Core Network QoE Retrieval for RRC Idle Reconnection

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Solution Overview

Problem

Existing wireless communication systems face challenges in managing Quality of Experience (QoE) configurations when user equipment (UE) transitions to a Radio Resource Control Idle (RRC_IDLE) state, as current mechanisms do not support QoE measurements in this state, particularly for new service types like multicast and broadcast services.

Innovation Solution

A core network (CN) stores QoE-related information, including configurations and identifiers, for UE in RRC_IDLE, and retrieves and re-sends these configurations when the UE reconnects, using enhanced Next Generation Application Protocol (NGAP) messages to manage QoE configurations and releases.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the core network stores and retrieves QoE configurations for UE in RRC_IDLE state, then QoE measurements can be performed in idle state supporting new service types, but the network complexity and signaling overhead increase

Engineering Contradiction:

ImproveQoE measurement capability in RRC_IDLE stateVSAvoidnetwork complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The core network stores QoE configurations in advance before the UE enters RRC_IDLE state. When the UE transitions to idle state, the pre-stored configurations are readily available for retrieval, eliminating the need for complex real-time configuration generation and reducing network complexity during idle state operations

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system creates and stores copies of QoE configurations in the core network when the UE is in connected state. These configuration copies are then retrieved and reused when the UE enters idle state, avoiding repeated configuration transmissions and reducing signaling overhead while enabling QoE measurements in RRC_IDLE

Inventive Principle:

Principle #26Copying

2Reliability

If the core network retrieves and re-sends QoE configurations when UE reconnects, then seamless network reconnection is ensured, but signaling overhead and network traffic increase

Engineering Contradiction:

Improvenetwork reconnection reliabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent extracts and stores only the essential QoE configuration parameters in the core network when the UE is in connected state. When the UE reconnects, only these extracted configuration elements need to be re-sent, rather than transmitting complete configuration sets, thereby reducing signaling overhead while ensuring reliable reconnection

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

QoE configurations are prepared and stored in advance in the core network before the UE disconnects. This preliminary preparation ensures that when the UE reconnects, the configurations are immediately available for retrieval and re-sending, ensuring seamless reconnection while minimizing the actual signaling required at reconnection time

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250365807A1Systems and methods for core network based idle quality of experience configuration retrieve

Publication Date: 2025.11.27 ZTE CORP

AI summary

Presented are systems and methods for core network (CN) based IDLE Quality of Experience (QoE) configuration retrieve. A wireless communication entity may store Quality of Experience (QoE)-related information, in response to or prior to a wireless communication device switching to a Radio Resource Control Idle (RRC_IDLE) state.