Dynamic Receiver Switching for Paging Early Indication Energy Savings
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Solution Overview
Problem
Existing techniques face challenges in efficiently using receivers for paging-early-indication (PEI) reception, particularly in balancing the use of low power wake-up receivers (WUR) and main receivers to minimize energy consumption.
Innovation Solution
A method is described where a user equipment (UE) determines to use a WUR as the primary receiver for monitoring PEI during Discontinuous Reception (DRX), and upon detecting PEI, activates the main receiver for monitoring a paging occasion. The UE adjusts thresholds based on PEI information and switches between WUR and main receiver based on conditions such as channel quality and false alarm rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the WUR is used as the primary receiver for monitoring PEI, then energy consumption is reduced, but the reliability of PEI detection may deteriorate due to lower reception quality
Solution Approach 1:
The patent implements dynamic switching between WUR and main receiver based on real-time channel conditions. The UE monitors channel quality indicators (such as RSRP, RSRQ, or SINR) and adapts its receiver selection accordingly, using WUR when conditions are favorable and switching to the main receiver when conditions deteriorate, thus optimizing both energy efficiency and detection reliability
Solution Approach 2:
The patent changes operational parameters by adjusting the decision thresholds for switching between receivers based on channel quality. When channel conditions are good, the system uses WUR with appropriate sensitivity thresholds; when conditions worsen, it transitions to the main receiver with adjusted thresholds, allowing flexible adaptation to maintain reliable PEI detection while minimizing energy consumption
2Use of energy by moving object
If the WUR is used for PEI monitoring, then power consumption is minimized, but the false alarm rate may increase due to limited detection capability
Solution Approach 1:
The patent implements a feedback mechanism where the UE monitors the actual performance of WUR including false alarm events and channel conditions. Based on this feedback, the system adjusts switching thresholds and makes informed decisions about whether to use WUR or main receiver, thereby controlling false alarm rates while maintaining energy efficiency
Solution Approach 2:
The system dynamically adjusts the operational mode based on real-time channel quality assessment. When channel conditions indicate high reliability for WUR operation, the system uses WUR with appropriate thresholds; when conditions suggest higher false alarm risk, it switches to the main receiver, thus dynamically optimizing the trade-off between power consumption and false alarm rate
3Reliability
If the main receiver is used for PEI monitoring, then detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by using the full-capability main receiver only when absolutely necessary (i.e., when channel conditions are poor or false alarm risk is high). For the majority of time when conditions are favorable, the system uses the simpler WUR, thus avoiding excessive energy consumption while maintaining sufficient detection accuracy through selective use of the main receiver
Solution Approach 2:
The system changes the operational parameter of receiver selection based on channel quality parameters. By monitoring metrics such as RSRP, RSRQ, or SINR and comparing them against configured thresholds, the system determines whether to use WUR or main receiver, thus adapting energy consumption to actual channel conditions while maintaining adequate detection accuracy
4Reliability
If the UE processes multiple synchronization signals for PDSCH reception, then reception quality is improved, but energy consumption increases due to unnecessary processing
Solution Approach 1:
The patent uses PEI as a preliminary indicator that provides advance information about the presence of PDSCH before the actual paging occasion. By detecting PEI first using the low-power WUR, the UE can determine whether full PDSCH reception and processing is necessary, thus performing preliminary action to avoid unnecessary energy-consuming synchronization signal processing when no paging message is present
Solution Approach 2:
The patent segments the paging reception process into two distinct stages: first, PEI detection using WUR to determine if paging is present; second, if PEI indicates paging, then full PDSCH reception using the main receiver with appropriate synchronization signal processing. This segmentation allows the UE to avoid unnecessary processing in the second stage by filtering out non-paging occasions at the first stage
Data Source
AI summary
The efficient usage of receivers for paging-early-indication (PEI) reception in a user equipment (UE) is described. The UE determines to use a wake-up receiver (WUR) as the primary receiver for monitoring PEO when waking up in Discontinuous Reception (DRX). The WUR consumes less power than a main receiver of the UE. The UE detects, at the WUR, a PEI and activates the main receiver of the UE for monitoring a paging occasion (PO). Responsive to determining that a condition for using the WUR as the primary receiver for monitoring PEI when waking up in DRX is not satisfied. the UE switches to using the main receiver as the primary receiver for monitoring PEI when waking up in DRX and not using the WUR for monitoring PEI.