Pages: 24-42

Abstract

The new generation of mobile communication sys¬tems is being developed for high-bandwidth mobile networks to accommodate the increasing demand for high data rate services like voice over IP, video streaming, and games. Due to high data rates, these applications drain the user equipment (UE) battery quickly. Long-Term Evolution (LTE)/LTE-advanced (A) has adopted a Discontinuous Reception (DRX) mechanism to improve the energy efficiency of a user equipment. DRX allows UEs to monitor the physical downlink control channel (PDCCH) discontinuousness, when there is no downlink traffic for them, thus reducing their energy consumption. DRX results in higher latency due to its sleep cycle. In this paper, a new scheme was presented that could improve energy efficiency in UE, while maintaining average packet delay around a delay threshold. Numerical analysis and system simulation showed that this scheme was able to achieve significant power saving.