Interoperability Profile for Relay User Equipment
draft-ietf-rum-rue-01

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00
• 01

rum                                                             B. Rosen
Internet-Draft                                           4 November 2019
Intended status: Standards Track                                        
Expires: 7 May 2020

           Interoperability Profile for Relay User Equipment
                         draft-ietf-rum-rue-01

Abstract

   Video Relay Service (VRS) is a term used to describe a method by
   which a hearing persons can communicate with deaf/Hard of Hearing
   user using an interpreter ("Communications Assistant") connected via
   a videophone to the deaf/HoH user and an audio telephone call to the
   hearing user.  The CA interprets using sign language on the
   videophone link and voice on the telephone link.  Often the
   interpreters may be supplied by a company or agency termed a
   "provider" in this document.  The provider also provides a video
   service that allows users to connect video devices to their service,
   and subsequently to CAs and other dead/HoH users.  It is desirable
   that the videophones used by the deaf/HoH/H-I user conform to a
   standard so that any device may be used with any provider and that
   video calls direct between deaf/HoH users work.  This document
   describes the interface between a videophone and a provider.

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 https://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 7 May 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Rosen                      Expires 7 May 2020                   [Page 1]
Internet-Draft        Relay User Equipment Profile         November 2019

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://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
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Requirements Language . . . . . . . . . . . . . . . . . . . .   5
   4.  General Requirements  . . . . . . . . . . . . . . . . . . . .   6
   5.  SIP Signaling . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Registration  . . . . . . . . . . . . . . . . . . . . . .   6
     5.2.  Session Establishment . . . . . . . . . . . . . . . . . .   8
       5.2.1.  Normal Call Origination . . . . . . . . . . . . . . .   8
       5.2.2.  One-Stage Dial-Around Origination . . . . . . . . . .   8
       5.2.3.  RUE Contact Information . . . . . . . . . . . . . . .  10
       5.2.4.  Incoming Calls  . . . . . . . . . . . . . . . . . . .  10
       5.2.5.  Emergency Calls . . . . . . . . . . . . . . . . . . .  10
     5.3.  Mid Call Signaling  . . . . . . . . . . . . . . . . . . .  11
     5.4.  URI Representation of Phone Numbers . . . . . . . . . . .  11
     5.5.  Transport . . . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Media . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  SRTP and SRTCP  . . . . . . . . . . . . . . . . . . . . .  12
     6.2.  Text-Based Communication  . . . . . . . . . . . . . . . .  12
     6.3.  Video . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.4.  Audio . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.5.  DTMF Digits . . . . . . . . . . . . . . . . . . . . . . .  13
     6.6.  Session Description Protocol  . . . . . . . . . . . . . .  13
     6.7.  Privacy . . . . . . . . . . . . . . . . . . . . . . . . .  13
     6.8.  Negative Acknowledgment, Packet Loss Indicator, and
           Full Intraframe Request Features  . . . . . . . . . . . .  13
   7.  Contacts  . . . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.1.  CardDAV Login and Synchronization . . . . . . . . . . . .  13
     7.2.  Contacts Import/Export Service  . . . . . . . . . . . . .  14
   8.  Mail Waiting Indicator (MWI)  . . . . . . . . . . . . . . . .  14