无线传感网中基于网络编码的机会路由协议研究

发布时间：2018-04-02 12:08

本文选题：无线传感器网络　切入点：机会路由　出处：《南京邮电大学》2017年硕士论文

【摘要】：无线传感器网络(WSN)是近年来热门研究领域。而作为其关键技术之一,路由协议设计的好坏将影响着网络的性能。对于无线传感器网络中链路动态、多变、丢失的特点,传统路由协议已不能很好地应对。而机会路由充分利用无线信道广播的特性,保证了数据传输的可靠性。同时引入网络编码的机会路由协议,解决了节点间的协调问题。本文针对无线传感器网络能量受限的特点,设计了能量均衡的机会路由协议MMORE。在MMORE协议中,综合考虑节点间的链路质量和节点的剩余能量与能耗,设计了一种新的度量值“期望生存时间”度量,并以此度量为基础,给出了最佳候选转发节点集选择算法,优化候选转发节点集中的节点数量,以最小的生存时间消耗代价转发数据分组,延长网络生存时间。仿真结果表明,相比于MORE协议以及MT-NCOR协议,MMORE协议改善了节点能耗不均的现象,从而延长网络生存时间。针对基于网络编码的机会路由协议存在数据分组冗余转发的问题,本文设计了一种基于编码系数反馈确认的机会路由协议CCFAOR。在CCFAOR协议中,利用编码数据分组中携带的编码向量,下游节点在转发编码数据分组时携带一个编码反馈向量;上游节点通过侦听获取编码反馈向量并通过比较分析,判断下游节点的接收情况而决定是否停止编码数据分组的发送。另外,利用编码反馈向量标记缓存的数据分组,避免缓存的编码数据分组多次参与随机线性网络编码。仿真结果表明,相比于MORE协议以及CCACK协议,CCFAOR协议可以有效地减少网络中冗余编码数据分组的传输,同时网络的吞吐量有了一定的提高。
[Abstract]:Wireless sensor network (WSN) is a hot research field in recent years. As one of the key technologies, the design of routing protocol will affect the performance of the network. For dynamic link, wireless sensor network is changeable, loss characteristics, traditional routing protocols cannot cope with the good opportunity. Make full use of the characteristics of wireless channel routing broadcast, to ensure the reliability of data transmission. At the same time, the introduction of network routing protocol encoding opportunity, solve the coordination problems between nodes. According to the characteristics of limited energy of wireless sensor network, designed the energy balance of the opportunity of MMORE. routing protocol in the MMORE protocol, the residual energy and energy consumption considering the link quality between nodes and nodes the design of a new measure "expected survival time" measure, and based on this metric, given the best candidate nodes set selection algorithm, The number of forwarding nodes to optimize the candidate set, with the minimum survival time expense of forwarding data packets, prolong the survival time of the network. The simulation results show that compared to the MORE protocol and MT-NCOR protocol, the MMORE protocol improves the uneven energy consumption of the nodes, and prolong the survival time of the network. Aiming at the problems of redundant data packet forwarding routing protocol network encoding opportunity based on this paper, based on the design of a feedback coefficient encoding confirmation of the opportunistic routing protocol CCFAOR. in CCFAOR protocol, carrying the encoding vector using the encoding data packet, the downstream nodes in forwarding encoding data packet carries a feedback vector encoding; upstream nodes to obtain feedback through a comparative analysis of vector encoding by interception. The reception of the downstream node and determine whether to stop encoding decided to send packets. In addition, the use of feedback to the encoding The amount of labeled data packet buffer, avoid encoding data packet buffer participated in random linear network encoding. The simulation results show that compared to the MORE protocol and CCACK protocol, CCFAOR protocol can effectively reduce the transmission of redundant encoding data packets in the network, and the network throughput is improved.

【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;TP212.9

【参考文献】