One is to build a super-connected optical access network through TDM+WDM+SDM multi-dimensional multiplexing.The mainstream 10G TDM-PON technology of industrial PON has a high degree of technological maturity and a complete industrial chain. One OLT device can connect more than 10,000 terminals, meeting the ultra-large connection requirements of the industrial Internet.At the same time, based on the needs of the industrial Internet, it will also upgrade to 50G PON to meet the needs of higher bandwidth services.WDM is an important direction for further upgrading of PON. It has development potential and the industry chain is gradually maturing. WDM-PON has greater connection capability and bandwidth capability. Multiplexing, a single PON port can realize the connection of thousands of ONUs.The second is to realize the ultra-low delay industrial PON system.Through the FBA fixed bandwidth mechanism, the upstream burst (burst) is shortened, the out-of-band windowing and other mechanisms are used to reduce the PON system delay, and the downstream delay is 75 microseconds and the upstream delay is 200 microseconds.At the same time, the project is also researching an industrial PON system with ultra-low delay. By using wavelength division and coherent technology, the delay of PON can be controlled to within 10 microseconds.The third is to build a high-reliability and high-security PON network.PON has complete protection switching, such as PON optical link protection can adopt TYPE D mode (OLT dual PON ports, ONU dual PON ports, trunk fiber, optical splitter and distribution fiber are dual redundant) to ensure the system's High reliability: The signal sent by the OLT in the PON system can be received by all ONUs, and it is necessary to ensure the high security of the system and data through a perfect ONU access security mechanism and encryption algorithm.The fourth is to develop a new type of computing and network integration industrial gateway.In view of the characteristics of industrial communication data interfaces, complex protocols, and incompatibility, a multi-protocol conversion system based on the edge computing capability of ONU is designed to realize transparent data transmission across the transport layer.For deterministic, low-latency and low-jitter bearing requirements, the edge computing capability is downgraded to on-site ONUs.The key technologies of industrial PON converged gateways include: single-frame multi-burst low-latency technology, airtight, anti-corrosion and electromagnetic isolation technology, computing power based on virtualization/containerization to enhance ONU hardware architecture, and multi-processing based on ONU edge computing capabilities. Protocol conversion.Industrial PON can be applied to various industrial fields.For example, in mining scenarios, by deploying OLT active/standby protection, highly reliable industrial ONU connections can be realized; industrial PON networks can realize multi-service mixed bearing; pre-connected ODNs can realize rapid construction, reducing operational difficulty and danger.Industrial PON has begun to be applied on a large scale.In the case of an enterprise group in Hebei, by deploying a high-speed, converged and secure industrial PON network, the group has realized the unified carrying of high-definition video surveillance, industrial information collection, intelligent manufacturing, cloud services, and massive data exchange; In order to meet the needs of multiple scenarios including automatic dust management, video surveillance + intelligent AI, remote tower cranes, personal intelligent supervision of employees, intelligent safety systems for construction sites, and enterprise cloud platforms, the smart construction site solutions of PON+5G can greatly improve the efficiency of smart construction sites. It has improved the scene-based and customized capabilities of site operation and management; in an environmental protection intelligent monitoring station project in Zhejiang, problems such as difficult operation and maintenance of remote sites, low security, complex natural environment, many sites, and data collection and transmission need to be solved. Through the application of industrial PON technology, the high anti-interference characteristics of optical fiber and the high reliability mechanism of industrial-grade PON are used to meet the requirements of environmental adaptability.From the perspective of industrial PON technology development, industrial PON1.0 mainly provides basic networking functions. PON equipment integrates various industrial interfaces such as Ethernet, RS232/485, CAN, etc. to realize the interface interconnection of "fiber to machine"; industrial PON2. 0 Realize protocol conversion, data acquisition, integrate various mainstream industrial protocols, have industrial data acquisition/upload capabilities, and realize "fiber-to-machine" protocol interoperability.Tang Xiongyan pointed out that the next step towards industrial PON3.0 will pay more attention to the interoperability of systems and applications, realize the connection between PON equipment and industrial cloud platforms, support the new generation of industrial Internet functions such as MEC, TSN, network AI, industrial security, etc. Equipped with industrial APP to achieve "fiber to machine" application interoperability."Realize the synergy between optical network and 5G, and empower the industrial Internet!" At the end of the speech, Tang Xiongyan advocated to the industry to seize the development opportunity of the industrial Internet and give full play to the large bandwidth, low latency, high reliability, high security and other deterministic networks of optical networks. Advantages, promote the application of optical network technology in the industrial Internet, carry out industrial optical network technology innovations such as industrial PON, industrial OTN/WDM, etc., realize the integration of industrial optical network and industrial Ethernet, 5G, WiFi, TSN and other technologies to build an industrial network. Computing the network, advancing fiber-to-the-machine (FTTM).