QoE Measurement Continuity During Inter-System Handovers
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Solution Overview
Problem
Current mobile communication technologies do not support the continuity of Quality of Experience (QoE) measurements during inter-system handovers between different radio access technologies (RATs) such as 5G and LTE, due to the lack of an existing interface for transferring QoE measurement configurations.
Innovation Solution
The proposed solution involves receiving QoE area scope information and QoE configuration information by a target node from a source node through a core network, and determining the continuity of QoE measurements based on this information, ensuring that QoE measurements can be seamlessly continued across different networks during handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If QoE measurement configuration is not transferred during inter-system handover, then device complexity is reduced, but measurement precision is lost due to discontinuity of QoE measurements
Solution Approach 1:
The core network acts as an intermediary to transfer QoE measurement configuration information from the source network to the target network during inter-system handover. This mediator approach enables continuous QoE measurements across different radio access technologies without requiring direct interface between source and target networks, thus maintaining measurement precision while managing complexity through the existing core network infrastructure.
Solution Approach 2:
The QoE measurement configuration information is transferred in advance during the handover preparation phase, before the actual handover execution. This preliminary action ensures that the target network is ready to continue QoE measurements immediately upon handover completion, maintaining measurement continuity without adding complexity to the real-time handover process.
2Reliability
If QoE configuration information is transferred through core network during handover, then QoE measurement continuity is improved, but information loss occurs due to potential configuration incompatibility between different RATs
Solution Approach 1:
The patent adapts QoE measurement configuration parameters to be compatible with the target radio access technology while preserving the essential measurement objectives. Configuration parameters are transformed and re-mapped according to the capabilities and requirements of the target RAT, ensuring that QoE measurements can continue reliably without losing critical measurement information during inter-system handover.
3Ease of operation
If QoE measurements are continuously monitored during handover, then user experience is improved, but energy consumption increases due to additional processing
Solution Approach 1:
QoE measurements are performed periodically at defined intervals rather than continuously during handover. This periodic measurement approach maintains adequate user experience monitoring while significantly reducing the processing load and energy consumption compared to continuous measurement, especially during the transient handover period when network conditions are changing.
Data Source
AI summary
The end-to-end experience of a wireless customer depends on at least data throughput, data loss, and latency, as well as other characteristics. The user's quality of experience (QoE) can be determined based on applications and measurements taken at the application layer of the user's user equipment (UE) and information at the session level at the UE initiated and configured by an operator at the start of the session. The QoE is an application layer measurement configured by the operator and reported inside the application layer. When a UE is performing an inter-system handover, the QoE measurement configuration of the current session cannot be transferred from the source network to the target network.