Chapter 800 5G
Xiao Boshi is busy promoting Lightning and Hema supermarkets overseas, and Dafeng Group's conference is still going on.
At 6 am on June 29, Hongmeng released the latest data. The global sales of Hongmeng 9 exceeded 10 million within 12 hours, and the global sales of Hongmeng mini 9 exceeded 8 million within 12 hours.
Hongmeng has once again refreshed its own historical record, and as the public speculates, at least these 18 million mobile phones are in stock.
Among them, nearly 3 million mobile phones have already arrived in the hands of users, and more than 50% of the remaining 15 million mobile phones will be delivered to consumers on June 29.
In the supply chain era, Dafeng Group is at the forefront.
At 8 a.m. on June 29, the second day of the conference officially opened. Guests present could see the theme of the day by turning on their mobile phones: Gale Manufacturing 2025.
Due to the positive echo of Made in China 2025, the content of the conference on this day has attracted more attention.
The content of today's conference is very compact. There will be more than 50 speeches, including some familiar technologies and some unpopular technologies.
As the opening speech on the second day of the conference, it is a technology that is unfamiliar to the public: 5G.
The speaker of this topic is You Xiaohu, who is known as the leader of Huaxia 4G. You Xiaohu is the director of the State Key Laboratory of Mobile Communication of Southeast University. Meng Qian did not ask him to resign from Southeast University, but let him He also served as one of the three core leaders of the 5G team in Dafeng Group.
With this part-time job in Dafeng Group, You Xiaohu also gets a part-time salary of 5 million a year.
After You Xiaohu took the stage, he first introduced Ada Alikan, who was invited by Gale Group and was sitting in the audience today.
Ada Alikan is the creator of the concept of polar codes. Both Dafeng Group's 5G and Huawei's 5G are based on Ada Alikan's polar codes.
"I don't know if many people are wondering now, what is 5G? Why did 5G start a few years after 4G came out? And why do we use 5G as the content of the first speech today?
Let's understand step by step.
When smartphones first came out, Mr. Meng said that 3G is no longer enough and we need 4G. Facts have also proved to us that 4G has promoted the development of smartphones.
And today we are going to talk about Gale Manufacturing 2025. At this time, 4G is no longer enough, we need 5G, so we need to understand 5G.
The simplest understanding of 5G is fast speed. We expect 5G to be at least a hundred times faster than 4G, with low latency. We expect 5G to have a delay of less than one-tenth of 4G. The coverage is deep. We expect 5G to be able to achieve full-scenario Full coverage.
But behind these three simple descriptions, there are a lot of technical issues involved, and it takes us a little time to understand. "
You Xiaohu is a standard technical school + teacher school. He said that it would take a little time to understand, and he only talked for more than an hour, and he was full of dry stuff. He said that everyone seemed to be listening to a bible and just wanted to sleep.
Fortunately, there are many enthusiastic viewers on the Internet who are willing to help you analyze You Xiaohu's content, and extracted a very critical information, that is, Huaxia's advantages in 5G technology.
The first advantage is that the advantages of TDD have begun to show. 5G is inseparable from Massive MIMO, that is, array antennas with multiple inputs and multiple outputs. The most straightforward translation is large-scale antennas. This thing is a great contributor to the 5G era.
In the 4G era, base stations and mobile phones used a small number of antennas, mainly due to size constraints. After 5G uses millimeter waves, the size of the antenna becomes very small, and a large number of antennas can be easily integrated.
However, in order to realize Massive MIMO, the base station must accurately grasp the channel information and terminal location. This is not a big problem for the TDD system of time division multiplexing, but it becomes a big trouble for the FDD system of frequency division.
Since the uplink and downlink of the TDD system use the same frequency band, the downlink channel can be estimated unilaterally based on the uplink channel conditions, that is, the downlink from the base station to the terminal can be inferred by using the reciprocity of the uplink and downlink channels. On the contrary, because the uplink and downlink are not in the same frequency band, the FDD system cannot directly use the uplink channel condition to estimate the downlink channel condition.
One solution is to introduce CSI feedback, but the problem is that if there is a large amount of CSI feedback, as the number of antennas increases, not only the overhead will increase, but the accuracy and timeliness of the feedback information will also decrease.
The disadvantages of FDD on this issue are so obvious that in the 5G era, everyone has to look to China's TDD technology.
Moreover, Huaxia began to develop smart antennas in the 3G era. What was useful at that time, it suddenly became useful in the 5G era.
The second advantage is that changes in the 5G core network architecture need to involve service architecture, edge computing, and network slicing.
Network slicing is to divide the physical network of the operator into multiple virtual networks. Each network can adapt to different service requirements and different scenarios, thus avoiding the construction of a dedicated physical network for each service, which can greatly save deployment. the cost of.
And this is the direction that Dafeng Group has specialized in these years, and the cooperation between Huaxia Telecom operators and Dafeng Group has been very mature, and a perfect connection can be achieved in 5G technology.
The so-called edge computing is to use an open platform that integrates network, computing, storage, and application core capabilities on the side close to the source of objects or data to provide the nearest end services. Its applications are launched on the edge side to generate faster network service responses and meet the basic needs of the industry in terms of real-time business, application intelligence, security and privacy protection.
Edge computing needs to establish computing and storage capabilities on the base station, complete computing and issue instructions in the shortest time, and this happens to be Huawei's special event.
The service-oriented architecture is even more coincidental. Why Cisco has almost no market in China? Apart from the influence of Prism Gate, there is another very important reason that Cisco lags behind Huaxia enterprises in the matter of service-oriented architecture. It is more accurate to say One point, service-oriented architecture is a leading technology in China.
Therefore, after the Prism Gate, many products of Huaxia still have to go to American companies to buy, but Cisco’s products are basically replaced by domestic products, because in the era of service-oriented architecture, Huaxia is in the forefront, and Huaxia’s leading technology naturally does not need to rely on the United States. enterprise.
In the previous life, 3GPP announced the SBA architecture proposed by 26 companies led by China Mobile as the 5G core network infrastructure. This life is basically more stable.
Another most basic advantage is that 5G actually uses a large number of mature technologies from the 4G era, and Dafeng Group itself is one of the two largest 4G players in the world, and Huawei is one of the top ten global players in the 4G era.
So although everyone may not be able to understand what kind of technology 5G is for a while, at least everyone basically understands that 5G is a technology that China is likely to lead, and this concept must not only be conveyed to Chinese people, but also communicated to the world.
In addition, You Xiaohu reminded everyone about the significance of 5G again when summarizing, "The past ten years have been the decade of cloud computing and artificial intelligence. With the development of artificial intelligence algorithms, the maturity of cloud technology , The sensor technology has improved the ability to perceive the world, and the computer has more powerful capabilities.
What the entire computer industry lacks now is a communication technology that can quickly link information densely distributed in the entire network world. This technology must not be 4G, and it may not necessarily be 5G, but it must be at least 5G.
5G will be the foundation of Gale Manufacturing 2025. "
Thanks for the rewards of the time has passed!