Multi-Cluster CORESET for PDCCH Reliability
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face limitations in reliability due to the inability of physical downlink control channels (PDCCH) to have multiple transmission configuration indicator (TCI) states, which restricts overall transmission reliability to the weakest channel.
Innovation Solution
The implementation of multi-cluster CORESETs, where different clusters represent different resource block (RB) sets, each associated with a distinct TCI state, enables multiple TCI states for PDCCH, enhancing diversity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single TCI state is used for PDCCH, then device complexity is reduced, but transmission reliability deteriorates
Solution Approach 1:
The CORESET is divided into multiple RB sets, where each RB set is associated with a different TCI state. This segmentation allows the PDCCH to be transmitted across multiple spatial paths simultaneously, improving reliability without requiring the entire system to handle complex multi-state management.
Solution Approach 2:
Different RB sets within the CORESET are assigned different TCI states based on local channel conditions. Each RB set can be optimized for its specific transmission path, allowing the system to exploit spatial diversity while maintaining manageable complexity through localized configuration.
2Reliability
If multiple TCI states are implemented for PDCCH, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The CORESET is segmented into multiple RB sets, with each RB set associated with a distinct TCI state. This segmentation enables the system to implement multiple TCI states in a structured manner, where each RB set can be independently configured and managed, reducing the overall complexity compared to a monolithic multi-state approach.
Solution Approach 2:
The patent introduces a frequency-domain dimension by dividing the CORESET into multiple RB sets across different frequency resources. This dimensional approach allows multiple TCI states to be utilized simultaneously in different frequency portions, effectively increasing reliability while distributing the complexity across multiple dimensions rather than concentrating it in a single complex management structure.
Data Source
AI summary
Apparatus, methods, and computer-readable media for facilitating multi-cluster control resource sets for downlink control channel repetition are disclosed herein. An example method for wireless communication at a UE includes receiving a configuration for a CORESET having a first RB set associated with a first TCI state and a second RB set associated with a second TCI state. The example method also includes monitoring for a control signal in the first RB set and the second RB set. Another example method includes receiving a configuration for an SSS associated with a first CORESET having a first TCI state and a second CORESET having a second TCI state. The example method also includes monitoring for a control signal based on the configuration for the SSS.