Multi-user and channel dependent scheduling based adaptive power saving for LTE and beyond system

In this paper, adaptive power saving methods considering multi-user diversity and channel dependent scheduling characteristics are proposed for Long-Term Evolution (LTE) and beyond system. In LTE, Discontinuous Reception (DRX) is applied in User Equipment (UE) to conserve mobile terminal's battery power. According to our observation, system load and channel variation have great impact to the power saving efficiency. We firstly investigate effects of these two factors on the effectiveness of DRX. Based on the analysis, we proposed novel and efficient adaptive DRX schemes. In these schemes, DRX parameters are adaptively changed according to number and velocity of connected UE respectively. Simulation results show that power saving efficiency can be greatly improved without much loss of system capacity.