Forum Thread

How to fix bad 2.4GHz WIFI performance

d0d0 924 286 February 29, 2016 at 03:43 PM
One of my friend just moved and has very bad 2.5GHz wifi performance. The speeds that they get are pretty bad, wifi router is like 15 feet away and they get 1-2 MBPS download speed. Wired and on 5GHz they get like 30MBPS. 30MBPS is their official package speed.

We changed routers to rule out defective router.

They are in a densely populated Jersey City area and I see lots of wifi around.

Any thoughts on how to fix it?

inssider is now paid, so would appreciate any free tools recommendation too. I have Win 10 laptop.

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#2
Wifi analyzer on Android works great.

It seems like you really have no choice. The 2ghz band is too crowded.
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#3
5GHz is basically designed for Jersey City (and any other densely populated place). There are more bands available to decrease contention, and the reduced wall penetration compared to 2.4GHz means that fewer of your neighbor's signals make it into your apartment to begin with.

Wi-Fi Analyzer is great, and you should check it out, but mostly you should just give up on 2.4GHz.
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Last edited by quotidian February 29, 2016 at 04:51 PM
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#4
Thanks guys.

1) How does WiFi Analyzer compare to inssider on Android? I have some coins on Amazon which I can use to buy inssider.

2) Is there a cheap 5ghz usb wifi adapter? Their older laptop is only 2.4g antenna

3) Will it make sense to gt a router like Asus N66 series?
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#5
Quote from d0d0 View Post :
Thanks guys.

1) How does WiFi Analyzer compare to inssider on Android? I have some coins on Amazon which I can use to buy inssider.

2) Is there a cheap 5ghz usb wifi adapter? Their older laptop is only 2.4g antenna

3) Will it make sense to gt a router like Asus N66 series?
1) I'm not sure, but Wi-Fi Analyzer is free (ads). You really just need something that will graph out Wi-Fi networks, their strengths, and their bands to give you an idea what's free. Never used inssider, but I'm sure it's fine too.

2) Yeah, there's always that one holdout Smilie I don't have a good recommendation. I solved this problem by moving out of the city, but buying a wifi adapter is probably cheaper Smilie

3) People have varying opinions of Asus on this board. If you can get it cheap, it will do the job, but I'm not sure it would be my first recommendation. What's your price range?
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#6
Quote from d0d0 View Post :
One of my friend just moved and has very bad 2.5GHz wifi performance. The speeds that they get are pretty bad, wifi router is like 15 feet away and they get 1-2 MBPS download speed. Wired and on 5GHz they get like 30MBPS. 30MBPS is their official package speed.

We changed routers to rule out defective router.

They are in a densely populated Jersey City area and I see lots of wifi around.

Any thoughts on how to fix it?

inssider is now paid, so would appreciate any free tools recommendation too. I have Win 10 laptop.
Inssider Home [techspot.com] is still available for free.

Look at vistumbler [vistumbler.net] it's one of my favorites. Also free.

Here you can find 5 Free [techrepublic.com] wireless network analyzers.

You may find a solution in my discussion regarding Wireless Networking
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#7
if 1, 6, 11 channel didn't help. forget about choosing a channel, auto channel is too good, you change, they change.

how old is the laptop? maybe it can upgrade to dual band.

move router away from where received the most other signals.

shield some of the directions. if router placed in the middle, move to a wall, so you can shield signals from the wall with any hard metal or metal sheets, external antennas are easier to shield, because you know where the signals come from. you can try to use a useless installation disc, place it about one inch away from each antenna. signals usually don't come from the tip, try half inch lower.

try lower the transmit power, low to a point where it won't affect the speed, because interference goes both ways, try to use enough power but not affecting others.

try use a more helpful SSID instead of something like "Slickdeals_WiFi", try "slow?_ShieldExtraDirections", or "Interference?Try5Ghz"
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#8
As we have discussed many times over in tech support, site survey, check for interference, change channels do not use anything other than 1, 6 or 11, make sure antennas are oriented perpendicularly to the direction of transmission, make sure wifi router is centrally located.

If you have 2.4Ghz congestion unfortunately you are screwed unless you move over to 5Ghz.
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#9
Thanks Guys. I swapped their TRENDnet TEW-811DRU AC1200 with Tplink WDR4300 router, used inssider to identify the surrounding networks. Super congested on 2.4 G, ZERO traffic on 5GHz.

Router was not the issue. On default setting I was getting ~1MBps on both router on 2.4G and 30MBps on 5G. They have 30MBps internet connections.

Fix:
Made 2.4G as n only (removed b and g), moved from auto channel to ch1. Made the Bandwidth to 20MHz (instead of 40GHz/Auto). These 3 fixes improved the speed on 2.4G to between 6-10Mbps. TTramsmit power unaltered.

Since only 1 laptop uses 2.4G, they are happy with the fix.

Thanks for all the inputs.
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#10
how long has been fixed? doesn't sound like a permanent fix.
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#11
Quote from Left4Deal View Post :
how long has been fixed? doesn't sound like a permanent fix.
No such thing as a permanent fix in a congested 2.4Ghz area. But it looks like he did all the right things that really should be done automatically by the manufacturer.
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#12
Quote from brbubba View Post :
No such thing as a permanent fix in a congested 2.4Ghz area. But it looks like he did all the right things that really should be done automatically by the manufacturer.
Agreed but if the manufacturer did everything they should the OS on their hardware would be huge, that and if they did what would tech support be like? Oh yea for professions it would be bliss. laugh out loud
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#13
Quote from Left4Deal View Post :
how long has been fixed? doesn't sound like a permanent fix.

some where I read that in a congested zone try using G instead of N to boost throughput speed. Overall connection speed may drop but the throughput will rise. Next time I am there, I will try and update on the results and the performance.
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#14
Alternatively, you could try to convince your friend to paper their walls with aluminum foil Smilie

Seriously though, putting the router in the corner and shielding the far side (as Left4Deal mentions up thread) might not be entirely crazy. Unfortunately you've probably got interference coming from every direction, so I'm not sure blocking 1 or 2 directions will make up for not having the router centrally located, but it could.
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Last edited by quotidian March 7, 2016 at 10:00 PM
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#15
i made this shit for a friend, only blocks one direction from the street, received about 100 SSID, killed half of the weak SSID. (refused to upgrade that shitty single antenna router, but have money to upgrade iPhone, buy lots of nail polish, etc. i don't know why)
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