一种高效低时延的RPL跨层优化机制  

An Efficient and Low-Latency RPL Cross-Layer Optimization Mechanism

作　　者：姚玉坤[1,2] 朱克兰 杨迪 赵子军 YAO Yukun;ZHU Kelan;YANG Di;ZHAO Zijun(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Key Laboratory of Mobile Communication 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：《计算机工程》2021年第4期141-146,179,共7页Computer Engineering

基　　金：国家自然科学基金(61379159);重庆市基础与前沿研究计划项目(cstc2015jcyjBX0085)。

摘　　要：低功耗有损网络路由协议RPL中的路由度量存在一定局限性,从而导致网络拓扑不均衡以及数据传输路径非最优等问题。提出一种高效低时延的RPL跨层优化机制CL-ORPL。综合考虑网络深度、链路队列利用率以及期望传输次数等多种度量,以完善最优父节点选择机制。目的地通告对象确认消息(DAO-ACK)携带上一跳节点信息,通过跨层旁听DAO-ACK消息建立两跳横向路由。仿真结果表明,CL-ORPL机制的数据传输平均端到端时延、数据传输成功率以及网络生存时间等性能优于RPL和QU-RPL协议。The limitations of routing metrics in RPL in Low-power and Lossy Networks(LLN)lead to imbalanced network topology and unreasonable data transmission path.This paper proposes an efficient and low-latency RPL crosslayer optimization mechanism,CL-ORPL.Based on the network depth,path queue utilization,number of expected transmission times and other metrics,the selection mechanism of the optimal parent node is improved.Then the horizontal two-hop route is established through the cross-layer listening of the DAO-ACK message carrying the node information of the previous hop.Simulation results show that the CL-ORPL mechanism is superior to RPL and QU-RPL protocols in terms of average end-to-end data transmission delay,success rate of data transmission and network lifetime.

关 键 词：低功耗有损网络 路由协议 负载均衡 点对点通信 跨层旁听 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]