Carrier Aggregation PDCCH Limits for Mixed Release Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current NR specifications lack clear solutions for determining PDCCH monitoring capabilities for carrier aggregation (CA) when a UE is configured with Rel-16 monitoring capability for all serving cells or with both Rel-15 and Rel-16 monitoring capabilities for different serving cells, particularly in multi-TRP scenarios.
Innovation Solution
A method for determining CA capability by transmitting and receiving parameters representing Rel-15 and Rel-16 PDCCH monitoring capabilities, allowing the UE to separately report its capabilities for different serving cells, and calculating maximum PDCCH candidates and non-overlapped CCEs based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a UE is configured with Rel-16 PDCCH monitoring capability for all serving cells, then monitoring efficiency is improved, but specification clarity and implementation consistency deteriorate due to lack of clear determination solutions
Solution Approach 1:
The patent segments the determination of CA capability into separate components: Rel-15 PDCCH monitoring capability parameters and Rel-16 PDCCH monitoring capability parameters. This segmentation allows the system to handle different release capabilities independently and combine them systematically, resolving the specification clarity issue while maintaining monitoring efficiency.
Solution Approach 2:
The patent introduces dynamic parameters including a first ratio for scaling Rel-15 capability and a second ratio for scaling Rel-16 capability. These dynamic scaling factors allow flexible adaptation of capability determination based on configuration, enabling the system to optimize monitoring efficiency while providing clear determination rules for different scenarios.
2Measurement precision
If a UE separately reports Rel-15 and Rel-16 PDCCH monitoring capabilities for different serving cells, then capability precision is improved, but signaling overhead increases
Solution Approach 1:
The patent uses a unified capability determination framework that works for both Rel-15 and Rel-16 configurations. The same set of parameters (first ratio, second ratio, maximum number of serving cells) serves multiple purposes: scaling different release capabilities, determining CA capability, and supporting mixed configuration scenarios. This multi-functionality reduces signaling overhead while maintaining precision.
Solution Approach 2:
The patent transforms detailed capability reports into scaled parameter representations. Instead of reporting full capability details separately, the system uses ratio parameters (first ratio for Rel-15, second ratio for Rel-16) that concisely represent capability levels. This parameter transformation maintains precision while significantly reducing signaling overhead.
3Adaptability or versatility
If the system supports both Rel-15 and Rel-16 PDCCH monitoring capabilities in multi-TRP scenarios, then system adaptability is improved, but determination complexity increases
Solution Approach 1:
The patent segments multi-TRP configuration handling by associating different PDCCH monitoring capability types with different TRP groups. Rel-15 capability parameters apply to one set of serving cells while Rel-16 capability parameters apply to another set, allowing independent optimization and simplifying the determination process for each TRP group.
Solution Approach 2:
The patent introduces dynamic scaling ratios (first ratio for Rel-15, second ratio for Rel-16) that can be adjusted based on the specific multi-TRP configuration. This dynamic approach allows the system to adapt to different scenarios while following a unified determination methodology, reducing overall complexity compared to handling each scenario separately.
Data Source
AI summary
According to some embodiments, a wireless device is operating in communication with two or more serving cells wherein at least one serving cell of the two or more serving cells is configured for release 16 reporting of physical downlink control channel (PDCCH) monitoring capabilities. The wireless device performs a method comprising transmitting a first parameter representing a release 16 PDCCH monitoring capability of the wireless device to a network node and determining a maximum number of PDCCH candidates and a maximum number of non-overlapped control channel elements (CCEs) based on a maximum number of release 16 capable serving cells, which is determined based on the transmitted first parameter.