Re: wifi bit rate

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On 05/21/2012 03:31 PM, Rick Stevens wrote:
On 05/21/2012 02:52 PM, Konstantin Svist wrote:
On 05/21/2012 02:33 PM, JD wrote:
On 05/21/2012 01:34 PM, Konstantin Svist wrote:
On 05/21/2012 01:18 PM, JD wrote:
Any wifi protocol savvy people who can explain this:

iwconfig wlan0
wlan0 IEEE 802.11bgn ESSID:"Private"
Mode:Managed Frequency:2.452 GHz Access Point: 00:AA:BB:CC:DD:EE
Bit Rate=18 Mb/s Tx-Power=27 dBm
Retry long limit:7 RTS thr=2346 B Fragment thr=2346 B
Power Management:off
Link Quality=70/70 Signal level=-36 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:25 Missed beacon:0

The access point is a 54G wifi gateway and router.

My wifi card is the Atheros AR5008 which is an 802.11n card.

How could the bit rate be restricted to 18Mb/s??
Is this a problem with the ath9k driver or the wext driver?
PS: I did not have the issue until installing FC16. This
problem was absent in FC14.


I thought wifi adjusts the data rate on the fly based on how strong
the signal is. Try moving the laptop closer to the router, at least
just to see if the rate goes up...

No difference!!
Stuck at 18mb/s

By the way: I changed wifi interface on my machine to an rtl8187
and still iwconfig reports 18mb/s, with full signal quality at 70/70 !!!

# iwconfig wlan1
wlan1 IEEE 802.11bg ESSID:"Private"
Mode:Managed Frequency:2.452 GHz Access Point: 00:AA:BB:CC:DD:EE
Bit Rate=18 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr=2346 B Fragment thr=2346 B
Power Management:off
Link Quality=70/70 Signal level=-25 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:21 Missed beacon:0



Hm, you're right - the quality is out of 70 and the rate is really low..
here's mine:
wlan0 IEEE 802.11abgn ESSID:"Redacted"
Mode:Managed Frequency:2.412 GHz Access Point: 00:14:D1:C4:4C:3F
Bit Rate=1 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=62/70 Signal level=-48 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:1 Invalid misc:20 Missed beacon:0

Maybe it's because I'm also connected over ethernet, so wifi is not
being used, so it's in powersaving mode of some kind..?
See if your rate goes up/down if you're actively transferring a bunch of
data.

My laptop is using a wired connection currentl, but the wireless
shows...

wlan0     IEEE 802.11bgn  ESSID:"myessid"
Mode:Managed Frequency:2.462 GHz Access Point: 98:FC:11:4A:89:56
          Bit Rate=72.2 Mb/s   Tx-Power=15 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=63/70  Signal level=-47 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:65   Missed beacon:0

My guess is it's the signal strength. Note mine is at -47dBm, the OP's
was at -36dBm.




I think that perhaps iwconfig might be broken,
or one or both of the drivers ( ath9k and or wext)
may be providing wrong info to whatever syscall iwconfig
is using to obtain the info.
When I take my laptop to starbucks or McDonalds hot spot,
even when sitting outside, bitrate never is below 54mbps,
sometime is as high as 72mb/s


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