Power-Aware Node Deployment in Wireless Sensor Networks

Abstract

Wireless sensor networks (WSNs) have attracted intense interest due to their extensible capability. In this paper, we attempt to answer a fundamental but practical question: “how should we deploy these nodes?” In most current designs, sensor nodes are randomly or uniformly distributed because of their simplicity. However, the node deployment has a great impact on the performance of WSNs. Instead of maintaining the coverage for some snapshots of a WSN, it is essential that we can provide a continuous coverage in the whole lifecycle of the WSN. We will exhibit the weakness of the uniform distribution by disclosing the fatal sink routing-hole problem. To address this problem, we propose a non-uniform, power-aware distribution scheme. Our analysis and simulation results show that the power-aware deployment scheme can significantly improve the long-term network connectivity and service quality.

Keywords:

• Wireless Sensor Networks
• Node Deployment
• Sensing and Connectivity Coverage

Acknowledgement

This research was supported in part by Hong Kong RGC Grant HKUST6183/05E, the Key Project of China NSFC Grant 60533110, and the National Basic Research Program of China (973 Program) under Grant No. 2006CB303000.