IEEE 802.11e EDCA协议吞吐率性能分析模型  

Throughput performance analysis model for IEEE 802.11e EDCA protocol

作　　者：王心源 程鹏[1] 吴斌 Wang Xinyuan;Cheng Peng;Wu Bin(Institute of Microelectronics of the Chinese Academy of Sciences,Beijing 100029,China;School of Microelectronics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院微电子研究所,北京100029 [2]中国科学院大学微电子学院,北京100049

出　　处：《电子技术应用》2022年第1期115-118,123,共5页Application of Electronic Technique

基　　金：“新一代宽带无线移动通信网”国家科技重大专项(2012ZX-03004-004)。

摘　　要：对IEEE 802.11e增强的分布式控制接入协议进行了详细分析,对比分布式协调功能DCF与增强的分布式控制接入EDCA之间的差别,提出了一种四维马尔科夫链模型,该模型将饱和条件情况和非饱和条件情况进行统一。该模型不仅考虑了退避计时器冻结状态、发送冲突状态、最大重传次数,还充分考虑了不同接入优先级流的内部冲突和TXOP传输。相比于二维马尔科夫链模型,该模型可以准确预测EDCA中不同优先级接入流的吞吐率。最后利用仿真软件,验证了饱和条件下该模型的正确性。This paper analyzes the IEEE 802.11e enhanced distributed control access protocol in detail,compares the difference between the distributed coordination function DCF and the enhanced distributed control access EDCA,and proposes a four-dimensional Markov chain model.The model unifies the saturated condition and the unsaturated condition.This model not only considers the freeze state of the backoff timer,the transmission conflict state and the maximum number of retransmissions,but also fully considers the internal conflicts and TXOP transmissions of different access priority streams.Compared with the two-dimensional Markov chain model,this model can accurately predict the throughput of access flows with different priorities in EDCA.At last,simulation software is used to verify the correctness of the model under saturation conditions.

关 键 词：IEEE 802.11e 增强的分布式控制接入 马尔科夫链模型 

分 类 号：TN925.93[电子电信—通信与信息系统]