RRC Inactive Data Transfer via Segmented Resume Procedure

Solution Overview

Problem

The existing 5G communication systems face challenges in efficiently transitioning from the RRC_INACTIVE state to the RRC_CONNECTED state for data transfer, leading to excessive overhead and reduced network efficiency.

Innovation Solution

A method and apparatus for data transfer in the RRC_INACTIVE state are introduced, which include receiving a RRCRelease message, determining a radio bearer configured for a second resume procedure, restoring its configuration, re-establishing the PDCP entity, resuming the radio bearer, and transmitting a RRCResumeRequest to the base station.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If full connection re-establishment is performed when transitioning from RRC_INACTIVE to RRC_CONNECTED, then connection reliability is improved, but overhead increases and network efficiency decreases

Engineering Contradiction:

Improveconnection reliabilityVSAvoidoverhead

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The resume procedure is segmented into two types: first resume procedure for full connection re-establishment and second resume procedure for data transfer only. This segmentation allows the system to choose the appropriate procedure based on needs, avoiding unnecessary overhead when full re-establishment is not required.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second resume procedure performs partial action by re-establishing only the PDCP entity and resuming only the radio bearer for data transfer, rather than performing full connection re-establishment. This partial action suffices for data transfer needs while reducing overhead.

Inventive Principle:

Principle #16Partial or excessive action

2Reliability

If full connection re-establishment is performed when transitioning from RRC_INACTIVE to RRC_CONNECTED, then connection reliability is improved, but network efficiency deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoidnetwork efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The resume procedure is segmented into two types: first resume procedure for full connection re-establishment and second resume procedure for data transfer only. This segmentation allows the system to choose the appropriate procedure based on needs, avoiding unnecessary overhead when full re-establishment is not required.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second resume procedure performs partial action by re-establishing only the PDCP entity and resuming only the radio bearer for data transfer, rather than performing full connection re-establishment. This partial action suffices for data transfer needs while reducing overhead.

Inventive Principle:

Principle #16Partial or excessive action

3Productivity

If second resume procedure is implemented for data transfer in RRC_INACTIVE state, then overhead is reduced and network efficiency is improved, but procedure complexity increases

Engineering Contradiction:

Improvenetwork efficiencyVSAvoidprocedure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The resume procedure is segmented into two types: first resume procedure for full connection re-establishment and second resume procedure for data transfer only. This segmentation allows the system to choose the appropriate procedure based on needs, avoiding unnecessary overhead when full re-establishment is not required.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radio bearer configuration is stored in the UE Inactive AS context before entering RRC_INACTIVE state. This preliminary action allows the configuration to be restored quickly during the second resume procedure without requiring complex re-configuration operations.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250133625A1Method and apparatus for resume procedure for data transfer in RRC_inactive state in mobile wireless communication system

Publication Date: 2025.04.24 BLACKPIN INC

AI summary

A method and apparatus for data transfer in RRC_INACTIVE state is provided. Method for data transfer in RRC_INACTIVE state includes receiving a RRCRelease, determining a radio bearer configured for second resume procedure based on the first information for second resume procedure, receiving from the base station a system information, initiating second resume procedure, restoring configuration of the radio bearer configured for second resume procedure stored in UE Inactive AS context, re-establishing PDCP entity of the radio bearer configured for second resume procedure, resuming the radio bearer configured for second resume procedure and transmitting to the base station a RRCResumeRequest.