ICTACT Journal on Communication Technology

Regis W. Anne ¹, Elijah Blessing Rajsingh ²

Affiliations
1 Department of Computer Applications, Sri Krishna College of Engineering and Technology, IN
2 School of Computer Science and Technology, Karunya University, IN

Abstract

Wireless Sensor Network (WSN) is a collection of intelligent sensors that communicate and coordinate in an energy constrained environment. Due to the limited energy supply of the sensors, lifetime problems arise in static WSN. One of the potential solutions to this problem is a mobility-assisted WSN. Mobility can be introduced by adding extra entities like mobile sinks, mobile cluster-head or mobile relays (MRs) to the existing static WSN. The entities can significantly improve the functionality and performance of the WSN by making it flexible to failures, ease data collection, increase energy efficiency, enhance connectivity, improve coverage and prolong network lifetime. The need of today's applications demands mobility-assisted WSN instead of the traditional static WSN. In this paper, we control the movement of MRs to maximize network lifetime. A distributed algorithm for controlling the movement of MRs is given and its performance is validated for the network parameters such as network lifetime and average residual energy. The proposed method shows that lifetime can be improved compared to that of a static network.

Keywords

Mobile Relays, Network Lifetime, Mobility, Simulations.

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Regis W. Anne ¹, Elijah Blessing Rajsingh ²

Affiliations
1 Department of Computer Applications, Sri Krishna College of Engineering and Technology, IN
2 Department of Computer Science and Engineering, Karunya University, IN

Abstract

Wireless Sensor Network (WSN) is a collection of intelligent sensors that can communicate to form a self-organizing network and can function without human intervention for a long amount of time. Traditionally, WSN was static, but due to the necessity of today’s applications, there has been a paradigm shift from a static WSN to dynamic WSN. This dynamism can be realized by adding mobility to static WSN. Mobility can be added by introducing extra elements called Mobile Entities (MEs) like Mobile Sinks (MSs), Mobile Cluster Heads (MCHs), Mobile Relays (MRs) and Mobile Sensor Nodes (MSNs). Adding MEs to WSN has attracted much research interests because it can significantly improve the capability and functionality of the WSN by making it flexible to failures, ease data collection, increase energy efficiency, enhance connectivity, improve coverage and prolong network lifetime, so the full potential of MEs can be harnessed to yield maximum benefits in static WSN. The goal of this paper is to present a comparative study and performance analysis of few of the possible MEs in literature and based on the results and analysis the best ME can be chosen for the desired application.

Keywords

Mobile Sink, Mobile Cluster Head, Mobile Relays, Network Lifetime, Theory, Metrics, Algorithms, Analysis, Simulations.

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