Demo: ML-based Vision Classification in the Smart Brewing Factory Testbed
Authors: Sujin Kook, Sihun Baek, Hyelin Nam and Seong-Lyun Kim
This work is accepted to ICC demo 2022, yet published.
The main purpose of this paper is to introduce our implementation of 5G MEC on a factory, and make it as a part of 5G smart factory. We adopt the ML (Machine Learning) based vision classification, and implement it using 5G connectivity and MEC. In particular, our focus is how to deploy the so called split and federated learning ,  on a real system to
We utilized the ML based vision classification to a brewing factory for the first time to the best of our knowledge. Until now, due to fast production line speed, and stability, the brewing factory was difficult to be fully automated. Our target system is to classify recyclable bottles to detailed brands.
Breweries in Korea reuse recycled glass bottles to make new products. Therefore, empty bottles arrive in the factory, and these should be classified into usable/useless, and in more detail, into 8 different brands.
To satisfy fast moving process of factory, we split the systmen into two parts with different deep learning models.
- Edge device distinguishes whether the bottle is recyclable or not with a smaller model. This tasks require a real-time service, so it is proper to process in an edge device.
- Cloud server, which has big computation resources distinguishes detailed brands with a bigger model.
We used Split Learning to collaborativel train the distributed neural network models on edge devices and the server. A set of lower layers of neural network model are stored on the edge device, and the remaining upper layers of the model are stored on the centralized server.
By connecting a factory in Busan, 400 kilometers away, from our Yonsei University server in Seoul, we make a whole smart factory testbed. Commercial 5G has challenging to be used in factories due to limited uplink speed. So, we establish the network connecting which was constructed utilizing the KOrea Advanced Research Network (KOREN), a public institution-managed R&D testbed network infrastructure, for supporting the reliability of the communication.
 Y. Gao, M. Kim, S. Abuadbba, Y. Kim, C. Thapa, K. Kim, S. A. Camtepe, H. Kim, and S. Nepal, “End-to-end evaluation of federated learning and split learning for internet of things,” arXiv preprint arXiv:2003.13376, 2020
 C. Thapa, M. A. P. Chamikara, S. Camtepe, and L. Sun, “Splitfed: When federated learning meets split learning,” arXiv preprint arXiv:2004.12088, 2020.