Chapter 5. Multiple Access Control Protocols
Published Online: 21 MAR 2006
Copyright © 2005 John Wiley & Sons, Inc. All rights reserved.
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
- Published Online: 21 MAR 2006
- Published Print: 23 SEP 2005
Print ISBN: 9780471723462
Online ISBN: 9780471757191
- multiuser diversity;
- dynamic channel allocation
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.