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Possible sources of interference affecting the operation of Wi-Fi wireless networks!
As you know, in wireless networks, radio waves (radio air) are used as a signal propagation medium, and the operation of devices and data transmission in the network occurs without the use of cable connections.
In this regard, the operation of wireless networks is affected by a greater amount of various kinds of interference.
The most common reasons that affect the operation of Wi-Fi (IEEE 802.11b/g/n) wireless networks are:
1. Other Wi-Fi devices (access points, wireless cameras, etc.) operating within the range of your device and using the same frequency range.
The fact is that Wi-Fi devices are subject to even small interferences that are created by other devices operating in the same frequency range.
Wireless networks use two frequency bands - 2.4 and 5 GHz. 802.11b/g wireless networks operate in the 2.4 GHz band, 802.11a networks operate in the 5 GHz band, and 802.11n networks can operate in both the 2.4 GHz and 5 GHz bands.
In the 2.4 GHz band, 13 20 MHz (802.11b/g/n) or 40 MHz (IEE 802.11n) channels are available for wireless networks with 5 MHz intervals between them. A wireless device using Wi-Fi on one of the 13 frequency channels creates significant interference on adjacent channels. For example, if the access point uses channel 6, then it interferes strongly on channels 5 and 7, and, to a lesser extent, on channels 4 and 8. To avoid mutual interference between channels, their carriers must be separated from each other at 25 MHz (5 inter-channel intervals).
The figure shows the spectra of 11 channels. Color coding denotes groups of non-overlapping channels - [1,6,11], [2,7], [3,8], [4,9], [5,10]. Different wireless networks located within the same coverage area should be configured for non-overlapping channels.
To determine if there are other Wi-Fi devices operating within the range of your device and using the same frequency range, you can use the InSSIDer program.
InSSIDer is a free utility that scans available Wi-Fi networks and provides a lot of useful information about them, such as signal strength, router MAC address, router manufacturer, channel in use, SSID or public network name, security type, network speed and much more. other. In addition, signal strength can be monitored using visual graphs in real time (download here).
2. Bluetooth devices operating within the coverage area of your Wi-Fi device.
Bluetooth devices operate in the same frequency range as Wi-Fi devices - 2.4 GHz, therefore, may affect the operation of Wi-Fi devices.
3.Large distances between Wi-Fi devices.
Keep in mind that Wi-Fi wireless devices have a limited range. For example, a home router with an 802.11b/g Wi-Fi access point has a range of up to 60 m indoors and up to 400 m outdoors.
Indoors, the range of a wireless access point can be limited to a few tens of meters - depending on the configuration of the rooms, the presence of solid walls and their number, as well as other obstacles.
4. Obstacles.
Various obstacles located between Wi-Fi devices can partially or significantly reflect / absorb radio signals, which leads to partial or complete loss of the signal.
In cities with high-rise buildings, buildings are the main obstacle to the radio signal. The presence of solid walls (concrete + reinforcement), sheet metal, plaster on the walls, steel frames, etc. affects the quality of the radio signal and can significantly degrade the performance of Wi-Fi devices.
Indoors, mirrors and tinted windows can also cause radio interference.
5. Various household appliances that work within the coverage area of your Wi-Fi device.
We list household appliances that can cause a deterioration in the quality of Wi-Fi communication:
• Microwave ovens. These devices may weaken the Wi-Fi signal strength as they usually also operate in the 2.4 GHz band.
•Baby baby monitors. These devices operate in the 2.4 GHz band and give interference, resulting in poor Wi-Fi connection quality.
Shahbazi:
Baku city, Yasamal district, Inshaatchilar ave. 81
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Baku city, Nasimi district, st. G. Aliyeva 1
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Baku city, Narimanov district, st. Tabriz 105/35
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Baku city, Surakhani district, st. Hovsany settlement (Yeni Hovsany 1)
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Baku city, Baladzhary settlement, st. Natavan 7
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Baku city, Garadagh district, Sahil settlement, st. M. Seyidov 21
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Baku city, Garadagh district, Lokbatan settlement, st. A. Mammadova 1
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Baku city, Absheron district, Khirdalan, st. Galubia 1
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Baku city, housing and communal services building of Yasamal district
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Baku city, Yasamal district, st. A.M.Sharifzade 177A
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Baku city, st. Purple 28
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