The mobile trajectory design of sink in WSN is the core research issue. This study models the data-gathering process in WSN as gravitation attraction between any two objects and proposes a moving strategy of sink in WSN based on Gravitational field. Sink tends to move to the direction where the sensor node with the highest gravitational field intensity. The strategy considers several factors affecting the network performance, including sensor node residual energy, the sink access time interval for sensor node and the distance between sensor node and sink. The simulation results show that this strategy can effectively balance node load, reduce the packet overflow rate, prolong network lifetime and improve network performance.
展开▼
