基于IEEE 802.11的多信道多址接入协议性能分析  

Performance Analysis of a Multi-Channel MAC Protocol Based on IEEE 802.11 Wireless LAN

作　　者：李红艳[1] 李建东[1] 曹勇[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《电子学报》2009年第4期905-908,883,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60572145;60496316);国家杰出青年科学基金(No.60725105);国家863高技术研究发展计划(No.2007AA01Z217)

摘　　要：本文对一种基于IEEE 802.11 DCF协议多信道多址接入方案的性能进行了分析,在该接入方案中,节点在公共的控制信道上预约数据信道,随后在预约成功的数据信道上,进行数据分组的传输.本文采用马尔科夫链构建了控制信道的预约模型,给出了多信道吞吐量的理论分析算法.最后,通过仿真验证了理论分析结果与仿真结果的一致性,并给出了信道吞吐量与信道数、数据分组长度、节点密度、信道切换时延等参数之间的数值关系.We present a method to analyze the characteristics of a class of multi-channel medium access control scheme which based on IEEE 802.11 protocol.In this scheme,one channel is used as the control channel to reserve a data channel for exchanging data packets. Once a pair of nodes makes agreement, they exchange data packets on the reserved data channel. We use a Markov chain to model the control channel. Furthermore, we present an algorithm to calculate the average channel throughput. The numerical results of our algorithm are coincide with simulation results. We also analyze the throughput performance of the multichannel MAC schemes while changing parameters, such as number of channel,length of data packets and,channel switch delay.

关 键 词：多址接入协议 多信道 吞吐量模型 马尔科夫链 

分 类 号：TN915[电子电信—通信与信息系统]