关于5g的英语作文
For most people 5g must have been heard even if they didn't understand it. But isn't the 4G era just a few years old? Is it a little early to say the next generation of wireless communication technology? It's true but time flies technology development is not waiting for people. 5g mobile communication may come to us soon. It's good to know some knowledge in advance. Maybe you can e some business opportunities in this article. Let's start with some terms. There is no long descxxxxription of wordiness here. You can take it at ea.First let's brow a few key words with Lei Feng's IOT Technology Review: 3G: the third generation mobile communication network. If you don't want to expo your age don't admit that you have come all the way from "my site" becau 3G was born after that era and its reprentative 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 it's a term ud in the industry to describe the next generation of wireless commu
nication network but the industry has not yet t 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 ud 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: the two terms reprent network speed. 4G network must reach 100Mbps 5g requires 1Gbps. However the two standards have little effect on end urs becau they are only ideal values. Wireless operator: it's easy to explain. As long as it can provide wireless network it's a wireless operator. In China it's 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 what's the biggest change? Speed is only a part of 5g but now this problem has not been ttled yet 5g is still in constant change. Nowadays wireless networks (especially in developed countries) are facing rious congestion problems. Taking Los Angeles as an example the so-called 4G network in this area is just too bad. At & T's 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 increa geometrically. If the network level remains the same it may not be able to meet the needs of urs at all. Although 4G network is not immutable (for example 4.5g is propod 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 ud 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 ur 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. I'm afraid that the end urs can't 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
prent any propaganda over 1Gbps is a hooligan and urs 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 5g's ostentatious capital. What will happen to 5g baxxxx station? You must have experienced the scene of surfing the Internet in a building with thousands of people or watching Internet TV in prime time. Small cell (small baxxxx station) can solve this problem. In fact the industry has made an attempt in the 4G LTE era but 5g can push this concept to a distance becau it can solve the problem that small cell still needs wired network. It can be predicted that in the future there will be countless such small baxxxx stations in the high-ri city 5g will also be co operated by large and small baxxxx stations (previously reported by Lei Feng). For example you only need to deploy a 5g baxxxx station on the roof of the building to solve the limitation of the limited network capacity of the original large baxxxx station. It can not only expand the network coverage but also improve the network capacity. In theory 5g network can realize the distributed network model in the urban environment with high density. In addition the arrival of the network can also make all kinds of physical cable completely laid off. Becau of the huge advantages of bandwidth and speed 5g can provide network connection for a large number of devices in
a small area in theory so people gathered in Times Square for the next year don't have to worry about the lack of cell phone signal anymore they can even do live broadcast easily. However at prent most of 5g terminal applications are only operators' assumptions and the data live in theory. So 5g will replace 4G? Similar to the answers to the above questions the answer to this question is also ambiguous becau experts in the industry have no exact answer. In the future 5g may replace 4G or merge or coexist with 4G network. Some operators may u 4G + 5g gimmick to attract urs which may mean that 9g network has arrived for some technical Xiaobai. In my opinion 5g network will be ud with existing 4G network for a long time (at least 10 years) becau of the worrying signal coverage and wall penetration capacity above 6GHz. At prent unlike the previous large signal towers 5G networks rely mainly on smaller local access points to provide connections but the access points are less powerful in coverage. So when you walk out of a building with millimeter wave 5G 4G access points I'm afraid the cell phone will jump back to the network. However in denly populated urban areas the 5g network can take the lead And 4G will become supplement .
In general 4G and 5g will take much longer to fight side by side than 3G + 4G. In Qualcomm's Roadmap 5g will not be officially launched until 2020 while 4G network will be very mature by then. Through technical improvement it will enter the 4.5g era and integrate with 5g in some parameters and technologies. Therefore the boundary between 4G and 5g will be gradually blurred in the future. Who will be the first to u 5g network? This problem is still in doubt becau there are many operators in the world who have claimed that they have mastered 5g technology but it is unclear when they will be launched to the market becau no one knows whether the operators are blowing the air for market publicity.
In addition as mentioned above 5g is not clearly defined so only the operators themlves know whether the standards in the operator interface meet the requirements of 3GPP. It is safe to say that
5g network will be officially launched at least by 2020. In this way 5g is far from the formal combat effectiveness but don't be discouraged. After all 4G has not been born for a long t
ime and it has great potential for improvement. Maybe when 4.5g is born as an appetizer you will be a little excited.
