Wireless Device Relaxed Measurement for Power Saving
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Solution Overview
Problem
In wireless communication systems, particularly in 3GPP LTE and NR, there is a challenge in reducing power consumption during neighbor cell measurements, as existing methods do not effectively manage power usage while ensuring adequate measurement quality.
Innovation Solution
A method and apparatus that allow a wireless device to perform a relaxed measurement based on receiving cell quality and triggering thresholds, where the device identifies representative cells for each frequency and conducts measurements only when specific conditions are met, such as a reduced number of frequencies with high or low cell quality exceeding certain thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless device performs neighbor cell measurements on all frequencies, then measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The patent segments the measurement process by identifying representative cells for each frequency and performing measurements selectively based on triggering conditions. Instead of measuring all cells on all frequencies continuously, the system divides frequencies into groups and performs relaxed measurements on representative cells, reducing overall measurement load while maintaining mobility detection capability
Solution Approach 2:
The patent applies partial action by performing measurements only when triggering conditions are met (e.g., when serving cell quality deteriorates or neighbor cell quality improves). The system performs relaxed measurements on representative cells rather than full measurements on all cells, achieving sufficient measurement accuracy for mobility decisions while consuming less power
2Use of energy by moving object
If the wireless device performs relaxed measurements selectively, then power consumption is reduced, but measurement coverage may be insufficient
Solution Approach 1:
The patent performs preliminary actions by continuously monitoring triggering conditions (serving cell quality, neighbor cell quality) before initiating relaxed measurements. The system prepares measurement configurations in advance and activates relaxed measurements only when conditions warrant, ensuring measurement coverage is sufficient for mobility decisions while avoiding unnecessary power consumption
Solution Approach 2:
The system uses feedback from triggering condition evaluations to dynamically adjust measurement behavior. When triggering conditions indicate potential mobility events (serving cell degradation or neighbor cell improvement), the system activates relaxed measurements on representative cells, ensuring measurement coverage is maintained when needed while reducing power consumption during stable conditions
Data Source
AI summary
The present disclosure relates to performing measurement in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device in a wireless communication system comprises: receiving, from a network, information for at least one of a first cell quality threshold or a second cell quality threshold, and information for at least one of a first triggering threshold or a second triggering threshold; identifying a representative cell of each of a plurality of frequencies for measurement; obtaining a representative cell quality for each of the plurality of frequencies based on a measurement on the representative cell of each of the plurality of frequencies; and performing a relaxed measurement on the plurality of frequencies based on a determination that a triggering condition for the relaxed measurement is satisfied, wherein the triggering condition comprises at least one of: a condition that a number of frequencies for which representative cell quality is higher than the first cell quality threshold among the plurality of frequencies is lower than the first triggering threshold; or a condition that a number of frequencies for which representative cell quality is lower than the second cell quality threshold among the plurality of frequencies is higher than the second triggering threshold.