Wireless Terminal SCG Activation Signaling for Energy-Aware RRC Resume

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Solution Overview

Problem

Existing communication systems face challenges in managing the state of a Secondary Cell Group (SCG) during the Radio Resource Control (RRC) connection resume process of a terminal device in an inactive state, leading to inefficient energy consumption and unnecessary activation.

Innovation Solution

A method where a terminal device transmits information indicating its expectation to activate an SCG in the RRC connection resume process, allowing the terminal device and network device to coordinate and accurately determine whether to activate the SCG, thereby avoiding unnecessary activation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the SCG is activated during RRC connection resume process, then data transmission capability is improved, but energy consumption increases

Engineering Contradiction:

Improvedata transmission capabilityVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent changes the state parameter of the SCG from always active to conditionally active based on the resume cause. By modifying the activation condition parameter (from unconditional to conditional based on uplink data indication), the system achieves both energy saving and maintained data transmission capability when needed.

Inventive Principle:

Principle #35Parameter changes

2Speed

If the SCG is activated during RRC connection resume process, then communication readiness is improved, but unnecessary activation occurs leading to wasted energy

Engineering Contradiction:

Improvecommunication readinessVSAvoidwasted energy

Core Design Contradiction:

SpeedVSLoss of energy

Solution Approach 1:

The terminal device provides feedback information to the network device indicating the resume cause (whether uplink data triggers the resume). The network device uses this feedback to make an informed decision on SCG activation, avoiding unnecessary activation when uplink data is not the resume cause, thus preventing wasted energy while maintaining communication readiness when needed.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If the terminal device indicates SCG activation expectation, then activation accuracy is improved, but signaling overhead increases

Engineering Contradiction:

Improveactivation accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential information needed for SCG activation decision (the resume cause indication) from the complete terminal state information. By transmitting only the relevant resume cause indicator rather than full terminal status, the system achieves accurate activation decisions while minimizing signaling overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12389488B2Method for wireless communication, terminal device, and network device

Publication Date: 2025.08.12 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A method for wireless communication, a terminal device, and a network device are provided. The method includes: transmitting, by a terminal device, first information to a network device, herein the first information indicates whether the terminal device expects to activate an SCG in an RRC connection resume process.