Multipath Duplicate Transmission with ULI-Based Path Selection

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Solution Overview

Problem

The challenge is determining whether to apply redundant transmission through multipath in wireless communication systems.

Innovation Solution

The Session Management Function (SMF) receives User Location Information (ULI) of relay UE and remote UE to determine whether to apply redundant transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If redundant transmission through multipath is applied, then communication reliability is improved, but system complexity increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The SMF changes the parameter of transmission path selection by receiving ULI information and determining whether to apply redundant transmission based on location data, transforming a static system into one that dynamically adjusts transmission parameters based on environmental conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system performs preliminary action by receiving and processing ULI information before making the decision to apply redundant transmission, allowing the system to proactively configure multipath transmission based on predicted location-based conditions rather than reactively responding to failures

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If ULI information is collected and processed for redundant transmission decisions, then transmission path selection accuracy is improved, but information processing overhead increases

Engineering Contradiction:

Improvetransmission path selection accuracyVSAvoidinformation processing overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The SMF extracts only the necessary ULI information from the available data to make transmission decisions, taking out only the critical location parameters needed for path selection rather than processing all possible information, thereby reducing processing overhead while maintaining accuracy

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4593516A1Duplicate transmission method using multipath

Publication Date: 2025.07.30 LG ELECTRONICS INC

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AI summary

One disclosure of the present disclosure provides a method by which a remote UE performs communication. The method comprises the steps of: receiving, from a first AMF, an establishment request message of a first PDU session for a relay UE; establishing an N4 session for the first PDU session with a first UPF, wherein the relay UE relays an indirect path through the first PDU session for the remote UE; receiving a remote UE report from the first AMF, wherein the remote UE report includes ULI information of the relay UE; receiving, from a second AMF, an establishment request message of an MA PDU session for the remote UE, wherein the MA PDU session is through a non-3GPP access by the indirect path and a 3GPP access by a direct path and the establishment request message of the MA PDU session includes ULI information of the remote UE; establishing an N4 session for the MA PDU session with a second UPF; and determining whether to apply duplicate transmission through the MA PDU session on the basis of the ULI information of he relay UE and the ULI information of the remote UE.