ARQ通信系统的性能优化与帧长度的动态选择  

IMPROVING ARQ PERFORMANCE AND DYNAMICALLY SELECTING FRAME SIZE

作　　者：龚天富[1] 徐开来[1] 刘洪[1] 陈亚平[1] 

机构地区：[1]电子科技大学,鼎天微电有限公司

出　　处：《计算机应用》1994年第3期24-26,共3页journal of Computer Applications

基　　金：四川省科委应用基础研究基金

摘　　要：本文考虑了正向信道不可检错和反向信道差错，并用齐次马尔可夫链精确完整地分析了ＡＲＱ通信系统的工作过程，从而将系统的表现传输效率和有效传输效率严格地区分开来。所推导出的性能公式能够在Ｍｏｄｅｍ远程通信这样的宽误码率环境下通用。本文研究了帧长与有效传输效率的关系。结果表明根据信道质量动态地选择帧长能够显著提高ＡＲＱ协议性能。Considering the undetected forward channel errors and the backward channel errors, the operating process of selective-repeat ARQ communication system is accurately described by odd Markov chains. The concepts of apparent throaghput effeciency and effective throughput effecieucy are thereby proposed. The throughput equations abtained in this paper are generic over a wide range of bit error rates. Using effective throughput effeciency as optimization object, this paper also discussed how to improve ARQ protocol performance by selecting frame sire dynamicly.

关 键 词：自动请求重传 通信系统 性能优化 

分 类 号：TN919.3[电子电信—通信与信息系统]