Extending Coverage and Lifetime of K-coverage Wireless Sensor Networks Using Improved Harmony Search

Sensors & Transducers

Hoda Jalal Kamali¹  Mohsen Ebrahimi Moghaddam²  Shohreh Ebrahimnezhad³ 

[1] G.C;Tehran, Iran;Electrical and Computer Engineering Department Shahid Beheshti University;

关键词: Wireless sensor networks;    Improved harmony search;    K-coverage;    Lifetime;    Mobile sensors;   

DOI  :  

来源: DOAJ

【 摘 要 】

K-coverage wireless sensor networks try to provide facilities such that each hotspot region is covered by at least k sensors. Because, the fundamental evaluation metrics of such networks are coverage and lifetime, proposing an approach that extends both of them simultaneously has a lot of interests. In this article, it is supposed that two kinds of nodes are available: static and mobile. The proposed method, at first, tries to balance energy among sensor nodes using Improved Harmony Search (IHS) algorithm in a k-coverage and connected wireless sensor network in order to achieve a sensor node deployment. Also, this method proposes a suitable place for a gateway node (Sink) that collects data from all sensors. Second, in order to prolong the network lifetime, some of the high energy-consuming mobile nodes are moved to the closest positions of low energy-consuming ones and vice versa after a while. This leads increasing the lifetime of network while connectivity and k-coverage are preserved. Through computer simulations, experimental results verified that the proposed IHS-based algorithm found better solution compared to some related methods.

【 授权许可】

Unknown