Guide

Crossband repeating: An important function

A look at the AVM product comparison shows that current FRITZ!WLAN repeaters such as 1750E or 1160 support a function called "crossband repeating". What exactly is that and why is the function for rapid data exchange in a home network important?

A step backwards: same band repeating

Repeaters receive the wireless signal from the FRITZ!Box and re-transmit it, thereby extending the reception range. In technical jargon this process is called "repeating". FRITZ!Box and client (e.g., smartphone, tablet, notebook) exchange data, with the repeater serving as the central exchange.

Older devices used the 2.4 GHz band exclusively, but since the introduction of Wireless AC, the 5 GHz band has also been available. These bands involve a frequency range in which router, repeater and client communicate. If FRITZ!Box and repeater support only the 2.4 GHz band, for example, repeating takes place only on that band. This is referred to as "same band repeating".

Crossband repeating

Crossband repeating works in a different way. When router and repeater support both bands, they are always connected to each other on the two bands. Parallel exchange accelerates the transmission. The individual clients are connected to the repeater either via the 2.4 GHz or 5 GHz band, but benefit from crossband communication to the FRITZ!Box.

No loss of speed

In same band repeating the data packets are first received by the repeater and then re-transmitted. Speed is halved in favor of increased range. In crossband repeating when the data switches from one band to the other during transmission, there is no loss of speed. That's possible because transmission and reception can run parallel during the switch. With same band repeating, data transmission and reception occur one after the other. Therefore, crossband repeating trumps same band for fast communication in the home network.

Intelligent band selection

With its current repeaters AVM goes one step further by equipping these devices with "intelligent crossband repeating", which independently selects the most suitable band for transmission. In practice it looks like this: The repeater selects a band for each registered client and re-transmits the data accordingly. When Wireless AC is used, the repeater re-transmits data from a 5-GHz client to the Box via that band (same band), while a 2.4-GHz client changes the band and continues along the 5 GHz track (crossband).

Of course that works in the other direction too. If the router can transmit only on the 2.4 GHz band, the communication to the repeater takes place there. From that point the data switches to the 5 GHz band in order to reach the intended clients.

Further articles for this topic
Wi-Fi 6 (Wireless AX) - what's different about the new wireless standard
2020 will be the year of Wi-Fi 6, offering faster speeds and better performance. The somewhat confusing names – IEEE 802.11ac, for example, or Wireless AC for short – are also changing. With the switch to Wireless AX, version numbers have been introduced: which means, Wi-Fi 6 is coming!
Everything about WiFi
Wireless LAN: Everyone wants it, AVM provides it – but what is it all about? This guide will let you know.
Surf at home over wireless LAN
Use the wireless LAN function at home to save the valuable data volume on your flat rate. You can also benefit from faster speeds and a secure connection.
AVM explains Mesh WiFi steering
When several FRITZ! products are being used in the home network at the same time, smartphones, tablets and other wireless devices are automatically steered to the wireless access point with the best wireless reception and also to the most suitable frequency band. This process is called Mesh WiFi steering.
WLAN AC
High-speed Wireless AC
Take advantage of fast wireless LAN with the AC standard. Dramatically increase speed while boosting the range of your wireless network.
Antennas have got you covered
Antennas bear a lot of responsibility. In the FRITZ!Box, for example, they support the wireless exchange of data within the home network and are able to connect multiple devices to the Internet concurrently. But are the number and visibility of WiFi antennas important when it comes to range?
Expanding the home network quickly and easily
Use the FRITZ!WLAN Repeater and FRITZ!Powerline to enjoy even more possibilities in the home network. With the repeater you increase the wireless LAN range, and with the powerline adapters you transmit data over the power lines.
How to get the best WiFi performance
The FRITZ!Box is already configured to transmit your data via wireless LAN at high speeds. But how can you get the best WiFi out of your Box? Read on for some simple tips and tricks on getting your reception up to speed.
Convenient switching for your wireless network
If you're traveling or are away from home for a longer period of time during the day, you probably won't need your home network. Find out how to turn off your WiFi, reducing power consumption and preventing unwanted access to your FRITZ!Box.
The FRITZ! Hotspot for your guests
Offer your guests simple, secure Internet access. The FRITZ! Hotspot is easy to set up and extremely convenient. Your visitors use their own wireless network so that your home network is protected.