一种改进的基于地理位置的无线Mesh网络路由协议  

Improvement on Location-based Routing Protocols in Wireless Mesh Networks

作　　者：任伟[1] 董育宁[1] 赵海涛[1] 

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）》2012年第1期75-83,共9页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60972038);江苏省高校自然科学重大基础研究项目(07KJA51006);东南大学移动通信国家重点实验室开放研究基金(N200911);江苏省高校研究生科研创新计划(CX09B_149Z);中兴通讯股份有限公司基金资助项目

摘　　要：提出了一种基于地理位置的干扰感知路由协议IAPR(Interference Aware Progress Routing),该算法通过感知无线信道的干扰特征对贪婪转发和空洞绕行过程进行改进。在贪婪转发模式下,通过权衡转发距离与链路质量以及信道接入难度实现对下一跳节点的选择,使得分组在保证转发距离的基础上选择更有利于传输的链路;当分组到达了局部最小点时,启用基于竞争的机会式转发。在竞争因素中加入了分组由空洞绕行模式回到贪婪转发模式可能性的因素,在空洞边缘处帮助分组转回到贪婪模式的邻居节点将在竞争中获得最高的优先级,继而获得首先转发的机会。NS2仿真实验结果表明,IAPR路由算法能够更好的实现分组转发,提高分组的传输效率。A locationbased interference aware routing protocol IAPR is proposed, which aims to improve the performance of greedy forwarding and void detour through interference sensing of wireless channels. In the greedy forwarding mode, through the next hop selection process based on the tradeoff between for warding distance, link quality and difficulty of channel access, better transmission link can be selected with the guarantee of packet forwarding distance. An competition based opportunistic forwarding mode is initiated when the packet forwarding reaches a local minimum. The competition considers the possibility of packet forwarding mode retreating from void detour to greedy forwarding, during which the neighboring node assisting the forwarding mode retreating will gain the highest priority in the competition, leading to the opportunity of first one to forward packet. NS2 simulation results have shown that IAPR protocol can better realize packet forwarding and enhance packet transport efficiency.

关 键 词：无线MESH网络 基于地理位置的路由 跨层技术 机会转发 

分 类 号：TN919[电子电信—通信与信息系统]