A Data Delivery Scheme Based on Sink Centrality for Delay Tolerant Mobile Sensor Networks

Delay Tolerant Mobile Sensor Networks (DTMSN) own some unique characteristics which distinguishes itself from conventional sensor networks, such as sensor mobility, loose connectivity, and delay tolerability. Therefore, traditional data transmission methods can not be effectively applied to DTMSN. An efficient data delivery scheme based on sink centrality is proposed. Sink centrality can be estimated by exploring the direct and indirect social ties between sensor nodes and sink nodes. Then coupled with the energy level of sensor nodes, the utility value of sensor nodes can be predicted. Furthermore, effective data delivery decisions will be made according to the utility value. Simulation results show that the data delivery scheme proposed can significantly improve the network performance.