无线自组网与Internet互连中TCP流公平性分析与改进  

Analysis and improvement of TCP fairness across mobile ad hoc networks and Internet

作　　者：张凯捷[1] 向勇[1] 史美林[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《通信学报》2007年第10期1-6,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(60273010);清华信息科学与技术国家实验室基础研究基金资助项目~~

摘　　要：通过实验与分析揭示了基于IEEE 802.11 MAC的无线自组网与Internet互连时TCP流间的不公平性现象及其产生原因,并基于网关带宽占用对互连环境下TCP流间的公平性进行定义,提出了一种基于网关动态带宽控制的TCP流公平性解决方案TCP-GAFC。TCP-GAFC只在网关节点上进行实现,无需修改TCP协议和MAC协议,具有很好的适用性和可扩展性。仿真实验表明,TCP-GAFC显著地改进了互连环境下TCP流间的公平性,并能达到合理的总吞吐量。The behavior and reason of the TCP unfairness in Internet-connected mobile ad hoc networks based on IEEE 802.11 MAC were exposed through simulations and analysis, The concept of TCP fairness in hybrid environment was defined basing on the bandwidth occupation from the gateway, and an adaptive gateway bandwidth control scheme TCP-GAFC was proposed to solve the unfairness problem. TCP-GAFC only needs to be implemented in the gateways without modifying the TCP or MAC protocol. It has good applicability and scalability. The simulation results show that TCP-GAFC can significantly improve the TCP fairness, and can achieve reasonable throughput.

关 键 词：无线自组网 INTERNET互连 TCP流公平性 网关动态带宽控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]