On June 6, 2019, China Mobile, China Telecom, China Unicom, and China Radio and television officially obtained 5G business license. Within one year of 5G licensing, major operators have completed 5G coverage in key areas in multiple cities.
Miao Wei, Minister of industry and information technology, said that more than 10000 5G base stations should be added every week. In April alone, 5G users increased by more than 7 million, accumulating more than 36 million.
If the 5G spectrum allocated by different operators is different, will there be differences in signal coverage and strength? Now let's take a look at the 5G spectrum distribution of the four major domestic operators:
China Mobile: it has 160M bandwidth of 2515-2675Mhz in the 2.6GHz frequency band, of which 2515-2615Mhz (100MHz) is used for 5G deployment and 2615-2675Mhz (60MHz) is used for 4G deployment.
China Mobile also has 4800-4900Mhz (100MHz) 5G frequency band, or will be used for 5g heating, private network, etc.
China Telecom: 3.5GHz (3400Mhz-3500Mhz)
China Unicom: 3.5GHz (3500mhz-3600mhz)
China Radio and television: 4.9Ghz (4900Mhz-5000Mhz)
Common use of China Unicom, China Telecom and China Radio and television: 3.3GHz (3300Mhz-3400Mhz)
Among them, the 5G frequency band of China Telecom and China Unicom is continuous, and the two have announced to build and share 5G wireless access network based on 3400Mhz-3600Mhz continuous 200MHz bandwidth.
China Mobile and China Radio and television have also announced to share 5G network in 2.6GHz frequency band, and jointly invested in the construction of 700MHz 5G wireless network in the proportion of 1:1, jointly owning and having the right to use 700MHz 5G wireless network assets.
Finally, look at the global 5G overall spectrum resources:
In 3GPP protocol, the total spectrum resources of 5G can be divided into the following two fr (frequency range).
FR1: 450 MHz – 6000 Mhz sub6G frequency band, that is to say, the low frequency band, is the main frequency band of 5G; the frequencies below 3GHz are called sub3G and the rest are called C-band.
FR1 has the advantages of low frequency, strong diffraction ability and good coverage. It is the main spectrum of 5G at present.
N41, n77, n78 and n79 are the mainstream frequency bands of the current test network in China; Sul: supplementary uplink frequency band (used for uplink and downlink decoupling);
SDL: supplementary downlink frequency band (for capacity supplement).
FR2: 24250 MHz – 52600 MHz millimeter wave, that is to say, the high-frequency band, is 5G extended band with rich spectrum resources; the current version of millimeter wave defines only four bands, all of which are TDD mode, and the maximum cell bandwidth supports 400MHz.
FR2 has the advantages of large bandwidth, clean spectrum, less interference, as the extension frequency of 5G.
Increasing the carrier bandwidth is the most direct way to increase the system capacity and transmission rate. In the future, the maximum carrier bandwidth of 5G will reach 400MHz or higher.
At present, n77, n78, n79, n257, n258 and n260 are the most likely 5G frequency bands to be deployed in the world, that is, 3.3Ghz-4.2Ghz, 4.4Ghz-5.0Ghz and millimeter wave band 26Ghz / 28Ghz / 39Ghz.
In China, only the frequency bands in FR1 are allocated, among which the frequency bands supported by the three major domestic operators are as follows.
According to the terminal product planning of China Mobile 2020, 5G terminals should support SA / NSA dual-mode and n41, n78 and n79 frequency bands from January 1, 2020 (n79 frequency band has been extended to July 1), China Telecom clearly requires 5G terminals to support n1 and n78, and China Unicom also requires 5G terminals to support n1 and n78.
N78 is the main frequency band in the world. At present, the 5G pilot in many countries adopts the 3.5GHz frequency band of n78. In China, terminals supporting n1, n41, n78 and n79 are the real all Netcom 5G terminals. When choosing 5G mobile phones, you need to polish your eyes.