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Nonuniform Deployment Prolongs Lifetime of Wireless Sensor Networks
Demin Wang, Yi Cheng, Yun Wang and Dharma P. Agrawal

A wireless sensor network (WSN) is composed of wireless sensors with limited energy resources, which limits the network lifetime. How to maximize the network lifetime, is critical in the design of WSNs. We establish a relationship between the node deployment and the network lifetime in a periodical data delivery scenario of WSNs. On the basis of our theoretical analysis, we propose a new nonuniform deployment approach in which sensor nodes are spread on the WSN according to variation in the node energy consumption, thereby effectively increasing the network lifetime. Both theoretical analysis and simulation results show that our approach outperforms existing uniform deployment method in terms of the network lifetime. In addition, we also tested our deployment strategy on a WSN testbed.

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