A practical vision for optical transport networking. The horizons of optical networks are much more than high speed physical layer transport. In contrast to the transparent network, the opaque network performs a 3r regeneration at each node in the network. Architecture of optical transport networks in force prepublished superseded and withdrawn components. Otn was designed to provide support for optical networking using wavelengthdivision multiplexing wdm unlike its predecessor sonetsdh itut recommendation g. It delivers guaranteed subwavelength and multigranular network services without wavelength conversion, timeslice. Transport operational model addresses growth in packet traffic and services service flexibility p2p private lines, video transport, multipoint, best effort traffic as wells as legacy services sonetsdh like sla and oam with granular bw provisioning high network utilization of transport network.
Gigabit passive optical network gpon tdm architecture, 2. Software defined networking is a new architecture that has been designed to enable more agile and. Itut defines an optical transport network otn as a set of optical network elements one connected by optical fiber links, able to provide functionality of transport, multiplexing, switching, management, supervision and survivability of optical channels carrying client signals. Paul goransson, chuck black, in software defined networks, 2014. Transport network requirements and architecture for 5g. The adoption of optical transport network otn technology continues to gain momentum in. The opticalwavelength division multiplexing wdm layer forms the physical transport medium providing sheer bandwidth. Optical transport networks training by tonex provides a comprehensive technical introduction to optical transport networks. This paper proposes an architecture for software defined optical transport networks. White paper open optical transformation introduction navigating the transition from todays proprietary optical networks towards an open, automated network architecture is now within the reach of service providers. Optical transport networks are composed of a set of optical network elements connected by optical fibre links to provide functionality of transport, multiplexing, routing, management, supervision and survivability of optical channels carrying client signals. We note that 80 percent of delay on the transport network depends on the fiber distance, so shortening the distance between the core network and the user is the best way to reduce delay. Optical transport network an overview sciencedirect topics.
Otn facilitates efficient use of dwdm capacity by ensuring consistent fill rates across a network using otn switches at fiber junctions. The otn standards have been evolving within the itu since the early 90s, and most recently have been completely revised with respect to a standardsbased transport for carrier. Architecture for autonomic optical transport networks ifip digital. A roadmap for transport network modernization cisco. Extend your network to connect your other business locations or data centers in a metro area or long haul with our wavelength service. Optical transport use cases open networking foundation.
This course provides an indepth introduction to the terminology and technology that will comprise tomorrows optical transport networks. The optical layer provides lightpaths to other layers such as the sonetsdh, ipmpls, and ethernet layers, as well as the electronic layer of the optical transport network otn, which includes the the optical channel transport unit otu and optical channel data unit odu sublayers see section 6. Pdf this paper presents a roadmap of progress in the area of optical. Although much of the infrastructure in your optical transport networks is working, and innovations continue, major problems within your legacy sonetsdh network architecture have become a significant barrier to business growth. The optical transport network otn functionality is described from a network level viewpoint, taking into account an optical network layered structure, client. Alsaadid abstract since the proposal of a fast learning algorithm for deep belief networks in 2006, the deep learning techniques. As illustrated in figure 1, a data center contains a number of servers, where the applications are hosted.
This adopts a hybrid approach combining a dynamic and elastic frame based optical network solution with enhanced capacity wdm pons 7, to support the increased transport requirements of 5g environments in terms. Network slicing cn, policy vnf cn, policy vnf cn, policy vnf 2g, 3g, 4g slice nbiot, ltem slice wifi slice fixed line slice vnf vcpe interorchestration system interface potentially multiple other network slices per network customer one or more 5g slice per enterprise customer mec ran, cn. A practical vision for optical transport networks one that is widely deployable, highly reliable and maintainable, readily evolvable, and demonstrably cost effective is now at hand. A point to note, however, is that currently no management capabilities exist for dealing with optical signals that have not been converted to digital format. Introduction to dwdm technology ol088401 preface this introduction to dwdm technology is intended for readers who want to gain a basic understanding of dense wavelength division multiplexing dwdm technology and its role in metropolitan area networks mans. Revised 1 a survey of deep neural network architectures and. Pdf optical transport networks otn technology and test. Figure 1 data center interconnect, alloptical network. They transmit bits using various encoding and multiplexing techniques. It is aimed at personnel associated with the telecommunications industry, who would like a good understanding of the technology involved and who require a sdhsonet and dwdm refresher.
An optical transport network otn is an interconnection of optical switches and optical fiber links. Dec 12, 2018 5g brings the promise of new applications enabled by lowlatency and 10x higher wireless connectivity. Revised 1 a survey of deep neural network architectures and their applications weibo liua, zidong wanga, xiaohui liua, nianyin zengb, yurong liuc,d and fuad e. The bus is a high bandwidth optical fibre which traverses the entire distribution area. To support these new applications in an efficient manner, the underlying mobile transport. Pdf an optical sdn controller for transport network. The otn standards have been evolving within the itu since the early 90s, and most recently have been completely revised with respect to a standards. Most service providers would agree that current and future optical transport services can be most efficiently supported over optical transport network otn architecture. This paper lays out this practical vision, placing it in context with other networking trends. With multiple clients transported on a single wavelength, otn provides an economical mechanism to fill optical network wavelengths. It is based on the network architecture defined in itu g.
Contents iv introduction to dwdm technology ol088401 optical fibers 26 how fiber works 26 multimode and singlemode fiber 27 singlemode fiber designs 28 transmission challenges 29 attenuation 29 dispersion 210 summary 212 light sources and detectors 2 light emittersleds and lasers 2 itu grid 214 light detectors 215 optical amplifiers 216 erbiumdoped fiber. The role of optical networks optical network segments are categorized with respect to the size of the area they cover. A set of optical network elements connected by optical fiber links, able to provide functionality of transport, multiplexing, switching, management, supervision and survivability of optical channels carrying client signals. Direct control of optical components in enterprise networks. Deploying a fiber optic physical infrastructure within a converged plantwide ethernet architecture fiber optic cabling systems overview figure 3 permanent link diagram the typical channel is composed of multiple assemblies connected by a combination of the optical fiber connectors on the cable assemblies ma ting into adapters. Example of two controllers managing their respective physical nes. Deploying a fiber optic physical infrastructure within a. An one may retime, reamplify, reshape but it does not have to be 3r it can be purely photonic. Network requirements and architectural framework of the optical transport network family of recommenda tions.
Advances in transport technology, optical components, and optical. The optical transport network otn is evolving fast a transformation, in fact, that renders the term. With the appropriate software tools to fully exploit the benefits of flexible coherent modems, programmable photonics and flexible grid systems, the redefined optical network. The optical transport network otn architecture is specified in. The sdn controller includes a network abstraction layer allowing the implementation of cognitive controls and. Overview of optical networks the network as a cloud of information flows connecting different participants. In summary, optical transport networking has come of age. Disaster recovery from customer premise disaster recovery solutions for customer premises or that of any thirdparty provider, minimize downtime and deliver costeffective levels of resiliency for mission. Otn is an industrystandard optical transport protocol itu g. Jun 12, 2012 comparing wavelengthswitched and digitallyswitched optical transport architectures. The rise of open standards, apis and opensource reference platforms has accelerated innovation to drive more. The promise of the optical transport network otn is designed to address these issues by delivering a transparent framework to efficiently carry diverse traffic types. Fractions of the optical power on the bus aretapped off to provide a signal to each subscriber. Attribute tdm transport packet data network connection mode connection oriented connectionless except te oam inband oam outofband except pw, te protection switching data plane switching control plane dependency bw efficiency fixed bandwidth statistical multiplexing data rate granularity rigid sonet hierarchy flexible data rate qos one class only qos treatment.
Public consultation 5g ppp architecture working group view on 5g architecture version 3. Simplifies network management, minimizes operational costs 10gbe specifies full duplex operation and optical fiber transmission medium 10gbe media types. Wavelength service intercity architecture centurylink. As optical networks become increasingly flexible and softwaredriven, network operators need to rethink past assumptions as they plan and deploy networks moving forward. Optical transport networks training otn training course. According to different service requirements, fiberoptic cable availability and network resource allocations, ran real time and nonreal time resources can be deployed on the site or on the access cloud side. Seamless transport of ethernet frames across entire network. As a consequence, a traditional service provider network architecture is built of multiple layers. Interfaces for the optical transport network otn and. The optical transport hierarchy oth is a new transport technology for the optical transport network otn developed by the itu. A survey of deep neural network architectures and their applications weibo liua, zidong wanga, xiaohui liua, nianyin zengb, yurong liuc,d and fuad e. Optical transport use cases optical transport working group. Comparing wavelengthswitched and digitallyswitched optical transport architectures. Abhinava sadasivarao, sanjoy bardhan, sharfuddin syed, biao lu and loukas.
Longhaul core networks, also known as wide area networks wan or interchange carrier ixc public networks. Draw architecture of optical transport networks otns and. White paper optical transport networks otn test by reza vaezghaemi. Tson proposes a flexible and tunable timewavelength assignment along with oneway treebased reservation and node architecture. The traditional network architecture consists of multiple layers. There are multiple options on functional split how the ran can be disaggregated into. This is a very simplified figure, as operations take place on an abstracted view of the physical resources, which has not been illustrated. Pdf roadmap on optical transport network technologies.
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