Abstract
Improved mobile device battery lifetime and latency minimization are critical requirements for enhancing the mobile broadband services and user experience. Long-term evolution (LTE) networks have adopted discontinuous reception (DRX) as the baseline solution for prolonged battery lifetime. However, in every DRX cycle, the mobile device baseband processing unit monitors and decodes the control signaling, and thus, all instances without any actual data allocation leads to unnecessary energy consumption. This fact together with the long start-up and power-down times can prevent adopting frequent wake-up instants, which, in turn, leads to considerable latency. In this work, a novel wake-up scheme is described and studied, to tackle the trade-off between latency and battery lifetime in future 5G networks, seeking thus to facilitate an always-available experience, rather than always-on. Analytical and simulation-based results show that the proposed scheme is a promising approach to control the user plane latency and energy consumption, when the device is operating in the power saving mode. The aim of this article is to describe the overall wake-up system operating principle and the associated signaling methods, receiver processing solutions and essential implementation aspects. Additionally, the advantages compared to DRX-based systems are shown and demonstrated, through the analysis of the system energy-efficiency and latency characteristics, with special emphasis on future 5G-grade mobile devices.
Highlights
I N future 5G networks, it is expected that a diverse set of services, e.g., augmented and virtual reality, cloud gaming, ultra-high-definition video streaming and connected cars, with very aggressive quality-of-service (QoS) requirements will become ubiquitous [2]
In this article, motivated by above, we propose a novel wake-up scheme as an efficient method to tackle the tradeoff between latency and battery lifetime by reducing the power overhead of the DRX procedure, caused by unscheduled DRX cycles, while still maintaining low latency
For the completeness of the study, before going into the numerical performance evaluations, we provide selected implementation insight regarding how the proposed WRx processing can be efficiently incorporated into the overall new modem (NM) hardware
Summary
I N future 5G networks, it is expected that a diverse set of services, e.g., augmented and virtual reality, cloud gaming, ultra-high-definition video streaming and connected cars, with very aggressive quality-of-service (QoS) requirements will become ubiquitous [2]. The slow technological progress in battery capacities complicates adopting more and more complex and high-rate continuous processing in the devices, and different energy saving features and mechanisms are of substantial importance [4]. To this end, multiple experimental investigations show that the most energy consuming components of smartphones can be attributed to the cellular connectivity subsystem and the display [5], [6], [7]. Due to the asymmetric data traffic which is dominated by downlink [8], our main focus is on the device receive mode
Sign-in/Register to view highlights & summary 
Submitted Version (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call