无线mesh中传输速率抖动抑制策略研究  

Research on the Scheme of Churn Suppression for Wireless Mesh Network

作　　者：乐光学[1,2] 骆丹[1,2] 刘建生[2] 李明明[1,2] 

机构地区：[1]嘉兴学院数理与信息工程学院,嘉兴314001 [2]江西理工大学理学院,赣州341000

出　　处：《电信科学》2014年第10期89-98,共10页Telecommunications Science

基　　金：浙江省自然科学基金资助项目(No.LY12F02019);浙江省公益技术应用研究项目(No.2011C23130);浙江省嘉兴市科技计划基金资助项目(No.2012AY1027)

摘　　要：通过分析无线mesh网络中节点的抖动行为特征,针对节点因拥塞导致的限速行为提出了抖动抑制策略。当访问节点选择流媒体服务提供节点时,通过预测抖动概率效用函数,选择抖动较低的节点为流媒体服务源端节点;构建节点失效恢复策略,当发生拥塞且预测抖动概率较大时,判定节点失效,启动节点替换机制并实现服务迁移。实验结果表明,该策略能有效抑制通信链路的传输速率抖动,提高网络的服务性能,同时验证了网络中节点抖动的客观存在性。Through analysis of behavioral characteristics of chum nodes in wireless mesh network, a schema wasproposed to improve the speed limit caused by congestion. The basic idea of the approach is to heuristically selectthe service nodes with lowest churn rate when it accesses the streaming media, where the churn rate is predictedthrough a utility function. In addition, a failure recovery scheme for the chum nodes with heavy congestion wasproposed. A node was considered failure and replaced with another peer by migrating the services on it wheneverthe node encounters congestion and its chum rate exceeded a predefined threshold. Simulation results show that thescheme can not only efficiently solve the problem of high congestion, single failure, and low delivery efficiency, but alsosignificantly improve the QoS of the wireless mesh network, at the same time to verify the objective existence of chum.

关 键 词：无线MESH网络 传输速率 抖动和拥塞 邻居选择 失效恢复 

分 类 号：TN915.04[电子电信—通信与信息系统]