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T. He, S. Krishnamurthy, L. Luo, Ting Yan, Lin Gu, R. Stoleru, Gang Zhou, Qing Cao, P. Vicaire, J. Stankovic, T. Abdelzaher, J. Hui, B. Krogh (2006)
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T. He, S. Krishnamurthy, J. Stankovic, T. Abdelzaher, L. Luo, R. Stoleru, Ting Yan, Lin Gu, J. Hui, B. Krogh (2004)
Energy-efficient surveillance system using wireless sensor networks
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Sentry-Based Power Management in Wireless Sensor Networks
A. Mainwaring, D. Culler, J. Polastre, R. Szewczyk, John Anderson (2002)
Wireless sensor networks for habitat monitoring
Power management is an important technique to prolong the lifespan of sensor networks. Many power management protocols employ wake-up/sleep schedules, which are often complicated and inefficient. We present power management schemes that eliminate such wake-up periods unless the node indeed needs to wake up. This type of wake-up capability is enabled by a new radio-triggered hardware component inspired by the observation that the wake-up radio signal contains enough energy to trigger a wake-up process. We evaluate the potential power saving in terms of the lifespan of a sensor network application, using experimental data and SPICE circuit simulations. Comparing the result with always-on and rotation-based power management schemes, we find the radio-triggered scheme saves 98% of the energy used in the always-on scheme, and saves over 70% of the energy used in the rotation-based scheme. Consequently, the lifespan increases from 3.3 days (always-on) or 49.5 days (rotation-based) to 178 days (radio-triggered). Furthermore, a store-energy technique can extend operating distance from 10 feet to 22 feet, or even longer if longer latency is acceptable. Wake-up efficiency is evaluated in NS-2 simulations, which show that radio-triggered wake-up has fewer failures, shorter latency, and consistently larger sensing laxity than rotation based wake-up. We also present amplification and radio-triggered IDs which can further enhance performance.
Real-Time Systems – Springer Journals
Published: Jan 1, 2005
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