Negotiating Human Language in Real-Time Communications
draft-ietf-slim-negotiating-human-language-17
Network Working Group R. Gellens
Internet-Draft Core Technology Consulting
Intended status: Standards Track October 14, 2017
Expires: April 17, 2018
Negotiating Human Language in Real-Time Communications
draft-ietf-slim-negotiating-human-language-17
Abstract
Users have various human (natural) language needs, abilities, and
preferences regarding spoken, written, and signed languages. This
document adds new SDP media-level attributes so that when
establishing interactive communication sessions ("calls"), it is
possible to negotiate (communicate and match) the caller's language
and media needs with the capabilities of the called party. This is
especially important with emergency calls, where a call can be
handled by a call taker capable of communicating with the user, or a
translator or relay operator can be bridged into the call during
setup, but this applies to non-emergency calls as well (as an
example, when calling a company call center).
This document describes the need and a solution using new SDP media
attributes.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
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time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on April 17, 2018.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
Gellens Expires April 17, 2018 [Page 1]
Internet-Draft Negotiating Human Language October 2017
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Applicability . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Desired Semantics . . . . . . . . . . . . . . . . . . . . . . 5
4. The existing 'lang' attribute . . . . . . . . . . . . . . . . 5
5. Solution . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.1. Rationale . . . . . . . . . . . . . . . . . . . . . . . . 5
5.2. The 'hlang-send' and 'hlang-recv' attributes . . . . . . 6
5.3. No Language in Common . . . . . . . . . . . . . . . . . . 7
5.4. Undefined Combinations . . . . . . . . . . . . . . . . . 7
5.5. Examples . . . . . . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
6.1. att-field Table in SDP Parameters . . . . . . . . . . . . 10
6.2. Warn-Codes Sub-Registry of SIP Parameters . . . . . . . . 11
7. Security Considerations . . . . . . . . . . . . . . . . . . . 11
8. Privacy Considerations . . . . . . . . . . . . . . . . . . . 11
9. Changes from Previous Versions . . . . . . . . . . . . . . . 11
9.1. Changes from draft-ietf-slim-...-04 to draft-ietf-
slim-...-06 . . . . . . . . . . . . . . . . . . . . . . . 11
9.2. Changes from draft-ietf-slim-...-02 to draft-ietf-
slim-...-03 . . . . . . . . . . . . . . . . . . . . . . . 12
9.3. Changes from draft-ietf-slim-...-01 to draft-ietf-
slim-...-02 . . . . . . . . . . . . . . . . . . . . . . . 12
9.4. Changes from draft-ietf-slim-...-00 to draft-ietf-
slim-...-01 . . . . . . . . . . . . . . . . . . . . . . . 12
9.5. Changes from draft-gellens-slim-...-03 to draft-ietf-
slim-...-00 . . . . . . . . . . . . . . . . . . . . . . . 12
9.6. Changes from draft-gellens-slim-...-02 to draft-gellens-
slim-...-03 . . . . . . . . . . . . . . . . . . . . . . . 12
9.7. Changes from draft-gellens-slim-...-01 to draft-gellens-
slim-...-02 . . . . . . . . . . . . . . . . . . . . . . . 13
9.8. Changes from draft-gellens-slim-...-00 to draft-gellens-
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