Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 RSU term - localisation sensors

[Alexandre Petrescu <[e-mail]>]

If the app-level data generated by these sensors (lat/long/alt, time) 
are put in UDP or other payloads of IP then it makes sense to talk about 
these sensors in these RSUs routers.

But, up to now, ITS deployments do this:
- POI over something else than IP
- TSA is not mandatory (Time Stamp Advertisement).

Alternatively, one would do something like this:
- POI as PIDF-LO data (RFC5491) over IP
- IP Router Advertisements containing timestamps (to be defined)
- NTP over IP to send timestamps.

Then we can talk here about location sensors in RSU router boxes...

Alex

Le 10/02/2017 à 19:52, Rex Buddenberg a écrit :
> Box <> function.
>
> If you understand the fragility and warts in radionav systems (GPS,
> Galileo, Glonass, Loran) then differential overlays to these systems
> makes a lot of sense.  And the most attractive place to put the
> differential reference receivers is in the roadside boxes.  The
> reference receiver function is a sensor function, not a routing one.
> But probably belongs in the same box.
>
>
> On Fri, 2017-02-10 at 12:49 +0100, Jérôme Härri wrote:
>> Hi Alex,
>>
>> It could actually be two different terms, depending of what we want
>> to say in the draft. The RSU is no longer a pure C-ITS name, as even
>> LTE-V2X adopted the LTE-UE operating in RSU mode for LTE-V2V
>> communications (meaning you do not need to be a eNB/base station to
>> be a RSU).
>> I would tend to think that the RSU is more a function/service than an
>> actual technology...but as I think the debate could be complex and
>> suggest to follow Michelle suggestion to keep the RSU as a 'bigger'
>> entity, and if you need it, a RSR as a potential sub-set of a RSU. As
>> Michelle said, a RSU is not a router  by default...
>>
>> BR,
>>
>> Jérôme
>>
>> -----Original Message-----
>> From: its [mailto:[e-mail]] On Behalf Of Alexandre
>> Petrescu
>> Sent: Friday 10 February 2017 12:37
>> To: Michelle Wetterwald
>> Cc: [e-mail]
>> Subject: Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 RSU
>> term
>>
>> Hi Michelle,
>>
>> Thank you for the suggestion.
>>
>> But making RSR a component of RSU is different than making RSU a
>> component of RSR, right?
>>
>> Despite the widespread belief that RSU would have something to do
>> with IP and Internet, rarely if ever was there an RSU connected to
>> Internet that forwarded IP packets - most RSUs are disconnected from
>> the Internet (the supposedly 'slaves' at FHWA) and the ones that are
>> connected to the Internet (supposedly the 'masters' at FHWA) are so
>> only in order to be SNMP-managed remotely, but not to forward.
>>
>> If we know of some RSU which has this 'forwarding' flag set to 1,
>> then we should talk about it, and call it a Router.
>>
>> The "ITS station" term is not a term at IETF.  We could re-use the
>> term "ITS station", but I would like to know whether "ITS Station" is
>> a Router or a Host?
>>
>> Yours,
>>
>> Alex
>>
>> Le 10/02/2017 à 12:18, Michelle Wetterwald a écrit :
>>>
>>> Hi Alex,
>>>
>>> Actually, an RSU is generally more than an RSR as it is an ITS
>>> station
>>> per se and may contain upper (e.g. service or even
>>> application) layers. I suggest to keep the definition of RSU in
>>> the
>>> text, as it is a widely used term, but clarify that an RSR could
>>> be
>>> one of the components of an RSU.
>>>
>>> Best regards, Michelle
>>>
>>> 2017-02-10 11:34 GMT+01:00 Alexandre Petrescu
>>> <[e-mail]
>>> <mailto:[e-mail]>>:
>>>
>>> draft-ietf-ipwave-ipv6-over-80211ocb-00 RSU term
>>>
>>> Hello IPWAVErs,
>>>
>>> We received multiple comments about the RSU term.  The strongest
>>> issue
>>> is that apparently there are conflicts between our assumption of
>>> RSU
>>> to be a router and FHWA(?) thinking RSU is more like an interface
>>> to a
>>> router, or something like a master-RSU controlling
>>> (slave?) RSUs. Unless FHWA tells us they agree RSU is a router, I
>>> will
>>> modify the following:
>>>
>>> Old:
>>>
>>> 2.  Terminology
>>>
>>> [...]
>>>
>>> RSU: Road Side Unit.
>>>
>>>
>>> New:
>>>
>>> RSR: Road Side Router; an IP router equipped with, or connected to,
>>> at
>>> least one interface that is 802.11 and that is an interface that
>>> operates in OCB mode.
>>>
>>>
>>> and substitute RSR for RSU throughout.
>>>
>>> This old 'RSU' term, now RSR, is absolutely needed in the draft
>>> when
>>> discussing IP handovers and Mobile IP.
>>>
>>> Alex
>>>
>>>
>>> _______________________________________________ its mailing list
>>> [e-mail] <mailto:[e-mail]>
>>> https://www.ietf.org/mailman/listinfo/its
>>> <https://www.ietf.org/mailman/listinfo/its>
>>>
>>>
>>>
>>>
>>> -- Michelle Wetterwald [e-mail]
>>> <mailto:[e-mail]>
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