摘要
由于红外线通信半双工的特点,GBN-ARQ重传机制与全双工传输链路上的GBN-ARQ重传机制有很大不同。研究了半双工传输链路上的GBN-ARQ重传机制,分析了该机制在半双工传输链路上的传输特征,将影响传输系统的因素参数化,在此基础上利用排队理论分析系统时延组成,求得了GBN-ARQ系统的分组平均等待时延与平均分组服务时延的一般表达式。通过数值仿真分析了分组传输正确率、发送窗口长度以及分组长度对系统时延的影响。
Because of the specific property of half-duplex over the IrDA links,Go-Back-N Automatic Repeat request protocol（GBN-ARQ） is different from GBN-ARQ over duplex links.In this paper,the GBN-ARQ protocol over half-duplex links was proposed,and the factors which affect the transmission system were expressed with proper parameters according the property of half-duplex links.Then,the general expression of average packet delay was obtained through analyzing the component of average packet delay by using queuing theory,which contains average packet waiting delay and packet service delay.At last,the influence of packet error rate,windows length and data packet length on system delay was analyzed by numerical simulation.
出处
《计算机科学》
CSCD
北大核心
2011年第2期38-41,共4页
Computer Science
基金
教育部"春晖计划"基金(Z2006-1-62006)
甘肃省自然科学基金(0809RJZA019)
甘肃省高校研究生导师科研基金(0703-10)资助
