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For the application of wireless sensor networks, the perceptive information without location information is meaningless. With the popularity of mobile devices, the mobile node localization problem is attracting more and more researches. This paper, we proposed a localization algorithm. The proposed algorithm minimizes the range of sampling node by using the node's movement trajectory. This improves the efficiency of sampling and the positioning accuracy. Simulation results showed that our algorithm improves the positional accuracy.

Recent studies on the impact of selfish behavior show that the performance are severely influenced if a major portion of the nodes is selfish in terms of delivery ratio, overhead and latency. A reputation based intermediate message forwarding control scheme was proposed in this paper. Simulation results show that an appropriate reputation threshold value improves the network performance.

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