draft-ietf-mmusic-sdp-mux-attributes-17.txt   draft-ietf-mmusic-sdp-mux-attributes-18.txt 
Network Working Group S. Nandakumar Network Working Group S. Nandakumar
Internet-Draft Cisco Internet-Draft Cisco
Intended status: Standards Track February 28, 2018 Intended status: Standards Track August 26, 2020
Expires: September 1, 2018 Expires: February 27, 2021
A Framework for SDP Attributes when Multiplexing A Framework for SDP Attributes when Multiplexing
draft-ietf-mmusic-sdp-mux-attributes-17 draft-ietf-mmusic-sdp-mux-attributes-18
Abstract Abstract
The purpose of this specification is to provide a framework for The purpose of this specification is to provide a framework for
analyzing the multiplexing characteristics of Session Description analyzing the multiplexing characteristics of Session Description
Protocol (SDP) attributes when SDP is used to negotiate the usage of Protocol (SDP) attributes when SDP is used to negotiate the usage of
single 5-tuple for sending and receiving media associated with single 5-tuple for sending and receiving media associated with
multiple media descriptions. multiple media descriptions.
This specification also categorizes the existing SDP attributes based This specification also categorizes the existing SDP attributes based
on the framework described herein. on the framework described herein.
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 1, 2018. This Internet-Draft will expire on February 27, 2021.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License. described in the Simplified BSD License.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
skipping to change at page 3, line 29 skipping to change at page 3, line 29
in PSTN . . . . . . . . . . . . . . . . . . . . . . . . . 38 in PSTN . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.43. RFC7272: IDMS Using the RTP Control Protocol (RTCP) . . . 38 5.43. RFC7272: IDMS Using the RTP Control Protocol (RTCP) . . . 38
5.44. RFC5159: Open Mobile Alliance (OMA) Broadcast (BCAST) SDP 5.44. RFC5159: Open Mobile Alliance (OMA) Broadcast (BCAST) SDP
Attributes . . . . . . . . . . . . . . . . . . . . . . . 39 Attributes . . . . . . . . . . . . . . . . . . . . . . . 39
5.45. RFC6193: Media Description for IKE in SDP . . . . . . . . 39 5.45. RFC6193: Media Description for IKE in SDP . . . . . . . . 39
5.46. RFC2326: Real Time Streaming Protocol . . . . . . . . . . 40 5.46. RFC2326: Real Time Streaming Protocol . . . . . . . . . . 40
5.47. RFC6064: SDP and RTSP Extensions for 3GPP . . . . . . . . 41 5.47. RFC6064: SDP and RTSP Extensions for 3GPP . . . . . . . . 41
5.48. RFC3108: ATM SDP . . . . . . . . . . . . . . . . . . . . 43 5.48. RFC3108: ATM SDP . . . . . . . . . . . . . . . . . . . . 43
5.49. 3GPP TS 26.114 . . . . . . . . . . . . . . . . . . . . . 45 5.49. 3GPP TS 26.114 . . . . . . . . . . . . . . . . . . . . . 45
5.50. 3GPP TS 183.063 . . . . . . . . . . . . . . . . . . . . . 46 5.50. 3GPP TS 183.063 . . . . . . . . . . . . . . . . . . . . . 46
5.51. 3GPP TS 24.182 . . . . . . . . . . . . . . . . . . . . . 46 5.51. 3GPP TS 24.229 . . . . . . . . . . . . . . . . . . . . . 46
5.52. 3GPP TS 24.183 . . . . . . . . . . . . . . . . . . . . . 47 5.52. ITU T.38 . . . . . . . . . . . . . . . . . . . . . . . . 47
5.53. 3GPP TS 24.229 . . . . . . . . . . . . . . . . . . . . . 47 5.53. ITU-T Q.1970 . . . . . . . . . . . . . . . . . . . . . . 49
5.54. ITU T.38 . . . . . . . . . . . . . . . . . . . . . . . . 48 5.54. ITU-T H.248.15 . . . . . . . . . . . . . . . . . . . . . 49
5.55. ITU-T Q.1970 . . . . . . . . . . . . . . . . . . . . . . 50 5.55. RFC4975: The Message Session Relay Protocol . . . . . . . 50
5.56. ITU-T H.248.15 . . . . . . . . . . . . . . . . . . . . . 50 5.56. Historical Attributes . . . . . . . . . . . . . . . . . . 51
5.57. RFC4975: The Message Session Relay Protocol . . . . . . . 51 6. bwtype Attribute Analysis . . . . . . . . . . . . . . . . . . 51
5.58. Historical Attributes . . . . . . . . . . . . . . . . . . 52 6.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 52
6. bwtype Attribute Analysis . . . . . . . . . . . . . . . . . . 52 6.2. RFC3556: SDP Bandwidth Modifiers for RTCP Bandwidth . . . 52
6.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 53 6.3. RFC3890: Bandwidth Modifier for SDP . . . . . . . . . . . 53
6.2. RFC3556: SDP Bandwidth Modifiers for RTCP Bandwidth . . . 53 7. rtcp-fb Attribute Analysis . . . . . . . . . . . . . . . . . 53
6.3. RFC3890: Bandwidth Modifier for SDP . . . . . . . . . . . 54 7.1. RFC4585: RTP/AVPF . . . . . . . . . . . . . . . . . . . . 53
7. rtcp-fb Attribute Analysis . . . . . . . . . . . . . . . . . 54 7.2. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 54
7.1. RFC4585: RTP/AVPF . . . . . . . . . . . . . . . . . . . . 54
7.2. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 55
7.3. RFC6285: Unicast-Based Rapid Acquisition of Multicast RTP 7.3. RFC6285: Unicast-Based Rapid Acquisition of Multicast RTP
Sessions (RAMS) . . . . . . . . . . . . . . . . . . . . . 56 Sessions (RAMS) . . . . . . . . . . . . . . . . . . . . . 55
7.4. RFC6679: ECN for RTP over UDP/IP . . . . . . . . . . . . 56 7.4. RFC6679: ECN for RTP over UDP/IP . . . . . . . . . . . . 55
7.5. RFC6642: Third-Party Loss Report . . . . . . . . . . . . 57 7.5. RFC6642: Third-Party Loss Report . . . . . . . . . . . . 56
7.6. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 58 7.6. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 57
8. group Attribute Analysis . . . . . . . . . . . . . . . . . . 58 8. group Attribute Analysis . . . . . . . . . . . . . . . . . . 57
8.1. RFC5888: SDP Grouping Framework . . . . . . . . . . . . . 58 8.1. RFC5888: SDP Grouping Framework . . . . . . . . . . . . . 57
8.2. RFC3524: Mapping Media Streams to Resource 8.2. RFC3524: Mapping Media Streams to Resource
Reservation Flows . . . . . . . . . . . . . . . . . . . . 59 Reservation Flows . . . . . . . . . . . . . . . . . . . . 58
8.3. RFC4091: ANAT Semantics . . . . . . . . . . . . . . . . . 59 8.3. RFC4091: ANAT Semantics . . . . . . . . . . . . . . . . . 58
8.4. RFC5956: FEC Grouping Semantics in SDP . . . . . . . . . 59 8.4. RFC5956: FEC Grouping Semantics in SDP . . . . . . . . . 58
8.5. RFC5583: Signaling Media Decoding Dependency in SDP . . . 60 8.5. RFC5583: Signaling Media Decoding Dependency in SDP . . . 59
8.6. RFC7104: Duplication Grouping Semantics in the SDP . . . 60 8.6. RFC7104: Duplication Grouping Semantics in the SDP . . . 59
9. ssrc-group Attribute Analysis . . . . . . . . . . . . . . . . 61 9. ssrc-group Attribute Analysis . . . . . . . . . . . . . . . . 60
9.1. RFC5576: Source-Specific SDP Attributes . . . . . . . . . 61 9.1. RFC5576: Source-Specific SDP Attributes . . . . . . . . . 60
9.2. RFC7104: Duplication Grouping Semantics in the SDP . . . 61 9.2. RFC7104: Duplication Grouping Semantics in the SDP . . . 60
10. QoS Mechanism Token Analysis . . . . . . . . . . . . . . . . 62 10. QoS Mechanism Token Analysis . . . . . . . . . . . . . . . . 61
10.1. RFC5432: QoS Mechanism Selection in SDP . . . . . . . . 62 10.1. RFC5432: QoS Mechanism Selection in SDP . . . . . . . . 61
11. k= Attribute Analysis . . . . . . . . . . . . . . . . . . . . 62 11. k= Attribute Analysis . . . . . . . . . . . . . . . . . . . . 61
11.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 63 11.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 62
12. content Attribute Analysis . . . . . . . . . . . . . . . . . 63 12. content Attribute Analysis . . . . . . . . . . . . . . . . . 62
12.1. RFC4796 . . . . . . . . . . . . . . . . . . . . . . . . 63 12.1. RFC4796 . . . . . . . . . . . . . . . . . . . . . . . . 62
13. Payload Formats . . . . . . . . . . . . . . . . . . . . . . . 64 12.2. 3GPP TS 24.182 . . . . . . . . . . . . . . . . . . . . . 63
13.1. RFC5109: RTP Payload Format for Generic FEC . . . . . . 64 12.3. 3GPP TS 24.183 . . . . . . . . . . . . . . . . . . . . . 63
13. Payload Formats . . . . . . . . . . . . . . . . . . . . . . . 63
13.1. RFC5109: RTP Payload Format for Generic FEC . . . . . . 63
14. Multiplexing Considerations for Encapsulating Attributes . . 64 14. Multiplexing Considerations for Encapsulating Attributes . . 64
14.1. RFC3407: cpar Attribute Analysis . . . . . . . . . . . . 65 14.1. RFC3407: cpar Attribute Analysis . . . . . . . . . . . . 64
14.2. RFC5939 Analysis . . . . . . . . . . . . . . . . . . . . 65 14.2. RFC5939 Analysis . . . . . . . . . . . . . . . . . . . . 65
14.2.1. Recommendation: Procedures for Potential 14.2.1. Recommendation: Procedures for Potential
Configuration Pairing . . . . . . . . . . . . . . . 66 Configuration Pairing . . . . . . . . . . . . . . . 66
14.2.1.1. Example: Transport Capability Multiplexing . . . 67 14.2.1.1. Example: Transport Capability Multiplexing . . . 67
14.2.1.2. Example: Attribute Capability Multiplexing . . . 68 14.2.1.2. Example: Attribute Capability Multiplexing . . . 68
14.3. RFC6871 Analysis . . . . . . . . . . . . . . . . . . . . 69 14.3. RFC6871 Analysis . . . . . . . . . . . . . . . . . . . . 68
14.3.1. Recommendation: Dealing with Payload Type Numbers . 69 14.3.1. Recommendation: Dealing with Payload Type Numbers . 68
14.3.1.1. Example: Attribute Capability Under Shared 14.3.1.1. Example: Attribute Capability Under Shared
Payload Type . . . . . . . . . . . . . . . . . . 69 Payload Type . . . . . . . . . . . . . . . . . . 69
14.3.2. Recommendation: Dealing with Latent Configurations . 70 14.3.2. Recommendation: Dealing with Latent Configurations . 70
15. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 71 15. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 70
15.1. New 'Multiplexing Categories' subregistry . . . . . . . 71 15.1. New 'Multiplexing Categories' subregistry . . . . . . . 70
15.2. 'Mux Category' column for subregistries . . . . . . . . 72 15.2. 'Mux Category' column for subregistries . . . . . . . . 71
15.2.1. Table: SDP bwtype . . . . . . . . . . . . . . . . . 72 15.2.1. Table: SDP bwtype . . . . . . . . . . . . . . . . . 72
15.2.2. Table: att-field (session level) . . . . . . . . . . 72 15.2.2. Table: att-field (session level) . . . . . . . . . . 72
15.2.3. Table: att-field (both session and media level) . . 73 15.2.3. Table: att-field (both session and media level) . . 73
15.2.4. Table: att-field (media level only) . . . . . . . . 75 15.2.4. Table: att-field (media level only) . . . . . . . . 75
15.2.5. Table: att-field (source level) . . . . . . . . . . 78 15.2.5. Table: att-field (source level) . . . . . . . . . . 78
15.2.6. Table: content SDP Parameters . . . . . . . . . . . 79 15.2.6. Table: content SDP Parameters . . . . . . . . . . . 79
15.2.7. Table: Semantics for the 'group' SDP Attribute . . . 79 15.2.7. Table: Semantics for the 'group' SDP Attribute . . . 79
15.2.8. Table: 'rtcp-fb' Attribute Values . . . . . . . . . 80 15.2.8. Table: 'rtcp-fb' Attribute Values . . . . . . . . . 79
15.2.9. Table: 'ack' and 'nack' Attribute Values . . . . . . 80 15.2.9. Table: 'ack' and 'nack' Attribute Values . . . . . . 80
15.2.10. Table: 'depend' SDP Attribute Values . . . . . . . . 80 15.2.10. Table: 'depend' SDP Attribute Values . . . . . . . . 80
15.2.11. Table: 'cs-correlation' Attribute Values . . . . . . 81 15.2.11. Table: 'cs-correlation' Attribute Values . . . . . . 81
15.2.12. Table: Semantics for the 'ssrc-group' SDP Attribute 81 15.2.12. Table: Semantics for the 'ssrc-group' SDP Attribute 81
15.2.13. Table: SDP/RTSP key management protocol identifiers 81 15.2.13. Table: SDP/RTSP key management protocol identifiers 81
15.2.14. Table: Codec Control Messages . . . . . . . . . . . 82 15.2.14. Table: Codec Control Messages . . . . . . . . . . . 82
15.2.15. Table: QoS Mechanism Tokens . . . . . . . . . . . . 82 15.2.15. Table: QoS Mechanism Tokens . . . . . . . . . . . . 82
15.2.16. Table: SDP Capability Negotiation Option Tags . . . 82 15.2.16. Table: SDP Capability Negotiation Option Tags . . . 82
15.2.17. Table: Timestamp Reference Clock Source Parameters . 83 15.2.17. Table: Timestamp Reference Clock Source Parameters . 83
15.2.18. Table: Media Clock Source Parameters . . . . . . . . 83 15.2.18. Table: Media Clock Source Parameters . . . . . . . . 83
16. Security Considerations . . . . . . . . . . . . . . . . . . . 84 16. Security Considerations . . . . . . . . . . . . . . . . . . . 83
17. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 84 17. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 83
18. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . 84 18. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . 84
19. References . . . . . . . . . . . . . . . . . . . . . . . . . 88 19. References . . . . . . . . . . . . . . . . . . . . . . . . . 88
19.1. Normative References . . . . . . . . . . . . . . . . . . 88 19.1. Normative References . . . . . . . . . . . . . . . . . . 88
19.2. Informative References . . . . . . . . . . . . . . . . . 88 19.2. Informative References . . . . . . . . . . . . . . . . . 88
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 97 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 96
1. Introduction 1. Introduction
SDP defines several attributes for capturing characteristics that SDP defines several attributes for capturing characteristics that
apply to the individual media descriptions (described by "m=" lines") apply to the individual media descriptions (described by "m=" lines")
and the overall multimedia session. Typically different media types and the overall multimedia session. Typically different media types
(audio, video, etc.) described using different media descriptions (audio, video, etc.) described using different media descriptions
represent separate RTP sessions that are carried over individual represent separate RTP sessions that are carried over individual
transport layer flows. However transport layer flows. However
[I-D.ietf-mmusic-sdp-bundle-negotiation] defines a way to use a [I-D.ietf-mmusic-sdp-bundle-negotiation] defines a way to use a
skipping to change at page 15, line 39 skipping to change at page 15, line 39
+----------+------------------------------------+-------+-----------+ +----------+------------------------------------+-------+-----------+
| rtcp- | RTP and RTCP Multiplexing affects | M | IDENTICAL | | rtcp- | RTP and RTCP Multiplexing affects | M | IDENTICAL |
| mux | the entire RTP session | | | | mux | the entire RTP session | | |
| | | | | | | | | |
+----------+------------------------------------+-------+-----------+ +----------+------------------------------------+-------+-----------+
5.3 RFC5761 Attribute Analysis 5.3 RFC5761 Attribute Analysis
5.4. RFC3312: Integration of Resource Management and SIP 5.4. RFC3312: Integration of Resource Management and SIP
[RFC3312] defines a generic framework for preconditions, which are [RFC3312] defines a generic framework for preconditions, which are
extensible through IANA registration. This document also discusses extensible through IANA registration. This document also discusses
how network quality of service can be made a precondition for how network quality of service can be made a precondition for
establishment of sessions initiated by the Session Initiation establishment of sessions initiated by the Session Initiation
Protocol (SIP). These preconditions require that the participant Protocol (SIP). These preconditions require that the participant
reserve network resources before continuing with the session. reserve network resources before continuing with the session.
+-------+-----------------------+-------+--------------+ +-------+-----------------------+-------+--------------+
| Name | Notes | Level | Mux Category | | Name | Notes | Level | Mux Category |
+-------+-----------------------+-------+--------------+ +-------+-----------------------+-------+--------------+
| des | Refer to notes below | M | CAUTION | | des | Refer to notes below | M | CAUTION |
skipping to change at page 46, line 38 skipping to change at page 46, line 38
| bc_service | Not Impacted | S | NORMAL | | bc_service | Not Impacted | S | NORMAL |
| | | | | | | | | |
| bc_program | Not Impacted | S | NORMAL | | bc_program | Not Impacted | S | NORMAL |
| | | | | | | | | |
| bc_service_package | Not Impacted | S | NORMAL | | bc_service_package | Not Impacted | S | NORMAL |
| | | | | | | | | |
+---------------------+---------------+-------+--------------+ +---------------------+---------------+-------+--------------+
5.50 3GPP TS 183.063 Attribute Analysis 5.50 3GPP TS 183.063 Attribute Analysis
5.51. 3GPP TS 24.182 5.51. 3GPP TS 24.229
[R3GPPTS24.182] specifies IP multimedia subsystem Custom Alerting
tones
+------------+----------------------------------+-------+-----------+
| Name | Notes | Level | Mux |
| | | | Category |
+------------+----------------------------------+-------+-----------+
| g.3gpp.cat | Usage defined for the IP | M | NORMAL |
| | Multimedia Subsystem | | |
| | | | |
+------------+----------------------------------+-------+-----------+
5.51 3GPP TS 24.182 Attribute Analysis
5.52. 3GPP TS 24.183
[R3GPPTS24.183] specifies IP multimedia subsystem Custom Ringing
Signal
+------------+----------------------------------+-------+-----------+
| Name | Notes | Level | Mux |
| | | | Category |
+------------+----------------------------------+-------+-----------+
| g.3gpp.crs | Usage defined for the IP | M | NORMAL |
| | Multimedia Subsystem | | |
| | | | |
+------------+----------------------------------+-------+-----------+
5.52 3GPP TS 24.183 Attribute Analysis
5.53. 3GPP TS 24.229
[R3GPPTS24.229] specifies IP multimedia call control protocol based [R3GPPTS24.229] specifies IP multimedia call control protocol based
on Session Initial protocol and Session Description Protocol. on Session Initial protocol and Session Description Protocol.
+-----------------+-----------------------------+-------+-----------+ +-----------------+-----------------------------+-------+-----------+
| Name | Notes | Level | Mux | | Name | Notes | Level | Mux |
| | | | Category | | | | | Category |
+-----------------+-----------------------------+-------+-----------+ +-----------------+-----------------------------+-------+-----------+
| secondary- | secondary-realm MUST be | M | TRANSPORT | | secondary- | secondary-realm MUST be | M | TRANSPORT |
| realm | the one that corresponds to | | | | realm | the one that corresponds to | | |
skipping to change at page 48, line 39 skipping to change at page 47, line 39
| omr-m-bw | Not Impacted | M | NORMAL | | omr-m-bw | Not Impacted | M | NORMAL |
| | | | | | | | | |
| omr-s-bw | Not Impacted | M | NORMAL | | omr-s-bw | Not Impacted | M | NORMAL |
| | | | | | | | | |
| omr-codecs | Not Impacted | M | NORMAL | | omr-codecs | Not Impacted | M | NORMAL |
| | | | | | | | | |
+-----------------+-----------------------------+-------+-----------+ +-----------------+-----------------------------+-------+-----------+
5.53 3GPP TS 24.229 Attribute Analysis 5.53 3GPP TS 24.229 Attribute Analysis
5.54. ITU T.38 5.52. ITU T.38
[T.38] defines procedures for real-time Group 3 facsimile [T.38] defines procedures for real-time Group 3 facsimile
communications over IP networks. communications over IP networks.
+-----------------------+--------------------+-------+--------------+ +-----------------------+--------------------+-------+--------------+
| Name | Notes | Level | Mux Category | | Name | Notes | Level | Mux Category |
+-----------------------+--------------------+-------+--------------+ +-----------------------+--------------------+-------+--------------+
| T38FaxVersion | Refer to notes | M | TBD | | T38FaxVersion | Refer to notes | M | TBD |
| | below | | | | | below | | |
| | | | | | | | | |
skipping to change at page 50, line 12 skipping to change at page 49, line 12
5.54 ITU T.38 Attribute Analysis 5.54 ITU T.38 Attribute Analysis
NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation], NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation],
there exists no publicly available specification that defines there exists no publicly available specification that defines
procedures for multiplexing/demultiplexing fax protocols flows over a procedures for multiplexing/demultiplexing fax protocols flows over a
single 5-tuple. Once such a specification is available, the single 5-tuple. Once such a specification is available, the
multiplexing category assignments for the attributes in this section multiplexing category assignments for the attributes in this section
could be revisited. could be revisited.
5.55. ITU-T Q.1970 5.53. ITU-T Q.1970
[Q.1970] defines Bearer Independent Call Control (BICC) IP bearer [Q.1970] defines Bearer Independent Call Control (BICC) IP bearer
control protocol. control protocol.
+-------+----------------------------------------+-------+----------+ +-------+----------------------------------------+-------+----------+
| Name | Notes | Level | Mux | | Name | Notes | Level | Mux |
| | | | Category | | | | | Category |
+-------+----------------------------------------+-------+----------+ +-------+----------------------------------------+-------+----------+
| ipbcp | ipbcp version identifies type of IP | S | SPECIAL | | ipbcp | ipbcp version identifies type of IP | S | SPECIAL |
| | bearer control protocol (IPBCP) | | | | | bearer control protocol (IPBCP) | | |
| | message used in BICC (ITU-T Q.1901) | | | | | message used in BICC (ITU-T Q.1901) | | |
| | environment which are limited to | | | | | environment which are limited to | | |
| | single media payload. Refer to the | | | | | single media payload. Refer to the | | |
| | pertinent ITU-T specifications while | | | | | pertinent ITU-T specifications while | | |
| | multiplexing | | | | | multiplexing | | |
| | | | | | | | | |
+-------+----------------------------------------+-------+----------+ +-------+----------------------------------------+-------+----------+
5.55 ITU-T Q.1970 Attribute Analysis 5.55 ITU-T Q.1970 Attribute Analysis
5.56. ITU-T H.248.15 5.54. ITU-T H.248.15
ITU-T H.248.15 [H.248.15] defines Gateway Control Protocol SDP H.248 ITU-T H.248.15 [H.248.15] defines Gateway Control Protocol SDP H.248
package attribute package attribute
+----------+-------------------------------------+-------+----------+ +----------+-------------------------------------+-------+----------+
| Name | Notes | Level | Mux | | Name | Notes | Level | Mux |
| | | | Category | | | | | Category |
+----------+-------------------------------------+-------+----------+ +----------+-------------------------------------+-------+----------+
| h248item | It is only applicable for signaling | B | SPECIAL | | h248item | It is only applicable for signaling | B | SPECIAL |
| | the inclusion of H.248 extension | | | | | the inclusion of H.248 extension | | |
| | packages to a gateway via the local | | | | | packages to a gateway via the local | | |
skipping to change at page 51, line 31 skipping to change at page 50, line 31
| | between them. The ITU-T will need | | | | | between them. The ITU-T will need | | |
| | to do further analysis of various | | | | | to do further analysis of various | | |
| | packages when they specify how to | | | | | packages when they specify how to | | |
| | signal the use of multiplexing to a | | | | | signal the use of multiplexing to a | | |
| | gateway | | | | | gateway | | |
| | | | | | | | | |
+----------+-------------------------------------+-------+----------+ +----------+-------------------------------------+-------+----------+
5.56 ITU-T H.248.15 Attribute Analysis 5.56 ITU-T H.248.15 Attribute Analysis
5.57. RFC4975: The Message Session Relay Protocol 5.55. RFC4975: The Message Session Relay Protocol
[RFC4975] the Message Session Relay Protocol, a protocol for [RFC4975] the Message Session Relay Protocol, a protocol for
transmitting a series of related instant messages in the context of a transmitting a series of related instant messages in the context of a
session. Message sessions are treated like any other media stream session. Message sessions are treated like any other media stream
when set up via a rendezvous or session creation protocol such as the when set up via a rendezvous or session creation protocol such as the
Session Initiation Protocol. Session Initiation Protocol.
+----------------------+---------------------+-------+--------------+ +----------------------+---------------------+-------+--------------+
| Name | Notes | Level | Mux Category | | Name | Notes | Level | Mux Category |
+----------------------+---------------------+-------+--------------+ +----------------------+---------------------+-------+--------------+
skipping to change at page 52, line 31 skipping to change at page 51, line 31
5.57 RFC4975 Attribute Analysis 5.57 RFC4975 Attribute Analysis
NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation], NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation],
there exists no publicly available specification that defines there exists no publicly available specification that defines
procedures for multiplexing/demultiplexing MRSP flows over a single procedures for multiplexing/demultiplexing MRSP flows over a single
5-tuple. Once such a specification is available, the multiplexing 5-tuple. Once such a specification is available, the multiplexing
categories assignments for the attributes in this section could be categories assignments for the attributes in this section could be
revisited. revisited.
5.58. Historical Attributes 5.56. Historical Attributes
This section specifies analysis for the attributes that are included This section specifies analysis for the attributes that are included
for historic usage alone by the [IANA]. for historic usage alone by the [IANA].
+----------+----------------------+-------+--------------+ +----------+----------------------+-------+--------------+
| Name | Notes | Level | Mux Category | | Name | Notes | Level | Mux Category |
+----------+----------------------+-------+--------------+ +----------+----------------------+-------+--------------+
| rtpred1 | Historic attributes | M | CAUTION | | rtpred1 | Historic attributes | M | CAUTION |
| | | | | | | | | |
| rtpred2 | Historic attributes | M | CAUTION | | rtpred2 | Historic attributes | M | CAUTION |
skipping to change at page 64, line 5 skipping to change at page 63, line 5
| content:main | Not Impacted | M | NORMAL | | content:main | Not Impacted | M | NORMAL |
| | | | | | | | | |
| content:sl | Not Impacted | M | NORMAL | | content:sl | Not Impacted | M | NORMAL |
| | | | | | | | | |
| content:alt | Not Impacted | M | NORMAL | | content:alt | Not Impacted | M | NORMAL |
| | | | | | | | | |
+------------------+---------------+-------+--------------+ +------------------+---------------+-------+--------------+
12.1 RFC4796 Attribute Analysis 12.1 RFC4796 Attribute Analysis
12.2. 3GPP TS 24.182
[R3GPPTS24.182] specifies IP multimedia subsystem Custom Alerting
tones
+-------------+---------------+-------+--------------+
| Name | Notes | Level | Mux Category |
+-------------+---------------+-------+--------------+
| g.3gpp.cat | Not Impacted | M | NORMAL |
| | | | |
+-------------+---------------+-------+--------------+
12.2 3GPP TS 24.182 Attribute Analysis
12.3. 3GPP TS 24.183
[R3GPPTS24.183] specifies IP multimedia subsystem Custom Ringing
Signal
+-------------+---------------+-------+--------------+
| Name | Notes | Level | Mux Category |
+-------------+---------------+-------+--------------+
| g.3gpp.crs | Not Impacted | M | NORMAL |
| | | | |
+-------------+---------------+-------+--------------+
12.3 3GPP TS 24.183 Attribute Analysis
13. Payload Formats 13. Payload Formats
13.1. RFC5109: RTP Payload Format for Generic FEC 13.1. RFC5109: RTP Payload Format for Generic FEC
[RFC5109] describes a payload format for generic Forward Error [RFC5109] describes a payload format for generic Forward Error
Correction (FEC) for media data encapsulated in RTP. It is based on Correction (FEC) for media data encapsulated in RTP. It is based on
the exclusive-or (parity) operation. The payload format allows end the exclusive-or (parity) operation. The payload format allows end
systems to apply protection using various protection lengths and systems to apply protection using various protection lengths and
levels, in addition to using various protection group sizes to adapt levels, in addition to using various protection group sizes to adapt
to different media and channel characteristics. It enables complete to different media and channel characteristics. It enables complete
skipping to change at page 88, line 28 skipping to change at page 88, line 17
o Added new section for dealing with FEC payload types. o Added new section for dealing with FEC payload types.
19. References 19. References
19.1. Normative References 19.1. Normative References
[I-D.ietf-mmusic-sdp-bundle-negotiation] [I-D.ietf-mmusic-sdp-bundle-negotiation]
Holmberg, C., Alvestrand, H., and C. Jennings, Holmberg, C., Alvestrand, H., and C. Jennings,
"Negotiating Media Multiplexing Using the Session "Negotiating Media Multiplexing Using the Session
Description Protocol (SDP)", draft-ietf-mmusic-sdp-bundle- Description Protocol (SDP)", draft-ietf-mmusic-sdp-bundle-
negotiation-48 (work in progress), January 2018. negotiation-54 (work in progress), December 2018.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997. Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC4566] Handley, M., Jacobson, V., and C. Perkins, "SDP: Session [RFC4566] Handley, M., Jacobson, V., and C. Perkins, "SDP: Session
Description Protocol", RFC 4566, DOI 10.17487/RFC4566, Description Protocol", RFC 4566, DOI 10.17487/RFC4566,
July 2006, <https://www.rfc-editor.org/info/rfc4566>. July 2006, <https://www.rfc-editor.org/info/rfc4566>.
[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", RFC 5226, IANA Considerations Section in RFCs", RFC 5226,
DOI 10.17487/RFC5226, May 2008, <https://www.rfc- DOI 10.17487/RFC5226, May 2008,
editor.org/info/rfc5226>. <https://www.rfc-editor.org/info/rfc5226>.
19.2. Informative References 19.2. Informative References
[H.248.15] [H.248.15]
"Gateway control protocol: SDP H.248 package attribute", "Gateway control protocol: SDP H.248 package attribute",
<http://www.itu.int/rec/T-REC-H.248.15>. <http://www.itu.int/rec/T-REC-H.248.15>.
[I-D.ietf-mmusic-rfc4566bis] [I-D.ietf-mmusic-rfc4566bis]
Begen, A., Kyzivat, P., Perkins, C., and M. Handley, "SDP: Begen, A., Kyzivat, P., Perkins, C., and M. Handley, "SDP:
Session Description Protocol", draft-ietf-mmusic- Session Description Protocol", draft-ietf-mmusic-
rfc4566bis-25 (work in progress), February 2018. rfc4566bis-37 (work in progress), August 2019.
[IANA] "Session Description Protocol (SDP) Parameters", [IANA] "Session Description Protocol (SDP) Parameters",
<http://www.iana.org/assignments/sdp-parameters/ <http://www.iana.org/assignments/sdp-parameters/sdp-
sdp-parameters.xml>. parameters.xml>.
[Q.1970] "Q.1970 : BICC IP bearer control protocol", [Q.1970] "Q.1970 : BICC IP bearer control protocol",
<https://www.itu.int/rec/T-REC-Q.1970-200609-I/en>. <https://www.itu.int/rec/T-REC-Q.1970-200609-I/en>.
[R3GPPTS183.063] [R3GPPTS183.063]
"TISPAN - IMS based ITPV Stage 3 specification.", "TISPAN - IMS based ITPV Stage 3 specification.",
<http://www.etsi.org/deliver/ <http://www.etsi.org/deliver/
etsi_ts/183000_183099/183063/02.01.00_60/ etsi_ts/183000_183099/183063/02.01.00_60/
ts_183063v020100p.pdf>. ts_183063v020100p.pdf>.
skipping to change at page 89, line 40 skipping to change at page 89, line 33
Initiation Protocol (SIP) and Session Description Protocol Initiation Protocol (SIP) and Session Description Protocol
(SDP);", (SDP);",
<http://www.3gpp.org/ftp/Specs/html-info/24229.htm>. <http://www.3gpp.org/ftp/Specs/html-info/24229.htm>.
[R3GPPTS26.114] [R3GPPTS26.114]
"IP multimedia Subsystem : Media Handling and "IP multimedia Subsystem : Media Handling and
interaction", <http://www.3gpp.org/DynaReport/26114.htm>. interaction", <http://www.3gpp.org/DynaReport/26114.htm>.
[RFC2326] Schulzrinne, H., Rao, A., and R. Lanphier, "Real Time [RFC2326] Schulzrinne, H., Rao, A., and R. Lanphier, "Real Time
Streaming Protocol (RTSP)", RFC 2326, Streaming Protocol (RTSP)", RFC 2326,
DOI 10.17487/RFC2326, April 1998, <https://www.rfc- DOI 10.17487/RFC2326, April 1998,
editor.org/info/rfc2326>. <https://www.rfc-editor.org/info/rfc2326>.
[RFC3108] Kumar, R. and M. Mostafa, "Conventions for the use of the [RFC3108] Kumar, R. and M. Mostafa, "Conventions for the use of the
Session Description Protocol (SDP) for ATM Bearer Session Description Protocol (SDP) for ATM Bearer
Connections", RFC 3108, DOI 10.17487/RFC3108, May 2001, Connections", RFC 3108, DOI 10.17487/RFC3108, May 2001,
<https://www.rfc-editor.org/info/rfc3108>. <https://www.rfc-editor.org/info/rfc3108>.
[RFC3264] Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model [RFC3264] Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model
with Session Description Protocol (SDP)", RFC 3264, with Session Description Protocol (SDP)", RFC 3264,
DOI 10.17487/RFC3264, June 2002, <https://www.rfc- DOI 10.17487/RFC3264, June 2002,
editor.org/info/rfc3264>. <https://www.rfc-editor.org/info/rfc3264>.
[RFC3312] Camarillo, G., Ed., Marshall, W., Ed., and J. Rosenberg, [RFC3312] Camarillo, G., Ed., Marshall, W., Ed., and J. Rosenberg,
"Integration of Resource Management and Session Initiation "Integration of Resource Management and Session Initiation
Protocol (SIP)", RFC 3312, DOI 10.17487/RFC3312, October Protocol (SIP)", RFC 3312, DOI 10.17487/RFC3312, October
2002, <https://www.rfc-editor.org/info/rfc3312>. 2002, <https://www.rfc-editor.org/info/rfc3312>.
[RFC3407] Andreasen, F., "Session Description Protocol (SDP) Simple [RFC3407] Andreasen, F., "Session Description Protocol (SDP) Simple
Capability Declaration", RFC 3407, DOI 10.17487/RFC3407, Capability Declaration", RFC 3407, DOI 10.17487/RFC3407,
October 2002, <https://www.rfc-editor.org/info/rfc3407>. October 2002, <https://www.rfc-editor.org/info/rfc3407>.
[RFC3524] Camarillo, G. and A. Monrad, "Mapping of Media Streams to [RFC3524] Camarillo, G. and A. Monrad, "Mapping of Media Streams to
Resource Reservation Flows", RFC 3524, Resource Reservation Flows", RFC 3524,
DOI 10.17487/RFC3524, April 2003, <https://www.rfc- DOI 10.17487/RFC3524, April 2003,
editor.org/info/rfc3524>. <https://www.rfc-editor.org/info/rfc3524>.
[RFC3550] Schulzrinne, H., Casner, S., Frederick, R., and V. [RFC3550] Schulzrinne, H., Casner, S., Frederick, R., and V.
Jacobson, "RTP: A Transport Protocol for Real-Time Jacobson, "RTP: A Transport Protocol for Real-Time
Applications", STD 64, RFC 3550, DOI 10.17487/RFC3550, Applications", STD 64, RFC 3550, DOI 10.17487/RFC3550,
July 2003, <https://www.rfc-editor.org/info/rfc3550>. July 2003, <https://www.rfc-editor.org/info/rfc3550>.
[RFC3556] Casner, S., "Session Description Protocol (SDP) Bandwidth [RFC3556] Casner, S., "Session Description Protocol (SDP) Bandwidth
Modifiers for RTP Control Protocol (RTCP) Bandwidth", Modifiers for RTP Control Protocol (RTCP) Bandwidth",
RFC 3556, DOI 10.17487/RFC3556, July 2003, RFC 3556, DOI 10.17487/RFC3556, July 2003,
<https://www.rfc-editor.org/info/rfc3556>. <https://www.rfc-editor.org/info/rfc3556>.
[RFC3605] Huitema, C., "Real Time Control Protocol (RTCP) attribute [RFC3605] Huitema, C., "Real Time Control Protocol (RTCP) attribute
in Session Description Protocol (SDP)", RFC 3605, in Session Description Protocol (SDP)", RFC 3605,
DOI 10.17487/RFC3605, October 2003, <https://www.rfc- DOI 10.17487/RFC3605, October 2003,
editor.org/info/rfc3605>. <https://www.rfc-editor.org/info/rfc3605>.
[RFC3611] Friedman, T., Ed., Caceres, R., Ed., and A. Clark, Ed., [RFC3611] Friedman, T., Ed., Caceres, R., Ed., and A. Clark, Ed.,
"RTP Control Protocol Extended Reports (RTCP XR)", "RTP Control Protocol Extended Reports (RTCP XR)",
RFC 3611, DOI 10.17487/RFC3611, November 2003, RFC 3611, DOI 10.17487/RFC3611, November 2003,
<https://www.rfc-editor.org/info/rfc3611>. <https://www.rfc-editor.org/info/rfc3611>.
[RFC3711] Baugher, M., McGrew, D., Naslund, M., Carrara, E., and K. [RFC3711] Baugher, M., McGrew, D., Naslund, M., Carrara, E., and K.
Norrman, "The Secure Real-time Transport Protocol (SRTP)", Norrman, "The Secure Real-time Transport Protocol (SRTP)",
RFC 3711, DOI 10.17487/RFC3711, March 2004, RFC 3711, DOI 10.17487/RFC3711, March 2004,
<https://www.rfc-editor.org/info/rfc3711>. <https://www.rfc-editor.org/info/rfc3711>.
[RFC3890] Westerlund, M., "A Transport Independent Bandwidth [RFC3890] Westerlund, M., "A Transport Independent Bandwidth
Modifier for the Session Description Protocol (SDP)", Modifier for the Session Description Protocol (SDP)",
RFC 3890, DOI 10.17487/RFC3890, September 2004, RFC 3890, DOI 10.17487/RFC3890, September 2004,
<https://www.rfc-editor.org/info/rfc3890>. <https://www.rfc-editor.org/info/rfc3890>.
[RFC4091] Camarillo, G. and J. Rosenberg, "The Alternative Network [RFC4091] Camarillo, G. and J. Rosenberg, "The Alternative Network
Address Types (ANAT) Semantics for the Session Description Address Types (ANAT) Semantics for the Session Description
Protocol (SDP) Grouping Framework", RFC 4091, Protocol (SDP) Grouping Framework", RFC 4091,
DOI 10.17487/RFC4091, June 2005, <https://www.rfc- DOI 10.17487/RFC4091, June 2005,
editor.org/info/rfc4091>. <https://www.rfc-editor.org/info/rfc4091>.
[RFC4145] Yon, D. and G. Camarillo, "TCP-Based Media Transport in [RFC4145] Yon, D. and G. Camarillo, "TCP-Based Media Transport in
the Session Description Protocol (SDP)", RFC 4145, the Session Description Protocol (SDP)", RFC 4145,
DOI 10.17487/RFC4145, September 2005, <https://www.rfc- DOI 10.17487/RFC4145, September 2005,
editor.org/info/rfc4145>. <https://www.rfc-editor.org/info/rfc4145>.
[RFC4567] Arkko, J., Lindholm, F., Naslund, M., Norrman, K., and E. [RFC4567] Arkko, J., Lindholm, F., Naslund, M., Norrman, K., and E.
Carrara, "Key Management Extensions for Session Carrara, "Key Management Extensions for Session
Description Protocol (SDP) and Real Time Streaming Description Protocol (SDP) and Real Time Streaming
Protocol (RTSP)", RFC 4567, DOI 10.17487/RFC4567, July Protocol (RTSP)", RFC 4567, DOI 10.17487/RFC4567, July
2006, <https://www.rfc-editor.org/info/rfc4567>. 2006, <https://www.rfc-editor.org/info/rfc4567>.
[RFC4568] Andreasen, F., Baugher, M., and D. Wing, "Session [RFC4568] Andreasen, F., Baugher, M., and D. Wing, "Session
Description Protocol (SDP) Security Descriptions for Media Description Protocol (SDP) Security Descriptions for Media
Streams", RFC 4568, DOI 10.17487/RFC4568, July 2006, Streams", RFC 4568, DOI 10.17487/RFC4568, July 2006,
<https://www.rfc-editor.org/info/rfc4568>. <https://www.rfc-editor.org/info/rfc4568>.
[RFC4570] Quinn, B. and R. Finlayson, "Session Description Protocol [RFC4570] Quinn, B. and R. Finlayson, "Session Description Protocol
(SDP) Source Filters", RFC 4570, DOI 10.17487/RFC4570, (SDP) Source Filters", RFC 4570, DOI 10.17487/RFC4570,
July 2006, <https://www.rfc-editor.org/info/rfc4570>. July 2006, <https://www.rfc-editor.org/info/rfc4570>.
[RFC4572] Lennox, J., "Connection-Oriented Media Transport over the [RFC4572] Lennox, J., "Connection-Oriented Media Transport over the
Transport Layer Security (TLS) Protocol in the Session Transport Layer Security (TLS) Protocol in the Session
Description Protocol (SDP)", RFC 4572, Description Protocol (SDP)", RFC 4572,
DOI 10.17487/RFC4572, July 2006, <https://www.rfc- DOI 10.17487/RFC4572, July 2006,
editor.org/info/rfc4572>. <https://www.rfc-editor.org/info/rfc4572>.
[RFC4574] Levin, O. and G. Camarillo, "The Session Description [RFC4574] Levin, O. and G. Camarillo, "The Session Description
Protocol (SDP) Label Attribute", RFC 4574, Protocol (SDP) Label Attribute", RFC 4574,
DOI 10.17487/RFC4574, August 2006, <https://www.rfc- DOI 10.17487/RFC4574, August 2006,
editor.org/info/rfc4574>. <https://www.rfc-editor.org/info/rfc4574>.
[RFC4583] Camarillo, G., "Session Description Protocol (SDP) Format [RFC4583] Camarillo, G., "Session Description Protocol (SDP) Format
for Binary Floor Control Protocol (BFCP) Streams", for Binary Floor Control Protocol (BFCP) Streams",
RFC 4583, DOI 10.17487/RFC4583, November 2006, RFC 4583, DOI 10.17487/RFC4583, November 2006,
<https://www.rfc-editor.org/info/rfc4583>. <https://www.rfc-editor.org/info/rfc4583>.
[RFC4585] Ott, J., Wenger, S., Sato, N., Burmeister, C., and J. Rey, [RFC4585] Ott, J., Wenger, S., Sato, N., Burmeister, C., and J. Rey,
"Extended RTP Profile for Real-time Transport Control "Extended RTP Profile for Real-time Transport Control
Protocol (RTCP)-Based Feedback (RTP/AVPF)", RFC 4585, Protocol (RTCP)-Based Feedback (RTP/AVPF)", RFC 4585,
DOI 10.17487/RFC4585, July 2006, <https://www.rfc- DOI 10.17487/RFC4585, July 2006,
editor.org/info/rfc4585>. <https://www.rfc-editor.org/info/rfc4585>.
[RFC4796] Hautakorpi, J. and G. Camarillo, "The Session Description [RFC4796] Hautakorpi, J. and G. Camarillo, "The Session Description
Protocol (SDP) Content Attribute", RFC 4796, Protocol (SDP) Content Attribute", RFC 4796,
DOI 10.17487/RFC4796, February 2007, <https://www.rfc- DOI 10.17487/RFC4796, February 2007,
editor.org/info/rfc4796>. <https://www.rfc-editor.org/info/rfc4796>.
[RFC4975] Campbell, B., Ed., Mahy, R., Ed., and C. Jennings, Ed., [RFC4975] Campbell, B., Ed., Mahy, R., Ed., and C. Jennings, Ed.,
"The Message Session Relay Protocol (MSRP)", RFC 4975, "The Message Session Relay Protocol (MSRP)", RFC 4975,
DOI 10.17487/RFC4975, September 2007, <https://www.rfc- DOI 10.17487/RFC4975, September 2007,
editor.org/info/rfc4975>. <https://www.rfc-editor.org/info/rfc4975>.
[RFC5104] Wenger, S., Chandra, U., Westerlund, M., and B. Burman, [RFC5104] Wenger, S., Chandra, U., Westerlund, M., and B. Burman,
"Codec Control Messages in the RTP Audio-Visual Profile "Codec Control Messages in the RTP Audio-Visual Profile
with Feedback (AVPF)", RFC 5104, DOI 10.17487/RFC5104, with Feedback (AVPF)", RFC 5104, DOI 10.17487/RFC5104,
February 2008, <https://www.rfc-editor.org/info/rfc5104>. February 2008, <https://www.rfc-editor.org/info/rfc5104>.
[RFC5109] Li, A., Ed., "RTP Payload Format for Generic Forward Error [RFC5109] Li, A., Ed., "RTP Payload Format for Generic Forward Error
Correction", RFC 5109, DOI 10.17487/RFC5109, December Correction", RFC 5109, DOI 10.17487/RFC5109, December
2007, <https://www.rfc-editor.org/info/rfc5109>. 2007, <https://www.rfc-editor.org/info/rfc5109>.
[RFC5159] Dondeti, L., Ed. and A. Jerichow, "Session Description [RFC5159] Dondeti, L., Ed. and A. Jerichow, "Session Description
Protocol (SDP) Attributes for Open Mobile Alliance (OMA) Protocol (SDP) Attributes for Open Mobile Alliance (OMA)
Broadcast (BCAST) Service and Content Protection", Broadcast (BCAST) Service and Content Protection",
RFC 5159, DOI 10.17487/RFC5159, March 2008, RFC 5159, DOI 10.17487/RFC5159, March 2008,
<https://www.rfc-editor.org/info/rfc5159>. <https://www.rfc-editor.org/info/rfc5159>.
[RFC5245] Rosenberg, J., "Interactive Connectivity Establishment [RFC5245] Rosenberg, J., "Interactive Connectivity Establishment
(ICE): A Protocol for Network Address Translator (NAT) (ICE): A Protocol for Network Address Translator (NAT)
Traversal for Offer/Answer Protocols", RFC 5245, Traversal for Offer/Answer Protocols", RFC 5245,
DOI 10.17487/RFC5245, April 2010, <https://www.rfc- DOI 10.17487/RFC5245, April 2010,
editor.org/info/rfc5245>. <https://www.rfc-editor.org/info/rfc5245>.
[RFC5285] Singer, D. and H. Desineni, "A General Mechanism for RTP [RFC5285] Singer, D. and H. Desineni, "A General Mechanism for RTP
Header Extensions", RFC 5285, DOI 10.17487/RFC5285, July Header Extensions", RFC 5285, DOI 10.17487/RFC5285, July
2008, <https://www.rfc-editor.org/info/rfc5285>. 2008, <https://www.rfc-editor.org/info/rfc5285>.
[RFC5432] Polk, J., Dhesikan, S., and G. Camarillo, "Quality of [RFC5432] Polk, J., Dhesikan, S., and G. Camarillo, "Quality of
Service (QoS) Mechanism Selection in the Session Service (QoS) Mechanism Selection in the Session
Description Protocol (SDP)", RFC 5432, Description Protocol (SDP)", RFC 5432,
DOI 10.17487/RFC5432, March 2009, <https://www.rfc- DOI 10.17487/RFC5432, March 2009,
editor.org/info/rfc5432>. <https://www.rfc-editor.org/info/rfc5432>.
[RFC5506] Johansson, I. and M. Westerlund, "Support for Reduced-Size [RFC5506] Johansson, I. and M. Westerlund, "Support for Reduced-Size
Real-Time Transport Control Protocol (RTCP): Opportunities Real-Time Transport Control Protocol (RTCP): Opportunities
and Consequences", RFC 5506, DOI 10.17487/RFC5506, April and Consequences", RFC 5506, DOI 10.17487/RFC5506, April
2009, <https://www.rfc-editor.org/info/rfc5506>. 2009, <https://www.rfc-editor.org/info/rfc5506>.
[RFC5547] Garcia-Martin, M., Isomaki, M., Camarillo, G., Loreto, S., [RFC5547] Garcia-Martin, M., Isomaki, M., Camarillo, G., Loreto, S.,
and P. Kyzivat, "A Session Description Protocol (SDP) and P. Kyzivat, "A Session Description Protocol (SDP)
Offer/Answer Mechanism to Enable File Transfer", RFC 5547, Offer/Answer Mechanism to Enable File Transfer", RFC 5547,
DOI 10.17487/RFC5547, May 2009, <https://www.rfc- DOI 10.17487/RFC5547, May 2009,
editor.org/info/rfc5547>. <https://www.rfc-editor.org/info/rfc5547>.
[RFC5576] Lennox, J., Ott, J., and T. Schierl, "Source-Specific [RFC5576] Lennox, J., Ott, J., and T. Schierl, "Source-Specific
Media Attributes in the Session Description Protocol Media Attributes in the Session Description Protocol
(SDP)", RFC 5576, DOI 10.17487/RFC5576, June 2009, (SDP)", RFC 5576, DOI 10.17487/RFC5576, June 2009,
<https://www.rfc-editor.org/info/rfc5576>. <https://www.rfc-editor.org/info/rfc5576>.
[RFC5583] Schierl, T. and S. Wenger, "Signaling Media Decoding [RFC5583] Schierl, T. and S. Wenger, "Signaling Media Decoding
Dependency in the Session Description Protocol (SDP)", Dependency in the Session Description Protocol (SDP)",
RFC 5583, DOI 10.17487/RFC5583, July 2009, RFC 5583, DOI 10.17487/RFC5583, July 2009,
<https://www.rfc-editor.org/info/rfc5583>. <https://www.rfc-editor.org/info/rfc5583>.
[RFC5760] Ott, J., Chesterfield, J., and E. Schooler, "RTP Control [RFC5760] Ott, J., Chesterfield, J., and E. Schooler, "RTP Control
Protocol (RTCP) Extensions for Single-Source Multicast Protocol (RTCP) Extensions for Single-Source Multicast
Sessions with Unicast Feedback", RFC 5760, Sessions with Unicast Feedback", RFC 5760,
DOI 10.17487/RFC5760, February 2010, <https://www.rfc- DOI 10.17487/RFC5760, February 2010,
editor.org/info/rfc5760>. <https://www.rfc-editor.org/info/rfc5760>.
[RFC5761] Perkins, C. and M. Westerlund, "Multiplexing RTP Data and [RFC5761] Perkins, C. and M. Westerlund, "Multiplexing RTP Data and
Control Packets on a Single Port", RFC 5761, Control Packets on a Single Port", RFC 5761,
DOI 10.17487/RFC5761, April 2010, <https://www.rfc- DOI 10.17487/RFC5761, April 2010,
editor.org/info/rfc5761>. <https://www.rfc-editor.org/info/rfc5761>.
[RFC5762] Perkins, C., "RTP and the Datagram Congestion Control [RFC5762] Perkins, C., "RTP and the Datagram Congestion Control
Protocol (DCCP)", RFC 5762, DOI 10.17487/RFC5762, April Protocol (DCCP)", RFC 5762, DOI 10.17487/RFC5762, April
2010, <https://www.rfc-editor.org/info/rfc5762>. 2010, <https://www.rfc-editor.org/info/rfc5762>.
[RFC5763] Fischl, J., Tschofenig, H., and E. Rescorla, "Framework [RFC5763] Fischl, J., Tschofenig, H., and E. Rescorla, "Framework
for Establishing a Secure Real-time Transport Protocol for Establishing a Secure Real-time Transport Protocol
(SRTP) Security Context Using Datagram Transport Layer (SRTP) Security Context Using Datagram Transport Layer
Security (DTLS)", RFC 5763, DOI 10.17487/RFC5763, May Security (DTLS)", RFC 5763, DOI 10.17487/RFC5763, May
2010, <https://www.rfc-editor.org/info/rfc5763>. 2010, <https://www.rfc-editor.org/info/rfc5763>.
[RFC5888] Camarillo, G. and H. Schulzrinne, "The Session Description [RFC5888] Camarillo, G. and H. Schulzrinne, "The Session Description
Protocol (SDP) Grouping Framework", RFC 5888, Protocol (SDP) Grouping Framework", RFC 5888,
DOI 10.17487/RFC5888, June 2010, <https://www.rfc- DOI 10.17487/RFC5888, June 2010,
editor.org/info/rfc5888>. <https://www.rfc-editor.org/info/rfc5888>.
[RFC5939] Andreasen, F., "Session Description Protocol (SDP) [RFC5939] Andreasen, F., "Session Description Protocol (SDP)
Capability Negotiation", RFC 5939, DOI 10.17487/RFC5939, Capability Negotiation", RFC 5939, DOI 10.17487/RFC5939,
September 2010, <https://www.rfc-editor.org/info/rfc5939>. September 2010, <https://www.rfc-editor.org/info/rfc5939>.
[RFC5956] Begen, A., "Forward Error Correction Grouping Semantics in [RFC5956] Begen, A., "Forward Error Correction Grouping Semantics in
the Session Description Protocol", RFC 5956, the Session Description Protocol", RFC 5956,
DOI 10.17487/RFC5956, September 2010, <https://www.rfc- DOI 10.17487/RFC5956, September 2010,
editor.org/info/rfc5956>. <https://www.rfc-editor.org/info/rfc5956>.
[RFC6064] Westerlund, M. and P. Frojdh, "SDP and RTSP Extensions [RFC6064] Westerlund, M. and P. Frojdh, "SDP and RTSP Extensions
Defined for 3GPP Packet-Switched Streaming Service and Defined for 3GPP Packet-Switched Streaming Service and
Multimedia Broadcast/Multicast Service", RFC 6064, Multimedia Broadcast/Multicast Service", RFC 6064,
DOI 10.17487/RFC6064, January 2011, <https://www.rfc- DOI 10.17487/RFC6064, January 2011,
editor.org/info/rfc6064>. <https://www.rfc-editor.org/info/rfc6064>.
[RFC6128] Begen, A., "RTP Control Protocol (RTCP) Port for Source- [RFC6128] Begen, A., "RTP Control Protocol (RTCP) Port for Source-
Specific Multicast (SSM) Sessions", RFC 6128, Specific Multicast (SSM) Sessions", RFC 6128,
DOI 10.17487/RFC6128, February 2011, <https://www.rfc- DOI 10.17487/RFC6128, February 2011,
editor.org/info/rfc6128>. <https://www.rfc-editor.org/info/rfc6128>.
[RFC6189] Zimmermann, P., Johnston, A., Ed., and J. Callas, "ZRTP: [RFC6189] Zimmermann, P., Johnston, A., Ed., and J. Callas, "ZRTP:
Media Path Key Agreement for Unicast Secure RTP", Media Path Key Agreement for Unicast Secure RTP",
RFC 6189, DOI 10.17487/RFC6189, April 2011, RFC 6189, DOI 10.17487/RFC6189, April 2011,
<https://www.rfc-editor.org/info/rfc6189>. <https://www.rfc-editor.org/info/rfc6189>.
[RFC6193] Saito, M., Wing, D., and M. Toyama, "Media Description for [RFC6193] Saito, M., Wing, D., and M. Toyama, "Media Description for
the Internet Key Exchange Protocol (IKE) in the Session the Internet Key Exchange Protocol (IKE) in the Session
Description Protocol (SDP)", RFC 6193, Description Protocol (SDP)", RFC 6193,
DOI 10.17487/RFC6193, April 2011, <https://www.rfc- DOI 10.17487/RFC6193, April 2011,
editor.org/info/rfc6193>. <https://www.rfc-editor.org/info/rfc6193>.
[RFC6230] Boulton, C., Melanchuk, T., and S. McGlashan, "Media [RFC6230] Boulton, C., Melanchuk, T., and S. McGlashan, "Media
Control Channel Framework", RFC 6230, Control Channel Framework", RFC 6230,
DOI 10.17487/RFC6230, May 2011, <https://www.rfc- DOI 10.17487/RFC6230, May 2011,
editor.org/info/rfc6230>. <https://www.rfc-editor.org/info/rfc6230>.
[RFC6236] Johansson, I. and K. Jung, "Negotiation of Generic Image [RFC6236] Johansson, I. and K. Jung, "Negotiation of Generic Image
Attributes in the Session Description Protocol (SDP)", Attributes in the Session Description Protocol (SDP)",
RFC 6236, DOI 10.17487/RFC6236, May 2011, RFC 6236, DOI 10.17487/RFC6236, May 2011,
<https://www.rfc-editor.org/info/rfc6236>. <https://www.rfc-editor.org/info/rfc6236>.
[RFC6284] Begen, A., Wing, D., and T. Van Caenegem, "Port Mapping [RFC6284] Begen, A., Wing, D., and T. Van Caenegem, "Port Mapping
between Unicast and Multicast RTP Sessions", RFC 6284, between Unicast and Multicast RTP Sessions", RFC 6284,
DOI 10.17487/RFC6284, June 2011, <https://www.rfc- DOI 10.17487/RFC6284, June 2011,
editor.org/info/rfc6284>. <https://www.rfc-editor.org/info/rfc6284>.
[RFC6285] Ver Steeg, B., Begen, A., Van Caenegem, T., and Z. Vax, [RFC6285] Ver Steeg, B., Begen, A., Van Caenegem, T., and Z. Vax,
"Unicast-Based Rapid Acquisition of Multicast RTP "Unicast-Based Rapid Acquisition of Multicast RTP
Sessions", RFC 6285, DOI 10.17487/RFC6285, June 2011, Sessions", RFC 6285, DOI 10.17487/RFC6285, June 2011,
<https://www.rfc-editor.org/info/rfc6285>. <https://www.rfc-editor.org/info/rfc6285>.
[RFC6364] Begen, A., "Session Description Protocol Elements for the [RFC6364] Begen, A., "Session Description Protocol Elements for the
Forward Error Correction (FEC) Framework", RFC 6364, Forward Error Correction (FEC) Framework", RFC 6364,
DOI 10.17487/RFC6364, October 2011, <https://www.rfc- DOI 10.17487/RFC6364, October 2011,
editor.org/info/rfc6364>. <https://www.rfc-editor.org/info/rfc6364>.
[RFC6642] Wu, Q., Ed., Xia, F., and R. Even, "RTP Control Protocol [RFC6642] Wu, Q., Ed., Xia, F., and R. Even, "RTP Control Protocol
(RTCP) Extension for a Third-Party Loss Report", RFC 6642, (RTCP) Extension for a Third-Party Loss Report", RFC 6642,
DOI 10.17487/RFC6642, June 2012, <https://www.rfc- DOI 10.17487/RFC6642, June 2012,
editor.org/info/rfc6642>. <https://www.rfc-editor.org/info/rfc6642>.
[RFC6679] Westerlund, M., Johansson, I., Perkins, C., O'Hanlon, P., [RFC6679] Westerlund, M., Johansson, I., Perkins, C., O'Hanlon, P.,
and K. Carlberg, "Explicit Congestion Notification (ECN) and K. Carlberg, "Explicit Congestion Notification (ECN)
for RTP over UDP", RFC 6679, DOI 10.17487/RFC6679, August for RTP over UDP", RFC 6679, DOI 10.17487/RFC6679, August
2012, <https://www.rfc-editor.org/info/rfc6679>. 2012, <https://www.rfc-editor.org/info/rfc6679>.
[RFC6714] Holmberg, C., Blau, S., and E. Burger, "Connection [RFC6714] Holmberg, C., Blau, S., and E. Burger, "Connection
Establishment for Media Anchoring (CEMA) for the Message Establishment for Media Anchoring (CEMA) for the Message
Session Relay Protocol (MSRP)", RFC 6714, Session Relay Protocol (MSRP)", RFC 6714,
DOI 10.17487/RFC6714, August 2012, <https://www.rfc- DOI 10.17487/RFC6714, August 2012,
editor.org/info/rfc6714>. <https://www.rfc-editor.org/info/rfc6714>.
[RFC6773] Phelan, T., Fairhurst, G., and C. Perkins, "DCCP-UDP: A [RFC6773] Phelan, T., Fairhurst, G., and C. Perkins, "DCCP-UDP: A
Datagram Congestion Control Protocol UDP Encapsulation for Datagram Congestion Control Protocol UDP Encapsulation for
NAT Traversal", RFC 6773, DOI 10.17487/RFC6773, November NAT Traversal", RFC 6773, DOI 10.17487/RFC6773, November
2012, <https://www.rfc-editor.org/info/rfc6773>. 2012, <https://www.rfc-editor.org/info/rfc6773>.
[RFC6787] Burnett, D. and S. Shanmugham, "Media Resource Control [RFC6787] Burnett, D. and S. Shanmugham, "Media Resource Control
Protocol Version 2 (MRCPv2)", RFC 6787, Protocol Version 2 (MRCPv2)", RFC 6787,
DOI 10.17487/RFC6787, November 2012, <https://www.rfc- DOI 10.17487/RFC6787, November 2012,
editor.org/info/rfc6787>. <https://www.rfc-editor.org/info/rfc6787>.
[RFC6849] Kaplan, H., Ed., Hedayat, K., Venna, N., Jones, P., and N. [RFC6849] Kaplan, H., Ed., Hedayat, K., Venna, N., Jones, P., and N.
Stratton, "An Extension to the Session Description Stratton, "An Extension to the Session Description
Protocol (SDP) and Real-time Transport Protocol (RTP) for Protocol (SDP) and Real-time Transport Protocol (RTP) for
Media Loopback", RFC 6849, DOI 10.17487/RFC6849, February Media Loopback", RFC 6849, DOI 10.17487/RFC6849, February
2013, <https://www.rfc-editor.org/info/rfc6849>. 2013, <https://www.rfc-editor.org/info/rfc6849>.
[RFC6871] Gilman, R., Even, R., and F. Andreasen, "Session [RFC6871] Gilman, R., Even, R., and F. Andreasen, "Session
Description Protocol (SDP) Media Capabilities Description Protocol (SDP) Media Capabilities
Negotiation", RFC 6871, DOI 10.17487/RFC6871, February Negotiation", RFC 6871, DOI 10.17487/RFC6871, February
2013, <https://www.rfc-editor.org/info/rfc6871>. 2013, <https://www.rfc-editor.org/info/rfc6871>.
[RFC6947] Boucadair, M., Kaplan, H., Gilman, R., and S. [RFC6947] Boucadair, M., Kaplan, H., Gilman, R., and S.
Veikkolainen, "The Session Description Protocol (SDP) Veikkolainen, "The Session Description Protocol (SDP)
Alternate Connectivity (ALTC) Attribute", RFC 6947, Alternate Connectivity (ALTC) Attribute", RFC 6947,
DOI 10.17487/RFC6947, May 2013, <https://www.rfc- DOI 10.17487/RFC6947, May 2013,
editor.org/info/rfc6947>. <https://www.rfc-editor.org/info/rfc6947>.
[RFC7006] Garcia-Martin, M., Veikkolainen, S., and R. Gilman, [RFC7006] Garcia-Martin, M., Veikkolainen, S., and R. Gilman,
"Miscellaneous Capabilities Negotiation in the Session "Miscellaneous Capabilities Negotiation in the Session
Description Protocol (SDP)", RFC 7006, Description Protocol (SDP)", RFC 7006,
DOI 10.17487/RFC7006, September 2013, <https://www.rfc- DOI 10.17487/RFC7006, September 2013,
editor.org/info/rfc7006>. <https://www.rfc-editor.org/info/rfc7006>.
[RFC7104] Begen, A., Cai, Y., and H. Ou, "Duplication Grouping [RFC7104] Begen, A., Cai, Y., and H. Ou, "Duplication Grouping
Semantics in the Session Description Protocol", RFC 7104, Semantics in the Session Description Protocol", RFC 7104,
DOI 10.17487/RFC7104, January 2014, <https://www.rfc- DOI 10.17487/RFC7104, January 2014,
editor.org/info/rfc7104>. <https://www.rfc-editor.org/info/rfc7104>.
[RFC7195] Garcia-Martin, M. and S. Veikkolainen, "Session [RFC7195] Garcia-Martin, M. and S. Veikkolainen, "Session
Description Protocol (SDP) Extension for Setting Audio and Description Protocol (SDP) Extension for Setting Audio and
Video Media Streams over Circuit-Switched Bearers in the Video Media Streams over Circuit-Switched Bearers in the
Public Switched Telephone Network (PSTN)", RFC 7195, Public Switched Telephone Network (PSTN)", RFC 7195,
DOI 10.17487/RFC7195, May 2014, <https://www.rfc- DOI 10.17487/RFC7195, May 2014,
editor.org/info/rfc7195>. <https://www.rfc-editor.org/info/rfc7195>.
[RFC7197] Begen, A., Cai, Y., and H. Ou, "Duplication Delay [RFC7197] Begen, A., Cai, Y., and H. Ou, "Duplication Delay
Attribute in the Session Description Protocol", RFC 7197, Attribute in the Session Description Protocol", RFC 7197,
DOI 10.17487/RFC7197, April 2014, <https://www.rfc- DOI 10.17487/RFC7197, April 2014,
editor.org/info/rfc7197>. <https://www.rfc-editor.org/info/rfc7197>.
[RFC7266] Clark, A., Wu, Q., Schott, R., and G. Zorn, "RTP Control [RFC7266] Clark, A., Wu, Q., Schott, R., and G. Zorn, "RTP Control
Protocol (RTCP) Extended Report (XR) Blocks for Mean Protocol (RTCP) Extended Report (XR) Blocks for Mean
Opinion Score (MOS) Metric Reporting", RFC 7266, Opinion Score (MOS) Metric Reporting", RFC 7266,
DOI 10.17487/RFC7266, June 2014, <https://www.rfc- DOI 10.17487/RFC7266, June 2014,
editor.org/info/rfc7266>. <https://www.rfc-editor.org/info/rfc7266>.
[RFC7272] van Brandenburg, R., Stokking, H., van Deventer, O., [RFC7272] van Brandenburg, R., Stokking, H., van Deventer, O.,
Boronat, F., Montagud, M., and K. Gross, "Inter- Boronat, F., Montagud, M., and K. Gross, "Inter-
Destination Media Synchronization (IDMS) Using the RTP Destination Media Synchronization (IDMS) Using the RTP
Control Protocol (RTCP)", RFC 7272, DOI 10.17487/RFC7272, Control Protocol (RTCP)", RFC 7272, DOI 10.17487/RFC7272,
June 2014, <https://www.rfc-editor.org/info/rfc7272>. June 2014, <https://www.rfc-editor.org/info/rfc7272>.
[RFC7273] Williams, A., Gross, K., van Brandenburg, R., and H. [RFC7273] Williams, A., Gross, K., van Brandenburg, R., and H.
Stokking, "RTP Clock Source Signalling", RFC 7273, Stokking, "RTP Clock Source Signalling", RFC 7273,
DOI 10.17487/RFC7273, June 2014, <https://www.rfc- DOI 10.17487/RFC7273, June 2014,
editor.org/info/rfc7273>. <https://www.rfc-editor.org/info/rfc7273>.
[RFC7657] Black, D., Ed. and P. Jones, "Differentiated Services [RFC7657] Black, D., Ed. and P. Jones, "Differentiated Services
(Diffserv) and Real-Time Communication", RFC 7657, (Diffserv) and Real-Time Communication", RFC 7657,
DOI 10.17487/RFC7657, November 2015, <https://www.rfc- DOI 10.17487/RFC7657, November 2015,
editor.org/info/rfc7657>. <https://www.rfc-editor.org/info/rfc7657>.
[T.38] "Procedures for real-time Group 3 facsimile communication [T.38] "Procedures for real-time Group 3 facsimile communication
over IP networks", <http://www.itu.int/rec/T-REC-T.38/e>. over IP networks", <http://www.itu.int/rec/T-REC-T.38/e>.
Author's Address Author's Address
Suhas Nandakumar Suhas Nandakumar
Cisco Cisco
170 West Tasman Drive 170 West Tasman Drive
San Jose, CA 95134 San Jose, CA 95134
USA USA
Email: snandaku@cisco.com Email: snandaku@cisco.com
 End of changes. 63 change blocks. 
169 lines changed or deleted 165 lines changed or added

This html diff was produced by rfcdiff 1.48. The latest version is available from http://tools.ietf.org/tools/rfcdiff/