UE Capability Reporting During Handover With Target-Matched Data

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Solution Overview

Problem

In LTE and NR systems, when user equipment (UE) is handed over from a source to a target access network device, the reported UE capability information is often incomplete, leading to waste of air interface resources and inefficiencies due to redundant reporting of capabilities not supported by the target device.

Innovation Solution

The UE determines and reports only the capability information matching the target access network device, excluding what is already stored in the source, ensuring integrity and reducing the amount of reported information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE reports all capability information to the target access network device, then the target device obtains complete capability information, but the amount of reported data increases causing waste of air interface resources

Engineering Contradiction:

Improvecompleteness of UE capability informationVSAvoidamount of reported capability information

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The UE capability information is segmented into two parts: capability information already stored by the source access network device, and capability information that needs to be reported by the UE to the target access network device. This segmentation allows the target device to obtain complete capability information while minimizing the amount of data reported over the air interface.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The source access network device performs preliminary action by storing UE capability information before handover. This preliminary storage eliminates the need for the UE to report redundant capability information to the target device, reducing air interface resource waste while ensuring completeness.

Inventive Principle:

Principle #10Preliminary action

2Quantity of substance

If the UE reports only capability information matching the target access network device, then the amount of reported data is reduced, but the target device may obtain incomplete capability information

Engineering Contradiction:

Improveamount of reported capability informationVSAvoidcompleteness of UE capability information

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The target access network device merges two sources of UE capability information: capability information already stored by the source access network device, and capability information reported by the UE. This combination ensures the target device obtains complete capability information while the UE reports only the necessary additional information.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The source access network device acts as an intermediary that has already captured and stored UE capability information. This intermediary role allows the target device to inherit capability information from the source device, reducing the reporting burden on the UE while maintaining information completeness.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the UE reports complete UE capability information matching the target access network device, then the target device obtains all necessary information, but power consumption and transmission resources increase

Engineering Contradiction:

Improvecompleteness of UE capability informationVSAvoidpower consumption of UE

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The UE capability information is segmented into what is already stored by the source device and what needs to be reported. This segmentation reduces the reporting volume, thereby reducing UE power consumption and transmission resource usage while maintaining information completeness at the target device.

Inventive Principle:

Principle #1Segmentation

4Reliability

If the UE reports complete UE capability information matching the target access network device, then the target device obtains all necessary information, but transmission resources and reporting time increase

Engineering Contradiction:

Improvecompleteness of UE capability informationVSAvoidreporting time of UE capability information

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

By segmenting UE capability information into stored and reported portions, the reporting time is reduced since the UE only transmits the difference. This segmentation maintains information completeness while minimizing transmission time and improving reporting efficiency.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12634680B2UE capability reporting method and apparatus

Publication Date: 2026.05.19 HONOR DEVICE CO LTD

AI summary

A UE capability reporting method is provided to resolve a problem that when UE is handed over from a source access network device to a target access network device, UE capability information obtained by the target access network device is incomplete. A solution is as follows: UE obtains first information, where the first information is used to indicate a UE capability supported by a target access network device; and the UE reports second information based on the UE capability supported by the target access network device and a UE capability of the UE, where the second information includes capability information, other than UE capability information stored in a source access network device, in target capability information, and the target capability information is UE capability information of a lower UE capability in the UE capability of the UE and the UE capability supported by the target access network device.