PUCCH Resource Index Determination for Multi-CORESET PDCCH Repetition
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Solution Overview
Problem
In wireless communication systems, particularly in new radio (NR) technology, determining a target resource index for a physical uplink control channel (PUCCH) corresponding to multiple physical downlink control channel (PDCCH) candidates with a linking relationship is challenging, as existing methods fail to efficiently handle PDCCH repetition across different control resource sets (CORESETs).
Innovation Solution
A method and apparatus for determining a target resource index for a PUCCH by configuring multiple PDCCH candidates with a linking relationship, where each candidate corresponds to a different CORESET, and using configuration parameters such as CORESET indexes, starting control channel element (CCE) indices, and number of CCEs to determine the PUCCH resource index, ensuring consistency and improving transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PDCCH candidates are configured for PDCCH repetition across different CORESETs, then reliability of control channel transmission is improved, but device complexity increases due to the need to determine target PUCCH resource index from multiple candidates
Solution Approach 1:
The terminal determines the target PUCCH resource index by itself using the CCE index of the first PDCCH candidate and the number of CCEs in the corresponding CORESET, without requiring additional network configuration or complex coordination procedures. This self-service approach reduces device complexity while maintaining reliability through PDCCH repetition
Solution Approach 2:
The patent changes the parameter used for PUCCH resource determination from a potentially complex multi-parameter selection process to a simplified calculation based on CCE index and CORESET size. By using the formula where PUCCH resource index is derived from CCE index modulo the number of PUCCH resources, the system transforms a complex selection problem into a straightforward parameter-based calculation
2Reliability
If PDCCH repetition is implemented across multiple CORESETs, then coverage is improved, but loss of time occurs due to the additional processing required for resource determination
Solution Approach 1:
The terminal performs the PUCCH resource index determination immediately upon receiving the PDCCH candidates, using pre-configured parameters (number of PUCCH resources, CORESET characteristics) that are already available. This preliminary action minimizes processing delay by not waiting for additional configuration or coordination steps
Solution Approach 2:
The terminal autonomously determines the target PUCCH resource index using locally available information (CCE index of first candidate, CORESET parameters) without requiring time-consuming network interactions or complex selection procedures, thereby reducing processing time while maintaining coverage through multi-CORESET repetition
Data Source
AI summary
A method for resource determination is performed by a terminal, and includes: determining a first resource index, wherein the first resource index is a target resource index of a physical uplink control channel (PUCCH) corresponding to N physical downlink control channel (PDCCH) candidates that have a linking relationship, and the N PDCCH candidates correspond to N control resource sets (CORESETs), where N is an integer greater than or equal to 2.