Once again I apologise, I have not been able to react before on this.
From: ofono-bounces(a)ofono.org [mailto:email@example.com] On Behalf Of Marcel
Sent: Wednesday, November 03, 2010 11:40 AM
To: Sjur Brændeland
Cc: Ahmed, Suhail; Simon ETHBRIDGE; mats.tuneld(a)stericsson.com; ofono(a)ofono.org
Subject: Re: [RFC] AGPS Support
Or do we expect oFono core to do something with this data? I am
the impression that oFono core is just a pipe here.
And in conclusion we have XML and ASN.1 adding some overhead to the
actual data that is encoded. None of them is coming for free.
If we wanna look at this not from the 27.007 standard angle, then we
have to look at what the users of this D-Bus are talking and what would
be easiest for them.
These last sentences did not provoke any comments or reactions, but I would have expected
they did because they are pointing out an important fact.
Ofono, in this feature, is just a pipe. The choice for proposing ASN.1 containers or more
exactly passing directing RRC frames, RRLP frames or other air interface protocols frames
was driven by a simple fact: this data formatting can be easily supported, if not already
supported, by nearly all the GPS vendors or positioning application frameworks, and this,
thanks to the SUPL clients which are embedded inside positioning application frameworks or
Going to standard AT commands is virtuous, and all of us should support this.
But the fact is that these AT commands for positioning support with xml dtd (CPOS and
CPOSR) are a late addition of release 8 end of 2008 while the corresponding features had
been introduced in the 3GPP standard 9 or 10 years ago (just check R99 04.31!). So the GPS
and positioning industry had to find its own way before several years before the 3GPP
minds proposing something.
As of today, I'm suspicious about proposing the XML format as the only ofono
Do we have commitments from GPS vendors or positioning framework vendors or telephone
integrators that they are going to use the XML format?
Does STE GPS framework supports these XML formats?
I think these considerations should be put in the balance before pushing a single
Thanks for reading me up to here,
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