Multi-TRP Beam Management Using TCI States and CORESET Groups
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beamforming and channel configurations in multi-TRP environments, leading to suboptimal performance and potential link failures in high-frequency bands.
Innovation Solution
Implementing a system where user equipment (UE) and base stations utilize a transceiver and processor to manage transmission configuration indication (TCI) states and CORESET groups, enabling joint TCI states for improved beam management and channel reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional beam management methods are used in multi-TRP systems, then system complexity is reduced, but beam stability and link reliability deteriorate in high-frequency bands
Solution Approach 1:
The patent segments beam management by introducing separate TCI state mechanisms for different TRPs. Each TRP can be independently configured with its own TCI states, allowing separate beam management for each transmission point while maintaining overall system reliability through coordinated operation
Solution Approach 2:
The patent implements preliminary action by pre-configuring multiple TCI states and CORESET groups before multi-TRP operation. The network pre-establishes the association between TCI states and CORESET groups, so that when multi-TRP transmission is needed, the UE can immediately utilize the pre-configured beam parameters without additional signaling delay
2Adaptability or versatility
If multiple TCI states are configured for multi-TRP operation, then beam management flexibility is improved, but configuration complexity and signaling overhead increase
Solution Approach 1:
The patent introduces a new dimension of organization by grouping CORESETs into CORESET groups and associating each group with specific TCI states. This dimensional organization (TCI states → CORESET groups → CORESETs → search spaces) provides a systematic framework for managing multiple TCI states without linearly increasing configuration complexity
Solution Approach 2:
The patent creates universal structures that serve multiple functions: TCI states serve both for PDCCH quasi-colocation indication and PDSCH beam indication; CORESET groups serve as intermediate structures for both control channel organization and beam management; the same framework supports both single-TRP and multi-TRP operations
3Measurement precision
If CORESET groups are introduced for TCI state association, then beam management precision is improved, but processing complexity at UE increases
Solution Approach 1:
The network performs preliminary action by pre-configuring the association between TCI states and CORESET groups through RRC signaling. This pre-configuration eliminates the need for real-time computation of TCI state mappings at the UE, reducing processing complexity during actual operation while maintaining precise beam management
Solution Approach 2:
CORESET groups serve as an intermediary structure between TCI states and physical channels. Instead of directly mapping TCI states to multiple CORESETs and search spaces (which would require complex UE processing), the CORESET group acts as a predefined mapping table that simplifies UE operations while achieving precise beam control
Data Source
AI summary
A method of operating a user equipment (UE) includes receiving downlink control information (DCI) indicating a plurality of transmission configuration indication (TCI) states; receiving first information in a control resource set (CORESET) configuration; and receiving second information indicating an association between one or more of the plurality of TCI states and the one or more CORESET groups. The first information indicates a value of CORESET group index provided by CORESETGroupIndex. The method further includes identifying, based on the CORESETGroupIndex indicated by the first information, a CORESET group of a CORESET in which a physical downlink control channel (PDCCH) carrying the DCI was received; determining, based on the identified CORESET group and the second information, a TCI state in the plurality of TCI states to use for reception of a physical downlink shared channel (PDSCH); and receiving the PDSCH using the determined TCI state.