Cross-Link Interference Measurement for Low-Power UE Cell Dormancy
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Solution Overview
Problem
Managing cross-link interference in wireless communication systems when user equipment (UE) switches to a dormant mode poses challenges, affecting power consumption and battery life.
Innovation Solution
A UE identifies a non-dormant mode configuration for measuring cross-link interference and switches to a dormant mode with a specific configuration to measure interference, reducing power consumption by increasing measurement periodicity, decreasing resource usage, and adjusting bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE performs cross-link interference measurement in dormant mode with standard configuration, then measurement accuracy is maintained, but power consumption increases
Solution Approach 1:
The patent applies parameter changes by modifying the cross-link interference measurement configuration specifically for dormant mode. This includes adjusting measurement periodicity, reducing the number of measurement resources, and modifying bandwidth parameters. These parameter adjustments enable the UE to perform necessary interference measurements while consuming significantly less power compared to standard mode measurements.
Solution Approach 2:
The patent implements partial action by performing a reduced set of interference measurements appropriate for dormant mode rather than full measurements. The UE measures interference at key moments (such as before and after dormant mode transitions) and uses selective measurement resources, avoiding the excessive action of continuous full-configuration measurements while still maintaining sufficient measurement accuracy for effective dormant mode operation.
2Use of energy by moving object
If UE increases measurement periodicity to reduce power consumption, then power consumption decreases, but measurement frequency is reduced
Solution Approach 1:
The patent applies periodic action by implementing interrupted periodic measurements for cross-link interference in dormant mode. Instead of continuous measurements, the UE performs measurements at specific periodic intervals (e.g., before entering dormant mode, after exiting, and at configured intervals during dormant mode). This periodic action pattern reduces power consumption by keeping the measurement function inactive between periods while still providing sufficient measurement data for effective dormant mode management.
3Use of energy by moving object
If UE decreases resource usage for interference measurement, then power consumption decreases, but measurement coverage is reduced
Solution Approach 1:
The patent applies local quality by tailoring the interference measurement resources to specific local conditions and requirements in dormant mode. Instead of using full measurement resources across all frequencies and time periods, the UE allocates measurement resources to specific local areas where interference is most likely to occur (such as around dormant mode transition times and in specific frequency bands). This localized measurement approach maintains measurement coverage where needed while reducing overall resource consumption.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A UE may identify a non-dormant mode configuration for measuring cross-link interference in a non-dormant mode for a cell. The UE may receive, from a base station, an indication to switch to a dormant mode for the cell and may identify a dormant mode configuration for measuring the cross-link interference in the dormant mode. The UE may measure the cross-link interference in the dormant mode based on the identified dormant mode configuration and receiving the indication to switch to the dormant mode. The UE may transmit, to the base station, an indication of the measured cross-link interference.