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The authors proposed Green-Wave Sleep-Scheduling (GWSS) - inspired by synchronized traffic lights - for scheduling sleep-wake slots and routing data on duty-cycling wireless ad hoc networks. They showed that, on a variety of structured topologies such as the line, grid and the tree, the GWSS protocol greatly reduces energy consumption of the network by putting nodes to sleep and routing data in a coordinated manner without hurting latency; and that GWSS is latency optimal on these network topologies at low traffic loads, using a general latency lower bound they derived for duty-cycling networks.
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