Session Description Protocol (SDP) Attributes for Open Mobile Alliance (OMA) Broadcast (BCAST) Service and Content Protection
RFC 5159
| Document | Type |
RFC - Informational
(March 2008; No errata)
Was draft-dondeti-oma-mmusic-sdp-attrs (individual in rai area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-dondeti-oma-sip-sdp-attrs | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5159 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Cullen Jennings | ||
| Send notices to | (None) | ||
Network Working Group L. Dondeti, Ed.
Request for Comments: 5159 QUALCOMM, Inc.
Category: Informational A. Jerichow
Nokia Siemens Networks
March 2008
Session Description Protocol (SDP) Attributes for
Open Mobile Alliance (OMA) Broadcast (BCAST)
Service and Content Protection
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 provides descriptions of Session Description Protocol
(SDP) attributes used by the Open Mobile Alliance's Broadcast Service
and Content Protection specification.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. New SDP Attributes . . . . . . . . . . . . . . . . . . . . . . 2
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
5.1. Registration of New SDP Attributes . . . . . . . . . . . . 3
5.1.1. Registration of the Attribute
bcastversion:<major>.<minor> . . . . . . . . . . . . . 3
5.1.2. Registration of the Attribute stkmstream:<id of
the stkm stream> . . . . . . . . . . . . . . . . . . . 4
5.1.3. Registration of the Attribute
SRTPAuthentication:<id for SRTP authentication
algorithm value> . . . . . . . . . . . . . . . . . . . 5
5.1.4. Registration of the Attribute SRTPROCTxRate:<ROC
transmission rate> . . . . . . . . . . . . . . . . . . 5
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 6
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.1. Normative References . . . . . . . . . . . . . . . . . . . 6
7.2. Informative References . . . . . . . . . . . . . . . . . . 6
Dondeti & Jerichow Informational [Page 1]
RFC 5159 OMA BCAST SDP Attributes March 2008
1. Introduction
The Open Mobile Alliance (OMA) Broadcast (BCAST) group is specifying
service and content protection mechanisms for broadcast services over
wireless networks. As part of that specification, several new SDP
attributes are necessary to allow the broadcast server to signal the
service and content protection parameters to clients.
Section 8.2.4 of RFC 4566 [1] requires that new SDP attributes are
registered through IANA with name, contact information, and
description (and other similar parameters). A standards track
specification is RECOMMENDED if the new attribute(s) will have
widespread use and interoperability considerations.
OMA BCAST specifications are expected to be used by broadcast
wireless systems that are based on 3rd Generation Partnership Project
(3GPP) Multimedia Broadcast/Multicast Service (MBMS), 3GPP2 Broadcast
and Multicast Services (BCMCS), and Digital Video Broadcasting -
Handheld (DVB-H). Although this would typically be considered a
"widespread" use, in this case IETF chose to use a non-standards-
track RFC to register the SDP attributes because OMA maintains change
control of the documents that specify the interpretation of the
values in the attributes.
This document provides descriptions of the SDP attributes used in the
OMA BCAST Service and Content Protection specification [2].
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [3].
3. New SDP Attributes
The following new SDP attributes have been specified:
o a=bcastversion:<major>.<minor>
o a=stkmstream:<id of the stkm stream>
o a=SRTPAuthentication:<id for SRTP authentication algorithm value>
o a=SRTPROCTxRate:<ROC transmission rate>
See Section 5 for details on IANA considerations.
Dondeti & Jerichow Informational [Page 2]
RFC 5159 OMA BCAST SDP Attributes March 2008
4. Security Considerations
In addition to the notes in Section 7 of RFC 4566 [1], the following
considerations may be applicable:
The bcastversion parameter indicates the version of the broadcast
system used for distribution of broadcast content. In case future
versions indicated by this parameter allow for enhanced or additional
security features, the bcastversion parameter, if unprotected, could
be utilized for downgrade attacks.
The stkmstream parameter provides references to relevant key
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