Life is endless, tossing. Today, let's talk about the factors that affect our Wi-Fi signal.
If you have ever entered the "192.168.1.1" or "192.168.0.1" URL to set up your own router, you may find similar options.
13 channels, which one should I choose?
What is the channel here? As the name suggests,
it is the path of the wireless signal. all the way to Rome, for most of the domestic routers, Wi-Fi signal to reach your mobile phone total 13, how they are divided out?
Routers transmit Wi-Fi signals in the form of electromagnetic waves, and the most important feature of electromagnetic waves is frequency. Currently, the vast majority of routers work in the 2.4GHz band.
Some routers also work in the 5.8GHz band, such routers are called dual-frequency routers.
As pictured above, the 2.4GHz band is subdivided into 14 different channels, and for our country there are only 13 different channels.
From 2.412GHz to 2.472GHz, every 5MHz is divided into one channel. Some countries can use 14 channels.
The popular point is that each household's Wi-Fi signal is in a called "2.4G" on the road to Gallop, in order to prevent mutual interference and collision, the road divided into 13 lanes, the next door old Zhang's router may use 1 lanes, upstairs old Li's router may use 6 lanes, that means.
So the problem is, if your router uses 6 channels, and your neighbors, upstairs downstairs, add up to dozens of routers, which have more than 10 routers also driving in 6 channels, what will happen at this time?
The problem is that your Wi-Fi signal will get worse and sometimes even fall off, because the 6 channels you use are too crowded and interfere with each other more heavily.
The graph is the author uses the software to detect, the neighbourhood uses each channel the situation.
Why are only 1, 6, 11 channels floating red in the picture above? In other words, why do so many routers choose 1, 6, and 11 channels?
As shown above, although the 2.4G band is divided into 13 channels, each adjacent channel is in fact partially overlapping. In the 1, 6, and 11 channels above, you will see that there is no intersection between these 3 channels. Also
That is, for this reason, if your upstairs neighbor uses 1 channels, the downstairs neighbor uses 6 channels, and you use 11 channels, your interference will be minimal.
Of course, there are other reasons, the router's channel in automatic selection, often default to select these 3 channels.
To compare the influence of the router on the Wi-Fi signal when choosing different channels, I changed the channel to a crowded channel 1. The detected network signal strength is shown in the following illustration:
The signal strength here is " -65dbm", it should be noted that the larger the value, the better the signal, such as the -60DBM signal strength is greater than -65dbm.
When choosing "Channel 1", my wireless signal is worse than the time is " -65dbm", gradually improved, the signal strength will jump to " -57dbm", and the worst time is completely no signal, that is, drop line, of course, the line may also be other reasons.
Then I changed the channel to "13", at which point the signal strength was as follows:
As shown above, the signal strength of a lot of strong, to " -45dbm", such signal strength is relatively good.
Through the experiments above, we can basically conclude that the
Wi-Fi signal differs when the router chooses a different channel.
However, we also have to emphasize that
routers, different network environment, time period is different, its experimental results will be different. For example, in a large shopping mall, if the merchants inside have their own routers, then this interference will be more serious, experimental results will become obvious, such a scene there is a large office area.
Another note that interferes with your Wi-Fi signal is not just someone else's router, but also your own and someone else's Bluetooth headset, Bluetooth keyboard and microwave oven, because Bluetooth and microwave ovens also work near the 2.4GHz band.
After many experiments, the
signal can be increased by at least 5dBm or above when different channels are changed.
If the Wi-Fi signal is great, you don't have to worry about channel selection. Also, if it is too far away from the router, wear more walls, then the impact of the channel is relatively small, you can not worry about. But if you find your home Wi-Fi signal, its strength is not enough to the neighbors, you can try a different channel, such as "13", if not too many people in your nearest neighbourhood to choose channel "13" manually.
Your terminal is more important.
Affect the Wi-Fi signal, in addition to the above "channel" outside, there are other? Of course, moreover, it is very important, after the author's experiment, can be said to be immediate.
What is it? Your terminal.
The above experiment we have identified some of the same conditions, that is, on the channel "13", the author desktop received Wi-Fi signal in the " -45dbm" fluctuation. At that time, the wireless card on the desktop, the antenna is horizontally placed, the following figure:
Now, I'm going to change the antenna from horizontal to vertical, as shown below:
The result made me very surprised. At ordinary times, in order to make the antenna not in the way, many people like me, likes to put the antenna level, that this will not have any impact. However, when I changed the vertical position, the signal increased a lot. The following figure:
Wi-Fi signal from the previous " -45dbm to -50dbm" between a sudden jump to the " -30dbm to -34dbm" between. To be sure, since then, the author on the desktop network card antenna, it will never lie down again.
The above experiment tells us, the
terminal is different, or the terminal placement position is different, the Wi-Fi signal will be different.
This feeling in fact many people have had, to cite a most common example is that the same location, notebook and mobile phone connection with the same Wi-Fi, notebook either browsing the Web or watching the video are very fluent, and the mobile phone to open the speed of the page and playback video fluency are not up to the notebook, This, of course, is because the laptop's wireless card is more powerful.
because of the need to save power, the need to minimize heat, so the ability of the phone to receive Wi-Fi signal is generally weaker than the notebook. of course, if the notebook is super old, and the mobile phone is just out of the high-end section this year, then this feeling may not be so obvious.
The above explanation, the home Wi-Fi signal strong and weak, your terminal influence is also very big. Try this to help improve your Wi-Fi signal.
Finally, this is the most important thing.
Both of these situations are one of the remedial measures taken in the case where the router is fixed, and the most fundamental approach should be to start with the router.
Many times, the author has secretly vowed, if God give me another chance, the next time decorate the house, I must good wiring, to the home router a best position!
Many home Wi-Fi signal, is often the house of joy that worry. For the majority of the two-room, one hall or three rooms of the house layout, where is the router to be happy?
To understand this, we first have to understand the fact that a pupil knows--light travels straight!
Wi-Fi signal is not visible light, but it is the same as the light is electromagnetic waves, are like to go straight, and only go straight line, the attenuation of the signal is the least, and reflection and diffraction, the degree of attenuation of the signal, compared to the increase in distance caused by the attenuation is much greater.
Let's give a few examples.
Some people's routers are placed in the above figure yellow pentagram that position!!
Maybe you think it's funny, how much do you have to be so hostile to the router to put it this way?
In fact, this phenomenon is a lot of, because the yellow pentagram position is the hall, is the place of the household, and decorate the house, some people only pull the network cable to there.
There is, broadband operators to install broadband, for the plan, plus other reasons, broadband line only received the entrance hall, a variety of restrictive factors, resulting in the router can only be placed in the very rotten place, if you want to give that position to play points, also on 30 points.
Let's take a look at the position of 59 points.
As pictured above, this is a slightly less rotten place, this is also most home routers often put the position, because there is a TV wall, network cable interface, considering the TV network cable or something, the router is also placed there. This position allows the signal to be separated from the bedroom by a wall, so fail!
The position of 60 points is shown below:
As above, if the router is placed in the position of the green circle box, there are several places in the Wi-Fi signal that are propagated in a straight line.
If you take into account the longest time in the master bedroom and the computer is in the master bedroom, then the 80-point position should be:
However, for many young parents, the master bedroom for the wife and the baby, and the second bedroom is their real world, office computers, study and so on are set in the second bedroom, at this time, the following placement router is the most perfect:
Of course, the picture above is the author of the home Wi-Fi signal is very miserable, the bitter experience, the plan to solve the problem once and for all. For many people who have not been tossed by Wi-Fi signals, and who are indifferent to what is perfect, you are not qualified to say I am extreme.
In short, it is better
to let the router in distance of four or five meters, or even six or seven meters, also try not to let Wi-Fi signal through the wall-load-bearing wall! Of course, it is possible to wear wooden doors, metal doors can not!
There may be some netizens will think, why so troublesome, Wi-Fi signal is bad, that in the home more than a router to do relay, or directly buy two wireless relay, which house signal poor plug in which room. Brother, I've been through this project, thanks for reminding.
Finally,
for the pursuit of perfection, 120 square meters of the house, can be a normal router to solve the perfect, do not choose what to wear King, or what relay program. Large-room villas are suitable for relaying.
Direction is important, too.
This is the location of the router, however, most of the time, the location of the router can not be adjusted, at this time, if you want to continue to increase the signal of a room, you may take this approach. To facilitate the explanation of the problem, the author of the situation simply drawing the following:
The picture above is where the router should be in my dream, however, for historical reasons, the router is here:
See this picture, how much you should be able to understand my heart for a long time regret. It is separated from the bedroom 2 by two walls, and 1 bedrooms with 1.5 walls.
I've been unable to change the location of the router, but I'd like to add a 1-bedroom signal now.
My router has 3 antennas, vertical, the direction of the router facing the following figure:
Why is this orientation? Because I thought it wasn't important before.
Now, I have to change the orientation, as follows:
As a result, the signal on the original basis, and added a lot, from the original -30dbm to -34dbm between the jumps to the -26dbm between -28dbm. The reason for this figure is as follows:
Through a lot of experiments, we can change the channel, the location of the router, orientation and so on, improve the home Wi-Fi signal is often off the line, so that the Wi-Fi link more smooth, but also with contact with the hearts of young people.
Once, take his girlfriend home, her mother said a sentence even I touched the words: "Even my home Wi-Fi, you are our family!" "(also a network joke)
About the Wi-Fi signal of those things, in fact, there are a lot to talk about, if you are interested, continue next time.
Note: the software for detecting channel and signal strength is wirelessmon and has a 30-day probation period.
