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

作　　者：王练[1] 张勋杨 张昭 张贺 Wang Lian;Zhang Xunyang;Zhang Zhao;Zhang He(Institute of Computer Science&Technology,Chongqing University of Posts&Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学计算机科学与技术学院,重庆400065

出　　处：《计算机应用研究》2020年第7期2167-2170,共4页Application Research of Computers

基　　金：重庆市教委科学技术研究项目(KJ1704103)。

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。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.

关 键 词：网络编码 中继协作 缓存阈值 马尔可夫 开销 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]