The cross-network energy efficient tradeoff: From wavelength division multiplexing wired networks to 5G wireless networks

Abstract

Low-delay and high energy-efficiency (defined as the transmitted bits per unit energy consumption) are highly expected in next general wireless networks. The existing green technologies of Internet Protocol (IP) have been studied in the wired and wireless networks, respectively. However, the joint optimization of the cross-networks energy-efficiency from the wired wavelength division multiplexing (WDM) networks to the next generation wireless networks remains unexplored. In this paper, we formulate a joint optimization to integrate the energy efficiency across networks. Specifically, each base station (BS) first collects the uplink user data. We then propose a novel joint cross-networks scheduling and routing algorithm according to the wireless channel quality of users, user rate, and the topology constraint. The IP packets are then delivered to the targeted users within the limit of delay. Based on the tradeoff between delay and energy efficiency, we achieve energy efficient and performance guaranteed cross-networks. The effectiveness of the proposed framework is verified by extensive simulations.