Wavelength retuning without service interruption in an all-optical survivable network

This paper proposes a new wavelength retuning (WRT) scheme in an all-optical WDM network. Compared with the existing WRT schemes developed for all-optical networks, which can alleviate the wavelength-continuity constraint but cannot avoid service interruption or data loss, the proposed scheme is able to alleviate the wavelength-continuity constraint and reduce the connection blocking probability with no service interruption to the on-going traffic. This is achieved by allocating two routes, one for active path and one for backup path, to each incoming connection request and conducting WRT only on the backup path. The backup path provides an alternate path in case of a failure, while the active path carries traffic under normal conditions. Thus, WRT on the backup path will not cause any impact on data transmission. An optimal backup path WRT scheme and a heuristic algorithm are developed and the performance evaluation on the proposed schemes is presented. The simulation results show that the proposed optimal scheme reduces the connection blocking probability by 46.8p on average, while the proposed heuristic scheme reduces the blocking probability by 28.3p on average, all compared with the scheme without WRT. Copyright © 2009 John Wiley & Sons, Ltd.

[1]  Xiang-Yang Li,et al.  Lightpath rerouting in wavelength-routed WDM networks , 2008 .

[2]  Chunming Qiao,et al.  A joint working and protection path selection approach in WDM optical networks , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[3]  Eric Bouillet,et al.  Lightpath Re-optimization in mesh optical networks , 2005, IEEE/ACM Transactions on Networking.

[4]  K. Lee,et al.  A wavelength rerouting algorithm in wide-area all-optical networks , 1996 .

[5]  Gurusamy Mohan,et al.  A time optimal wavelength rerouting algorithm for dynamic traffic in WDM networks , 1999 .

[6]  Eytan Modiano,et al.  Efficient routing and wavelength assignment for reconfigurable WDM ring networks with wavelength converters , 2005, IEEE/ACM Transactions on Networking.

[7]  Sudipta Sengupta,et al.  Capacity efficient distributed routing of mesh-restored lightpaths in optical networks , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[8]  Yu Liu,et al.  Approximating optimal spare capacity allocation by successive survivable routing , 2005, TNET.

[9]  Chunming Qiao,et al.  On finding disjoint paths in single and dual link cost networks , 2004, IEEE INFOCOM 2004.

[10]  Biswanath Mukherjee,et al.  Virtual-topology adaptation with minimal lightpath change for dynamic traffic in WDM mesh networks , 2002, Optical Fiber Communication Conference and Exhibit.

[11]  Biswanath Mukherjee,et al.  Wavelength-routed optical networks: linear formulation, resource budgeting tradeoffs, and a reconfiguration study , 2000, TNET.

[12]  Chadi Assi,et al.  Efficient path selection and fast restoration algorithms for shared restorable optical networks , 2003, IEEE International Conference on Communications, 2003. ICC '03..

[13]  Bo Li,et al.  A dynamic RWA algorithm in a wavelength-routed all-optical network with wavelength converters , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).