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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editor: Richard A. Linke
  • Vol. 5, Iss. 12 — Dec. 1, 2006
  • pp: 1013–1027

Efficient control-channel multifailure management mechanism in GMPLS-based optical networks

Raül Muñoz, Ricardo Martínez, and Gabriel Junyent  »View Author Affiliations


Journal of Optical Networking, Vol. 5, Issue 12, pp. 1013-1027 (2006)
http://dx.doi.org/10.1364/JON.5.001013


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Abstract

Feature Issue on High Availability in Optical Networks

In generalized multiprotocol label switching (GMPLS) architecture, the control channels between each pair of optical nodes are not forced to use the same physical link as the data/transport channels. The problem arises when, due to the fact of allowing the control channels to be physically diverse from the associated data links, there may not be any active control channels available while data channels are still in use. Control-channel faults should not have a service impact on the existing connections; that is, a link that is carrying data traffic must not be torn down because the control channel is no longer available. But, due to the lack of the control channel, the active traffic that is using the data link may no longer be guaranteed with the same level of recovery service (protection or restoration). Under these circumstances the link must be considered to be in a degraded state. This means that routing and signaling should be notified that new connections are not accepted and the link is advertised with no unreserved resources. For this purpose, here we propose a control-channel multifailure management mechanism involving routing, signaling, and link management with extended GMPLS-based protocol extensions to keep the same level of service (in terms of provisioning and recovery) when a link is in the degraded state.

© 2006 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4250) Fiber optics and optical communications : Networks
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
High Availability in Optical Networks

History
Original Manuscript: January 1, 2006
Revised Manuscript: August 29, 2006
Manuscript Accepted: September 8, 2006
Published: November 17, 2006

Virtual Issues
High Availability in Optical Networks (2006) Journal of Optical Networking

Citation
Raül Muñoz, Ricardo Martínez, and Gabriel Junyent, "Efficient control-channel multifailure management mechanism in GMPLS-based optical networks," J. Opt. Netw. 5, 1013-1027 (2006)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jon-5-12-1013


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