Routing pre-configuration for fast and scalable path restoration in DWDM networks
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In high-speed WDM optical networks, failure recovery is a critical issue as a single element failure in the network will result in the interruption of multiple services. Distributed path restoration is preferable for its high flexibility and efficient resource utilization. However, with the development and maturity of Dense Wavelength Division Multiplexing (DWDM) technology, the resource contention problem arises when simultaneously restoring a large amount of services initiated from many uncoordinated source nodes. This will degrade network performance and result in long service recovery latency. In this paper, we present the Routing Pre-Configuration (RPC) scheme for fast and scalable path restoration in DWDM networks, where pre-failure configuration and post-failure signaling are demonstrated. We compare it with the previous contention resolution approaches and the simulation results prove its improvement in restoration blocking probability and average restoration time.
KeywordsDWDM networks Restoration Resource contention Scalability
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- 4.Hiroaki Komine, Takafumi Chujo, Takao Ogura, Keiji Miyazaki, Tetsuo Soejima: A distributed restoration algorithm for multiple-link and node failures of transport networks. In: Proceedings of IEEE Conference on Global Telecommunications, San Diego, CA, USA, December 1990, pp. 459–463Google Scholar
- 5.Han, S., Shin, K.G.: Efficient spare-resource allocation for fast restoration of real-time channels from network component failures. In: Proceedings of IEEE Conference on Real-Time Systems Symposium, Montreal, Canada, June 1997, pp. 99–108Google Scholar
- 6.Fumagalli, A., Valcarenghi, L.: The preplanned weighted restoration scheme. In: Proceedings of IEEE Workshop on High Performance Switching and Routing, Dallas, TX, USA, May 2001, pp. 36–41Google Scholar
- 8.Feifei Feng Zheng Xiaoping, Zhang Hanyi, Guo Yili: A contention avoidance scheme for distributed path restoration in WDM networks. In: Proceedings of ECOC, Remini, Italy, Sep. 2003, pp. 834–835Google Scholar
- 9.Cai, J.-X., Foursa, D.G., Davidson, C.R., Cai, Y., Domagala, G., Li, H., Liu, L., Patterson, W.W., Pilipetskii, A.N., Nissov, M., Bergano, N.S.: A DWDM demonstration of 3.73 Tb/s over 11000 km using 373 RZ-DPSK channels at 10 Gb/s. In: Proceedings of Optical Fiber Communication Conference, Atlanta, GA, USA, March 2003, pp. PD22. 1–3Google Scholar
- 10.Network Simulator, NS-2, available at http://www.isi. edu/nsnam/nsGoogle Scholar
- 11.John Moy: OSPF version 2, RFC 2328, IETF, Apr. 1998Google Scholar
- 12.Jamoussi, B.: Constraint-based LSP setup using LDP, RFC 3212, IETF, Jan. 2002Google Scholar