• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.12a
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• pp.494-497
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• 2003

본 논문에서는 Security 보안 게이트웨이를 이용하여 VPN 기반 보안 터널링을 생성하여 기존의 단말의 안전한 데이터 전송을 보장하고 Rogue AP에 의한 사용자의 정보 누출가능성을 최소화 할 수 있는 보안 게이트웨이를 구현하였다 무선랜 방식은 기존의 유선랜에 비해 사용하기 편리하다는 장점이 있지만 수신 장비만 있으면 누구나 데이터를 수신할 수 있는것처럼 보안에 취약한 단점이 있다. 기존의 무선랜 보안 모델은 802.1X 와 RADIUS 서버를 이용하여 장비 업체별 상이한 솔루션으로 호환이 불가능하고 Rogue AP에 의한 위협이 있다. 본 논문에서 구현한 보안 게이트웨이는 2계층과 3계층에 보안 모델을 도입하여 데이터 전송을 안전하게 할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.211-214
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• 2014

센서네트워크에서 가장 큰 화두 중의 하나는 무선 배터리를 사용하는 전력소모문제이다. 배터리 전력소모문제를 해결하기위해 많은 노력을 하고 있다. 본 논문은 Polling 방법보다 배터리 전력소모가 적은 인터럽트 기반의 방법을 선택하여 구현하고, 구현한 알고리즘을 소개한다. 본 논문에서는 소개한 알고리즘은 Sleep상태의 게이트웨이가 데이터를 송수신할 때만 Awake상태로 바뀌어서 배터리 전력소모를 줄이고, 인터럽트 루틴을 통하여 센서노드와 게이트웨이, 게이트웨이와 서버간의 양방향 통신을 제공한다.

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.4
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• pp.350-358
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• 2001

최근 이동 무선통신 환경에 대하여 점차 관심이 집중되고 있다. 이동 무선통신 환경을 구축하기 위하여 WAP(Wirelsee Appkication Protocol) 및 WAP 게이트웨이(Gateway)등이 제안되었는데, WAP 게이트웨이는 이동 무선통신 환경에서도 기존의 유선 네트워크를 함께 이용할 수 있도록 하였다. 그런데 이런 시도는 새로이 WML(Wireless Markup Language)로 구축된 웹사이트들에게만 적용될 뿐이며, HTML로 구축된 기존의 많은 웹사이트들을 지원할 수 없다. 본 논문에서는 새로운 WML 웹사이트들뿐만 아니라, 기존의 HTML 웹사이트들의 내용도 이동 무선통신 환경에서 사용될 수 있도록 하기 위하여, HTMl 필트 기능을 갖춘 WAP 게이트웨이 시스템을 설계하고 구현하였다. 이 시스템은 WAP 서버, 웹 클라이언트, 프로토콜 변환기, WML 인코더/디코도, HTML 필터 등으로 구성되어 있다. 이동 무선단말기 에뮬레이터를 사용한 실험에서 이 시스템을 사용한 결과, WML 및 HTML 웹사이트들에 대해서 수동적인 변환 없이도 이동 무선단말기에서 검색이 가능하였다.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.235-241
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• 2019

The structure of the IoT can be divided into devices, gateways, and servers. First, the gateway collects data from the device, and the gateway sends data to the server through HTTP protocol, Websocket protocol, and MQTT protocol. The processing server then processes, analyzes, and transforms the data, and the database makes it easy to store and use this data. These IoT services are basically centralized structures with servers, so attacks on the entire platform are concentrated only on the central server, which makes hacking more successful than distributed structures. One way to solve this problem is to develop IoT that combines blockchain. Therefore, the proposed research suggests that the blockchain is a distributed structure, in which blocks containing small data are connected in a chain form, so that each node agrees and verifies the data with each other, thereby increasing reliability and lowering the probability of data forgery.

• Journal of the Institute of Electronics and Information Engineers
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• v.49 no.9
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• pp.379-385
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• 2012

This paper suggests U-healthcare system for individual health management realizing the gateway, client, and Java-based network server by using the vital signal measuring system and android-based mobile platform. This study realized the vital signal measuring system based on the technology to measure the ECG, oxygen saturation, blood pressure, and respiration, etc. And all the information of measurement was transmitted to the mobile gateway using the 3-bite transmission protocol consisting of headers and data. The data transmitted to the mobile gateway was used to examine the mobile client's personal health indexes through the network server. This paper realized and tested the android-based gateway, client, and the broadcasting network server and verified their validity with simulations and actual humans. As a result, the U-healthcare system suggested was proved to be effective in managing each individual's health from short distance and long distance. And it could examine each individual's health conditions in real-time and was found to be advantageous in that it could secure the guardian's mobility.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.11
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• pp.2119-2124
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• 2016

The Internet of things (IoT) needs to be an event-driven approach for efficient related time response and processing. The growth of mobile devices in Internet of Things (IoT) leads to a number of intelligent buildings related IoT applications. For instance, home automation controlling system uses client system such web apps on smartphone or web service to access the home server by sending control commands. The gateway based RESTful technology responsible for handling clients'requests attests an internet latency in case a large number of clients' requests submit toward the gateway increases. In this paper, we propose the design tasks of the IoT gateway for handling concurrency events. The gateway based event-driven architecture is designed for building IoT gateway using node.js on one side and communication protocol based message-oriented middleware known as XMPP to handle communications of intelligent building control devices connected to the gateway through a centralized hub.

• 전자공학회논문지 IE
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• v.46 no.3
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• pp.55-61
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• 2009

This paper describes an assistant system for elders who live alone. The developed system is composed of a wearable RFID system, a gateway system, and server system. The wearable RFID system is installed in glove. The wearable RFID system can be considered as a wireless sensor network which has a sink node and sensor node with a RFID reader. The sensor node can read RFID tags on the various objects used in daily living such as furniture, medicines, sugar and salt bottles, and ok. The sensor node transmits wireless packets to the sink node. The sink node sends the received packet immediately to a server system via a gateway system. The gateway provides users with audio-visual information of objects. The server system is composed of a database server and a web server. The data from each wearable RFID system is collected into a database, and then the data are processed to visualize the measurement of daily living activities of users. The processed data can be provided for someone who wants to know about user's daily living patterns in house such as family, caregivers, and medical crew.

• Convergence Security Journal
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• v.2 no.2
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• pp.189-198
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• 2002

In this paper, we have designed the Web_based Home Gateway Management System using SSL, which can manage subscribers using Home Gateway device in home networking technology. To manage Home Gateway devices with SNMP, management elements are classified into system. performance. fault functional area based on MIB objects from Home Gateway devices MIB. System analysis provides configuration information of each Home Gateway, and Performance analysis provides device's traffic information and state. And fault analysis provides fault logging for the unexpected events and trap message from devices. HGMS uses SSL (Secure Socket Layer) to enforce the security of communication which is between server and client, and it improved the stability of HGMS.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.6B
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• pp.355-368
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• 2005

The need for a unified data communication for home digital devices and realtime multimedia services in home network has led to recent research on home gateway over the broadcasting and communication convergence network. In this paper, we discuss requirement for such home gateway design and define services that the home gateway provides. Then, we propose a home gateway architecture aimed to efficient multimedia distribution for heterogeneous devices in the home network. The proposed home gateway has a role of protocol gateway, media server, and media trans-coder. Finally, we show the feasibility of the proposed home gateway in several multimedia distribution scenario.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.1
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• pp.47-52
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• 2017

This study is BIT(: Bus Information Terminal) features that take advantage of KEPCO eIoT(: energy Internet of Thing) platform, and it's Network configuration is composed of display terminal 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 SIP(: Session Initiation Protocol) data handling connected to the Taxi reservation system. And the resource tree provided BIT for the service, which commonly used in the application server and the device.