Hyun-Chul Kang

Multi agent 3D printer and robot system for mass personalization faas platform

Factory as a Service is a mass personalization service platform. The system consists of three platforms; portal cloud system, manufacturing execution platform and manufacturing operation platform including IoT based manufacturing instruments called micro smart factory. The smart factory include almost all the manufacturing process instruments; manufacturing instrument such as 3D printer, post-processing instruments, inspection instrument, transfer instrument, and packing instruments. The smart factory works in multi agent system based on IoT middleware. Each instrument transfers fundamental information of product part and operation command. This system has continued to be evolved to be autonomous control Micro Smart Factory including intelligent instruments.

Voice quality measurement system for telephone service

Recently, plenty of voice quality measuring devices of VoIP(Voice over Internet Protocol) service is developed to support high quality VoIP service for communication. However, the existing voice quality measuring devices select the unique measurement method, which uses PESQ(Perceptual Evaluation of Speech Quality) or R-factor only. However, the each voice quality measurement method differs from its usage and assumed range, which leads to the slightly different results at the same testing area for voice services. At the actual VoIP service business and related regulatory organizations, they request to use the above two types of algorithm at the same time for measuring voice quality. However, the development expenses are very high to use the above two types of algorithm at the same time for measuring voice quality due to additional resources and subsidiary devices. VoIP business and regulatory agencies also request the hardware specification of the voice quality measurement device is similar to that of VoIP service user terminal, considering VoIP service supply at the wireless mobile internet such as WiBro(Wireless Broadband). In this paper, we present the voice quality measurement method by using of the above two algorithms at the one physical measurement device at the same time for more accurate and reliable VoIP voice quality measurement. In addition, we introduce the development method of the voice quality measurement device with relatively low cost.

Performance control mechanism for customer network management

The customer network management (CNM) provides the end customer with a window to view their entire enterprise network. We have proposed a server-based performance control mechanism using CORBA and the Web technologies. This paper proposes customer network management system (CNMS) architecture, and performance management on ATM services.