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Wireless connection speed decreases strangely

Author
25 Sep 2007 4:50 PM
drago98
My wireless connection decreases from 56mbps to 1.0mbps for no reason after
half-hour. I'm using linksys router and tried power cycling the router but to
no avail. The only way I can do is to repair the connection and it returns to
maximum speed.

Author
27 Sep 2007 5:02 AM
Chuck [MVP]
On Tue, 25 Sep 2007 09:50:01 -0700, drago98 <drag***@discussions.microsoft.com>
wrote:

>My wireless connection decreases from 56mbps to 1.0mbps for no reason after
>half-hour. I'm using linksys router and tried power cycling the router but to
>no avail. The only way I can do is to repair the connection and it returns to
>maximum speed.

Have you tried testing actual throughput periodically, as in when you first
start out (max connection speed), then again when you are at min connection
speed.  If you have noise (analog interference) or neighbours (digital
interference), you'll not be getting max throughput, regardless of connection
speed.

Some WiFi drivers may start your connection out at maximum expected speed, and
gradually decrease, looking for a stable connection.  Depending upon the
interference that you may be getting, this could give you a steadily decreasing
connection rate.  Do a WiFi environment analysis, and watch your metrics and
your neighbours.
<http://nitecruzr.blogspot.com/2006/06/analyse-your-wifi-environment.html>
http://nitecruzr.blogspot.com/2006/06/analyse-your-wifi-environment.html

--
Cheers,
Chuck, MS-MVP 2005-2007 [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My        email         is          AT         DOT
   actual       address    pchuck       mvps        org.
Author
3 Oct 2007 10:03 AM
drago98
However, my other laptop using the same wireless router is running at full
speed. So there isn't any interference. Both laptops are using the same
settings.

Show quoteHide quote
"Chuck [MVP]" wrote:

> On Tue, 25 Sep 2007 09:50:01 -0700, drago98 <drag***@discussions.microsoft.com>
> wrote:
>
> >My wireless connection decreases from 56mbps to 1.0mbps for no reason after
> >half-hour. I'm using linksys router and tried power cycling the router but to
> >no avail. The only way I can do is to repair the connection and it returns to
> >maximum speed.
>
> Have you tried testing actual throughput periodically, as in when you first
> start out (max connection speed), then again when you are at min connection
> speed.  If you have noise (analog interference) or neighbours (digital
> interference), you'll not be getting max throughput, regardless of connection
> speed.
>
> Some WiFi drivers may start your connection out at maximum expected speed, and
> gradually decrease, looking for a stable connection.  Depending upon the
> interference that you may be getting, this could give you a steadily decreasing
> connection rate.  Do a WiFi environment analysis, and watch your metrics and
> your neighbours.
> <http://nitecruzr.blogspot.com/2006/06/analyse-your-wifi-environment.html>
> http://nitecruzr.blogspot.com/2006/06/analyse-your-wifi-environment.html
>
> --
> Cheers,
> Chuck, MS-MVP 2005-2007 [Windows - Networking]
> http://nitecruzr.blogspot.com/
> Paranoia is not a problem, when it's a normal response from experience.
> My        email         is          AT         DOT
>    actual       address    pchuck       mvps        org.
>
Author
3 Oct 2007 2:11 PM
Chuck [MVP]
On Wed, 3 Oct 2007 03:03:03 -0700, drago98 <drag***@discussions.microsoft.com>
wrote:

Show quoteHide quote
>"Chuck [MVP]" wrote:
>
>> On Tue, 25 Sep 2007 09:50:01 -0700, drago98 <drag***@discussions.microsoft.com>
>> wrote:
>>
>> >My wireless connection decreases from 56mbps to 1.0mbps for no reason after
>> >half-hour. I'm using linksys router and tried power cycling the router but to
>> >no avail. The only way I can do is to repair the connection and it returns to
>> >maximum speed.
>>
>> Have you tried testing actual throughput periodically, as in when you first
>> start out (max connection speed), then again when you are at min connection
>> speed.  If you have noise (analog interference) or neighbours (digital
>> interference), you'll not be getting max throughput, regardless of connection
>> speed.
>>
>> Some WiFi drivers may start your connection out at maximum expected speed, and
>> gradually decrease, looking for a stable connection.  Depending upon the
>> interference that you may be getting, this could give you a steadily decreasing
>> connection rate.  Do a WiFi environment analysis, and watch your metrics and
>> your neighbours.
>> <http://nitecruzr.blogspot.com/2006/06/analyse-your-wifi-environment.html>
>> http://nitecruzr.blogspot.com/2006/06/analyse-your-wifi-environment.html

>However, my other laptop using the same wireless router is running at full
>speed. So there isn't any interference. Both laptops are using the same
>settings.

Interesting and useful details.  What other details have you not disclosed?
<http://nitecruzr.blogspot.com/2005/06/background-information-useful-in.html>
http://nitecruzr.blogspot.com/2005/06/background-information-useful-in.html

--
Cheers,
Chuck, MS-MVP 2005-2007 [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My        email         is          AT         DOT
   actual       address    pchuck       mvps        org.
Author
6 Oct 2007 2:50 PM
Pavel A.
"Chuck [MVP]" <n***@example.net> wrote in message news:3l87g355hcs5c6qrc76oeh22q5aec55qen@4ax.com...

> Interesting and useful details.  What other details have you not disclosed?

Models of wireless adapters on both machines.
Band and channel set on the router.

Regards,
--PA
Author
3 Oct 2007 12:03 PM
Barb Bowman
what operating system? what NIC and what driver?
which Linksys router model number and hardware rev and what firmware
version?

On Tue, 25 Sep 2007 09:50:01 -0700, drago98
<drag***@discussions.microsoft.com> wrote:

>My wireless connection decreases from 56mbps to 1.0mbps for no reason after
>half-hour. I'm using linksys router and tried power cycling the router but to
>no avail. The only way I can do is to repair the connection and it returns to
>maximum speed.
--

Barb Bowman
MS Windows-MVP
http://www.microsoft.com/windowsxp/expertzone/meetexperts/bowman.mspx
http://blogs.digitalmediaphile.com/barb/