Terminal PDCCH Collision Handling via CORESET Priority
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Solution Overview
Problem
In previous NR specifications, the restriction on handling collisions of downlink control channels limits the ability of user equipment (UE) to receive multiple channels with different quasi-co-location (QCL) types D simultaneously, leading to restricted throughput and degraded communication quality.
Innovation Solution
A terminal is designed with a control section that determines and monitors downlink control channels in multiple control resource sets based on a priority rule, allowing appropriate handling of collisions by selecting a prioritized CORESET for monitoring based on transmission configuration indication states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE monitors multiple downlink control channels with different QCL types D simultaneously, then the throughput and communication quality are improved, but the device complexity and processing burden increase
Solution Approach 1:
The patent segments the downlink control channel monitoring by dividing control resource sets (CORESETs) into different groups based on their QCL type D associations. The UE monitors PDCCH candidates in a first CORESET group with first QCL type D and simultaneously monitors PDCCH candidates in a second CORESET group with second QCL type D, allowing parallel processing of different channel groups without overwhelming the device complexity
Solution Approach 2:
The patent introduces a new dimension of QCL type D differentiation to enable simultaneous monitoring of multiple downlink control channels. By associating different QCL types with different CORESET groups, the system allows the UE to expand its monitoring capability into multiple QCL dimensions, thereby improving throughput while maintaining manageable complexity through structured organization
2Reliability
If the UE monitors multiple downlink control channels with different QCL types D simultaneously, then the communication quality is improved, but the processing burden and energy consumption increase
Solution Approach 1:
The patent segments the monitoring task into distinct CORESET groups associated with different QCL types D, allowing the UE to process channels in an organized manner that improves communication quality while managing energy consumption through efficient resource allocation
Solution Approach 2:
The patent applies preliminary action by pre-configuring QCL type D associations with CORESET groups before monitoring begins. This allows the UE to prepare its reception capabilities in advance, reducing real-time processing burden and energy consumption during actual channel monitoring while maintaining high communication quality
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes: a control section that determines a downlink control channel (Physical Downlink Control Channel (PDCCH)) to monitor for PDCCHs in a plurality of control resource sets (CORESETs) overlapped in time, according to a transmission configuration indication state (TCI state) of only one CORESET selected based on a priority rule; and a receiving section that monitors the determined PDCCH. According to one aspect of the present disclosure, it is possible to appropriately handle collision of a plurality of downlink control channels.