SSB Frequency-Domain Offset Indication Across Mixed SCS Rasters
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Solution Overview
Problem
In FR2x bands, the subcarrier spacing (SCS) of the synchronization signal block (SSB) is less than that of the common resource block (CRB), leading to undesirable indication effects of Kssb due to unusable sync rasters or channel rasters.
Innovation Solution
Determine a frequency-domain offset of the SSB using a first and/or second indicator field in the SSB, where the first field is an SSB frequency-domain offset indicator field, and the second field is part or all of at least one different indicator field, such as common SCS, PDSCH-DMRS, CORESET#0 configuration, or reserved bits, to indicate Kssb without requiring additional bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single indicator field (Kssb) is used to indicate frequency-domain offset, then the indication is simple, but the indication effect is undesirable due to unusable sync rasters or channel rasters
Solution Approach 1:
The frequency-domain offset indication is segmented into multiple indicator fields: the first indicator field (Kssb) indicates the lowest frequency of SSB resources relative to NCRBSSB, while the second indicator field provides additional offset information. This segmentation allows the system to overcome limitations of individual rasters by combining multiple indication sources, thereby improving indication accuracy without excessive complexity.
Solution Approach 2:
The patent introduces a second indicator field as an additional dimension for frequency-domain offset indication. This dimensional expansion allows the system to indicate offsets that cannot be represented by the single Kssb field alone, particularly when sync rasters or channel rasters are unusable. The combination of multiple indicator fields creates a more comprehensive indication space.
2Measurement precision
If additional indicator fields are introduced to improve indication accuracy, then frequency-domain offset determination is improved, but resource usage increases
Solution Approach 1:
The second indicator field is designed to serve multiple functions: it can indicate frequency-domain offset information, accommodate unusable sync raster or channel raster configurations, and work in conjunction with the first indicator field. This multi-functionality allows the system to improve indication accuracy without requiring entirely separate indication mechanisms, thereby optimizing resource usage.
Solution Approach 2:
The patent changes the parameter representation by using combinations of indicator fields rather than a single parameter. The first indicator field (Kssb) and second indicator field together provide a more flexible and accurate representation of frequency-domain offset, allowing the system to adapt to different raster configurations without excessive resource consumption.
Data Source
AI summary
This application provides a method and an apparatus for determining a frequency-domain offset, a communication device, and a readable storage medium. The method includes: detecting a synchronization signal block SSB; and determining, based on a first indicator field and/or a second indicator field in the SSB, a frequency-domain offset of the SSB with respect to a common resource block raster, where the first indicator field is an SSB frequency-domain offset indicator field, and the second indicator field is part or all of at least one indicator field different from the first indicator field.