EP 2638765 A1 20130918 - COMPATIBLE CHANNEL FOR EFFICIENT COEXISTENCE OF VOICE AND DATA TRAFFIC
Title (en)
COMPATIBLE CHANNEL FOR EFFICIENT COEXISTENCE OF VOICE AND DATA TRAFFIC
Title (de)
KOMPATIBLER KANAL FÜR EFFIZIENTE KOEXISTENZ VON SPRACH- UND DATENVERKEHR
Title (fr)
CANAL COMPATIBLE POUR COEXISTENCE EFFICACE DE TRAFIC VOIX ET DONNÉES
Publication
Application
Priority
- GB 201018935 A 20101109
- US 2011057443 W 20111024
Abstract (en)
[origin: GB2485355A] Speech and data packets are communicated during a timeslot of a quasi-circuit mode channel of a data physical channel. The timeslot may contain multiple calls, allowing simultaneous call monitoring. The quasi-circuit mode channel may have a periodicity in which the same timeslot in adjacent frames may not be occupied. Additional bandwidth may provide end-to-end encryption synchronisation, signaling, or data and may or may not be intended for receivers involved in any of the calls. A lower layer header, such as a MAC header, at the start of the time slot (prefix) identifies the timeslot as belonging to the channel, as being compatible with timeslots on a data channel and contains indicators to indicate information in the timeslot is intended for a device not taking in part in any call in the timeslot. Each call also contains a unique header that indicates call information for the call including whether data is contained in the timeslot. Uplink and downlink channels are allocated separately. When a call or speech item is terminated, the data physical channel is monitored for follow-on call-related signalling. Suitable for a TErrestrial Trunked RAdio (TETRA) environment.
IPC 8 full level
H04W 76/02 (2009.01)
CPC (source: EP GB)
H04W 72/044 (2013.01 - GB); H04W 74/04 (2013.01 - GB); H04W 76/15 (2018.02 - EP GB); H04W 72/121 (2013.01 - EP); H04W 84/08 (2013.01 - EP); H04W 88/06 (2013.01 - EP)
Designated contracting state (EPC)
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
DOCDB simple family (publication)
GB 201018935 D0 20101222; GB 2485355 A 20120516; GB 2485355 B 20130605; CN 104205987 A 20141210; CN 104205987 B 20180925; EP 2638765 A1 20130918; WO 2012064495 A1 20120518
DOCDB simple family (application)
GB 201018935 A 20101109; CN 201180054146 A 20111024; EP 11779301 A 20111024; US 2011057443 W 20111024