WMN中基于概率访问的EDCA流量平衡方案  

An EDCA Flow Balance Scheme Using Probabilistic Access in WMN

作　　者：朱亚东[1] ZHU Ya-dong(Information Center,Jiangsu Union Technical Institute Nanjing Engineering Branch,Nanjing 211135,China)

机构地区：[1]江苏联合职业技术学院南京工程分院信息中心

出　　处：《控制工程》2019年第12期2264-2271,共8页Control Engineering of China

摘　　要：针对多接口定向无线网状网络(Wireless Mesh Network, WMN)中端到端间的流量分配不平衡问题,提出一种基于概率访问的局部分布式EDCA流量平衡解决方案。由于在多接口网状网络中,端到端之间进行双向通信时会产生流量的不平衡分配问题,该问题直接导致标准增强分布式信道接入(Enhanced Distributed Channel Access, EDCA)机制的低效信道访问。因此,将多接口定向WMN中端到端之间的流量平衡分配问题建模为一种凸优化模型。根据聚集问题的凸属性,设计了一种局部分布式解决方案解决流量平衡分配问题。同时,为了保证网状STA中单个接口的访问需求,在EDCA中使用了一种有效的概率信道访问机制实现信道分配。仿真结果表明,该方案能够很好地平衡网络吞吐量和网络容量,提高了网络性能。Aiming at the problem of unbalanced flow allocation among end-to-end in multi-interface oriented WMN, this paper proposed a local distributed EDCA flow balance solution based on probabilistic access. Uses of directional communication in a multi-interface mesh network introduced the problem of unbalanced flow allocation among the end-to-end flow that resulted in inefficient channel access using the standard EDCA mechanism. This paper modeled the problem of flow balance among end-to-end flow in multi-interface directional WMN as a convex optimization problem model. According to the convex property of aggregation problem, a local distributed solution was designed to solve the problem of flow balance allocation. Furthermore, an efficient probabilistic channel access mechanism was used in EDCA in order to guarantee the access requirements of a single interface in a mesh STA and achieve channel assignment. The simulation results show that the solution can balance network throughput and network capacity well and improve network performance.

关 键 词：无线网状网络 概率访问 局部分布式 IEEE 802.11 s 流量平衡 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]