Adaptive Routing Scheme for Emerging Wireless Ad Hoc Networks

Node mobility causes fading wireless channels, which in turn renders topology changes in emerging wireless ad hoc networks. In this paper, on-line estimators and Markov models are utilized to estimate fading channel conditions. Using the estimated channel conditions as well as queue occupancy, available energy and link delay, approximate dynamic programming (ADP) techniques are utilized to find dynamic routes, while solving discrete-time Hamilton-Jacobi-Bellman (HJB) equation forward-in-time for route cost in multichannel multi-interface networks. The performance of the proposed load balancing method in the presence of fading channels and the performance of the optimal route selection approach for multi-channel multi-interface wireless ad hoc network is evaluated by extensive simulations and comparing it to AODV.