UE Capability Reporting Abbreviation for Carrier Aggregation

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Solution Overview

Problem

In LTE-A systems, the complexity and size of capability information reported by user equipment (UE) to the network increase significantly due to new features like carrier aggregation, making efficient reporting challenging and resource-intensive.

Innovation Solution

The method involves abbreviating capability information using Bandwidth Class (BWC) parameters and signaling only necessary information elements, such as supported frequency bands, number of cells, and maximum bandwidths, to reduce the reporting complexity and size of the capability report.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If detailed capability information is reported to support new features like carrier aggregation, then the network can make better scheduling decisions and improve service quality, but the amount of information to be reported increases significantly

Engineering Contradiction:

Improvecapability reporting accuracyVSAvoidinformation reporting volume

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential capability information elements needed for network scheduling decisions, separating them from the complete set of UE capabilities. This selective extraction reduces the reporting volume while maintaining the reliability needed for carrier aggregation scheduling.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The capability information is segmented into multiple parts: essential information reported immediately, and detailed information reported separately or on demand. This segmentation allows the network to make scheduling decisions with essential info while obtaining detailed capabilities when needed.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If comprehensive capability information including all band combinations is reported, then the network can fully utilize UE capabilities for carrier aggregation, but the reporting complexity and processing overhead increase

Engineering Contradiction:

Improvecarrier aggregation supportVSAvoidreporting complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies partial action by reporting only the necessary subset of capability information for current network needs rather than all possible capabilities. The UE reports essential elements for carrier aggregation scheduling without including all band combinations, reducing complexity while maintaining adaptability.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The reporting mechanism becomes dynamic, allowing the UE to adapt the level of detail reported based on network requests and current operational context. The network can request specific capability subsets, and the UE dynamically provides only that information, reducing overall reporting complexity.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP3565290B1Method and apparatus for transmitting and receiving UE capability information in mobile communication system

Publication Date: 2022.01.12 SAMSUNG ELECTRONICS CO LTD

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AI summary

In order to transmit capability information of an UE (135) to an eNB (105), the UE (135) may generate a UE CAPABILITY INFORMATION message including the capability information of the UE (135), and transmit the generated UE CAPABILITY INFORMATION message to the eNB (105). Here, the capability information of the UE (135) may include at least one band combination supported by the UE (135) and whether Time Division Duplexing-Frequency Division Duplexing Carrier Aggregation (TDD-FDD CA) for the band combination is supported.