LLN中移动感知的节能父节点选择算法  

A mobile aware energy⁃saving parent node selection algorithm in LLN

作　　者：姚玉坤[1,2] 罗杰 何亮 任智[1,2] YAO Yukun;LUO Jie;HE Liang;REN Zhi(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Chongqing Key Laboratory of Mobile Communications Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《南京邮电大学学报（自然科学版）》2023年第2期76-84,共9页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61971080)资助项目。

摘　　要：针对低功耗有损网络现有移动性支持路由算法中父节点切换频繁、移动检测机制使用不可靠的瞬时路由度量、未考虑链路质量对能耗影响等问题,提出一种基于剩余通信时间(Remaining Communication Time, RCT)的移动感知节能父节点选择算法。首先,为了降低父节点切换次数并节省节点能耗,构建了基于RCT和通信成本的父节点选择函数,移动节点基于该函数值选择下一父节点。其次,为了避免在移动场景下由于瞬时路由度量不可靠而导致的不必要的父节点切换,在算法的移动检测阶段提出一种基于接收信号强度指标(Indicator of Received Signal Strength,RSSI)和RCT值的移动检测机制,父节点需要结合RSSI和RCT两个值来共同判断移动节点是否需要进行父节点切换。理论分析和仿真结果表明,算法在控制开销、网络生存时间、能耗等方面的性能均得到了提升。Current mobility support routing algorithms for low power and lossy networks have to face multi⁃problems,including frequently switching parent nodes,using unreliable instantaneous routing measurement for the mobile detection mechanism,and ignoring the impact of link quality on energy consumption.Therefore,this paper proposes a mobile aware energy⁃saving parent node selection algorithm(RCT⁃RPL)based on remaining communication time(RCT).First,in order to reduce the switching times of the parent node and save the energy consumption of the node,a parent node selection function based on RCT and communication cost is constructed,and the mobile node selects the next parent node based on the function value.Second,in order to avoid unnecessary switching of parent nodes due to unreliable instantaneous routing metrics in mobile scenarios,a mechanism based on the indicator of received signal strength(RSSI)and RCT value is proposed for mobile detection.In the mobile detection mechanism,the parent node needs to combine the two values of RSSI and RCT to determine whether the mobile node needs to perform parent node handover.Theoretical analysis and simulation results show that the performance of the algorithm is improved in control cost,network lifetime and energy consumption.

关 键 词：低功耗有损网络 能量消耗 移动检测 通信成本 剩余通信时间 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]