A Lifetime Enhancing Node Deployment Strategy in WSN
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- 作者：Halder Subir ; Ghosal Amrita ; Sur Sanjib ; Dan Avishek ; DasBit Sipra
- 关键词：node deployment ; network lifetime ; coverage ; connectivity
- 刊名：Lecture Notes in Computer Science
- 出版年：2009
- 出版时间：2009
- 年：2009
- 卷：5899
- 期：1
- 页码：295-307
- 全文大小：264.0 KB
文摘
Wireless sensor networks (WSNs) consist of a large number of small, battery-powered wireless sensor nodes and thereby constrained with energy resource. The network as a whole must minimize the energy usage in order to enable untethered and unattended operation for an extended period of time. One fundamental way of reducing such energy usage and enhancing lifetime is judicial placement of sensor nodes within the network area. The present work proposes a lifetime-enhancing node-deployment strategy. Primarily more nodes are deployed towards the sink exploiting the fact that more energy is drained out from the nodes close to the sink. Further, locations which are approximately equi-distant from the sink are assigned different classes of priorities according to their responsibility of forwarding data of nodes located in the neighbouring cells. The principle of this strategy is justified by Lemma and corresponding proof. Exhaustive simulation is conducted to observe the impact of node distribution on network lifetime. The result is compared with one of the existing deployment strategies, which shows our scheme outperforms the existing one in terms of network lifetime.