CORESET Selection Across QCL-TypeD Beams for PDCCH Repetition
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Solution Overview
Problem
Existing communication systems face limitations in efficiently monitoring physical downlink control channels (PDCCH) with different QCL-TypeDs, particularly in multi-TRP scenarios, leading to suboptimal PDCCH repetition and reliability in 5G NR networks.
Innovation Solution
The solution involves determining and selecting at least two control resource sets (CORESETs) with different QCL-TypeDs for monitoring PDCCH candidates, using various selection mechanisms that prioritize PDCCH repetition and beam diversity, including linking search space sets and applying new priority rules to enhance PDCCH reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control resource sets with different QCL-TypeDs are monitored for PDCCH candidates, then PDCCH reliability is improved through beam diversity, but device complexity increases due to multiple monitoring configurations
Solution Approach 1:
The patent segments the monitoring of control resource sets by introducing a linkage mechanism where search space sets are associated with specific CORESETs. This segmentation allows the UE to monitor multiple CORESETs with different QCL-TypeDs in a structured manner, dividing the complex monitoring task into manageable segments based on search space set associations.
Solution Approach 2:
The patent applies preliminary action by establishing search space set linkages to CORESETs in advance. The UE is configured with search space sets that are pre-associated with specific CORESETs having different QCL-TypeDs, allowing the UE to prepare multiple monitoring configurations beforehand. This preliminary configuration enables the UE to efficiently monitor PDCCH candidates across multiple beams without ad-hoc complexity during operation.
2Reliability
If PDCCH repetition is implemented across multiple CORESETs with different QCL-TypeDs, then robustness is enhanced, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent applies local quality by associating specific search space sets with CORESETs that have particular QCL-TypeD characteristics. Each search space set is locally optimized to monitor PDCCH candidates on specific beams (QCL-TypeDs), allowing the UE to detect PDCCH repetitions with different spatial characteristics using dedicated monitoring configurations tailored to each beam's properties.
Solution Approach 2:
The patent introduces search space sets as intermediaries between the UE and multiple CORESETs with different QCL-TypeDs. The search space sets act as mediators that organize and manage the monitoring of PDCCH candidates across multiple CORESETs, simplifying the detection process by providing a structured interface that handles the complexity of multi-beam monitoring.
3Adaptability or versatility
If search space sets are linked to specific CORESETs with different QCL-TypeDs, then beam diversity is achieved, but the extent of automation decreases due to manual configuration requirements
Solution Approach 1:
The patent applies dynamics by making the search space set to CORESET linkage configurable and adaptable. The system allows dynamic configuration of which search space sets are associated with which CORESETs, enabling the network to adapt the beam diversity configuration based on channel conditions and service requirements. This dynamic configurability provides beam diversity while maintaining flexibility in automation levels.
Data Source
AI summary
In accordance with example embodiments of the invention there is at least a method and apparatus to perform determining, by a network device of a communication network, that to monitor physical downlink control channel candidates of two or more control resource sets of the communication network, wherein the two or more control resource sets are using different QCL-TypeD; and selecting at least two control resource sets of the two or more control resource sets with different QCL-TypeD for monitoring at least two of the physical downlink control channel candidates.