Wake-Up Signal Location for Paging Reception Power Management
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Solution Overview
Problem
Conventional paging techniques in user equipment (UE) result in inefficient power consumption as the UE monitors for paging during scheduled time windows regardless of whether a paging transmission is intended, leading to unnecessary active mode usage.
Innovation Solution
Implementing a wake-up signaling mechanism that allows the UE to determine whether to use an active or sleep mode during a paging occasion based on an indication received in a wake-up signal, thereby optimizing power usage by remaining in sleep mode when no paging transmission is scheduled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors for paging during the scheduled time window regardless of whether a paging transmission is performed, then the UE ensures reliable paging reception, but the UE experiences inefficient power consumption
Solution Approach 1:
The network transmits a wake-up signal before the paging occasion to indicate in advance whether a paging transmission will occur. The UE checks this preliminary signal and only activates its receiver for the full paging occasion if the wake-up signal indicates paging is scheduled, otherwise it remains in sleep mode.
Solution Approach 2:
A wake-up signal is introduced as an intermediary between the network's paging decision and the UE's paging reception action. This intermediate signal allows the UE to make an informed decision about whether to activate power-consuming reception circuits, resolving the contradiction between reliable reception and power efficiency.
2Reliability
If the UE enters active mode during the paging occasion, then the UE can receive paging transmissions, but the UE consumes unnecessary power when no paging is intended
Solution Approach 1:
The wake-up signal provides preliminary information about whether paging transmission is scheduled before the UE commits to entering active mode. This allows the UE to avoid unnecessary activation of power-consuming reception circuits when no paging is intended, eliminating energy waste while maintaining reliable reception when needed.
Solution Approach 2:
The UE's operational state becomes dynamic rather than static - it transitions between sleep mode and active mode based on the wake-up signal indication. This dynamic adaptation allows the system to optimize power consumption by matching the UE's active state with actual paging transmission needs.
Data Source
AI summary
A user equipment (UE) configured to monitor paging occasions of a network. The UE operates in a paging discontinuous reception (DRX) cycle, wherein the DRX cycle includes a paging occasion (PO). The UE determines a location in time for a wake-up signal (WUS) occasion associated with the PO and determines whether to utilize an active mode or a sleep mode during the PO based on an indication included in a WUS received during the WUS occasion.