• The Journal of the Korea institute of electronic communication sciences
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• v.4 no.2
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• pp.162-167
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• 2009

In this paper, we present a patient real-time vital sign information transmission system to effectively support developing real-time communication service by using a real-time object model named TMO (Time-Triggered Message-Triggered Object). Also, we describes the application environment as the PMS(Patient Monitoing System) to guarantee real-time service message with TMO structure in distributed network systems. We have to design to obtain useful vital sign information, which is generated at parsing data receiver modulor of HIS with TMO structure, that is offered by the central monitor of PMS. Vital sign informations of central monitor is composed of the raw data of several bedsite patient monitors. We are willing to maintain vital sign information of real time and continuity that is generated from the bedsite patient monitor. In the real time simulation techniques based on TMO object modeling, we have observed several advantages to the TMO structuring scheme. TMO object modeling has a strong traceability between requirement specification and design.

• Journal of the Korea Society of Computer and Information
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• v.15 no.8
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• pp.89-98
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• 2010

Recently supply of Internet is bringing a important change in medical environments. The hospitals which had a different system is required the system that can efficiently share and exchange medical information. In order to transmission medical information between systems, the Health Level Seven(HL7) interface engine development that can convert medical data to HL7 messages is necessary. The HL7 is a standard protocol for data exchange in healthcare environments. In this paper, I implemented HL7 interface engine for Alzheimer's disease in elderly care facility. The interface engine is composed of the client system and the server system. The client system inputs user's medical care data for the aged, and builds them into HL7 message stream. HL7 messages in the client system transmitted over TCP/IP protocol to the server system. The server system parses and validates this messages stream to the segments and fields and then transmits acknowledgement to the client system. I implemented it using the Java and JavaCC. The study of interface engine implementation can be used meaningfully in electronic health record, telemedicine system, and medical information sharing among various healthcare institutions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.18-25
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• 2020

With the development of water internet technology, data communication between objects is expanding. Research related to data communication technology between vehicles that incorporates related technologies into vehicles has been actively conducted. For data communication between mobile terminals, data stability, reliability, and real-time performance must be guaranteed. The 5 GHz Wi-Fi band, which is advantageous in bandwidth, communications speed, and wireless saturation of the wireless network, was selected as the data communications network between vehicles. This study analyzes how to design and implement a 5 GHz Wi-Fi network in a vehicle network. Considering the characteristics of the mobile communication terminal device, a continuous variable communications structure is proposed to enable high-speed data switching. We simplify the access point access procedure to reduce the latency between wireless terminals. By limiting the Transmission Control Protocol Internet Protocol (TCP/IP)-based Dynamic Host Configuration Protocol (DHCP) server function and implementing it in a broadcast transmission protocol method, communication delay between terminal devices is improved. Compared to the general commercial Wi-Fi communication method, the connection operation and response speed have been improved by five seconds or more. Utilizing this method can be applied to various types of event data communication between vehicles. It can also be extended to wireless data-based intelligent road networks and systems for autonomous driving.

• The Transactions of the Korea Information Processing Society
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• v.6 no.1
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• pp.122-133
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• 1999

Uses can share information and use resources effectively by using TCP/IP-based networks. So, a protocol to manage complex networks effectively is needed. For the management of the distributed networks, the SNMP(Simple Network Management Protocol) has been adopted as an international standard in 1989, and the SNMPv2 in which a security function was added was published in 1993. There are two encryption schemes in SNMPv2, the one is a DES using symmetric encryption scheme and the other is a MD5(Message Digest5) hash function for authentication. But the DES has demerits that a key length is a few short and the encryption and the authentication is executed respectively. In order to solve these problems, wer use a RSA cryptography in this paper. In this paper, we examine the items related with SNMP. In addition to DES and MD5 propose in SNMPv3, we chance security functionality by adopting RSA, a public key algorithm executing the encryption and the authentication simultaneously. The proposed SNMPv3 security module is written in JAVA under Windows NT environment.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.247-249
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• 2005

최근 디지털 TV, DVD 플레이어, 홈시어터와 같은 디지털 A/V 기기들을 통합하여 멀티미디어 컨텐츠를 서비스 받는 홈 네트워크 기술에 대한 관심이 높아지고 있다. 이러한 환경에서 UpnP를 이용한 디지털 기기들의 상태를 모니터링하고, 사용자의 요청과 제어 명령을 전달하여, 멀티미디어 컨텐츠를 서비스 받을 수 있도록 하는 연구는 매우 중요하다. 그러나 UPnP는 TCP/IP 기반의 프로토콜을 사용하기 때문에 사용자 인터랙션에 의한 전송 지연 시간이 발생한다. 그러므로 본 논문에서는 셋탑 박스에 최적화된 UPnP AV 시스템을 구현하고 AV 컨텐츠의 효율적인 재생을 위한 UPnP프레임워크의 재생 기법을 제안한다. UPnP AV 시스템은 미디어 서버가 있고, 미디어 서버에 저장된 비디오/오디오 파일 등을 전송받아 재생하기 위한 셋탑 박스에는 컨트롤 포인트와 UPnP 미디어 렌더러의 통합 모델이 탑재된다. 이러한 기법은 다양한 기기를 제어하고 호환성을 제공하는 UPnP프레임워크가 될 수 있다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.2B
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• pp.263-268
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• 2010

This paper shows the key management system in a small metallic cabinet using a small UHF RFID tags. Each key chain with a key has a custom-designed small RFID tag antenna. There are 6 metallic racks in the small cabinet, and each rack can hold 60 key chains. Therefore, the small cabinet can hold 360 key chains with tags. The 360 key chains with RFID tags in a cabinet are recognized by RFID key chain management system. Even though it is hard to recognize 360 tags in the a cabinet, this RFID key management system with small custom designed RFID tags can recognize all the tags in the small cabinet. To read the all the tags, the locations of antennas and tag shapes are optimized. The reading rates based on the bios-version of the reader and the locations of the reader antennas are compared.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.3B
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• pp.339-348
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• 2004

Packet classification is an important factor to support various services such as QoS guarantee and VPN for users in Internet. Packet classification is a searching process for best matching rule on rule tables by employing multi-field such as source address, protocol, and port number as well as destination address in If header. In this paper, we propose hardware based packet classification algorithm by employing tree bitmap of multi-bit trio. We divided prefixes of searching fields and rule into multi-bit stride, and perform a rule searching with multi-bit of fixed size. The proposed scheme can reduce the access times taking for rule search by employing indexing key in a fixed size of upper bits of rule prefixes. We also employ a marker prefixes in order to remove backtracking during searching a rule. In this paper, we generate two dimensional random rule set of source address and destination address using routing tables provided by IPMA Project, and compare its memory usages and performance.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.38 no.3
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• pp.22-30
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• 2001

This paper investigated future telemedicine as implementation of the telemonitoring system using LAN environment. For telemonitoring system rapidly implementation used the PC compatible embedded computing system in the ROMDOS and application program used the WATTCP that free TCP/IP Stack. Host computer program - programed by Visual C++ - had saved ECG signal and Patient Data coming inside Embedded PC and displayed. Embedded PC acquired ECG signal and transmitted a Packet to Host Computer. Host Computer remote access Embedded PC. This structure is the same Client/Sever Model. This system will be basic telemedicine model. There are problems of realtime telemonitoring because of network delay and data packet. Because of these problems, telemedicine systems will be required faster network speed and method of bio-signal transmission.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.02a
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• pp.192-197
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• 2002

1. 실시간 모니터링 -온실 내부환경의 계측장치로 모듈화된 단일 칩 마이크로프로세서를 이용한 하우스 모니터를 개발하였다. 개발된 다수의 하우스 모니터는 RS-485통신을 이용하여 개발된 프로토콜을 통하여 그룹 모니터와 통신하면서 계측 데이터를 전송하였고 안정된 계측 성능을 보였다. 또한 그룹 모니터는 하우스모니터로부터 수신한 데이터를 인터넷 환경 TCP/IP 통신에 의해 서버에 정보를 전송하고 데이터베이스 서버에 저장할 수 있었다. 2. 클라이언트 서버 모델 -클라이언트 모니터를 통하여 허용된 사용자들은 해당 온실의 상황을 원격지에서 파악할 수 있는 있었다. 또한 분산환경 기술을 이용하여 서버를 경유하여 데이터베이스 서버에서 데이터 셋을 가져와 과거 재배 사례 등을 조회 및 이용 가능하였다. 이는 전문가에게 접근을 허용함으로써 재배에 관한 지원이 가능하도록 하였다. 데이터 베이스 시스템으로 연계하여 온실환경 정보를 분석하는 것이 가능하였다. 3. 기대효과 및 나아가야 할 방향 -개발된 시스템을 식물 공장 내 작물의 재배환경을 데이터베이스화하여 재배사례 데이터베이스를 형성하고 작물이 가장 잘 자라는 최적 재배 환경을 연구하여 고품질의 작물 재배에 이용될 수 있다. 또한 식물공장의 운전실적, 환경 조건, 환경 조절비용 등의 분석에 효율적으로 이용될 수 있을 것으로 예상되며 각 환경인자들과의 관계를 구명하는데 도움을 줄 것이다. 축적된 작물의 재배 사례 데이터베이스를 이용하여 작물 특성 및 재배 연구에 도움을 줄 수 있을 것이다. 제어 장치들의 운영실적을 분석함으로써 제어 시스템의 효율적이고 경제적인 제어가 가능하도록 할 수 있을 것이다. 이들이 모두 완성되면 전문가 및 전문가 시스템으로부터 지원을 받는 지능형 식물공장이 가능할 것이다. 본 연구에서 개발한 계측 모듈 및 데이터베이스 시스템은 실제 농가에 설치된 전용선을 이용하여 실증 실험을 통해 수정·보완하여야 할 것이다. 또한 시설원예분야에서 있어서 통신체계에 대한 표준화 연구가 수행되어 앞으로 개발될 다른 시스템들과의 호환성을 갖도록 해야 할 것이다. 앞으로 온실의 경영 및 관리 데이터베이스를 개발하여 첨단온실의 통합 관리 및 정보 시스템을 구축하여야 할 것이다. 또한, 시설원예의 환경 설계의 기준을 적용할 수 있도록 하여야 할 것이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.417-420
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• 2006

UPnP presents home network middleware for local home electrical appliances basedon internet protocols that is available access and control electrical appliances just in local home network. Itis designed to bring easy-to-use, flexible, standards-based connectivity to ad-hoc or unmanaged networks in the home, a small business, public spaces, or attached to the Internet. In this paper, Internet Gateway expands UPnP IGD(Internet Gateway Device) DCP(Device Control protocol) and UPnP IGP Bridge for Internet Home Network Electrical Appliance Control. UPnP IGD DCP is configurable initiation and sharing of internet connections, advanced connection-management features, management of host configuration service, and supports transparent Internet access by non-UPnP-certified devices. UPnP Bridge search for local home network devices by sending control messages. Control Point of UPnP Bridge search for devices of interest on the network and can control or be controlled all of functions by IGD DCP with control commands. Outside client, approach to UPnP IGD DCP, send control messages UPnP Bridge, and invoke each UPnP device. As a result, Electrical Appliance of Home Network base on UPnP, can control and be controlled via the Internet like ones in the one Home Network without modification of existing UPnP.