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Unlike traditional wireless routing protocols which use a single fixed path, opportunistic routing explicitly takes advantage of the broadcast nature of wireless communications by using a set of forwarders to opportunistically perform packet forwarding. A key issue in the design of opportunistic routing protocols is the forwarder list selection problem. This paper establishes a general theory for analyzing the forwarder list selection problem, and develops an optimal solution, the Minimum Transmission Selection (MTS) algorithm, which minimizes the expected number of transmissions.
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