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Vol. 154, Issue 7, July 2013, pp. 32-41

 

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Lifetime-Oriented Optimal Relay Deployment for Three-tier Wireless Sensor Networks
 
1 Bin Zeng, Lu Yao and 2 Rui Wang

1 Department of Management, Naval University of Engineering, WuHan, HuBei, 430030, China

2 Library of Trainging Office, Naval University of Engineering, WuHan, HuBei, 430030, China

1 Tel.: 86-027-83443158, fax: 86-027-83443158

1 E-mail: zbtrueice@163.com

 

Received: 28 April 2013   /Accepted: 19 July 2013   /Published: 31 July 2013

Digital Sensors and Sensor Sysstems

 

Abstract: In this paper we address the network deployment problem, in which we aim to maximize the lifetime of a sensor network with minimum total energy consumption by computing the optimal locations of relay nodes with energy consumption rate (ECR) constraint and their assignment relationship with sensor nodes. Firstly a mixed integer programming model with fewer variables is proposed to formulate the relay deployment problem under the constraints of network flows and ECR. Then a shortest path based heuristic algorithm is developed to give the suboptimal solution of the model by constructing an energy efficient three-tiered hierarchical structure consisting of many power-limited sensor nodes, a small set of relays, and multiple BSs. Finally the effectiveness and performance of the proposed strategies are illustrated through simulations.

 

Keywords: Wireless sensor networks, Relay deployment, Energy efficiency, Heuristic algorithm, Three-tier structure.

 

 

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