Synchronous Multicast and Broadcast Service in Multi-Rate IEEE 802.16j WiMAX Relay Network
IEEE 802.16j Mobile Multihop Relay Standard defines multi-hop relay operation in a WiMAX system. It uses a novel synchronous multicast and broadcast transmission mechanism to achieve macro diversity. With the newly introduced synchronous delivery constraint, the multicast data delivery algorithm should be designed differently to enhance system performance. This paper provides Multi-Rate Selection Algorithm (MRSA) for Multicast and Broadcast (MBS) data delivery. It could reduce the data distribution delay from the BS to all the RSs. Besides, the authors also propose the path selection algorithm to further improve the effectiveness of MRSA.