carrier
bandwidth according to the transmission configuration.
[0157] The communications manager 1010 may also identify a transmission configuration for
a carrier bandwidth allocated for communications with a second device, the transmission
configuration indicating a precoding resource block group size and a bandwidth part
size, determine whether a sum of the bandwidth part size and a start bandwidth part
of the carrier bandwidth modulo the precoding resource block group size is less than
or equal to the precoding resource block group size, designate the precoding resource
block group size for the transmission configuration as equal to the bandwidth part
size based on the determining, and communicate with the second device using the carrier
bandwidth according to the transmission configuration.
[0158] Network communications manager 1015 may manage communications with the core network
(e.g., via one or more wired backhaul links). For example, the network communications
manager 1015 may manage the transfer of data communications for client devices, such
as one or more UEs 115.
[0159] Transceiver 1020 may communicate bi-directionally, via one or more antennas, wired,
or wireless links as described herein. For example, the transceiver 1020 may represent
a wireless transceiver and may communicate bi-directionally with another wireless
transceiver. The transceiver 1020 may also include a modem to modulate the packets
and provide the modulated packets to the antennas for transmission, and to demodulate
packets received from the antennas.
[0160] In some cases, the wireless device may include a single antenna 1025. However, in
some cases the device may have more than one antenna 1025, which may be capable of
concurrently transmitting or receiving multiple wireless transmissions.
[0161] The memory 1030 may include RAM, ROM, or a combination thereof. The memory 1030 may
store computer-readable code 1035 including instructions that, when executed by a
processor (e.g., the processor 1040) cause the device to perform various functions
described herein. In some cases, the memory 1030 may contain, among other things,
a BIOS which may control basic hardware or software operation such as the interaction
with peripheral components or devices.
[0162] The processor 1040 may include an intelligent hardware device, (e.g., a general-purpose
processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic
device, a discrete gate or transistor logic component, a discrete hardware component,
or any combination thereof). In some cases, the processor 1040 may be configured to
operate a memory array using a memory controller. In other cases, a memory controller
may be integrated into the processor 1040. The processor 1040 may be configured to
execute computer-readable instructions stored in a memory (e.g., the memory 1030)
to cause the device 1005 to perform various functions (e.g., functions or tasks supporting
determining transmission configurations).
[0163] Inter-station communications manager 1045 may manage communications with other base
station 105, and may include a controller or scheduler for controlling communications
with UEs 115 in cooperation with other base stations 105. For example, the inter-station
communications manager 1045 may coordinate scheduling for transmissions to UEs 115
for various interference mitigation techniques such as beamforming or joint transmission.
In some examples, inter-station communications manager 1045 may provide an X2 interface
within an LTE/LTE-A wireless communication network technology to provide communication
between base stations 105.
[0164] The code 1035 may include instructions to implement aspects of the present disclosure,
including instructions to support wireless communications. The code 1035 may be stored
in a non-transitory computer-readable medium such as system memory or other type of
memory. In some cases, the code 1035 may not be directly executable by the processor
1040 but may cause a computer (e.g., when compiled and executed) to perform functions
described herein.
[0165] FIG. 11 shows a block diagram 1100 of a device 1105 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The device 1105 may be an example of aspects
of a base station 105 as described herein. The device 1105 may include a receiver
1110, a communications manager 1115, and a transmitter 1120. The device 1105 may also
include a processor. Each of these components may be in communication with one another
(e.g., via one or more buses).
[0166] The receiver 1110 may receive information such as packets, user data, or control
information associated with various information channels (e.g., control channels,
data channels, and information related to determining transmission configurations,
etc.). Information may be passed on to other components of the device 1105. The receiver
1110 may be an example of aspects of the transceiver 1420 described with reference
to FIG. 14. The receiver 1110 may utilize a single antenna or a set of antennas.
[0167] The communications manager 1115 may identify a transmission configuration for a carrier
bandwidth allocated for communications with a UE, the transmission configuration indicating
a resource block group size and a bandwidth part size, designate a first resource
allocation type for the transmission configuration instead of a second resource allocation
type for the transmission configuration for allocating resources to the carrier bandwidth
based on the bandwidth part size being less than or equal to a bandwidth part size
threshold and further based on the resource block group size, and transmit, to the
UE, downlink control information indicating the first resource allocation type for
the transmission configuration. The communications manager 1115 may also identify
a transmission configuration for a carrier bandwidth allocated for communications
with a UE, the transmission configuration indicating a bandwidth part size, designate
a first resource allocation type for the transmission configuration instead of a second
resource allocation type for the transmission configuration for allocating resources
to the carrier bandwidth based on the bandwidth part size being less than or equal
to a bandwidth part size threshold, and transmit, to the UE, downlink control information
indicating the first resource allocation type for the transmission configuration.
The communications manager 1115 may be an example of aspects of the communications
manager 1410 described herein.
[0168] One implementation includes identifying a transmission configuration for a carrier
bandwidth allocated for communications with a user equipment (UE), the transmission
configuration indicating a resource block group size and a bandwidth part size, designating
a first resource allocation type for the transmission configuration instead of a second
resource allocation type for the transmission configuration for allocating resources
to the carrier bandwidth based at least in part on the bandwidth part size being less
than or equal to a bandwidth part size threshold and further based at least in part
on the resource block group size, and transmitting, to the UE, downlink control information
indicating the first resource allocation type for the transmission configuration.
The actions performed by the communications manager 1115 as described may be implemented
to realize one or more potential advantages. This implementation may allow to save
power and increase battery live by avoiding potential allocation calculation errors.
These errors may be handled in different ways according to UE configurations, carrier
configurations, etc., but the implementation allows the UE to avoid the errors, and
thus saving power and increasing battery live by avoiding error handling.
[0169] One implementation includes identifying a transmission configuration for a carrier
bandwidth allocated for communications with a user equipment (UE), the transmission
configuration indicating a bandwidth part size, designating a first resource allocation
type for the transmission configuration instead of a second resource allocation type
for the transmission configuration for allocating resources to the carrier bandwidth
based at least in part on the bandwidth part size being less than or equal to a bandwidth
part size threshold, and transmitting, to the UE, downlink control information indicating
the first resource allocation type for the transmission configuration. The actions
performed by the communications manager 615 as described may be implemented to realize
one or more potential advantages. This implementation may allow to save power and
increase battery live by avoiding potential allocation calculation errors. These errors
may be handled in different ways according to UE configurations, carrier configurations,
etc., but the implementation allows the UE to avoid the errors, and thus saving power
and increasing battery live by avoiding error handling.
[0170] Based on designating the resource allocation type by the base station, the processing
components may avoid wasting processing power performing calculations that may cause
potential errors, handling errors, etc. Based on the received configuration (e.g.,
via DCI), the processor of the UE may turn on one or more processing units for receiving
a transmission, increase a processing clock, or a similar mechanism within the UE.
As such, when the data transmission is received, the processor may be ready to decode
the transmission more efficiently through the reduction of calculation errors.
[0171] The communications manager 1115, or its sub-components, may be implemented in hardware,
code (e.g., software or firmware) executed by a processor, or any combination thereof.
If implemented in code executed by a processor, the functions of the communications
manager 1115, or its sub-components may be executed by a general-purpose processor,
a DSP, an application-specific integrated circuit (ASIC), a FPGA or other programmable
logic device, discrete gate or transistor logic, discrete hardware components, or
any combination thereof designed to perform the functions described in the present
disclosure.
[0172] The communications manager 1115, or its sub-components, may be physically located
at various positions, including being distributed such that portions of functions
are implemented at different physical locations by one or more physical components.
In some examples, the communications manager 1115, or its sub-components, may be a
separate and distinct component in accordance with various aspects of the present
disclosure. In some examples, the communications manager 1115, or its sub-components,
may be combined with one or more other hardware components, including but not limited
to an input/output (I/O) component, a transceiver, a network server, another computing
device, one or more other components described in the present disclosure, or a combination
thereof in accordance with various aspects of the present disclosure.
[0173] The transmitter 1120 may transmit signals generated by other components of the device
1105. In some examples, the transmitter 1120 may be collocated with a receiver 1110
in a transceiver module. For example, the transmitter 1120 may be an example of aspects
of the transceiver 1420 described with reference to FIG. 14. The transmitter 1120
may utilize a single antenna or a set of antennas.
[0174] FIG. 12 shows a block diagram 1200 of a device 1205 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The device 1205 may be an example of aspects
of a device 1105, or a base station 105 as described herein. The device 1205 may include
a receiver 1210, a communications manager 1215, and a transmitter 1235. The device
1205 may also include a processor. Each of these components may be in communication
with one another (e.g., via one or more buses).
[0175] The receiver 1210 may receive information such as packets, user data, or control
information associated with various information channels (e.g., control channels,
data channels, and information related to determining transmission configurations,
etc.). Information may be passed on to other components of the device 1205. The receiver
1210 may be an example of aspects of the transceiver 1420 described with reference
to FIG. 14. The receiver 1210 may utilize a single antenna or a set of antennas.
[0176] The communications manager 1215 may be an example of aspects of the communications
manager 1115 as described herein. The communications manager 1215 may include a transmission
configuration component 1220, a resource allocation designation component 1225, and
a control transmission component 1230. The communications manager 1215 may be an example
of aspects of the communications manager 1410 described herein.
[0177] The transmission configuration component 1220 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a UE, the transmission configuration
indicating a resource block group size and a bandwidth part size.
[0178] The resource allocation designation component 1225 may designate a first resource
allocation type for the transmission configuration instead of a second resource allocation
type for the transmission configuration for allocating resources to the carrier bandwidth
based on the bandwidth part size being less than or equal to a bandwidth part size
threshold and further based on the resource block group size.
[0179] The control transmission component 1230 may transmit, to the UE, downlink control
information indicating the first resource allocation type for the transmission configuration.
The transmission configuration component 1220 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a UE, the transmission configuration
indicating a bandwidth part size.
[0180] The resource allocation designation component 1225 may designate a first resource
allocation type for the transmission configuration instead of a second resource allocation
type for the transmission configuration for allocating resources to the carrier bandwidth
based on the bandwidth part size being less than or equal to a bandwidth part size
threshold. The control transmission component 1230 may transmit, to the UE, downlink
control information indicating the first resource allocation type for the transmission
configuration.
[0181] The transmitter 1235 may transmit signals generated by other components of the device
1205. In some examples, the transmitter 1235 may be collocated with a receiver 1210
in a transceiver module. For example, the transmitter 1235 may be an example of aspects
of the transceiver 1420 described with reference to FIG. 14. The transmitter 1235
may utilize a single antenna or a set of antennas.
[0182] FIG. 13 shows a block diagram 1300 of a communications manager 1305 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. The communications manager
1305 may be an example of aspects of a communications manager 1115, a communications
manager 1215, or a communications manager 1410 described herein. The communications
manager 1305 may include a transmission configuration component 1310, a resource allocation
designation component 1315, a control transmission component 1320, a receiving component
1325, and a data transmission component 1330. Each of these modules may communicate,
directly or indirectly, with one another (e.g., via one or more buses).
[0183] The transmission configuration component 1310 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a UE, the transmission configuration
indicating a resource block group size and a bandwidth part size. In some examples,
the transmission configuration component 1310 may identify a transmission configuration
for a carrier bandwidth allocated for communications with a UE, the transmission configuration
indicating a bandwidth part size. In some examples, the transmission configuration
component 1310 may determine a configuration type indicating the resource block group
size.
[0184] In some examples, the transmission configuration component 1310 may identify the
transmission configuration according to the second resource allocation type to indicate
the resource block group size and the bandwidth part size. In some examples, the transmission
configuration component 1310 may identify the resource block group size of a first
resource block group of the carrier bandwidth as a first value based on the second
resource allocation type.
[0185] In some examples, the transmission configuration component 1310 may identify the
resource block group size of a last resource block group of the carrier bandwidth
as a second value based on the second resource allocation type, where the first resource
block group and the last resource block group of the carrier bandwidth include a same
resource block group and where the first value and the second value are different.
In some examples, the transmission configuration component 1310 may identify the transmission
configuration according to the second resource allocation type to indicate the bandwidth
part size.
[0186] In some examples, the transmission configuration component 1310 may identify a resource
block group size of a first resource block group of the carrier bandwidth as a first
value based on the second resource allocation type. In some examples, the transmission
configuration component 1310 may identify a resource block group size of a last resource
block group of the carrier bandwidth as a second value based on the second resource
allocation type, where the first resource block group and the last resource block
group of the carrier bandwidth include a same resource block group and where the first
value and the second value are different.
[0187] The resource allocation designation component 1315 may designate a first resource
allocation type for the transmission configuration instead of a second resource allocation
type for the transmission configuration for allocating resources to the carrier bandwidth
based on the bandwidth part size being less than or equal to a bandwidth part size
threshold and further based on the resource block group size. In some examples, the
resource allocation designation component 1315 may designate a first resource allocation
type for the transmission configuration instead of a second resource allocation type
for the transmission configuration for allocating resources to the carrier bandwidth
based on the bandwidth part size being less than or equal to a bandwidth part size
threshold.
[0188] In some examples, the resource allocation designation component 1315 may determine
that the bandwidth part size is equal to one resource block and the resource block
group size is equal to two resource blocks, where the bandwidth part size threshold
is one resource block based on the resource block group size being equal to two resource
blocks. In some examples, the resource allocation designation component 1315 may determine
that the bandwidth part size is less than or equal to three resource blocks and the
resource block group size is equal to four resource blocks, where the bandwidth part
size threshold is three resource blocks based on the resource block group size being
equal to four resource blocks.
[0189] In some examples, the resource allocation designation component 1315 may designate
a type 1 resource allocation as the first resource allocation type for the transmission
configuration instead of a type 0 resource allocation as the second resource allocation
type for the transmission configuration. In some examples, the resource allocation
designation component 1315 may designate that the bandwidth part size is greater than
or equal to the resource block group size. In some examples, the resource allocation
designation component 1315 may determine that the bandwidth part size is equal to
one resource block.
[0190] In some examples, the resource allocation designation component 1315 may determine
that the bandwidth part size is less than or equal to three resource blocks. In some
examples, the resource allocation designation component 1315 may allocate resources
including contiguous physical resource blocks. In some examples, the resource allocation
designation component 1315 may designate a wideband precoding granularity as the first
resource allocation type for the transmission configuration over a two precoding granularity
and over a four precoding granularity as the second resource allocation type for the
transmission configuration.
[0191] The control transmission component 1320 may transmit, to the UE, downlink control
information indicating the first resource allocation type for the transmission configuration.
In some examples, the control transmission component 1320 may transmit, to the UE,
downlink control information indicating the first resource allocation type for the
transmission configuration. In some examples, the control transmission component 1320
may transmit the downlink control information indicating a resource block start parameter
and a number of resource blocks.
[0192] The receiving component 1325 may receive, from the UE, a transmission including resources
allocated according to the first resource allocation type. In some examples, the receiving
component 1325 may receive, from the UE, a transmission including resources allocated
according to the first resource allocation type.
[0193] The data transmission component 1330 may transmit, to the UE, a transmission including
resources allocated according to the first resource allocation type. In some examples,
the data transmission component 1330 may transmit, to the UE, a transmission including
resources allocated according to the first resource allocation type.
[0194] FIG. 14 shows a diagram of a system 1400 including a device 1405 that supports determining
transmission configurations for resource block groups and precoding resource block
groups in accordance with aspects of the present disclosure. The device 1405 may be
an example of or include the components of device 1105, device 1205, or a base station
105 as described herein. The device 1405 may include components for bi-directional
voice and data communications including components for transmitting and receiving
communications, including a communications manager 1410, a network communications
manager 1415, a transceiver 1420, an antenna 1425, memory 1430, a processor 1440,
and an inter-station communications manager 1445. These components may be in electronic
communication via one or more buses (e.g., bus 1455).
[0195] The communications manager 1410 may identify a transmission configuration for a carrier
bandwidth allocated for communications with a UE, the transmission configuration indicating
a resource block group size and a bandwidth part size, designate a first resource
allocation type for the transmission configuration instead of a second resource allocation
type for the transmission configuration for allocating resources to the carrier bandwidth
based on the bandwidth part size being less than or equal to a bandwidth part size
threshold and further based on the resource block group size, and transmit, to the
UE, downlink control information indicating the first resource allocation type for
the transmission configuration. The communications manager 1410 may also identify
a transmission configuration for a carrier bandwidth allocated for communications
with a UE, the transmission configuration indicating a bandwidth part size, designate
a first resource allocation type for the transmission configuration instead of a second
resource allocation type for the transmission configuration for allocating resources
to the carrier bandwidth based on the bandwidth part size being less than or equal
to a bandwidth part size threshold, and transmit, to the UE, downlink control information
indicating the first resource allocation type for the transmission configuration.
[0196] The network communications manager 1415 may manage communications with the core network
(e.g., via one or more wired backhaul links). For example, the network communications
manager 1415 may manage the transfer of data communications for client devices, such
as one or more UEs 115.
[0197] The transceiver 1420 may communicate bi-directionally, via one or more antennas,
wired, or wireless links as described herein. For example, the transceiver 1420 may
represent a wireless transceiver and may communicate bi-directionally with another
wireless transceiver. The transceiver 1420 may also include a modem to modulate the
packets and provide the modulated packets to the antennas for transmission, and to
demodulate packets received from the antennas.
[0198] In some cases, the wireless device may include a single antenna 1425. However, in
some cases the device may have more than one antenna 1425, which may be capable of
concurrently transmitting or receiving multiple wireless transmissions.
[0199] The memory 1430 may include RAM, ROM, or a combination thereof. The memory 1430 may
store computer-readable code 1435 including instructions that, when executed by a
processor (e.g., the processor 1440) cause the device to perform various functions
described herein. In some cases, the memory 1430 may contain, among other things,
a BIOS which may control basic hardware or software operation such as the interaction
with peripheral components or devices.
[0200] The processor 1440 may include an intelligent hardware device, (e.g., a general-purpose
processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic
device, a discrete gate or transistor logic component, a discrete hardware component,
or any combination thereof). In some cases, the processor 1440 may be configured to
operate a memory array using a memory controller. In some cases, a memory controller
may be integrated into processor 1440. The processor 1440 may be configured to execute
computer-readable instructions stored in a memory (e.g., the memory 1430) to cause
the device 1405 to perform various functions (e.g., functions or tasks supporting
determining transmission configurations).
[0201] The inter-station communications manager 1445 may manage communications with other
base station 105, and may include a controller or scheduler for controlling communications
with UEs 115 in cooperation with other base stations 105. For example, the inter-station
communications manager 1445 may coordinate scheduling for transmissions to UEs 115
for various interference mitigation techniques such as beamforming or joint transmission.
In some examples, the inter-station communications manager 1445 may provide an X2
interface within an LTE/LTE-A wireless communication network technology to provide
communication between base stations 105.
[0202] The code 1435 may include instructions to implement aspects of the present disclosure,
including instructions to support wireless communications. The code 1435 may be stored
in a non-transitory computer-readable medium such as system memory or other type of
memory. In some cases, the code 1435 may not be directly executable by the processor
1440 but may cause a computer (e.g., when compiled and executed) to perform functions
described herein.
[0203] FIG. 15 shows a flowchart illustrating a method 1500 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The operations of method 1500 may be implemented
by a base station 105 or its components as described herein. For example, the operations
of method 1500 may be performed by a communications manager as described with reference
to FIGs. 11 through 14. In some examples, a base station may execute a set of instructions
to control the functional elements of the base station to perform the functions described
herein. Additionally or alternatively, a base station may perform aspects of the functions
described herein using special-purpose hardware.
[0204] At 1505, the base station may identify a transmission configuration for a carrier
bandwidth allocated for communications with a UE, the transmission configuration indicating
a resource block group size and a bandwidth part size. The operations of 1505 may
be performed according to the methods described herein. In some examples, aspects
of the operations of 1505 may be performed by a transmission configuration component
as described with reference to FIGs. 11 through 14. Additionally or alternatively,
means for performing 1505 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0205] At 1510, the base station may designate a first resource allocation type for the
transmission configuration instead of a second resource allocation type for the transmission
configuration for allocating resources to the carrier bandwidth based on the bandwidth
part size being less than or equal to a bandwidth part size threshold and further
based on the resource block group size. The operations of 1510 may be performed according
to the methods described herein. In some examples, aspects of the operations of 1510
may be performed by a resource allocation designation component as described with
reference to FIGs. 11 through 14. Additionally or alternatively, means for performing
1510 may, but not necessarily, include, for example, antenna 925, transceiver 920,
communications manager 910, memory 930 (including code 935), processor 940 and/or
bus 955.
[0206] At 1515, the base station may transmit, to the UE, downlink control information indicating
the first resource allocation type for the transmission configuration. The operations
of 1515 may be performed according to the methods described herein. In some examples,
aspects of the operations of 1515 may be performed by a control transmission component
as described with reference to FIGs. 11 through 14. Additionally or alternatively,
means for performing 1515 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0207] FIG. 16 shows a flowchart illustrating a method 1600 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The operations of method 1600 may be implemented
by a UE 115 or base station 105 or its components as described herein. For example,
the operations of method 1600 may be performed by a communications manager as described
with reference to FIGs. 6 through 10. In some examples, a UE or base station may execute
a set of instructions to control the functional elements of the UE or base station
to perform the functions described herein. Additionally or alternatively, a UE or
base station may perform aspects of the functions described herein using special-purpose
hardware.
[0208] At 1605, the UE or base station may identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a resource block group size and a bandwidth part size. The operations of
1605 may be performed according to the methods described herein. In some examples,
aspects of the operations of 1605 may be performed by a transmission configuration
component as described with reference to FIGs. 6 through 10. Additionally or alternatively,
means for performing 1605 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0209] At 1610, the UE or base station may calculate a number of resource block groups for
the transmission configuration based on the resource block group size and the bandwidth
part size and according to a first resource allocation type. The operations of 1610
may be performed according to the methods described herein. In some examples, aspects
of the operations of 1610 may be performed by a calculation component as described
with reference to FIGs. 6 through 10. Additionally or alternatively, means for performing
1610 may, but not necessarily, include, for example, antenna 925, transceiver 920,
communications manager 910, memory 930 (including code 935), processor 940 and/or
bus 955.
[0210] At 1615, the UE or base station may designate the resource block group size for the
transmission configuration as equal to the bandwidth part size based on the calculated
number of resource block groups being equal to one. The operations of 1615 may be
performed according to the methods described herein. In some examples, aspects of
the operations of 1615 may be performed by a resource allocation designation component
as described with reference to FIGs. 6 through 10. Additionally or alternatively,
means for performing 1615 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0211] At 1620, the UE or base station may communicate with the second device using the
carrier bandwidth according to the transmission configuration. The operations of 1620
may be performed according to the methods described herein. In some examples, aspects
of the operations of 1620 may be performed by a communication component as described
with reference to FIGs. 6 through 10. Additionally or alternatively, means for performing
1620 may, but not necessarily, include, for example, antenna 925, transceiver 920,
communications manager 910, memory 930 (including code 935), processor 940 and/or
bus 955.
[0212] FIG. 17 shows a flowchart illustrating a method 1700 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The operations of method 1700 may be implemented
by a UE 115 or base station 105 or its components as described herein. For example,
the operations of method 1700 may be performed by a communications manager as described
with reference to FIGs. 6 through 10. In some examples, a UE or base station may execute
a set of instructions to control the functional elements of the UE or base station
to perform the functions described herein. Additionally or alternatively, a UE or
base station may perform aspects of the functions described herein using special-purpose
hardware.
[0213] At 1705, the UE or base station may identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a resource block group size and a bandwidth part size. The operations of
1705 may be performed according to the methods described herein. In some examples,
aspects of the operations of 1705 may be performed by a transmission configuration
component as described with reference to FIGs. 6 through 10. Additionally or alternatively,
means for performing 1705 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0214] At 1710, the UE or base station may determine whether a sum of the bandwidth part
size and a start bandwidth part of the carrier bandwidth modulo the resource block
group size is less than or equal to the resource block group size. The operations
of 1710 may be performed according to the methods described herein. In some examples,
aspects of the operations of 1710 may be performed by a calculation component as described
with reference to FIGs. 6 through 10. Additionally or alternatively, means for performing
1710 may, but not necessarily, include, for example, antenna 925, transceiver 920,
communications manager 910, memory 930 (including code 935), processor 940 and/or
bus 955.
[0215] At 1715, the UE or base station may designate the resource block group size for the
transmission configuration as equal to the bandwidth part size based on the determining.
The operations of 1715 may be performed according to the methods described herein.
In some examples, aspects of the operations of 1715 may be performed by a resource
allocation designation component as described with reference to FIGs. 6 through 10.
Additionally or alternatively, means for performing 1715 may, but not necessarily,
include, for example, antenna 925, transceiver 920, communications manager 910, memory
930 (including code 935), processor 940 and/or bus 955.
[0216] At 1720, the UE or base station may communicate with the second device using the
carrier bandwidth according to the transmission configuration. The operations of 1720
may be performed according to the methods described herein. In some examples, aspects
of the operations of 1720 may be performed by a communication component as described
with reference to FIGs. 6 through 10. Additionally or alternatively, means for performing
1720 may, but not necessarily, include, for example, antenna 925, transceiver 920,
communications manager 910, memory 930 (including code 935), processor 940 and/or
bus 955.
[0217] FIG. 18 shows a flowchart illustrating a method 1800 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The operations of method 1800 may be implemented
by a base station 105 or its components as described herein. For example, the operations
of method 1800 may be performed by a communications manager as described with reference
to FIGs. 11 through 14. In some examples, a base station may execute a set of instructions
to control the functional elements of the base station to perform the functions described
herein. Additionally or alternatively, a base station may perform aspects of the functions
described herein using special-purpose hardware.
[0218] At 1805, the base station may identify a transmission configuration for a carrier
bandwidth allocated for communications with a UE, the transmission configuration indicating
a bandwidth part size. The operations of 1805 may be performed according to the methods
described herein. In some examples, aspects of the operations of 1805 may be performed
by a transmission configuration component as described with reference to FIGs. 11
through 14. Additionally or alternatively, means for performing 1805 may, but not
necessarily, include, for example, antenna 925, transceiver 920, communications manager
910, memory 930 (including code 935), processor 940 and/or bus 955.
[0219] At 1810, the base station may designate a first resource allocation type for the
transmission configuration instead of a second resource allocation type for the transmission
configuration for allocating resources to the carrier bandwidth based on the bandwidth
part size being less than or equal to a bandwidth part size threshold. The operations
of 1810 may be performed according to the methods described herein. In some examples,
aspects of the operations of 1810 may be performed by a resource allocation designation
component as described with reference to FIGs. 11 through 14. Additionally or alternatively,
means for performing 1810 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0220] At 1815, the base station may transmit, to the UE, downlink control information indicating
the first resource allocation type for the transmission configuration. The operations
of 1815 may be performed according to the methods described herein. In some examples,
aspects of the operations of 1815 may be performed by a control transmission component
as described with reference to FIGs. 11 through 14. Additionally or alternatively,
means for performing 1815 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0221] FIG. 19 shows a flowchart illustrating a method 1900 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The operations of method 1900 may be implemented
by a UE 115 or base station 105 or its components as described herein. For example,
the operations of method 1900 may be performed by a communications manager as described
with reference to FIGs. 6 through 10. In some examples, a UE or base station may execute
a set of instructions to control the functional elements of the UE or base station
to perform the functions described herein. Additionally or alternatively, a UE or
base station may perform aspects of the functions described herein using special-purpose
hardware.
[0222] At 1905, the UE or base station may identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a precoding resource block group size and a bandwidth part size. The operations
of 1905 may be performed according to the methods described herein. In some examples,
aspects of the operations of 1905 may be performed by a transmission configuration
component as described with reference to FIGs. 6 through 10. Additionally or alternatively,
means for performing 1905 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0223] At 1910, the UE or base station may calculate a number of precoding resource block
groups for the transmission configuration based on the precoding resource block group
size and the bandwidth part size. The operations of 1910 may be performed according
to the methods described herein. In some examples, aspects of the operations of 1910
may be performed by a calculation component as described with reference to FIGs. 6
through 10. Additionally or alternatively, means for performing 1910 may, but not
necessarily, include, for example, antenna 925, transceiver 920, communications manager
910, memory 930 (including code 935), processor 940 and/or bus 955.
[0224] At 1915, the UE or base station may designate the precoding resource block group
size for the transmission configuration as equal to the bandwidth part size based
on the calculated number of precoding resource block groups being equal to one. The
operations of 1915 may be performed according to the methods described herein. In
some examples, aspects of the operations of 1915 may be performed by a resource allocation
designation component as described with reference to FIGs. 6 through 10. Additionally
or alternatively, means for performing 1915 may, but not necessarily, include, for
example, antenna 925, transceiver 920, communications manager 910, memory 930 (including
code 935), processor 940 and/or bus 955.
[0225] At 1920, the UE or base station may communicate with the second device using the
carrier bandwidth according to the transmission configuration. The operations of 1920
may be performed according to the methods described herein. In some examples, aspects
of the operations of 1920 may be performed by a communication component as described
with reference to FIGs. 6 through 10. Additionally or alternatively, means for performing
1920 may, but not necessarily, include, for example, antenna 925, transceiver 920,
communications manager 910, memory 930 (including code 935), processor 940 and/or
bus 955.
[0226] FIG. 20 shows a flowchart illustrating a method 2000 that supports determining transmission
configurations for resource block groups and precoding resource block groups in accordance
with aspects of the present disclosure. The operations of method 2000 may be implemented
by a UE 115 or base station 105 or its components as described herein. For example,
the operations of method 2000 may be performed by a communications manager as described
with reference to FIGs. 6 through 10. In some examples, a UE or base station may execute
a set of instructions to control the functional elements of the UE or base station
to perform the functions described herein. Additionally or alternatively, a UE or
base station may perform aspects of the functions described herein using special-purpose
hardware.
[0227] At 2005, the UE or base station may identify a transmission configuration for a carrier
bandwidth allocated for communications with a second device, the transmission configuration
indicating a precoding resource block group size and a bandwidth part size. The operations
of 2005 may be performed according to the methods described herein. In some examples,
aspects of the operations of 2005 may be performed by a transmission configuration
component as described with reference to FIGs. 6 through 10. Additionally or alternatively,
means for performing 2005 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0228] At 2010, the UE or base station may determine whether a sum of the bandwidth part
size and a start bandwidth part of the carrier bandwidth modulo the precoding resource
block group size is less than or equal to the precoding resource block group size.
The operations of 2010 may be performed according to the methods described herein.
In some examples, aspects of the operations of 2010 may be performed by a calculation
component as described with reference to FIGs. 6 through 10. Additionally or alternatively,
means for performing 2010 may, but not necessarily, include, for example, antenna
925, transceiver 920, communications manager 910, memory 930 (including code 935),
processor 940 and/or bus 955.
[0229] At 2015, the UE or base station may designate the precoding resource block group
size for the transmission configuration as equal to the bandwidth part size based
on the determining. The operations of 2015 may be performed according to the methods
described herein. In some examples, aspects of the operations of 2015 may be performed
by a resource allocation designation component as described with reference to FIGs.
6 through 10. Additionally or alternatively, means for performing 2015 may, but not
necessarily, include, for example, antenna 925, transceiver 920, communications manager
910, memory 930 (including code 935), processor 940 and/or bus 955.
[0230] At 2020, the UE or base station may communicate with the second device using the
carrier bandwidth according to the transmission configuration. The operations of 2020
may be performed according to the methods described herein. In some examples, aspects
of the operations of 2020 may be performed by a communication component as described
with reference to FIGs. 6 through 10. Additionally or alternatively, means for performing
2020 may, but not necessarily, include, for example, antenna 925, transceiver 920,
communications manager 910, memory 930 (including code 935), processor 940 and/or
bus 955.
[0231] It should be noted that the methods described herein describe possible implementations,
and that the operations and the steps may be rearranged or otherwise modified and
that other implementations are possible. Further, aspects from two or more of the
methods may be combined within the scope of the claims.
[0232] Techniques described herein may be used for various wireless communications systems
such as code division multiple access (CDMA), time division multiple access (TDMA),
frequency division multiple access (FDMA), orthogonal frequency division multiple
access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other
systems. A CDMA system may implement a radio technology such as CDMA2000, Universal
Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856)
is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA
includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system may implement
a radio technology such as Global System for Mobile Communications (GSM).
[0233] An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB),
Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11
(Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part
of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are
releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and
GSM are described in documents from the organization named "3rd Generation Partnership
Project" (3GPP). CDMA2000 and UMB are described in documents from an organization
named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein
may be used for the systems and radio technologies mentioned herein as well as other
systems and radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NR system
may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology
may be used in much of the description, the techniques described herein are applicable
beyond LTE, LTE-A, LTE-A Pro, or NR applications.
[0234] A macro cell generally covers a relatively large geographic area (e.g., several kilometers
in radius) and may allow unrestricted access by UEs with service subscriptions with
the network provider. A small cell may be associated with a lower-powered base station,
as compared with a macro cell, and a small cell may operate in the same or different
(e.g., licensed, unlicensed, etc.) frequency bands as macro cells. Small cells may
include pico cells, femto cells, and micro cells according to various examples. A
pico cell, for example, may cover a small geographic area and may allow unrestricted
access by UEs with service subscriptions with the network provider. A femto cell may
also cover a small geographic area (e.g., a home) and may provide restricted access
by UEs having an association with the femto cell (e.g., UEs in a closed subscriber
group (CSG), UEs for users in the home, and the like). An eNB for a macro cell may
be referred to as a macro eNB. An eNB for a small cell may be referred to as a small
cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or multiple
(e.g., two, three, four, and the like) cells, and may also support communications
using one or multiple component carriers.
[0235] The wireless communications systems described herein may support synchronous or asynchronous
operation. For synchronous operation, the base stations may have similar frame timing,
and transmissions from different base stations may be approximately aligned in time.
For asynchronous operation, the base stations may have different frame timing, and
transmissions from different base stations may not be aligned in time. The techniques
described herein may be used for either synchronous or asynchronous operations.
[0236] Information and signals described herein may be represented using any of a variety
of different technologies and techniques. For example, data, instructions, commands,
information, signals, bits, symbols, and chips that may be referenced throughout the
description may be represented by voltages, currents, electromagnetic waves, magnetic
fields or particles, optical fields or particles, or any combination thereof.
[0237] The various illustrative blocks and modules described in connection with the disclosure
herein may be implemented or performed with a general-purpose processor, a DSP, an
ASIC, an FPGA, or other programmable logic device, discrete gate or transistor logic,
discrete hardware components, or any combination thereof designed to perform the functions
described herein. A general-purpose processor may be a microprocessor, but in the
alternative, the processor may be any conventional processor, controller, microcontroller,
or state machine. A processor may also be implemented as a combination of computing
devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors,
one or more microprocessors in conjunction with a DSP core, or any other such configuration).
[0238] The functions described herein may be implemented in hardware, software executed
by a processor, firmware, or any combination thereof. If implemented in software executed
by a processor, the functions may be stored on or transmitted over as one or more
instructions or code on a computer-readable medium. Other examples and implementations
are within the scope of the disclosure and appended claims. For example, due to the
nature of software, functions described herein can be implemented using software executed
by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features
implementing functions may also be physically located at various positions, including
being distributed such that portions of functions are implemented at different physical
locations.
[0239] Computer-readable media includes both non-transitory computer storage media and communication
media including any medium that facilitates transfer of a computer program from one
place to another. A non-transitory storage medium may be any available medium that
can be accessed by a general purpose or special-purpose computer. By way of example,
and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically
erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical
disk storage, magnetic disk storage or other magnetic storage devices, or any other
non-transitory medium that can be used to carry or store desired program code means
in the form of instructions or data structures and that can be accessed by a general-purpose
or special-purpose computer, or a general-purpose or special-purpose processor. Also,
any connection is properly termed a computer-readable medium. For example, if the
software is transmitted from a website, server, or other remote source using a coaxial
cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless
technologies such as infrared, radio, and microwave, then the coaxial cable, fiber
optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio,
and microwave are included in the definition of medium. Disk and disc, as used herein,
include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and
Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce
data optically with lasers. Combinations of the above are also included within the
scope of computer-readable media.
[0240] As used herein, including in the claims, "or" as used in a list of items (e.g., a
list of items prefaced by a phrase such as "at least one of" or "one or more of")
indicates an inclusive list such that, for example, a list of at least one of A, B,
or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used
herein, the phrase "based on" shall not be construed as a reference to a closed set
of conditions. For example, an exemplary step that is described as "based on condition
A" may be based on both a condition A and a condition B without departing from the
scope of the present disclosure. In other words, as used herein, the phrase "based
on" shall be construed in the same manner as the phrase "based at least in part on."
[0241] In the appended figures, similar components or features may have the same reference
label. Further, various components of the same type may be distinguished by following
the reference label by a dash and a second label that distinguishes among the similar
components. If just the first reference label is used in the specification, the description
is applicable to any one of the similar components having the same first reference
label irrespective of the second reference label, or other subsequent reference label.
[0242] The description set forth herein, in connection with the appended drawings, describes
example configurations and does not represent all the examples that may be implemented
or that are within the scope of the claims. The term "exemplary" used herein means
"serving as an example, instance, or illustration," and not "preferred" or "advantageous
over other examples." The detailed description includes specific details for the purpose
of providing an understanding of the described techniques. These techniques, however,
may be practiced without these specific details. In some instances, well-known structures
and devices are shown in block diagram form in order to avoid obscuring the concepts
of the described examples.
[0243] The description herein is provided to enable a person skilled in the art to make
or use the disclosure. Various modifications to the disclosure will be readily apparent
to those skilled in the art, and the generic principles defined herein may be applied
to other variations without departing from the scope of the disclosure. Thus, the
disclosure is not limited to the examples and designs described herein, but is to
be accorded the broadest scope consistent with the scope of the claims.