An energy-efficient data dissemination using cross topology in wireless sensor network

Sink mobility brings new challenges to sensor networking. It suggests that information about mobile sink position be continuously propagated through the sensor field to keep all sensor nodes updated for the future data reports. Unfortunately frequent location updates from sink can lead to both excessive drain of sensors' limited battery power supply and increased collisions in wireless transmissions. In this paper, we describe a data forwarding scheme based on simple cross topology for wireless sensor network with mobile sinks. The mobile sink constructs a virtual cross topology periodically around itself to propagate its position to all nodes. A data source also configures a virtual cross topology to seek the mobile sink and report data to the sink. Our simulation results showed that our scheme offers satisfactory performance in terms of energy efficiency and packet delay time in wireless sensor network with mobile sinks.