张贺,
张昭,
张勋杨
重庆邮电大学计算机科学与技术学院 ??重庆 ??400065
基金项目:国家自然科学基金(61876200, 61602073)，国家重点研发计划(2018YFB0904900, 2018YFB0904905)
详细信息
作者简介:王练：女，1976年生，博士，副教授，研究方向为网络编码，无线网络安全
张贺：男，1991年生，硕士生，研究方向为网络编码
张昭：男，1993年生，硕士生，研究方向为安全网络编码
张勋杨：男，1993年生，硕士生，研究方向为网络编码
通讯作者:王练 wanglian@cqupt.edu.cn
中图分类号:TP393计量
文章访问数:1510
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被引次数:0
出版历程
收稿日期:2018-09-18
修回日期:2019-02-20
网络出版日期:2019-03-04
刊出日期:2019-08-01
A Priority Scheduling Scheme Based on Adaptive Random Linear Network Coding
Lian WANG,,He ZHANG,
Zhao ZHANG,
Xunyang ZHANG
School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Funds:National Natural Science Foundation of China (61876200, 61602073), National Key R&D Program of China (2018YFB0904900, 2018YFB0904905)
摘要
摘要:该文针对无线多播网络中基于随机线性网络编码(RLNC)调度方案计算复杂度高，且网络传输性能易受反馈信息影响等问题，提出一种基于自适应RLNC的优先级调度方案(PSARLNC)。该方案结合视频流的特征采用适应多播的RLNC，相较于传统RLNC计算复杂度降低。经过初始传输后，在后续数据恢复阶段，综合考虑数据包剩余传输时隙，选取目的节点增益最大传输方式，最大化数据传输。同时，各中继节点根据接收情况，构建各自解码概率值，并以此为依据确定调度优先级并完成转发，自适应调整各节点传输，有效减少对反馈信息的依赖。仿真结果表明该方案与完全反馈方案性能十分接近，且在减小计算复杂度和降低对反馈信息依赖同时保证了较好的性能。
关键词:无线多播网络/
随机线性网络编码/
多中继/
调度/
反馈
Abstract:A Priority Scheduling scheme based on Adaptive Random Linear Network Coding (PSARLNC) is proposed, to avoid the high computation complexity of the scheduling scheme based on Random Linear Network Coding (RLNC) and the high feedback dependence of the network performance. The characteristics of the video stream and RLNC adapted to multicast are combined in this scheme. Compared with the traditional RLNC, the computation complexity of this scheme is reduced. After the initial transmission, the transmission slots left of the data packet are comprehensively considered in the subsequent data recovery phase, and the maximum transmission node of the destination node gain is selected to maximize data transmission. At the same time, the decoding probability is available according to the different receiving situations in each relay node. According to the decoding probability value, the scheduling priority is determined, and the forwarding is completed. The transmission of each node is adaptively adjusted, and the feedback information is effectively reduced. The simulation results show that the performance of this scheme is approached to the full-feedback scheme, with better performance in the reducing computational complexity and the decreasing feedback dependence.
Key words:Wireless multicast network/
Random Linear Network Coding(RLNC)/
Multi-relay/
Scheduling/
Feedback
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