Interoperability Profile for Relay User Equipment
draft-rosen-rue-00

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Last updated 2019-02-01
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Internet Engineering Task Force                                 B. Rosen
Internet-Draft
Intended status: Standards Track                               J. Malloy
Expires: August 5, 2019                                     B. Henderson
                                                   The MITRE Corporation
                                                        February 1, 2019

           Interoperability Profile for Relay User Equipment
                           draft-rosen-rue-00

Abstract

   This document identifies a minimum set of standards and requirements
   that must be supported by a Video Relay Service (VRS) Video Access
   Technology Reference Platform (VATRP)-compliant client and United
   States Telecommunications Relay Service providers required to be
   VATRP compliant.  This Relay User Equipment specification only
   specifies a minimum set of requirements.  It does not prohibit VRS
   providers or endpoint developers from developing or deploying
   additional capabilities, provided that doing so will not prevent
   compliance with the requirements specified here.

Status of This Memo

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   This Internet-Draft will expire on August 5, 2019.

Copyright Notice

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

   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

Rosen, et al.            Expires August 5, 2019                 [Page 1]
Internet-Draft        Relay User Equipment Profile         February 2019

   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.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Requirements Language . . . . . . . . . . . . . . . . . . . .   6
   5.  General Requirements  . . . . . . . . . . . . . . . . . . . .   6
   6.  SIP Signaling . . . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  Registration  . . . . . . . . . . . . . . . . . . . . . .   7
     6.2.  Session Establishment . . . . . . . . . . . . . . . . . .   8
       6.2.1.  Normal Call Origination . . . . . . . . . . . . . . .   8
       6.2.2.  One-Stage Dial-Around Origination . . . . . . . . . .   9
       6.2.3.  RUE Contact Information . . . . . . . . . . . . . . .  10
       6.2.4.  Incoming Calls  . . . . . . . . . . . . . . . . . . .  10
       6.2.5.  Emergency Calls . . . . . . . . . . . . . . . . . . .  11
     6.3.  Mid Call Signaling  . . . . . . . . . . . . . . . . . . .  11
     6.4.  URI Representation of Phone Numbers . . . . . . . . . . .  11
     6.5.  NAT Traversal . . . . . . . . . . . . . . . . . . . . . .  12
   7.  Media . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     7.1.  Text-Based Communication  . . . . . . . . . . . . . . . .  12
     7.2.  Video Codecs  . . . . . . . . . . . . . . . . . . . . . .  12
     7.3.  Audio Codecs  . . . . . . . . . . . . . . . . . . . . . .  13
     7.4.  DTMF Digits . . . . . . . . . . . . . . . . . . . . . . .  13
     7.5.  Session Description Protocol  . . . . . . . . . . . . . .  13
     7.6.  Privacy . . . . . . . . . . . . . . . . . . . . . . . . .  13
   8.  SRTP and SRTCP  . . . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  Bandwidth Negotiation Flow Control and Media Performance   13
     8.2.  SRTP / SAVPF Profile for SRTCP Feedback . . . . . . . . .  14
     8.3.  Negative Acknowledgment, Packet Loss Indicator, and Full
           Intraframe Request Features . . . . . . . . . . . . . . .  14
   9.  Contacts  . . . . . . . . . . . . . . . . . . . . . . . . . .  14
     9.1.  CardDAV Login and Synchronization . . . . . . . . . . . .  14
     9.2.  Contacts Import/Export Service  . . . . . . . . . . . . .  15
   10. Mail Waiting Indicator (MWI)  . . . . . . . . . . . . . . . .  15
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