The biggest pain point of WiFi in the past has finally been solved by WiFi7. . .
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I have to mention the guy who named the 802.11ax protocol WiFi 6.
Must be a genius!!!
Because if it weren't for those people who tinker with these things every day.
Who knows what 802.11n, 802.11ac, 802.11ax, 802.11be are? Which one comes first and which one comes later? . .
Not like now after the changes.
WiFi 4，WiFi 5，WiFi 6，WiFi 6E，WiFi 7 。。。
Look at this clear naming, it’s such a beautiful thing.
Hey wait, I just bent down to pick up a piece of chalk, how come WiFi has already been upgraded to version 7?
When I bought a router a few days ago, I felt that the manufacturer still used "support for WiFi 6" as a slogan...
Sure enough, with this new name... the iterative relationship between each generation is clearer.
However, with the technological update, the sense of urgency of being "eliminated" was also immediately arranged.
So the question is, is this WiFi 7 useful?
How many surprises will it bring us?
>/ The first thing to bear the brunt is getting up quickly
As a new generation of WiFi standard, it goes without saying that it has higher speed and lower latency .
If the improvement is not obvious, it would be too much of a disrespect to the big guys at IEEE (WiFi 7 is also called IEEE802.11be).
Tony has looked up some information here. According to the theoretical technical indicators of WiFi 7, he will calculate for everyone to see what level its theoretical speed can reach.
If Tony's calculation is incorrect, you are welcome to correct it in the comment section.
First of all, this time WiFi 7 can support up to 4096 QAM (which can be understood as an increase in the transmission signal density), which is about 20% higher than the 1024 QAM of WiFi 6 .
Compared to WiFi 6, WiFi 7 can also support 6 GHz, and the maximum bandwidth it can provide is increased from 160 MHz to 320 MHz. In theory, the transmission speed can be doubled .
WiFi 7 can also support up to 16 antennas for sending and 16 antennas for receiving signals (16 x 16), which is twice as much as the previous generation standard of 8 antennas for sending and 8 antennas for receiving signals .
After a rough calculation, if the above three indicators can be maximized , the theoretical maximum speed of WiFi 7 can reach:
9.6 Gbps x 1.2 x 2 x 2 = 46 Gbps
Like Tony, he needs to download Genshin Impact every time he tests a new device, if the office with the bad review is equipped with a full set of WiFi 7 network.
Then the time required to download a 13GB version of Genshin Impact may only take 2.26 seconds . . .
Well, in theory...
>/ This time the WiFi is a little smart
Don’t be fooled by the fast theoretical speed calculated above. We have a scale in our hearts, and the theoretical speed can only be regarded as a theoretical speed.
Look at how good WiFi 6 was back then, supporting up to 9.6 Gbps. But now not many people can run at this speed, so a 90% discount is not too much.
How much you can actually achieve depends on your home broadband speed and the complexity of the nearby network environment.
The same is true for WiFi 7.
However, although we cannot reach the theoretical speed, the improvement in network experience brought to us by WiFi 6 is real.
A big part of the reason for this is that WiFi 6 supports dual-band signals for the first time.
What is a dual-band signal? When many friends turn on their home WiFi, they may find a small problem.
How come there are two WiFis with the same name but different suffixes?
That’s right, these are the 2.4GHz and 5GHz frequency bands supported by WiFi 6. So why does this make us happier when surfing the Internet?
Tony used his own home as an example. When he opened the WiFi channel map, he saw that the frequency band above 2.4GHz was fully occupied.
Even a person who knows nothing can feel the network congestion from this picture. Everyone is squeezed together.
But switching to the 5 GHz band looks much clearer.
Let us add a little knowledge here. Generally speaking, the larger the number on the frequency band, the faster the signal communication, but the weaker the signal's anti-interference ability .
That is to say, once the indoor terrain is complex (with many walls), the 5 GHz signal strength will be greatly weakened.
Although WiFi 6 can support 2.4 GHz and 5 GHz, its switching between these two frequency bands does not seem to be very smart.
For example, if you connect to WiFi 6 next to the router in the living room, the system will assign you to the 5 GHz band because there is no interference.
As you move towards the bedroom, as there are more and more walls, the signal becomes worse and worse until the 5 GHz signal can no longer hold up. At this time, the phone can automatically switch to 2.4 GHz.
It seems quite smart, if it were the other way around...
The phone will not automatically switch from 2.4 GHz to 5 GHz.
Therefore, under the WiFi 6 protocol, the network speed is greatly improved through the 5 GHz frequency band.
However, there is a lack of a flexible and intelligent scheduling model to connect them.
In most cases, you still have to separate the 2.4 GHz and 5 GHz frequency bands and connect them manually according to your needs.
The frequency bands supported by WiFi 7 are even higher. It can simultaneously support the three frequency bands of 2.4 GHz, 5 GHz, and 6 GHz (6 GHz has not yet been approved in China).
Note! This is slightly different from WiFi 6, which supports both.
This means that this time WiFi 7 can support automatic switching of these three frequency bands!
It can automatically swing the signal to the appropriate frequency band according to the strength of the signal.
It can also achieve "self" load balancing and use the advantages of its own multiple channels to transmit data concurrently.
This means that the problem that has troubled WiFi 6 has suddenly been solved.
>/ Use your wisdom to the fullest in a complex environment
Not only does it support more frequency bands for receiving signals, but WiFi 7 also optimizes support for multiple APs. (We can roughly understand it as supporting multiple routers)
This is a very interesting feature.
Due to power limitations, the signal coverage range of a single router is very limited.
This is also the reason why sometimes only one router is installed at home and it is impossible to provide signal coverage throughout the house.
In larger scenarios such as companies or exhibitions, if you want to obtain a large-scale stable signal, it is generally achieved through AC + AP or MESH networking.
That is, using multiple network nodes to provide huge coverage.
But there are also certain disadvantages to doing so.
In standards before WiFi 7, each AP could not collaborate with each other, but " fight on its own ", and a mobile phone could only communicate with one AP at a time.
When you walk from "AP No. 1" to "AP No. 2", the system will first kick you off "AP No. 1" when it detects that the signal is getting weak, and then establish communication with "AP No. 2".
With the help of WiFi fast roaming protocol (802.11k/v/r), we can have a nearly seamless AP switching experience.
But inevitably there will still be a moment of lag.
With WiFi 7, it can simultaneously support the signal input of multiple AP nodes .
Under this standard, the WiFi signal received by a mobile phone can be provided by multiple signal sources at the same time.
When you move around, it can reduce the signals of APs that are getting farther and farther away, while allowing you to receive new AP signals that are getting stronger and stronger.
It's like the swimming pool in elementary school math problems that is draining water on one side and storing water at the same time.
The water level (WiFi signal) can be dynamically stabilized, thereby optimizing the lag at that moment.
>/ Do we need WiFi 7 now?
However, although so many new features of WiFi 7 are mentioned above, to be honest, the implementation of WiFi 7 is still quite far away from us.
Don’t be fooled by the fact that MediaTek, Qualcomm, H3C and others have all “ first launched” WiFi 7 from various angles recently.
However, after this technology is implemented and transformed, and a series of operations are completed, if we really want to experience WiFi 7, we may have to wait until 2024.
Moreover, what has been released now are only the servers , and terminal products that can truly support WiFi 7 have not yet been rolled out.
And don't forget, every time new technology comes out, the price is not good.
WiFi 6 Router Price Reduction Guide ▼
In fact, some of the functions in WiFi 7 can be found in the WiFi 6E standard released two years ago.
For example, it supports 6 GHz and 4096 QAM, which can bring us a higher Internet speed experience.
If you really need a faster internet speed, you might as well buy a WiFi 6E router to try it out. (Although the price is not cheap.)
From this perspective, we don’t need to rush to wait for WiFi 7.
However, we will always need WiFi 7.
After all, it will take three or four years for this technology to be implemented. By then, perhaps AR, VR, MR, the metaverse, or even some new things have not yet been born.
There will always be someone who can make WiFi 7 serious.
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