What is intelligent optical network communication?

With the rapid development of information technology, the information volume of data services has increased dramatically, and it has become the consensus of network operators and equipment manufacturers to expand the capacity of core transmission networks by using optical technology. Today, with the explosive growth of information capacity demand, intelligent optical network may become an important new communication transmission technology and be widely used because of its dynamic allocation of network bandwidth and high cost performance. In the past, a large number of point-to-point DWDM systems with various specifications were used in backbone transmission networks. This kind of network lacks certain flexibility, is difficult to implement and has high cost, and cannot meet the requirements of providing new services quickly. Especially with the explosive growth of IP traffic and the uncertainty and unpredictability of IP traffic itself, the dynamic allocation of network bandwidth is becoming more and more urgent. This rapidly changing business environment requires a new optical network with strong dynamic performance to meet the needs of new services. The traditional method of manually configuring network connections has been difficult to meet the needs of modern networks and fast new services. It has always been the goal of people to provide a solution that conforms to the characteristics of metropolitan optical network, dynamically allocates network bandwidth and has high cost performance. Intelligent switched optical network is a new generation of optical network technology that came into being under the impetus of this market environment. Intelligent switched optical network integrates voice signal transmission, Internet IP service transmission, ATM signal transmission, frame relay transmission and digital image signal transmission, which can provide voice signal, data signal and image signal transmission on the same transmission platform, realize the unification of transmission networks, enable transmission service providers to provide full-service transmission services with low investment and enhance the competitiveness of transmission service providers. Nowadays, communication services put forward higher requirements for communication networks, and the functions of network optimization, routing, protection and self-healing are becoming more and more important in the field of optical communication. Intelligent switched optical network can ensure the reliability of the network and provide a flexible signal routing platform. Although the existing communication systems all adopt circuit switching technology, the developing intelligent optical network needs intelligent switching technology to complete the signal routing function, so as to realize the high-speed network and the transparency of the protocol. Intelligent optical switching technology provides dynamic optical domain processing for high-speed information flow entering a node, only adding and discarding information belonging to the node and its subnet, and handing it over to electrical switching equipment for further processing, which has the following advantages: first, it can overcome the capacity bottleneck problem of pure electrical switching; Secondly, it can save a lot of network construction and network upgrade costs; In addition, it can greatly improve the flexibility and survivability of network reconfiguration and speed up the time of network recovery. In intelligent optical network system, optical switching node equipment is an important core equipment, and intelligent distributed control software platform is an important component technology of intelligent optical network system. Of course, intelligent optical network is not only composed of core switching equipment and intelligent distributed control software platform, but also includes network transmission platform and network management platform. Under the control of standard signaling, the core switching equipment dynamically establishes end-to-end optical paths for users according to different user needs and routing algorithms (such as OSPF). The intelligent distributed control software platform embeds the control function module into each network element, and each network element can exchange related routing and node information dynamically in real time, so that each network element can know the topology structure of the whole network and the state of related links from the dynamic routing protocol; Transmission platform is the basic physical transmission carrier of intelligent switched optical network. However, with the development of demand and technology of intelligent optical network, the structure of intelligent optical network will be composed of two layers: intelligent optical core network and intelligent optical edge network. Optical core network is mainly composed of the following network units: optical transmission system; Hybrid ADM/ broadband digital cross-connect system: optical add-drop multiplexer (OADM); Intelligent optical switching system; Terabyte router. Optical transmission systems transmit various signals through optical channels separated by optical fibers. Hybrid ADM/ broadband digital cross-connect system exists at the boundary between edge network and core network. It is the integration of broadband digital cross-connect and SDH, but it adds the functions of TDM and packet switching/grooming, and provides a direct transition from SONET/SDH layer to optical layer. Optical Add/Drop Multiplexer (OADM) nodes in optical networks add/drop optical channels directly without photoelectric conversion of signals, which will play an important role in the era of DWDM-based network proliferation. As a network unit, intelligent optical switching system combines the functions of optical switching equipment and some characteristics of SDH ADMs, broadband digital cross-connect system and data switching system, and serves as the main node of the backbone network of operators. The role of DWDM in optical edge network is to provide a bridge between business layer and optical layer. For different operators, there are many different positioning at the edge of optical network. The diversity of carrier networks leads to the diversity of optical edge network equipment. However, the goal and application of optical edge network are the same. These goals include: the network element is designed as a system rather than a single-purpose device; The flattening of network hierarchy breaks the previous obvious network hierarchy and forms a single-layer network; The network carries out multi-service management and service provision through a unified software platform; Solve the bandwidth gap between enterprise LAN and core optical network. Intelligent switched optical network changes centralized management into distributed management by intelligentizing network elements, and devolves many functions of the original network management to each network element, thus realizing real-time manageability of the network. Many tasks that originally required manual participation were completed by the network itself, which greatly improved the service efficiency of the whole network. Flexible and fast service provision is one of the important functions of intelligent switched optical networks. In addition, intelligent optical network makes optical network evolve from traditional "pipeline network" to "service network". This evolution is not an abandonment of the previously built network, but a seamless innovation process, which largely protects the original investment of users. Through intelligent switched optical network, communication service providers can manage and utilize network bandwidth resources conveniently and freely according to actual needs.