IEEE 802.11s路由切换分析与改进

Analysis and improvement of route switch in IEEE 802.11s

分析了IEEE 802.11s中混合无线mesh协议的路由切换行为,并针对切换过程中的分组丢失问题做出了改进。在IEEE 802.11s的mesh对等连接管理协议中加入基于接收信号强度的门限判定机制,通过控制对等连接状态改变HWMP的路由切换时机,避免了路由切换时的分组丢失。实验结果表明在节点低速移动的不受控无线环境中,相比传统的IEEE 802.11s,该改进方案的分组丢失率下降了2%~5%。

Analyzed the route switch of hybrid wireless mesh protocol（HWMP） in IEEE 802.11s and made an improve-ment to reduce the packet lost rate when routes switching was analyzed.Based on the received signal strength indica-tor（RSSI） a scheme with judgment threshold in mesh peer link management protocol was proposed,which controlled the status of peer link to change the timing of route switch.In this way,the packet lost was avoided.The experimental results show that the improvement reduces the packet lost rate by 2%~5% compared with traditional IEEE 802.11s in uncon-trolled wireless environment when nodes moving in low speed.