Wake-Up Receiver Cell Measurement With Relaxed Main Radio Scanning
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Solution Overview
Problem
In next-generation mobile communication systems, there is a need for efficient methods and apparatuses to measure serving cells using low-power wake-up receivers to optimize power consumption and performance, particularly for user equipment (UE) in idle or inactive states.
Innovation Solution
A method and apparatus that utilize a low-power wake-up receiver (LR) in conjunction with a main radio (MR) for UE to perform cell reselection measurements, where the LR takes over when certain measurement conditions are met, allowing for relaxed measurement processes and efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the main radio (MR) performs cell reselection measurements continuously, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent divides the measurement function into two segments: the low-power wake-up receiver (LP-WUR) performs initial cell identification and basic measurements, while the main radio (MR) performs detailed measurements only when necessary. This segmentation allows the system to maintain measurement capability while significantly reducing overall power consumption by using the energy-efficient LP-WUR for routine tasks.
Solution Approach 2:
The patent implements partial measurement action where the LP-WUR performs only essential cell identification and basic signal strength measurements, rather than full measurements. The MR then performs complete measurements only when the LP-WUR detects potential cell changes or when configured by the network. This partial action approach maintains adequate measurement precision while reducing power consumption.
2Use of energy by moving object
If the terminal performs relaxed measurement, then power consumption is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent implements dynamic measurement precision adjustment where the measurement mode (relaxed or normal) is adaptively changed based on terminal mobility state, serving cell signal quality, and network configuration. When the terminal is stationary or moving slowly with good signal quality, relaxed measurement is used to save power. When mobility increases or signal quality deteriorates, the system dynamically switches to normal measurement to maintain precision.
Solution Approach 2:
The patent incorporates feedback mechanisms where the network monitors terminal measurement reports and mobility behavior, then adjusts measurement configuration accordingly. The terminal also monitors serving cell quality and autonomously adjusts measurement precision, providing feedback to the network for further optimization. This feedback loop ensures measurement precision is maintained while maximizing power savings through relaxed measurement when conditions permit.
3Use of energy by moving object
If the low-power wake-up receiver (LP-WUR) is used for measurement, then power consumption is reduced, but measurement capability is limited
Solution Approach 1:
The patent makes the LP-WUR multi-functional by enabling it to perform not only its traditional wake-up function but also cell identification, basic signal strength measurement, and cell change detection. The LP-WUR can operate independently for basic measurements and collaborates with the MR for comprehensive measurement, making it a universal receiver that handles multiple functions across different operational scenarios.
Solution Approach 2:
The patent introduces the LP-WUR as an intermediary between the MR and the cell measurement function. The LP-WUR acts as a preliminary filter that identifies candidate cells and provides initial measurement data, which then guides the MR's measurement activities. This intermediary role allows the LP-WUR to extend measurement capability beyond what a single receiver could achieve alone, combining its low-power operation with the MR's full measurement capability when needed.
Data Source
AI summary
The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. A method and an apparatus for measuring a serving cell of a user equipment (UE) supporting a low-power wake-up receiver in a next-generation mobile communication system are provided. The method includes receiving, from a base station, configuration information on a cell reselection, preforming a measurement based on the configuration information using a main radio (MR) of the terminal, and in case that a result of the measurement is higher than a predetermined threshold, determining to relax the measurement using the MR of the terminal.