关键词: 移动Sink, 数据查询, LAT协议, 回路避免

Abstract:

Wireless sensor networks are usually used to collect data from largescale networks. In order to reduce the energy consumption, mobile Sink is often used to collect the sensing data. In this paper, we propose a loop avoidance tracking (LAT) protocol for data query in WSNs with mobile Sinks. In this protocol, the Sink node can avoid the node in the loops by comparing the changes of angles but reserve the nodes which are not on a loop, and thus the data will be transferred to the Sink on a shorter routing path. The simulation results demonstrate that the proposed protocol improves the query efficient and offers satisfactory performance in prolonging the network lifetime.

Key words: mobile Sink, data query, LAT protocol, loop avoidance