The "1G" era is what we call the "Big Brother era." The communications protocol of this era is analog technology, and the communication rate is about 2kbps.
In this era, China is almost at a backward stage. According to [Wang Hailin] Xiao Bian's review of relevant data, until November 1987, Guangdong Province opened the nation's first mobile communication network, for the first time in the Chinese mainland market. Narrow brick-sized mobile phone equipment, also known as "big brother." I believe we all know that the so-called "Big Brother" has two main characteristics:
First, the price is expensive;
Second, the area is huge.
Subsequently, it entered the so-called “2G era”. During this period, a brand-new era of digital communications began. The communication protocol for this era was GSM CMDA2000, and the communication rate was approximately: 64kbps. In this era, China began to follow the world trend. pace of.
It is worth mentioning that this era is most famous than the European telecommunications giants - Nokia and Ericsson began to capture the global market, it took only a decade, Nokia has become the world's largest mobile phone business.
Do not know, we still remember whether or not, at that time, almost all the streets but where there are mobile phones, almost all Nokia phones. Until 2001, China Mobile launched a simulation network switch in the country, and officially closed down the 1G analog mobile phone network at the end of the year. Since then, China’s mobile communications has entered a period of great development of 2G all-digital, and it has also laid a The king status in the 2G era.
3G breakthrough, 4G synchronization!
Subsequently, the world entered the "3G era". This era refers to the third generation of mobile communication technology. Compared with the first generation of 1G analog signals and the second generation of 2G digital signals, the third generation has a high-frequency-width and stable transmission, video telephony and a large number of The transmission of data is more common and mobile communications have a more diverse application.
It is worth mentioning that this is an age when CMDA is popular, and the communication protocols are W-CDMA, TD-CDMA, etc. The communication speed is much faster than that of the previous 1G/2G era, which is roughly 144kbps-2Mbps.
In addition, with the combination of wireless communications and the Internet, smartphones and tablets are rapidly developing, and 3G is regarded as the key to opening a new era of mobile communications.
In this era, the Chinese telecommunications industry has begun to usher in a breakthrough. Specifically, in 2009, China issued three 3G licenses, namely China Mobile’s TD-SCDMA, China Unicom’s W-CDMA and China Telecom’s WCDMA2000, among which China Unicom, which had obtained the best license, also surpassed the mobile trend in the 3G era.
Subsequently, the world began to enter the "4G era", this era, usher in a new height of the mobile Internet, and the latest communications protocol is LTE, etc., the communication rate is a substantial increase in speed, the speed is 100Mbps-1Gbps.
In China, there has also been a dramatic change! In December 2013, the Ministry of Industry and Information Technology issued 4G licenses to China Mobile, China Telecom and China Unicom. At this point, the speed of the mobile Internet has reached a new level.
My country is amazing! Is China now leading 5G development?
As mentioned above, from 1G to 4G, it mainly solves the problem of human-to-human communication. In this process, China has begun to make significant progress. In a word, it is summarized as follows: 1G backward, 2G following, 3G breakthrough, 4G synchronization .
At present, the world communication field has entered the “5G era”. The goal of this era is the interconnection of all things. In the coming 5G era, people’s connections are only a small part, and more are between people and things, things and things. connection.
As we all know, 5G communications has become a technological highland for countries and regions to compete for development, and both have tried to have more right to speak in the standard field.
In addition, according to the international consulting agency Ernst & Young, by 2025, the number of 5G users in China will reach 576 million, accounting for more than 40% of the global total; China's 5G capital expenditure will reach 1.5 trillion yuan (US$223 billion).
There is no doubt that China is now expected to lead 5G development, whether it is in the standard competition or the speed of launch of related products. Some Chinese telecommunication companies, including Huawei, vivo, and Lenovo, all expect to launch the first 5G handsets in the second half of 2019. Commercial 5G has already come to a brisk pace.
In addition, currently China's three major operators - Mobile, China Unicom and Telecom have conducted 5G trial network construction in multiple cities and conducted a number of tests. According to the planning of the Ministry of Industry and Information Technology, the 5G related products of supply chain companies will reach commercial capacity by the end of this year, and will be commercialized in 2019, and commercialization will be realized in 2020.
In order to expedite the commercial deployment of 5G systems, the Ministry of Industry and Information Technology of the People's Republic of China (National Radio Office) has also issued a notice a few days ago to request the clearing and verification of radio stations (stations) such as satellite earth stations in the frequency bands of 3400-4200 MHz and 4500-5000 MHz.
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