Re: [stir] Making STIR SIP messages smaller

[Roman Shpount <[e-mail]>]

Unfortunately, the message increase caused by the Identity header causes a
call failure rate increase of at least a few percent. There is a
substantial number of deployments affected by this and unlike things like
History-Info, this feature is now required by law.
_____________
Roman Shpount


On Tue, Apr 13, 2021 at 1:50 PM Mary Barnes <[e-mail]>
wrote:

> Yeah - like nearly 20 years ago when we added headers like History-Info.
>  And, really if you want to use a text based protocol, you surely can't
> have small message sizes as a design priority.
>
> On Tue, Apr 13, 2021 at 4:40 AM Christer Holmberg <christer.holmberg=
> [e-mail]> wrote:
>
>>
>>
>> >I agree that we need to figure out a way to make Identity headers
>> smaller. As it stands right now, the Identity header with "shaken" PASSporT
>> type adds around 600 bytes to an INVITE message.
>>
>> >This makes typical SIP INVITE messages go from around 1K in size to
>> 1.6K, which is bigger than the UDP MTU.
>>
>>
>>
>> With or without Identity, didn’t that ship sail a long time ago? :)
>>
>>
>>
>> Regards,
>>
>>
>>
>> Christer
>>
>>
>>
>>
>>
>>
>>
>> On Mon, Apr 12, 2021 at 5:39 PM Alec Fenichel <
>> [e-mail]> wrote:
>>
>> I guess what I am trying to say is that I think we should remove ppt from
>> the examples because as you say, people tend to code to examples and
>> smaller Identity headers would be ideal.
>>
>>
>>
>> I don’t mean to hijack this thread, but I have been meaning to bring this
>> up anyways and it is related. Is there a reason I’m just overlooking for
>> requiring the “info” parameter when a full-form PASSporT is used? If not,
>> can we make it optional? The reason I ask is that with OOB, the transit
>> provider receives a PASSporT out-of-band and then needs to construct an
>> Identity header. Because of the “info” parameter requirement, the transit
>> provider must decode the PASSporT in order to determine the “info”
>> parameter. This is the only reason that a transit provider needs to decode
>> the PASSporT. This isn’t difficult so it doesn’t really matter, but I
>> figured I’d ask about potentially making the “info” parameter optional.
>> Also, it makes the Identity header smaller which is always a good thing.
>>
>>
>>
>> Sincerely,
>>
>>
>>
>> Alec Fenichel
>>
>> Senior Software Architect
>>
>> [e-mail]
>>
>> [phone]
>>
>> TransNexus
>>
>>
>>
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>