The characteristics of G mobile communication are that it pays attention to availability and efficiency, has faster transmission speed and greater resource utilization, and can truly achieve wireless coverage on the premise of ensuring security, reduce latency and provide users with fast experience. Systematic. Although the related technology has not been completely completed, the basic characteristics of 5g are obvious: high speed (peak rate is greater than 20 Gbit per second, equivalent to 20 times of 4G), low delay (network delay is reduced from 50 ms to 1 ms of 4G), large-scale equipment connection (serving 100 billion level connection), low power consumption (base station is more energy-saving, terminal is more energy-saving). The main technologies of 5g mobile communication include important technologies, such as new network architecture, intelligent, multi antenna transmission, direct communication between devices, full duplex and dense network. Taking the famous intelligent technology as an example, in 5g mobile communication, it is inevitable to need a large number of servers, while in the field of cloud computing and big data, it needs a variety of base stations, services and frequency bands. Frequencies must always be connected interactively. In the aspect of antenna transmission technology, it will be based on a group of active antennas and realize 3d-mimo technology in the application of multi antenna technology. Meet the energy-saving needs. In addition, the same frequency full duplex technology with greater flexibility can suppress all kinds of interference information, and even use geometric utility to significantly improve the spectral efficiency. Among the key technologies of 5g mobile communication, the dense network is 1000 times more than 4G in data flow. The Hongji station can complete the scale of antenna layout, with larger external space. The internal data density is closely related to data flow, which will make the system have more comparative advantages in capacity, flexibility and practicability. In addition, according to the new network architecture technology, it can be expected that its various costs will be greatly reduced, and the equalization function will make the realization of c-ran and Cloud Architecture richer, so that the wireless network architecture can complete large-scale cooperation and joint equipment. The direct communication technology between base station and base station easily improves the characteristics of poor flexibility, allows D2D to be directly applied to equipment, breaks through the barriers of communication influencing factors, and expands the basis of relay technology, which will make 5g network unimaginable. How to improve people's expectations of future information technology; there is also a high bandwidth technology, which can also increase the bandwidth from 3GHz to 273.5ghz, with smaller size,<br>
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