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This paper proposes Efficient Sleep Scheduling based on Application Timing (ESSAT), a novel power management scheme that aggressively exploits the timing semantics of wireless sensor network applications. The authors present three ESSAT protocols each of which integrates a light-weight traffic shaper that actively shapes the workload inside the network to achieve predictable timing proper-ties over multiple hops, and a local scheduling algorithm that wakes up nodes just-in-time based on the timing properties of shaped workloads.
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