摘要
在考虑分组长度、信道传输质量的影响下,运用带休假的M/G/1排队模型分析SW-ARQ系统的时延性能指标。分别获得了单信道SW-ARQ系统和多信道SW-ARQ系统分组平均等待时延和系统平均时延解析表达式,并将两种系统的时延性能指标分别进行分析比较。分析结果表明,当分组长度较大时,采用多信道SW-ARQ可以获得较小的系统平均时延,提高系统的传输可靠性。最后通过数值模拟比较分析了单信道SW-ARQ系统和多信道SW-ARQ系统下分组长度、传输正确率以及到达率对系统平均时延的影响。
In consideration of packet length and channel transmission quality,established a queuing model of multi-channel SW-ARQ scheme with vacation sententiously and availably by using the equivalent service delay method,measured the expressions of systems main performance,such as systems average waiting time,average delay time and so on,analysis and compa-rison of time-delay performance of the single-channel SW-ARQ and multi-channel SW-ARQ.The analysis results show that,when the packet length is large,the multi-channel SW-ARQ achieves lower delay time and improves the reliability of the system.At last,the influence of data packet length and correct ratio of the data packets transmission on system delay is analyzed by numerical simulation.
出处
《计算机应用研究》
CSCD
北大核心
2011年第5期1813-1815,共3页
Application Research of Computers
基金
国家教育部"春晖计划"基金资助项目(Z2006-1-62006)
甘肃省自然科学基金资助项目(0809RJZA019)
甘肃省高校研究生导师科研基金资助项目(0703-10)