Routingmetric helps select optimal path fromsource node to destination node. It is the key for the whole network performance and\nneeds to be designed carefully. Existing routing metrics have at least one of the limitations listed below. (1) Internet-oriented traffic\nis considered only, and client-oriented traffic is omitted, or vice versa. (2) Route selection is done in mesh network with a single\ngateway, so route selection is only related to selecting a route path without selecting gateway node. (3) The isotonic requirement\ncannot be satisfied. In order to conquer the limitations aforementioned and guide route selection, an isotonic differentiated service\nbased interference-aware routing metric is proposed for mesh networks withmultiple gateways. Traffic pattern, node load, gateway\nload, and intraflow and interflow interference are all taken into consideration to guide the selection of best path and best gateway.\nSimulations reveal that the proposed metric outperforms state-of-art metrics in terms of the average network throughput and\naverage end-to-end delay.
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