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OTN application scenarios

7/19/15  |  Technical Article

OTN's intelligent optical network will provide the ideal solution for the transmission of large-granule broadband services. Inter provincial transport network main trunk transport network, provincial trunk transport network, metro (local) transport network structure, while the Metro (local) transport network can be further divided into the core layer, convergence layer and access layer. SDH relative terms, the biggest advantage of OTN technology is to provide scheduling and delivery of large particles of bandwidth, therefore, at different levels whether to adopt OTN network technology, depending on the size of the primary particles dispatch service bandwidth. According to the network situation, primarily particles inter-provincial trunk transmission network, the province trunk transport network and metropolitan area (local) transport network core layer of scheduling is generally Gb/s and above, therefore, these levels can be given priority and scalability advantages OTN technology to build better. For Metro (local) transport network convergence and access layer, when major scheduling particles reach Gb/s order of priority can also be constructed using OTN technology.

1. The national backbone optical transmission network

With the rapid increase in IP-based, to carry out new services and broadband users, networks and services, IP traffic on State Route surge in bandwidth demand increased year by year. WDM national backbone carrying the PSTN / 2G toll services, NGN / 3G long-distance services, Internet national backbone business. As was carrying a huge amount of business, WDM national backbone protection needs of bearer services is very urgent.

With OTN technology, national backbone IP over OTN bearer mode can achieve SNCP protection, a variety of network protection ring network protection, MESH SDH network protection and the like, and its ability to protect and SDH fairly, and that the complexity and cost of equipment greatly reduced.

2. The provincial / regional trunk line optical transport network

Backbone routers in the province / region carrying business (NGN / 3G / IPTV / large customer green, etc.) between the various toll office. Through the construction of provincial / regional trunk OTN optical transport network, enabling GE / 10GE, 2.5G / 10GPOS granular security services, reliable delivery; can set the ring, complex ring, MESH network; demand network scalability; can of wavelength / sub-wavelength cross-scheduling and grooming business, provide wavelength / sub-wavelength green business major clients; can achieve transfer to other services such as STM-1/4/16 / 64SDH, ATM, FE, DVB, HDTV, ANY etc. .

3. Metro / local optical transport network

In the metro core level, OTN optical transport network can be realized metro aggregation routers, local network C4 (district / county center) aggregation and transmission of large particles between broadband services router and metro core routers. Router uplink interfaces mainly GE / 10GE, is also likely to 2.5G / 10GPOS. Metro core layer OTN optical transport network in addition to the large particles can be achieved GE / 10GE, 2.5G / 10G / 40GPOS other telecommunications service delivery, but also access to other broadband services, such as STM-0/1/4/16 / 64SDH , ATM, FE, ESCON, FICON, FC, DVB, HDTV, ANY like; for Ethernet services can implement Layer aggregation, Ethernet channel to improve bandwidth utilization; can achieve wavelength grooming / various sub-wavelength services, achieve wavelength / Dedicated sub-wavelength services access; can achieve the bandwidth on demand, and other optical virtual private network, enabling bandwidth of operation. From the group of the Internet to see, but also reforming the structure of complex networks of metro transport network, so that the transmission network level clearer.

4. Construction of a proprietary network

With increasing demand for enterprise network applications, large enterprises and government departments, but also with the circuit scheduling needs of large particles, while private network with respect to the fiber-optic carrier network resources are very poor, in addition to the introduction of OTN increased flexibility in scheduling large particles circuit , which also saves a lot of fiber resources.

MAN access layer, with the down of broadband access equipment, ADSL2 + / VDSL2 DSLAM access equipment, etc. will be widely used, and the use of GE upward; as the group GE line users increasing, GE will also be a large number of the number of interfaces increase. ADSL2 + device user's distance from 500 to 1000 m, VDSL2 distance from the device to the user is within 500 meters is appropriate. A large number of GE businesses to be transmitted to the BAS and SR end office, using OTN or OTN + OCDMA-PON transmission combination is a better choice, because of the significant savings quickly brought directly connected fiber optic fiber resources consumption and can be used to achieve the business OTN protection and enhancement metro access layer bandwidth manageability and operability capability.

Author: FiberOnSale.com

 OTN, application, transport network, technology

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