Media Resource Control Protocol Version 2 (MRCPv2)
RFC 6787
Document | Type | RFC - Proposed Standard (November 2012; Errata) | |
---|---|---|---|
Authors | Daniel Burnett , Saravanan Shanmugham | ||
Last updated | 2015-10-14 | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6787 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Robert Sparks | ||
IESG note | Eric Burger (eburger@standardstrack.com) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) D. Burnett Request for Comments: 6787 Voxeo Category: Standards Track S. Shanmugham ISSN: 2070-1721 Cisco Systems, Inc. November 2012 Media Resource Control Protocol Version 2 (MRCPv2) Abstract The Media Resource Control Protocol Version 2 (MRCPv2) allows client hosts to control media service resources such as speech synthesizers, recognizers, verifiers, and identifiers residing in servers on the network. MRCPv2 is not a "stand-alone" protocol -- it relies on other protocols, such as the Session Initiation Protocol (SIP), to coordinate MRCPv2 clients and servers and manage sessions between them, and the Session Description Protocol (SDP) to describe, discover, and exchange capabilities. It also depends on SIP and SDP to establish the media sessions and associated parameters between the media source or sink and the media server. Once this is done, the MRCPv2 exchange operates over the control session established above, allowing the client to control the media processing resources on the speech resource server. 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/rfc6787. Copyright Notice Copyright (c) 2012 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 Burnett & Shanmugham Standards Track [Page 1] RFC 6787 MRCPv2 November 2012 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 8 2. Document Conventions . . . . . . . . . . . . . . . . . . . . 9 2.1. Definitions . . . . . . . . . . . . . . . . . . . . . . 10 2.2. State-Machine Diagrams . . . . . . . . . . . . . . . . . 10 2.3. URI Schemes . . . . . . . . . . . . . . . . . . . . . . 11 3. Architecture . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1. MRCPv2 Media Resource Types . . . . . . . . . . . . . . 12 3.2. Server and Resource Addressing . . . . . . . . . . . . . 14 4. MRCPv2 Basics . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1. Connecting to the Server . . . . . . . . . . . . . . . . 14 4.2. Managing Resource Control Channels . . . . . . . . . . . 14 4.3. SIP Session Example . . . . . . . . . . . . . . . . . . 17 4.4. Media Streams and RTP Ports . . . . . . . . . . . . . . 22 4.5. MRCPv2 Message Transport . . . . . . . . . . . . . . . . 24 4.6. MRCPv2 Session Termination . . . . . . . . . . . . . . . 24 5. MRCPv2 Specification . . . . . . . . . . . . . . . . . . . . 24 5.1. Common Protocol Elements . . . . . . . . . . . . . . . . 25 5.2. Request . . . . . . . . . . . . . . . . . . . . . . . . 28 5.3. Response . . . . . . . . . . . . . . . . . . . . . . . . 29 5.4. Status Codes . . . . . . . . . . . . . . . . . . . . . . 30 5.5. Events . . . . . . . . . . . . . . . . . . . . . . . . . 31Show full document text