PUSCH Multi-TRP Scheduling with UL TCI for Reliable Beam Targeting

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Solution Overview

Problem

Existing NR systems lack efficient methods for PUSCH transmission targeting multiple TRPs, particularly in scenarios requiring high reliability like URLLC, due to inflexible spatial relation handling and limited beam flexibility.

Innovation Solution

Implementing UL TCI states for PUSCH scheduling, allowing multiple TRP targeting by indicating different TCI states in UL DCI, enabling flexible beam selection and redundancy version application for improved reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional spatial relation handling is used for PUSCH transmission, then the system maintains simplicity in beam management, but the system lacks flexibility in targeting multiple TRPs and achieving high reliability for URLLC applications

Engineering Contradiction:

Improvebeam flexibilityVSAvoidspatial relation handling

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces a unified TCI framework that serves multiple functions: it indicates spatial relations for PUSCH transmission, identifies target TRPs, and enables multi-TRP transmission. This single mechanism replaces the need for separate spatial relation handling procedures, providing multi-functionality that improves adaptability while managing complexity through consolidation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent enables dynamic selection and indication of TCI states for PUSCH transmission. The gNB can dynamically indicate which TCI state(s) to use for each PUSCH transmission occasion, allowing the system to adapt to changing channel conditions and reliability requirements in real-time, thereby improving beam flexibility and adaptability.

Inventive Principle:

Principle #15Dynamics

2Reliability

If single TRP targeting is used for PUSCH transmission, then the system maintains simplicity in transmission scheduling, but the system achieves limited reliability for high-reliability scenarios like URLLC

Engineering Contradiction:

ImprovePUSCH transmission reliabilityVSAvoidmulti-TRP scheduling

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the transmission diversity by introducing multiple TCI states, where each TCI state corresponds to a different target TRP. This segmentation allows the system to transmit the same data to multiple TRPs through different spatial paths, thereby improving reliability through diversity while managing complexity through structured state indication.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent prepares multiple TCI states in advance, each representing a pre-configured spatial relation and target TRP. By having these states ready beforehand, the system can quickly switch between them or activate multiple simultaneously to cushion against potential transmission failures, ensuring high reliability for URLLC applications without requiring complex real-time decisions.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Adaptability or versatility

If inflexible spatial relation handling is used, then the system maintains simplicity in configuration management, but the system lacks the capability to support multiple TRP targeting and advanced beam management

Engineering Contradiction:

Improvemulti-TRP targeting capabilityVSAvoidTCI state configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces TCI states as configurable parameters that define spatial relations and target TRPs. By changing these parameters dynamically through DCI indication, the system can adapt to different multi-TRP scenarios without requiring complex structural changes. The parameter-based approach enables flexible configuration management while supporting advanced beam management capabilities.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260100789A1Pusch multiple TRP reliability with UL TCI indication

Publication Date: 2026.04.09 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Systems and methods to support Physical Uplink Shared Channel (PUSCH) multi-Transmission/Reception Point (TRP) scheduling are provided. In some embodiments, the wireless device performs one or more of: obtaining a configuration for Transmission Configuration Indicator (TCI) states for Uplink (UL) PUSCH scheduling; activating/deactivating a subset of configured TCI states). If two TCI states are indicated, the wireless device transmits two different PUSCHs each corresponding to one of the indicated TCI states. If one TCI state is indicated, the wireless device transmits a single PUSCH corresponding to the indicated TCI state. The wireless device maps indicated TCI states to the transmission occasions or actual repetitions is preconfigured via higher layer parameter(s) or is given by a predefined rule. The wireless device applies a Transmitted Precoding Matrix Indicator (TPMI) to transmission occasions or actual repetitions associated with each indicated TCI state based on a signaled value and/or a predefined value.