Introduction the demand for fiber optic network infrastructure continues to grow as organizations position themselves and their communities for future growth. Optical transport network otn layers the optical transport hierarchy oth is a new transport technology for optical transport networks developed by the itu. Architectures and classification of access networks. Network intelligence is your source for expertise and opinions on everything affecting service providers today and in the future. And oduflex a futureproof solution for otn client mapping pdf. Transport network requirements and architecture for 5g. Optical transport network architectures are evolving to. This white paper provides a tutorial overview of otn, with primary. The optical transport network otn architecture is specified in itut rec.
Optical access networks passive optical networks pons are emerging as the ultimate solution for high speed access networks. A key enabler of the 5gxhaul data plane figure 1 is the hybrid passiveactive optical network transport. The role of optical networks optical network segments are categorized with respect to the size of the area they cover. Optical transport use cases open networking foundation. One way of describing the metropolitan area network man would be to say that it is neither the longhaul nor the access parts of the network, but the area that lies between those two see figure 11.
Packet optical transport platform potp 7100 7100 7100 7100 7100 dwdmroadm 88 wavelengths 1150 core to access optical networking architecture for defense and civilian government entities figure 1. In case of fixed transponders, the signal coming from the client can only be converted in a certain optical frequency, however, in the case of adaptable transponders, client signals. 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. Fronthaul network solutions for the cran architecture a variety of fronthaul network technologies can be used in the cran architecture. Figure 14 shows the overall frame format for an otuk signal. Optical transport network architecture, pdf, print, email. Flexible architectures for optical transport nodes and networks. Network planning and cost analysis for optical transport. Core to access optical networking architecture for defense. Osa field trial of bandwidth on demand services based on. A lightpath is simply a high bandwidth pipe, carrying data at up to several gigabitssecond. A pon consists of an optical line terminal olt at the service providers central office and a number of optical network units onus near end users. This recommendation defines the requirements for the transport of optical transport module of order n otm n signals of the optical transport network, in terms of.
Architecture of optical transport networks in force prepublished superseded and withdrawn components. Downstream signals are broadcast to all premises sharing a single fiber encryption is used to prevent eavesdropping. Pdf provides a 12channel interface, also using the optical mpo connector. Bus topology figure below shows a generalised bus topology network.
Pointtomultipoint, fiber to the premises network architecture in which unpowered optical splitters are used to enable a single optical fiber to serve multiple premises, typically 16128. Remembering that reach is a key issue for optical networks, one issue with 10g, and larger, network modulation is that the transport spectrum is wider than for 2. Abstract data center networks dcns form the backbone in. White paper on technological developments of optical. Longhaul core networks, also known as wide area networks wan or. In addition to telecommunication companies, utilities and transportation agencies realize the benefits of installing a fiber network. To support these new applications in an efficient manner, the underlying mobile transport. This allinone, nextgeneration product provides device management, network provisioning, and network assurance across core, edge, aggregation, and access networks. An one may retime, reamplify, reshape but it does not have to be 3r it can be purely photonic. Comparing wavelengthswitched and digitallyswitched optical transport architectures. A practical perspective by rajiv ramaswami and kumar n. A few of the most important reasons for migrating to the optical layer are described in this module. The bus is a high bandwidth optical fibre which traverses the entire distribution area. Pdf this paper presents a roadmap of progress in the area of optical networking as encountered in the.
It is based on the network architecture defined in itu g. Fronthaul transport networks fronthaul transport nodes ftn carry cpri and ecpri traffic initially cpri and ecpri carried over separate wavelengths or fiber future. Simple optical network architectures broadcast and distribution networks. Based on a unique combination of microwave, ip router and integrated optical solutions, our mobile transport solutions deliver the capacity, ultralow latency and layer 3 capability needed to build, scale and service 5g everywhere. Development of a transport network architecture model, version 1. Data communication and computer network 6 wan may use advanced technologies such as asynchronous transfer mode atm, frame relay, and synchronous optical network sonet. The traditional access fiber architecture has been the fiber remote, which is a highspeed fiber trunk sonet or ethernet that terminates in an electro. Technology and architecture trends in optical networking 2003 ieee distinguished lecturer talk telcordia contact. Fractions of the optical power on the bus aretapped off to provide a signal to each subscriber. The network offers lightpaths between pairs of network nodes. Optical transport network architecture pdf download. White paper on technological developments and trends of optical networks 1 recent advances in optical networking.
The otn irdi interfaces are defined with 3r processing at each end of the interface. Carrier service networks are generally composed of multilayer network resources, as shown in fig. Itut defines an optical transport network as 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. The actors may be human, but they are often software entities or organizational entities. Cpri and ecpri carried over same wavelengthfiber necessitates radio over ethernet roeieee 1914. 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. It is based on the network architecture defined in various recommendations e. Sdnbased optical networks effectively support the slicing and intelligent operation of 5g networks otn key technologies in 5g bearer network summary. It is fully managed, configured and monitored remotely as part of the network, via fmt management software, and incorporates several types of. A pon configuration reduces the amount of fiber and central office equipment required compared with pointtopoint architectures. Containers in sdh and odus in otn optical transport network are.
Otn a nextgeneration network architecture is a network layer in which switches and routers have integrated optical interfaces and are connected directly to equipments at the optical layer, such. Wdm wavelength division multiplexing networks using otn optical transport networks technology for incoming static or dynamic traf. Jun 12, 2012 comparing wavelengthswitched and digitallyswitched optical transport architectures. Fiber capacity the first implementation of what has emerged as the optical network began on routes that were fiber limited. The optical transport network otn system is structured in layered networks. A passive optical network is a form of fiberoptic access network. Lans and wans can be interconnected via t1 or t3 digital leased linesaccording to the protocols involved, networks interconnection is achieved using one or several of the following devices. The aim of the optical transport network otn is to combine the. Allfiber components are ideal for passive optical networks because of many inherent advantages such as low forward and return losses and high power handling capability. 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. Sdh enables network providers to react quickly and easily to their customers. Epn manager provides endtoend network management of carrier ethernet, optical transport, and circuit emulation over packet networks. This is a very simplified figure, as operations take place on an abstracted view of the physical resources, which has not been illustrated. Our content includes customer case studies, industry insights, and howto blogs on topics such as 5g, virtualization, mass scale networking, services and security.
Dwdm deployment also came with a completely new set of network elements ne, including optical amplifiers, switches, multiplexers, demultiplexers, all of which introduced a sublayer into the network warranting constant monitoring to guarantee faultfree traffic. In this way, multivendor and multidomain interoperability is achieved for transport. A solution based on extended openflow is proposed to support the control virtual network interface in otn networks. Edgeregional metro networks, also known as metropolitan area network man or. An adtran white paper 4glte mobile backhaul reference. Tellabs optical lan high availability solution with industryleading network uptime introduction government entities, both defense and civilian. Pdf roadmap on optical transport network technologies.
The otn layer evolved over layer1 of the dwdm network for enabling more efficient convergence of traditional sonetsdh transport and new data services, into a common optical transport network layer. Otn provides the network management functionality of sdh. The optical transport network architecture as specified in itut g. Pdf this paper discusses the prospects of and challenges facing the next.
Gigabit passive optical network gpon tdm architecture, 2. The optical transport network otn and wdm layers make up a generic layer1 transport network, enabling different service types to coexist and. A control mechanism for multidomain optical networks with commercial optical transport network otn equipment is demonstrated by using hierarchical software defined networking controllers. Mobile transport to support 5g and lte everywhere ericsson. The optical transport network otn standards, defined by the itut g. In the area of transport network architecture, a revised recommendation g.
Otwg optical transport working group ops optical physical section oui organizationally unique identifier ots optical transmission section tcm tandem connection monitoring otu optical channel transport unit tdm time division multiplexing tti trail trace identifier 2 initial extensions to openflowswitch protocol. Forecast to industry 2017 defense information systems agency. Network otn is composed of a set of optical network elements connected by optical fibre links, able to provide functionality of transport, multiplexing, routing, management, supervision and. Towards a datafriendly public transport network recent standardized techniques to enhance sonetsdh networks yvirtual concatenation vc.
Propagation of a signal through a fiber how does anoptical signal move throughafiber network. Routing in optical networks, multilayer networks, and overlay networks. Flexible virtualized optical transport networking technology ntt. Optical transport networking fs otn solution is designed to costeffectively extend the optical link power budget for wdm solutions. Using the planning tool, a study was conducted to analyze three routing strategies and four. Open networking foundation optical transport use cases. Also commonly called digital wrapper, otnor optical transport networking is a nextgeneration, industrystandard protocol that provides an efficient and globally accepted way to multiplex different services onto optical light paths. Typical mobile network architecture with mobile backhaul network portion highlighted. Optical transport network otn solution guide optical transport network otn solution guide the otn solution is designed for highly effective mapping of different protocols and rates into the same uplink, providing simpler, transparent, high bandwidth capabilities at a comparatively low cost. Northwestern university, yuiuc, znec labs america, inc.
The optical transport hierarchy oth is a new transport technology for the optical transport network otn developed by the itu. Optical transport network architecture pdf this document provides a tutorial for optical transport network standards and their. Optical transport network an overview sciencedirect topics. Technology and architecture trends in optical networking. Due to the large number of possible scenarios and use cases for mtc, it is dif. Optical transport hierarchy oth, frame structure and bit rates functionality of the overhead in support of multiwavelength optical networks formats for mapping client. They introduce potentially new challenges which might go beyond the pure connectivity. Dcs nideag metro network mplsethernet ipmpls csr core csr bsc msc mme pdsn sgw metrocellmicrocell nxt1e1, ds3, oc3. Compared with the 4g network architecture, the 5g network architecture has the following changes.
In the following, we present a few examples coming from a selected. Therefore, in this paper, we exploit different optical transport network architectures and technologies that can be used to build an efficient fronthaul network for 5g, in order to carry data. Figure 5 shows the elements that make up an sdh network. Fronthaul network solutions for the cran architecture a variety of fronthaul network technologies can be used in the cran. This document provides a single reference and progress update for the development of the transport network architecture framework by asa.
In this project we implement the otn framer, when our main goal is data. Key technologies in open optical transmission systems. Optical transport networks enhanced hierarchy standards. Public consultation abstract the 5g architecture working group as part of the 5g ppp initiative is looking at capturing novel trends and key technological enablers for the realization of the 5g architecture. However, this percentage had increased to 33% by 2016. With the evolution towards ipbased network, the circuit switched network is migrating towards a new architecture called next generation network ngn which emulates the behavior of circuit switching. Pdf this paper presents a roadmap of progress in the area of optical networking as encountered in the area of. Example of two controllers managing their respective physical nes. Internetwork a network of networks is called an internetwork, or simply the internet. Signal format independent and degradationfree optical path identifier based on sop. White paper on technological developments of optical networks. Itut defines an optical transport network otn as a set of optical network.
A practical vision for optical transport networking electrical and. Advanced defense switched network integrated mgmt spt sys transport network basg building automation systemglobal bdp big data platform ccv common communications vehicle cems converged element management system cno cybernetops csaac cyber situational awareness analytical capabilities dcn data communications network dco defensive cyber operations. Optical network drivers many factors are driving the need for optical networks. Telecommunications network and service architectures. A demonstration usecase of an openflowenabled optical virtual switch implementation managing a small optical transport network for. Nextgeneration optical transport networks viavi solutions. A use case describes the actions taken by a hypothetical set of actors as they work to achieve a goal.
The disadvantage is that the equipment cost is relatively higher, and a low cost solution needs to be developed. The purpose of this document is to define the architecture of an optical layer, realized by deploying a multiwavelength meshconnected optical network. Advances in transport technology, optical components, and optical. Optical signals propagate through the core using a series of total internal reflections. This tool was also extended to support three multiperiod planning approaches. Key technologies in open optical transmission systems issue 01 date 20170321. Extend your network to connect your other business locations or data centers in a metro area or long haul with our wavelength service. This revision updated the otn architecurr to support the interfaces beyond 100 gbps i.
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