• ETRI Journal
• /
• v.8 no.3
• /
• pp.51-66
• /
• 1986

Packet switching 서비스 특성과 packet mode 터미널 수용을 위한 시스팀의 기능 및 packet switching을 실현한 타 교환기를 살펴보고 이를 토대로 ISDN을 위한 packet switching 실현시 교환기 측면에서의 고려사항과 실현해야 할 기본기능을 기술한다.

• ETRI Journal
• /
• v.8 no.3
• /
• pp.79-88
• /
• 1986

본고에서는 user network interface의 일반적 기능과 이의 실현을 위해 진행중인 ISDN 교환기종들을 검토하여 ET(Exchange Termination)의 구성시 요구되는 H/W 설계 방안을 제시하였다.

• Proceedings of the IEEK Conference
• /
• 2003.07a
• /
• pp.394-397
• /
• 2003

This paper has been studied a interworking signalling protocol between two hybrid networks by analyzing Satellite B-ISDN architecture, DSS2 Layer 3 Signalling protocol, B-ISUP protocol, S-BISUP protocol stack and so on. Also in the paper, messages and primitives have been defined for B-ISDN's Connection Type, Ownership and each protocol in order to connect point-to-multipoint. And then this paper has designed basic call procedures for OBP Satellite B-ISDN NNI interworking protocol, verified and implemented them.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.22 no.3
• /
• pp.547-556
• /
• 1997

In this paper we suggest a dynamic quota allocation mechansim for B-ISDN(Broadband Integrated Services Digital Network) subscriber networks. The quota adaptation decision based on the number of cells in the transmission queue is made distributively by each node in the ring network. This mechanism provides both fairness and efficiency for it enables each node to adapt its quota under asymmetric traffic condition. The simulation results show that substantial improvements in access delay time and throughput can be achieved with this algorithm.

• Journal of Communications and Networks
• /
• v.10 no.3
• /
• pp.316-330
• /
• 2008

This paper proposes a novel method for transporting various types of user traffic effectively over the next generation network called integrated services digital network 3 (ISDN3) (or quantum network) using quantum packets. Basically, a quantum packet comprises one or more 53-byte quanta as generated by a "quantumization" process. While connection-oriented traffic is supported by fixed-size quantum packets each with one quantum to emulate circuit switching, connectionless traffic (e.g., IP packets and active packets) is carried by variable-size quantum packets with multiple quanta to support store-and-forward switching/routing. Our aim is to provide frame-like or datagram-like services while enabling cell-based multiplexing. The quantum packet method also establishes a flexible and extensible framework that caters for future packetization needs while maintaining backward compatibility with ATM. In this paper, we discuss the design of the quantum packet method, including its format, the "quantumization" process, and support for different types of user traffic. We also present an analytical model to evaluate the consumption of network resources (or network costs) when quantum packets are employed to transfer loss-sensitive data using three different approaches: cut-through, store-and-forward and ideal. Close form mathematical expressions are obtained for some situations. In particular, in terms of network cost, we discover two interesting equivalence phenomena for the cut-through and store-and-forward approaches under certain conditions and assumptions. Furthermore, analytical and simulation results are presented to study the system behavior. Our analysis provides valuable insights into the. design of the ISDN3/quantum network.

• Journal of the Korea Society of Computer and Information
• /
• v.3 no.2
• /
• pp.161-168
• /
• 1998

This paper proposes the distance-video-guarding system technology based on collaboration CBM personal computer which enables additional functions such as monitoring each room while the guarding is in progress. This system sends the atmosphere of guarding by checking the status of environment with the sensor using ISDN. Current remote guarding desktop system uses leased lines (T1/E1 ) applying fast speed rate and security. This system provides an external monitoring system which runs on ISDN Public line also. Monitoring system transfers the natural status of each site to center controller of the guarding system.

• Journal of Electrical Engineering and information Science
• /
• v.3 no.1
• /
• pp.21-27
• /
• 1998

In this paper we apply routing algorithms in circuit switched networks to B-ISDN networks and investigate the performance. B-ISDN supports a wide range of services with hetrogeneous bandwidth requirements. We assume that the network supports D classes of traffic. It is modeled as a finite D dimensional Markov chain. A call is blocked on arrival if the required bandwidth is not available on the route. The shortest path routing, alternate routing and trunk reservation are considered for performance comparison. We also consider trunk reservation with restricted access control where the network reserves certain amount of bandwidths for one class of traffic that assumes a higher transmission priority. Through the method of successive iterations, we obtain the steady state equilibrium probabilities and call blocking probabilities for dynamic routing. The results can be used to design a B-ISDN network that improves network connection availability and efficiency while simultaneously reducing the network costs.

• ETRI Journal
• /
• v.7 no.3
• /
• pp.42-48
• /
• 1985

본고에서는 가입자 선로상에서 필요한 ISDN 가입자장치를 경제적이고 신뢰성있게 구현하기 위해 여러 반도체회사에서 개발중에 있는 VLSI 칩에 대한 개발추세 및 각 제작회사들에 의해 알려진 ISDN용 VLSI 칩 소개와 그 특징에 대해 기술하였다.

• Proceedings of the KIEE Conference
• /
• 1987.07b
• /
• pp.924-927
• /
• 1987

This paper describes the design of ISDN D channel Layer 3 protocol for the supplementary service after the Basic Service was implemented. It provides overview interaction diagram for user side and network side of the interface for a circuit-switched call as a design model and explains processes and signals.

• TTA REPORT
• /
• v.3 no.3 s.9
• /
• pp.7-9
• /
• 1991