• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.527-530
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• 2017

LTE-R(Long Term Evolution-Railway) based on LTE technology is expected to use core communication technology for high speed railway as one of standards for railway communications. In this paper, transmission performance of video traffic as an application is analyzed on LTE-R networks. Performance is evaluated with compter simulation based NS(Network Simulator)-2, open video traffic is used, RTP(Real Time Protocol) is used for transmission protocol. Results and methods of this paper can be used for research and developmemt of LTE-R networks.

• The Transactions of the Korea Information Processing Society
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• v.6 no.9
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• pp.2512-2523
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• 1999

In this paper, we present the design and implementation results of RTP(Real-time Transport Protocol) which is introduced to provide end-to-end delivery service for multimedia data with real-time characteristics and to provide QoS(quality of service) monitoring services. Conventional RTP communication modules have some problems such as poor reusability and inefficiency. Reusability problem stems from the inherent characteristics of RTP that is framework is deliberately not complete, and so, RTP should have been designed and implemented in application-imbedded from. The RTP communication module, proposed in this paper, is designed and implemented in application-independent from in order to be used in all kinds of high level applications independent of their architectures and functions.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.4B
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• pp.227-233
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• 2007

According to the recent development of network technology, the demands of users are diversified and the needs of multimedia traffic are increasing. In general, UDP(User Datagram Protocol) traffic is used to transport multimedia data, which satisfied the real-time and isochronous characteristics. UDP traffic competes with TCP traffic and incur the network congestion. However, TCP traffic performs network congestion control but does not consider the receiver's status. Thus, it is not appropriate in case of streaming services. In this paper, we solve a fairness problems and proposed a network algorithm based on RTP/RTCP(Real-time Transport Protocol/Realtime Transport Control Protocol) in view of receiver status. The POBA(Priority Ordered Buffer Algorithm), which applies priorities in the receiver's buffer and networks, shows that it provides the appropriate environment for streaming services in view of packet loss ratio and buffer utilization of receiver's buffer compared with the previous method.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.393-395
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• 2000

CSCW 시스템은 효율적인 공동작업의 인지를 위해 텔리포인팅, 스냅샷, 문서/프로젝트 추적등과 같은 기능들을 제공한다. 이 중 텔리포인팅은 지역 시스템의 공유윈도우에서 텔리포인터를 통해 발생한 이벤트를 원격지 시스템의 공유윈도우에 동기적으로 표현하는 기법이다. 텔리포인팅은 여러 연구들에서 응용된 바 있으나, 텔리포인팅의 프로토콜에 관한 연구는 미흡하다. 본 논문은 RTP(Real-Time Transport Protocol) 기반의 텔리포인팅을 위한 RTP 페이로드 형식을 정의한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.112-114
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• 2001

최근 멀티미디어 서비스에 대한 사용자의 요구가 증가되고 있다. 그러나 서버 시스템은 이러한 멀티미디어 데이터에 대해 사용자들에게 효율적으로 공급하지 못한다. 본 논문에서는 기존의 운영체제에 멀티미디어 데이터 전송을 효율적으로 만족시키기 위한 방안으로 RTP(Real-time Transport Protocol) 데이터 처리를 SIO(Special Input/Output) 메커니즘 커널에 내장하는 SPTPIO(Special RTP Input/Output) 모듈을 제안한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.13 no.4
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• pp.177-186
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• 2003

DRM(Digital Rights Management) is a technology that manages secure distributions and copyrights of digital contents on the Internet. It is general giving the rights to use the encrypted contents that are downloaded by a simple authorization process in the existing DRM system. Once this is done you are allowed to access. In this paper, we use RTP(Real-time Transport Protocol) for end-to-end real-time data transmission. And the system is designed to make it Possible to Protect copyrights and to distribute contents with safety through periodic authentication. We implemented DRM system to stand this basis. The proposed system vests only authorized users with authority to access the license. Hence it prevents contents to be distributed and copied illegally on networks.

• Information and Communications Magazine
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• v.14 no.6
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• pp.123-132
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• 1997

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.65 no.4
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• pp.326-334
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• 2016

In this paper for developing and implementing the realtime HD level video streaming transmitter which is operated on the multi-platform in all network and client environment compared to the exist video live streaming transmitter. We design the realtime HD level video streaming transmitter supporting the multi-platform using the TMS320DM386 video processor of T.I company and then porting the Linux kernel 2.6.29 and implementing the RTSP(Real Time Streaming Protocol)/RTP(Real Time Transport Protocol), HLS(Http Live Streaming), RTMP(Real Time Messaging Protocol) that can support the multi-platform of video stream protocol of the received equipments (smart phone, tablet PC, notebook etc.). For proving the performance of developed video streaming transmitter, we make the testing environment for testing the performance of streaming transmitter using the notebook, iPad, android Phone, and then analysis the received video in the client displayer. In this paper, we suggest the developed the Realtime HD(High Definition) level Video Streaming transmitter performance data values higher than the exist products.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.643-645
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• 2010

The Internet-based multimedia services such as IPTV is being expanded with the development of technology to support the convergence of broadcasting and telecommunications technology for the control seems to be growing larger. Especially for the real-time TV broadcast multicast control technology to support the authentication and resource control, in addition to the technology services that enhance the value of technology for a variety of services in both directions seems to be developed. And, Internet-based transmission system transmit the video content for the video content delivery using RTP(Real Time Transport Protocol). Standardization body, IETF(Internet Engineering Task Force) within the RTP, according to a variety of audio and video formats only transmission format(RTP Payload Format) Establish a separate standard and scalable video content "RTP Payload Format for SVC(Switched Virtual Connection) Video" the standardization is currently processing. In this paper we are improving the quality of broadcasting and telecommunication systems, so that the upper layer by the application can react adaptively to the existing MPEG2-TS and RTP who are provided by a variety of content applied to a variety of devices consumers ETE(End- to-End) QoS(Quality of Service) for enhance the system who was designed and implemented.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.155-158
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• 2000

텔리포인팅은 지역 시스템의 공유윈도우에서 텔리포인터를 통해 발생하는 이벤트를 원격지 시스템의 공유윈도우에 동기적으로 표현하는 기법이다. 이러한 텔리포인팅은 다양한 CSCW분야에서 응용되고 있다. 본 논문은 다양한 텔리포인팅의 기능을 제공할 수 있고 응용프로그램에 상관없이 응용이 가능한 텔리포인팅 모듈을 설계하고 구현한다. 텔리포인팅 모듈은 텔리포인팅 이벤트의 송수신을 위해 RTP(Real-Time Transport Protocol)을 사용한다. 구현된 모듈이 잘 동작함을 보이기 위해 다가간의 텔리포인팅을 지원하는 화이트보드를 구현하고 인터넷 상에서 시연하였다.