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1. (WO2015113645) INTER-GROUP CONTROL OF SEMI-PERSISTENT CHANNEL OCCUPATION FOR DEVICE-TO-DEVICE (D2D) WIRELESS COMMUNICATIONS

Pub. No.:    WO/2015/113645    International Application No.:    PCT/EP2014/052317
Publication Date: Fri Aug 07 01:59:59 CEST 2015 International Filing Date: Fri Feb 07 00:59:59 CET 2014
IPC: H04W 72/02
H04W 74/08
Applicants: NOKIA SOLUTIONS AND NETWORKS OY
Inventors: VAN PHAN, Vinh
YU, Ling
HORNEMAN, Kari Veikko
Title: INTER-GROUP CONTROL OF SEMI-PERSISTENT CHANNEL OCCUPATION FOR DEVICE-TO-DEVICE (D2D) WIRELESS COMMUNICATIONS
Abstract:
An example method includes determining that a wireless channel is free or idle, obtaining, by a first user of the first user group via an inter-group contention window, the wireless channel for a group channel holding period for the first user group, and controlling sending a channel status information including at least a channel status signal indicating that the wireless channel is busy or occupied and information indicating that the first user group is occupying the wireless channel. According to another example implementation, a method may include determining whether a wireless channel is occupied by the first user group, obtaining the channel via an intra-group contention window if the wireless channel is occupied by the first user group, and otherwise, obtaining the channel via an inter-group contention window if the wireless channel is not occupied by the first user group.