WLAN from the attic to the basement?

We have in the attic our living room with router (Fritz box 6490 cable) and television connection (everything with Vodafone / KD).

Now we want to increase the range of our WLAN so that we can work in the basement on our laptops. At the moment there's zero reception in the basement (neither mobile, nor WLAN, very thick ceiling and walls).

For the distribution of the wlan in the DG and EG we use in total 5 repeaters FriTz 1750e. If I put one or more repeaters in the staircase or in the cellar, unfortunately, still nothing gets through.

Does anyone have an idea how we can still use Wi-Fi in the basement or are we not around a second port / router around.

Whereby I would like to mention at the point that we still have a FritzBox 7390 lying around and have also set up as a repeater. Unfortunately, nothing goes.

I'm very grateful for tips and help.

There are no 15 repeaters…

The blankets are simply in the way…

My suggestion would be simple on the spot, the existing telephone line, is not needed, as a rudimentary network to abuse the cellar.

with four wires, connected to the pins 1,2, 3 and 6 you can reach stable 100 MBit / s…

if you really need bandwidth below, then you could also drag the router into the cellar and use the track up. One of the repeaters of fritz can then hook up the network connected for wlan.

Alternatively: have a Devolo Din Rail AV 1200+ installed in the recess and then place appropriate DLAN connectors with WLAN function at all important points in the house. Where the router is, you need a LAN connection.

To improve Wi-Fi performance, technologies like MESH and MU-MIMO are important today.
You should check whether the 7390 masters these techniques - otherwise it could be more disturbing than good.

Furthermore, you should note that "the more repeaters work - the slower the WLAN." - Finally, every data transmission must be repeated one to several times repeatedly.

After the description, it sounds like that in your house, the radio signal is attenuated too much, until it reaches the basement.

That leads me to the following conclusion:
It would be best to use LAN cables. It brings the biggest performance.

Powerline you could also try, however, the transmission quality depends on the shielding of the power cable - which are usually poorly shielded or not at all.
If the WLAN transmission problems are not due to the fact that the signal is attenuated but disturbed, it could possibly also affect the performance of the Powerline connection.

It's hard to say without a test.

Since you use AVM products: Please make sure, if you should decide for Powerline that these devices are MESH-capable.

All in all, one can say that the concrete ceilings are the big hurdle for your WLAN.

Roughly speaking, only 10-15% comes after a concrete pavement.

In the best case you have in the attic with the ac standard ~ 600 MBit / s

after the first concrete pavement in the optimal case only ~ 80 MBit / s

after the 2nd concrete pavement in an optimal case only ~ 10 MBit / s

after the 3rd concrete pavement in the optimal case I would say nothing more.

This is the optimal case, unfortunately you can't reach it, so you have less.

Either you lay LAN cable (unused fireplace / laundry shaft? Over the outer wall a narrow cable channel? Optically behind the downpipe of the gutter hide?) To the basement.

If that does not work, then Powerline. With Powerline you should best catch the same power line, then they are really good. So it depends on the line network.

Tip: Sockets in the staircase? The staircase network is well suited, because they all depend on the same fuse and have lines that go directly on the shortest way in the basement!