Link cost optimization for traffic controlling in heterogeneous network

Due to the nature of various types of end-to-end mobile devices in heterogeneous network, congestion was one of the main problems in heterogeneous networks. This paper proposes a congestion aware routing approach based on the evaluation of weight value as a link cost index. The link cost evaluation considers the evaluation of buffer delay, data rate, MAC overhead and link quality. This approach uses a multipath routing approach which discovers multiple disjoint routes from a source to destination having heterogeneity between each other. Among the discovered routes, the route with minimum cost index is selected, which is based on the node weight of all the in-network nodes from the source node to the destination node. By simulation results, the proposed approach has proved that it attains high packet delivery ratio, low routing overhead and also low end-to-end delay.