Re: [ipwave] which BSM?

[William Whyte <[e-mail]>]

I don't fully understand why IPWAVE, which is about network / transport
protocols, needs to have an opinion about what form of BSM to use.

Cheers,

William

On Tue, Apr 16, 2019 at 10:58 AM Alexandre Petrescu <
[e-mail]> wrote:

> Sri,
>
> Thank you very much for the email.
>
> I would like to take this opportunity to discuss publicly a particular
> topic in your email, that we already touched upon in private a few
> months ago.
>
> I purposefully keep the other ideas of you out of this email, but I do
> agree with very many of them.
>
> Le 16/04/2019 à 05:11, Sri Gundavelli (sgundave) a écrit :
> [...]
> > From the point of view of vehicular safety, its about exchange of
> > BSM (Basic Safety Messages) between vehicles as per SAEJ735
> > standard.
>
> Sri, but there are at least three versions of BSM.
>
> Which BSM do you mean?
>
> Why SAE and not ISO?  Both have 'International' in their names.
>
> Why SAE 2016 and not SAE 2009?
>
> - SAEJ2735 version 2009 (free access),
>    (google hits "SAE J2735")
> - SAEJ2735 version 2016 (paid access, cca 100 USD),
>    (google hits "SAE J2735")
> - and the ISO/CEN/ETSI versions (free access):
>    https://www.tc278.eu/cits
>    https://standards.iso.org/iso/ts/19091/addgrp_c
>
> (remark I dont mention ETSI CAM, which is ITS safety in Europe).
>
> The three seem to be different in contents, to a few people.  Myself I
> identified the first and second to be distinct.
>
> Ideally, safety would be just one standard, right?  Something like a
> combination of all BSM versions with the CAM version running on a
> transport that is common to all.
>
> A safe car would need to be able to understand all these CAM and BSM
> versions; if it misses just one because of some syntax error, well,
> safety would be at stake.
>
> > [...] and for very good reason IEEE WAVE standards did not bother to
> > require IPv6 transport for carrying these messages.
>
> I doubt that reason.
>
> Alex
>
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