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

Document Type Active Internet-Draft (rum WG)
Last updated 2019-11-04
Replaces draft-rosen-rue
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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.

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   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

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   Please review these documents carefully, as they describe your rights
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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
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