China Unicom Jiawu: China is expected to deploy next-generation PON technology on a large scale in 2025

At the "2018 China Optical Network Seminar", I talked about the overall concept of 50G PON construction and deployment. Jia Wu, senior engineer of the optical access network room of the Network Technology Research Department of China Unicom Network Technology Research Institute, said that China Unicom actively supports the industry to accelerate 50G PON. Related device and system implementation technology research will select 50G PON as the next-generation PON technology after the scale deployment of 10G PON, and is currently promoting research on 50G PON wavelength plan.

"China Unicom supports the promotion of PON convergence to avoid the PON industry chain continues to differentiate and reduce CAPEX and OPEX." Jia Wu stressed that China Unicom is currently vigorously promoting the coexistence research of 10G EPON and 50G PON, and will be in FSAN and ITU-T. Continue to promote related work.

After the previous laboratory tests and field tests, China Unicom completed the technical reserve of 10G PON FTTH interoperability. In April 2018, China Unicom launched the collection and testing of different single-board OLTs such as XG-PON, Combo-PON and 10G EPON. The intercommunication function and performance test of multiple test cases have become mandatory requirements. Jia Wu said that it is expected that China Unicom's 10G PON FTTH will be deployed and deployed in 2019.

"From the perspective of the expected time node of the next-generation PON technology, the large-scale deployment interval of the two-generation broadband access platform is about 7-8 years, so the expected time node for deploying next-generation PON technology in China is about 2025. "Jia Wu said.

It is understood that the ITU-T 50G PON technology standardization work has been started, and the development of the new generation PON technology standard has entered the fast lane. However, ITU-T and IEEE organizations still have differences in the selection of next-generation PON technology routes, and it is still difficult to reach a consensus in a short time.

In Jiawu's view, ITU-T's 50G TDM PON deployment should coexist with 10G PON (including ITU-XG(S)PON and IEEE 10G EPON), and there is currently no coexistence requirement for 50G PON and 1G PON.

Jia Wu also pointed out the requirements of 50G TDM PON system: should be able to reuse ODN and coexist with 10G PON; OPL should be at least 28dB; maximum transmission distance is at least 20km; speed, downlink 50Gbps, uplink 10Gbps/25Gbps/50Gbps, it is recommended to pass The TDMA method first implements uplink 10 Gbps/25 Gbps, and 50 Gbps is set after the technical breakthrough.

Jia Wu believes that 50G PON should introduce SDN/NFV flexible network traffic scheduling and access network management. The following evolution issues need to be studied: First, how traditional O&M systems (OSS/EMS/ITMS) coexist and evolve to new clouds. The second is how to decouple the step-by-step evolution of CPE, CO and operation and maintenance systems; the third is how traditional equipment works under the new cloud architecture; the fourth is how to solve new business in the process of long-term network architecture evolution The problem introduced.

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