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The LWT-MAC protocol extends the normal operation of B-MAC by taking advantage of the local synchronization that can be achieved after each packet transmission. Sensor nodes wake up at the end of each successful transmission to send or receive messages eliminating the need for the long preamble transmission. Current LPL analytical models are extremely simple as they do not consider the energy waste due to collisions. In this paper, a detailed analytical model of the LWT-MAC protocol, which considers the energy waste of collisions and overhearing for both saturated and unsaturated conditions, is presented.
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