Type0-PDCCH Timing Offsets for High-SCS Initial Access
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Solution Overview
Problem
Current communication standards fail to adequately provide solutions for determining the number of subframes/slots between an SSB burst and the first index of a Type0-PDCCH common search space (CSS) for 480 kHz and 960 kHz subcarrier spacing (SCS) in wireless communication networks.
Innovation Solution
Techniques for determining the number of subframes/slots between an SSB burst and the first index of a Type0-PDCCH CSS by using hardcoded offset values and scaling factors, or determining offset values from candidate values modified by a delta value based on SCS, to enable synchronization and communication with base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current communication standards are used, then existing synchronization methods work for lower SCS, but they fail to provide solutions for determining the number of subframes/slots between SSB burst and Type0-PDCCH CSS for 480 kHz and 960 kHz SCS
Solution Approach 1:
The patent introduces new parameters (K1, K2, K3) specifically for high SCS scenarios (480 kHz and 960 kHz) that differ from traditional timing parameters. These parameters enable accurate timing determination for Type0-PDCCH CSS in high SCS scenarios while maintaining compatibility with existing standards for lower SCS values through conditional parameter selection.
2Measurement precision
If new timing parameters are introduced for high SCS, then timing determination accuracy improves, but device complexity increases
Solution Approach 1:
The patent applies different parameter sets (K1, K2, K3) specifically to high SCS scenarios (480 kHz and 960 kHz) rather than changing the entire parameter management system. This localized approach maintains simplicity for the majority of lower SCS scenarios while providing precise timing control only where needed for high SCS operations.
Solution Approach 2:
The timing determination process is segmented into different parameter sets based on SCS thresholds. The patent divides the parameter space into traditional parameters for lower SCS and new parameters (K1, K2, K3) for high SCS, allowing each segment to be optimized independently without affecting the other segments.
3Adaptability or versatility
If conditional parameter selection is implemented, then support for multiple SCS scenarios improves, but ease of operation deteriorates
Solution Approach 1:
The patent implements self-service through automated parameter selection based on SCS threshold comparisons. The system automatically determines which parameter set (traditional or new K1, K2, K3) to use based on the detected SCS value, eliminating the need for manual parameter configuration and reducing operational complexity despite supporting multiple scenarios.
Data Source
AI summary
A base station and user equipment (UE) may determine, based on a synchronization signal block (SSB) burst and an offset, an index slot, of a system frame number (SFN), corresponding to a Type0-PDCCH common search space (CSS). The base station may transmit, and the UE may receive, a PDCCH signal that includes the Type0-PDCCH CSS, such that the UE may monitor the Type0-PDCCH CSS from the base station. The offset (Ou) may be hardcoded as one of values 0, 2.5, 5, or 7.5, and one offset value may be used for one, more than one, or all SCS numerologies. The offset may be modified by a delta (Δ) value, a scaling factor, and/or a combination thereof.