基于WCETT的多信道WMN路由量度的研究

WCETT-based Routing Metrics for Multi-Channel WMN

多信道无线Mesh网络可以有效解决在多跳无线网络中容量下降的问题。然而现有的路由协议大部分为单信道的多跳无线网络所设计,对于多信道WMN而言,会导致无效的路由路径。分析了现有无线Mesh网络的路由算法,详细讨论了基于WCETT(Weighted Cumulative Expected Transmission Time)的两种路由度量,在此基础上提出了一种新的路由量度WCETTR-LB,其对链路信道干扰的估算更加精确,能够感知周围链路对本信道的潜在干扰,并且考虑了节点负载度的概念,更加有助于实现负载均衡。

Multi-Channel WMN （Wireless Mesh Network） could effectively solve the problem of capacity drop in multi-hop wireless network. However, the existing routing schemes designed for single channel multi-hop wireless networks might lead to inefficient routing paths in multi- channel WiNs. The existing routing algorithms in WMNs are analyzed, then the two routing metrics based on WCETT （Weighted Cumulative Expected Transmission Time） discussed in detail. And on this basis, a new routing metric WCETTR-LB is proposed. WCETTR-LB could more accurately estimate channel interference and detect potential interference around the channel link. In addition, the degree of node load is considered, thus to help achieve load balancing.