Adaptive DRX Scheme to Improve Energy Efficiency in LTE Networks With Bounded Delay

Abstract

Abstract-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.

Extended hybrid directional DRX with auxiliary active cycles for light traffic in 5G networks

“…The advent of smartphones has facilitated the availability of multimedia services, video streaming, interactive gaming, VoIP, etc. These energy hungry applications need high speed and complex signal processing, which in turn diminishes the battery power of the smartphones . Massive MIMO, advanced coding, high‐order modulation, and beam forming techniques used in the 5G communication demand even higher energy at the user equipment (UE) …”

“…Discontinuous reception (DRX) has been used as an efficient power saving protocol at the UE in various standards like Universal Mobile Telecommunications System (UMTS), Long‐Term Evolution (LTE), and Long‐Term Evolution Advanced (LTE‐A) wireless networks . In DRX mechanism, the incoming packets are received in a discontinuous manner at the UE instead of the packets being continuously sensed and received in earlier wireless standards.…”

“…This discontinuous mode of packet reception hence saves the power of the UE by switching off its circuitry when there is no packet availability and monitors the incoming packets only at certain intervals of time. DRX allows the UE to wake up only for a short span of time called ON duration (t ON ) to monitor the control signals on the Physical Downlink Control Channel (PDCCH) . The PDCCH carries a message called downlink control information, which contains details about resource allocations for the UE.…”

“…These energy hungry applications need high speed and complex signal processing, which in turn diminishes the battery power of the smartphones. 4 Massive MIMO, advanced coding, high-order modulation, and beam forming techniques used in the 5G communication demand even higher energy at the user equipment (UE). 5 Discontinuous reception (DRX) has been used as an efficient power saving protocol at the UE in various standards like Universal Mobile Telecommunications System (UMTS), Long-Term Evolution (LTE), and Long-Term Evolution Advanced (LTE-A) wireless networks.…”

“…5 Discontinuous reception (DRX) has been used as an efficient power saving protocol at the UE in various standards like Universal Mobile Telecommunications System (UMTS), Long-Term Evolution (LTE), and Long-Term Evolution Advanced (LTE-A) wireless networks. 4,[6][7][8][9][10][11][12][13][14][15][16] In DRX mechanism, the incoming packets are received in a discontinuous manner at the UE instead of the packets being continuously sensed and received in earlier wireless standards. This discontinuous mode of packet reception hence saves the power of the UE by switching off its circuitry when there is no packet availability and monitors the incoming packets only at certain intervals of time.…”