| Gönderen: |
Christian Langanke <os2-wireless_users@2rosenthals.com> |
Tam Ba?l?klar
Çözülmemi? ?leti |
| Gönderen: |
os2-wireless_users-owner <os2-wireless_users-owner@2rosenthals.com> |
| Konu: |
[OS2Wireless] signal strength |
| Tarih: |
Fri, 06 Jan 2006 23:48:25 +0100 |
| Alacak: |
os2-wireless_users@2rosenthals.com |
|
|---|
Jeroen Besse wrote:
Hi,
I noticed that, with my Atheros card, the genmac100 driver and
xwlan212, the signal displayed is always between 60% (with change that
the signal is lost completely) and 90% (with the notebook 20cm away
from the access point).
Within Windows, the signal strength is reported with much more range;
I've seen working connections with a signal strength of around 20%.
Is this a bug in genmac100, in the Win driver used within that, or in xwlan?
Hi Jeroen,
the driver should report the signal strength within a certain value range, according to the NDIS interface specs, from -200 to -10. The genmac.dim converts that to a range of 0 to 190 and then to a range from 0 to 60, matching the DIM spec of XWLAN (taken from the genprism.dim),. This is calculated to a percentage where 60 matches 100%.
Since AFAIK the OID clal for the signal strength is returned by the driver directly. there cannot be a genmac error. My method of calculating may be wrong at some point, but I don't know where. If somebody knows a better scheme please tell me.
BTW, with the genprism driver and artem card, I also was able to use a 20% connection to get proper downloads etc.
Loosing the connection can also be a question of packet fragmentation, in rare cases either the driver on the client or the access point or both must be adjusted. I had such a problem that I could solve only by decreasing the fragmentation threshold on a former wlan router of mine to the default value of the WLAN router.
bye, Christian
-------------------------------------------------
Christian Langanke
COS2E & CWSE
Team OS/2 Ruhr e.V.
cla@clanganke.de
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