Congestion aware load balancing for multiradio Wireless Mesh Network

A new kind of wireless multi-hop network architecture called Wireless Mesh Network (WMN) has recently attracted much attention. In this paper, we propose congestion aware multipath routing protocol called EAOMDV-LB for multi-radio multiple interface wireless mesh networks (WMN). The protocol calculates multiple paths using proposed airtime congestion aware (ACA) metric and performs load balancing by computing queue utilization of multiple interfaces of a node. Moreover, the effective load balancing technique maintains data transmission on optimal path by diverting traffic all the way through congested area. WMNs have recently gained a lot of popularity due to their rapid deployment, instant communication capabilities and support for many types of application. For these applications, network congestion is the main reason for lower throughput and longer delay. Most of the present routing protocols for WMN´s are not designed to adapt congestion and optimal link quality. The simulation results using ns2 reveal that our proposed load balancing scheme performs better than AOMDV in terms of throughput, end-to end delay with high traffic density.