With 5G, everything can be connected to the Internet (IoT), bringing a better smart life, and new technologies such as VR, AR, 4K, and 8K have a 5G bandwidth blessing, which can bring a better audio and video experience to human beings. Really?
The vendor talks about 5G as the savior of so many applications, because the bandwidth is getting higher, you can Deliver these large amounts of traffic in real time,Then these applications will be very popular. But these beautiful visions can't be done now, is it because 4G bandwidth is not enough? It is not obvious!
The main reason why the Internet of Things is not popular is that everything The new value generated by the Internet is lower than the cost.
The main reason why VR and AR are not popular is that the device is too expensive and there is no killer application.
The main reason why 4K and 8K are not popular is that the device is too expensive, has no content, and the user does not feel the difference in image quality above FHD resolution.
If all of the above key factors are resolved, it is true that these applications will use higher network bandwidth, but not necessarily mobile network bandwidth. At present, many people's home networks have reached 100Mbps. Let these people be willing to watch VR and 8K on the sofa, and then think about why they should go on the road and use 5G to do these things.
What is the significance of 5G in front of us? We look at the two network categories from a mobile perspective:
Mobile Network: It is the 4G that is commonly used nowadays, and the much-anticipated 5G. It features wireless, and users will make long-distance (more than a few kilometers) mobile. Indoor and outdoor, mobile phones are representative applications. In general, the 4G rate is 100Mbps, and the 5G rate is 1Gbps. But in an ideal environment, because the mobile environment is easily affected by shadowing or distance, 50% of the speed is generally ideal.
Spot network: Simplified is the combination of Wi-Fi and wired networks, formed at fixed points (usually within buildings) A stable and high speed network. In Taiwan,The average person can apply for 1Gbps fiber home, and Japan, South Korea, Hong Kong even have 10Gbps service. The 1 Gbps class of Wi-Fi 5 has become popular, and the 10 Gbps class of Wi-Fi 6 is just beginning to enter the market. That is to say, it is not difficult for an average person to have a fixed-point network of 1 Gbps.
The significance of 5G is to increase the speed of the mobile network as fast as the fixed-point network, and to serve a large number of connections at the same time.
So 5G can replace the fixed-point network, but the stability will be poor.
When the location is not convenient to set up the network, it is not so stressful for network stability, and when the 4G network speed is not enough, it is suitable for 5G. For example, if you are doing short-term activities in one place, there are 1000 people participating, and there is no ready-made network.Then connect the Wi-Fi to the user with a 5G sharer.
It sounds very weak, and has nothing to do with the average person? Yes, so the manufacturer pulled out the application of VR, AR, 4K, 8K, it sounds like Wei.
So 5G is useless to the average person? Not right. According to Open Signal's network experience report, the average 4G speed in Taiwan is about 30Mbps. This speed is very sufficient, but it will not be enough in extreme conditions, such as when you are driving a bus during commuting time, due to the network. It is shared. In a small area, a lot of people are crowded, and the bandwidth allocated by each person will be small enough to be used, or even not even.
There is only two meanings of 5G:
Inconvenient setpoint network Where high-speed networks are needed,Can use 5G.
In an extremely crowded situation, it can provide good enough mobile network quality.
In the next year, 5G is just that. After that?
Let’s take a look at what the vendor claims (Internet of Things) IoT, VR, AR, 4K, 8K.
First of all, it is unreasonable to look at 4K and 8K in a mobile environment. Because of the size of the mobile phone, the resolution above 1080P cannot be seen by the human eye. It is reasonable to distinguish that 4K and 8K should be viewed indoors with large-size TVs.
And VR should be used indoors, because after wearing VR glasses, you can't see the external environment, there is no need to use VR outdoors.
The above two categories must be used indoors, that is, using a fixed-point network instead of 5G is reasonable.
The rest of the Internet of Things and AR.
The Internet of Things is a big category, and the device is highly variable. Refrigerators, electric lights, electric meters, automobiles, industrial equipment...all must be called IoT. But as mentioned before, 5G is not the first high-speed network of 1Gbps, but a high-speed mobile network. It should use a fixed-point network such as fiber + Wi-Fi indoors, and its stability is much greater than 5G. In short, 5G should not be used in all long-term indoor IoT.
What are the outdoor IoTs? Cars, traffic signals, monitoring cameras, etc. However, the car is not suitable for 5G, mainly because of the poor penetration of 5G signals.When the car is moving in different places, the signal will be good or bad, and the stability is not ideal. It is better to use 4G.
There are some online articles that mention that 5G's network latency is very small and is suitable for Internet-connected applications that require rapid response. wrong. The latency of 4G is 0.05 seconds. In fact, it is fast enough. The biggest problem of mobile network is not latency but stability. A signal instability is a few seconds of stuck, and due to physical characteristics, 5G signals will wear better than 4G. The permeability is much worse and it is more likely to be unstable.
Outdoor fixed-point IoT is a suitable scene for 5G. For example, an outdoor surveillance camera is very suitable for 5G because its traffic is large and it is fixed. If it has been confirmed The signal of the point is good, and the stability of the signal is relatively unchanged. However, if the manufacturer to be a surveillance camera does not have to wait for 5G, the average streaming video stream of 1080P is about 3Mbps.Now 4G is enough, you can start with 4G, and then 4G will be used more and more full, the bandwidth is not enough, and then upgrade to 5G.
What about AR? In the long run, I think this is the most probable use of 5G new generation applications, or it should be said that "smart glasses" may be The most revolutionary application of 5G is needed. This topic is more complicated, and I will write a special article to discuss later.
What new applications can 5G bring to us in two or three years?
Let's take a look at the network speed and application comparison to understand the bandwidth needs of ordinary people.
Viewing 1080p streaming movies takes about 3Mbps. This current 4G is doing very well.
Watch 8K streaming video, about 100Mbps.
Currently blur the experience of the Drive and the local hard drive The gap is a qualitative change brought by 5G. Hereinafter referred to as "non-sense drive".
This has several benefits:
Local device can do more light and power saving And can store an equivalent amount of data
100% of the data, all in the cloud
In the actual application scenario,The effect is:
Different devices of the same user, regardless of phone or computer, share 100% of the same data. Unlike most people who use Drive today, they mostly put some of the selected content in the cloud. When there are more devices, the selection criteria are not good, and there will be data loss and synchronization.
A further possibility is that the software no longer needs to be installed. Anyway, the speed of downloading and installing in real time is as fast as that installed locally.
Further, since Drive is as fast as the local hard drive, simply move the operating system (OS) to the cloud! That means, no matter what you Using computer hardware provided in different places such as homes, libraries, restaurants, etc., all download the same OS from the cloud for you to use, you can get the same experience.
Different user data, 100% can be used by the same big brother (Google, Microsoft, Dropbox...), Big Brother gets more Big Data, then there are more potential The AI application may appear.
Although some people will question whether there will be privacy issues, but as most of them now People's emails are seen by Google, but everyone feels very used. Historical facts tell us that as long as the benefits are large enough, consumers do not care so much about privacy.
The second qualitative change brought by 5G is that the local computer is no longer a computer, just play the role of image player. Hereinafter referred to as "full-time cloud computing".
meaning that the local computer on the user's hand (in a broad sense, including mobile phones, computers, smart TVs, etc.),Instead of burdening the calculation work, the user's operation signal is transmitted to the supercomputer in the cloud, and the cloud transmits the calculated picture back to the computer on the user's hand, so the local computer can do very positive spring. As long as it is responsible for display and input, reducing cost and volume, there is an advanced computer/mobile phone performance experience.
A similar application existed more than a decade ago, but it has not been popularized, such as the "remote desktop" of windows, which is still professional. Engineers use them for professional purposes. "Cloud Games" is a hot area. AsLive provided such services as early as 2010, including Yahoo, Sony, NVIDIA, and Google's upcoming St
For "full-time cloud computing", 4G network speed has already provided a good experience. (Source: IoT Home Network) But 5G can ensure thatEven if more people use these new applications later, there will be no traffic jam problems, increase market opportunities, make manufacturers more motivated to invest more resources, and have the opportunity to form a popular ecosystem.
Last come to the conclusion:
5G will not bring about an immediate breakthrough, It is a fixed-point network that is less stable. It is more reasonable to use scenes that are fixed outdoors, including outdoor fixed-point activities, outdoor surveillance cameras, and so on.
The impact of 5G in the next two or three years is mainly to make the products with mature technology but the market is still immature, and have a chance to succeed. Including non-sense drives, full-time cloud computing, and more.
In the longer term, future AR glasses or smart glasses, combined with 5G and AI, will be a revolutionary breakthrough in smartphones.