无线传感器网络多优先级数据收集机制  

Multi‑priority Data Collection Mechanism for Wireless Sensor Network

作　　者：黄太奇 谢荣平[1] 卢德兼[1] HUANG Taiqi;XIE Rongping;LU Dejian(The 28th Research Institute of China Electronics Technology Group Corporation,Nanjing 210007,China)

机构地区：[1]中国电子科技集团公司第二十八研究所,南京210007

出　　处：《指挥信息系统与技术》2020年第6期59-64,共6页Command Information System and Technology

基　　金：装备发展部“十三五”预研课题资助项目。

摘　　要：针对具有多个信源节点、多个中继节点及一个目的节点的两跳拓扑结构的无线传感器网络,提出了一种基于分布式喷泉码的多优先级数据收集方案。数据收集的中继初始化阶段,仅允许较高重要等级信源节点数据包参与编码,以便对其提供更高等级的保护;中继优化阶段,目的节点通过反馈信道将以单分图表示的关键解码信息发送到编码端,编码端根据图论理论优化编码端策略,以改善传统的基于不等差错喷泉码数据收集方案中次重要等级数据译码性能不佳的现象。仿真试验结果表明,通过适当利用反馈信道,该方案在提升次重要等级数据译码性能的同时,可提供更优的不等差错保护性能,从而提升无线传感网络数据的整体传输质量。The multi-priority data collection scheme based on distributed fountain code is proposed for wireless sensor networks(WSN)with multiple source nodes,multiple relay nodes and one destination node in two-hop topology.During the relay initialization stage of data collection,only higher-level important source node packets are allowed to participate in the encoding to provide a higher level of protection.In the relay optimization stage,the target node sends the key decoding information represented by a uni-partite graph to the encode through the feedback channel,and the encoder optimizes the coding strategy according to the graph theory to improve the poor performance of the sub-critical data decoding in the traditional unequal error fountain code data collection scheme.The simulation results show that the scheme can not only improve the decoding performance of sub-critical data,but also provide better unequal error protection performance by using the feedback channel properly,thus it can improve the transmission performance of WSN.

关 键 词：无线传感器网络 喷泉码 分布式喷泉码 不等差错保护 单分图 

分 类 号：P237[天文地球—摄影测量与遥感]