Distributed Quality of Service Based Provisioning Framework for Survivable Optical Networks

Distributed Quality of Service Based Provisioning Framework for Survivable Optical Networks

Emad M. Al Sukhni (University of Ottawa, Canada) and Hussein T. Mouftah (University of Ottawa, Canada)
DOI: 10.4018/978-1-61350-426-0.ch011
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This chapter provides new distributed frameworks to support Quality of Service (QoS) differentiation. These frameworks provide differentiated protection services to meet customers’ availability requirements effectively. We describe the availability-analysis for connections with different protection schemes. Through this analysis, we show how connection availability is affected by resource sharing. Based on the availability analysis, the proposed framework provisions each connection in which an appropriate level of protection is provided according to its predefined availability requirement. We consider the networks without wavelength conversion capability as well as dynamic traffic environment. In these distributed frameworks we propose several distributed schemes to provision and manage connections cost-effectively while satisfying the existing and new connections availability requirements.
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Quality Of Service In Optical Networks

A WDM mesh network may provide different services for customers. The QoS requirements for these services can be different because of their diverse needs of the customers; banking services, on-line trading, and military applications demand high QoS levels, while IP best-effort packet-delivery service may be satisfied with lower QoS levels. Naturally, how to provide a certain QoS per customer requirement and how to guarantee the service qualities become a critical need for the network operators as well as for the customers (Ho et al.,2007 and Zhang et al.,2007). Service availability, service reliability, and restoration time are important QoS parameters in lightpath provisioning in optical networks. As one of the QoS parameter, Service availability is the main focus of This Chapter.

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