At the 43rd session of the World Congress on Optical Fiber Communication (OFC 2018) in 2018, Zhang Chengliang, vice president of China Telecom Beijing Research Institute, was invited to make a keynote speech (plenary Speech) as the first special guest of the OFC conference from the Chinese industry, standing on the most important podium of the world's top optical communication conference And make a voice from China. The OFC conference, held every March, is recognized by the global optical communications academic and industry as the highest level and the largest event, representing the global optical communications academic research and industrial development of the wind vane, this year nearly 15000 people registered to participate. This report was quickly widely concerned by the global industry, lightreading and other professional media first reported, sparking a heated debate.


The global communications sector is ushering in a strong wave of digital transformation, Zhang Chengliang combined with the development of ICT and the Internet in China, this paper describes the strategy of CTNET2025 network reconstruction being carried out by Chinese telecom, and expounds in detail the thinking and suggestions of China Telecom on the future development of optical Network industry under the framework of CTNet2025. The biggest point of the report is China Telecom's all-optical network strategy. The first is the Access field of the All-optical Network 1.0 strategy has achieved the stated goal in 2017, China Telecom optical fiber access and hundred megabytes of entry ratio of more than 90%.

Zhang Chengliang further pointed out that the development driving force of the future access network mainly comes from video and smart families, China Telecom will also continue to promote the all-optical network 1.0+ strategy, is expected to fully provide gigabit to home broadband and intelligent in 2025. At the same time, China Telecom has also launched an all-optical Network 2.0 strategy in the field of backbone transmission, relying on ROADM equipment, 100g/ultra-100G coherent technology, Wson and a jump direct all-optical architecture to achieve wavelength level scheduling, minute-level business issuance, second-level recovery, and millisecond delay.

Zhang Chengliang mentioned that China Telecom's recent deployment of the middle and lower reaches of the Yangtze River Intelligent Roadm Network is a key step in the implementation of the All-optical Network 2.0 strategy, but also to provide a practical reference for the industry as a whole. Facing the impact of 5G and cloud, Zhang Chengliang elaborated the M3C-OTN strategy of Metro Optical Network. He pointed out that as the world's largest LTE FDD operator in the 4G era, China Telecom will continue to lead the industrial development in the 5G era. The three m in M3c-otn represent multi-service (Multi-Service), Mobile hosting optimization (mobile-optimized), and man-domain network applications (Metro), and C represents network Cloud (cloud), with the goal of optical network technology,

For fixed and mobile broadband services and high-quality enterprise line business to provide the best cost-effective comprehensive load-carrying scheme. Zhang Chengliang finally stressed that the optical network industry is currently in a period of major change, China Telecom attaches great importance to the sustainable development of optical network technology. All Optical Network 1.0, all Optical Network 2.0, M3c-otn and other strategies in different network levels to promote the optical communication and optical network technology innovation applications and scale deployment. Work is good, take advantage, optical network industry wants to "be good" in the future transformation of communication digitalization, we must promote the innovation and cooperation of optical network technology, that is, "Lee". China Telecom will work with the global optical network industry partners with an open attitude to build a more efficient, agile and green intelligent global Internet.