(19)
(11)EP 3 053 406 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
29.04.2020 Bulletin 2020/18

(21)Application number: 14847321.8

(22)Date of filing:  08.09.2014
(51)International Patent Classification (IPC): 
H04W 88/08(2009.01)
H04L 5/00(2006.01)
H04W 72/00(2009.01)
(86)International application number:
PCT/US2014/054586
(87)International publication number:
WO 2015/047708 (02.04.2015 Gazette  2015/13)

(54)

FILTER-BASED GUARDBAND DETERMINATION AND SUBCARRIER SELECTION

FILTERBASIERTE SICHERHEITSFREQUENZBANDBESTIMMUNG UND UNTERTRÄGERAUSWAHL

DÉTERMINATION DE BANDE DE GARDE ET SÉLECTION DE SOUS-PORTEUSE BASÉES SUR UN FILTRAGE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 30.09.2013 US 201314042510

(43)Date of publication of application:
10.08.2016 Bulletin 2016/32

(73)Proprietor: T-Mobile USA, Inc.
Bellevue, WA 98006-1350 (US)

(72)Inventors:
  • OLSEN, Brian Allan
    Bellevue, WA 98006-1350 (US)
  • TAPIA, Pablo
    Bellevue, WA 98006-1350 (US)

(74)Representative: Grünecker Patent- und Rechtsanwälte PartG mbB 
Leopoldstraße 4
80802 München
80802 München (DE)


(56)References cited: : 
WO-A1-2013/133758
US-A1- 2008 240 028
US-A1- 2011 129 047
US-B2- 8 223 700
WO-A2-2007/055647
US-A1- 2011 129 047
US-B2- 7 944 995
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    BACKGROUND



    [0001] Mobile devices engage in wireless communication over radio frequency (RF) spectrums known as channels. When initiating a wireless connection with a base station of a telecommunication network, the mobile device may listen at a given channel for downlink communications. As used herein, a downlink communication is a transmission from a base station to a mobile device. The mobile device may also receive an assignment of a subcarrier from the base station. The subcarrier is a part of a channel. For example, if a channel comprises an RF spectrum, the subcarrier is a part of that spectrum allocated for uplink communications of the mobile device. As used herein, an uplink communication is a transmission from a mobile device to a base station.

    [0002] Both mobile devices and base stations incorporate filters in their radios to prevent interference with other channels. Different types of filters have different limitations, some with sharper roll-offs than others. In general, the sharper the roll-off of a filter, the less likely it will be that transmissions from a radio with that filter will interfere with an adjacent channel. Adjacent channel interference is also dealt with through the use of guardbands. Guardbands are reserved parts of an RF spectrum comprising a channel at each end of that RF spectrum. Base stations will not use or assign carriers or subcarriers in the guardbands. Thus, even when a mobile device or base station has a poor roll-off, no adjacent channel interference will occur. As filters continue to improve, however, the size of the guardbands may be needlessly large, resulting in underutilized RF spectrum and artificial congestion.

    [0003] WO 2013/133758 A1 discloses a first node which comprises an obtaining circuit configured to obtain information from a second node or a third node in a wireless communications network, the information being related to the guard band used or required in the radio spectrum used by the second node. The first node also comprises an adapting circuit configured to adapt one or more procedures related to the radio operation within the wireless communications network, based on the obtained guard band information. In some embodiments, the guard band may comprise an unused spectrum or a spectrum with restricted operation.

    [0004] It is the object of the present invention to provide an improved method and system for guardbant determination and subcarrier selection.

    [0005] The object is achieved by the subject matter of the independent claims.

    [0006] Embodiments are defined by the dependent claims.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0007] The detailed description is set forth with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The use of the same reference numbers in different figures indicates similar or identical items or features.

    FIG. 1 illustrates an example environment including multiple mobile devices communicating with multiple base stations. The mobile devices and base stations utilize varying filters and are, accordingly, associated with different guardbands.

    FIG. 2 illustrates a component level view of a telecommunication device.

    FIG. 3 illustrates a component level view of a base station equipped with a guardband determination module that determines a guardband based on a filter roll-off or filter type and a scheduler that selects a subcarrier in accordance with that determination.

    FIG. 4 illustrates an example process performed by a base station, the process including determining a guardband for a frequency channel based on a roll-off or type of filter of the base station and selecting a subcarrier based at least in part on the determined guardband.

    FIG. 5 illustrates an example process performed by a base station, the process including determining a guardband for a frequency channel based on a roll-off or type of filter of a mobile device, selecting a subcarrier based at least in part on the determined guardband, and instructing the mobile device to use the subcarrier.

    FIG. 6 illustrates an example process performed by a mobile device, the process including providing an indication of a roll-off or type of filter of the mobile device to a base station and receiving, from the base station, instructions to utilize a subcarrier.


    DETAILED DESCRIPTION


    Overview



    [0008] The invention is described in the claims. The embodiments which do not fall within the scope of the claims are to be interpreted as examples useful for understanding the invention.

    [0009] This disclosure describes, in part, techniques for determining a guardband for a frequency channel based at least in part on a roll-off of a filter or a type of a filter. For example, a base station configured to implement the techniques may determine guardband for a frequency channel used for transmissions from the base station to a mobile device based at least in part on the roll-off or filter type of a filter of the base station. Further, the base station configured to implement the techniques may determine guardband for a frequency channel used for transmissions from a mobile device to the base station based at least in part on the roll-off or filter type of the filter of the mobile device. In some embodiments, each guardband may be specific to a mobile device, and the base station may determine two different guardbands for two different mobile devices with differing roll-offs or filter types for their filters. Upon determining a guardband, the base station may select a subcarrier based at least in part on the determined guardband. For example, the base station may select a subcarrier for transmissions from a mobile device to the base station based at least in part on the guardband determined for that mobile device. Upon selecting a subcarrier, the base station may instruct the mobile device to use the selected subcarrier.

    [0010] In various embodiments, a mobile device may be configured to determine the roll-off or filter type of its filter and to provide an indication of that roll-off or filter type to a base station. The mobile device may also be configured to receive instructions from the base station, such as instructions to listen on a certain spectrum for a frequency channel or instructions to use a specific subcarrier for transmissions from the mobile device to the base station.

    Example Environment



    [0011] FIG. 1 illustrates an example environment including multiple mobile devices communicating with multiple base stations. The mobile devices and base stations utilize varying filters and are, accordingly, associated with different guardbands. As illustrated, mobile devices 102-106 may communicate with base stations 108-110 of a wireless network, such as a telecommunication network. The mobile devices 102-106 have different radio filters 112-114, and the base stations 108-110 also have different radio filters 116-118. The base stations 108-110 determine different guardbands respectively associated with the different radio filters and apply each of those guardbands to either an uplink channel 120 or a downlink channel 122. The base stations 108-110 then select subcarriers or portions of RF spectrum in a channel 120-122 based on the determined guardbands.

    [0012] In various embodiments, the mobile devices 102, 104, and 106 may each be any sort device capable of cellular or wireless network communication, such as a cellular phone, a tablet computer, a personal digital assistant (PDA), a personal computer (PC), a laptop computer, a media center, a work station, etc. The mobile devices 102, 104, and 106 may each be associated with a subscription to telecommunication services of a network operator of a telecommunication network associated with the base stations 108 and 110. Each of the mobile devices 102, 104, and 106 may have one or more radios, each radio equipped with a radio filter such as radio filter A 112 or radio filter B 114, the radios being used for wirelessly sending communications to and receiving communications from the base stations 108-110. An example mobile device 102-106 is illustrated in FIG. 2 and described below with reference to that figure.

    [0013] In various embodiments, the base stations 108 and 110 may each be or include a server or server farm, multiple, distributed server farms, a mainframe, a work station, a personal computer (PC), a laptop computer, a tablet computer, an embedded system, or any other sort of device or devices. The base stations 108 and 110 may be any sort of base stations of a wireless network or telecommunication network, such as base stations, nodeBs, eNodeBs, or other access points. Each base station 108 and 110 may have one or more radios, each radio equipped with a radio filter such as radio filter X 116 or radio filter Y 118, the radios being used for wirelessly sending and receiving communications from mobile devices 102-106. The base stations may also be connected to core network components of a telecommunication network. An example base station 108-110 is illustrated in FIG. 3 and is described in greater detail below with reference to that figure.

    [0014] In some embodiments, filter A 112 and filter B 114 are radio filters of mobile devices 102-106. Filter A 112 and filter B 114 may each be used to transmit RF communications over the subcarrier assigned to their respective mobile device 102, 104, or 106 by filtering out other parts of the spectrum of the channel on which the radio of the mobile device 102, 104, or 106 is transmitting. Further, filter A 112 and filter B 114 may each be an adjacent channel interference filter designed to reduce interference with adjacent channels. Such a filter may have a sharp roll-off.

    [0015] In some embodiments, filter X 116 and filter Y 118 are respectively radio filters of base stations 108 and 110. Filter X 116 and filter Y 118 may each be used to transmit RF communications over the subcarrier or part of spectrum selected by their respective base stations 108 and 110 by filtering out other parts of the spectrum of the channel on which the radio of the base stations 108 and 110 is transmitting. Further, filter X 116 and filter Y 118 may each be an adjacent channel interference filter designed to reduce interference with adjacent channels. Such a filter may have a sharp roll-off.

    [0016] In various embodiments, uplink channel 120 is a RF spectrum used by mobile devices 102-106 for transmissions from the mobile devices 102-106 to the base stations 108-110. Downlink channel 122 is an RF spectrum used by the base stations 108-110 for transmissions from the base stations 108-110 to the mobile devices 102-106. Both the uplink channel 120 and the downlink channel 122 may be super high frequency channels in the range of 3 GHz to 30 GHz. In other embodiments, either or both of the uplink channel 120 or the downlink channel 122 may occupy part of a different frequency range.

    [0017] FIG. 1 illustrates each of the uplink channel 120 and the downlink channel 122 as a straight line divided into three sections. The two outer sections are guardbands, defined by a guardband mask, and the central portion is a part of the channel available for subcarrier selection. In some embodiments, either or both of the base stations 108 or 110 may maintain a default guardband for a channel. The default guardband may be applied to the channel by a guardband mask when a filter type or roll-off is unavailable. For example, if the channel is a 20 MHz channel, the base station 108 or 110 may maintain default guardbands of 1MHz each and a central, available portion of 18 MHz.

    [0018] As illustrated in FIG. 1, the mobile device 102 is wirelessly connected to the base station 108 using uplink channel 120 to transmit communications to the base station 108 and downlink channel 122 to receive communications from the base station 108. The mobile device 102 may provide an indication of the type or roll-off of its radio filter A 112 to the base station 108. For example, the mobile device 102 may provide the indication in a specific field of a registration or connection message. Upon receiving the indication, the base station 108 may determine a guardband 124 to apply to the uplink channel 120 for the mobile device 102. In some embodiments, determining the guardband 124 may involve comparing the filter type or roll-off to one or more criteria or proportioning the guardband 124 based on the roll-off. The base station 108 then adjusts the guardband mask based on the comparing or proportioning. After adjusting the guardband mask, the base station 108 utilizes the guardband mask to determine an available part of the uplink channel 120 and a scheduler of the base station 108 selects a subcarrier 126 for the mobile device 102 within the available portion. The base station 108 then instructs the mobile device 102 to utilize the subcarrier 126 for transmissions over the uplink channel 120.

    [0019] For the downlink channel 122 connecting the base station 108 to the mobile device 102, the base station 108 may determine the type or roll-off of the radio filter X 116 of the base station 108 and determine a guardband 128 for the downlink channel 122 based on the type of filter or roll-off. In some embodiments, the determined guardband 128 is not specific to mobile device 104 but, rather, is applicable to all connections over the downlink channel 122 between the base station 108 and mobile devices, such as mobile devices 102 and 104. In some embodiments, determining the guardband 128 may involve comparing the filter type or roll-off to one or more criteria or proportioning the guardband 128 based on the roll-off. The base station 108 then adjusts the guardband mask based on the comparing or proportioning. After adjusting the guardband mask, the base station 108 utilizes the guardband mask to determine an available part of the downlink channel 122 and selects a subcarrier 130/part of the available spectrum for the mobile device 102 within the available portion. The base station may 108 also determine subcarriers or parts of available spectrum to use for other mobile devices as well. For example, the base station 108 utilizes the guardband mask to determine an available part of the downlink channel 122 and selects a subcarrier 132/part of the available spectrum for the mobile device 104 within the available portion. The base station then uses the subcarriers 130-132/parts of spectrum for transmissions to the mobile devices 102 and 104.

    [0020] In various embodiments, the mobile device 104 is wirelessly connected to the base station 108 using uplink channel 120 to transmit communications to the base station 108 and downlink channel 122 to receive communications from the base station 108. The mobile device 104 may provide an indication of the type or roll-off of its radio filter B 114 to the base station 108. For example, the mobile device 104 may provide the indication in a specific field of a registration or connection message. Upon receiving the indication, the base station 108 may determine a guardband 134 to apply to the uplink channel 120 for the mobile device 104. In some embodiments, determining the guardband 134 may involve comparing the filter type or roll-off to one or more criteria or proportioning the guardband 134 based on the roll-off. The base station 108 then adjusts the guardband mask based on the comparing or proportioning. After adjusting the guardband mask, the base station 108 utilizes the guardband mask to determine an available part of the uplink channel 120 and a scheduler of the base station 108 selects a subcarrier 136 for the mobile device 104 within the available portion. The base station 108 then instructs the mobile device 104 to utilize the subcarrier 136 for transmissions over the uplink channel 120.

    [0021] Because the roll-off or filter type of radio filter B 114 may differ from that of radio filter A 112, the guardband 134 may be larger or smaller than the guardband 124. For example, radio filter A 112 may have a sharper roll-off than radio filter B 114, and based on that sharper roll-off the base station may determine a smaller guardband 124 for the mobile device 102 and its radio filter A 112 (e.g., a guardband 124 of .5 MHz) and a slightly larger guardband 134 for mobile device 104 and its radio filter B 114 (e.g., a guardband 134 of .75 MHz). Because the guardbands 124 and 134 differ, the base station 108 may select a subcarrier for a mobile device (e.g., subcarrier 126 for mobile device 102) that is not in the guardband for that mobile device but which may be in the guardband for a different mobile device. Continuing with the previous example, if guardband 124 is .5 MHz and guardband 134 is .75 MHz, the subcarrier 126 may be assigned between the boundary of the .5 MHz guardband 124 and the boundary of the .75 MHz guardband 134. In other embodiments, different radio filters 112-114 may be associated with a same guardband if their different roll-offs are both less than or more than a threshold or if their different filter types belong to a same category.

    [0022] As illustrated in FIG. 1, the mobile device 106 may have a radio filter A 112 with the same roll-off or type as the radio filter A 112 of mobile device 102. Consequently, when mobile device 106 provides an indication of the roll-off or type of its radio filter A 112 to the base station 110, the base station 110 determines a same guardband 124 as base station 108 determined for mobile device 102. Base stations 108-110 may determine this same guardband 124 because they may be applying a common policy of a network operator of the telecommunication network with which they are associated. Because mobile devices 102 and 106 will be transmitting on a same uplink channel 120, however, the scheduler of the base station 110 will select a different subcarrier 138 than the subcarrier 126 selected for mobile device 102 by the scheduler of base station 108. The base station 110 then instructs the mobile device 106 to utilize the subcarrier 138.

    [0023] In various embodiments, for the downlink channel 122 connecting the base station 110 to the mobile device 106, the base station 110 may determine the type or roll-off of the radio filter Y 118 of the base station 110 and determine a guardband 140 for the downlink channel 122 based on the type of filter or roll-off. In some embodiments, the determined guardband 140 is not specific to mobile device 106 but, rather, is applicable to all connections over the downlink channel 122 between the base station 110 and mobile devices, such as mobile device 106. In some embodiments, determining the guardband 140 may involve comparing the filter type or roll-off to one or more criteria or proportioning the guardband 140 based on the roll-off. The base station 110 then adjusts the guardband mask based on the comparing or proportioning. After adjusting the guardband mask, the base station 110 utilizes the guardband mask to determine an available part of the downlink channel 122 and selects a subcarrier 142/part of the available spectrum for the mobile device 106 within the available portion. The base station may 110 also determines subcarriers or parts of available spectrum to use for other mobile devices as well. The base station then uses the subcarrier 142/part of available spectrum for transmissions to the mobile device 106.

    [0024] Because the roll-off or filter type of radio filter Y 118 may differ from that of radio filter X 116, the guardband 140 may be larger or smaller than the guardband 128. For example, radio filter X 116 may have a sharper roll-off than radio filter Y 118, and based on that sharper roll-off the base station 108 may determine a smaller guardband 128 itself and its radio filter X 116 (e.g., a guardband 128 of .4 MHz) and base station 110 may determine a slightly larger guardband 140 for itself and its radio filter Y 118 (e.g., a guardband 140 of .6 MHz). Because the guardbands 128 and 140 differ, the base station 108 may select a subcarrier or part of spectrum (e.g., subcarrier 130) that is not in the guardband for base station 108 but which may be in the guardband for a different base station with a different radio filter. Continuing with the previous example, if guardband 128 is .4 MHz and guardband 140 is .6 MHz, the subcarrier 128 may be assigned between the boundary of the .4 MHz guardband 128 and the boundary of the .6 MHz guardband 140. In other embodiments, different radio filters 116-118 may be associated with a same guardband if their different roll-offs are both less than or more than a threshold or if their different filter types belong to a same category.

    Example Mobile Device



    [0025] FIG. 2 illustrates a component level view of a mobile device. As illustrated, the mobile device 202 comprises a system memory 204 storing modules and data 206. Also, the mobile device 202 includes processor(s) 208, a removable storage 210, a non-removable storage 212, a radio 214, a filter 216 for the radio 214, output device(s) 218, and input device(s) 220.

    [0026] In various embodiments, system memory 204 is volatile (such as RAM), non-volatile (such as ROM, flash memory, etc.) or some combination of the two. The modules or data 206 stored in the system memory 204 may comprise any sort of applications or platform components of the mobile device 202, as well as data associated with such applications or platform components.

    [0027] For example, the modules or data 206 may include one or more modules that, when executed, determine a roll-off or filter type for the filter 216 and provide an indication of that roll-off or filter type to a base station, such as a base station 108 or 110. The one or more modules may provide the indication, for instance, in a specific field of a registration or connection message. The one or more modules may also, when executed, receive or retrieve instructions from a base station. Such instructions may include instructions to listen to a specified frequency range of a channel, such as the downlink channel 122. The specified frequency range may be included in the instructions and may be based on a guardband 128 or 140. Also or instead, the instructions may specify a subcarrier to use when transmitting on an uplink channel 120, such as one of the subcarriers 126, 136, or 138. Upon receiving the instructions, the one or more modules may perform the instructions (e.g., by listening to the frequency range of the channel or by utilizing the subcarrier). In some embodiments, the one or more modules may be part of or associated with a radio interface layer (RIL), which may be an RIL of a network stack and may service as an interface to the radio 214.

    [0028] In some embodiments, the processor(s) 208 is a central processing unit (CPU), a graphics processing unit (GPU), or both CPU and GPU, or any other sort of processing unit.

    [0029] Mobile device 202 also includes additional data storage devices (removable and/or non-removable) such as, for example, magnetic disks, optical disks, or tape. Such additional storage is illustrated in FIG. 2 by removable storage 210 and non-removable storage 212. Tangible computer-readable media may include volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. System memory 204, removable storage 210, and non-removable storage 212 are all examples of computer-readable storage media. Computer-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by the mobile device 202. Any such tangible computer-readable media may be part of the mobile device 202.

    [0030] In some embodiments, the radio 214 includes any sort of radio known in the art. For example, radio 214 may include a radio transceiver that performs the function of transmitting and receiving RF communications via an antenna. The radio 214 may facilitate wireless connectivity between the mobile device 202 and various cell towers, base stations and/or access points, such as base station 106 or 134.

    [0031] As shown in FIG. 2, the radio 214 may be associated with a filter 216. The filter 216 may be used by the radio to transmit RF communications over the subcarrier assigned to the mobile device 202 by filtering out other parts of the spectrum of the channel on which the radio 212 is transmitting. Further, the filter 216 may be an adjacent channel interference filter designed to reduce interference with adjacent channels. Such a filter may have a sharp roll-off.

    [0032] In addition to radio 214, the mobile device 202 may also include a wireless communication transceiver and a near field antenna for communicating over unlicensed wireless Internet Protocol (IP) networks, such as local wireless data networks and personal area networks (e.g., Bluetooth or near field communication (NFC) networks).

    [0033] In some embodiments, the output devices 218 include any sort of output devices known in the art, such as a display (e.g., a liquid crystal display), speakers, a vibrating mechanism, or a tactile feedback mechanism. Output devices 218 also include ports for one or more peripheral devices, such as headphones, peripheral speakers, or a peripheral display.

    [0034] In various embodiments, input devices 220 include any sort of input devices known in the art. For example, input devices 220 may include a camera, a microphone, a keyboard/keypad, or a touch-sensitive display. A keyboard/keypad may be a push button numeric dialing pad (such as on a typical telecommunication device), a multi-key keyboard (such as a conventional QWERTY keyboard), or one or more other types of keys or buttons, and may also include a joystick-like controller and/or designated navigation buttons, or the like.

    Example Base Station



    [0035] FIG. 3 illustrates a component level view of a base station equipped with a guardband determination module that determines a guardband based on a filter roll-off or filter type and a scheduler that selects a subcarrier in accordance with that determination. As illustrated, the base station 302 comprises a system memory 304, processor(s) 306, a removable storage 308, a non-removable storage 310, a radio 312, a filter 314 associated with the radio 312, output device(s) 316, and input device(s) 318. The system memory 304 stores a schedule 320, which includes a guardband determination module 322, and other modules and data 324.

    [0036] In various embodiments, system memory 302 is volatile (such as RAM), non-volatile (such as ROM, flash memory, etc.) or some combination of the two.

    [0037] The application controller 128 is described above in detail with regard to FIG. 1. The other modules or data 304 stored in the system memory 302 may comprise any sort of applications or platform components of the network proxy device 124, as well as data associated with such applications or platform components.

    [0038] In some embodiments, the processor(s) 306 is a central processing unit (CPU), a graphics processing unit (GPU), or both CPU and GPU, or any other sort of processing unit.

    [0039] Base station 302 also includes additional data storage devices (removable and/or non-removable) such as, for example, magnetic disks, optical disks, or tape. Such additional storage is illustrated in FIG. 3 by removable storage 308 and non-removable storage 310. Tangible computer-readable media may include volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. System memory 302, removable storage 308 and non-removable storage 310 are all examples of computer-readable storage media. Computer-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by the base station 302. Any such tangible computer-readable media may be part of the base station 302.

    [0040] In some embodiments, the transceivers 312 include any sort of transceivers known in the art. For example, transceivers 312 may include a radio transceiver that performs the function of transmitting and receiving radio frequency communications via an antenna. The radio 212 may facilitate wireless connectivity between the network proxy device 124 and various nodes of the telecommunication network 120 or between the network proxy device 124 and routers or other devices of the Internet 126.

    [0041] In some embodiments, the radio 312 includes any sort of radio known in the art. For example, radio 312 may include a radio transceiver that performs the function of transmitting and receiving RF communications via an antenna. The radio 312 may facilitate wireless connectivity between the base station 302 and various mobile devices, such as mobile devices 102, 110, or 132.

    [0042] As shown in FIG. 3, the radio 312 may be associated with a filter 314. The filter 314 may be used by the radio to transmit RF communications over a part of the spectrum utilized by the base station 302 to transmit RF communications to a mobile device by filtering out other parts of the spectrum of the channel on which the radio 312 is transmitting. Further, the filter 314 may be an adjacent channel interference filter designed to reduce interference with adjacent channels. Such a filter may have a sharp roll-off.

    [0043] In addition to radio 312, the base station 302 may also include a wireless communication transceiver and a near field antenna for communicating over unlicensed wireless Internet Protocol (IP) networks, such as local wireless data networks and personal area networks (e.g., Bluetooth or near field communication (NFC) networks).

    [0044] In some embodiments, the output devices 316 include any sort of output devices known in the art, such as a display (e.g., a liquid crystal display), speakers, a vibrating mechanism, or a tactile feedback mechanism. Output devices 316 also include ports for one or more peripheral devices, such as headphones, peripheral speakers, or a peripheral display.

    [0045] In various embodiments, input devices 318 include any sort of input devices known in the art. For example, input devices 318 may include a camera, a microphone, a keyboard/keypad, or a touch-sensitive display. A keyboard/keypad may be a push button numeric dialing pad (such as on a typical telecommunication device), a multi-key keyboard (such as a conventional QWERTY keyboard), or one or more other types of keys or buttons, and may also include a joystick-like controller and/or designated navigation buttons, or the like.

    [0046] In various embodiments, the scheduler 320 stored in memory 304 may be any sort of scheduler of a base station that selects subcarriers or parts of spectrum for use by the base station 302 or a mobile device. The scheduler 320 may either check a guardband setting or utilize a guardband mask. The guardband setting or guardband mask may be specific to a channel and filter 216 (e.g., downlink channel 122) or may even be specific to a mobile device. The scheduler 320 applies the guardband setting or guardband mask to determine an available part of the channel and then selects a subcarrier or part of spectrum in the available part of the channel. If the selected subcarrier is a subcarrier for an uplink channel, then the scheduler or another component of the base station 302 may notify the mobile device of the subcarrier that the mobile device is to utilize. In some embodiments, the scheduler 320 may also utilize the guardband setting or guardband mask to determine a frequency range for a downlink channel and may instruct a mobile device to listen to that frequency range for communications from the base station 302. In further embodiments, the scheduler 320 may also automatically reassign a mobile device to a different subcarrier based on new connections to additional mobile devices or loss of connection with other mobile device(s).

    [0047] As shown in FIG. 3, the guardband determination module 322 may be a component of the scheduler 320. In other embodiments, the guardband determination module 322 may be a separate module from the scheduler 320. The guardband determination module 322 is configured to determine a roll-off or a filter type of the filter 314. Upon determining the roll-off or filter type, the guardband determination module 322 may compare the roll-off or filter type to one or more criteria. Such criteria may be specified by a policy of a network operator associated with the base station 302 or by a telecommunication standard. The criteria may include, for example, a roll-off threshold or categories of filter types and associated guardbands. The guardband determination module 322 then determines a guardband for a downlink channel, such as downlink channel 122, based on the comparison of the roll-off or filter type of the filter 314 to the criteria. For example, the criteria may specify that the guardband is to be proportioned to the roll-off, and the guardband determination module 322 may determine the guardband based on that criteria and the roll-off. After determining the guardband for the downlink channel, the base station 302 sets a guardband setting or modifies a guardband mask for use by the scheduler 320. In some embodiments, the base station 302 may communicate on different downlink channels and may determine corresponding, different guardbands for the different channels. Alternatively or additionally, the base station 302 may have additional radio and filters based radio 312 and filter 314 and may determine a guardband for each combination of a filter and a downlink channel.

    [0048] In various embodiments, the guardband determination module 322 also determines guardbands for uplink channels, and may determine a guardband for each mobile device communicating over a given uplink channel. The guardband determination module 322 may receive or retrieve an indication of a roll-off or filter type of a filter of a mobile device (e.g., in a specific field of a registration or connection message). Upon receiving or retrieving the indication, the guardband determination module 322 may compare the roll-off or filter type to one or more criteria. Such criteria may be specified by a policy of a network operator associated with the base station 302 or by a telecommunication standard. The criteria may include, for example, a roll-off threshold or categories of filter types and associated guardbands. The guardband determination module 322 then determines a guardband for a combination of an uplink channel, such as uplink channel 120, and a mobile device, such as mobile device 102, based on the comparison of the roll-off or filter type of the filter of that mobile device to the criteria. For example, the criteria may specify that the guardband is to be proportioned to the roll-off, and the guardband determination module 322 may determine the guardband based on that criteria and the roll-off. After determining the guardband for the combination of uplink channel and mobile device, the base station 302 sets a guardband setting or modifies a guardband mask for use by the scheduler 320. The guardband setting or guardband mask may be specific to the mobile device for which the guardband was determined.

    [0049] The other modules or data 324 stored in the system memory 304 may comprise any sort of applications or platform components of the base station 302, as well as data associated with such applications or platform components.

    Example Processes



    [0050] FIGs. 4-6 illustrate example processes. These processes are illustrated as logical flow graphs, each operation of which represents a sequence of operations that can be implemented in hardware, software, or a combination thereof. In the context of software, the operations represent computer-executable instructions stored on one or more computer-readable storage media that, when executed by one or more processors, perform the recited operations. Generally, computer-executable instructions include routines, programs, objects, components, data structures, and the like that perform particular functions or implement particular abstract data types. The order in which the operations are described is not intended to be construed as a limitation, and any number of the described operations can be combined in any order and/or in parallel to implement the processes.

    [0051] FIG. 4 illustrates an example process performed by a base station, the process including determining a guardband for a frequency channel based on a roll-off or type of filter of the base station and selecting a subcarrier based at least in part on the determined guardband. The process includes, at 402, determining, by a base station, a roll-off of a filter of the base station or a type of the filter.

    [0052] At 404, the base station then determines a guardband for a frequency channel based at least in part on the roll-off or the type of the filter. This determination may involve determining whether the filter roll-off or the filter type meets one or more criteria. Such criteria may be specified by a policy of the telecommunication network or by a telecommunication standard. Also, the size of the determined guardband may be proportional to the magnitude of the roll-off.

    [0053] At 406, the base station selects a subcarrier for transmissions from the base station to a mobile device based at least in part on the determined guardband for the frequency channel. No subcarriers are selected in the guardband portion of a channel although, in some embodiments, the selected subcarrier may be associated with a part of spectrum maintained as a guardband in the absence of a filter roll-off or a filter type meeting the one or more criteria. The selecting at 406 may include, at 408, determining a portion of a channel to be available for subcarrier selection based at least in part on the determined guardband and, at 410, selecting a subcarrier within the available portion of the channel.

    [0054] At 412, the base station may receive, from a mobile device, an indication of a roll-off of a filter of the mobile device or a type of the filter of the mobile device. At 414, the base station may determine whether the roll-off of the filter of the mobile device or the type of the filter of the mobile device meets one or more criteria and determine a guardband accordingly. At 416, the base station instructs the mobile device to utilize a subcarrier for transmissions from the mobile device to the base station based at least on the determined guardband. In some embodiments, the operations shown at blocks 412-416 may occur prior to, concurrently with, or after the operations shown at blocks 402-410.

    [0055] FIG. 5 illustrates an example process performed by a base station, the process including determining a guardband for a frequency channel based on a roll-off or type of filter of a mobile device, selecting a subcarrier based at least in part on the determined guardband, and instructing the mobile device to use the subcarrier. The process includes, at 502, maintaining, by a base station, a default guardband used for a mobile device when either or both of a roll-off or a type of filter of that mobile device is unavailable.

    [0056] At 504, the base station receives from a mobile device, an indication of a roll-off of a filter of the mobile device or a type of the filter. The receiving the indication at 504 may comprise, at 506, receiving the indication in a specific field of a registration or connection message from the mobile device to the base station.

    [0057] At 508, the base station determines a guardband for a frequency channel based at least in part on the roll-off or the type of the filter of the mobile device. This determination may involve determining whether the filter roll-off or the filter type of the mobile device meets one or more criteria. Such criteria may be specified by a policy of the telecommunication network or by a telecommunication standard. Also, the size of the determined guardband may be proportional to the magnitude of the roll-off.

    [0058] At 510, the base station selects a subcarrier for transmissions from the mobile device to the base station based at least in part on the determined guardband for the frequency channel. No subcarriers are selected in the guardband portion of a channel although, in some embodiments, the selected subcarrier may be associated with a part of spectrum maintained as a guardband in the absence of a filter roll-off or a filter type meeting the one or more criteria. The selecting at 510 may include, at 512, determining a portion of a channel to be available for subcarrier selection based at least in part on the determined guardband and, at 514, selecting a subcarrier within the available portion of the channel.

    [0059] At 516, the base station instructs the mobile device to utilize the selected subcarrier.

    [0060] At 518, the base station then determines a different guardband to use for a different mobile device based on a roll-off or type of filter of the different mobile device. The selected subcarrier for the mobile device may occupy a part of the channel associated with the different guardband of the different mobile device.

    [0061] At 520, the base station automatically reassigns the mobile device to a different subcarrier based on an addition or a loss of a connection with another mobile device.

    [0062] FIG. 6 illustrates an example process performed by a mobile device, the process including providing an indication of a roll-off or type of filter of the mobile device to a base station and receiving, from the base station, instructions to utilize a subcarrier. The process includes, at 602, providing, by a mobile device, an indication of a roll-off of a filter of the mobile device or a type of the filter to a base station of a telecommunication network. The providing at 602 may include, at 604, providing the indication of the roll-off or the type of the filter in a specific field of a registration message or a connection message.

    [0063] At 606, the mobile device listens to a channel, including the guardband portion of the channel, in response to instructions from the base station to tune to channel.

    [0064] At 608, the mobile device receives instructions from the base station to utilize a subcarrier on a frequency range of a channel for transmissions from the mobile device to the base station. The frequency range is used for mobile devices that have roll-offs or types of filters which meet one or more criteria and is reserved as a guardband portion of the channel applicable to other mobile devices that have roll-offs or types of filters which do not meet one or more criteria.


    Claims

    1. A base station (108, 110; 302) comprising:

    one or more processors (306);

    a radio (312) communicatively coupled to the one or more processors, the radio including a filter (116, 118; 314) associated with at least one of a filter type (116, 118) and a roll-off; and

    a guardband determination module (322) configured to be operated by the one or more processors to perform operations including:

    determining (402) the roll-off of the filter of the base station or the filter type of the filter of the base station;

    determining (404) a first guardband (128, 140) for a first frequency channel (122) based at least in part on the roll-off of the filter of the base station or the filter type of the filter of the base station;

    receiving (504), from a mobile device (102, 104, 106), an indication of a roll-off of a filter of the mobile device or a type of the filter (112, 114) of the mobile device; and

    determining (508) a second guardband (124, 134) for a second frequency channel (120) based at least in part on the roll-off of the filter of the mobile device or the type of the filter of the mobile device;

    the base station further comprising a scheduler (320), wherein the guardband determination module is a component of the scheduler, and the scheduler is configured to be operated by the one or more processors to perform operations including:

    selecting (406) a first subcarrier (130, 132, 142) for transmissions from the base station to the mobile device based at least in part on the determined first guardband for the first frequency channel;

    selecting (510) a second subcarrier (126, 136, 138) for transmissions from the mobile device to the base station based at least in part on the determined second guardband for the second frequency channel; and

    instructing (516) the mobile device to utilize the selected second subcarrier.


     
    2. The base station of claim 1, wherein the filter is an adjacent channel interference filter.
     
    3. A non-transitory computer-readable media having stored thereon a plurality of computer-executable instructions which, when executed by a base station (108, 110) of a telecommunication network, cause the base station to perform operations comprising:

    determining (402) the roll-off of the filter of the base station or the filter type of the filter of the base station;

    determining (404) a first guardband (128, 140) for a first frequency channel (122) based at least in part on the roll-off of the filter of the base station or the filter type of the filter of the base station;

    receiving (504), from a mobile device (102, 104, 106), an indication of a roll-off of a filter (112, 114) of the mobile device or a type of the filter;

    determining (508) a second guardband (124, 134) for a second frequency channel based at least in part on the roll-off or the type of the filter, the determined guardband being specific to the mobile device;

    selecting (406) a first subcarrier (130, 132, 142) for transmissions from the base station to the mobile device based at least in part on the determined first guardband for the first frequency channel;

    selecting (410) a second subcarrier (126, 136, 138) for transmissions from the mobile device to the base station based at least in part on the determined guardband; and

    instructing (516) the mobile device to utilize the selected second subcarrier.


     
    4. The non-transitory computer-readable media of claim 3, wherein the operations further comprise determining a different guardband to use for a different mobile device based on a roll-off or type of filter of the different mobile device.
     
    5. The non-transitory computer-readable media of claim 4, wherein the selected subcarrier occupies a part of the channel associated with the different guardband.
     
    6. The non-transitory computer-readable media of claim 3, wherein receiving the indication comprises receiving the indication in a specific field of a registration message or a connection message from the mobile device to the base station.
     
    7. The non-transitory computer-readable media of claim 3, wherein the operations further comprise maintaining (502) a default guardband used for a different mobile device when either or both of a roll-off or a type of filter of the different mobile device is unavailable.
     
    8. The non-transitory computer-readable media of claim 3, wherein the selecting comprises determining a portion of a channel to be available for subcarrier selection based at least in part on the determined guardband and selecting a second subcarrier within the available portion of the channel.
     
    9. The non-transitory computer-readable media of claim 3, wherein the selected first subcarrier is associated with a part of spectrum maintained as a guardband in the absence of a filter roll-off which meets a roll off threshold or a filter type specified by a network operator.
     
    10. The non-transitory computer-readable media of claim 3, wherein the selecting of the first subcarrier comprises determining a portion of a channel to be available for subcarrier selection based at least in part on the determined first guardband and selecting a subcarrier within the available portion of the channel.
     
    11. A method comprising:

    providing (602), by a mobile device (102, 104, 106), an indication of a roll-off of a filter (112, 114) of the mobile device or a type of the filter to a base station (108, 110) of a telecommunication network;

    receiving (608), by the mobile device, instructions from the base station to utilize a subcarrier (126, 136, 138) on a frequency range of a channel (120) for transmissions from the mobile device to the base station, the frequency range being used for mobile devices that have roll-offs which meet a roll-off threshold or a type of filter specified by the network operator.


     
    12. The method of claim 11 further comprising listening to a different channel (122) used for communications from the base station to the mobile device, including listening to a guardband (128, 140) portion of the different channel, in response to instructions from the base station to tune to different channel.
     


    Ansprüche

    1. Basisstation (108, 110; 302), umfassend:

    einen oder mehrere Prozessoren (306);

    ein Funkgerät (312), das kommunikationsfähig mit den einen oder mehreren Prozessoren verbunden ist, wobei das Funkgerät einen Filter (116, 118; 314) beinhaltet, der mindestens einem Filtertyp (116, 118) und einer Dämpfung zugeordnet ist; und

    ein Schutzbandbestimmungsmodul (322), das dazu ausgelegt ist, von den einen oder mehreren Prozessoren zur Durchführung von Vorgängen betätigt zu werden, die beinhalten:

    Bestimmen (402) der Dämpfung des Filters der Basisstation oder des Filtertyps des Filters der Basisstation;

    Bestimmen (404) eines ersten Schutzbands (128, 140) für einen ersten Frequenzkanal (122) basierend zumindest zum Teil auf der Dämpfung des Filters der Basisstation oder des Filtertyps des Filters der Basisstation;

    Empfangen (504), von einem Mobilgerät (102, 104, 106), einer Anzeige einer Dämpfung eines Filters des Mobilgeräts oder eines Typs des Filters (112, 114) des Mobilgeräts; und

    Bestimmen (508) eines zweiten Schutzbands (124, 134) für einen zweiten Frequenzkanal (120) basierend zumindest zum Teil auf der Dämpfung des Filters des Mobilgeräts oder des Filtertyps des Filters des Mobilgeräts;

    wobei die Basisstation des Weiteren einen Planer (320) umfasst, wobei das Schutzbandbestimmungsmodul eine Komponente des Planers ist und der Planer dazu ausgelegt ist, von den einen oder mehreren Prozessoren zur Durchführung von Vorgängen betätigt zu werden, die beinhalten:

    Auswählen (406) eines ersten Unterträgers (130, 132, 142) für Übertragungen von der Basisstation an das Mobilgerät basierend zumindest zum Teil auf dem bestimmten ersten Schutzband für den ersten Frequenzkanal;

    Auswählen (510) eines zweiten Unterträgers (126, 136, 138) für Übertragungen von dem Mobilgerät an die Basisstation, basierend zumindest zum Teil auf dem bestimmten zweiten Schutzband für den zweiten Frequenzkanal;

    Anweisen (516) des Mobilgeräts dazu, den ausgewählten zweiten Unterträger zu verwenden.


     
    2. Basisstation nach Anspruch 1, wobei der Filter ein Nachbarkanal-Interferenzfilter ist.
     
    3. Nicht-flüchtiges computerlesbares Medium, auf dem eine Vielzahl von computerausführbaren Befehlen gespeichert sind, die bei Ausführung durch eine Basisstation (108, 110) eines Telekommunikationsnetzwerkes die Basisstation zur Durchführung von Vorgängen veranlassen, umfassend:

    Bestimmen (402) der Dämpfung des Filters der Basisstation oder des Filtertyps des Filters der Basisstation;

    Bestimmen (404) eines ersten Schutzbands (128, 140) für einen ersten Frequenzkanal (122) basierend zumindest zum Teil auf der Dämpfung des Filters der Basisstation oder des Filtertyps des Filters der Basisstation;

    Empfangen (504), von einem Mobilgerät (102, 104, 106), einer Anzeige einer Dämpfung eines Filters (112, 114) des Mobilgeräts oder eines Typs des Filters;

    Bestimmen (508) eines zweiten Schutzbands (124, 134) für einen zweiten Frequenzkanal, basierend zumindest zum Teil auf der Dämpfung oder dem Typ des Filters, wobei das bestimmte Schutzband spezifisch für das Mobilgerät ist;

    Auswählen (406) eines ersten Unterträgers (130, 132, 142) für Übertragungen von der Basisstation an das Mobilgerät basierend zumindest zum Teil auf dem bestimmten ersten Schutzband für den ersten Frequenzkanal;

    Auswählen (410) eines zweiten Unterträgers (126, 136, 138) für Übertragungen von dem Mobilgerät an die Basisstation, basierend zumindest zum Teil auf dem bestimmten Schutzband; und

    Anweisen (516) des Mobilgeräts dazu, den ausgewählten zweiten Unterträger zu verwenden.


     
    4. Nicht-flüchtiges computerlesbares Medium nach Anspruch 3, wobei die Vorgänge des Weiteren das Bestimmen eines anderen Schutzbandes zur Verwendung für ein anderes Mobilgerät umfassen, basierend auf einer Dämpfung oder einem Filtertyp des anderen Mobilgeräts.
     
    5. Nicht-flüchtiges computerlesbares Medium nach Anspruch 4, wobei der ausgewählte Unterträger einen Teil des Kanals besetzt, der dem anderen Schutzband zugeordnet ist.
     
    6. Nicht-flüchtiges computerlesbares Medium nach Anspruch 3, wobei das Empfangen der Anzeige das Empfangen der Anzeige in einem bestimmten Feld einer Registrierungsnachricht oder einer Verbindungsnachricht von dem Mobilgerät an die Basisstation umfasst.
     
    7. Nicht-flüchtiges computerlesbares Medium nach Anspruch 3, wobei die Vorgänge des Weiteren das Aufrechterhalten eines Standard-Schutzbandes umfassen, das für ein anderes Mobilgerät verwendet wird, wenn eines oder beide aus einer Dämpfung oder einem Filtertyp des anderen Mobilgeräts nicht verfügbar ist.
     
    8. Nicht-flüchtiges computerlesbares Medium nach Anspruch 3, wobei das Auswählen das Bestimmen eines Teils eines Kanals umfasst, der für die Unterträgerauswahl verfügbar sein soll, basierend zumindest zum Teil auf dem bestimmten Schutzband, und das Auswählen eines zweiten Unterträgers in dem verfügbaren Teil des Kanals.
     
    9. Nicht-flüchtiges computerlesbares Medium nach Anspruch 3, wobei der ausgewählte erste Unterträger einem Teil eines Spektrums zugeordnet ist, das als ein Schutzband in der Abwesenheit einer Filterdämpfung aufrechterhalten wird, die einen Dämpfungsschwellenwert oder einen Filtertyp erfüllt, der von einem Netzwerkbetreiber angegeben wird.
     
    10. Nicht-flüchtiges computerlesbares Medium nach Anspruch 3, wobei das Auswählen des ersten Unterträgers das Bestimmen eines Teils eines Kanals umfasst, der für die Unterträgerauswahl verfügbar sein soll, basierend zumindest zum Teil auf dem bestimmten ersten Schutzband, und das Auswählen eines Unterträgers in dem verfügbaren Teil des Kanals.
     
    11. Verfahren, umfassend:

    Bereitstellen (602), durch ein Mobilgerät (102, 104, 106), einer Anzeige einer Dämpfung eines Filters (112, 114) des Mobilgeräts oder eines Typs des Filters für eine Basisstation (108, 110) eines Telekommunikationsnetzwerks;

    Empfangen (608), durch das Mobilgerät, von Befehlen von der Basisstation, einen Unterträger (126, 136, 138) auf einem Frequenzbereich eines Kanals (120) für Übertragungen von dem Mobilgerät an die Basisstation zu verwenden, wobei der Frequenzbereich für Mobilgeräte verwendet wird, die Dämpfungen aufweisen, die einen Dämpfungsschwellenwert oder einen Filtertyp erfüllen, der von dem Netzwerkbetreiber angegeben wird.


     
    12. Verfahren nach Anspruch 11,
    des Weiteren umfassend das Abhören eines anderen Kanals (122), der für Kommunikationen von der Basisstation an das Mobilgerät verwendet wird, einschließlich das Abhören eines Schutzbandteils (128, 140) des anderen Kanals, in Reaktion auf Befehle von der Basisstation, einen anderen Kanal einzustellen.
     


    Revendications

    1. Station de base (108, 110 ; 302) comprenant :

    un ou plusieurs processeurs (306),

    une radio (312) couplée par communication à ce ou ces processeurs, la radio incluant un filtre (116, 118 ; 314) associé à au moins l'un d'un type de filtre (116, 118) et d'une coupure, et

    un module de détermination de bande de garde (322) configuré pour être utilisé par le ou les processeurs dans le but d'effectuer des opérations comprenant :

    la détermination (402) de la coupure du filtre de la station de base ou bien du type de filtre de la station de base,

    la détermination (404) d'une première bande de garde (128, 140) pour un premier canal de fréquence (122) sur la base au moins en partie de la coupure du filtre de la station de base ou du type de filtre de la station de base,

    la réception (504), en provenance d'un dispositif mobile (102, 104, 106), d'une indication de la coupure d'un filtre du dispositif mobile ou bien du type du filtre (112, 114) du dispositif mobile, et

    la détermination (508) d'une seconde bande de garde (124, 134) pour un second canal de fréquence (120) sur la base au moins en partie de la coupure du filtre du dispositif mobile ou du type de filtre du dispositif mobile,

    la station de base comprenant en outre un programmateur (320), le module de détermination de bande de garde étant un composant du programmateur et le programmateur étant configuré pour être utilisé par le ou les processeurs dans le but d'effectuer des opérations comprenant :

    la sélection (406) d'une première sous porteuse (130, 132, 142) en vue de transmissions de la station de base au dispositif mobile sur la base au moins en partie de la première bande de garde déterminée pour le premier canal de fréquence,

    la sélection (510) d'une seconde sous porteuse (126, 136, 138) en vue de transmissions du dispositif mobile à la station de base sur la base au moins en partie de la seconde bande de garde déterminée pour le second canal de fréquence, et

    l'ordre (516) fait au dispositif mobile d'utiliser la seconde sous porteuse sélectionnée.


     
    2. Station de base selon la revendication 1, dans laquelle le filtre est un filtre d'interférences de canaux adjacents.
     
    3. Support non transitoire pouvant être lu par ordinateur comportant une pluralité d'instructions stockées exécutables par ordinateur qui, lorsqu'elles sont exécutées par une station de base (108, 110) d'un réseau de télécommunication, amènent la station de base à effectuer des opérations comprenant :

    la détermination (402) de la coupure du filtre de la station de base ou du type de filtre de la station de base,

    la détermination (404) d'une première bande de garde (128, 140) pour un premier canal de fréquence (122) sur la base au moins en partie de la coupure du filtre de la station de base ou du type de filtre de la station de base,

    la réception (504), en provenance d'un dispositif mobile (102, 104, 106), d'une indication de la coupure d'un filtre du dispositif mobile ou bien du type du filtre (112, 114) du dispositif mobile, et

    la détermination (508) d'une seconde bande de garde (124, 134) pour un second canal de fréquence (120) sur la base au moins en partie de la coupure ou du type de filtre, la bande de garde déterminée étant spécifique au dispositif mobile,

    la sélection (406) d'une première sous porteuse (130, 132, 142) en vue de transmissions de la station de base au dispositif mobile sur la base au moins en partie de la première bande de garde déterminée pour le premier canal de fréquence,

    la sélection (410) d'une seconde sous porteuse (126, 136, 138) en vue de transmissions du dispositif mobile à la station de base sur la base au moins en partie de la bande de garde déterminée, et

    l'ordre (516) fait au dispositif mobile d'utiliser la seconde sous porteuse sélectionnée.


     
    4. Support non transitoire pouvant être lu par ordinateur selon la revendication 3, dans lequel les opérations comprennent en outre la détermination d'une bande de garde différente en vue d'une utilisation pour un dispositif mobile différent sur la base de la coupure ou du type de filtre du dispositif mobile différent.
     
    5. Support non transitoire pouvant être lu par ordinateur selon la revendication 4, dans lequel la sous porteuse sélectionnée occupe une partie du canal associée à la bande de garde différente.
     
    6. Support non transitoire pouvant être lu par ordinateur selon la revendication 3, dans lequel la réception de l'indication comprend la réception de l'indication dans un champ spécifique d'un message d'enregistrement ou d'un message de connexion du dispositif mobile à la station de base.
     
    7. Support non transitoire pouvant être lu par ordinateur selon la revendication 3, dans lequel les opérations comprennent en outre le maintien (502) d'une bande de garde par défaut utilisée pour un dispositif mobile différent lorsque l'un ou l'autre de la coupure ou du type de filtre du dispositif mobile différent est indisponible ou que les deux le sont.
     
    8. Support non transitoire pouvant être lu par ordinateur selon la revendication 3, dans lequel la sélection comprend la détermination d'une partie d'un canal à rendre disponible pour une sélection de sous porteuse fondée au moins en partie sur la bande de garde déterminée, ainsi que la sélection d'une seconde sous porteuse à l'intérieur de la partie disponible du canal.
     
    9. Support non transitoire pouvant être lu par ordinateur selon la revendication 3, dans lequel la première sous porteuse sélectionnée est associée avec une partie de spectre maintenue comme bande de garde en l'absence d'une coupure de filtre qui satisfasse à un seuil de coupure ou à un type de filtre spécifié par un opérateur de réseau.
     
    10. Support non transitoire pouvant être lu par ordinateur selon la revendication 3, dans lequel la sélection de la première sous porteuse comprend la détermination d'une partie d'un canal à rendre disponible pour une sélection de sous porteuse fondée au moins en partie sur la première bande de garde déterminée, ainsi que la sélection d'une sous porteuse à l'intérieur de la partie disponible du canal.
     
    11. Procédé comprenant :

    la fourniture (602) à une station de base (100, 110) d'un réseau de télécommunication, par un dispositif mobile (102, 104, 106), d'une indication de coupure d'un filtre (112, 114) du dispositif mobile ou du type du filtre,

    la réception (608), par le dispositif mobile, d'instructions provenant de la station de base pour utiliser une sous porteuse (126, 136, 138) sur une plage de fréquences d'un canal (120) en vue de transmissions du dispositif mobile à la station de base, la plage de fréquences étant utilisée pour des dispositifs mobiles qui présentent des coupures qui satisfont à un seuil de coupure ou à un type de filtre spécifié par l'opérateur du réseau.


     
    12. Procédé selon la revendication 11, comprenant en outre l'écoute d'un canal différent (122) utilisé pour des communications de la station de base au dispositif mobile, ce qui comprend l'écoute d'une partie de bande de garde (128, 140) du canal différent, en réponse à des instructions provenant de la station de base ordonnant de s'accorder à un canal différent.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description