Multiple Dynamic Sink Model for Supporting Mobile Users in Wireless Sensor Networks

Wireless sensor network consists of sensor nodes with sensing and communication capabilities. Typical communication model of wireless sensor network consists of several sensor nodes as Group members, Group leaders and sinks. The Sink mobility brings new challenges to large-scale sensor, networks. The dynamic sink model does not rely on the traditional communication model of wireless sensor networks. The dynamic sink model is to avoid long relay paths organized by footprint chaining of the mobile sink model, a mobile user chooses a sensor node as a dynamic sink when the mobile user needs some information. The dy- namic sink constructs a data gathering tree and collects data from all sources. The dynamic sink model also has the disconnection problem of remote users. Moreover, if the mobile user wants to gather data again, it reselects a new dynamic sink and reconstructs a new data gathering tree from the dynamic sink. The simulation results of the proposed model are compared with existing model in terms of energy consumption, packet delivery ratio, delay and avoid packet loss for future system design.