Media Server Control Protocol Requirements
RFC 5167
| Document | Type | RFC - Informational (March 2008; No errata) | |
|---|---|---|---|
| Authors | Martin Dolly , Roni Even | ||
| Last updated | 2018-12-20 | ||
| Replaces | draft-dolly-mediactrl-requirements | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5167 (Informational) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Jon Peterson | ||
| Send notices to | (None) | ||
Network Working Group M. Dolly
Request for Comments: 5167 AT&T Labs
Category: Informational R. Even
Polycom
March 2008
Media Server Control Protocol Requirements
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Abstract
This document addresses the communication between an application
server and media server. The current work in IETF working groups
shows these logical entities, but it does not address the physical
decomposition and the protocol between the entities.
This document presents the requirements for a Media Server Control
Protocol (MCP) that enables an application server to use a media
server. It will address the aspects of announcements, Interactive
Voice Response, and conferencing media services.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Media Control Requirements . . . . . . . . . . . . . . . . 3
3.2. Media mixing Requirements . . . . . . . . . . . . . . . . . 5
3.3. IVR Requirements . . . . . . . . . . . . . . . . . . . . . 6
3.4. Operational Requirements . . . . . . . . . . . . . . . . . 6
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 6
5. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 7
6. Informative References . . . . . . . . . . . . . . . . . . . . 7
Dolly & Even Informational [Page 1]
RFC 5167 MCP Requirements March 2008
1. Introduction
The IETF conferencing framework in RFC 4353 [CARCH] presents an
architecture that is built of several functional entities. RFC 4353
[CARCH] does not specify the protocols between the functional
entities since it is considered out of scope.
Based on RFC 4353 [CARCH], this document defines the requirements for
a protocol that will enable one functional entity, known as an
Application Server (AS), that includes the conference/media policy
server, the notification server, and the focus, all defined in RFC
4353 [CARCH], to interact with one or more functional entities,
called Media Server (MS), that serves as mixer or media server.
The media server can also be used for announcements and Interactive
Voice Response (IVR) functions.
Application servers host one or more instances of a communication
application. Media servers provide real time media processing
functions. An example of the decomposition of a media server and an
application server is described in the media control framework
document [MEDIACTRL-FW].
This document presents the requirements for a Media Server Control
Protocol (MCP) that enables an application server to control a media
server. It will address the aspects of announcements, IVR, and
conferencing media services.
The requirements are for the protocol and do not address the AS or MS
functionality discussed in the media control framework.
Since the media server is a centralized component, the charter of the
working group states that this work will not investigate distributed
media processing algorithms or control protocols.
2. Terminology
The media server work uses, when appropriate, and expands on the
terminology introduced in the conferencing framework [CARCH] and
Centralized Conferencing (XCON) framework [XCON-FRMWRK]. The
following additional terms are defined:
Application Server (AS) - A functional entity that hosts one or more
instances of a communication application. The application server may
include the conference policy server, the focus, and the conference
notification server, as defined in [CARCH]. Also, it may include
communication applications that use IVR or announcement services.
Dolly & Even Informational [Page 2]
RFC 5167 MCP Requirements March 2008
Media Server (MS) - The media server includes the mixer as defined in
[CARCH]. The media server plays announcements, it processes media
streams for functions like Dual Tone Multi-Frequency (DTMF) detection
and transcoding. The media server may also record media streams for
supporting IVR functions like announcing participants
Media Resource Broker (MRB) - A logical entity that is responsible
for both the collection of appropriate published Media Server (MS)
information and supplying of appropriate MS information to consuming
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