Reliable Multicast in Multi-Access Wireless LANs
Wireless Networks
Throughput Improvements Using the Random Leader Technique for the Reliable Multicast Wireless LANs
ICN '01 Proceedings of the First International Conference on Networking-Part 1
Wireless local area networks: the new wireless revolution
Wireless local area networks: the new wireless revolution
Reliable MAC Layer Multicast in IEEE 802.11 Wireless Networks
ICPP '02 Proceedings of the 2002 International Conference on Parallel Processing
ISRN Communications and Networking
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Multicast is a very popular bandwidth-conserving technology exploited in many multimedia applications. However, the existing IEEE 802.16 spec. provides no error recovery mechanism (ARQ) for multicast traffic. ARQ absence in wireless networks unreliable by their nature leads to frequent packet losses, which is inappropriate for most of multimedia applications. In the paper, we propose new reliable multicast mechanism supporting multimedia QoS (packet loss ratio, latency and throughput) in IEEE 802.16 Wireless Metropolitan Area Networks (WMANs). This mechanism is based on the concept of multiple ACK-leaders, i.e. multicast recipients responsible for acknowledging data packets. We develop accurate analytical models of the mechanism with various leader selection schemes, and use the models to study optimize the schemes. Numerical results show that the proposed mechanism can be easily tuned to meet specific QoS requirements of multimedia or any other multicast applications.