ETSI 27.007 and HSPA+

[Dan Williams]

On Wed, 2015-01-07 at 09:46 +0000, Cristian Morales Vega wrote:
> I was looking at ModemManager sources to try to understand how to
> identify the use of HSPA+ in a standard ETSI 27.007 device and I got a
> bit more confused.
> 
> include/ModemManager-enums.h defines the MMModemAccessTechnology enum
> with this comment:
> @MM_MODEM_ACCESS_TECHNOLOGY_HSPA_PLUS: HSPA+ (ETSI 27.007: "UTRAN w/HSPA+").
> 
> But I can't find "UTRAN w/HSPA+" in ETSI 27.007.
> src/mm-modem-helpers.c:get_mm_access_tech_from_etsi_access_tech()
> seems to agree with me.
> 
> I guess the comment in MMModemAccessTechnology is wrong?
> In any case, can somebody confirm that there is no way to identify a
> GPRS (I guess you can through AT+CPSB) or HSPA+ connections using just
> ETSI 27.007? Somebody knows the reasoning for it being omitted in ETSI
> 27.007?

You're right, the phrase "HSPA" isn't used anywhere in ETSI 27.007 that
I can find, so I think it's an error in ModemManager documentation.
HSPA+ is what a network that uses carrier aggregation and/or MIMO is
typically called, and ETSI 27.007 often doesn't keep up with the latest
stuff.  Which is why the firmware people extended their proprietary
commands to report "HSPA+" instead I suppose.

Dan