Session Description Protocol (SDP) Media Capabilities Negotiation
RFC 6871
Document | Type |
RFC - Proposed Standard
(February 2013; No errata)
Updates RFC 5939
|
|
---|---|---|---|
Authors | Robert Gilman , Roni Even , Flemming Andreasen | ||
Last updated | 2018-12-20 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Miguel GarcĂa | ||
Shepherd write-up | Show (last changed 2012-10-04) | ||
IESG | IESG state | RFC 6871 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Gonzalo Camarillo | ||
IESG note | Miguel Garcia (Miguel.A.Garcia@ericsson.com) is the Document Shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) R. Gilman Request for Comments: 6871 Independent Updates: 5939 R. Even Category: Standards Track Huawei Technologies ISSN: 2070-1721 F. Andreasen Cisco Systems February 2013 Session Description Protocol (SDP) Media Capabilities Negotiation Abstract Session Description Protocol (SDP) capability negotiation provides a general framework for indicating and negotiating capabilities in SDP. The base framework defines only capabilities for negotiating transport protocols and attributes. This documents extends the framework by defining media capabilities that can be used to negotiate media types and their associated parameters. This document updates the IANA Considerations of RFC 5939. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6871. Gilman, et al. Standards Track [Page 1] RFC 6871 SDP Media Capabilities Negotiation February 2013 Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Gilman, et al. Standards Track [Page 2] RFC 6871 SDP Media Capabilities Negotiation February 2013 Table of Contents 1. Introduction ....................................................4 2. Terminology .....................................................4 3. SDP Media Capabilities ..........................................6 3.1. Requirements ...............................................6 3.2. Solution Overview ..........................................7 3.3. New Capability Attributes .................................13 3.3.1. The Media Format Capability Attributes .............13 3.3.2. The Media Format Parameter Capability Attribute ....16 3.3.3. The Media-Specific Capability Attribute ............19 3.3.4. New Configuration Parameters .......................21 3.3.5. The Latent Configuration Attribute .................23 3.3.6. Enhanced Potential Configuration Attribute .........25 3.3.7. Substitution of Media Payload Type Numbers in Capability ......................................29 3.3.8. The Session Capability Attribute ...................30 3.4. Offer/Answer Model Extensions .............................35 3.4.1. Generating the Initial Offer .......................35 3.4.2. Generating the Answer ..............................39 3.4.3. Offerer Processing of the Answer ...................43 3.4.4. Modifying the Session ..............................43 4. Examples .......................................................44 4.1. Alternative Codecs ........................................44Show full document text