Impact of Mobile Sink for Wireless Sensor Networks Considering Different Radio Models and Performance Metrics

In this work, we investigate how WSN performs in the case when sink node moves using different radio models and metrics. We consider routing efficiency, delay and number of received packet metrics to evaluate the performance of WSN using AODV routing protocol, lattice topology, and TwoRayGround and Shadowing radio models. We evaluate the performance of WSN by simulations. The performance evaluation results show that for small number of sensor nodes, the RE of Shadowing radio model is better than TwoRayGround model. However, for high node density, the RE of TwoRayGround model is better than Shadowing radio model. When Tr is less 10, the delay of Shadowing model is better than TwoRayGround model. However, for Tr larger than 100, the delay of TwoRayGround model is better than Shadowing model. With increase of the number of nodes, the number of received packets is also increased. For TwoRayGround model, when Tr is less than 10, the number of received packets for 16, 64, and 100 nodes is almost the same. However, comparing TwoRayGround model with Shadowing model, for the same time interval and for the same number of nodes, the number of received packets of TwoRayGround model is better than Shadowing model.