Wake-Up Signal Receiver for Low-Power DRX Paging
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power consumption, particularly in user equipment (UE) during discontinuous reception (DRX) states, as UEs often wake up unnecessarily to monitor paging messages, leading to increased power usage.
Innovation Solution
Implementing a low-power wake-up signal (WUS) system that allows UEs to monitor a wake-up signal in a radio resource control (RRC) non-connected mode, using a dedicated wake-up receiver (WUR) to determine whether to wake up the primary connection receiver (PCR) only when necessary, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs monitor paging messages during DRX states, then communication reliability is improved, but power consumption increases
Solution Approach 1:
A wake-up signal is introduced as an intermediary between the network and the UE. The wake-up signal receiver (WUR) monitors this low-power signal to determine whether the UE should wake up to monitor paging messages. This intermediary mechanism allows the UE to remain in low-power state when no paging is needed while still maintaining reliable communication when paging is present.
Solution Approach 2:
The reception function is segmented into two separate receivers: a wake-up signal receiver (WUR) for low-power monitoring of wake-up signals, and a primary connection receiver (PCR) for full-function paging message reception. This segmentation allows the UE to use only the low-power WUR during DRX states, activating the power-intensive PCR only when necessary based on wake-up signal detection.
2Reliability
If UEs wake up to monitor paging messages, then paging reception capability is improved, but unnecessary power consumption occurs
Solution Approach 1:
The wake-up signal is transmitted before the paging message to preliminarily indicate whether the UE should wake up. This preliminary action allows the UE to avoid unnecessary wake-ups and power consumption while ensuring that paging messages are received when needed. The wake-up signal acts as a precursor that prepares the UE for potential paging reception.
Solution Approach 2:
The UE uses a dedicated wake-up signal receiver (WUR) that operates independently from the primary connection receiver (PCR). The WUR autonomously monitors wake-up signals and determines whether the PCR should be activated, allowing the UE to self-manage its power consumption without continuous network control signaling.
3Use of energy by moving object
If a dedicated wake-up receiver (WUR) is used, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The wake-up signal reception function is extracted from the primary connection receiver (PCR) and implemented as a separate, dedicated wake-up signal receiver (WUR). This extraction allows the WUR to be optimized for low-power operation with simplified functionality, while the PCR maintains its full capabilities for paging message reception. The separation enables each receiver to be independently optimized for its specific function.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data. transmission rate. Disclosed is a low-power wake-up signal, a method, and a device using the same, in which the method that is performed by a user equipment (UE) includes monitoring the wake-up signal in a radio resource control (RRC) non-connected mode, with the wake-up signal including a single wake-up signal or a wake-up signal set consisting of multiple wake-up signals; and, based on a result of the monitoring of wake-up signal, deciding whether to monitor a corresponding paging occasion.