Chapter 5. Multiple Access Control Protocols

  1. Hui Liu and
  2. Guoqing Li

Published Online: 21 MAR 2006

DOI: 10.1002/0471757195.ch5

OFDM-Based Broadband Wireless Networks: Design and Optimization

OFDM-Based Broadband Wireless Networks: Design and Optimization

How to Cite

Liu, H. and Li, G. (2005) Multiple Access Control Protocols, in OFDM-Based Broadband Wireless Networks: Design and Optimization, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/0471757195.ch5

Publication History

  1. Published Online: 21 MAR 2006
  2. Published Print: 23 SEP 2005

ISBN Information

Print ISBN: 9780471723462

Online ISBN: 9780471757191

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Keywords:

  • MAC;
  • OFDMA;
  • multiuser diversity;
  • dynamic channel allocation

Summary

In this chapter, we first overview the two mostly used wireless multiple access control protocols, namely, contention and non-contention based protocols. Each protocol is briefly described with examples in practical systems. The emphasis of this chapter is on multiuser diversity in OFDMA networks. We define the multiuser diversity gain as the system performance improvement due to diverse utility values perceived by different users on each radio resource. We prove the optimality of OFDMA in generic downlink multiuser SISO/MIMO models. For practical application, such as the WiMAX OFDMA mode, we present two OFDMA subcarrier and power allocation criteria/algorithms suitable for real-time implementation.