No abstract

Sink mobility has been widely used to reduce the energy consumption of sensor nodes, which can prolong the lifetime of nodes in wireless sensor networks (WSNs)

In this paper we present an overview of energy efficient strategies in wireless sensor networks (WSNs) with mobile sink. Firstly, we investigate the existing issues in WSNs. Then we focus on the problem of energy efficient data gathering strategy with mobile sink and present some existing solutions. Finally, we conclude this paper with some potential extensions which need to be further explored. Through the existing works, we can see that sink mobility can enhance the network performance.

In recent years, the design and implementation of the wireless sensor networks is widely chosen for research as sensor networks enable application that connects the physical world to the virtual world. Wireless platforms are less expensive and are more powerful, with usage in enabling the promise health science to military sensing operations. The wireless sensor networks are prone to more attacks than wired networks. However, the hardware simplicity of these devices makes defense mechanisms designed for traditional networks infeasible. This paper studies the security aspects of wireless sensor networks. A survey with current threats and countermeasures is carried out, in particular, explored the protocol layer attack on sensor networks.