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Throughput performance of routing protocols based on SNR in wireless mobile ad hoc networks

Routing protocols play important roles in mobile adhoc network performance. The Protocols find and decided the communication path with the routing algorithm to deliver the data along the networks. Channel qualities in wireless communication are an important factor in network performance. Previous research in routing protocol development did not much pay attention in this matter. This paper shows the routing algorithm which not concern with this channel quality cannot adapt well in Mobile Adhoc Networks (MANET). We evaluated reactive routing protocol in deterministic and probabilistic propagation models, which are two-rayground and shadowing. These models are used to predict the received signal power of each packet. The result shows the degradation of routing protocol performance in more realistic environment, which is shadowing propagation model. Then we used mathematical analysis based on throughput performance related to the probability of error and Signal to Noise Ratio (SNR). Routing protocols face uncertainty in link quality when the topology of the network became dynamic. The routing protocols have to consider channel quality in the link transmission to acquire higher throughput performance.