DWDM transmission scheme of a Russian backbone network
Demand:
Site1--Site12, total distance 521km, using 2-core optical cable, a new 40-wave DWDM dense wavelength division multiplexing transmission system, a single channel 10G, a total capacity of 400G site 2 Murray site 11 optical amplifier station.
Solution
Solution topology diagram:
Solution description:
1) considering capacity expansion, 40 × 10G full wave design and XFP 40km
2) due to excessive attenuation in a single site, Site7 Site9 Site10 needs OEO regeneration.
3) Link optical power calculation: unidirectional: XFP single-wave luminous power is calculated according to 0dBm (- 2~3dBm), single-wave output is 5dBm after BA amplification, after 6-stage LA amplification, Site9 LA optical power is-- 18dBm, amplified by LA, DEMUX attenuation, single-wave power is-6dBm, ensuring that the receiving optical power of XFP is within a reasonable range; reverse: after calculation, the single-wave power at the receiving end is-6dBm, which is guaranteed in the range of XFP sensitivity.
4) Link dispersion calculation: G.652 fiber, XFP module of 40km, total length 404km of Site1--Site7, total compensation 380km.
5) OSNR calculation of the system: Site1--Site7 OSNR=25.6dB > 24dBline Site7 Murray site 9 OSNR=24.6 > 24dBMagneScriptSite9 Must9 OSNR=26dB > 24dB, meeting the design specifications
Solution advantages:
Save fiber optic cable:
This project, the whole process of 521km, transmission of 400G traffic, only 2 fiber optical cable
Super large capacity:
The 40 × 10Gb/s DWDM transmission system used in the project is a super-large-capacity dense wavelength division multiplexing optical transmission system, with a total capacity up to 400Gbps, which is the optimal solution for big data's transmission capacity expansion at present.
The board adopts 3R design:
OTU wavelength conversion unit adopts 3R design, which can realize signal wavelength conversion, amplification and regeneration, waveform × × ×, clock retiming, solve the problem of signal deterioration caused by long-distance transmission, and ensure normal and stable signal transmission.
Modular design: business card adopts modular design, supports hot plug, can be replaced at any time, and is easy to upgrade and expand capacity.
Flexible and transparent access to multiple services:
Ethernet services: FE, GE, 10GE (LAN/WAN)
SAN storage business: 1Gbps, 2Gbps 4Gbps, 8Gbps
SDH service: STM-1/4/16/64
Open system architecture: supports the interconnection and interworking of devices from different manufacturers, and supports single-mode, multi-mode and optional electric ports for client devices.
