摘要
为了满足终端用户的个性化需求并且降低D2D网络的传输时延,提出了一种基于终端差异化的立即可解网络编码(IDNC)协作重传方案。首先,针对PC-D2D网络存在的解码冲突以及传输冲突问题提出一种新的IDNC算法框架并且在此框架的基础上搜索极大独立集(MIS),综合考虑数据包的接收情况、终端用户需求以及链路丢包率情况设计权重,衡量权重选取一次重传时延增量最小的并发协作重传终端以及数据包组合生成编码包;同时,考虑不需要数据包提供的未来解码机会,优化终端不需要的数据包,进一步降低传输时延。仿真结果表明,所提方案在满足终端个性化需求的同时能够有效地降低解码时延和完成时间。
In order to meet the individual needs of end users and reduce the transmission delay of D2D networks,this paper proposed an instantly solvable network coding(IDNC)cooperative retransmission scheme based on terminal differentiation.First of all,this scheme proposed a new IDNC algorithm framework for the decoding conflict and transmission conflict in PC-D2D network,and searched for a maximal independent set(MIS)on the basis of this framework.It designed the weights by considering user requirements and link packet loss rate,and selected the weights to generate coded packets by combining the concurrent cooperative retransmission terminal with the smallest retransmission delay increment and data packets.At the same time,considering the future decoding opportunities provided by unnecessary data packets,it optimized the data packets that the terminal didn’t need to further reduce the transmission delay.The simulation results show that the proposed scheme can effectively reduce the decoding delay and completion time while meeting the personalized needs of the terminal.
作者
姚玉坤
陈鑫垚
羊杰
Yao Yukun;Chen Xinyao;Yang Jie(School of Communication&Information Engineering,Chongqing University of Posts&Telecommunications,Chongqing 400065,China)
出处
《计算机应用研究》
CSCD
北大核心
2022年第8期2448-2453,共6页
Application Research of Computers
基金
国家自然科学基金资助项目(61971080)。
关键词
D2D
立即可解网络编码
协作重传
解码冲突
传输冲突
终端差异化
D2D
IDNC coding
cooperative retransmission
decoding conflict
transmission conflict
terminal differentiation
作者简介
姚玉坤(1964-),女,教授,硕导,主要研究方向为无线网络编码(2605409066@qq.com);陈鑫垚(2000-),女,硕士研究生,主要研究方向为无线网络编码;羊杰(1997-),男,硕士,主要研究方向为无线网络路由协议.
