《计算机应用研究》|Application Research of Computers

基于缓存管理的网络编码中继传输方案

Network coding relay transmission scheme based on buffer management

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作者 王练,张勋杨,张昭,张贺
机构 重庆邮电大学 计算机科学与技术学院,重庆 400065
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文章编号 1001-3695(2020)07-051-2167-04
DOI 10.19734/j.issn.1001-3695.2019.01.0023
摘要 针对中继协作无线网络中节点缓存空间有限以及传输和缓存数据包都存在开销等问题进行了研究,提出了一种基于缓存管理的网络编码中继传输方案。在传输过程中该方案以最小化系统开销为目标,考虑多流综合优化问题,利用马尔可夫链对缓存队列进行建模分析。同时其结合编码流速率增加编码机会,获得中继处不同流的缓存阈值,更合理地实现了编码决策。分析与仿真结果表明该方案能有效权衡编码机会和开销,相比其他方案能有效降低时延且提高网络吞吐量。
关键词 网络编码; 中继协作; 缓存阈值; 马尔可夫; 开销
基金项目 重庆市教委科学技术研究项目(KJ1704103)
本文URL http://www.arocmag.com/article/01-2020-07-051.html
英文标题 Network coding relay transmission scheme based on buffer management
作者英文名 Wang Lian, Zhang Xunyang, Zhang Zhao, Zhang He
机构英文名 Institute of Computer Science & Technology,Chongqing University of Posts & Telecommunications,Chongqing 400065,China
英文摘要 Focusing on the problems that the limited buffer space, and the overhead of transmitting and buffering packets in relay-assisted wireless network, this paper proposed a RTBM scheme. In order to minimize the system overhead during transmission, the RTBM considered multi-stream comprehensive optimization, and used the Markov chain to model and analyze the buffer queue. Combined the the encoding stream rate to increase the coding opportunities, the scheme determined the buffer thresholds of different queues and implemented the coding decision more reasonably. The simulation results show that the scheme can effectively balance the coding opportunities and overheads, and can effectively reduce the delay and improve the network throughput.
英文关键词 network coding; relay-assisted; buffer threshold; Markov; overhead
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收稿日期 2019/1/22
修回日期 2019/3/14
页码 2167-2170
中图分类号 TP393
文献标志码 A