Multicast qos support in ieee 802.16

  • Authors:
  • Andrey Lyakhov;Vladimir Vishnevsky;Mikhail Yakimov

  • Affiliations:
  • IITP RAS, Moscow, Russian Fed.;IITP RAS, Moscow, Russian Fed.;IITP RAS, Moscow, Russian Fed.

  • Venue:
  • Proceedings of the 3rd ACM workshop on QoS and security for wireless and mobile networks
  • Year:
  • 2007

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Abstract

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.