mTRP sTRP Mode Switching TCI State Rules

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Solution Overview

Problem

Wireless communication systems face inefficiencies when switching between single and multiple transmission and reception point (TRP) modes due to dynamic changes in transmission configuration indication (TCI) states, leading to suboptimal channel configurations and communication performance.

Innovation Solution

The user equipment (UE) detects changes in TCI states by comparing downlink control information and adjusts channel configurations using predefined rules to switch between single TRP (sTRP) and multiple TRP (mTRP) modes, ensuring efficient communication by selecting appropriate TCI states for different modes and supporting quasi-co-location assumptions and channel state information reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the system uses preconfigured channels with fixed TCI states, then channel configuration is simple and stable, but the system cannot adapt to dynamic switching between sTRP and mTRP modes

Engineering Contradiction:

Improveadaptability to TRP mode switchingVSAvoidchannel configuration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the TCI state configuration dynamic rather than fixed. The UE dynamically determines which TCI states to use based on the current TRP mode (sTRP or mTRP) through predefined rules, allowing the system to adapt to mode switching while maintaining manageable configuration complexity through rule-based automation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of TCI state selection based on the TRP mode. When switching between sTRP and mTRP modes, the system changes which TCI states are active and how they are applied to channels, enabling adaptability through parameter modification rather than requiring complete reconfiguration.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the system dynamically changes the number of TCI states for TRP mode switching, then communication performance can be optimized, but the preconfiguration of channels becomes invalid

Engineering Contradiction:

Improvecommunication performanceVSAvoidchannel configuration stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by establishing predefined rules in advance that govern how channels should behave when TRP mode changes. These rules are prepared beforehand and automatically apply when mode switching occurs, ensuring reliable communication performance while maintaining configuration stability through predetermined behavior rather than ad-hoc changes.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback mechanisms where the UE monitors the current TRP mode and adjusts TCI state selection accordingly based on predefined rules. This feedback loop ensures that channel configurations remain stable and reliable by continuously adapting to mode changes through established protocols rather than creating instability through arbitrary reconfiguration.

Inventive Principle:

Principle #23Feedback

3Reliability

If the UE manually configures TCI states for each TRP mode, then communication can be optimized for each mode, but the operation becomes complex and time-consuming

Engineering Contradiction:

Improvecommunication optimizationVSAvoidconfiguration operation simplicity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies self-service by enabling the UE to automatically determine and apply the appropriate TCI states based on the current TRP mode using predefined rules. The system serves itself by autonomously selecting TCI states without requiring manual configuration, thereby maintaining communication optimization while dramatically simplifying operation through automation.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20240113844A1BEAM SWITCH RULES ASSOCIATED WITH SWITCHING BETWEEN MULTIPLE TRANSMISSION AND RECEPTION POINT (mTRP) and SINGLE TRP (sTRP)

Publication Date: 2024.04.04 QUALCOMM INC

AI summary

In a unified transmission configuration indicator (TCI) framework, certain channels are preconfigured to use a fixed number of TCI states. However, these preconfigured channels are not currently updated when the number of TCI states dynamically change during a switch between single and multiple transmission and reception point (TRP) modes. To alleviate this problem, a user equipment (UE) may receive downlink control information (DCI) indicating a first number of TCI states and, prior to the DCI, downlink information indicating a second number of TCI states, detect a switch between the multiple TRP (mTRP) and single TRP (sTRP) modes based on the first number of TCI states being different than the second number of TCI states, and communicate in a channel configured to use a selected TCI state associated with the first number of TCI states using a predefined rule based on the switch between the mTRP and sTRP modes.