Qos Based Joint Channel Assignment and Routing in Wireless Mesh Networks
Ibrar Ali Shah, Sadaqat Jan, Imran Ali Khan · 2014
2 Abstract: In this paper, channel assignment and routing problems have been investigated for Wireless Mesh Networks (WMNs). A dynamic and distributed channel assignment protocol has been proposed which generates the network topologies ensuring less interference and better connectivity. The proposed channel assignment protocol is capable of detecting the node failures and mobility in an efficient manner where the channel monitoring module precisely records quality of bi-directional links in terms of link delays. In addition, a Quality of Service based Multi-Radio Ad-hoc On Demand Distance Vector (QMR-AODV) routing protocol has been devised. QMR-AODV is multi-radio compatible and provides delay guarantees on end-to-end paths. The inherited problem of AODV's network wide flooding has been solved by selectively forwarding the routing queries on specified interfaces. Simulation results show that the QoS based delay routing metric, combined with the selective route request forwarding, reduces the routing overhead from 24% up to 36% and produces 40.4% to 55.89% less network delays for traffic profiles of 10 to 60 flows, respectively.