IEEE802.11MAC协议中退避算法的研究

Backoff Algorithm for IEEE802.11MAC Protocol

无线信道固有的特点,使得无线局域网面临比有线局域网更多的困难。发展合适的介质访问控制协议(MAC)是无线局域网一个关键,而其中退避算法又是 MAC 协议考虑的重点。本文介绍了退避机制在 IEEE802.11MAC 层中的作用,指出了二进制指数退避算法存在的不足。对当前已提出的多种典型退避算法进行了介绍,对各类算法的设计思想进行了分类。最后阐明了退避算法研究的发展趋势。

This paper introduces the key functionality of backoff mechanism in IEEE802.11MAC and the flaws of the binary exponential backoff algorithm. Then, it reviews various typical backoff algorithms currently proposed and categorize their design ideas. Finally, it elaborates the possible research trend on backoff algorithms.