抗多流干扰的感知网络编码路由与负载均衡  

Aware Network Coding Routing and Load Balancing for Anti-Multi-Stream Interference

作　　者：刘超[1,2] 吴诚 包建荣[2] 姜斌[2] LIU Chao;WU Cheng;BAO Jianrong;JIANG Bin(Information Engineering School,Hangzhou Dianzi University,Hangzhou 311305,China;School of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学信息工程学院,杭州311305 [2]杭州电子科技大学通信工程学院,杭州310018

出　　处：《北京邮电大学学报》2023年第5期53-59,共7页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(U1809201);浙江省属高校基本科研业务费专项项目(GK209907299001-003);浙江省普通本科高校“十四五”教学改革项目(jg20220225);2020年度高等学校国内访问学者“教师专业发展项目”(FX2020010)。

摘　　要：为了解决现有编码感知路由算法存在多流干扰和路由度量适用范围小等问题,提出了抗多流干扰的物理层网络编码路由和负载均衡方案。首先,根据无线网络时变特征,通过节点的路由请求和应答过程,分析节点在空间上的相对位置,并选择合适的网络节点进行解码;其次,利用时变无线网络的特性,计算动态数据分流比例,从而减小中间节点的拥塞;最后,在解决多流干扰的基础上,提出了一种由误码率构成的新的路由度量,扩大了编码感知路由的适用范围。仿真实验结果表明,当误码率为10-4时,相较于编码机会实体结构(COPE)方案,用所提方案译码时所需的信噪比降低了约6%;当信噪比为10 dB时,相较于COPE方案,用所提方案物理层预期传输次数平均减少了约0.25次。To solve problems of node decoding failure caused by multi-stream interference in wireless communication networks and high complexity.A network state information aware opportunistic physical layer network coded routing in multi-stream wireless networks and load balancing scheme is proposed.According to the time-varying characteristics of wireless networks,it uses two processes of routing request and response,and analyzes the relative positions of nodes in space to perform a reasonable selection of network topology.The scheme uses the relative spatial position between nodes to reasonably select the network topology,calculate the dynamic data distribution ratio,and reduce the congestion of intermediate nodes.A new routing metric based on bit error rate(BER)calculation is proposed to expand the scope of code-aware routing based on solving multi-stream interference.The simulation shows that when the BER is 10-4,network state information-aware physical layer network coding routing scheme against multi-stream interference compared with the coding opportunity entity(COPE)schemes,the proposed scheme reduces the required signal-to-noise ratio by about 6%,compared with the COPE scheme,the proposed scheme reduces the expected transmissions count metric of the required physical layer by 0.25 times under the same BER.Therefore,the scheme can be used in the space-ground integration network under multi-stream interference.

关 键 词：网络状态信息 多流干扰网络 预期传输次数 物理层网络编码路由 中断概率 

分 类 号：TN927.2[电子电信—通信与信息系统]