Mr. Dae-gun Kim Profile

Dae-gun Kim

at Korea Univ

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Publications (3)

Proceedings Article | 9 September 2002 Paper

Reliable fault management using hierarchical path protection mechanism for differentiated services in GMPLS networks

Dae-gun Kim, Sung-Woo Ryu, Sung-Kwan Youm, Kyung-Young Kang, Chul-Hee Kang

Proceedings Volume 4910, (2002) https://doi.org/10.1117/12.482436

KEYWORDS: Optical networks, Multimedia, Atrial fibrillation, Network architectures, Failure analysis, Databases, Electronics, Computer engineering, Switching, Signal detection

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To deliver reliable differentiated services in optical networks, GMPLS requires a set of procedures to provide protection for the traffic carried on the light paths. In this paper we propose a hierarchical path protection mechanism that is simple, scalable, fast, and efficient. We describe in detail our design considerations, the communication of fault information to appropriate forwarding or/and switching elements, and the fault detection protocol. In particular, we propose a new notification protocol for efficient and fast distribution of fault notification messages. A new Hierarchical Path Protection (HPP) improves the utilization of network resources- Label Switched Paths (LSPs) such as Electrical LSP (E-LSP), Lambda-LSP (L-LSP), WaveBand-LSP (WB-LSP), Fiber-LSP (F-LSP), bandwidth etc.- that are necessary when recovery mechanism occurred in the GMPLS networks. The HPP is used in the multiple-layer networks made by priority number of paths. We assume that there are three kinds of priorities on LSPs by their traffic characteristics of multimedia services, real time, mission-critical and best-effort services in the GMPLS networks. When the faults of LSPs are detected, primary LSPs classified by the priority of multimedia traffic choose recovery mechanism according to their priorities. In the priority based LSPs, each LSP has its own recovery mechanism that the LSP of priority 1 (real-time traffic) has the dedicated protection scheme, the LSP of priority 2 (mission-critical traffic) has the preplanned restoration scheme and the LSP of priority 3 (best-effort traffic) has the dynamic restoration scheme. After recovery mechanism is accomplished, the information for setting up on LSP based on the given priority is transferred to the ingress Optical Cross Connect (OXC) for the purpose of making new LSP. The OXC has the structure capable of setting up new LSPs or releasing LSPs via a signaling to maintain the consistent recovery, regardless of fault count, based on the priority scheme. The HPP has some advantages expa

Proceedings Article | 9 September 2002 Paper

Priority-based recovery scheme improving network utilization in the IP over optical networks

Sung-Woo Ryu, Dae-gun Kim, Joo Youn, Sok Jung, Chul-Hee Kang

Proceedings Volume 4910, (2002) https://doi.org/10.1117/12.482425

KEYWORDS: Optical networks, Artificial intelligence, Signal detection, Network architectures, Wavelength division multiplexing, Failure analysis, Computer simulations, Internet, Double positive medium, Signal processing

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Proceedings Article | 17 October 2001 Paper

Optical multicast using a mixed waveband forwarding in MPL(ambda)S network

Dae-gun Kim, Kyung-Young Kang, Joosang Yoon, Sung-Woo Ryu, Chul-Hee Kang

Proceedings Volume 4585, (2001) https://doi.org/10.1117/12.445199

KEYWORDS: Switching, Optical networks, Switches, Channel projecting optics, Interfaces, Receivers, Optical matrix switches, Asynchronous transfer mode, Optical tracking, Network architectures

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