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The last few years have seen an increased interest in the potential use of wireless sensor networks (WSNs) in various fields like disaster management, battle field surveillance, and border security surveillance as described by Quaritsch (2010), Hart (2006), Bokareva (2006) and Dudek (2009). In such applications, a large number of sensor nodes are deployed,(More)
— Clustering in wireless sensor networks (WSNs) is an important technique to ease topology management and routing. Clustering provides an effective method for prolonging lifetime of a WSN. This paper proposes energy efficient multi-level clustering schemes for wireless sensor networks. Wireless sensor nodes are extremely energy constrained with a limited(More)
In CMOS circuits, the reduction of the threshold voltage due to voltage scaling leads to increase in sub threshold leakage current and hence, static power dissipation. In the nanometer technology regime, power dissipation and Process parameter variations have emerged as major design considerations. These problems continue to grow with leakage power becoming(More)
In last few years, there has been a growing interest in the area of Wireless Sensor Networks (WSNs). Now a day's WSNs are being deployed in large sensing areas for real life applications [1]. As sensor networks has limited and non-rechargeable energy resources, prolonging the lifetime of WSNs is a great issue. Some sensor nodes of comparatively high energy(More)
One of the fundamental problems in wireless sensor networks (WSNs) is localization that forms the basis for many location aware applications. Localization in WSNs is to determine the physical position of sensor node based on the known positions of several nodes. In this paper, a range free, enhanced weighted centroid localization method using edge weights(More)
Wireless sensor networks (WSNs) do not always have sensor nodes of same type. In other words, WSNs are not always homogeneous, but some sensor nodes of higher energy can be used to prolong the lifetime and reliability of WSNs. Heterogeneous wireless sensor networks (HWSNs) have some sensor nodes of relatively higher energy. HWSNs are very useful in real(More)
The use of Very Large Scale Integration (VLSI) technologies in high performance computing, wireless communication and consumer electronics has been growing at a very fast rate. Every generation of VLSI technology reduces feature size of transistor and leads to more powerful and compact wireless devices. The challenge of the advanced VLSI technology is the(More)