Re: 3GPP 23.038 encoding and string length

[Pascal Quantin <pascal.quantin () gmail com>]

2013/12/24 Guy Harris <guy () alum mit edu>

> On Dec 24, 2013, at 12:45 PM, Pascal Quantin <pascal.quantin () gmail com>
> wrote:
>
> > I would vote for proto_tree_add_gsm_7bits_item() as TS 23.038 talks
> about 8 bits data and UCS2 encoding also and defines this alphabet as GSM
> 7bit. We should not put SMS in its name as it has a much wider use in 3GPP
> / 3GPP2.
>
> 3GPP2 isn't GSM. :-)  (Or, speaking as a North American, perhaps that
> should be :-( - at least with LTE maybe everybody will be doing their
> mobile phone/mobile-broadband-not-called-WiMAX-etc. stuff the same way,
> even if, with LTE, you are in a maze of twisty little frequency bands, all
> different.  Maybe someday in my lifetime all mobile
> phones/tablets/mobile-phone-modems/etc. will be world phones/etc.....)
>
> That's why I'd vote for not putting "gsm" into the name, either; it's also
> used by ANSI IS-637-A.

Well, ANSI IS-37-A refers to this encoding as GSM 7bit also ;) And as its
own ANSI 7 bits encoding format (which encoding is different - starting
from MSB and not LSB).


> And a "7 bit item" could be a single 7-bit field, so I'd vote for
> proto_tree_add_ts_23_038_7bits_item().

That could be a trade-off :p

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