The optical transport network otn architecture is specified in. Often, operators attempt to address the capexopex quest by converging a number of functions onto a single network element. Optical transport network otn is a series of standards created to combine the benefits of sonetsdh with the bandwidthexpanding capabilities of dense wave division multiplexing dwdm in order to build more network functionality into optical networks. All in all, the charming of the otn can be translated into two words. The successor of sonetsdh has been launched in early 2002 and standardized by itut as the otn optical transport network. Understanding optical transport network otn to cvtdallas. Optical transport networks otn see the whit e paper a tutorial on itut g. Sonetsdh standard was carry telephone speech, and it took many adaptations for the transport of frames and type of ip packets, atm, or others. The optical transport network otn the aim of the optical transport network otn is to combine the benefits of sonetsdh technology with the bandwidth expandability of dwdm. Cisco ngn transport solutions cisco global home page. Enhancing sonetsdh networks for data transport synchronous optical network sonet and synchronous. This white paper provides a tutorial overview of otn, with primary emphasis on itut g. As of december 2009, otn has standardized the following line rates. The physical layer of the optical transport network otn is the weakest layer in the network, as anyone can access the optical cables from any.
Application note flexible optical transport network otn. Otn is a digital wrapper that provides an efficient and globallyaccepted way to multiplex different services onto optical light paths. These nes are able to provide functions such as transport, multiplexing, routing, management, supervision, and protection survivability of client signals, according to the requirements specified in rec. Cisco visual networking indexforecast, 20072012 mobile data to grow at 125% cagr 20072012 with video, consumer ip quadruples by 2012 requirements. Optical transport networks training otn training course. Its role is to channel packages on routes to 2,5, 10 and 40 gbits. The optical transport network otn standards, defined by the itut g. Optical transport network otn primer searchnetworking. It is based on the network architecture defined in itu g.
As we known, the core of most current operator networks is the asynchronous digital hierarchy synchronous optical network sdhsonet, which has always offered good fault management, performance monitoring, predictable latency, a protection mechanism and, of course, synchronization. Optical transport network otn is a protocol for sending network messaging over optical fiber networks. Optical transport network otn fujitsu united states. Optical transport networks have been migrating from sonet technology to. In future networking, high speed transmission is no doubt the migration trend. In 2012, half a zettabyte will cross the global network impact on the network. 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.
Itut defines an optical transport network otn as a set of optical network. A multilayer network topology architecture of ipmpls over otn optical transport networks over dwdm has been receiving significant attention in large isps networks. Otn was designed to provide support for optical networking using wavelengthdivision multiplexing wdm unlike its predecessor sonetsdh. Cisco ncs 4000 optical transport network otn line cards. Cisco ncs 4000 optical transport network otn line cards data sheet.
The optical transport network otn, as the underlying infrastructure network of networks should be capable of transporting a wide variety of client signals, independent of their format. Optical transport network an overview sciencedirect topics. Pdf optical transport network otn tutorial disclaimer. As defined by the international telecommunication union itu, otn is a set of optical network elements connected by optical fiber links. An optical transport network refers to a series of standards created to combine the benefits of sonetsdh with the bandwidthexpanding capabilities of dwdm in order to build more network. In transmission systems, the framing bytes delineate g. This video describes what was the need for adopting otn optical transport network and the benifits. The optical transport network otn architecture is specified in itut rec. This instructorled training event guides participants through the migration from sdh transport technologies to optical transport network otn technologies. Optical transport networking otn, as shown in the following figure, represents a natural next step in the evolution of transport networking. In this project we implement the otn framer, when our main goal is data.
Optical transport network otn for high speed service. Optical transport networks training by tonex provides a comprehensive technical introduction to optical transport networks. Otn is an industrystandard optical transport protocol itu g. Otn optical transport network otn an otn network is composed of a set of optical nes connected by optical fiber links. Optical transport networks training tutorial course. Interfaces for the optical transport network otn superseded. Experts define otn as a collection of optical network elements one that communicate using wavelength division multiplexing wdm. Application note flexible optical transport network otn access up to 100g a transition is occurring in optical transport networking as network operators move from using otn solely as a digital wrapper for enhanced dense wavelength division multiplexing dwdm performance to using it as a switching mechanism for the next. Inspired by the sonetsdh network, itut itu telecommunication standardization sector has defined the optical transport.
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. The optical transport network otn technology introduces such a solution. The optical transport network otn and wdm layers make up a generic layer1 transport network, enabling different service types to coexist and. The optical transport network otn defined in itut g. From a highlevel architectural perspective, one would not expect otn architectures. With multiple clients transported on a single wavelength, otn provides an economical mechanism to fill optical network wavelengths. Otn was designed to provide support for optical networking using wavelengthdivision multiplexing wdm unlike its predecessor sonetsdh itut recommendation g. Optical transport networks training course handson. Nowadays, the sonetsdh network is an universal network that combines with wdm wavelength division multiplexing technique to transmit multiple optical signals over a single fiber. In case of conflict between the material contained in the tutorial and the material. The aim of the optical transport network otn is to combine the benefits of sonetsdh technology with the bandwidth expandability of dwdm. In the transport core, bandwidth requirements spawned the creation of the optical transport network otn described in general terms in international telecommunications uniontelecom itut g.
Figure 1, otn has been optimized to be the transport protocol to carry a converged mix of different types of client signals in a manner that efficiently uses the optical layer resources. The optical transport hierarchy oth is a new transport technology for the optical transport network otn developed by the itu. Sonetsdh transport infrastructure and to help manage network complexity. 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. The optical transport network is designed to deliver a transparent framework to efficiently carry diverse traffic types, which can decrease acpexopex in networks and at the same time address dramatic shifts in traffic types. This white paper provides a tutorial overview of otn, with primary. The itus optical transport network otn recommendation provides a networkwide framework that truly delivers on the carrier requirements for reduced costs, greater flexibility, and increased efficiencies. Together, these fundamental principles form the basis for the notion of optical data networking. Two generations of otn have already been widely deployed.
1333 584 250 1384 1092 700 1203 592 825 792 1003 604 1578 246 1599 922 377 364 1203 885 310 695 6 505 1312 1566 1079 218 32 1475 374 1180 1153 714 686 1393