Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 figure comparing .11 to .11-OCB

Le 01/02/2017 à 21:03, Dick Roy a écrit :
>
> To reiterate, when using an 802.11 MAC & PHY in OCB mode, there is NO
>
> 1)Synchronization,
>

What do you mean by No Synchronisation?

BEcause a packet dump from a commercial RSU features a "IEEE 802.11 
Acknowledgement"?  Is this forbidden?

Alex

> 2)Authentication, or
>
> 3)Association
>
> performed at the MAC sublayer or lower.  There are NO beacons or 
> probes allowed in OCB mode.  That said, any chart showing the 
> difference between OCB and non-OCB mode must be independent of any 
> higher layer service being executed using either (lower layer) mode 
> and as such, addition of such irrelevant information would only be 
> confusing.  OCB mode is very simple:
>
> STA1 STA2
>
>    |←---- data --→|
>
> where data can be data, action, or mgmt frames from a restricted set 
> (e.g. no beacons or probes).
>
> RR
>
> ------------------------------------------------------------------------
>
> *From:*Nabil BENAMAR [mailto:benamar73@gmail.com]
> *Sent:* Wednesday, February 1, 2017 7:53 AM
> *To:* Jérôme Härri
> *Cc:* Dr. Hans-Joachim Fischer; Alexandre Petrescu; its@ietf.org
> *Subject:* Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 figure 
> comparing .11 to .11-OCB
>
> Hi Alex, Jerome, All
>
> *//*
>
> I agree with Jerome to illustrate the SLAAC in the process of IPv6 
> configuration.
>
> It will show that there is no difference with other networks in the IP 
> layer.
>
>
>
>
> Best Regards,
> Nabil
>
>> On Feb 1, 2017, at 11:15 AM, Jérôme Härri <jerome.haerri@eurecom.fr 
>> <mailto:jerome.haerri@eurecom.fr>> wrote:
>>
>> Hello Alex, All
>>
>> I agree with Hans-Joachim, no beacon in OCB mode..and in general, we 
>> do not need to show ‘beacons’ in the chart, as even the association 
>> process does not ‘need’ a beacon…it just depends on if you do 
>> ‘active’ or ‘passive’ scanning.
>>
>> So, if you want to avoid any misunderstanding, you can also simply 
>> remove beacons from the drawing and mention ‘active scanning’…if you 
>> want to keep it, then if you use a beacon, then you do not need the 
>> probes (and mention ‘passive’ scanning)..directly association (to the 
>> best of my knowledge..)
>>
>> As for the data chart, it is also unclear..I would also tend to say 
>> that it could be easier to have bi-directional arrows for ‘data’ in 
>> both cases.
>>
>> Another point: this document is about IPv6..I would therefore suggest 
>> maybe to add the IPv6 processes (so that we have IPv6 data). So, you 
>> could add the SLAAC charts and maybe even Router 
>> Solicitation/advertisement charts. What do you think? These would be 
>> common between WLAN and OCB…we could then just visually show that we 
>> bypass some ‘lower layer’ phases, but IP remains similar. This could 
>> also help us with the statement that IPv6 needs to guarantee the 
>> security process that OCB is not doing…with such chart, that could help.
>>
>> Best Regards,
>>
>> Jérôme
>>
>> *From:*its [mailto:its-bounces@ietf.org]*On Behalf Of*Dr. 
>> Hans-Joachim Fischer
>> *Sent:*Wednesday 01 February 2017 11:58
>> *To:*its@ietf.org <mailto:its@ietf.org>
>> *Subject:*Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 figure 
>> comparing .11 to .11-OCB
>>
>>   * Beacons are not known in OCB mode
>>   * Data goes bi-directional
>>
>> Hans-Joachim Fischer
>>
>> Am 01.02.2017 um 11:44 schrieb Alexandre Petrescu:
>>
>>> draft-ietf-ipwave-ipv6-over-80211ocb-00 figure comparing .11 to .11-OCB
>>>
>>> Hello IPWAVErs,
>>>
>>> I suggested to illustrate the differences between .11 and .11-OCB by 
>>> means of a figure, and a co-author produced it.  Unless there is 
>>> opposition I will include it in the draft.
>>>
>>> STA AP STA AP
>>> | | | |
>>>      |<------ Beacon -------| |<------ Beacon -------|
>>> | | | |
>>>      |---- Probe Req. ----->| |------- Data -------->|
>>>      |<--- Probe Res. ------| |------- Data -------->|
>>> | | |------- Data -------->|
>>>      |---- Auth Req. ------>| |------- Data -------->|
>>>      |<--- Auth Res. -------| |------- Data -------->|
>>> | | |------- Data -------->|
>>>      |---- Asso Req. ------>| |------- Data -------->|
>>>      |<--- Asso Res. -------| |------- Data -------->|
>>> | | |------- Data -------->|
>>>      |------- Data -------->| |------- Data -------->|
>>>      |------- Data -------->| |------- Data -------->|
>>>
>>>      (a) Traditional IEEE 802.11 (b) IEEE 802.11 OCB mode
>>>
>>>
>>> Yours,
>>>
>>> Alex
>>>
>>> _______________________________________________
>>> its mailing list
>>> its@ietf.org <mailto:its@ietf.org>
>>> https://www.ietf.org/mailman/listinfo/its
>>>
>>
>>
>>
>> -- 
>> Dr. Hans-Joachim Fischer
>> Managing Director
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