Combining local channel selection with routing metrics in multi-channel Wireless Mesh Networks

Dynamic metric is a well-known method to improve performance of WMNs (Wireless Mesh Networks). By quantifying quality of links, and by computing optimal paths based on the values, dynamic metrics enable packets to be forwarded with high-quality links while avoiding low-quality links. ETX [1] would be the best-known dynamic metric, which measures the average retransmission count on a link via periodically transmitted probe packets. Many dynamic metrics have been proposed so far, which include those for multi-channel WMNs such as WCETT [2] and MIC [3]. They proved that dynamic metrics improve network performance in multi-channel environments by pursuing relatively slow transition of link quality.