Similarity of Image Multiple Feature Extraction and Retrieval Perspectives

Abstract: Wireless sensor networks have recently attracted significant attention for many military and civil applications, such as target tracking, surveillance and security management. Wireless sensors nodes have limited energy resources and are usually deployed in environments where recharging or replacement of the battery is either impossible or too costly. Therefore, energy resources for wireless sensor networks should be managed wisely to extend the lifetime of networks. There are several number of energy efficient protocols which have been used to prolong the network lifetime of the wireless sensor networks. These protocols can further be improved to achieve better results. In this paper, “an energy efficient three level hierarchical clustering protocol” for wireless sensor networks is proposed. The fundamental concept of this protocol is that there is a pre-defined radius around the Base Station (located at centre), some nodes are inside the radius and others are outside the radius. Cluster Heads which are outside the radius find the nearest Cluster Head which is inside the radius and send data to it. Then these inside Cluster Heads aggregate the data and send it to the Base Station. The proposed scheme is compared against LEACH protocol. Simulations have been conducted to evaluate these protocols and favorable results are obtained. Our results show that TLHCLP improves network lifetime by an order of magnitude compared with LEACH.

Keywords: Clustering, network lifetime, LEACH, routing protocols, wireless sensor networks.