Traffic-Based Adjustable Discontinuous Reception Mechanism with Bounded Delay

Abstract

Long-Term Evolution (LTE) standard has been introduced to support high speed and reliable communication in mobile devices and wireless data terminals. High data rates are the main cause of the quick battery discharge in User Equipment (UE)s in 4G/LTE and beyond. To save the UEs battery power, LTE networks utilize the Discontinuous Reception (DRX) mechanism to enhance the energy efficiency of UEs. In the DRX mechanism, there is a tradeoff between the communication delay and power consumption of the device where DRX energy efficiency improves at the expense of higher latency and vice versa. This paper proposes a novel DRX technique for 4G and beyond, in which DRX long and short sleep cycles are adjusted adaptively based on the traffic condition and a threshold delay. Numerical analysis and system simulations show that this scheme is able to increase energy efficiency at UEs and maintains the wake-up delay around a threshold delay.