BLE Mesh网络中的机会路由协议优化  

Opportunistic routing protocol optimization in BLE Mesh network

作　　者：孙吉武 江凌云[1] SUN Jiwu;JIANG Lingyun(College of Telecommunications & Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2018年第6期90-95,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金重大项目(61427801)资助项目

摘　　要：机会路由是当前无线多跳网络中常用的路由技术。然而若将传统机会路由用于BLE Mesh网络中,则会产生由于高计算复杂度造成的能耗过高和由于网络拓扑不稳定造成的路由链路维护困难。针对这些问题,文中提出了一种适用于BLE Mesh网络的机会路由优化协议,利用BLE广播的随机扰动改进了回调计时器,并且利用ACK包将局部的链路改变扩散至全网。与BLE Mesh网络现有的洪泛协议相比,该协议减小了网络的额外开销和阻塞概率,提升了网络的通信效率;与经典SOAR路由协议相比,该协议优化了协调策略和后备节点维护策略,使其适应了BLE Mesh网络的特点,减小了通信时延,同时提升了吞吐量。Opportunistic routing is a common routing technology in current wireless multi-hop network.However,if the traditional opportunistic route is utilized in a bluetooth low energy(BLE) Mesh network,some problems will occur,i. e.,high energy consumption due to high computational complexity and thedifficulty in maintaining the routing link due to the instability of the network topology. To solve these problems,an opportunistic routing optimization protocol for BLE Mesh network is proposed. The random disturbance of BLE broadcasting is used to improve the callback timer,and uses ACK packets to spread partial link changes to the entire network. Compared with the existing flooding protocol of BLE Mesh net-work,the protocol can reduce the extra overhead and blocking probability of the network while improvingthe communication efficiency of the network. Compared with the classical SOAR routing protocol,the protocol optimizes the coordination strategy and the maintenance strategy for backup nodes,it is suitable forthe characteristics of the BLE Mesh network,thus reducing the communication delay and improving thethroughput.

关 键 词：机会路由 蓝牙低功耗 MESH网络 自配置 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]