  The Discontinuous Reception (DRX) mechanism is commonly employed in current
LTE networks to improve energy efficiency of user equipment (UE). DRX allows
UEs to monitor the physical downlink control channel (PDCCH) discontinuously
when there is no downlink traffic for them, thus reducing their energy
consumption. However, DRX power savings are achieved at the expense of some
increase in packet delay since downlink traffic transmission must be deferred
until the UEs resume listening to the PDCCH. In this paper, we present a
promising mechanism that reduces energy consumption of UEs using DRX while
simultaneously maintaining average packet delay around a desired target.
Furthermore, our proposal is able to achieve significant power savings without
either increasing signaling overhead or requiring any changes to deployed
wireless protocols.
