Low-Power Wake-Up Receiver for Adaptive PDCCH Monitoring
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Solution Overview
Problem
Current wireless communication systems face challenges in managing increased communication traffic and meeting low latency and low power consumption requirements, particularly in 5G and beyond, due to the lack of standardized methods for enabling and disabling a low power wake-up receiver (LR) based on downlink signal quality measurements.
Innovation Solution
A method and apparatus for a user equipment (UE) to receive event configuration information related to signal strength/quality for a downlink channel using a low power wake-up receiver (LR), perform measurements, and report these to the base station, enabling dynamic control of PDCCH monitoring operations based on LR measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the low power wake up receiver (LR) is continuously activated to monitor downlink signal quality, then the signal quality measurement capability is improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic action by configuring the UE to perform PDCCH monitoring operations only in specific occasions (when PDCCH monitoring indication is received) rather than continuously. The LR monitors downlink signal quality periodically at configured measurement occasions, and the main radio is activated only when needed based on event evaluation results, significantly reducing power consumption while maintaining measurement capability
Solution Approach 2:
The patent applies dynamics by making the PDCCH monitoring operation conditional and adaptive. The UE dynamically evaluates whether to perform PDCCH monitoring based on whether downlink signal quality events are satisfied, allowing the system to adapt between active monitoring and power-saving states based on real-time signal conditions
2Loss of time
If the PDCCH monitoring operation is performed continuously to ensure low latency, then the latency requirement is met, but the power consumption increases
Solution Approach 1:
The patent uses periodic action by configuring periodic PDCCH monitoring occasions and event evaluation intervals. The UE performs measurements and evaluations at configured periods, activating the main radio only when events are satisfied, thus reducing power consumption while maintaining timely response capability for low-latency requirements
Solution Approach 2:
The patent implements self-service by enabling the UE to autonomously evaluate downlink signal quality events and determine whether to perform PDCCH monitoring operations without continuous network control. The UE independently decides when to activate the main radio based on pre-configured event criteria, reducing latency while saving power
3Use of energy by moving object
If the LR is disabled to reduce power consumption, then the power consumption is reduced, but the capability to detect downlink signal quality deteriorates
Solution Approach 1:
The patent applies segmentation by separating the downlink signal quality measurement function from the main radio and assigning it to a dedicated low power wake up receiver (LR). The LR specifically handles measurement tasks while the main radio focuses on data transmission, allowing the measurement capability to be maintained with lower power consumption through specialized hardware
Solution Approach 2:
The patent uses the LR as an intermediary between the main radio and the measurement function. The LR acts as a mediator that performs downlink signal quality measurements and provides results to the main radio, enabling the system to maintain measurement capability while reducing overall power consumption by offloading measurement tasks to a low-power component
Data Source
AI summary
Provided are a method and apparatus for communication using a low power wake up receiver (LR). A user equipment (UE) receives event information related to the LR, evaluates whether at least one event included in the event information is satisfied based on measurement using the LR, and performs a physical downlink control channel (PDCCH) monitoring operation if the at least one event is satisfied based on the evaluation.