RRC Connection Resume Request for Wireless Terminal Latency Reduction

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Solution Overview

Problem

The existing RRC connection re-establishment procedure in wireless communication systems causes unnecessary latency and data loss due to the UE's inability to resume all suspended DRBs immediately after connection re-establishment, leading to inefficient radio bearer management.

Innovation Solution

A method and apparatus for a terminal to request a radio resource control (RRC) connection, involving the reception of a UE ID from a first cell, determination of its validity, and transmission of an RRC connection resume request message to a second cell if valid, allowing for the efficient resumption of all suspended radio bearers during re-establishment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE waits for a first RRC connection reconfiguration message to resume all suspended DRBs, then the RRC connection re-establishment is completed, but unnecessary latency and high possibility of data loss occur

Engineering Contradiction:

Improvedata loss preventionVSAvoidlatency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by enabling the UE to resume suspended DRBs immediately after RRC connection re-establishment, before receiving the first RRC connection reconfiguration message. The UE proactively resumes data radio bearers using stored configuration information, eliminating the waiting period and reducing latency while preventing data loss through early bearer resumption.

Inventive Principle:

Principle #10Preliminary action

2Stability of the object's composition

If the UE cannot resume all suspended DRBs immediately after RRC connection re-establishment, then the system maintains stability, but latency increases and data loss possibility rises

Engineering Contradiction:

Improvesystem stabilityVSAvoidlatency

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The system maintains stability by allowing the UE to resume suspended DRBs immediately after re-establishment using stored configuration information, while the network subsequently sends a reconfiguration message to confirm and finalize the bearer states. This preliminary resumption action reduces latency without compromising overall system stability through controlled validation.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the UE uses the existing RRC connection re-establishment procedure, then the connection is re-established, but radio bearer management efficiency deteriorates

Engineering Contradiction:

Improveconnection re-establishmentVSAvoidradio bearer management efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent improves radio bearer management efficiency by enabling the UE to proactively resume suspended DRBs immediately after RRC connection re-establishment using stored configuration information, rather than waiting for network instructions. This preliminary resumption action accelerates bearer recovery while maintaining connection reliability, significantly improving overall management efficiency.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11184938B2Method and device for requesting RRC connection

Publication Date: 2021.11.23 LG ELECTRONICS INC

AI summary

Provided are a method for a terminal requesting a radio resource control (RRC) connection in a wireless communication system, and a device supporting same. The method may comprise the steps of: receiving a UE ID from a first cell; determining whether the UE ID is valid; and transmitting an RRC connection resume request message including the UE ID to a second cell if the terminal determines that the UE ID is valid.