Differentiated-resilience provisioning of service level agreements for the GMPLS/ASON networks

In the next generation optical networks, GMPLS-based ASON networks, operators will be required to support a wide variety of applications each having their own requirements. These requirements are contracted by means of the service level agreement (SLA). This paper describes an O-SLA provisioning framework and architecture of four Planes oriented service that may be included in the SLA contract between operators and customers in order to provide the required level of configuration actions. This article proposes vertical service mapping and differentiated-resilience provisioning schemes of SLA applied to the GMPLS/ASON networks, which is expected to be the near-and long-term network technology thanks, among other things, to the great bandwidth capacity offered by optical devices. After an exposition of the rationale behind an optical SLA, parameters that could be included in this O-SLA, as well as their values for five classes of services, a classification of optical services according to their resilience requirement is proposed. Our numerical results show that the differentiated resilience scenario has better performance than that of dedicated and shared protection and received connections in the differentiated-resilience are 31% higher than that of shared protection and are 60% higher than that of dedicated protection.