RRC Message Processing for Secondary Cell Group Power Management

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Solution Overview

Problem

Current radio communication systems using Multi Radio Dual Connectivity (MR-DC) face inefficiencies in power management, particularly when transitioning between active and inactive states of the secondary cell group, leading to unnecessary power consumption due to incorrect handling of reconfiguration messages.

Innovation Solution

The system introduces a controller in the terminal device to process Radio Resource Control (RRC) messages, allowing for controlled activation and deactivation of the secondary cell group based on specific parameters, thereby optimizing power usage by delaying or skipping unnecessary reconfigurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the terminal device continuously monitors and processes RRC messages to maintain readiness for data transmission, then communication responsiveness is improved, but power consumption increases

Engineering Contradiction:

Improvecommunication responsivenessVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The terminal device dynamically adjusts its operational state between active and inactive modes based on data communication conditions. When data communication is suspended or minimal, the device transitions to an inactive state with reduced monitoring of RRC messages. When data communication is active or expected, the device transitions to an active state with full monitoring capability, thus adapting its responsiveness to current needs while conserving power during low-activity periods

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameters of the terminal device based on the state of the second cell group. When the second cell group is deactivated, the terminal device modifies its RRC message processing behavior by skipping certain messages or delaying processing actions. This parameter change in message handling behavior directly reduces power consumption while maintaining communication responsiveness when needed

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the terminal device processes all RRC messages immediately upon receipt, then communication efficiency is improved, but unnecessary reactivations occur increasing power consumption

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidpower consumption due to unnecessary reactivations

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The terminal device performs preliminary checks on received RRC messages before full processing. When the second cell group is in a deactivated state, the device preliminarily identifies and skips RRC messages related to the suspended data communication, avoiding unnecessary processing actions that would trigger cell group reactivation. This preliminary filtering action prevents energy loss from unnecessary reactivations while maintaining communication efficiency for relevant messages

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system extracts and separates the processing of RRC messages based on the operational state of the second cell group. When deactivated, specific RRC messages related to suspended data communication are extracted from the normal processing flow and skipped or delayed. This extraction of unnecessary processing actions eliminates power consumption associated with reactivating the cell group while preserving efficient processing for messages that require attention

Inventive Principle:

Principle #2Taking out (Extraction)

3Use of energy by moving object

If the terminal device deactivates the second cell group to save power during low data traffic, then power consumption is reduced, but communication setup time increases when data transmission is needed

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication setup time

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The terminal device implements periodic assessment of data communication conditions to determine whether to activate or deactivate the second cell group. Rather than continuous monitoring, the device periodically checks data traffic patterns and communication requirements, making state transitions at appropriate intervals. This periodic action reduces power consumption compared to continuous monitoring while ensuring the cell group is activated in a timely manner when data transmission needs arise

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically transitions the second cell group between active and inactive states based on real-time assessment of data communication conditions. When data traffic is low or suspended, the cell group is deactivated to save power. When data transmission requirements are detected, the cell group is rapidly reactivated. This dynamic state management balances power consumption reduction with acceptable communication setup time, adapting to changing communication needs

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20240334530A1First radio communication device, second radio communication device, communication method, and communication program

Publication Date: 2024.10.03 1FINITY INC

AI summary

A second radio communication device includes, a receiver configured to receive a Radio Resource Control (RRC) message from a first radio communication device, and a controller configured to, when the RRC message includes a first parameter and a second parameter, control to perform processing according to the second parameter after performing processing of resuming a radio bearer in a suspended state.