Terminal NCD-SSB Synchronization Raster Determination
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Solution Overview
Problem
In the New Radio (NR) system, terminals face challenges in efficiently accessing cells due to the difficulty in determining the Global Synchronization Channel Number (GSCN) of a Cell Defining SSB (CD-SSB) when using a Non Cell Defining SSB (NCD-SSB), leading to increased synchronization delay and reduced access efficiency.
Innovation Solution
The proposed solution involves a method and apparatus for determining information based on detected NCD-SSBs, where the terminal determines first information from the NCD-SSB on a specific synchronization raster, and then uses this information to determine target information, including resource information for synchronization rasters associated with CD-SSBs or those without CD-SSBs, thereby optimizing the cell access process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind detection is performed according to the global frequency raster, then the terminal can access the cell, but the synchronization delay becomes large
Solution Approach 1:
The patent divides the cell access process into two stages: first performing blind detection based on global frequency raster to obtain initial synchronization, then using the obtained synchronization information to determine the GSCN and perform refined detection on the synchronization raster. This segmentation reduces the overall search space and synchronization delay while maintaining reliable cell access capability.
2Measurement precision
If the terminal uses NCD-SSB for cell searching, then the terminal can detect synchronization signals, but the terminal cannot determine the GSCN of CD-SSB
Solution Approach 1:
The patent uses the NCD-SSB as an intermediary to obtain partial synchronization information, then uses this intermediate result to guide the determination of the GSCN. The NCD-SSB detection serves as a bridge that enables the terminal to transition from complete blind detection to targeted detection on the synchronization raster, even though the NCD-SSB itself does not contain direct GSCN information.
Solution Approach 2:
The patent performs preliminary detection of the NCD-SSB to obtain initial synchronization information before attempting to determine the GSCN. This preliminary action provides the necessary foundation for subsequent GSCN determination and CD-SSB detection, enabling a more efficient two-stage access process.
3Reliability
If blind detection is performed to determine GSCN, then the terminal can access the cell, but the access efficiency becomes low
Solution Approach 1:
The patent implements a dynamic two-stage detection strategy that adapts the detection approach based on the detected signal type. When NCD-SSB is detected, the system dynamically transitions to using the determined GSCN information to guide CD-SSB detection on the synchronization raster. This dynamic adaptation significantly improves access efficiency while maintaining reliable cell access capability.
Data Source
AI summary
This application discloses an information determination method, a terminal, and non-transitory computer-readable storage medium. The information determination method includes: a terminal determines first information based on a non cell defining synchronization signal and PBCH block (NCD-SSB) detected on a first synchronization raster, and the terminal determines target information based on the first information. The first information includes at least one piece of information in a master information block (MIB) in the NCD-SSB, first resource information of the first synchronization raster, or a subcarrier spacing (SCS) of the NCD-SSB. The target information includes at least one of the following: second resource information of a first frequency-domain resource on which a second synchronization raster exists, or third resource information of a second frequency-domain resource on which no CD-SSB exists. The second synchronization raster is a synchronization raster of a cell defining synchronization signal and PBCH block (CD-SSB).