Energy-efficient research of a transmission mode based on user cooperation

Green network attracts a lot of attention due to global climate change. User cooperation is considered as one of the most promising technologies for energy saving in the cellular networks. Compared with the traditional cellular systems in which the quality of service (QoS) is the only system performance metric, the green cellular systems should consider both system energy consumption and QoS. In this paper, the area energy efficiency which is measured in bit per Joule per square kilometer of the wireless cellular network with user cooperation is analyzed. The mode of user terminal take a two-hop way to access the base station via idle terminal is introduced. Area energy efficiency is showed by simulation results compared with the direct transmission. And user cooperation matching algorithm in one cell was proposed. The results show that the proposed transmission mode can significantly reduce energy consumption and improve the energy efficiency without degrading the QoS.