Hi, Bob:

All applications (e.g., H.323, SIP) uses signaling messages among its functional entities (e.g., terminal, agents, gatekeepers, proxies, gateways) for communications.

The signaling messages that carry QOS parameters are treated as QOS signaling messages. The applications like SIP and H.323 send signaling messages end-to-end. H.323 uses H.225.0 RAS, Q.931, Annex G, and H.245 signaling protocols. SIP also uses SDP as a part of the signaling messages.

The signaling messages that carry QOS related information can be treated as "End-to-End QOS signaling" messages.

Kindly see the ongoing works of Q.F/16 of SG16. This will provide more information related to your questions.

Hope this helps.

Best regards, Radhika R. Roy

-----Original Message----- From: Bob Braden [mailto:braden@ISI.EDU] Sent: Wednesday, May 30, 2001 7:39 PM To: gratta@lucent.com; sob@harvard.edu; mankin@ISI.EDU; Roy, Radhika R, ALCTA Cc: diffserv@ietf.org; iptel@lists.bell-labs.com; issll@mercury.lcs.mit.edu; megaco@fore.com; sip@lists.bell-labs.com; sipping@ietf.org; tsvwg@ietf.org; hiramatsu.yukio@lab.ntt.co.jp; rbuhrke@lucent.com; tsg11q8@ties.itu.ch; tsg11q9@ties.itu.ch; ITU-SG16@mailbag.cps.INTEL.COM Subject: RE: PROPOSED JOINT ACTIVITY ON A GENERIC PROTOCOL MECHANISM FOR E ND-TO-END QOS SERVICE CONTROL

*> From owner-issll@mercury.lcs.mit.edu Wed May 30 14:59:58 2001 *> From: "Roy, Radhika R, ALCTA" rrroy@att.com *> To: gratta@lucent.com, sob@harvard.edu, mankin@ISI.EDU *> Cc: diffserv@ietf.org, iptel@lists.bell-labs.com, issll@mercury.lcs.mit.edu, *> megaco@fore.com, sip@lists.bell-labs.com, sipping@ietf.org, tsvwg@ietf.org, *> Yukio Hiramatsu *> hiramatsu.yukio@lab.ntt.co.jp, rbuhrke@lucent.com, *> tsg11q8@ties.itu.ch, tsg11q9@ties.itu.ch, ITU-SG16@mailbag.cps.INTEL.COM *> Subject: RE: PROPOSED JOINT ACTIVITY ON A GENERIC PROTOCOL MECHANISM FOR E *> ND-TO-END QOS SERVICE CONTROL *> Date: Wed, 30 May 2001 17:21:14 -0400 *> MIME-Version: 1.0 *> *> Hi, Everyone: *> *> Question Q.F/16 of ITU-T SG16 is fully dedicated for developing standards *> for "End-to-End QOS for Multimedia Applications". Contributions are also *> being under discussion in the ITU-T SG16 Brazil May 28 - June 8, 2001 *> meeting.

This is very confusing. "End-to-End QOS for Multimedia Applications" is an really important topic, but this topic must be a superset of "End-to-End QOS signaling". There are much harder problems than signaling in providing E2E QoS. Can you explain how signaling relates to the title of this working party?

Thanks,

Bob Braden

*> *> Applications like H.323, SIP, H.324, H.310, and others will also be able to *> use this Q.F/16's QOS signaling protocol. MEGACO/H.248 and BICC will also be *> able to use this when specs are fully developed and, TIPHON's QOS mechanisms *> can also be used as one of the mechanisms for implementations.

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