China is modernizing at blazing speeds, and this has put a strain on the country’s national telecoms. When the Chinese Ministry of Industry and Information Technology announced the Broadband China project, which aims to connect 70 percent of the country’s home with broadband by the end of 2013, China Unicom (News - Alert) knew it had to beef up its optical transport network and the network intelligence that allowed the company to move traffic efficiently.
China Unicom, which delivers telephone and broadband service to more than 395 million people in 31 provinces, municipalities and autonomous regions in China, needed an optical network upgrade. The company’s transport network needed to increase due to high speed router interconnection and the unrelenting demand of 40 Gbps trunks. It needed to support the increase of 40 Gb/s traffic while also preparing the way for 100 Gbps just around the corner, noted a recent case study.
The Broadband China project will increase the fiber-to-the-home coverage by more than 35 million Households and propel China’s average broadband bandwidth capacity in urban regions to 20 Mbps by 2015, with 250 million users.
The solution was Alcatel-Lucent’s (News - Alert) Agile Optical Networking, according to the case study. China Unicom selected Alcatel-Lucent’s 1830 Photonic Service Switch (PSS) for five new national backbone networks with a total transmission distance of 5,000 km covering all the eastern area of China. This included Beijing, Shanghai, Guangdong, Zhejiang, Fujian, Jiangsu and other major cities.
Initially, the 1830 PSS nodes will use Alcatel-Lucent’s 40G coherent technology, which will ensure a graceful upgrade to 100G when the time comes. By using Alcatel-Lucent’s BPSK-based 40 Gbps coherent technology, according to the case study, China Unicom has the advantage of unimpeded mixing of 40G and 100G WDM channels as needed.
Use of coherent technology for 40 Gbps as well as for 100 Gbps enables much greater reach while dramatically reducing the need for regeneration and at the same time eliminates the need for Dispersion-Compensation Modules (DCMs), according to the paper.
One of the key reasons that China Unicom chose the Alcatel-Lucent solution was for the 1830 PSS platform’s integrated Wavelength Tracker, which provides photonic layer OAM and service assurance which proved to be a critical solution differentiator for China Unicom. Wavelength Tracker automatically monitors and adjusts wavelengths and power levels at any point in the network, without requiring manual measurement using Optical Spectrum (News - Alert) Analyzers (OSA).
With optical transport provided by Alcatel-Lucent, China Unicom is bringing broadband to the huge and expanding market for next generation services in the world’s most populous country.
Edited by Peter Bernstein