Know Your Neighborhood: A Strategy for Energy-efficient Communication

TitleKnow Your Neighborhood: A Strategy for Energy-efficient Communication
Publication TypeConference Articles
Year of Publication2010
AuthorsAshraf, F., R. Crepaldi, and R. Kravets
Conference NameThe 7th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (MASS)
Date Published11/2010
Conference LocationSan Francisco
Abstract Wireless sensor networks typically conserve energy by following a periodic wakeup-sleep schedule: nodes minimize idle time and spend most of their time in a low power sleep state. In order to communicate and exchange data in such a network, the current duty-cycling MAC protocols either require tight synchronization between the neighbor wakeup schedules or spend a significant amount of energy in signaling the sleeping nodes. In contrast, this paper presents Neighborhood-based Power Management (NPM), an energy efficient asynchronous MAC protocol that minimizes signaling overhead through oppor- tunistically gained knowledge about neighbor wakeup schedules. Unlike the synchronization-based MAC protocols, NPM does not require a priori knowledge of the wakeup schedules. Using only a minimal exchange of schedule information, NPM reduces the signaling overhead by shortening the wakeup signal. Further- more, NPM uses its wakeup signal to awaken all receivers in the neighborhood of the sender, enabling all sender-receiver pairs in that neighborhood to communicate. Our extensive evaluations show that NPM outperforms popular B-MAC [1], X-MAC [2] and SCP [3] protocols under all network conditions. NPM reduces the signaling overhead, with up to 74% savings in energy and 80% reduction in delay.
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