Consensus- based decentralization of interior point methods for heterogeneous networks energy saving

In this paper, we propose a new decentralized consensus-based energy saving technique that improves the energy efficiency of a cellular network, with a focus on femto base station networks. The energy saving is obtained by a log barrier optimization on the sum transmit power of the network with a long-term or short-term coverage constraint for each cell. The common coordination parameter of the log-barrier method is approximated at each node by the result of a consensus algorithm, which allows for tracking the topology variations in a fully decentralized fashion. Simulation shows that the proposed technique doubles the energy saving efficiency of the centralized energy saving.