Protocol for Controlling Multiple Streams for Telepresence (CLUE)
draft-ietf-clue-protocol-19
CLUE Working Group R. Presta
Internet-Draft S. P. Romano
Intended status: Experimental University of Napoli
Expires: January 6, 2020 July 5, 2019
Protocol for Controlling Multiple Streams for Telepresence (CLUE)
draft-ietf-clue-protocol-19
Abstract
The CLUE protocol is an application protocol conceived for the
description and negotiation of a telepresence session. The design of
the CLUE protocol takes into account the requirements and the
framework defined within the IETF CLUE working group. A companion
document delves into CLUE signaling details, as well as on the SIP/
SDP session establishment phase. CLUE messages flow over the CLUE
data channel, based on reliable and ordered SCTP over DTLS transport.
Message details, together with the behavior of CLUE Participants
acting as Media Providers and/or Media Consumers, are herein
discussed.
Status of This Memo
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This Internet-Draft will expire on January 6, 2020.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Overview of the CLUE protocol . . . . . . . . . . . . . . . . 4
5. Protocol messages . . . . . . . . . . . . . . . . . . . . . . 7
5.1. options . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2. optionsResponse . . . . . . . . . . . . . . . . . . . . . 11
5.3. advertisement . . . . . . . . . . . . . . . . . . . . . . 12
5.4. ack . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.5. configure . . . . . . . . . . . . . . . . . . . . . . . . 14
5.6. configureResponse . . . . . . . . . . . . . . . . . . . . 15
5.7. Response codes and reason strings . . . . . . . . . . . . 16
6. Protocol state machines . . . . . . . . . . . . . . . . . . . 18
6.1. Media Provider's state machine . . . . . . . . . . . . . 21
6.2. Media Consumer's state machine . . . . . . . . . . . . . 22
7. Versioning . . . . . . . . . . . . . . . . . . . . . . . . . 25
8. Extensions . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.1. Extension example . . . . . . . . . . . . . . . . . . . . 27
9. XML Schema . . . . . . . . . . . . . . . . . . . . . . . . . 29
10. Call flow example . . . . . . . . . . . . . . . . . . . . . . 34
10.1. CLUE message nr. 1: 'options' . . . . . . . . . . . . . 37
10.2. CLUE message nr. 2: 'optionsResponse' . . . . . . . . . 39
10.3. CLUE message nr. 3: 'advertisement' . . . . . . . . . . 39
10.4. CLUE message nr. 4: 'configure + ack' . . . . . . . . . 47
10.5. CLUE message nr. 5: 'confResponse' . . . . . . . . . . . 47
10.6. CLUE message nr. 6: 'advertisement' . . . . . . . . . . 48
10.7. CLUE message nr. 7: 'ack' . . . . . . . . . . . . . . . 58
10.8. CLUE message nr. 8: 'configure' . . . . . . . . . . . . 58
10.9. CLUE message nr. 9: 'confResponse' . . . . . . . . . . . 59
11. Security Considerations . . . . . . . . . . . . . . . . . . . 60
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 61
12.1. URN Sub-Namespace Registration . . . . . . . . . . . . . 61
12.2. XML Schema registration . . . . . . . . . . . . . . . . 62
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