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Poor Wifi performance

Posted: Wed Aug 10, 2011 12:07 am
by Franpa
Hi, I'm having trouble with receiving WiFi in my house. More often then not download speeds will operate at around 2x dialup speed while wired connections work at 420KB/s. My Nintendo Wii is struggling to stream 360/480 Youtube quality videos without constantly performing buffering, it eventually drops the connection all together and says the connection was lost. We used a laptop to determine that download speeds are about 2x dialup for wireless connections (Speedtest.net, various other sites). The Wii is located behind a wall in another room while the laptop tests were performed in the same room as the router.

Inssider indicates a strong RSSI throughout our house as well and I've switched to a channel hardly anyone else is using.



I'm not sure how to resolve this problem, my dad is probably going to open the router and make sure the Antennae is connected, the router is 2 years old so there's no warranty left on it. Any idea's that don't involve the purchase of a WiFi Repeater or an alternate router to ours? (Netcomm NB6+4W Revision 1)


Things we've tried to resolve this:

1) Switching what Channel our WiFi uses. We've tried this numerous times with no effect.

2) Changing the transmission and multicast rates to 54Mbps. (From Auto)

3) Enable the Turbo mode.

4) Enable User Isolation.

5) Rotate/change the angle of the router antennae.

6) Ensure the WiFi card on the laptop is not operating in an energy efficient/power saving mode and that it operates at maximum full duplex speed.

7) Reset router to default configuration (After backing up the current configuration)

8) As per the first item on there FAQ I've also tried changing from WEP to WPA2-PSK with no change.

Re: Poor Wifi performance

Posted: Wed Aug 10, 2011 12:42 pm
by jokiin
Franpa wrote:
8) As per the first item on there FAQ I've also tried changing from WEP to WPA2-PSK with no change.
have you tried disabling security altogether (as a test) and see if any difference?

Re: Poor Wifi performance

Posted: Thu Aug 11, 2011 1:18 am
by Franpa
Yup just did. I turned off security and the Access Controls feature and tested it. It was very marginally better but I'm inclined to think that the time of day is causing that.

Re: Poor Wifi performance

Posted: Thu Aug 11, 2011 9:44 am
by jokiin
Franpa wrote:Yup just did. I turned off security and the Access Controls feature and tested it. It was very marginally better but I'm inclined to think that the time of day is causing that.
ok, turning off security and no appreciable difference indicates that it's not a compatibility/settings issue or similar, have you tried changing channels, it may well be interference from another device, possibly one of the neighbors even, there are a lot of devices that use that same 2.4G spectrum, cordless phones, other Wi-Fi, Microwave ovens etc that can play havoc with your speed due to interference

Re: Poor Wifi performance

Posted: Fri Aug 12, 2011 1:05 pm
by Franpa
I've tried a couple like 11, 6, 1 and 2. Inssider reports most nearby access points use channels other then Channel 1 and 2. I don't know of any program that can specifically scan for and detect interference though other then a product advertised by the people that make Inssider but that product doesn't appear to be free.

Re: Poor Wifi performance

Posted: Fri Aug 12, 2011 1:52 pm
by Dazzled
You will need a spectrum analyser to do a thorough job - sorry, $$$. 2.4 GHz is everywhere, not only your and your neighbours' wireless routers, but phones and other domestic radio controlled devices as well. There is normally channel overlap, 1 to 13 are usually available on Australian gear, and only three won't overlap.

Besides inSSIDer with its nice GUI, you could look up some non-Windows freebies - iwlist scan, and kismet come to mind. There is a range of scanners, sniffers, crackers and goodness knows what else already set up ready to go in this free Linux live DVD: http://www.backtrack-linux.org/. Some apps are GUI driven, but most run from a CLI terminal. Worth a look even if only to see what other people can do to you.