基于DSPN的IEEE 802.11通信过程的建模与性能分析  

The Model and Performance Analysis of IEEE 802.11 Based on DSPN

作　　者：周悦[1] 单丹[1] 单泷 阚凤龙[1] 

机构地区：[1]沈阳建筑大学信息与控制工程学院,辽宁沈阳110168 [2]沈阳欣天辰数码有限公司,辽宁沈阳110004

出　　处：《沈阳建筑大学学报（自然科学版）》2009年第3期590-594,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(60434030);建设部基金项目(06-K9-64);辽宁省教育厅基金项目(2008594)

摘　　要：目的针对基于四向握手的RTS/CTS方式的IEEE 802.11通信协议系统进行建模与性能分析.方法应用确定与随机Petri网DSPN,对单节点进行了确切的描述,进而构成复合模型,采用伤停补时的思想有效地描述退避行为.结果仿真实验获得了IEEE 802.11通信系统中负载与端到端信息时延和吞吐量之间的定量关系,即平均端到端信息时延随着信息到达间隔的增加而增加,端到端吞吐量随着信息到达间隔的增加而减少.结论所建模型能够有效地描述和分析IEEE 802.11通信机制,为协议的改进和实际工程应用提供指导.A detailed DSPN（ Deterministic and Stochastic Petri Net）model of RTS/CTS based on the fourway handshake for IEEE 802. 11 was constructed and its performance analysis was given in this paper. Firstly, the single node model and multiple node model of the behavior of the IEEE 802. 11 protocol were accurately described by DSPN, and the backoff behavior was effectively described, especially through the idea of ＂injury time＂. The simulation research based on the DSPN model was developed, which showed the quantitative relation of average end-to-end packet latency and data throughout with traffic load. That was to say that the average end-to-end packet latency increased and end-to-end data throughout decreased with the increase of interval of message arrival. These results show that the DSPN model can effectively describe and analyze the communication behavior of IEEE 802. 11 system, and set up a good basis for further design and realization of communication protocols.

关 键 词：CSMA/CA 分布式协调功能DCF 确定与随机Petri网DSPN 网络性能 

分 类 号：TN915.04[电子电信—通信与信息系统] TP393.1[电子电信—信息与通信工程]