대한전자공학회논문지TC (Journal of the Institute of Electronics Engineers of Korea TC)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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차세대 OVPN에서 차등화된 광 QoS 서비스를 위한 제어 메커니즘 연구

(A Study on Control Mechanism for Differentiated Optical QoS in Next Generation OVPN)

  • 발행 : 2005.09.01
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초록

IP망을 활용한 VPN(Virt at Private Network)은 비용과 운용측면에서 효율적이지만 QoS 보장 메커니즘과 광대역 서비스 제공에 많은 문제점을 가진다. 이러한 IP기반의 VPN에서 QoS 보장과 광대역폭 제공에 대한 해결책으로 차세대 광 인터넷을 통한 OVPN(Optical VPN) 기술이 제시되고 있다. 차세대 광 인터넷 백본망 기술은 DWDM(Dense-Wavelength Division Multiplexing) 광 네트워크 기술을 활용하고, IP 전달을 위한 제어 프로토콜은 GMPLS 기술을 사용하는 IP/GMPLS over DWDM 프로토콜 프레임워크로 표준화되고 있는 현실에 비추어, IP/GMPLS (Generalized Multi-Protocol Label Switching) over DWDM 백본망을 통한 OVPN은 차세대 가상사설망으로써 멀티미디어 서비스 제공을 위한 적절한 대안이다. 그리고 이러한 멀티미디어 서비스 제공을 위한 OVPN에서 종단간 QoS 보장을 위해 차등화된 광 QoS 서비스 제공 메커니즘 또한 요구된다. 따라서 본 논문에서는 OVPN over IP/GMPLS over DWDM에서 멀티미디어 서비스 제공을 위해 차등화된 광 QoS 클래스를 고려한 제어 프로토콜들의 상호 연동 과정을 제안한다.

A 'VPN over Intemet' has the benefit of being cost-effective and flexible. However, it has difficulties providing sufficient QoS and adequate transmission capacity for high bandwidth service. Given the increasing demand for high bandwidth Internet and QoS assurances in a 'VPN over Internet', IP/GMPLS based on a control plane combined with a high bandwidth, DWDM optical network is seen as a very favorable anroach for realizing the future 'OVPN over IP/GMPLS over DWDM'. Within this architecture, providing QoS guaranteed multimedia services with a differentiated QoS guaranteed protocol framework with QoS recovery is one of the key issues to implement. Therefore, in this paper, we suggest the entire interoperability procedure of control protocols based on differentiated optical QoS service (DOQOS) classes for providing end-to-end QoS in an 'OVPN over IP/GMPLS over DWDM' architecture.

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참고문헌

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