Channel Adaptive Routing Algorithm in Mobile Ad Hoc Networks

H. Tian, F. Xie, N. Yang, and P. Zhang (PRC)


wireless networks, ad hoc networks, routing


Routing in MANET (Mobile Ad Hoc Network) is a challenging due to the dynamic nature of network topology and the resource constraints. To maximize the channel resource utilization and minimize the network transfer delay along the path, the shortest path with minimum hops scheme is often adopted. However, the quality of wireless channel among the mobile nodes is time varying due to fading, shadowing and pathloss. Considering adaptive channel coding and modulation scheme, the channel states can be characterized by different link throughput. If routing selection based on the link throughput is implemented, the minimum transfer delay from source to destination and the maximal throughput may be obtained. In this paper, we take the condition of receiver into account, and present a channel adaptive routing based on receiver (BR-CASPR). The link cost is formed according to the channel quality and the delay that packets may experience in a node. The BR-CASPR finds the shortest routing according to the defined cost measure. Simulation results show that if there is a proper weight between the channel quality and delay factor in total cost, the delay performance may be improved compared to CASPR.

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