RMSI CORESET Frequency Offset Configuration in 5G NR
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Solution Overview
Problem
The existing frequency offset configuration for RMSI CORESET with respect to SSB in 5G NR systems is not comprehensive, particularly considering factors like channel bandwidth and SS Raster, leading to limitations in supporting various multiplexing modes and bandwidth configurations.
Innovation Solution
A method and device for configuring system information that determines frequency offset parameters based on channel bandwidth, SCS, SS Raster, and RMSI CORESET bandwidth, allowing for comprehensive frequency offset configuration by combining these factors to improve protocol correctness and support more RMSI CORESET configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only 4 bits in PBCH are used to indicate frequency offset, then the indication capacity is limited to 16 cases, but this limits the support for comprehensive RMSI CORESET configurations across different bandwidths and multiplexing modes
Solution Approach 1:
The frequency offset indication is segmented into two parts: 4 bits in PBCH for coarse indication and additional bits in RMSI for fine adjustment. This segmentation allows the system to maintain the simple 4-bit structure while extending the total indication capacity to support comprehensive RMSI CORESET configurations across different bandwidths and multiplexing modes.
Solution Approach 2:
The solution adds another dimension to the frequency offset indication by introducing a second stage of indication in RMSI. Instead of relying solely on the 4 bits in PBCH, the system uses a two-dimensional indication structure where PBCH provides the first level and RMSI provides the second level, thereby expanding the total configuration space without increasing the complexity of the initial indication mechanism.
2Device complexity
If frequency offset configuration considers only SSB SCS and RMSI CORESET SCS combinations, then the configuration is simplified, but it fails to account for channel bandwidth and SS Raster variations
Solution Approach 1:
The frequency offset configuration is made dynamic by introducing multiple configuration tables corresponding to different channel bandwidths and SS Raster values. Instead of a static configuration, the system dynamically selects the appropriate configuration table based on the actual bandwidth and raster conditions, ensuring protocol correctness across diverse scenarios while maintaining manageable complexity through structured organization.
Solution Approach 2:
The solution changes the parameters used for frequency offset configuration from only SSB SCS and RMSI CORESET SCS to include channel bandwidth and SS Raster as additional parameters. By expanding the parameter set, the system achieves more accurate and reliable configurations that account for variations in bandwidth and raster, while the use of standardized parameter combinations keeps the overall complexity controlled.
Data Source
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AI summary
A system information configuration method and device are provided, related to the field of communications. The method includes: determining, based on a target parameter which is predetermined, a frequency offset configuration parameter of a Remaining Minimum System Information (RMSI) Control Resource Set (CORESET) with respect to a System Synchronization Block (SSB), where the target parameter includes one or more of a channel bandwidth parameter, a Subcarrier Spacing (SCS) parameter of RMSI, an SCS parameter of SSB, a System Synchronization (SS) Raster parameter, and a RMSI CORESET bandwidth parameter; and performing a frequency offset configuration of the RMSI CORESET with respect to the SSB according to the frequency offset configuration parameter.