for error detection. Figure . PAC MPDU format Multiple access Multiple access schemes allow multiple PDs to share a communication medium. Contention-based access as well as contention-free access schemes are considered. In a contention-based multiple access scheme, multiple PDs compete for channel access. Contention-free multiple access schemes try to guarantee channel access to PDs so that the PDs do not have to compete for channel access. Synchronization procedure Key desired features of synchronization procedure are as follows: The purpose of synchronization is to find, at least, the time boundary either at the PHY or the MAC. The time boundary may be symbol, slot, frame, application frame, super frame, etc. Synchronization reference signal may be a sequence or a beacon. Any PD should be able to synchronize with a PD or PDs in at least the discovery radio range, i.e. synchronized with neighboring PDs. is no specific and static synchronization reference PD operating in a centralized manner, i.e. there is no dedicated PD for sending synchronization reference signal like a coordinator in a centralized control system. Synchronization mechanism should support low duty cycling for discovery and peering, i.e. low overhead for discovery and peering. Synchronization mechanism should efficiently support PDs participating in one or multiple group communications. Synchronization mechanism should efficiently support multi-hop communications. procedure Key desired features of peer discovery procedure: Peer discovery function is enabled or disabled triggered by upper layer. Peer discovery information is driven from layer. Peer discovery message contains at least peer discovery information. A PD may transmit peer discovery message periodically during peer discovery broadcasting. The MAC sublayer may provide differentiated operations according to traffic types. management Interference multiple links is managed by the threshold level. control A PD may perform transmit power control based on channel measurement status.
for error detection. Figure . PAC MPDU format Multiple access Multiple access schemes allow multiple PDs to share a communication medium. Contention-based access as well as contention-free access schemes are considered. In a contention-based multiple access scheme, multiple PDs compete for channel access. Contention-free multiple access schemes try to guarantee channel access to PDs so that the PDs do not have to compete for channel access. Synchronization procedure Key desired features of synchronization procedure are as follows: The purpose of synchronization is to find, at least, the time boundary either at the PHY or the MAC. The time boundary may be symbol, slot, frame, application frame, super frame, etc. Synchronization reference signal may be a sequence or a beacon. Any PD should be able to synchronize with a PD or PDs in at least the discovery radio range, i.e. synchronized with neighboring PDs. is no specific and static synchronization reference PD operating in a centralized manner, i.e. there is no dedicated PD for sending synchronization reference signal like a coordinator in a centralized control system. Synchronization mechanism should support low duty cycling for discovery and peering, i.e. low overhead for discovery and peering. Synchronization mechanism should efficiently support PDs participating in one or multiple group communications. Synchronization mechanism should efficiently support multi-hop communications. procedure Key desired features of peer discovery procedure: Peer discovery function is enabled or disabled triggered by upper layer. Peer discovery information is driven from layer. Peer discovery message contains at least peer discovery information. A PD may transmit peer discovery message periodically during peer discovery broadcasting. The MAC sublayer may provide differentiated operations according to traffic types. management Interference multiple links is managed by the threshold level. control A PD may perform transmit power control based on channel measurement status.
15-14-0271-01-0008-samsung-etri-merged-proposal-to-tg8-cfc.docx