无线接入网数据包最大重传次数的仿真和优化  

Simulation and Optimization of Maximum Number of Retransmissions for Wireless Access Network Data Package

作　　者：张娟[1] 李平安[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《计算机技术与发展》2007年第9期146-148,173,共4页Computer Technology and Development

基　　金：湖北省自然科学基金资助项目(2005ABA224)

摘　　要：数据业务已经成为第三代移动通信系统区别于二代移动通信系统的一个显著标志。而无线传输环境的不稳定性则使得数据的传输不能像有线网络那样得到可靠的保障。因此,在三代通信系统的无线接入网部分设定了一系列的机制来尽量减少丢包的发生。文中重点研究的是无线链路层数据包的最大重传次数对系统性能的影响,通过仿真不同的场景来找出不同的最大重传次数对系统的影响规律,从而配置合理的参数,优化系统性能。Supporting packet service is a significant aspect for the third mobile communication system different to the second generation system. However, because of the complexity of the radio transport environment, the wireless system can not provide reliable transmis- sion. For this reason, the third generation of mobile communication system provides a lot of mechanism to reduce the loss of packet data in the radio access network. In this paper, we show by analytical means and computer simulations that for a given block error rate （BLER）, the maximum number of radio link control （RLC） transmissions has a very important impact on TCP performance. Based on the simulation results, we try to configure the appropriate parameter to optimize the system performance.

关 键 词：无线链路控制层 传输控制协议 最大重传次数 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]