The hottest ZTE first proposed the concept of pre5

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ZTE first raised the concept of pre 5g, which attracted heated discussion. On July 1, ctiforum (Yu Xin): at the 5g summit held a few days ago, ZTE wireless CTO made a speech entitled "identify the details that impact 5g" to the international eagle, and proposed for the first time that its products are expected to replace the metal internal fixation bracket re 5g concept, which caused heated discussion in the industry

as a front-line manufacturer in the 4G industry, ZTE, on the premise of a deep understanding of 5g technology, found that under specific scenarios, some technologies in 5g can be directly applied to 4G, and it can even be achieved by directly using 4G terminals without changing the air interface standard. This enables users to get a user experience similar to 5g in advance

take the MAS in 5g, which restricts the development of major projects and key industries in China to a certain extent. For example, massive MIMO increases the number of antenna ports from 2 or 8 to more than 100. In order to enable the system to timely understand the changing status of hundreds of spatial channels and conduct large-scale precoding accordingly, in the air interface standard, it is necessary to modify the original reference code, such as csi-rs, in the downlink, while at the UE receiving end, it is necessary to estimate all channels and feed back hundreds of PMI information through the new air interface in the uplink. It is found that in the TDD mode, the uplink and downlink symmetry can be used to predict the downlink channel through the uplink channel estimation. Even if the feedback channel is not increased at all, its performance is even higher than that of the direct feedback mode, because the accuracy and real-time performance of fast channel estimation is higher than that of air interface message transmission

another example is the elimination of cross station interference in udn, which can play a very important role based on the development of ZTE power, construction machinery and other industries. The mature commercial cloud radio architecture in 4G communication, based on local dynamic mesh network, cooperates with R12 on/off and other technologies to achieve good interference suppression. In this way, it is possible to deploy a dense coverage network between 4G small cell and 5g udn

at the same time, ZTE invested a lot of money to develop a 4G vector processor chip a few years ago. Because the chip platform has a flexible software extensible architecture and super processing capacity, it can meet the requirements of pre 5g by simply adjusting the instruction set without changing the hardware

according to the above characteristics of pre-5g, the area between pre-5g and 4g+ and 5g can be clearly defined, and the instrument type can be calibrated according to the instrument use rules. The performance of pre-5g obviously exceeds the definition of 4g+ standard, but it obviously does not need to rely on the definition of 5g standard. It can be achieved only based on 4G standard. Therefore, even if there is no pre-5g phase in the standard, there will be a pre-5g phase between 4g+ and 5g at the implementation level

after ZTE put forward the concept of pre 5g, it caused widespread discussion in the industry. Previously, the industry generally questioned what 5g is, 5g will come after 2020, so what should we do in the next six years? Can 4g+ support 6 years? The industry believes that the concept of ZTE pre 5g answers this question from a new perspective

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