“Everyone already knows about millimeter wave technology. But recently, millimeter wave and sub-6G are regarded as hot spots for comparison. Some friends think that millimeter wave technology is more advanced, while some friends think the opposite is true.
Everyone already knows about millimeter wave technology. But recently, millimeter wave and sub-6G are regarded as hot spots for comparison. Some friends think that millimeter wave technology is more advanced, while some friends think the opposite is true.
Regarding millimeter wave and Sub-6G, nothing is more advanced. 3GPP defines the frequency range of 5G, which is divided into Sub-6G and millimeter wave. A mobile communication standard must first specify the frequency range of the radio used by this technology. 3GPP is a major patent organization in the world, and it has always been a standard organization for the development of wireless communication systems. The mobile communication networks currently being deployed around the world are basically formulated by this organization.
3GPP defines two FRs (frequency ranges) used by 5GNR. FR1 includes some of the frequency bands used by 2/3/4G, and a new part of the frequency band has been added. The defined frequency range is 450M-6000Mhz. Because the wireless spectrum is in Under 6G, it is also commonly referred to as Sub-6G. FR2 is 24250Mhz-52600Mhz. Because the wavelength of this part of the spectrum has entered the millimeter-level category, it is also called millimeter wave. There is no question of whether millimeter wave and Sub-6G are advanced or not, it is just the choice of different countries.
At present, the main 5G frequency band being deployed and developed in the world is Sub-6G, and only the United States, Japan, South Korea and other countries are developing and testing millimeter wave deployment of 5G. In fact, there is no question of whether it is advanced or not, rather than wireless spectrum resources. The problem of allocation. In fact, the only country that is most enthusiastic and concerned about millimeter waves is the United States. The reason for this is that the US military occupies most of the allocatable spectrum in Sub-6G, and the United States does not have enough wireless spectrum for operators. Therefore, the 5G deployment in the United States has to start with higher frequency millimeter waves.
In fact, for operators, no one wants to deploy 5G from millimeter wave. Radio waves have a characteristic, that is, the higher the frequency spectrum, the worse the diffraction ability and the worse the coverage, especially in urban areas. Millimeter waves, as a super high-frequency radio wave, are actually more It is suitable for hotspot coverage and partially unobstructed indoor coverage. There are too many base stations to be built for outdoor basic coverage, and operators can’t bear it. The millimeter wave is used for outdoor basic coverage, in addition to being blocked by buildings, it will also be blocked by leaves, and even rain.
China’s 5G deployment started with Sub-6G like mainstream countries such as Europe. The millimeter wave has not yet been deployed, and will not be deployed for the time being. In fact, this is not only a dispute over the frequency of 5G base station deployment, but also a dispute over the right to speak in 5G. 5G is a mobile communication system involving the Internet of Things. In 5G, industry applications are the main applications. The current series of products that may involve 5G, whether Sub-6G matures first or millimeter wave matures first, will determine whether China or the United States can occupy a leading position in the 5G mobile communication standard.
The maturity of an industrial chain requires a large amount of capital investment and a large number of products to come out. This can also be said to be a battle for the route of 5G products. Moreover, any early-stage product contains huge research and development costs, and the early-stage product will be very expensive. China is the world’s largest communication system. In fact, whether it is 3G or 4G products, it is in China that bears most of the global R&D costs. It can also be said that China has basically digested the costs of various mobile communication systems after 3G. .
Therefore, all domestic 5G products currently do not support millimeter waves. At the same time, China is still promoting the entire industry chain to reduce the overall cost of the Sub-6G product line in order to occupy a leading position in the future 5G. All in all, there is no question of whether the technology is advanced or not between Sub-6G and millimeter wave. In fact, this is the difference in the direction of 5G R&D and application in the United States, China and Europe. The United States does not mean that millimeter waves are more advanced than millimeter waves. Advanced, but it just cannot allocate enough Sub-6G spectrum to operators.