Energy-Efficient Mechanism for Mobility Guarantee used Location-Information in Wireless Sensor Networks

Many researches in wireless sensor networks have been exploited a geographic routing to effectively disseminate data between sinks and sources. However, the geographic routing needs that the sinks and the sources are aware of location information of each other. To know the location information, there have been proposed two manners. The first manner is a sink-initiated location information flooding that the sink floods its location information. The second manner is a source-initiated location information flooding that the source floods its location information. However, these two manners have two problems. Firstly, whenever the sink and the source move, they flood their location information. Secondly, in few sinks and few sources, their location information is disseminated unnecessary nodes besides nodes which send and receive data in actually. Therefore, this paper proposes a protocol that can solve the two problems and disseminate effectively data between few sinks and few sources. The proposed protocol exploits a location information manager that manages real-time location information of the sinks and the sources. We also compare the performance of the proposed protocol with the existing protocols through a simulation, and show the superiority of the proposed protocol in terms of network lifetime, data delivery ratio, and delay latency.