Multi-TRP PDCCH Reception Using Unified TCI and CORESET Pools

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Solution Overview

Problem

Existing wireless communication systems lack an efficient method for enabling the reception of a plurality of Physical Downlink Control Channels (PDCCH) from multiple Transmission Reception Points (TRPs) using the Unified Transmission Configuration Indicator (TCI) framework, leading to redundant signaling and inefficient beam management.

Innovation Solution

A method and system that utilizes Radio Resource Control (RRC) configuration messages to enable the reception of PDCCH from multiple TRPs by configuring CORESETs and search spaces, applying distinct TCI states based on CORESETpoolindex and TCI state indicating parameters, allowing multiple TCI states to be applied in multi-TRP scenarios.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If separate TCI indication is used for each PDCCH from multiple TRPs, then beam management precision is improved, but signaling overhead increases

Engineering Contradiction:

Improvebeam management precisionVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent segments the TCI indication mechanism by introducing a unified TCI framework that divides TCI states into two categories: unified TCI states applicable to multiple PDCCHs and TRP-specific TCI states for individual TRPs. This segmentation allows precise beam management through TRP-specific states while reducing overall signaling overhead by sharing common states across multiple TRPs.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The unified TCI framework provides multi-functionality by enabling a single TCI state to serve multiple PDCCHs from different TRPs simultaneously. The framework allows TCI states to be universally applied across multiple TRPs when beam directions are similar, eliminating redundant signaling while maintaining beam management precision when needed through TRP-specific overrides.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of information

If unified TCI framework is implemented for multiple TRPs, then signaling overhead is reduced, but beam management flexibility decreases

Engineering Contradiction:

Improvesignaling overheadVSAvoidbeam management flexibility

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The patent implements a dynamic TCI indication mechanism where the system can adaptively switch between unified TCI states and TRP-specific TCI states based on current beam management requirements. This dynamics allows the framework to be flexible and adaptable, selecting the most appropriate TCI indication mode for each scenario while maintaining low signaling overhead.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The framework performs preliminary configuration of unified TCI states that can be applied to multiple TRPs in advance. This preliminary action establishes a baseline TCI configuration that reduces immediate signaling requirements, while allowing subsequent TRP-specific TCI states to be applied when specific beam management flexibility is needed.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If multiple TCI states are applied to multiple PDCCHs, then reception reliability is improved, but system complexity increases

Engineering Contradiction:

Improvereception reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the TCI state application by introducing distinct unified TCI states and TRP-specific TCI states, allowing the system to apply multiple TCI states to multiple PDCCHs in a structured manner. This segmentation improves reception reliability by enabling TRP-specific beam management while controlling system complexity through a hierarchical state organization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The unified TCI framework acts as an intermediary layer between the physical layer beam management and the higher layer signaling. This intermediary framework simplifies the overall system complexity by providing a standardized mechanism for TCI state indication, while still enabling multiple TCI states to be applied to multiple PDCCHs for improved reception reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12556350B2Method and system for enabling reception of plurality of PDCCH from plurality of TRPs

Publication Date: 2026.02.17 SAMSUNG ELECTRONICS CO LTD

AI summary

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to the disclosure, a method and a User Equipment (UE) for enabling reception of plurality of Physical Downlink Control Channel (PDCCH) from plurality of Transmission Reception Points (TRPs) are provided. The method includes receiving, by the UE, at least one Radio Resource Control (RRC) configuration message in relation to at least one TRP of a plurality of TRPs within a cell in a wireless communication system, wherein the at least one RRC configuration message comprises one or more CORESETpoolindex for one or more corresponding CORESETs associated with the at least one TRP, and wherein the at least one RRC configuration message is used to configure the one or more CORESETs and a plurality of search spaces associated with each CORESET, and enabling reception of each PDCCH of a plurality of PDCCH from each TRP of the plurality of TRPs based on the at least one RRC configuration message.