SSB Measurement Window Segmentation for NR Terminal Power
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Solution Overview
Problem
In wireless mobile communication, especially in the new radio (NR) system, the current methods for mobility measurement using synchronization signal blocks (SSBs) are inaccurate due to varying positions of SSBs sent by cells, leading to missed measurements and deteriorated results for the serving cell.
Innovation Solution
A method where a terminal device receives specific time domain position information of SSBs from the serving cell and neighboring cells, allowing it to measure SSBs in separate measurement windows using more accurate information, reducing redundant measurements and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal device uses a bitmap (ssb-ToMeasure) to indicate a set of SSBs for measurement, then the measurement process is simplified, but the measurement accuracy deteriorates because the bitmap cannot accurately reflect the sending status of SSBs from all cells
Solution Approach 1:
The patent segments the measurement process into two distinct measurement windows: a first measurement window for measuring SSBs from the serving cell based on first information (time domain position), and a second measurement window for measuring SSBs from neighboring cells based on the bitmap. This segmentation allows each measurement window to use the most appropriate indication method for its target, thereby improving measurement accuracy while maintaining process simplicity.
2Reliability
If the terminal device measures all SSBs indicated by the bitmap, then the measurement coverage is comprehensive, but the power consumption increases due to redundant measurements on the serving cell
Solution Approach 1:
The patent divides the measurement process into two separate measurement windows with different measurement targets. The first measurement window is dedicated to measuring SSBs from the serving cell based on first information, while the second measurement window measures SSBs from neighboring cells based on the bitmap. This segmentation eliminates redundant measurements on serving cell SSBs that would otherwise be included in a comprehensive bitmap-based measurement, thereby reducing power consumption while maintaining measurement coverage.
Solution Approach 2:
The patent extracts the serving cell SSB measurement from the general bitmap-based measurement process. By separately indicating the time domain position of serving cell SSBs through first information and measuring them in a dedicated first measurement window, the solution removes redundant measurements that would occur if the terminal device followed the bitmap for all cells, thus reducing power consumption while preserving necessary measurement coverage.
3Device complexity
If the terminal device uses a single measurement window for all SSB measurements, then the measurement process is simple, but the measurement accuracy deteriorates because different cells have different SSB positions
Solution Approach 1:
The patent segments the single measurement window into two distinct measurement windows: a first measurement window configured for measuring serving cell SSBs based on first information (time domain position), and a second measurement window configured for measuring neighboring cell SSBs based on the bitmap. This segmentation resolves the contradiction by allowing each measurement window to be optimized for its specific measurement target, improving accuracy without significantly increasing overall process complexity.
Data Source
AI summary
Embodiments of this application provide a synchronization signal/physical broadcast channel block (SSB) measurement method and an apparatus. One example method includes that a terminal device receives first information and second information. The first information indicates a time domain position of an SSB sent by a serving cell, and the second information indicates a set of SSBs that the terminal device needs to measure and that are sent by a neighboring cell. The terminal device measures, in a first measurement window based on the first information, the SSB sent by the serving cell. The terminal device measures, in a second measurement window based on the second information, the SSB sent by the neighboring cell.