UE Uplink Multiplexing Across TRPs Without Symbol Overlap Collisions

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Solution Overview

Problem

In 5G NR networks, user equipment (UE) faces confusion regarding whether to perform different uplink transmissions that are timely overlapped and transmitted to the same or different transmission reception points (TRPs), leading to collisions or disallowed transmissions.

Innovation Solution

The UE determines whether two uplink transmissions are associated with the same TRP before transmission, and if so, either drops one transmission or multiplexes them to avoid collisions, or multiplexes them if transmitted to different TRPs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the UE performs different UL transmissions that are timely overlapped and transmitted to different TRPs, then the UE should be allowable to perform such transmissions, but the latest 5G NR network may not allow the UE to perform such UL transmissions

Engineering Contradiction:

Improveability to perform overlapped UL transmissions to different TRPsVSAvoidcompliance with network rules

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the determination process into distinct steps: first determining whether transmissions are associated with the same TRP, then applying different rules based on that determination. This segmentation resolves the contradiction by enabling differentiated handling - allowing overlapped transmissions to different TRPs while preventing collisions to the same TRP

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic behavior by making the transmission permission dependent on real-time determination of TRP association. The system dynamically adjusts whether overlapped transmissions are allowed based on the specific TRP configuration, rather than applying a static blanket rule

Inventive Principle:

Principle #15Dynamics

2Reliability

If the UE performs different UL transmissions that are timely overlapped and transmitted to the same TRP, then it is considered as a collusion and the UE is not allowable to perform such UL transmissions, but the UE is confused about whether to perform such different UL transmissions to one TRP or to more TRPs

Engineering Contradiction:

Improveavoidance of transmission collisionsVSAvoidclarity of transmission rules

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies preliminary action by requiring the UE to determine TRP association before actually performing the transmissions. This pre-determination step provides clear guidance on whether overlapped transmissions are permitted, eliminating confusion while maintaining collision avoidance

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The determination mechanism provides feedback to the UE about whether its planned overlapped transmissions are permitted. This feedback loop clarifies the rules by explicitly indicating whether the UE should proceed with or drop certain transmissions based on TRP association

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250365116A1Method and user equipment for performing uplink transmissions to multiple transmission reception points

Publication Date: 2025.11.27 MEDIATEK INC

AI summary

Method and UE are provided for performing UL transmissions to multiple TRPs. In particular, a UE can determine whether two UL transmissions are associated with one TRP before being transmitted, and the two UL transmissions are overlapped in at least one symbol in time domain. In an event that the first UL transmission and the second UL transmission are associated with the TRP, the UE can drop one UL transmission and perform the other UL transmission, or multiplex two UL transmissions for transmission.