A Multilayer Cost Model for Metro/Core Networks

Rambach, Franz; Konrad, Beate; Dembeck, Lars; Gebhard, Ulrich; Gunkel, Matthias; Quagliotti, Marco; Serra, Laura; López, Vı́ctor

doi:10.1364/jocn.5.000210

Cited by 135 publications

(92 citation statements)

References 4 publications

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“…But it is always mandatory having economics issues in mind in order to achieve a competitive cost scaling of any new resilience scheme. A recent collaborative capital expenditure model was accepted for near-term publication [119]. This detailed model is a key requirement to evaluate multilayer metro and core network architectures and their resilience approaches.…”

Section: General Technology Trend In the Communications Industry: Cosmentioning

confidence: 99%

Future research directions in design of reliable communication systems

et al. 2015

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In this position paper on reliable networks, we discuss new trends in the design of reliable communication systems. We focus on a wide range of research directions including protection against software failures as well as failures of communication systems equipment. In particular, we outline future research trends in software failure mitigation, reliability of wireless communications, robust optimization and network design, multilevel and multirealm network resilience, multiple criteria routing approaches in multilayer networks, resilience options of the fixed IP backbone network in the interplay with the optical layer survivability, reliability of cloud computing networks, and

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Section: General Technology Trend In the Communications Industry: Cosmentioning

confidence: 99%

Future research directions in design of reliable communication systems

et al. 2015

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“…Nevertheless, in general the terms cost and price are used interchangeably. The price points that are obtained from [3] are based on the assumption that 1 STRONGEST Cost Unit (SCU) corresponds with $4,000. …”

Section: Exemplary Ecmn Modelsmentioning

confidence: 99%

“…The ECMN model of this router is based on the electrical layer node building blocks as proposed by the authors of [3] an illustrated in Figure 2. These building blocks include the basic node which consists of the the physical and mechanical assembly, power supplies and cooling, the switch matrix, and control-and data plane software.…”

Section: A L3/2 Ip/mpls Routermentioning

confidence: 99%

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Towards faster techno-economic evaluation of network scenarios via a modular network equipment database

Naudts

Verbrugge

Colle

2015

2015 Conference of Telecommunication, Media and Internet Techno-Economics (CTTE)

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Abstract-Techno-economic analysis is used to evaluate technological solutions in different business environments via a simulation based approach. Four steps can be observed in techno-economic analysis: scope definition, modeling of costs and revenues, evaluation of the different solutions and refinement of the analysis. During the scoping step, the boundaries of the analysis are determined, the problem is divided into sub problems and a list of input values is collected. The collection of complete and precise inputs is of the greatest importance as faulty data leads to unreliable results (garbage in garbage out). Today, due to the lack of a structured way of sharing input values, inputs need to be collected on a case-by-case basis. Although a valid approach, it remains a time intensive process prone to errors. This paper therefore proposes a modular network equipment database containing a set of generic equipment such as an IP/MPLS router, a DWDM node, a fiber link and a twisted pair cable. Each of these is represented as a modular block model and described by a set of attributes and a set of drivers which are used to chain one network equipment's block model to one or more others. A complex network can as such be modeled as a chain of equipment block models which are determined by a set of drivers. As a consequence, the collection of inputs can be fast tracked, the problem of missing inputs can be partially resolved and cross-case comparison becomes possible. To make things more concrete, we illustrate this approach via the evaluation of a network scenario in which a network service provider expands its network with an extra core location.

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“…The costs of IP/MPLS routers, WSSs, OAs, and both, FTPs and BVTs is known [5]. To find the objective cost of SBVTs, we solved the IPoF problem for several values of f assuming that the cost of SBVTs is equal to that of the BVTs with the same capacity and compared solutions' CAPEX using equation (1).…”

Section: Ip/mpls-over-flexgrid Dimensioning (Ipof) Problemmentioning

confidence: 99%

Finding an Objective Cost for Sliceable Flexgrid Transponders

Velasco

Dios

López

et al. 2014

Optical Fiber Communication Conference

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Abstract:We analyze the objective cost of SBVTs as a function of the traffic conveyed by IP/MPLS-over-flexgrid networks. Optimal results show that cost increment with respect to BVTs is related to the aggregation level. IntroductionNational IP/MPLS networks receive IP traffic from access networks and perform aggregation and routing. To minimize the number of ports a router hierarchy consisting of edge routers performing aggregation and transit routers providing routing flexibility is typically created. In addition, a reduced number of interconnection routers support inter-operator connections. For efficiency and reach reasons, IP/MPLS networks are usually designed on top of optical networks [1]. The maturity of the flexgrid technology [2] providing fine spectral granularity makes bandwidth-variable optical cross-connects (BV-OXCs) based on that technology the candidates to be deployed in operators networks in the near future ( Fig. 1).To take advantage from the mix of optical connection (lightpath) bitrates that can be created on flexgrid networks, bandwidth-variable optical transponders (BVT) can be used. The main advantages of BVTs with respect fixed transponders (FTP) are: i) the used spectrum width is a function of the actual lightpath's bitrate and ii) procurement and inventory is simplified, thus reducing operational expenditures (OPEX). However, when the associated lightpath's bitrate is low, BVT's capacity is wasted, thus increasing capital expenditures (CAPEX). For instance, imagine a 400Gb/s BVT currently used for a 100Gb/s lightpath. Notwithstanding, to ensure that the network can support the traffic forecast for the years to come, deploying transponders with lower capacity might also involve increasing CAPEX to replace those transponders in the near future. The answer to that dilemma is sharing each BVT among several lightpaths, as proposed in [3]. A sliceable bandwidth-variable optical transponder (SBVT) is thus a BVT that can be shared by multiple (f) lightpaths.We assume that IP/MPLS routers are connected to wavelength selective switches (WSS) in the local BV-OXC, similarly to the architecture in [4]. Virtual topologies are created by connecting IP/MPLS routers among them through lightpaths established in the flexgrid optical layer. IP/MPLS routers are dimensioned considering two main parameters: forwarding capacity and number of slots available in the chassis, which limits the number of cards that can be installed. Since the bitrate of the MPLS flows resulting from aggregating IP client flows at edge routers is usually low, those routers are connected to few transit routers and BVTs or FTPs are usually preferred. However, the connectivity of transit routers among other transit and interconnection routers is usually high, creating an almost full-mesh virtual topology among them (Fig. 2). Therefore, SBVTs could provide advantages by reducing the number of cards to be installed on transit and interconnection routers, thus saving CAPEX since cheaper routers could need to be installed.In this paper, ...

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A Multilayer Cost Model for Metro/Core Networks

Cited by 135 publications

References 4 publications

Future research directions in design of reliable communication systems

Future research directions in design of reliable communication systems

Towards faster techno-economic evaluation of network scenarios via a modular network equipment database

Finding an Objective Cost for Sliceable Flexgrid Transponders

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