QoE Report Handover Continuity in Wireless Devices

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Solution Overview

Problem

Current wireless communication systems face challenges in ensuring complete Quality of Experience (QoE) reports during handover processes, as ongoing reports are often interrupted, leading to fragmented or useless data due to the high likelihood of handover occurring during transmission.

Innovation Solution

Implement a method where the user equipment (UE) restarts the transmission of QoE reports in the target cell after handover, ensuring all packet data convergence protocol (PDCP) service data units (SDUs) are delivered, and continues from the last unacknowledged protocol data units (PDUs), allowing for complete report delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If handover is performed during QoE report transmission, then mobility is enabled, but report completeness deteriorates

Engineering Contradiction:

Improvehandover speedVSAvoidQoE report completeness

Core Design Contradiction:

SpeedVSLoss of information

Solution Approach 1:

The network node stores the QoE report data before handover occurs. This preliminary storage ensures that even if transmission is interrupted during handover, the complete report is preserved and can be forwarded to the target cell, preventing information loss while maintaining mobility

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The source cell acts as an intermediary by temporarily storing the QoE report data during handover. This intermediary storage mechanism allows the report to survive the transition period, bridging the gap between source and target cells and ensuring complete delivery

Inventive Principle:

Principle #24Intermediary (Mediator)

2Duration of action of stationary object

If QoE report transmission continues during handover, then report continuity is maintained, but transmission reliability worsens

Engineering Contradiction:

Improvereport transmission durationVSAvoidtransmission reliability

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

The complete QoE report is stored in advance in the source cell before handover begins. This preliminary preparation eliminates the risk of transmission failure during handover, as the data is already secured and can be reliably forwarded to the target cell

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By storing the QoE report data beforehand in the source cell, a protective buffer is created against potential transmission failures during handover. This cushioning mechanism ensures that even if transmission is disrupted, the complete report remains available for reliable delivery

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS20240107386A1Handover during quality of experience reporting

Publication Date: 2024.03.28 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

According to some embodiments, a method performed by a wireless device comprises: starting transmission of a quality of experience (QoE) report in a first cell, the transmission comprising a plurality of data units; performing a handover to a second cell; determining that not all of the plurality of data units were transmitted to the first cell; and transmitting the QoE report to the second cell.