UE Bandwidth Part Reference Signal Selection
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) faces inefficiencies in measuring cell quality due to the need to measure cell defining SS blocks (CD-SSB) outside the activated bandwidth part (BWP), leading to potential service interruptions and increased power consumption, especially when non-CD-SSBs are present within the activated BWP.
Innovation Solution
The UE configures multiple bandwidth parts and reference signals, activating only the necessary reference signal within the activated BWP to perform measurements, allowing it to derive cell quality based on either a primary or secondary reference signal without requiring measurement gaps, thus optimizing power usage and avoiding service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE measures the CD-SSB outside the activated BWP using measurement gap, then the cell quality measurement can be performed, but service interruption and additional power consumption occur
Solution Approach 1:
The patent dynamically selects the measurement reference signal based on the activated BWP configuration. When a non-CD-SSB is present in the activated BWP, the UE uses that reference signal for measurement instead of switching to measure CD-SSB outside the BWP, thereby avoiding measurement gaps and reducing power consumption while maintaining measurement accuracy
Solution Approach 2:
The patent extracts the measurement function from the mandatory CD-SSB measurement requirement and allows alternative reference signals (non-CD-SSB) within the activated BWP to serve as measurement references, eliminating the need to exit the activated BWP for measurement purposes
2Measurement precision
If the UE measures the CD-SSB outside the activated BWP using measurement gap, then the cell quality measurement can be performed, but service interruption occurs
Solution Approach 1:
The patent implements dynamic measurement reference signal selection that adapts to the activated BWP configuration. When suitable reference signals exist within the activated BWP, the UE performs measurements continuously without service interruption, maintaining both measurement precision and service reliability
3Adaptability or versatility
If the UE configures and activates multiple reference signals, then measurement flexibility increases, but device complexity increases
Solution Approach 1:
The patent applies local quality by configuring different reference signals for different BWPs, where each BWP has its own suitable reference signal for measurement. The UE activates only the reference signal corresponding to the currently activated BWP, maintaining measurement flexibility while simplifying device complexity through localized rather than global reference signal management
Data Source
AI summary
Provided are a method for performing a measurement by a user equipment (UE) in a wireless communication system, and an apparatus supporting the same. The method may include: configuring multiple bandwidth parts for a cell; configuring multiple reference signals for the cell; activating a first bandwidth part among the multiple bandwidth parts; when the activated first bandwidth part includes a first reference signal, activating the first reference signal included in the activated first bandwidth part; and performing the measurement for the cell based on the only activated first reference signal.