Integration of Push-Based and Pull-Based Connectivity Status Sharing for Efficient Data Forwarding towards Mobile Sinks in Wireless Sensor Networks

In this paper, we propose a data forwarding method for efficient data gathering in wireless sensor networks with multiple mobile sinks which freely move in the target region. In our proposed method, each sensor node forwards data packets based on information on connectivity (the status of connection with mobile sinks). As the way to share information on connectivity among neighboring nodes, we integrate push-based and pull-based mechanisms we have proposed in [5]. The integrated mechanism utilizes advertisement from the nodes with good connectivity together with request from the nodes which hold data to transmit. By the complementary use of these mechanisms, our proposed method reduces the traffic for sharing information while realizing an efficient data forwarding.