Many users, when entering the settings of their wireless router, encounter a mysterious operating mode called BGNThis parameter often causes confusion, as it has no direct equivalent in everyday communication, unlike the speed standards we are accustomed to. In fact, this acronym conceals a set of technologies that ensure the compatibility of your equipment with devices of different generations. Understanding that What is bgn wifi? and how it works will allow you to significantly improve the stability of the connection in your home.
The acronym stands for three different IEEE 802.11 wireless standards: b, g, and n. When the router operates in mixed mode, it simultaneously supports older devices released over a decade ago and modern smartphones. Ignoring These settings may cause the network to operate inefficiently, constantly switching between protocols or creating bottlenecks in data transmission.
In this article, we'll take a detailed look at the technical details of each component of this setup, examine the advantages and disadvantages of mixed mode, and provide practical setup tips. You'll learn when it's best to leave things as is, and when to go for it. forced Switching to a specific standard will be the only solution to speed problems.
BGN abbreviation and history of standards
To understand the essence of the mode, it is necessary to turn to the history of the development of wireless technologies. Letter B stands for the 802.11b standard, introduced back in 1999. It was the first widely adopted protocol, providing data transfer rates of up to 11 Mbps at 2.4 GHz. Despite its archaic nature by today's standards, devices operating exclusively on this standard are still found in budget IoT gadgets, such as smart plugs or older security sensors.
Letter G refers to the 802.11g standard, introduced in 2003. It brought a significant performance boost, increasing the maximum speed to 54 Mbps while maintaining full backward compatibility with the previous generation. This standard became dominant in the mid-2000s and remains the baseline for many simple devices that don't require high channel bandwidth.
The most modern part of the abbreviation is the letter N, which complies with the 802.11n (Wi-Fi 4) standard. It features MIMO (Multiple Input Multiple Output) technology, which allows for the use of multiple antennas for simultaneous data transmission. This allows for a theoretical speed increase of up to 600 Mbps and improved signal coverage. The mode BGN This means that your router is ready to communicate with any of these devices, automatically selecting the appropriate communication language.
β οΈ Attention: Mixed Networking (BGN) can reduce overall network speed to the level of the slowest connected device. If a device with the B standard appears on the network, it can slow down data transfer for all other clients when it's active.
Technical features of operation in mixed mode
When you select a mode 802.11 b/g/n mixed In the router interface, the access point begins broadcasting special service packets (beacon frames) that inform all devices within range of its capabilities. Client devices scan the airwaves, find the network, and determine which standard they can operate on with maximum efficiency. This process is called rate negotiation or rate adaptation.
The main difficulty lies in the protection mechanism for older devices. Since standards B and G use different signal encoding methods, the router is forced to pause and send special CTS/RTS frames so that the "old" device understands that the channel is busy and does not start transmitting at the same time as the "new" device. This creates additional overhead, known as overhead, which reduces the actual throughput of the channel.
From a physics perspective, all three standards operate in the 2.4 GHz range, which is divided into several channels. Channel width In N mode, the channel can be 20 or 40 MHz, while B and G only operate at 20 MHz. If a router is forced to serve B/G clients, it often automatically narrows the channel to 20 MHz to ensure stability, which automatically limits the speed even for modern laptops.
Comparison of BGN with other Wi-Fi operating modes
In the settings of most routers, whether it be Keenetic, TP-Link or Asus, the user is offered several wireless network operating mode options. Selecting the wrong option can result in either a loss of connection with older devices or unreasonably low internet speeds. Let's examine the main differences.
Mode B/G Mixed Completely eliminates the N standard, limiting the maximum speed to 54 Mbps. This is only practical in very specific cases, such as creating a guest network with limited access or supporting extremely old equipment that conflicts with the N protocol. In today's environment, this is almost always a suboptimal choice.
Mode N Only (or 802.11n only) disables support for legacy devices. This is ideal for improving performance, as it eliminates the need for security mechanisms for older standards. However, if a phone from 2008 or a cheap IP camera attempts to connect to such a network, it simply won't see the network or won't be able to authenticate.
| Work schedule | Max. speed (theoret.) | Compatibility | Recommendation |
|---|---|---|---|
| 802.11 B/G/N Mixed | up to 600 Mbps | Complete (old and new) | Default for home |
| 802.11 N Only | up to 600 Mbps | Only devices after 2009 | For max speed |
| 802.11 AC/N Mixed | up to 1 Gbps+ | Modern smartphones/PCs | For the 5 GHz range |
| 802.11 G Only | 54 Mbps | Devices from 2003-2009 | For special purposes only |
It is also worth mentioning the regime AC/N Mixed, which is typical for dual-band routers. It operates in the 5 GHz band and provides the highest speed, but is compatible with both B and G standards. If your router only supports 2.4 GHz, you should choose between BGN and N-only.
Instructions: How to change the wireless network mode
The process for changing Wi-Fi mode settings is universal for most equipment manufacturers, although the menu item names may vary slightly. First, you need to access the router's web interface. Typically, this involves opening a browser and entering the device's IP address in the address bar. This is most often 192.168.0.1 or 192.168.1.1.
After entering your login and password (often admin/admin by default), find the section responsible for wireless settings. Depending on the firmware version, it may be called Wireless, Wi-Fi Network or Wireless modeThis is where the key parameter is located. Mode (Mode).
Select the desired option from the drop-down list. If you want to ensure maximum compatibility, leave it 802.11 b/g/n mixedIf you need maximum speed and you are sure that there are no old devices, choose 802.11n onlyAfter applying the settings, the router will reboot the wireless module, and all devices will need to reconnect.
βοΈ Checklist before changing your regime
β οΈ Attention: When switching Wi-Fi modes, all wireless devices will lose connection for a short time. If you change settings remotely (via Wi-Fi), you may lose access to the router until the module reboots.
Compatibility issues and speed impact
One of the most common problems when using BGN mode is so-called "air poisoning." This occurs when a standard B device, transmitting data, occupies the channel for a long time due to the low modulation rate. The router is forced to wait for the transmission to complete before sending the data to a high-speed standard N client. This phenomenon is especially noticeable in densely populated apartment buildings.
There are also channel width issues. The N standard supports a 40 MHz channel width, which doubles the throughput. However, standards B and G operate strictly at 20 MHz. In mixed mode, the router is often forced to switch to 20 MHz to avoid interference and ensure stability for all clients. As a result, you don't get the speed benefits advertised for the N standard.
It's also worth considering the influence of neighboring networks. The 2.4 GHz band is heavily congested. If you use BGN mode, your router must take into account not only its own settings but also those of your neighbors. Crossing of channels and interference can lead to constant connection breaks, especially if the neighboring router operates in B-only or G-only mode.
Why does the speed drop at night?
Neighbors often download torrents or update games at night. In BGN mode, your router actively scans the airwaves for older protocols, which in noisy environments leads to micro-interruptions and a decrease in actual speed.
Optimization: Should You Split Ranges?
Modern dual-band routers often offer a "Smart Connect" feature, or network aggregation, where devices automatically select either the 2.4 GHz or 5 GHz frequency. However, for BGN mode, which operates exclusively in 2.4 GHz, the best solution is often manual separation or complete disabling of legacy protocols.
If possible, it's recommended to create a separate guest network for older devices or smart home devices that only run on B/G and isolate them from the main network where your laptops and smartphones operate. This will allow the main network to operate in N-only or AC-only mode, ensuring maximum speed without affecting slower devices.
In conclusion, the regime BGN β is a compromise solution that ensures versatility. It's necessary if your home has equipment more than 10-12 years old. However, for modern internet usage, 4K video, and online gaming, this mode is a bottleneck that should be eliminated by upgrading your equipment or properly segmenting your network.
Does BGN mode affect network security?
The operating mode (B/G/N) itself doesn't directly affect the encryption type (WPA2/WPA3). However, older standard B devices often don't support modern encryption methods and may require older, less secure protocols (such as WEP or WPA-TKIP) to be enabled, leaving the entire network vulnerable.
Why doesn't the phone see the network after changing the mode to N-only?
Most likely, your phone or tablet was released before 2009 and only supports 802.11b or 802.11g. In N-only mode, the router stops broadcasting signals for these standards, making the network invisible to older equipment.
Is it possible to speed up Wi-Fi just by changing the mode?
Yes, if you were previously using B/G Mixed mode, switching to BGN or N-only may result in a speed boost. However, if you're already using BGN, further acceleration is only possible by switching to N-only (if you don't have older devices) or switching to the 5 GHz band.