A Session Initiation Protocol (SIP) Usage for Trickle ICE
draft-ietf-mmusic-trickle-ice-sip-14
| Document | Type | Active Internet-Draft (mmusic WG) | |
|---|---|---|---|
| Last updated | 2018-04-05 (latest revision 2018-02-24) | ||
| Stream | IETF | ||
| Intended RFC status | Proposed Standard | ||
| Formats | plain text xml pdf html bibtex | ||
| Reviews | SECDIR will not review this version | ||
| Stream | WG state | Submitted to IESG for Publication (wg milestone: Oct 2017 - Submit SIP usage for... ) | |
| Document shepherd | Flemming Andreasen | ||
| Shepherd write-up | Show (last changed 2017-11-14) | ||
| IESG | IESG state | IESG Evaluation::Revised I-D Needed | |
| Consensus Boilerplate | Yes | ||
| Telechat date |
Has 3 DISCUSSes. Has enough positions to pass once DISCUSS positions are resolved. |
||
| Responsible AD | Ben Campbell | ||
| Send notices to | (None) | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | None | ||
Network Working Group E. Ivov
Internet-Draft Jitsi
Intended status: Standards Track T. Stach
Expires: August 27, 2018 Unaffiliated
E. Marocco
Telecom Italia
C. Holmberg
Ericsson
February 23, 2018
A Session Initiation Protocol (SIP) Usage for Trickle ICE
draft-ietf-mmusic-trickle-ice-sip-14
Abstract
The Interactive Connectivity Establishment (ICE) protocol describes a
Network Address Translator (NAT) traversal mechanism for UDP-based
multimedia sessions established with the Offer/Answer model. The ICE
extension for Incremental Provisioning of Candidates (Trickle ICE)
defines a mechanism that allows ICE Agents to shorten session
establishment delays by making the candidate gathering and
connectivity checking phases of ICE non-blocking and by executing
them in parallel.
This document defines usage semantics for Trickle ICE with the
Session Initiation Protocol (SIP) and defines a new SIP Info Package
to support this usage.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 27, 2018.
Ivov, et al. Expires August 27, 2018 [Page 1]
Internet-Draft Trickle ICE for SIP February 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Discovery issues . . . . . . . . . . . . . . . . . . . . 5
3.2. Relationship with the Offer/Answer Model . . . . . . . . 6
4. Incremental Signaling of ICE candidates . . . . . . . . . . . 7
4.1. Initial Offer/Answer Exchange . . . . . . . . . . . . . . 8
4.1.1. Sending the Initial Offer . . . . . . . . . . . . . . 8
4.1.2. Receiving the Initial Offer . . . . . . . . . . . . . 9
4.1.3. Sending the Initial Answer . . . . . . . . . . . . . 9
4.1.4. Receiving the Initial Answer . . . . . . . . . . . . 10
4.2. Subsequent Offer/Answer Exchanges . . . . . . . . . . . . 10
4.3. Establishing the Dialog . . . . . . . . . . . . . . . . . 10
4.3.1. Establishing Dialog State through Reliable
Offer/Answer Delivery . . . . . . . . . . . . . . . . 11
4.3.2. Establishing Dialog State through Unreliable
Offer/Answer Delivery . . . . . . . . . . . . . . . . 12
4.3.3. Initiating Trickle ICE without an SDP Answer . . . . 14
4.3.4. Considerations for Third Party Call Control . . . . . 15
4.4. Delivering Candidates in INFO Requests . . . . . . . . . 17
5. Initial Discovery of Trickle ICE Support . . . . . . . . . . 22
5.1. Provisioning Support for Trickle ICE . . . . . . . . . . 22
5.2. Trickle ICE Discovery with Globally Routable User Agent
URIs (GRUU) . . . . . . . . . . . . . . . . . . . . . . . 22
5.3. Fall-back to Half Trickle . . . . . . . . . . . . . . . . 23
6. Considerations for RTP and RTCP Multiplexing . . . . . . . . 24
7. Considerations for Media Multiplexing . . . . . . . . . . . . 26
8. SDP 'end-of-candidates' Attribute . . . . . . . . . . . . . . 29
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