基于置信区域设置的低功耗有损网络路由  

Connfidence Regions-Based Routing Protocol for Low-Power and Lossy Networks

作　　者：臧景才 刘萍 ZANG Jing-cai;LIU Ping(School of Continuing Education,Qinghai Open University,Xining 810000,China;Network Center,Henan Normal University,Xinxiang 453007,China)

机构地区：[1]青海广播电视大学继续教育学院,青海西宁810000 [2]河南师范大学网络中心,河南新乡453007

出　　处：《测控技术》2020年第6期121-127,共7页Measurement & Control Technology

基　　金：国家自然科学基金项目(U1604602)。

摘　　要：现有多数低功耗有损网络路由(RPL)协议没有考虑真实环境中移动节点的定位误差。为此,提出基于移动节点置信区域的低功耗有损路由协议,记为KPRPL。KPRPL协议考虑了静态和移动两类节点,并正视真实环境下的定位误差。在静态节点间路由,KPRPL协议考虑传统的期望传输次数(ETX)为路由度量;而针对有移动节点参与的路由,采用新的RPL度量。每个移动节点依据信道条件产生置信区域,利用Kalman滤波修正移动节点位置。再依据经Kalman滤波后的修正位置和方差,移动节点重新构建置信区域,并形成候选锚节点集。最终,移动节点利用端到端ETX估计值,选择最优的路径。仿真结果表明,与传统的RPL协议相比,KPRPL协议提高了在恶劣环境下的可靠性和鲁棒性。Most of existing routing protocols for low-power and lossy networks(RPL)do not consider the inevitable positioning errors of mobile nodes in real network.Therefore,routing protocol for low-power and lossy networks(KPRPL)based on confidence regions of mobile nodes is proposed,which is a new routing strategy for static nodes and mobile nodes.The objective of the proposed KPRPL is to provide robust and reliable routing,considering the positioning errors that occur in real WSNs.For routing among static nodes,KPRPL uses the same routing mechanism as the original RPL.For routing among mobile nodes,KPRPL introduces positionbased routing,which uses a new RPL metric.Each mobile node generates its own confidence region that included its most likely positions,considering the channel conditions.Then,the position is refined using Kalman filtering.Considering the refined position and its variance after the Kalman filtering,the mobile nodes reconstruct their confidence regions,and form candidate anchor nodes set.Finally,the mobile nodes used end-to-end ETX estimates to select the best routing path.The simulation results show that the reliability and the robustness of the network under harsh conditions are improved compared with geographical routing.

关 键 词：无线传感网 低功耗有损网络路由协议 路由度量 移动节点 置信区域 KALMAN滤波 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]