Introduction to wireless routing signals

The stability of the wireless network depends largely on the wireless routing signal. Let's talk about this. According to the specific analysis of wireless route signal transmission, some answers are provided to a user's question about the wireless route signal when using the router, but they are not very detailed, there are still many questions about wireless routing signals, and we hope that experts can provide some brilliant solutions.

From dial-up access to Wired Broadband, from Wired Broadband to wireless networks, the development of the network is changing with each passing day. With the gradual maturity of wireless network technology, the price of wireless network equipment is getting lower and lower, and there are no fewer households that build wireless LAN at home.

However, most consumers may not know much about the transmission principle of wireless networks and how to increase the coverage of wireless signals. So let's have a chat today. Let's take a look at the principles of wireless networks.

Wireless networks are a product of the combination of computer networks and wireless communication technologies. They provide an effective method to support communications between computers using wireless multi-access channels, it also provides potential means for mobile, personalized, and multimedia applications of communication. Generally, any computer network that uses wireless transmission is called a wireless network.

From WLAN to Bluetooth, from infrared to mobile communication, all of these are examples of wireless network applications. It does not use traditional cables to provide all functions of traditional wired LAN. The infrastructure required by the network does not need to be buried in the ground or hidden in the wall. The network can be moved or changed as needed. To put it bluntly, it is the Wireless connection form of the LAN, that is, the Wireless Local-area Network (WLAN). We often see that WLAN refers to the Wireless Network.

Principles of wireless route Signal Transmission

Similar to a common wired network, a wireless LAN uses an ISO/RM layer-7 network model, which is only in the two lowest layers of the model: Physical Layer and data link layer, wireless transmission is used. Although the standards and specifications of various types of wireless networks are not uniform at present, the transmission methods must be one of the following two types: radio wave mode and infrared mode.

The infrared transmission method is currently the most widely used wireless network technology. Currently, almost all Home Appliance Remote controls that are frequently used in household appliances use the infrared transmission technology. As a wireless LAN transmission method, the biggest advantage of infrared transmission is that it is not affected by radio waves, and the use of infrared rays is not restricted by the National Radio Management Board.

However, the transmission quality of infrared transmission is greatly affected by the distance, and the penetration of infrared rays to non-transparent objects is also very poor, this directly causes the infrared transmission technology to become the main character in the computer wireless network. In contrast, radio wave transmission is widely used. Radio waves are used for transmission, which not only covers a large scope and has a high transmit power, but also features concealment and confidentiality. It does not interfere with systems of the same frequency and has high availability.

Many users may have this question: is there any radiation in the wireless network? The answer is yes, but you can rest assured that the average output power of a wireless LAN device is less than mW. Let's make a comparison: when we call or send text messages via a mobile phone, the output power range is 600 mW, and the handheld walkie talkie may reach 5 W. Wireless LAN devices have much lower output power than the above two products, and wireless LAN does not need to be as close to the human body as a mobile phone or walkie talkie, so there is no need to worry too much during use.

Some friends always complain that their products are too small to transmit, there is a dead-end signal in the house, or they are often unstable or disconnected. In fact, the range of 54M products is almost the same. If there is no interference, several hundred meters will not be a problem. But it is placed at home, with too many obstacles, glass and walls. In fact, the most intense blocking signal is the metal. If there are many metals in your load-bearing wall, it is normal that the signal is much weaker. However, a vro is enough for a 100-square-meter house.

Many of my friends who set up a wireless LAN complained that the coverage of their home wireless route signal was too small, there was a dead-end signal in the house, or the network was unstable and often dropped. In fact, currently, 54M wireless routing signals commonly used by households cover a wide range of ordinary families.

However, in actual use, the signal may be affected by some objective factors such as the environment, which is unavoidable. There are too many obstacles in the House, and glass and walls will cause attenuation of wireless signals. In fact, the most intense blocking signal is the metal. If there are many metals in your load-bearing wall, it is normal that the signal is much weaker. However, a vro is enough for a 100-square-meter house.

Generally, a common user has one or two-bedroom homes. If the AP or wireless route signal is placed in the corner of the room, it is usually necessary to transmit the AP or wireless route signal to another room across several walls, some are load-bearing walls, some are non-load-bearing walls. As wireless signals spread out in a straight line, the signal strength of wireless communication will be weakened if obstacles are encountered during transmission.

Since wireless signals pass through obstacles, especially after metal, the signal will be greatly reduced. In our home house, there are many reinforced concrete walls, so when we place wireless routing signals, we should make the signals as few as possible to cross the walls.

When setting up a wireless network, it is ideal to place the wireless routing signal at the interchange of several rooms. That is to say, do not select a corner of the room to place wireless devices, because the wireless transmission distance claimed by the manufacturer is tested on the signal coverage radius ideally, if you put the wireless device on one side of the room, the coverage area is half as small as that in the middle of the room, so we only need to put the wireless device in the living room.

In addition, interference from electrical appliances to wireless networks may also result in signal instability. In real life, we find that microwave ovens may have an impact on signals when working, as long as they are far away. Wireless products do not affect electrical appliances, because Wireless frequencies are different from those of TVs, radios, and wireless phones with GHZ cordless phones. However, if the wireless route is too close to the radio or television, the TV screen may be affected and there may be noise or noise.

If the location of our wireless route is reasonable and the signal penetration problem is solved, but the signal transmission is still unsatisfactory, how can this problem be solved? In fact, this problem is actually caused by channel conflicts and wireless signal crosstalk.

In general, there are 11 54M wireless signal channels. If there are some special devices that can be expanded to support 13, the channels are 1 to 13 in sequence. When multiple wireless signals use the same wireless signal channel, signal interference occurs. After purchasing a wireless router, many users do not modify the wireless signal channel. In this way, all users use the channel in the default configuration of the router, which is prone to channel interference. If nearby neighbors use the same channel as ours, our wireless signals will be affected.

In this way, when multiple wireless route signals use the same wireless channel, there will be more or less interference in wireless signal transmission. For example, if both the neighbor and you use Channel 7, the signal strength of both wireless networks will be affected. We can also use Network Stumbler to scan the room and find out which wireless signals are nearby and which channels are used before using the wireless Network. Even if the wireless signal does not broadcast the SSID and performs WEP and WPA encryption, it can be scanned through Network Stumbler.

We also need to tell you that the wireless routing signal of a channel will interfere with the two adjacent channels at the same time, that is, the signal of Channel 6 will affect Channel 5 and channel 7, therefore, when setting a wireless channel, we should try to keep our channel above two other signal channels.

In addition, there is another way to enhance the coverage and intensity of the wireless routing signal, that is, to expand the antenna DIY and change the antenna gain. Now many forums or websites on the Internet have wireless enthusiasts to change their own antenna tutorials. If you are interested, you can go and have a look at them. We will not be so arrogant here. In short, we can use what we have learned to change the range and signal strength of wireless networks, and use our various Wireless terminals to enjoy the fun of wireless networks.