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Author Topic: WiFi speed issues  (Read 2724 times)

N0STIE

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WiFi speed issues
« on: April 19, 2020, 04:52:28 PM »

Hi,

Recently tested various routers to find the most stable, with great WiFi coverage and that will give me lowest latency possible.

Tested: Netgear d7000 v2, d7800, TP-LINK VR600 v2, currently using VR2800 which is the best of the above.

My issue relates to strange WiFi download speed as all of the above routers give me maximum download speed of 59mbps on every speed test website out there. I can't get more than 59mbps (apparently it always shows 58-59mbps and never less never more) despite my sync being 80/20 and wired speed tests show 75/19. Upload seems fine. No matter if I am on 2.4 or 5ghz, very close or far away from the router it still is 59mbps. Of course I've tried changing channels, channel width and nothing seem to help. Tested on few wireless devices and all report the same. Very strange to me and seriously couldn't find anything about it on the internet. I'd understand it if my signal was bad, but it shows 850mbps on my phone and full bars (-32dB)

Anyone know what could be causing my download speed not being 74mbps over WiFi? I'd be very grateful for any help.
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Weaver

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Re: WiFi speed issues
« Reply #1 on: April 19, 2020, 05:33:17 PM »

[Itís a long time since I studied all this so please forgive me if my memory has failed me.]

What sort of wireless NIC / device are you using on the other machine that you are using in testing?

It could be lack of MIMO multiple paths / diversity. If there are opportunities for reflection to create an indirect longer path or two as an alternative to the straight line transmission route, then that will double etc your total transfer rate with MIMO hardware. If the straight line route is the only route, then it may be slow.

If one of the devices doesnít do MIMO, then your rate can be limited to ~65Mbps instead of nearly 300Mbps or 600Mbps or whatever, depending on how many antennae you have at each end.
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N0STIE

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Re: WiFi speed issues
« Reply #2 on: April 19, 2020, 06:16:18 PM »

I've tested it on 2x Huawei P20 Pro and Samsung laptop with Intel NIC. Samsung definitely doesn't support MU MIMO as it is very old laptop and not sure about P20 Pro. Any way to disable this feature?
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Alex Atkin UK

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Re: WiFi speed issues
« Reply #3 on: April 19, 2020, 10:42:41 PM »

I've tested it on 2x Huawei P20 Pro and Samsung laptop with Intel NIC. Samsung definitely doesn't support MU MIMO as it is very old laptop and not sure about P20 Pro. Any way to disable this feature?

Its not about MU-MIMO, but MIMO in general, but that would already be reflected in the link speed shown.  If your phone is showing around 866Mbit, that would suggest 2x2 MIMO, I can easily pull 700Mbit (tested to LAN, don't have broadband that fast) at that on my S10 (although for some weird reason Windows does less at the same link rate, more like 500-600) so this is really weird.

What I tend to do is run iperf3 as a server on a wired device then run iperf3 client in reverse mode "iperf3 -Rc <serverip>" to test the WiFi performance of the client.  Magic iPerf is good on Android.
« Last Edit: April 19, 2020, 10:48:55 PM by Alex Atkin UK »
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meritez

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Re: WiFi speed issues
« Reply #4 on: April 20, 2020, 09:18:11 AM »

I've tested it on 2x Huawei P20 Pro and Samsung laptop with Intel NIC. Samsung definitely doesn't support MU MIMO as it is very old laptop and not sure about P20 Pro. Any way to disable this feature?

How many neighboring wireless networks can you see?
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N0STIE

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Re: WiFi speed issues
« Reply #5 on: April 20, 2020, 11:33:55 AM »

How many neighboring wireless networks can you see?

There are 2-3 neighbouring routers using the same channels but changing 5G channel to another doesn't make a difference. I feel like it would easily hit 75mb on Speedtests but something is preventing it to reach the max speed at it locks up on 59mb.
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mrk26

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Re: WiFi speed issues
« Reply #6 on: April 20, 2020, 12:30:13 PM »

How many devices you have connected at the same time. Do you have QoS setup?
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N0STIE

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Re: WiFi speed issues
« Reply #7 on: April 20, 2020, 01:07:21 PM »

How many devices you have connected at the same time. Do you have QoS setup?

Tested with none and few devices connected - no difference. Same to QoS enabled or disabled no difference
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psychopomp1

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Re: WiFi speed issues
« Reply #8 on: April 22, 2020, 04:27:22 PM »

Can't you even get around 70 Meg when standing next to the router with your smartphone? Can you run speedtests using the speedtest.net & fast.com apps on your smartphone?
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N0STIE

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Re: WiFi speed issues
« Reply #9 on: April 22, 2020, 05:59:30 PM »

Can't you even get around 70 Meg when standing next to the router with your smartphone? Can you run speedtests using the speedtest.net & fast.com apps on your smartphone?

No, not even being 5cm from the router. 59-60mb constantly
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N0STIE

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Re: WiFi speed issues
« Reply #10 on: April 23, 2020, 12:57:41 AM »

Always speeds like that.

Attached
« Last Edit: April 23, 2020, 01:00:10 AM by N0STIE »
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j0hn

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Re: WiFi speed issues
« Reply #11 on: April 23, 2020, 02:03:24 AM »

I've used 2 out of the 4 routers mentioned in the 1st post and they both achieved considerably more than 60Mb/s on 5GHz AC.

You could try forcing 802.11ac and see if that helps.

Open the VR2800 web interface then go to..

Advanced > wireless settings > 5GHz
Set mode to 802.11ac only
Channel width 80
Leave channel on auto, or..
use an app like "WiFi Analyser" to find a quiet 5GHz channel (I would be doing this anyway).
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N0STIE

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Re: WiFi speed issues
« Reply #12 on: April 25, 2020, 11:17:45 PM »

I've used 2 out of the 4 routers mentioned in the 1st post and they both achieved considerably more than 60Mb/s on 5GHz AC.

You could try forcing 802.11ac and see if that helps.

Open the VR2800 web interface then go to..

Advanced > wireless settings > 5GHz
Set mode to 802.11ac only
Channel width 80
Leave channel on auto, or..
use an app like "WiFi Analyser" to find a quiet 5GHz channel (I would be doing this anyway).

Thanks for suggestions j0hn, unfortunately none of these helped. It actually is even worse.
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Alex Atkin UK

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Re: WiFi speed issues
« Reply #13 on: April 26, 2020, 12:10:46 AM »

Thanks for suggestions j0hn, unfortunately none of these helped. It actually is even worse.

Have you tried taking your lead gloves off when holding the phone?  ::)

Seriously though, this is bizarre.
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sevenlayermuddle

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Re: WiFi speed issues
« Reply #14 on: April 26, 2020, 01:06:51 AM »

Personally Iíd be taking the view that wired speed tests of 75Mbps, vs WiFi of 60Mbps, are ďabout the sameĒ.  In other words, covering both scenarios, we have a speed of mid 60s plus/minus 10%.

Wireless can never be as good as wired, the best it can do is to be very nearly as good, and then only under ideal conditions.     And speed test sites are not an exact science. :)
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