Negotiating Human Language in Real-Time Communications
draft-ietf-slim-negotiating-human-language-13

Document Type Active Internet-Draft (slim WG)
Last updated 2017-07-17
Replaces draft-gellens-negotiating-human-language, draft-gellens-slim-negotiating-human-language
Stream IETF
Intended RFC status Proposed Standard
Formats plain text xml pdf html bibtex
Reviews
Stream WG state WG Document
Document shepherd Bernard Aboba
Shepherd write-up Show (last changed 2017-02-03)
IESG IESG state AD is watching
Consensus Boilerplate Yes
Telechat date
Responsible AD Alexey Melnikov
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state None
Network Working Group                                         R. Gellens
Internet-Draft                                Core Technology Consulting
Intended status: Standards Track                           July 14, 2017
Expires: January 15, 2018

         Negotiating Human Language in Real-Time Communications
             draft-ietf-slim-negotiating-human-language-13

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 January 15, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Gellens                 Expires January 15, 2018                [Page 1]
Internet-Draft         Negotiating Human Language              July 2017

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

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  . . . . . . . . . . . . . . . . .   8
     5.5.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  att-field Table in SDP Parameters . . . . . . . . . . . .  10
     6.2.  Warn-Codes Sub-Registry of SIP Parameters . . . . . . . .  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  12
   9.  Changes from Previous Versions  . . . . . . . . . . . . . . .  12
     9.1.  Changes from draft-ietf-slim-...-04 to draft-ietf-
           slim-...-06 . . . . . . . . . . . . . . . . . . . . . . .  12
     9.2.  Changes from draft-ietf-slim-...-02 to draft-ietf-
           slim-...-03 . . . . . . . . . . . . . . . . . . . . . . .  13
     9.3.  Changes from draft-ietf-slim-...-01 to draft-ietf-
           slim-...-02 . . . . . . . . . . . . . . . . . . . . . . .  13
     9.4.  Changes from draft-ietf-slim-...-00 to draft-ietf-
           slim-...-01 . . . . . . . . . . . . . . . . . . . . . . .  13
     9.5.  Changes from draft-gellens-slim-...-03 to draft-ietf-
           slim-...-00 . . . . . . . . . . . . . . . . . . . . . . .  13
     9.6.  Changes from draft-gellens-slim-...-02 to draft-gellens-
           slim-...-03 . . . . . . . . . . . . . . . . . . . . . . .  13
Show full document text