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Improved mobile device battery lifetime and latency mini-mization arecritical requirements for enhancing the mobile broadband services and userexperience. Long-term evolution (LTE) networks have adopted discontinuousreception (DRX) as the baseline solution for prolonged battery lifetime.However, in every DRX cycle, the mobile device baseband processing unitmonitors and decodes the control signaling, and thus all instances without anyactual data allocation leads to unnecessary energy consumption. This facttogether with the long start-up and power-down times can prevent adoptingfrequent wake-up instants, which in turn leads to considerable latency. In thiswork,a novel wake-up scheme is described and studied, to tackle the trade-offbetween latency and battery lifetime in future 5G networks, seeking thus tofacilitate an always-available experience, rather than always-on. Analyticaland simulation-based results show that the proposed scheme is a promisingapproach to control the user plane latency and energy consumption, when thedevice is operating in the power saving mode. The aim of this article is todescribe the overall wake-up system operating principle and the associatedsignaling methods,receiver processing solutions and essential implementationaspects. Additionally, the advantages compared to DRX-based systems are shownand demonstrated, through the analysis of the system energy-efficiency andlatency characteristics, with special emphasis on future 5G-grade mobiledevices

Novel Wake-up Scheme for Energy-Efficient Low-Latency Mobile Devices in 5G Networks