• Journal of Broadcast Engineering
• /
• v.26 no.4
• /
• pp.377-389
• /
• 2021

This paper presents a framework design of a digital twin system for a vertical smart farm. In this paper, a framework of digital twin systems establishes three factors: 1) Client 2) IoT gateway, and 3) Server. Especially, IoT gateway was developed using the Eclipse Ditto, which has been commonly used as the standard open hardware platform for digital twin. In particular, each factor is communicating with the client, IoT gateway, and server by defining the message sequence such as initialization and data transmission. In this paper, we describe the digital twin technology trend and major platform. The proposed design has been tested in a testbed of the lab-scale vertical smart-farm. The sensor data is received from 1 Jan to 31 Dec 2020. In this paper, a prototype digital twin system that collects environment and control data through a raspberry pi in a plant factory and visualizes it in a virtual environment was developed.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2016.01a
• /
• pp.85-86
• /
• 2016

본 논문에서는 IoT 환경에서 IoT 게이트웨이를 통해 제공되고 있는 서비스 탐색 프로토콜에 대한 문제점을 분석하고 이를 해결하기 위한 해결방법에 대한 방향을 제시한다. 현재 다양한 IoT 서비스 탐색 프로토콜이 제안되어 있으며 제안된 서비스 탐색 프로토콜은 IP 기반 프로토콜과 non-IP 기반 프로토콜로 구분된다. 최근 IoT 기반 홈 네트워크 서비스 제공을 위해 스마트 IoT 게이트웨이가 개발되었다. 제안된 IoT 게이트웨이는 이종 네트워크 인터페이스에 대한 프로토콜 컨버팅 기능은 제공하고 있으나 서비스 탐색에 대한 홍보기능을 제공하고 있지 않다. 따라서 상이한 인터페이스로 구성된 IoT 디바이스에 대한 서비스 탐색 기능을 제공하지 못한다. 본 논문에서는 이런 문제점을 정의하고 이를 해결하기 위한 IoT 게이트웨이 내부 기능을 정의하고 추가적으로 공통 IoT 서비스 탐색 프로토콜 개발에 대한 방향을 제시한다.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.21 no.6
• /
• pp.1121-1126
• /
• 2017

Recently, the importance of smart gateways that link these with the big data and the development of the Internet of things is getting bigger. The smart gateway includes a network function such as a router and a router, and a sensor network function that links various objects such as a sensor. As the internet market has expanded, network stability and security problems have arisen and VPN technology has been proposed as one of the ways to solve these security problems. Efficient design is needed to implement VPN in low-end smart gateway and SOHO-level Internet environment with poor line quality. In this paper, we propose the concept and principle of VPN tunneling implementation and real - time traffic shaping method according to internet line condition in the Smart Gateway that supports IOT developed based on OpenWRT, the implementation and measured performance indicators are presented.

• Journal of the Korea Society of Computer and Information
• /
• v.17 no.3
• /
• pp.33-40
• /
• 2012

Recently, to enhance the quality and efficiency of health care services, smart health care services utilizing a smart phone and tablet pc are mainly being introduced into the large hospital and the interest for personal health record service which manages personal medical information utilizing PC and smart phone and technology development is actively underway. In order to build a next generation hospital information systems, the interoperability of data between the different hospital information systems and UX consistency between the various user devices must be assured. Therefore, in this paper, medical information standard and the study for improving the performance is conducted to design the gateway system which converting and integrating the medical information under multi-platform environment. In this paper, CCR standard is adapted to the mapping method between the data which is the key feature of the gateway system and design the system utilizing multi-table-based mapping method. To evaluate the performance of the system, experiment was done and the result has been improved approximately 20 percent for response rate.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.23 no.2
• /
• pp.173-178
• /
• 2019

Recently, the types and amount of data generated, collected, and measured in IoT such as smart home, security, and factory are increasing. The technologies for IoT service include sensor devices to measure desired data, embedded software to control the devices such as signal processing, wireless network protocol to transmit and receive the measured data, and big data and AI-based analysis. In this paper, we focused on developing a gateway for interfacing heterogeneous sensor network protocols that are used in various IoT devices and propose a heterogeneous network interface IoT gateway. We utilized a OpenWrt-based wireless routers and used 6LoWAN stack for IP-based communication via BLE and IEEE 802.15.4 adapters. We developed a software to convert Z-Wave and LoRa packets into IP packet using our Python-based middleware. We expect the IoT gateway to be used as an effective device for collecting IoT big data.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.42 no.4
• /
• pp.879-888
• /
• 2017

Recently, the Smart household appliances to provide Smart services have been actively spreaded by providing IoT(Internet of Things). Also, the appliances which Wi-Fi and Bluetooth can directly control are preferred. But until now, the most household appliances are based on IR(InfraRed) and the each procotols of them are different. In this paper, to solve these problems, we suggested the system to control both smart appliances and general appliances by using Smart phone. The system is "Wi-Fi to IR" gateway which receives the Wi-Fi signal to convert to IR signal and transmit it. Also, we made the remote control function in specific brands' appliances possible to most brands without limitation and tried to control not only one remote controller for one TV brand but also for all brand without limitation.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.16 no.9
• /
• pp.1970-1976
• /
• 2012

Home healthcare system has lot of things to do for the integration with medical instruments in the sense of standardization. We will design and implement mobile healthcare system based on smart gateway thru adaptation of ISO/IEEE 11073, and HL7 standard. And also we are willing to research heart rate monitor, pulse-oxygen meter and ECG monitor in order to develop mobile healthcare system for medical appliance. We studied the connection of standard medical devices, i.e, continua health alliance under the Android 4.x Bluetooth HDP(Health Device Profile) environments. We also tried to implement healthcare system which can support diagnosis for healthcare provider and user based on HL7 standard.

• TTA Journal
• /
• s.167
• /
• pp.124-127
• /
• 2016

Smart Connectivity를 위한 IoT, 네트워킹, 보안 솔루션을 제공하는 (주)브로드웨이브는 자사만의 경쟁력을 통해 벤처기업 인증, 이노비즈기업 인증, 기업부설연구소 설립 등 내실있는 기업으로 발돋움하고 있다. 특히, 개방과 공유로써 성공적인 IoT 비즈니스를 만들기 위해 국제 표준 기반의 개방형 IoT 서비스 개발에 주력하고 있다. 이의 일환으로, 사용하지 않는 중고 스마트폰을 활용하여 IoT 표준화를 통해 다른 스마트폰이나 PC, 노트북 간의 게이트웨이로서 기능케 하는 기술을 개발 중이다. 이를 위해서는 많은 전문가로부터 다양한 관점을 전달받는 것이 중요했고, 고민 끝에 TIA의 중소 중견기업을 위한 표준 자문서비스의 도움을 청하게 되었다.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.11 no.11
• /
• pp.1107-1112
• /
• 2016

This study is the Smart Office features that take advantage of KEPCO eIoT(: energy Internet of Thing) platform, and it's Network configuration is composed of sensing device, gateway, platform, and the service server. The key features are parts for processing protocol data between the gateway and the device using LoRa(: Long Range) technology, Intelligent applications and public safety data connected to the PS-LTE(: Public Safety-Long-Term Evolution) system. And the resource tree provided Smart Office for the service, which commonly used in the application server and the device.

• Journal of the Korea Convergence Society
• /
• v.8 no.9
• /
• pp.25-30
• /
• 2017

The Connected House is a new type of IT convergence service that combines new communication services with existing IT systems such as M2M, NFC, smart home, and smart grid. It is a future connected life service that connects to any device anytime, anywhere. In this paper, we designed an intelligent gateway, a connected office solution for the Internet of things, which provides a connected life service for the future, and can control various sensors, ZigBee/Z-Wave/NFC and terminal devices. In addition, IP/SIP/IMS cameras and video door phones that are linked to the gateway have been developed to satisfy the quality standards of domestic communication service providers in terms of voice quality, jitter, and frame rate.