Date Added: Mar 2011
Energy saving and high delivery reliability are two essential metrics in wireless ad hoc networks. In this paper, the authors propose a joint Power Control and Network Coding (PCNC) scheme which regulates the transmission power to reduce the overall energy usage and uses network coding to improve reliability by reducing the number of packet retransmissions. To argue for PCNC scheme, they investigate both unicast and multicast routing scenarios. To evaluate routing optimality, they adopt expected utility as a metric, which integrates energy cost, reliability, and benefit value. Based on the expected utility, they explore the optimality in both unicast and multicast routing.