Sidelink Relay Establishment Cause Alignment

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current wireless communication networks face challenges in ensuring that remote communication devices and relay devices set the correct establishment cause for network access, particularly in emergency situations where priority access is crucial.

Innovation Solution

The method involves determining the establishment cause for connecting to a network node, transmitting this cause to a relay communication device, and establishing a connection through the relay device, ensuring that the establishment cause is aligned between the remote and relay devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If relay device independently sets establishment cause for network access, then relay device can autonomously manage connection, but establishment cause may not align with remote device causing access rejection

Engineering Contradiction:

Improveautonomous connection managementVSAvoidaccess approval

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The relay device receives the establishment cause from the remote device and uses this feedback information to set its own establishment cause for network access, ensuring alignment between the two devices and preventing access rejection

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The establishment cause information acts as an intermediary that is transmitted from the remote device to the relay device, enabling the relay device to correctly represent the remote device's access priority to the network

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If relay device uses default establishment cause, then connection setup is simplified, but priority access for emergency services is compromised

Engineering Contradiction:

Improveconnection setup procedureVSAvoidpriority access guarantee

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The remote device determines and transmits its establishment cause to the relay device before the relay device establishes network connection, ensuring the relay device has the correct priority information in advance

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The establishment cause parameter is dynamically adjusted by the relay device based on the received information from the remote device, changing from a default static value to a context-aware value that reflects emergency or priority service requirements

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250185121A1Handling of Establishment Causes in Sidelink Relay Scenarios

Publication Date: 2025.06.05 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A remote communication device (110) determines (510) an establishment cause for connecting to a network node (120A, 120B) of a communications network. Further, the remote communication device (110) transmits (520,530) a message including the establishment cause to a relay communication device (110). Responsive to transmitting the message, the remote communication device (110) establishes (540) a connection to the network node (110) via the relay communication device.