Abstract
A fundamental problem in wireless sensor networks is to maximize network lifetime under given energy constraints. In this paper, we study the network lifetime problem by considering not only maximizing the time until the first node fails, but also maximizing the lifetimes for all the nodes in the network, which we define as the Lexicographic Max-Min (LMM) node lifetime problem. The main contributions of this paper are two-fold. First, we develop a polynomial-time algorithm to derive the LMM-optimal node lifetime vector, which effec..............etc

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Fast Detection of Mobile Replica Node Attacks in Wireless Sensor Networks
Using Sequential Hypothesis Testing



INTRODUCTION

ADVANCES in robotics have made it possible to develop a
variety of new architectures for autonomous wireless
networks of sensors. Mobile nodes, essentially small robots
with sensing, wireless communications, and movement
capabilities, are useful for tasks such as static sensor
deployment, adaptive sampling,..............etc

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Abstract
This work provides a solution to identify malicious nodesin wireless sensor networks through detection of maliciousmessage transmissions in a network. A message transmissionis considered suspicious if its signal strength is incompatiblewith its originator’s geographical position. We provideprotocols for detecting suspicious transmissions – andthe consequent identification of malicious nodes – and fordisseminating this information in the network. We evaluatethe detection rate and the efficiency of our solution along anumb..............etc

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matlab source code for deploying nodes and made clusters using k nearest neighbour..............etc

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As sensor networks edge closer towards wide-spread deployment



security issues become a central concern. Sensor networks have been identified as being useful in a variety of domains to include the battlefield and perimeter defense. So far, much research has focused on making sensor networks feasible and useful, and has not concentrated on security.
We present a suite of security building blocks optimized for resource constrained environments and wireless communication. SPINS has tw..............etc

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Hi i am Deepa i would like to get a sample matlab code for deploying nodes in wireless sensor network...............etc

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Routing Protocol Enhancement for handling
Node Mobility in Wireless Sensor Networks
G. Santhosh Kumar
1
, Vinu Paul M V
2
, G. Athithan
3
and K Poulose Jacob
4
1,4
Department of Computer Science, Cochin University of Science and Technology, Cochin -682 022,
Kerala, INDIA. Email: {san, kpj}@cusat.ac.in
2,3
Centre for AI and Robotics, DRDO, Bangalore-560 093, INDIA
Email: {vinumanayil, athithan.g}@gmail.com
Authorized licensed use limited to: COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY. Downloaded on February 7, 2009 at 06:..............etc

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Impact of Node Mobility on Routing Protocols for Wireless Sensor Networks
G. Santhosh Kumar, M.V. Vinu Paul and K. Poulose Jacob
Abstract”
1
Wireless sensor networks monitor their
surrounding environment for the occurrence of some
anticipated phenomenon. Most of the research related to
sensor networks considers the static deployment of sensor
nodes. Mobility of sensor node can be considered as an
extra dimension of complexity, which poses interesting
and challenging problems. Node mobility is a very
important aspect in the des..............etc

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Abstract.
Heterogeneous wireless sensor network (heterogeneous WSN) consists of sensor nodes with different ability, such as different computing power and sensing range. Compared with homogeneous WSN, deployment and topology control are more complex in heterogeneous WSN. In this paper, a deployment and topology control method is presented for heterogeneous sensor nodes with different communication and sensing range. It is based on the irregular sensor model used to approximate the behavior of sensor nodes. Besides, a cost model is proposed t..............etc

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pls give me service differnciation code like differnciating betwwen best effort or real time traffic..............etc

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