RE: [Sip] Alert-Info Idea (was Re: Commenton draft-willis-sip-an sweralert-01)
"Vaidya, Maulik" <maulik.vaidya@siemens.com> Thu, 27 October 2005 15:24 UTC
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From: "Vaidya, Maulik" <maulik.vaidya@siemens.com>
To: sip@ietf.org
Subject: RE: [Sip] Alert-Info Idea (was Re: Commenton draft-willis-sip-an sweralert-01)
Date: Thu, 27 Oct 2005 08:21:48 -0700
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Gents, pardon my ignorance if I say something really stupid Shouldn't 'semantic URNs' in some manner, shape or form include the format of alert (i.e. wav, mp3 etc), and the preferred medium of download (i.e. HTTP, WAP etc)? (because not all UACs will have the capability to support all forms of alert tones and download mechanisms. -Maulik -----Original Message----- From: sip-bounces@ietf.org [mailto:sip-bounces@ietf.org] On Behalf Of dave.robbins@verizon.com Sent: Thursday, October 27, 2005 10:08 AM To: Paul Kyzivat Cc: sip@ietf.org; MARJOU Xavier RD-MAPS-LAN; sip-bounces@ietf.org; leo@cisco.com; Dean Willis Subject: Re: [Sip] Alert-Info Idea (was Re: Commenton draft-willis-sip-answeralert-01) Agreed. Defining URNs "semantically" is what I had in mind. In an application carried over from the PSTN, distinctive alerting takes one of two different forms, depending upon whether it is rendered as power ringing or as a call-waiting alert tone. I would want to use a single URN, which the UAS would render in whatever way is appropriate for the current state of the device. Other semantic forms are surely useful as well. I can also see the potential value in having a URN that carries a specific rendering. Dave Robbins Verizon Laboratories 40 Sylvan Rd. Waltham, MA 02451-1128 781 466 4188 "Paul Kyzivat" <pkyzivat@cisco.c om> To Dave C. 10/27/2005 09:54 Robbins/EMPL/MA/Verizon@VZNotes AM cc "Dean Willis" <dean.willis@softarmor.com>, sip@ietf.org, "MARJOU Xavier RD-MAPS-LAN" <xavier.marjou@francetelecom.com>, sip-bounces@ietf.org, leo@cisco.com Subject Re: [Sip] Alert-Info Idea (was Re: Comment on draft-willis-sip-answeralert-01) I think it would be good if there was a set of URNs that are defined *semantically* rather than defining precisely what should be rendered. These would be of much broader applicability than those that specify particular audio waveforms, etc., because they could be rendered in a variety of ways: audio, video, tactile, in different languages, etc. However there is probably value in having ones that have specific renderings as well. There could also be scenarios where one entity (e.g. representing the caller) inserts a URN that is semantic in nature, and another entity (e.g. representing the callee) replaces that with a different URN (or URI) that identifies a specific rendering that is consistent with the intended semantic, the capabilities of the UAS, and the desires of the UAS in terms of culturally specific values. Paul dave.robbins@verizon.com wrote: > I agree wholeheartedly with Dean. A URL is a nice, generic way to > specify an alert signal, but unless you know what sort of URLs your > client understands, it's not very useful. Some clients might > understand a URL that > returns an audio file, but for other clients that might be totally useless. > A set of standardized URNs that includes the various alerting patterns > typically used in traditional telephony applications would be of great > interest to me and my work. This would include the standard North American > alerting patterns generically identified by the integers one through five, > perhaps expressed more generically in some manner. And I imagine that there > are other forms of alerting that could be accepted as standard. In my > current work, we have had to invent a notation for this, and I've been > suggesting that we think about promoting a standard of some sort. > > Dave Robbins > Verizon Laboratories > 40 Sylvan Rd. > Waltham, MA 02451-1128 > 781 466 4188 > > > > "Dean Willis" > <dean.willis@soft > armor.com> To > Sent by: "MARJOU Xavier RD-MAPS-LAN" > sip-bounces@ietf. <xavier.marjou@francetelecom.com> > org cc > sip@ietf.org, leo@cisco.com > Subject > 10/26/2005 11:20 [Sip] Alert-Info Idea (was Re: > PM Comment on > > draft-willis-sip-answeralert-01) > > > > > > > > > > > > On Sep 13, 2005, at 4:59 PM, MARJOU Xavier RD-MAPS-LAN wrote: > > >>Hi, >> >>When reading Req-5 with "some sorts of emergency session", I >>understand that an "emergency mass alert" is a candidate use-case. >> >>Thus, in section 6, I suggest a new value for the Alert-Mode header >>field: "Amplified" so that as many people as possible are alerted >>(e.g. >>an amplified ring tone). In this case, a UAS could also decide to >>increase the volume of audio. >> > > > I've been thinking about this, and working on some client specs, and > I'm beginning to think that maybe the Alert-Info header might offer a > better way to do this, as well as do a number of other things > (including possibly the alert-mode function of the draft in question). > Maybe somebody already suggested this, and it just now percolated > through my brain, so I apologize if I'm failing to credit this idea > correctly. > > The problem with Alert-Info is that it's almost completely > unspecified. As I read it, 3261 says it takes a URL as a value, > without providing any way to negotiate (or confirm) the range of URLs > that might be meaningful to the UAS. Not good. > > Some implementations (aka Cisco) use totally bogus integers or > cadence-maps or other stuff in the Alert-Info header. Also not good. > > What if we were to define a series of URNs that refer to standardized > alert-behaviors? We could have registered URNS for: > > 1) Normal alert > 2) Distinctive alert (possibly indexed by an integer, for different > distinctive alerts) > 3) Null alert (which provides for the alert-mode behavior from this > draft) > 4) One or more types of request-encoded alerts, like the Cisco > integers, where the encoded value is carried as a URN parameter set > 5) Emergency alert > > We could lump these into one URN set (namespace?) and associate a SIP > OPTION tag with support for the entire set of alerting behaviors. I > think of this as "basic alerting options", and we could bound up the > whole set in one I-D. > > Thus, an INVITE request might carry something like: > > Alert-Info: urn:org.ietf.sip.alert.basic//emergency > Require: alert.basic > > or maybe: > > Alert-Info: urn:org.ietf.sip.alert.basic//distinct.1 > > or > > Alert-Info: urn:org.ietf.sip.alert.basic//cadence?3,1,3,5 > > > Then for "downloaded" alert sets (aka HTTP or other URLS) we could > potentially have additional URN sets, perhaps by URL type, or by > payload type, or some other combination. This could provide subject > material for additional IDs. > > -- > Dean > > > _______________________________________________ > Sip mailing list https://www1.ietf.org/mailman/listinfo/sip > This list is for NEW development of the core SIP Protocol Use > sip-implementors@cs.columbia.edu for questions on current sip Use > sipping@ietf.org for new developments on the application of sip > > > > > > _______________________________________________ > Sip mailing list https://www1.ietf.org/mailman/listinfo/sip > This list is for NEW development of the core SIP Protocol Use > sip-implementors@cs.columbia.edu for questions on current sip Use > sipping@ietf.org for new developments on the application of sip > _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use sip-implementors@cs.columbia.edu for questions on current sip Use sipping@ietf.org for new developments on the application of sip _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use sip-implementors@cs.columbia.edu for questions on current sip Use sipping@ietf.org for new developments on the application of sip
- RE: [Sip] Alert-Info Idea (was Re: Commenton draf… Vaidya, Maulik
- Re: [Sip] Alert-Info Idea (was Re: Commenton draf… Paul Kyzivat
- RE: [Sip] Alert-Info Idea (was Re: Commenton draf… Elwell, John
- Re: [Sip] Alert-Info Idea (was Re: Commenton draf… Paul Kyzivat