SSEEP: State-Switchable Energy-Conserving Routing Protocol for Heterogeneous Wireless Sensor Networks

An energy-conserving protocol of routing is critical to a wireless sensor network (WSN) because of limited energy supply and communication capabilities of wireless sensor nodes. LEACH protocol has been widely used, which is based on a homogeneous network without considering most heterogeneous sensor networks in practical application. In addition, instantly sending data perceived by sensor nodes to the cluster head is not suitable for specific applications such as anti-submarine underwater, in this kind of application environment, most of the sensing data is redundant. Therefore, this paper proposes an improved clustering protocol with data transmission status switchable, which can be used in heterogeneous sensor networks. Cluster heads filter the perceived information and start data transmission link, and then send data to the sink when the information intensity perceived exceeds the preset threshold. Otherwise, cluster heads record the received data and continue receiving data sent by the next round of cluster nodes. We fortunately found in the simulation results that the network lifetime is prolonged several times than the protocol of LEACH.