Lightpath provisioning in wavelength switched optical networks with flexible grid

Sambo, N.; Cugini, F.; Bottari, G.; Bruno, Gianmarco; Iovanna, Paola; Castoldi, P.

doi:10.1364/ecoc.2011.we.10.p1.96

Cited by 19 publications

(9 citation statements)

References 4 publications

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“…The multi-class nature of the spectrum allocation problem has already been addressed in various studies. The reference [27] proposes the FF-LF (First Fit or Last Fit) policy where high modulation format connections use FF for spectrum allocation; otherwise LF policy is used allocating resources from the high end of the spectrum. A similar SA policy is proposed in [28] where individual classes are further classified using a threshold-based classifier into two super-classes, namely high data rate and low data rate super-classes, and FF (LF) is used for requests of low (high) data rate super-classes.…”

Section: Introductionmentioning

confidence: 99%

Class-based first-fit spectrum allocation with fragmentation avoidance for dynamic flexgrid optical networks

Yumer

Akar

Karasan

2015

Optical Switching and Networking

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A novel Class-Based First Fit (CBFF) spectrum allocation policy is proposed for dynamic flexgrid optical networks. The effectiveness of the proposed CBFF policy is compared against the First Fit (FF) policy for singlelink and network scenarios. Throughput is shown to be consistently improved under the proposed CBFF policy with throughput gains of up to 15%, compared with the FF policy for the network scenarios we studied. The reduction in bandwidth blocking probability with CBFF with respect to FF increases as the link capacities increase. Throughput gains of CBFF compared with FF are more significant under alternate routing as opposed to fixed routing.

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Section: Introductionmentioning

confidence: 99%

Class-based first-fit spectrum allocation with fragmentation avoidance for dynamic flexgrid optical networks

Yumer

Akar

Karasan

2015

Optical Switching and Networking

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“…2) Innovative GMPLS/PCE Extensions: Beside the standardization initiatives, a number of other studies have addressed the issue of the design of GMPLS-based control plane for flexible optical networks, for instance, [3], [16], [17], [19], [69], and [81]. The majority of the proposals concern methods to efficiently aggregate resource information and execute RSA algorithms in GMPLS/PCE suite.…”

Section: ) Standardization Activitiesmentioning

confidence: 99%

A tutorial on the flexible optical networking paradigm: State of the art, trends, and research challenges

et al. 2014

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| Rigid fixed-grid wavelength division multiplexing (WDM) optical networks can no longer keep up with the emerging bandwidth-hungry and highly dynamic services in an efficient manner. As the available spectrum in optical fibers becomes occupied and is approaching fundamental limits, the research community has focused on seeking more advanced optical transmission and networking solutions that utilize the available bandwidth more effectively. To this end, the flexible/ elastic optical networking paradigm has emerged as a way to offer efficient use of the available optical resources. In this work, we provide a comprehensive view of the different pieces composing the ''flexible networking puzzle'' with special attention given to capturing the occurring interactions between different research fields. Only when these interrelations are clearly defined, an optimal network-wide solution can be offered. Physical layer technological aspects, network optimization for flexible networks, and control plane aspects are examined. Furthermore, future research directions and open issues are discussed.

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“…The modulation format and the spectrum position can be adjusted, leading to greater efficiencies in terms of network resources. In [27] an effective lightpath provisioning scheme is proposed for path computation element (PCE) based optical networks assuming a flexible grid. It is shown that 12.5 GHz spacing is satisfactory to guarantee efficient network resource utilization for the expected modulation formats at 400 Gb/s.…”

Section: Control Plane For Flexible Optical Networkmentioning

confidence: 99%

A survey of recent developments on flexible/elastic optical networking

Tomkos

Palkopoulou

Angelou

2012

2012 14th International Conference on Transparent Optical Networks (ICTON)

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There is a growing awareness that the utilized bandwidth of deployed optical fiber is rapidly approaching its maximum limit. Given the possibility for such capacity crunch, the research community has focused on seeking solutions that make the most out of the scarce network resources (such as the fiber bandwidth) and allow accommodating the ever-increasing traffic demands. In such context, new spectrum efficient optical networking techniques have been introduced as a way to offer efficient utilization of the available optical resources. "Flexible", "elastic", "tunable", "gridless" or "adaptive" are few examples of the terms used in literature to describe solutions that migrate from the fixed WDM single line rate systems to systems that provide support for the most efficient bandwidth utilization. In this paper, we review the recent developments on the research topic of flexible/elastic networking and we highlight the future research challenges.

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Lightpath provisioning in wavelength switched optical networks with flexible grid

Cited by 19 publications

References 4 publications

Class-based first-fit spectrum allocation with fragmentation avoidance for dynamic flexgrid optical networks

Class-based first-fit spectrum allocation with fragmentation avoidance for dynamic flexgrid optical networks

A tutorial on the flexible optical networking paradigm: State of the art, trends, and research challenges

A survey of recent developments on flexible/elastic optical networking

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