Carrier Aggregation System Information Update via Special Cell

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Solution Overview

Problem

In communication systems supporting carrier aggregation, there is a challenge in efficiently updating system information across user equipment as they move between component carriers, leading to potential service disruptions and increased signaling load.

Innovation Solution

A method and apparatus for providing and receiving system information in a communication system supporting carrier aggregation, which involves generating information indicating changes in system information, determining a special cell connected to the user equipment, and transmitting this information through the special cell to ensure timely updates without overwhelming the signaling system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If system information is broadcast across all component carriers, then user equipment receives timely updates, but signaling load increases significantly

Engineering Contradiction:

Improvesystem information update reliabilityVSAvoidsignaling load

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent segments the system information update notification process by identifying and selecting only the specific component carrier(s) where the system information change occurs, rather than broadcasting to all component carriers. This segmentation reduces the quantity of signaling messages while ensuring that user equipment connected to the affected component carrier receives the update notification.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by making the system information update notification targeted and location-specific to the affected component carrier. Instead of uniform broadcasting across all carriers, the notification is localized to only those carriers where changes occurred, optimizing resource usage while maintaining update reliability for affected user equipment.

Inventive Principle:

Principle #3Local quality

2Reliability

If system information is updated on all component carriers, then no user equipment misses updates during carrier switching, but power consumption increases

Engineering Contradiction:

Improvesystem information consistencyVSAvoiduser equipment power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent segments the system information update process to identify only the specific component carrier(s) where changes occur. User equipment monitoring those specific carriers receives updates without needing to continuously monitor all component carriers, thereby reducing power consumption while maintaining consistency for carriers that actually changed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies partial action by updating and notifying only on the subset of component carriers where system information actually changed, rather than performing full updates across all carriers. This partial action maintains necessary consistency while reducing the energy expenditure required for continuous monitoring and updating of all carriers.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If system information changes are notified on every component carrier, then user equipment stays synchronized, but service disruption risk increases due to signaling overhead

Engineering Contradiction:

Improveuser equipment synchronizationVSAvoidservice continuity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments the notification process to target only the specific component carrier(s) where system information changes occurred. This segmentation reduces signaling overhead and the associated service disruption risk, while user equipment connected to those specific carriers remains synchronized through targeted notifications.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses the affected component carrier as an intermediary to deliver system information update notifications only where necessary. This intermediary approach maintains synchronization for affected user equipment without generating unnecessary signaling on other carriers, thereby reducing service disruption risk from signaling overhead.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250133603A1Communication system for supporting carrier aggregation and method and apparatus for updating system information thereof

Publication Date: 2025.04.24 SONY GROUP CORP

AI summary

A communication system for supporting carrier aggregation and a method and apparatus for updating system information thereof are disclosed. A method for providing system information in the communication system supporting carrier aggregation includes: when system information of said communication system changes, generating first information including information for indicating the change of system information; determining a first cell of a terminal related to the change of system information, wherein said first cell is one of cells to which said terminal connects, and corresponds to a carrier unit currently used by said terminal for keeping connection with a base station of said communication system; and transmitting said first information to said terminal through said first cell.