UE Connection Selection Using Moving IAB Node Attributes

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Solution Overview

Problem

In wireless communication systems with moving IAB nodes, user equipment (UE) often experiences unnecessary handovers due to selecting inappropriate connection destinations, leading to degraded system efficiency.

Innovation Solution

Communication apparatuses transmit and receive notification signals with attribute information indicating whether the IAB node is moving, allowing UE to selectively connect to non-moving IAB nodes and prevent unnecessary handovers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UE connects to a moving IAB node, then connection availability is improved, but handover frequency increases and system efficiency deteriorates

Engineering Contradiction:

Improveconnection availabilityVSAvoidsystem efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The IAB node transmits notification signals in advance to indicate its moving attribute before UE establishes connection. This preliminary information provision allows UE to make informed connection decisions, avoiding future handover issues while maintaining connection availability where appropriate.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback through notification signals that provide moving attribute information from IAB nodes to UE. This feedback mechanism enables UE to adjust its connection strategy based on the mobility characteristics of available IAB nodes, optimizing the balance between connection availability and handover frequency.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If UE selects connection destination based on signal strength alone, then connection establishment is simplified, but unnecessary handovers occur

Engineering Contradiction:

Improveconnection establishmentVSAvoidhandover time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

Notification signals containing moving attribute information are transmitted beforehand during the connection establishment process. This allows UE to incorporate mobility considerations without adding complex post-connection handover procedures, maintaining operational simplicity while reducing unnecessary handovers.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If IAB node transmits notification signal with moving attribute, then UE can make informed connection decisions, but signal complexity increases

Engineering Contradiction:

Improveconnection decision accuracyVSAvoidsignal structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The notification signal is segmented into distinct functional elements, with the moving attribute information as a separate, identifiable component. This segmentation allows UE to efficiently extract the critical mobility information without processing the entire signal structure, maintaining decision accuracy while managing complexity.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20260046837A1Communication apparatus, control method, and computer-readable storage medium

Publication Date: 2026.02.12 CANON KK

AI summary

A communication apparatus receives a notification signal from an Integrated Access and Backhaul (IAB) node, performs determination of whether attribute information indicating that an IAB node as a transmission source of the notification signal is a moving IAB node configured to be movable is included in the notification signal, and decides, based on the determination, whether to perform connection to the IAB node as the transmission source of the notification signal.