• Construction Engineering and Management
• /
• v.10 no.6
• /
• pp.20-21
• /
• 2009

• The Transactions of the Korea Information Processing Society
• /
• v.4 no.12
• /
• pp.3097-3110
• /
• 1997

As to the recent advances in computer technologies and high-speed networks, telecommunication services and provision of multimedia services will be provided on the basic of a new software architecture adapting networking infrastructure on open information networking architecture. In this paper, the video conference services has been selected as a target service example because it is expected to become one of the most important services on the full service network. In fact, it can be viewed as the basis for providing telecommunication services such as video telephony and video conferencing. This paper presents the prototyping of TINA (Telecommunication Information Networking Architecture) based desktop video conference system using the concepts of session management. The prototyping of desktop video conference system aims at assessing TINA concepts and refinement of the mapping between session graph and connection graph, and provides object modeling methodologies towards distribution and objected-orientation.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.12 no.1
• /
• pp.35-41
• /
• 2016

Internet of Things (IoT) services are widely used in appliances of daily life and industries. IoT services also provide various conveniences to users and are expected to affect value added of all industries and national competitiveness. However, a variety of security threats are increased in IoT environments and lowers reliability of IoT devices and services that make some obstacles for commercialization. The attacks arising in IoT environments are making industrial and normal life accidents unlike existing information leak and monetary damages, and can expand damage scale of leakage of personal information and privacy more than existing them. To solve these problems, we design a session key based access control scheme for secure communications in IoT environments. The proposed scheme reinforces message security by generating session key between device and access control network system. We analyzed the stability of the proposed access scheme in terms of data forgery and corruption, unauthorized access, information disclosure, privacy violations, and denial of service attacks. And we also evaluated the proposed scheme in terms of permission settings, privacy indemnity, data confidentiality and integrity, authentication, and access control.

• Journal of the Korean Home Economics Association
• /
• v.41 no.6
• /
• pp.47-61
• /
• 2003

The purpose of this study is to develop and to evaluate the premarital preparation education program based on the integrated approach of family relation and resource management to attempt to reduce marital distress. Using a combination of previous premarital education program and survey result of educational need, it is consisted of 4 sessions (session 1: Meaning and expectation of the marriage, session 2: Couple Communication, session 3: Love and Sexuality, session 4: Family Life Planning) The result of the evaluation, the efficiency of this premarital preparation program was proved. In the 11 couples evaluation data, those who had taken premarital education program were more likely to satisfied program and more likely to invite the others to join this program. When asked what content areas were most helpful, the two top ranking went to the Couple Communication (41.9% rated as helpful), and Family Life Planning (35.5% rated as helpful).

• The Transactions of the Korea Information Processing Society
• /
• v.6 no.5
• /
• pp.1253-1262
• /
• 1999

For the efficient co-authoring of multimedia documents in a distributed systems environment, the cooperative-work management systems that can not only allow the sharing of distributed resources but also facilitate the authors' interaction, are needed. In this paper, we present a cooperative-work management system with hybrid architecture, called CW-MAN, in which the information on shared objects and co-authoring management is stored in a dedicated computer system but the shared objects distributed all over the local computer systems. The main management functions provided by the CW-MAN are those for shared objects, session, and telepointing. The shared-object use them exclusively. The session managements allows authors to dynamically create, update, and destroy sessions. Lastly, the telepointing management allows local pointing events to be synchronously presented to remote systems.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.04d
• /
• pp.430-432
• /
• 2003

멀티미디어 기술의 발달로 다자간 그룹 통신에 참여하는 참여자는 증가하고 있다. 그에 따라 많아진 참여자들의 정보와 현재 창설자의 상태 등을 관리해 줄 수 있는 멤버쉽 관리 기능을 해주는 구조가 필요하다. 본 논문에서는 이러한 다자간 그를 통신에서 그룹의 세션을 관리하는 세션 관리(Session Management)와 참석자들의 정보와 현재 상태 등을 관리하는 멤버쉽 관리(Membership Management) 기능을 가진 GMP(Group Management Protocol)를 설계 구현하였다 이러한 GMP는 클라이언트/서버 기반으로 동작하며, 서버 측에서 클라이언트를 관리한다. 설계된 관리 기능의 알고리즘은 간단하기 때문에 다자간 그룹 통신에서 간단하고 효율적인 관리를 할 수 있으며, 관리를 서버 측에서 항으로서 송신자 측의 부담이 줄어든다. 본 논문에서는 SM과 MM을 시험하기 위한 응용으로서 파일 전송 응용을 사용하여 실험하였다.

• Journal of Korea Multimedia Society
• /
• v.18 no.5
• /
• pp.631-640
• /
• 2015

Recently CCTV system is installed widely purpose to enhanced physical security, gathering criminal evidence and management of facilities. In spite of supporting strong management function, CCTV system has weak security function. Therefore high security management function is required. Generally it's not easy to control the devices under NAT using a NMS(Network Management System). So we design and implement alive check algorithm of CCTV devices under NAT using DVRNS address resolution and TCP session check. We evaluated and analyzed of developed system on real environment which includes about 100 DVRs under NAT. As a result of test, it showed that device alive check and DVRNS address resolution were well performed without any error.

• Proceedings of the Korean Information Science Society Conference
• /
• 2000.10b
• /
• pp.218-220
• /
• 2000

그룹웨어는 시.공간적으로 떨어져 있는 사용자들이 공동작업을 수행할 수 있도록 만들어진 어플리케이션이다. 따라서 싱글 유저 어플리케이션과 비교하여 사용자간 데이터 공유 지원, 통신 지원, 사용자 관리 등 추가적으로 구현해야 될 사항이 많다. 이 논문에서는 이러한 그룹웨어 어플리케이션 개발에 편의를 제공하고자 그룹웨어 어플리케이션이 공통적으로 개발하여야 하는 루틴을 라이브러리로 시스템 차원에서 지원해 주는 툴킷, SessionKit을 개발하여 소개한다. SessionKit은 자바로 구현된 순수 객체 모델 기반의 툴킷으로 일반 객체와 공유 객체 사이에 사용 방법상의 차이를 없앰으로써 메시지 전달 방식에 의한 데이터 공유에 비해 개발자에게 한 단계 높은 abstraction을 제공한다. 또한 일반적으로 그룹웨어 어플리케이션이 어플리케이션 단위로 데이터를 공유하는데 반해 SessionKit 시스템은 개별 객체를 그 공유 단위로 함으로써 서로 다른 어플리케이션 간에도 정보 공유가 가능하도록 한다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2001.10c
• /
• pp.340-342
• /
• 2001

최근 인터넷 통신의 형태가 단순한 텍스트 위주의 데이터로부터 실시간 환경을 요구하는 멀티미디어 데이터 형태로 변하고 있으며, 사용자들간의 실시간적 상호작용이 필요한 원격회의나 인터넷방송. 다중 멀티미디어 게임 등에 대한수요가 증가하고 있다. 이런 응용 서비스들은 동시에 여러 사용자에게 같은 정보를 보내야 하며 이런 서비스들의 효율성을 향상시키기 위해서는 멀티캐스트를 이용한 통신이 요구된다. 멀티캐스트 통신에서는 각 참여자들의 특성 에 따라 세션이 생성되며 생성된 세션들의 관리가 필요하다. 본 논문에서는 멀티캐스트 통신을 하기 위해 필요한 웹 기반의 세션 관리 프로토콜을 구현하였다. 추후에는 구현된 세션 관리 프로토콜인 SMP(Session Management Protocol)와 함께 세션의 참여자들을 관리하기 위한 프로토콜인 MMP(Membership Management Protocol)를 구현하고 이 세션과 참여자 관리 구조를 바탕으로 세션 전송 프로토콜인 GMP(Group Management Protocol)를 구현할 계획이다.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.10 no.2
• /
• pp.61-73
• /
• 2014

An automatic vehicle location tracing system is to build GIS server and on transmission for providing service in various ways by collecting a GPS location information from each vehicle. It is to save GPS data from OBU built-in on the vehicle and transmit the GPS data using the RSU on the roadside and WAVE communication technology. The collected data from the RSU is transmitted to the GIS server and stored in DB(database) and based on the GPS data that was collected from the each vehicle the system is to provide user service to suit the applications so it is to provide various services between RSU and OBU. In this paper, by implementing a multi-session process between the RM and the RMA a variety of services between RSU and OBU are provided. In addition, the system is designed and implemented using GPS to provide a variety of services, for the services provided from each RMA by configuring them as an independent session so it enables a variety of services implemented from one of RSU. With the result of the comparative analysis on the multi-session processing and single-session processing it shows that the differenes of them are minor in repect of the data loss rate and the data transfer rate but various services can be provided.