Ad Hoc中一种改进后退机制的基于多包接收的MAC算法  

An improved medium access control algorithm based on multi-packet reception in Ad Hoc network

作　　者：李洁[1] 杨震[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《信息技术》2006年第9期8-10,18,共4页Information Technology

基　　金：国家863资助项目(2002AA121068)

摘　　要：物理层多包接收技术的发展给利用物理层多包接收能力的媒体接入控制(MAC)协议的设计带来了挑战。IEEE 802.11 DCF是目前WLAN最成熟的分布式MAC协议之一,对其在多包接收模型下进行性能改善将有很大的应用价值。在物理层具有多包接收能力的基础上,提出了一种改进的802.11 DCF协议,并将该协议应用于现有的基于802.11 DCF的多包接收MAC算法(MDCF),理论分析和NS-2仿真实验结果表明,该算法与IEEE 802.11 DCF和MDCF相比,在网络吞吐量和时延性能方面有很大的改善。The improvement of the physical layer＇s multi-packet reception ability introduces great challenges to MAC protocol design. Since IEEE 802.11 DCF is one of the most widely used protocols in WIAN, improving its performance based on the MPR model could have widespread benefits. In this paper, based on IEEE 802.11 DCF and MDCF, a back-off time modified MAC algorithm based on MPR is proposed. Compared with IEEE 802. 11 MAC protocol and MDCF, the simulation results under NS-2 show that the new algorithm works well in throughput performances.

关 键 词：媒体接入控制 多包接收 后退机制 吞吐量 

分 类 号：TN911.6[电子电信—通信与信息系统]