... andpower allocation for energy efficient cooperation in wireless sensor networks, ” in Proceedings of the IEEE International Con-ference on Communications, pp. 4255–4260, Beijing, China,June 2008.[9] ... selectivesingle-relay in wireless sensor networks, ” IEEE Transactions on Wireless Communications, vol. 7, no. 8, Article ID 4600219, pp.3066–3078, 2008.[32] J H. Chang and L. Tassiulas, Routing for maximum ... data processingand the system maintenance. The maintenance energyrepresents the “offline” energy cost that is required in orderto maintain the transmitter’s infrastructure (i.e., coolingoperations,...