Abstract
It is very challenging to design an efficient network-wide broadcast protocol for asynchronous wireless sensor networks (AWSNs). Since the neighbors adopt sleep schedule independently and the probability that they wake up concurrently is very low, each single-hop broadcast has to be substituted by multiple unicast transmissions. Moreover, without the schedule knowledge of designated neighbors, a sender has to keep active until all these nodes are covered, which consumes a large amount of energy. In this letter, we propose an energy-efficient network-wide broadcast protocol (EENWB) for AWSNs. By introducing more aggressive cooperations among the neighboring senders, some senders can go to sleep much earlier, only at the cost of increasing the active periods of their cooperators slightly. Extensive simulation results show that EENWB can reduce the total energy consumption greatly.
Published Version
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