RRC State Change Messaging for Multi-Node Connectivity

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Solution Overview

Problem

Current techniques for handling resource control state changes and multi-node connectivity in 5G wireless communication involve inefficient execution of multiple RRC procedures, leading to communication delays and resource wastage, with potential failures during asynchronous communication.

Innovation Solution

A combined RRC procedure that integrates resource control state change and multi-node connectivity information into a single message, reducing the need for sequential RRC procedures and minimizing communication delays and resource waste.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple RRC procedures are executed sequentially to change resource control state and establish multi-node connectivity, then the UE can establish reliable connections, but communication delays increase and power consumption increases

Engineering Contradiction:

Improveconnection reliabilityVSAvoidcommunication delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines multiple separate RRC procedures (RRC connection resume procedure and RRC reconfiguration procedure) into a single integrated RRC procedure. The master node sends a single RRC message that simultaneously conveys both state change information and multi-node connectivity configuration information, allowing the UE to transition to the inactive state and establish multi-node connectivity in one operation rather than sequentially, thereby reducing communication delay while maintaining connection reliability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The RRC message is designed to serve multiple functions simultaneously: it acts as both a state transition command (directing UE to inactive state) and a connectivity configuration message (establishing multi-node connectivity with secondary node). This multi-functional approach eliminates the need for separate specialized procedures, reducing overall procedure time while ensuring both state management and connectivity establishment are handled reliably

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple RRC procedures are executed sequentially, then comprehensive connection control is achieved, but power consumption increases due to multiple transmissions

Engineering Contradiction:

Improveconnection controlVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

By merging the state change command and connectivity configuration into a single RRC message transmission, the number of uplink and downlink transmissions is reduced. The UE performs only one reception and one acknowledgment instead of multiple sequential transmissions, directly reducing power consumption while maintaining comprehensive connection control through the integrated message

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If sequential RRC procedures are used, then state change and connectivity establishment are handled separately, but the likelihood of failures increases due to asynchronous communication

Engineering Contradiction:

Improveprocedure separationVSAvoidfailure likelihood

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent merges state change information and connectivity configuration information into a single synchronized RRC message exchange. This ensures that the UE receives both instructions atomically - either both are applied together or neither is applied, eliminating the window of vulnerability where partial configuration could lead to failures. The asynchronous communication issues are resolved by making the entire operation synchronous and atomic

Inventive Principle:

Principle #5Merging (Combining)

4Ease of manufacture

If separate RRC procedures are executed, then each procedure can be optimized independently, but overall procedure complexity increases

Engineering Contradiction:

Improveprocedure optimizationVSAvoidprocedure complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent combines what would otherwise be two separate optimized procedures into one integrated procedure with a unified message structure. While this reduces the number of procedural steps and overall complexity, the message itself is designed to carry multiple types of information in a structured format that can still be processed and optimized independently through standard RRC message handling mechanisms

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP3744150B1Efficient handling of a resource control state change and multi-node connectivity

Publication Date: 2026.04.15 GOOGLE LLC

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AI summary

This document describes techniques and devices for efficient handling of a resource control state change and multi-node connectivity. Instead of performing multiple radio resource control (RRC) procedures to change a resource control state of a user equipment (UE) (110) and establish, modify, or release a connection with multi-node connectivity, the techniques described herein combine the multiple RRC procedures into a single RRC procedure that supports both a resource control state change and multi-node connectivity. In particular, a master node (302) sends a resource control state and multi-node connectivity message (326) that includes both state change information (340) and multi-node connectivity information (350). With this single message, timing and power resources of the UE (110) can be conserved and failures resulting from asynchronous communication of the state change information (340) and the multi-node connectivity information (350) can be avoided.