V2N QoS Prediction Using Statistical Link Modeling

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Solution Overview

Problem

Current mobile communication technologies are inadequate for predicting the quality of service (QoS) in dynamically changing vehicle-to-network (V2N) communication links, particularly in safety-critical applications like autonomous driving, where reactive systems limit performance and cannot adapt to dynamic vehicular traffic.

Innovation Solution

A method involving data gathering, data modeling, and QoS prediction, where instantaneous link characteristics are measured and recorded, and statistical distributions are modeled to predict future QoS parameters like data rate, latency, and loss rate, using empirical cumulative distribution functions or kernel density estimations, with the ability to refine models for accuracy and processing efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If reactive systems are used to respond to QoS changes, then the system can maintain stability, but the application performance is limited to lower-bound performance and cannot adapt to dynamic conditions

Engineering Contradiction:
ImproveQoS prediction accuracyVSAvoidAdaptation time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by predicting future QoS parameters before they actually occur. The system uses machine learning models to forecast data rate, latency, and loss rate for upcoming time intervals, enabling applications to proactively adapt their behavior in advance rather than reacting after QoS degradation occurs. This resolves the contradiction by providing both accurate prediction (improving reliability) and early warning (reducing adaptation time loss).

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by using dynamic QoS prediction that adapts to changing vehicular conditions. The system continuously updates predictions based on current vehicle position, speed, and network conditions, allowing the QoS parameters to dynamically adjust rather than relying on static reactive thresholds. This enables the system to maintain reliability while reducing the time needed to adapt to new conditions.

Inventive Principle:
Principle #15Dynamics

2Measurement precision

If statistical distribution modeling is used to predict QoS, then prediction accuracy improves, but computational complexity increases

Engineering Contradiction:
ImproveQoS parameter prediction precisionVSAvoidModeling and processing complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the QoS prediction into separate independent models for each parameter (data rate, latency, loss rate) and potentially for different time intervals or vehicular conditions. This allows the system to achieve high prediction precision for each specific parameter while managing overall computational complexity through modular processing. Each segmented model can be optimized independently, reducing the burden of computing all parameters simultaneously.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent uses parameter changes by selecting and modeling only the most critical QoS parameters (data rate, latency, loss rate) rather than attempting to predict all possible network parameters. The system changes the level of detail in predictions based on application requirements, using full statistical distribution when high precision is needed and potentially simplified metrics when computational resources are constrained. This balances measurement precision with device complexity.

Inventive Principle:
Principle #35Parameter changes

3Adaptability or versatility

If QoS prediction is implemented for V2N communication, then applications can adapt to dynamic conditions, but the system complexity increases compared to static base station scenarios

Engineering Contradiction:
ImproveApplication adaptability to QoS changesVSAvoidPrediction system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a QoS prediction system that serves multiple vehicular applications simultaneously through a unified prediction framework. The same prediction infrastructure supports different applications (autonomous driving, platooning, tele-operated driving) with their diverse QoS requirements, rather than requiring separate prediction systems for each application. This reduces overall system complexity while maintaining high adaptability, as the universal system can be configured to provide appropriate prediction accuracy and time intervals for each application type.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent uses an intermediary approach by introducing a dedicated QoS prediction server or network entity that acts as a mediator between the vehicular applications and the complex network conditions. This intermediary handles the computationally intensive statistical modeling and machine learning operations, providing simplified prediction results to applications. This reduces the complexity burden on individual vehicles while enabling sophisticated QoS prediction capabilities across the V2N communication system.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP3742767B1Method for predicting a quality of service for a communication between at least two communication partners, one of which may be a moving vehicle; apparatus for performing the steps of the method and computer program
Publication Date: 2022.08.24 VOLKSWAGEN AG
  • EP3742767B1 patent drawingFigure 1
  • EP3742767B1 patent drawingFigure 2
  • EP3742767B1 patent drawingFigure 3~4

AI summary

The proposal corresponds to a method for predicting a quality of service, hereinafter abbreviated QoS, for a communication over a communication link (Uu), where at least one communication partner is moving. This might be a vehicle (10) moving on a road. The proposal comprises a step of data gathering in which a plurality of momentary link characteristics will be measured and recorded in a database along with the position and time information for the moving communication partner (10) and a step of data modelling in which the statistical distribution of a given target QoS is modelled. The proposal is further characterized by a further step of predicting a target QoS. The proposal further concerns an apparatus for performing the steps of said method and a corresponding computer program.