PDCCH CORESET Selection by Slot Type in SBFD Duplexing
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently adapting control resource sets (CORESETs) to dynamic duplexing schemes like subband non-overlapping full duplex (SBFD), leading to increased power consumption and ineffective use of PDCCH resources due to overlapping UL and DL subbands, which affects capacity and latency.
Innovation Solution
The solution involves configuring user equipment (UE) with multiple CORESET configurations per search space, associating each with specific slot or symbol formats, and dynamically determining the active CORESET based on the slot/symbol format to optimize PDCCH monitoring, thereby minimizing signaling overhead and maintaining scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CORESET configurations are configured per search space for SBFD adaptation, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent segments the CORESET configuration by creating multiple distinct CORESET configurations (first CORESET configuration and second CORESET configuration), each optimized for specific slot formats. This segmentation allows the system to handle different duplexing scenarios (TDD, FDD, SBFD) with dedicated configurations, improving adaptability while managing complexity through structured organization.
Solution Approach 2:
The patent implements dynamic CORESET configuration selection where the UE dynamically determines which CORESET configuration to use based on the detected slot format. This dynamic adaptation mechanism allows the system to respond to changing duplexing modes in real-time, achieving high adaptability without permanently increasing operational complexity since only one configuration is active at a time.
2Reliability
If PDCCH monitoring is performed on all configured CORESETs, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamic PDCCH monitoring where the UE monitors PDCCH only on the CORESET configuration corresponding to the current slot format. This dynamic approach ensures reliable control channel reception by focusing monitoring efforts on the active configuration while avoiding unnecessary monitoring of inactive configurations, thereby significantly reducing power consumption compared to monitoring all CORESETs continuously.
3Adaptability or versatility
If slot format indication signaling is increased to improve CORESET selection accuracy, then adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements a self-service mechanism where the UE autonomously determines the active CORESET configuration by detecting the slot format according to pre-configured rules and associations. This self-determination approach eliminates the need for additional network signaling to indicate which CORESET should be used, achieving high selection accuracy while maintaining minimal signaling overhead.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for enhancing dynamic CORESET adaptation with limited or no control channel overhead. One method may include receiving, by a UE, a plurality of PDCCH CORESET configurations associated with at least one SS; determining, by the UE, at least one of the PDCCH CORESET configurations is associated with a symbol or slot format from a corresponding set of symbols; and performing, by the UE, PDCCH monitoring on an active control resource set configuration associated with the set of determined slots or symbols.