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The authors study the problem of cooperative transmission, relay selection and scheduling in battery-operated wireless networks, where energy efficiency is a critical design consideration. They assume that multiple relay nodes in the network can cooperate their transmissions of information to gain energy savings in a distributed network MIMO system. They formulate the problem as maximizing the lifetime of the network in terms of maximizing the overall number of packets transmitted by the source to the destination, given a limited energy supply at the source node and each relay node along the transmission path.
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