一种快速低开销的移动节点分布式寻路RPL路由协议

针对低功耗有损网络(Low Power and Lossy Network, LLN)中移动节点作为中继节点时，存在无线链路易断开、数据传输成功率较低和控制开销较高的问题，提出了一种快速低开销的移动节点分布式寻路RPL路由协议(Mobile Node Distributed Pathfinding RPL Routing Protocol, MNA-RPL)。首先，提出一种邻居表自适应更新机制，依据邻居表快速切换父节点；其次，提出一种父子节点双断开机制，能够有效减少数据包丢失；最后，提出一种基于速度动态管理的Trickle计时器，根据自身速度动态调整DIO广播周期。理论分析和仿真结果表明，与主流路由协议相比，该协议在数据传输和控制开销等方面的性能均有一定的提升。

A fast and low cost mobile node distributed pathfinding RPL routing protocol

For the problems of wireless chain louie disconnection,low success rate of data transmission and high control cost when mobile nodes serve as relay nodes in low power and lossy network(LLN) network,a fast and low cost mobile node distributed pathfinding RPL routing protocol(MNA-RPL) based on parent node switching is proposed.Firstly,an adaptive updating algorithm of neighbor table is proposed,which can quickly switch parent node according to neighbor table.Secondly,a father-child node double disconnection mechanism is proposed to reduce packet loss effectively.Finally,a Trickle-timer based on dynamic speed management is proposed,which dynamically adjusts the DIO broadcast cycle according to its own speed.Theoretical analysis and simulation results show that the performance of the proposed protocol is improved in both data transmission and cost control in comparison with that of the state of tha art.