Itinerant Routing in Elastic Optical Networks

Routing, Spectrum, and Transponder Assignment (RSTA) in Elastic Optical Networks

Backbone networks are evolving toward Elastic Optical Network (EON) architecture that allows a flexible and efficient use of spectrum resources. Flexibility in EONs is guaranteed also by emerging sliceable bandwidth variable transponders (SBVTs) that support the simultaneous generation of multiple optical carriers. Such carriers can be used to serve different lightpaths (i.e., slice-ability), o...

Eecient Routing in Optical Networks

This paper studies the problems of dedicating routes to connections in optical networks. In optical networks, the vast bandwidth available in an optical ber is utilized by partitioning it into several channels, each at a diierent optical wavelength. A connection between two nodes is assigned a speciic wavelength, with the constraint that no two connections sharing a link in the network can be a...

Spectrum Defragmentation in Elastic Optical Networks

Elastic optical networks (EONs) provide fine bandwidth allocation granularity and enable scalable network management. In this paper, we review the strategies to alleviate spectrum fragmentation from both the preemptive and proactive perspectives. As for preemptive defragmentation, we investigate the characteristics of bandwidth fragmentation in EONs, and then discuss a fragmentation-aware routi...

Routing in Optical and Stochastic Networks Routing in Optical and Stochastic Networks

Virtual-Pod-Assisted Routing and Resource Assignment in Elastic All-Optical Switched Intra-Datacenter Networks

Service requests of intra-datacenter networks (intraDCNs) are different from traffic demands of traditional transport networks in the following features: 1) The latter is typically generated between dedicated node pairs that only require sufficient transmission bandwidth, i.e., frequency spectrum. IntraDCN service requests, in contrast, require IT resources, such as computational, memory and st...