Routing and wavelength assignment in all-optical networks
IEEE/ACM Transactions on Networking (TON)
All-optical networks with sparse wavelength conversion
IEEE/ACM Transactions on Networking (TON)
Adaptive wavelength routing in all-optical networks
IEEE/ACM Transactions on Networking (TON)
Communications of the ACM
Provisioning algorithms for WDM optical networks
IEEE/ACM Transactions on Networking (TON)
RTSS '97 Proceedings of the 18th IEEE Real-Time Systems Symposium
Performance of Alternate Routing Methods in All--Optical Switching Networks
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
Distributed network control for wavelength routed optical networks
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 1
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Performance of WDM transport networks
IEEE Journal on Selected Areas in Communications
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Optical networks employing wavelength division multiplexing (WDM) and wavelength routing are a potential candidate for future wide-area networks. As these networks are prone to component failures and they carry a large volume of traffic, providing fault tolerance capability to them is an important issue. This paper considers the problem of establishing dependable connections (D-connections) in wavelength-routed wavelength-division multiplexed networks with dynamic traffic demands. We call a connection with fault-tolerant requirements as a D-connection. We recommend using the pro-active approach wherein a D-connection is identified with the establishment of the primary lightpath and a backup lightpath at the time of honoring the request. Upon occurrence of a fault, a failed connection finds its backup path readily available. We develop algorithms to select routes and wavelengths to establish D-connections with improved blocking performance. These algorithms differ in their performance and computational complexity. The algorithms use backup multiplexing technique to efficiently utilize the wavelength channels. To improve fairness between dependable and non-dependable connections, we propose a method called backup threshold. We conduct extensive simulation experiments on different networks to verify the effectiveness of the proposed algorithms.