[Battlemesh] Broadcast lost because of hidden station
Gui Iribarren
gui at altermundi.net
Thu May 8 20:01:57 CEST 2014
On 08/05/14 13:08, Ben West wrote:
> I'm curious if a recent changeset to OpenWRT trunk with Henning's name
> on it is relevant this to thread about unreliable multicasts:
> https://dev.openwrt.org/changeset/40696/trunk
to me it looks like this addresses a simple "cosmetic" annoyance, where
if there's no unicast traffic from a particular station, "iw station
dump" will report a RX bitrate equal to that station multicast bitrate
(normally low, say 6 mbit)
with this patch, i imagine the "rx bitrate" field will always reflect
the last unicast packet received from that station, not taking into
account multicasts seen afterwards.
>
> If so, has it yielded a noticeable improvement?
>
> On Tue, Apr 29, 2014 at 1:45 AM, Henning Rogge <hrogge at gmail.com
> <mailto:hrogge at gmail.com>> wrote:
>
> Hi,
>
> RTS/CTS is a good explanation... I remember seeing RTS packets, maybe
> the CTS wasn't visible in my trace because it was produced by the
> local station.
>
> Still its an annoying problem... routing agent drops route because of
> no multicasts but in theory unicast still works.
>
> Henning
>
> On Sat, Apr 26, 2014 at 2:56 PM, Paul Fuxjaeger <fuxjaeger at ftw.at
> <mailto:fuxjaeger at ftw.at>> wrote:
> > On 26.04.14 12:07, Henning Rogge wrote:
> >> but I would expect that at least "one in five" broadcasts would make
> >> it through, because unicasts get up to 4 retransmissions.
> >
> > retransmission are sent in "fast" succession, maybe that helps to get
> > them received easier or maybe RTS/CTS is enabled?
> >
> > But if you don't see those non-retried frames EVER (multicast FER=1
> > while unicast FER<<1 while using the same channel code) this
> sounds like
> > the problem is located somewhere "higher".
> >
> >
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>
> --
> Ben West
> http://gowasabi.net
> ben at gowasabi.net <mailto:ben at gowasabi.net>
> 314-246-9434
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>
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