A Ring-based Bidirectional Routing Protocol for Wireless Sensor Network with Mobile Sinks

Recently, research on wireless sensor networks with mobile sinks (mWSN) has attracted a lot of attention. The mobility of such sinks often results in unpredictable changes of network topology, and brings big challenge to the design of efficient routing protocols for such networks. In this paper, we focus on design of an energy efficient distributed routing protocol for mWSNs. For this purpose, we propose a lightweight ring-based bidirectional routing protocol, referred to as BI-LRRP. BI-LRRP does not need location information and it performs ring-based routing on multi-ring based network structure for packet delivery. To reduce the transmission cost and also prolong the network lifetime, BI-LRRP uses bidirectional search for finding a mobile sink before actual packet delivery. Simulations results show that the proposed protocol can achieve high performance as compared with existing work.