Routing and wavelength assignment in all-optical networks
IEEE/ACM Transactions on Networking (TON)
Routing in a linear lightwave network
IEEE/ACM Transactions on Networking (TON)
Adaptive wavelength routing in all-optical networks
IEEE/ACM Transactions on Networking (TON)
Provisioning algorithms for WDM optical networks
IEEE/ACM Transactions on Networking (TON)
Journal of High Speed Networks
Cost-effective traffic grooming in WDM rings
IEEE/ACM Transactions on Networking (TON)
Efficient algorithms for routing dependable connections in WDM optical networks
IEEE/ACM Transactions on Networking (TON)
Optimal Design of Optical Ring Networks with Differentiated Reliability (DiR)
QoS-IP '01 Proceedings of the International Workshop on Quality of Service in Multiservice IP Networks
Routing and Wavelength Assignment for Establishing Dependable Connections in WDM Networks
FTCS '99 Proceedings of the Twenty-Ninth Annual International Symposium on Fault-Tolerant Computing
On joint protection/restoration in IP-centric DWDM based optical transport networks
IEEE Communications Magazine
Emerging technologies for fiber network survivability
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Lightpath restoration in WDM optical networks
IEEE Network: The Magazine of Global Internetworking
A survey of survivability in multi-domain optical networks
Computer Communications
Differentiated quality of service in survivable WDM mesh networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
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In the emerging next-generation transport networks, called intelligent optical transport networks, DWDM-based optical components like add-drop multiplexers and optical cross connects will have full knowledge of the wavelengths in the network, status, and traffic carrying capacity of each wavelength. With such intelligence, these intelligent optical networks could create self-connecting and self-regulating connections on-the-fly. Because these networks carry huge volume of traffic, maintaining a high level of service availability at an acceptable level of overhead is an important and critical issue. It is essential to incorporate fault-tolerance into QoS requirements. Since the delay (response time) becomes unbounded as the load approaches the link capacity, delay is usually dominated by the most heavily loaded links; therefore algorithms must attempt to minimize the delay. In this paper, we take fault-tolerance, delay, bandwidth, and availability as QoS parameters to provide varying classes of services based on the type of primary and backup lightpaths and the number of backup lightpaths for studying the problem of dynamically establishing lightpaths in WDM optical networks. The type of primary and backup lightpaths determines the QoS parameters such as response time and bandwidth. Whereas, the number of backup lightpaths determines the level of fault-tolerance and availability of the connection. Based on the service classes, any connection in the network falls into one of the seven classes, viz. single dedicated primary and single dedicated backup, single dedicated primary and multiple dedicated backups, single dedicated primary and single shared backup, single shared primary and single shared backup, single shared primary and multiple shared backup, single dedicated multi-hop primary and single dedicated multi-hop backup, and single shared multi-hop primary and single shared multi-hop backup. We conduct extensive simulation experiments to compare and evaluate the effectiveness of different classes for varying network configurations-varying number of fibers, wavelengths on physical links, and different traffic patterns.