Media Resource Control Protocol Version 2 (MRCPv2)
RFC 6787
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RFC - Proposed Standard
(November 2012; Errata)
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Last updated |
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2015-10-14
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IETF
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IESG state |
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RFC 6787 (Proposed Standard)
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Unknown
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Responsible AD |
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Robert Sparks
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Eric Burger (eburger@standardstrack.com) is the document shepherd.
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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
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