IEEE 802．11 DCF中带优先级的退避算法

严少虎; 卓永宁; 吴诗其; 郭伟

IEEE 802．11 DCF中带优先级的退避算法

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出版历程
- 收稿日期: 2004-03-08
- 修回日期: 2004-08-11
- 刊出日期: 2005-08-19

Priority BackoffAlgorithm for IEEE 802.11 DCF

摘要

摘要: 该文针对IEEE 802.11 DCF提出一个带优先级的退避算法.算法的基本思想是网络中的节点在侦听信道的同时,搜集其他节点发送数据的统计信息,并在本地维护一个关于节点已发送数据量的统计表.当节点有数据需要发送时,将根据表中的统计数据以及本节点的优先级来计算竞争窗口.计算机仿真证明,该算法能很好地完成网络的信道容量在不同优先级的节点之间按一定的比例分配,同时还可提高整个网络的吞吐率.
- 退避算法; 优先级; IEEE 802.11; 分布式协调功能
Abstract: A Priority BackoffAIgorithm （PBA） for IEEE 802.11 DCF is presented in this paper. The basic idea of PBA is each station should collect statistical data of other stations＇ transmission while sensing the channel, and maintaining a sent data table for all stations in network. When the station has data to transmit, it will calculate contention window based on the statistical data in sent data table and its own priority. Computer simulationproves that PBA can properly assign network capacity among stations in proportion to their priorities as well as enhance the network saturation throughput.

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参考文献(1)

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