Structurally, otn utilizes a digital wrapper, a multiplexing hierarchy. Transmission techniques and multiplexing hierarchies transmission of data signals timing and synchronization transmission techniques and multiplexing pdh atm ipethernet. The ncs 4000 24 port lowrate otn line card can provide mapping into otn containers as well as otn multiplexing functions. Otn family 100g sar and packet mapper for pots tpoc415. Otn family 100g odu2 mapper and multiplexer tpo215. The ncs 4000 20x10g otn line card line card can provide mapping into otn containers as well as otn multiplexing functions figure 8. Transmission techniques and multiplexing hierarchies. Figure 5 otn switch with a mix of client interfaces and multiple 100g line interfaces an otn switch enables oduks odu01.
Multiplexing in the otn domain is defined in section 19 of g. The otn frame fec scrambling otu, odu, opu overheads tcms delay measurement otn rates oduflex otn multiplexing hierarchy ho, lo. New mapping procedures further increase the flexibility of otn for multiplexing and aggregation applications. In case of conflict between the material contained in the tutorial and the material of the relevant recommendation the latter always prevails.
Optical transport networks training bangalore hyderabad. The generic mapping procedure gmp allows for almost infinite negative frequency offsets of the lowerrate signal relative to the higher rate. The otn specifically the mappingdemappingdesynchronizing and multiplexingdemultiplexing processes and justification granularity information is designed to transport synchronous client. Ncs 4000 20x10g otn line card the ncs 4000 20x10g otn line card line card can provide mapping into otn containers as well as otn multiplexing functions figure 8. Demand for bandwidth is booming in todays highspeed core network market, and nems are faced with increased demand for highspeed otn switches from traditional carriers for data center applications. In this mapping scheme, the payload type pt opu overhead field is set to proprietary 0000 1001 called 64b66b mapping of gfpf frames. Understanding optical transport network otn to cvtdallas. Otn multiplexing and mapping structure page16 mapping multiplexing odtug3 odtug2 ochr ochr ochr och och och otu3v otu2v otu1v client signal client signal opu3odu3 occr occr occr occ occ occ ocgnr.
Itut standardized otn client mapping and multiplexing for converged cpri 4g and ethernet 5g support eliminates requirement for wdm optics. Transport networks shift from sdh to otn electronic design. Different mapping methods will be provided pending different rates table 2. Between the 2 otn trail terminations, there might be 3r regenerators, which are equipments that perform complete regeneration of the pulse shape, clock recovery and retiming within. Ncs 4000 20x10g otn line card mapping rate mapping. The pt 21 method, for mapping multiplexing of oduj signals into an oduk signal has the following characteristics. Meeting jitter and latency requirements in mobile fronthaul network with improved otn mapping and multiplexing schemes ruben markus1, leon bruckman1, frank melinn2 1ip light ltd, 4 hashiloach. Cisco ncs 4000 optical transport network otn line cards. Paul goransson, chuck black, in software defined networks, 2014. It then describes the functionality that needed to make otn. Mapping into otn odu1opu1 tributary slots of n x 155. This frees bytes 1, 2, 3 and 4 of column 16 of the otn frame in addition to the three reserved bytes in column 15 for a total of seven bytes to extend the opu payload as shown in figure 1. Otn standards evolved to include a standard multiplexing hierarchy, defining exactly how the lowerrate signals map into the higherrate payloads.
If multiplexing hardware or software is used, multiplexing is counted at the front end for further information on batching and multiplexing refer to on the next slide named user plus metric. Otn multiplexing and mapping structure huawei enterprise. Optical transport network an overview sciencedirect topics. He has 32 patents issued or pending, over 24 published papers, and is coauthor of a telecommunications textbook and of two additional book chapters. On the other hand, otn offers the following benefits. Dwdm4 cx and dwdm8 c are units for dwdm multiplexing. Senior sales executive for the adtell group, frank mcclatchy presents the topics. Fiber fundamentals, evolution of wdm, dwdm parameters to validate, optical spectrum analyzers, fiber. All otn networking applications covered latest otnpacket standards supported maximum flexibility provided low risk for system vendors and end users low development cost and total cost 2. The original otn standard mapped constant bit rate cbr signals using an asynchronous mapping. To download software, visit the cisco software center. The aim of the otn is to enable the multiservice transport of packet based data and legacy traffic, while dw technology accommodates nonintrusive management and monitoring of each optical channel.
The network provides functionality of transport, multiplexing. The choice of the odu4 rate also mandated development of an enhanced mapping and multiplexing. Otn multiplexing and mapping structure hain created. He is a recipient of the committee t1 alvin lai outstanding achievement award and the atis outstanding contribution award for his standards work. Interfaces for the optical transport network otn and. Otn is an industrystandard optical transport protocol itu g. Although its now common to link otn and ethernet technologies, otn was not originally created to work specifically with ethernet. Fc400 mapping into opuflex ib sdr mapping into opuflex ib ddr mapping into opuflex ib qdr mapping into opuflex fc800 mapping into opuflex 0a stm1 mapping into opu0 0b stm4 mapping into opu0 0c fc100 mapping into opu0 0d fc200 mapping into opu1 0e 0f 10 bit stream with octet timing mapping 11 bit stream without octet timing mapping. They transmit bits using various encoding and multiplexing.
The enhanced multiplexing capability of otn allows different traffic typesincluding ethernet, storage, and digital video, as well as sonetsdhto be carried over a single optical transport unit frame. This course provides an indepth introduction to the terminology and technology that will comprise tomorrows optical transport networks. Otn principles otn layering model optical layers electrical layers. A standard feature set and software api are common across all bandwidths to ease development of management software at current and future nodes.
Mapping procedures asynchronous mapping amp bit synchronous mapping. Mapping and demapping of nonotn signals into and out of otn signals. Through this otn structure diagram, we have a better understanding of the internal structure of otn, which is very helpful for dealing with otn. This allows any otn switch and any wdm platform to electronically groom and switch lowerrate services within 10 gbps, 40 gbps, or 100 gbps wavelengths. Optical transport networks training otn training course overview optical transport networks training are composed of a set of optical network elements connected by optical fibre links to provide functionality of transport, multiplexing. Otn family 100g odu2 mapper and multiplexer tpo215 intel. This allows inserting up to 10 mapping multiplexing. An optical transport network otn is an interconnection of optical switches and optical fiber links.
Otn was designed to provide support for optical networking using wavelengthdivision multiplexing wdm unlike its predecessor sonetsdh itut recommendation g. As of december 2009, otn has standardized the following line rates. A smaller opukoduk container and otn tributary slot size enhanced mapping procedure for the case where there is a large disparity between the client rate and the lo odu rate, or between the lo odu rate and the rate of n ho odu tributary slots. In fact, otn was developed to manage wavelength division multiplexing. 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.
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