Configured Grant State Reporting via MAC CE for Reliable RAN Control

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Solution Overview

Problem

Inconsistent understanding of configured grant (CG) states between terminal devices and network devices in radio access networks leads to transmission or reception errors due to multiple physical downlink control channels (PDCCHs) indicating the same CG state, which is not accurately reflected in the current multiple entry configured grant confirmation MAC CE.

Innovation Solution

Implementing a media access control-control element (MAC CE) that clearly indicates the state of each CG, using indication bits to align the understanding between the terminal device and the network device, ensuring consistent activation or deactivation states are reported.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple PDCCHs are used to indicate activation or deactivation of CG, then the network device can flexibly control CG states, but inconsistent understanding of CG states occurs between terminal device and network device

Engineering Contradiction:

Improveflexibility of CG state controlVSAvoidconsistency of CG state understanding

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The terminal device sends feedback information to the network device to report the received PDCCH state. This feedback mechanism ensures that the network device can accurately understand which CG states have been activated or deactivated, resolving the inconsistency between network device intentions and terminal device actual states.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The feedback information acts as an intermediary that bridges the gap between the network device's CG state control intentions and the terminal device's actual CG states. This intermediary information ensures accurate understanding and consistent state management.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If multiple entry configured grant confirmation MAC CE is used, then the terminal device can report multiple CG states, but the MAC CE does not accurately reflect the actual CG states

Engineering Contradiction:

Improvenumber of reported CG statesVSAvoidaccuracy of CG state reflection

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The patent changes the parameter representation in the MAC CE by introducing a specific indication bit for each CG. Each indication bit directly corresponds to a specific CG state (activated or deactivated), ensuring that the MAC CE accurately reflects the actual CG states rather than using ambiguous multi-entry configurations.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If indication bits are added to MAC CE to accurately indicate CG states, then the accuracy of state reporting is improved, but the complexity of the MAC CE structure increases

Engineering Contradiction:

Improveaccuracy of CG state indicationVSAvoidMAC CE structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The MAC CE structure is segmented into individual indication bits, where each bit independently indicates the state of a specific CG. This segmentation approach maintains simplicity by using basic binary indicators rather than complex multi-entry structures, while still achieving accurate state representation.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12389416B2Method for information reporting, terminal device, and network device

Publication Date: 2025.08.12 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A method for information reporting, a terminal device, and a network device are provided. The method includes the following. A terminal device reports a media access control-control element (MAC CE) to a network device, where the MAC CE indicates a state of a configured grant (CG) configured by the network device for the terminal device.