带休假的返回n-ARQ系统时延性能研究  

Analysis of the delay performance of n-ARQ system with vacations

作　　者：黎锁平[1] 刘存明[1] 

机构地区：[1]兰州理工大学运筹与控制研究所,甘肃兰州730050

出　　处：《系统工程学报》2008年第3期367-371,共5页Journal of Systems Engineering

基　　金：教育部"春晖计划"基金资助项目(Z2006-1-62006);甘肃省高校研究生导师科研基金(0703-10);兰州理工大学优秀中青年教师基金(Q200106)

摘　　要：在对返回 n 步自动重传请求协议(返回 n-ARQ)的系统传输过程进行分析的基础上,利用等效服务时延的思想简洁有效地建立了返回 n-ARQ 系统的休假排队模型,求得了该系统的主要性能指标分组平均等待时延、平均服务时延以及归一化最大吞吐量等的表达式,给出确定最佳滑动窗口长度以及最佳分组长度的理论模型;最后通过数值模拟分析了分组传输正确率、滑动窗口长度以及分组长度对系统时延的影响,并分析论证了最佳滑动窗口长度以及最佳分组长度的存在性和可确定性及其变动规律.In this paper the transmission scheme of go-back-n automatic repeat request protocol （ n- ARQ） is analyzed firstly, then a queuing model of n-ARQ scheme with vacations is established sententiously and availably by using the equivalent service delay method, the expressions of system＇ s main performance measures, such as system＇ s average waiting time, average service delay time and normalized maximum throughput and so on, are gained and the model of optimal sliding window length and optimal data packet length are given. At last, the influence of correct ratio of the data packet＇ s transmission, sliding windows length and data packet length on system delay is analized by numerical simulation. Also, the existence and determinacy of the optimal sliding window length, data packet length and their alteration rules are resolved and validated by numerical simulations.

关 键 词：返回n步自动重传请求协议 休假排队模型 平均服务时延 最佳窗口和分组长度 

分 类 号：TN915.01[电子电信—通信与信息系统]