基于节点编码感知的机会转发路由协议  

An opportunistic forwarding routing protocol based on node network coding-aware

作　　者：姚玉坤[1] 王宇[1] 吕盼成 

机构地区：[1]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065

出　　处：《电子技术应用》2017年第9期119-122,共4页Application of Electronic Technique

基　　金：重庆市科委自然科学基金资助项目(cstc2012jjA40040)

摘　　要：针对现有考虑节点编码机会的编码感知路由协议Ex CAR(a coding-aware routing protocol termed extended coding aware routing)在无线链路不稳定的情况下转发节点集内的节点在计算编码机会时可能产生误判,以及在转发节点集内选择最优编码节点时需要交换大量的数据包缓存信息会导致较大的端到端时延和网络开销等问题,提出一种适用于多跳无线网络的节点编码感知机会转发路由协议NAOFP(node network coding aware opportunistic forwarding routing protocol)。NAOFP协议通过引入基于侦听概率的附加ID信息添加机制和转发节点集的最优转发节点选择机制,提高了网络吞吐量和编码包的解码成功率,减小了数据包的平均端到端时延。仿真结果表明,与Ex CAR协议相比,NAOFP协议在网络吞吐量、平均端到端时延、编码包的解码成功率等方面的性能均得到了有效的改善。The existing coding-aware routing protocols may have the problems of misjudging coding opportunities under unstable link state and requiring exchanging huge packets information in selecting the optimal coding node from forwarder set which could lead to large end-to-end delay and high network overhead. To solve these problems, a node network coding aware opportunistic forwarding routing protocol( NAOFP) is proposed by this paper. By introducing two mechanisms of adding additional ID based on high probability of intercept and the optimal forwarding node selection in forwarder set, the NAOFP protocol has obvious advantages in improving the network throughput and the probability of decoding and also reducing the end-to-end delay. Simulation results show that, compared with Ex CAR, the NAOFP protocol has a better performance in network throughput, end-to-end delay and the probability of decoding.

关 键 词：多跳无线网络 网络编码 编码感知 机会转发 侦听概率 

分 类 号：TN915.04[电子电信—通信与信息系统]