Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 .11-OCB does use beacons

That is right, but it has to be presented completely. The simple drawing 
suggests that Beacons are necessary for ordinary operation.

For sure MAC management frames are supported for specific purposes.

Hans-Joachim

Am 01.02.2017 um 13:03 schrieb Jérôme Härri:
>
> Dear all,
>
> I do not agree and I would be happy to have the reference in the IEEE 
> 802.11-2016 stating otherwise.
>
> In the 802.11 standard, it clearly state the following line:
>
> When dot11OCBActivated is true in a STA:
>
> " The STA _may send management frames of subtype Action_ and, if the 
> STA maintains a TSF Timer, subtype Timing Advertisement "
>
> " The STA may send _control frames_, _except_ those of _subtype 
> PS-Poll, CF-End, and CF-End + CFAck_ "
>
> " The STA may send _data frames of subtype Data, Null, QoS Data, and 
> QoS Null_. "
>
> A beacon is a management frame, but not of a class Action, so it 
> _cannot be transmitted when dot11OCBActivated_ is true in a STA. But I 
> agree that it is ambiguous…nevertheless, I would then replace in the 
> draft the mention of what OCB can do or can’t do (e.g. sending 
> beacons) with the exact 802.11-2016 statements. This would avoid 
> misunderstanding.
>
> But even if it could be possible, this does not make much sense. A 
> beacon is transmitted on a channel you need to connect to get BSS 
> information and also to get the right frequency. In case of OCB 
> (outside context of a BSS), it is not required. But the real question 
> is ‘why’ would we need beacon, assuming it could be transmitted?
>
> Best Regards,
>
> Jérôme
>
> -----Original Message-----
> From: its [mailto:its-bounces@ietf.org] On Behalf Of Alexandre Petrescu
> Sent: Wednesday 01 February 2017 11:51
> To: its@ietf.org
> Subject: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 .11-OCB does 
> use beacons
>
> draft-ietf-ipwave-ipv6-over-80211ocb-00 .11-OCB does use beacons
>
> Hello IPWAVErs,
>
> It was suggested in private that, contrary to what the draft says, the 
> .11-OCB does use beacons.
>
> As such, the following line should disappear from the draft:
>
> > 4.  Aspects introduced by the OCB mode to 802.11
>
> >
>
> >    In the IEEE 802.11 OCB mode, all nodes in the wireless range can
>
> >    directly communicate with each other without authentication/
>
> >    association procedures. Briefly, the IEEE 802.11 OCB mode has the
>
> >    following properties:
>
> >
>
> >    o  Wildcard BSSID (i.e., all bits are set to 1) used by each node
>
> >
>
> >    o  [strike through] No beacons transmitted
>
> Yours,
>
> Alex
>
>
>
> _______________________________________________
> its mailing list
> its@ietf.org
> https://www.ietf.org/mailman/listinfo/its

-- 
Dr. Hans-Joachim Fischer
Managing Director

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