An efficient k-level traffic control scheme with congestion awareness in wireless mesh networks
International Journal of Ad Hoc and Ubiquitous Computing
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In this paper, we propose a load balancing strategy thathas the following features: (1) estimating the potential loadof real gateways with low computation and no communicationoverhead, (2) asynchronous alarm sent when the utilizationof a real gateway exceeds a critical threshold, and(3) WAP-awareness. We also propose a scalable WAP gateway(SWG) that consists of a WAP dispatcher and a clusterof real gateways. The WAP dispatcher is a front-end distributorwith our load balancing strategy. To prevent the WAPdispatcher from becoming a bottleneck, the WAP dispatcherdistributes mobile clients' requests in kernel space and doesnot process outgoing gateway-to-client responses. Experimentalresults show that our SWG has better load balancingperformance, throughput, and delay compared to the LVSand the Kannel gateway. Although WAP services are notso popular as expected, our load balancing strategy can beeasily adapted to other distributed services.