Kablosuz Algılayıcı Ağlarda Ağ Ömrünü Uzatmak İçin Uygulamaya Özel Uyu-Uyan Stratejisi

Kablosuz Algılayıcı Ağlar (KAA) dağıtık veri toplamaya olanak sağlayan bir teknolojidir. Ne var ki bu ağların bazı kısıtları vardır. En önemli kısıt enerji kısıtıdır. Küçük bir bataryaya bağlı olarak çalışan sensör düğümlerin ömürleri bataryalarının ömürlerine bağlıdır. Düğümlerin yaşam sürelerinin arttırılmasına ilişkin birçok çalışma olmasına rağmen henüz tam olarak bir gelişme sağlanamamıştır. Enerji etkinliğini sağlamak için en temel yol düğümleri veya düğüm kümelerini uyutup uyandırmaktır. Bu çalışmada, KAA’da uygulamaya özel olarak düğümleri uyutup uyandıran bir yöntem geliştirdik. Geleneksel stratejilerde, bir küme içerisindeki düğümler algıladıkları verileri Küme Başına (KB) iletirler. Eğer KB, algılanan veriler içerisinde tekrarlar tespit ederse, tekrarlanan verileri siler ve kalan verileri baz istasyonuna göndedir. Bu da enerji kaybına neden olur. Bizim yöntemimiz, belirli bir periyotta eğer düğümlerin algıladıkları veriler aynı ise bazı düğümleri uyku konumuna geçirir. Böylece, ağın ömrü uzatılmış olur.

Anahtar Kelimeler:

Kablosuz algılayıcı ağlar, yönlendirme, uyut-uyandır, enerji etkinliği

Application Specific Sleep-Awake Strategy for Increasing Network Lifetime in Wireless Sensor Networks

Wireless Sensor Networks (WSN) is a technology that provides distributed data collection. However, these networks have some limitations. The most important constraint is energy limitations. The lifespan of sensor nodes that run on small battery depends on the battery life. Although there are many studies in the field of energy efficiency to extend the life of nodes, enough improvement has not been obtained yet. The most basic way to achieve energy efficiency is to sleep and awake the nodes or clusters of nodes. In this study, we proposed an application specific method to wake up and sleep nodes in WSNs. In traditional strategy, the nodes in the cluster sense data and send it to the Cluster Head (CH), if CHs detect redundancy of some data; they remove the duplication and send it to the base station. This is causing energy loss. Our method puts some nodes to sleep state if there are similar data in a certain period. By this way, the life of the network is extended.

Keywords:

Wireless sensor networks, routing, sleep-awake, energy efficiency,

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