A Generative Approach for Production-Aware Industrial Network Traffic Modeling

TL;DR

This paper presents a novel production-aware traffic modeling approach for industrial networks using generative models, enabling realistic traffic simulation conditioned on production states, which is crucial for optimizing 5G industrial connectivity.

Contribution

It introduces a two-step stochastic process combining semi-Markov modeling of production states with generative models for traffic, improving traffic simulation accuracy in industrial environments.

Findings

CVAE achieves the lowest Kullback-Leibler divergence among tested models.

The model accurately captures traffic statistics conditioned on production states.

Generative models effectively replicate real traffic patterns for industrial network planning.

Abstract

The new wave of digitization induced by Industry 4.0 calls for ubiquitous and reliable connectivity to perform and automate industrial operations. 5G networks can afford the extreme requirements of heterogeneous vertical applications, but the lack of real data and realistic traffic statistics poses many challenges for the optimization and configuration of the network for industrial environments. In this paper, we investigate the network traffic data generated from a laser cutting machine deployed in a Trumpf factory in Germany. We analyze the traffic statistics, capture the dependencies between the internal states of the machine, and model the network traffic as a production state dependent stochastic process. The two-step model is proposed as follows: first, we model the production process as a multi-state semi-Markov process, then we learn the conditional distributions of the production state dependent packet interarrival time and packet size with generative models. We compare the performance of various generative models including variational autoencoder (VAE), conditional variational autoencoder (CVAE), and generative adversarial network (GAN). The numerical results show a good approximation of the traffic arrival statistics depending on the production state. Among all generative models, CVAE provides in general the best performance in terms of the smallest Kullback-Leibler divergence.