• TTA REPORT
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• v.4 no.4 s.14
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• pp.36-47
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• 1992

• Journal of the Korean Professional Engineers Association
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• v.27 no.4
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• pp.77-84
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• 1994

• Information and Communications Magazine
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• v.8 no.12
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• pp.57-72
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• 1991

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1992.06a
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• pp.317-320
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• 1992

• TTA Journal
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• s.54
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• pp.55-71
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• 1997

본 고에서는 국제표준화 기관인 ITU-T에서 진행하고 있는 ATM 기술관련 최신 동향에 대하여 기술한다. 특히 B-ISDN의 일반적인 망측면을 다루고 있는 Study Group 13의 표준화 활동에 대하여 중점적으로 설명한다.

• Journal of Korean Electronics
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• v.16 no.6
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• pp.104-106
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• 1996

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.5B
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• pp.809-819
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• 2000

This paper deals with an optimal capacity allocation problem and performance analysis in Advanced Information Communication Processing System(AICPS). AICPS is a gateway system interconnection PSTN(Public Switched Telephone Network), ISDN(Intergrated Services Digital Network), PSDN(Packet Switched Data Network), internet, Frame Relay and ATM together. This study considers not only ISDN and Internet but also user behavior of On-line service which is analyzed by Markov process. A call blocking probability of TNAS and INAS is computed by Erlang's formula. Then, PNAS and WNAS's call blocking probability are computed by Stochastic knapsack modeling. The result is compared with result of simulation. Finally, we allocate an optimal capacity minimizing total call blocking probability.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.5
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• pp.842-856
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• 1994

The various services that a broadband integrated services digital network (B-ISDN) carries, have a wide range of delay, delay jitter and cell loss probability requirements. Design of appropriate control schemes for B-ISDN is an extremely important and challenging problem. In this paper, we proposed multiplexing algorithm with both delay and loss priorities in order to satisfy the diverse requirements. For the implementation of cell lose priority, we assumed that voice cells are generated as non-discardable(i.e., high priority) and discardable (i.e., low priotity)cells. The low priority voice cell may be discarded inside the network if congestion occurs. The cell dropping scheme is shown to reduce cell losses as well as delays for both voice and data. Such a load shedding scheme is expected to improve significantly utilization of B-ISDN.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.921-923
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• 1987

This paper describes the design and implementation of LAPD protocol for ISDN Basic Access. In protocol design, Software module is divided according to function and interfaces between modules arc defined. After that, Software structure is defined. LAPD protocol is designed by state machine design technique and implemented by SDL.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1998.11a
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• pp.333-339
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• 1998

DECT는 기존의 사설 교환시스템에 이동통신 서비스를 제공하기 위한 디지탈 방식의 무선통신 규약으로 발신전용 무선전화 기술인 CT2의 기능 상의 제약을 극복하고, 빌딩외 옥내형 이동통신을 위한 GSM의 이상적인 보완책으로 각광을 받고 있다. 본 논문에서는 유선통신의 제약으로 인해 사용자가 이동중에는 통신서비스를 제공받을 수 업는 종래 사설교환기의 문제점을 극복하기 위해 ISDN 사설교환망과 DECT 이동통신망간에 연동을 위한 IWU의 프로토콜을 설계하고 구현하였다.