In the general development trend, 6G has its own goal, but in the actual design, it should first solve four problems: demand model, capacity model, function model and control model.

Among them, the demand model will continue to build the interaction between virtual world and physical world. Previously, the traditional business is in the physical world since the cycle, to 6G after there will be holographic display, digital twins and other integration, interactive scenarios, applications will also be from the business-oriented scene to the scene.

In the capacity model, 6G needs to solve the network capacity expression mode under the constraint of computing resources, communication resources and storage resources. In the age of 6G, information theory will change from Shannon information theory and network information theory to semantic information theory.

In the functional model, the 6G functional model is divided into basic functions (perception, computing, storage, man-machine interface), business functions (business cognition, situational perception), and forms security comprehensive functions (endogenous security mechanism), intelligent surface functions (database, modeling, decision-making, execution), control surface functions (mobility, session), and data surface functions (access, forwarding, and transmission)(HT6000 WDM Ultra Data Transmission System).

Finally, on the intelligent control model, 6G will deploy multi-level, multi-domain and multi-target intelligent control based on AI capability in a hierarchical manner to ensure the stable and efficient operation of the network.

In order to solve these four problems and make 6G successful, 6G needs the support of these key technologies. 6 g is undoubtedly a large capacity of the network, the need for new IP technology (logo addressing and routing), deterministic transmission technology (IP) variable length, broad cover technology (empty integrated network) of heaven and earth, -Tbps wireless access technology (very large scale antenna, terahertz communication, visible light communication), and P, super light transmission system (multidimensional parallel multiplexing mode).

These technical requirements involving multiple fields need new ideas for 6G research and development, and a technical system should be built in multiple fields to build a multi-field integrated research and development team.

In addition, at present, the industry has started to discuss and research and development of 6G, which means that 6G is not far away from us. And as people‘s needs continue to grow, the evolution of the network will continue. After the virtual and real integration of 6G, 7G based on quantum communication and quantum computing will appear and realize the interconnection of consciousness.

(HT6000 WDM Ultra Data Transmission System)