Investigating the Effect of Noise-Level on Probabilistic Broadcast in Noisy MANETs

Wireless communication channels in mobile ad hoc network (MANETs) suffer from high packet-loss due to presence of noise. This paper presents a detail description of a simulation model that can be used to evaluate the performance of probabilistic broadcast for flooding in noisy environment. In this model, the noise-level is represented by a generic name, probability of reception (p c) (0 � pc �1), where p c=1 for noiseless and p c<1 for noisy. The effect of noise is determined randomly by generating a random number ξ (0�ξ<1); if ξ�pc means the packet is successfully delivered to the receiving node, otherwise, unsuccessful delivery occurs. The proposed model is implemented on a MANET simulator, namely, MANSim. In order to investigate the effect of noise on the performance of probabilistic broadcast in noisy MANETs, four scenarios were simulated. The main conclusions of these scenarios are: The performance of probabilistic broadcast decreases with decreasing p c. The percentage relative change in performance decreases with increasing nodes retransmission probability, number of nodes, and nodes radio transmission range. The various nodes speed has insignificant effect on the performance.

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