PCE Architecture for Flexible WSON enabling Dynamic Rerouting with Modulation Format Adaptation

Meloni, G.; Paolucci, F.; Sambo, N.; Cugini, F.; Secondini, Marco; Gerardi, L.; Potì, L.; Castoldi, P.

doi:10.1364/ecoc.2011.tu.5.k.3

Cited by 23 publications

(13 citation statements)

References 9 publications

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“…Among these efforts, those deserving to be pointed out are the, already mentioned in Section II, new DWDM grid developed within the ITU-T Study Group 15 by defining a set of nominal central frequencies, channel spacing, and the concept of frequency slot, that has led to defining a new GMPLS lambda label and its possible values format to support the flexible grid [80]; the OSPF-TE extension on collecting and flooding between nodes the available frequency ranges instead of the specific wavelengths [81]; the IETF draft defining the general framework for a GMPLS control plane of flexible optical network as well as a set of associated control plane requirements, i.e., describing the process of computing an RSA in GMPLS [27]; and the way that the PCE has to compute the routes according to the new constraints present in the flexible optical network such as the frequency slot and the width granularities, also discussed in [27].…”

Section: ) Standardization Activitiesmentioning

confidence: 99%

“…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%

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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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Section: ) Standardization Activitiesmentioning

confidence: 99%

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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“…A new dense WDM grid has been developed within the ITU-T Study Group 15 by defining a set of nominal central frequencies, channel spacing, and the concept of spectrum slice [61]. Moreover, extensions to the PCE communication protocol (PCEP) have been present in [62] to enable dynamic spectrum assignment and modulation format adoption.…”

Section: Control Plane For Elastic Networkingmentioning

confidence: 99%

Planning and Provisioning Strategies for Optical Core Networks

Muhammad

2015

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Optical communication networks are considered the main catalyst for the transformation of communication technology, and serve as the backbone of today's Internet. The inclusion of exciting technologies, such as, optical amplifiers, wavelength division multiplexing (WDM), and reconfigurable optical add/drop multiplexers (ROADM) in optical networks have made the cost of information transmission around the world negligible. However, to maintain the cost effectiveness for the growing bandwidth demand, facilitate faster provisioning, and provide richer sets of service functionality, optical networks must continue to evolve. With the proliferation of cloud computing the demand for a promptly responsive network has increased. Moreover, there are several applications, such as, real time multimedia services that can become realizable, depending on the achievable connection set-up time.Given the high bandwidth requirements and strict service level specifications (SLSs) of such applications, dynamic on-demand WDM networks are advocated as a first step in this evolution. SLSs are metrics of a service level agreement (SLA), which is a contract between a customer and network operator. Apart from the other candidate parameters, the set-up delay tolerance, and connection holding-time have been defined as metrics of SLA. Exploiting these SLA parameters for on-line provisioning strategies exhibits a good potential in improving the overall network blocking performance. However, in a scenario where connection requests are grouped in different service classes, the provisioning success rate might be unbalanced towards those connection requests with less stringent requirements, i.e., not all the connection requests are treated in a fair way.The first part of this thesis focuses on different scheduling strategies for promoting the requests belonging to smaller set-up delay tolerance service classes. The first part also addresses the problem of how to guarantee the signal quality and the fair provisioning of different service classes, where iii each class corresponds to a specified target of quality of transmission. Furthermore, for delay impatient applications the thesis proposes a provisioning approach, which employs the possibility to tolerate a slight degradation in quality of transmission during a small fraction of the holding-time.The next essential phase for scaling system capacity and satisfying the diverse customer demands is the introduction of flexibility in the underlying technology. In this context, the new optical transport networks, namely elastic optical networks (EON) are considered as a worthwhile solution to efficiently utilize the available spectrum resources. Similarly, space division multiplexing (SDM) is envisaged as a promising technology for the capacity expansion of future networks. Among the alternative for flexible nodes, the architecture on demand (AoD) node has the capability to dynamically adapt its composition according to the switching and processing needs of the network traffic.The second part o...

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“…Once the requested frequency resources are allocated on each link belonging to the routing path, the optical connection can be used to convey single-carrier (m-PSK, m-QAM) or multicarrier (O-OFDM) modulated signals [13]. Due to space limitations, we refer to some recent papers for more details on EON architectures [14], [15] and for reports on proofof-concept EON experiments [16], [17].…”

Section: B Network Architecturementioning

confidence: 99%

Offline RSA algorithms for elastic optical networks with dedicated path protection consideration

Klinkowski

Walkowiak

2012

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems

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In this article, we address the problem of static routing and spectrum allocation (RSA) in an elastic optical network (EON) with dedicated path protection (DPP) consideration. We formulate RSA-DPP as an Integer Linear Programming (ILP) problem. Since RSA is a difficult problem, we propose an Adaptive Frequency Assignment with Dedicated Path Protection (AFA-DPP) heuristic algorithm to provide near-optimal solutions to the problem. We investigate the efficiency of AFA-DPP for a set of network scenarios. Evaluation results show that the proposed algorithm outperforms other reference algorithms.

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PCE Architecture for Flexible WSON enabling Dynamic Rerouting with Modulation Format Adaptation

Cited by 23 publications

References 9 publications

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

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

Planning and Provisioning Strategies for Optical Core Networks

Offline RSA algorithms for elastic optical networks with dedicated path protection consideration

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