I would imagine that with a 7 dbm SNR, you are having other problems as well.
What is a LOT of re-trans? I've got some VERY good links, +35dbm SNR with
30,000+ retrans and only 900,000 transmits. That worries me.
-----Original Message-----
From: Dan Metcalf [mailto:dan.metcalf@wbsysnet.com]
Sent: Sunday, December 15, 2002 5:25 PM
To: karlnet@WISPNotes.com
Subject: RE: [Karlnet] Strange retransmit problem
Kevin,
On the link we see a huge # of re-trans, the Signal is about -75dBm and
noise varys from -82dBm to -90dBm
Dan Metcalf
Wireless Broadband Systems
http://www.wbsysnet.com/
877-685-0578
dan.metcalf@wbsysnet.com
> -----Original Message-----
> From: karlnet-admin@WISPNotes.com [mailto:karlnet-admin@WISPNotes.com]
On
> Behalf Of Kevin Knuth
> Sent: Sunday, December 15, 2002 4:54 PM
> To: karlnet@WISPNotes.com
> Subject: RE: [Karlnet] Strange retransmit problem
>
> Chris,
>
> I agree with your point about not needing to fix a constant situation.
>
> I would be much more interested in Signal level in dBm as opposed to
> signal
> to noise ratio. And since the interference seems to be intermittent I
am
> wondering why you are having problems. Have you noticed (I am too
lazy on
> a
> Sunday to go back and read this whole thread!) any issues on the
ETHERNET
> side of the unit? AND, this particular client, any idea what kind of
data
> he is trying to move when the problems occur? And do you use
throttling?
>
> Just curious.....I will have to have tech support work with you to
really
> try to find a solution.
>
> Kevin
>
>
>
> -----Original Message-----
> From: karlnet-admin@WISPNotes.com
[mailto:karlnet-admin@WISPNotes.com]On
> Behalf Of Chris Conn
> Sent: Sunday, December 15, 2002 4:12 PM
> To: karlnet@WISPNotes.com
> Subject: RE: [Karlnet] Strange retransmit problem
>
>
> On Sun, 15 Dec 2002, Kevin Knuth wrote:
>
> > The TurboCell algorithm is pretty complex, so I am not sure of the
> "delay
> or
> > timeout" before it moves on.
> >
> > However, you must realize the forcing TurboCell to "not wait" has an
> effect
> > too! I just wonder if the benefit outweighs the other possible
effects
> on
> > performance. A question that WISPs have to ask themselves is how
many
> links
> > do they have that have less then great signal? Most WISPs run with
very
> > marginal links. If we tell TurboCell to ignore those, they may as
well
> close
> > up shop!
>
> Hello,
>
> As I said, this problem only occurs for a few minutes, where a single
> satellite is hogging all resources. No other satellites get polled.
I
> don't believe that this "fix" would necessarily have to take into
account
> a constant situation but rather a particular case where the satellite
is
> obviously not sending something back to the base and it gets stuck. I
> don't see how it can be considered normal that a satellite can cause
an
> entire multipoint setup to become unuseable for a number of minutes.
>
> As for marginal, during one of these "problems", I had 20db+ SNR on
either
> the base or the satellite, therefore I doubt it is a noise issue. And
the
> satellites in question have less than 2% retransmits at any given time
> other than these particular incidents where we have several thousand %
of
> retransmit.
>
> Chris
>
>
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