A New Congestion Avoidance and Mitigation Mechanism Based on Traffic Assignment Factor and Transit Routing in MANET

Data communication through wireless channels faces a challenging issue toward congestion and link quality variation. Regardless of mobile or stationary nodes in the network, the link in between the nodes experiences a fluctuation in link quality. Congestion is an intriguing issue, which occurs when there is deterioration in QoS at the link which transports data. This paper describes that an Internet network which is basically a backbone network with wired connection can be utilized for not just Internet services availability but also for mitigating congestion in a network. Data traffic in between nodes in a Mobile Ad hoc Network (MANET) can also be diverted through this backbone network to opt congestion-less environment and higher throughput. This technique is called as transit routing. The proposed protocol is compared with the uniform traffic allocation scheme. The experimental results prove that the proposed method outperforms the existing ones against congestion. It also reduces the packet drop ratio and increases system reliability.