Yunnan Wu, Philip A. Chou, and Sun-Yuan Kung
The minimum energy required to transmit a
bit of information through a network characterizes the most
economical way to communicate in a network. In this paper,
we show that under a simplified layered model of wireless
networks, the minimum-energy multicast problem in mobile
ad hoc networks is solvahle as a linear program, assuming
network coding. Compared with conventional routing snlutinns,
network coding not only promises a potentially lower
energy-per-hit, but also enables finding the optimal solution
in polynomial time, in sharp contrast with the NP-hardness
of constructing the minimum-energy multicast tree as the
optimal routing solution.
Publisher Institute of Electrical and Electronics Engineers, Inc.
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