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Due to the limited energy supplies of nodes, in many applications like wireless sensor networks energy-efficiency is crucial for extending the lifetime of these networks. The authors study the routing problem for multihop wireless ad hoc networks based on cooperative transmission. The source node wants to transmit messages to a single destination. Other nodes in the network may operate as relay nodes. In this paper, they propose a cooperative multihop routing for the purpose of power savings, constrained on a required Bit Error Rate (BER) at the destination. They derive analytical results for line and grid network topologies.
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