UE Auxiliary Information Reporting for Handover Configuration

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Solution Overview

Problem

In wireless communications, particularly in LTE-A systems, the destination base station often lacks the latest auxiliary information from the user equipment, leading to suboptimal configuration and potential interference issues during handovers, as the current mechanisms do not ensure timely reporting of updated auxiliary information to the new cell.

Innovation Solution

The user equipment determines whether to report newly reported auxiliary information to the destination base station by assessing the time difference between the handover command and the initial reporting time to the source base station, and if necessary, reports the information after switching to the destination cell, ensuring the destination base station receives the latest configuration details.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the source eNB forwards auxiliary information to the destination eNB in the handover preparation procedure, then the destination eNB can obtain the auxiliary information in advance, but the auxiliary information may not be the latest information when handover is executed

Engineering Contradiction:

Improvetime delay in obtaining auxiliary informationVSAvoidauxiliary information outdated

Core Design Contradiction:

Loss of timeVSLoss of information

Solution Approach 1:

The source eNB forwards auxiliary information to the destination eNB in advance during the handover preparation procedure, before the handover is executed. This preliminary action ensures the destination eNB has the information ready, but the patent acknowledges this information may become outdated by the time handover occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE monitors whether it has reported updated auxiliary information to the source eNB after the initial report. Based on this feedback, the UE determines whether to report the auxiliary information again to the destination eNB after handover, ensuring the destination eNB receives the latest information.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If the UE reports auxiliary information to the source eNB before handover, then the source eNB can use the information for configuration, but the destination eNB cannot obtain the latest updated information

Engineering Contradiction:

Improveconfiguration efficiency at source eNBVSAvoidlatest auxiliary information not available at destination eNB

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The UE reports auxiliary information to the source eNB in advance before handover occurs, enabling the source eNB to perform configuration efficiently using this information.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE proactively reports updated auxiliary information to the destination eNB after handover, ensuring the destination eNB has the latest information before it needs to use it for configuration.

Inventive Principle:

Principle #10Preliminary action

3Loss of information

If the UE always reports auxiliary information to the destination eNB after handover, then the destination eNB always has the latest information, but unnecessary reporting increases signaling overhead

Engineering Contradiction:

Improvelatest auxiliary information guaranteedVSAvoidsignaling overhead

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

The UE determines whether to report auxiliary information to the destination eNB based on feedback from its own reporting history. It checks whether it has already reported updated information to the source eNB after the initial report, and only reports to the destination eNB if the information may have been updated and not yet forwarded.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Instead of always reporting or never reporting, the UE performs partial reporting - it reports to the destination eNB only when necessary, based on the timing relationship between handover command reception and auxiliary information reporting to the source eNB.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP2916617B1Auxiliary information reporting and information sending method and device

Publication Date: 2017.07.12 CHINA ACAD OF TELECOMM TECH

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AI summary

The embodiments of this application relate to the field of wireless communications. Disclosed are an auxiliary information reporting and information sending method and device, so that a target base station can acquire the latest auxiliary information of a user equipment (UE) and then can provide the most reasonable configuration for the UE. In this application, the UE reports the auxiliary information to a source base station, and determines whether it is required to re-report the auxiliary information in a target cell; if determining that it is required to re-report the auxiliary information in the target cell, the user equipment reports the auxiliary information to the target base station after being switched to the target cell. It can be seen that, in this solution, the target base station can acquire the latest auxiliary information of the UE, so as to provide the most reasonable configuration for the UE.