A novel approach of backup path reservation for survivable high-speed networks
IEEE Communications Magazine
Optical switching technology comparison: optical MEMS vs. other technologies
IEEE Communications Magazine
WDM optical communication networks: progress and challenges
IEEE Journal on Selected Areas in Communications
A balancing scheme for QoS-aware service provisioning in OPS networks
Photonic Network Communications
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A Service Level Agreement (SLA) typically specifies the availability a Service Provider (SP) promises to a customer. Current schemes usually employ backup resources to achieve high SLA satisfaction. We propose a new provisioning framework, called Service Cluster (SC), which uses no explicit backup resources. By grouping several services with (typically) different availability specifications, an SC can dynamically reallocate resources to avoid SLA violations. Services that can tolerate additional down time lend resources to services that need to be kept running. We first analyze a condition for admission control. We then propose a dynamic resource allocation scheme (ADT1 Balancing Scheme, SC-ABS) and apply it to the SC framework. The dynamic management of SC-ABS is realized by novel SLA-violation estimation in an event-driven manner without continuous monitoring. We compare SC-ABS with Shared-Path Protection, and numerically show its various advantages in terms of: 1) higher SLA satisfaction (up to 30% more); 2) lower service blocking ratio; 3) higher tolerance of failures; 4) more balanced SLA satisfaction; and 5) consuming no explicit backup (or standby) resources. Our scheme can meet the SLA of significantly more services than protection-based schemes, thus providing more profit for the SP and lower cost for the customer.