For most people 5g must have been heard even if they didnt understand it. But isnt the 4G era just a few years old? Is it a little early to say the next generation of wireless communication technology? Its true but time flies technology development is not waiting for people. 5g mobile communication may come to us soon. Its good to know some knowledge in advance. Maybe you can see some business opportunities in this article. Lets start with some terms. There is no long descxxxxription of wordiness here. You can take it at ease.First lets browse a few key words with Lei Fengs IOT Technology Review: 3G: the third generation mobile communication network. If you dont want to expose your age dont admit that you have come all the way from my site because 3G was born after that era and its representative NOUN is HSPA or HSPA +. 4G: speaking of 4G network you must be familiar with the term LTE. In fact LTE LTE advanced and LTE advanced Pro all belong to 4G. They all have one characteristic - speed. 5g: in fact its a term used in the industry to describe the next generation of wireless communication network but the industry has not yet set relevant standards for it but the speed is 10 times faster than 4G. Millimeter wave: millimeter wave refers to the electromagnetic wave with the wavelength of millimeter and its frequency is generally above 6GHz. Nowadays the commonly used frequency band below 5GHz is very crowded. Where to find new spectrum resources? All major manufacturers come up with the same idea of using millimeter wave technology. Mbps / Gbps: these two terms represent network speed. 4G network must reach 100Mbps 5g requires 1Gbps. However these two standards have little effect on end users because they are only ideal values. Wireless operator: its easy to explain. As long as it can provide wireless network its a wireless operator. In China its mobile Unicom and Telecom. Spectrum: that is electromagnetic spectrum in Hertz including radio microwave VHF UHF etc. Delay: that is the propagation speed of information between two points. In the age of 5g the delay will be further reduced (less than 1ms). Internet of things (IOT): another lousy term. As the name suggests IOT is the Internet connected with things. However from smart phones to refrigerators to smart bracelets to cars it will become a part of the Internet of things. With the development of 5g technology there will be more and more categories of networking devices. 5g whats the biggest change? Speed is only a part of 5g but now this problem has not been settled yet 5g is still in constant change. Nowadays wireless networks (especially in developed countries) are facing serious congestion problems. Taking Los Angeles as an example the so-called 4G network in this area is just too bad. At & Ts LTE speed is less than 1Mbps in the peak period which is not as good as HSPA +. In the next ten years the number of various networking devices will increase geometrically. If the network level remains the same it may not be able to meet the needs of users at all. Although 4G network is not immutable (for example 4.5g is proposed now) its fate has been determined by the limitation of frequency band. 4G will not contain huge data and networking needs in the future. However 5g has the ability to open a new page of wireless network. According to Lei Feng network 28ghz and 60GHz (millimeter wave) are the two most promising bands to be used in 5g. 28ghz The available spectrum bandwidth can reach 1GHz while the available signal bandwidth of each channel in the 60GHz band is 2GHz. In contrast the carrier with the highest frequency in 4G band is above and below 2GHz while the available spectrum bandwidth is only 100MHz. In this way the spectrum bandwidth can be easily doubled by 10 times and the transmission rate can be greatly improved. So how fast is 5g? As mentioned before the standard of 5g is 1Gbps. However in the early stage of 5g network deployment the most important thing is to expand the pipeline. A congested network has no user experience at all. In terms of speed Ericsson has achieved a raging speed of 25gbps in field test. How fast is this? Simply put the existing SATA 3 only supports up to 6gbps and even the latest nvme SSD cannot reach 25gbps. However this is mostly the speed under the theoretical environment. Im afraid that the end users cant experience it after the 5g network is deployed. The cost equipment performance bottleneck and some practical problems will become the obstacles to the high speed of the network. Therefore at present any propaganda over 1Gbps is a hooligan and users can automatically block this part of the content. In addition it should be noted that 5g does not only pay attention to speed but also to the efficiency of the network so the download speed bar is only one of 5gs ostentatious capital. What will happen to 5g baxxxxse station? You must have experienced the scene of surfing the Internet in a buil