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无线信道干扰和负载分布的不均衡严重影响无线Mesh网络吞吐量、端到端延时和资源利用率。在已有基于信噪比和邻居节点个数的干扰模型基础上,进一步研究了无线Mesh网络的链路干扰。在综合考虑了无线Mesh网络流间干扰和和流内干扰的基础上,提出路由判据PIL(Path Interference Level)。在此基础上,提出一种新的基于干扰感知的负载均衡路由协议IA-DSR(Interference-Aware DSR)。IA-DSR考虑无线网络拥塞并选择受到干扰最小的路径。仿真结果表明,在不显著增加开销的情况下,IA-DSR可以有效地提高网络的整体吞吐量,降低网络端到端时延和丢包率。
The unbalanced wireless channel interference and load distribution seriously affect the throughput, end-to-end delay and resource utilization of wireless Mesh networks. Based on the existing interference models based on signal-to-noise ratio and the number of neighbor nodes, the link interference of wireless Mesh networks is further studied. Based on the consideration of inter-stream interference and intra-stream interference in wireless Mesh networks, the routing criterion PIL (Path Interference Level) is proposed. On this basis, a new interference-aware load balancing routing protocol IA-DSR (Interference-Aware DSR) is proposed. IA-DSR considers wireless network congestion and chooses the path that is least disturbed. The simulation results show that IA-DSR can effectively improve the overall throughput of the network and reduce the end-to-end delay and packet loss rate of the network without significantly increasing the overhead.