TCI State Indication for Multi-TRP Channel Configuration

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Solution Overview

Problem

Existing communication technologies lack a method to efficiently indicate Transmission Configuration Indicator (TCI) states for multi-transmission reception points (M-TRP) while reducing signaling overhead.

Innovation Solution

A method and apparatus for indicating TCI states that configure a first channel based on multiple sets of TCI states and a second channel based on a single set of TCI states, allowing for improved signal quality in M-TRP transmissions by using quasi co-location information or spatial parameters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If unified TCI state is introduced to reduce signaling overhead, then signaling overhead is reduced, but the system cannot support multi-transmission reception point (M-TRP) scenarios

Engineering Contradiction:
Improvesignaling overheadVSAvoidM-TRP support
Core Design Contradiction:
Loss of informationVSAdaptability or versatility

Solution Approach 1:

The patent segments the TCI state configuration into multiple independent sets (first set, second set, etc.), where each set can be independently configured and activated for different TRPs. This allows the system to support M-TRP scenarios by assigning different TCI state sets to different transmission reception points, while still maintaining efficient signaling through unified indication mechanisms.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimension to TCI state management by organizing states into multiple sets that can be selectively activated. Instead of a single flat TCI state structure, the system now has a hierarchical structure with multiple sets, allowing efficient indication through activation commands that select which set to use, thereby supporting M-TRP without proportionally increasing signaling overhead.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If multiple sets of TCI states are configured for M-TRP, then M-TRP transmission capability is improved, but device complexity increases

Engineering Contradiction:
ImproveM-TRP transmission capabilityVSAvoidTCI state configuration complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-configuring multiple sets of TCI states through higher-layer signaling (RRC or MAC CE) before actual transmission occurs. The terminal receives and stores these pre-configured sets, then only needs to receive activation indications for specific sets during transmission. This separates the complex configuration phase from the simple activation phase, reducing real-time processing complexity.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces dynamic activation mechanisms where the terminal can switch between different TCI state sets based on activation indications. The system transitions from static single-set configuration to dynamic multi-set selection, allowing the terminal to adapt to different M-TRP scenarios by activating appropriate state sets while maintaining manageable complexity through standardized activation procedures.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS20250331052A1Method and apparatus for indicating TCI state, and device and medium
Publication Date: 2025.10.23 BEIJING XIAOMI MOBILE SOFTWARE CO LTD
  • US20250331052A1 patent drawing
  • US20250331052A1 patent drawing
  • US20250331052A1 patent drawing

AI summary

A method and apparatus indicate a transmission configuration indicator (TCI) state. The method includes: receiving configuration information in which the configuration information is configured to configure a first channel for a transmission based on N sets of TCI states and configure a second channel for a transmission based on one set of TCI states, where N is an integer greater than 1.