CoRE Resource Directory
draft-ietf-core-resource-directory-23

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CoRE                                                           Z. Shelby
Internet-Draft                                                       ARM
Intended status: Standards Track                               M. Koster
Expires: January 9, 2020                                     SmartThings
                                                              C. Bormann
                                                 Universitaet Bremen TZI
                                                         P. van der Stok
                                                              consultant
                                                         C. Amsuess, Ed.
                                                           July 08, 2019

                        CoRE Resource Directory
                 draft-ietf-core-resource-directory-23

Abstract

   In many IoT applications, direct discovery of resources is not
   practical due to sleeping nodes, disperse networks, or networks where
   multicast traffic is inefficient.  These problems can be solved by
   employing an entity called a Resource Directory (RD), which contains
   information about resources held on other servers, allowing lookups
   to be performed for those resources.  The input to an RD is composed
   of links and the output is composed of links constructed from the
   information stored in the RD.  This document specifies the web
   interfaces that a Resource Directory supports for web servers to
   discover the RD and to register, maintain, lookup and remove
   information on resources.  Furthermore, new target attributes useful
   in conjunction with an RD are defined.

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 January 9, 2020.

Shelby, et al.           Expires January 9, 2020                [Page 1]
Internet-Draft           CoRE Resource Directory               July 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
   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 . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Architecture and Use Cases  . . . . . . . . . . . . . . . . .   6
     3.1.  Principles  . . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  Architecture  . . . . . . . . . . . . . . . . . . . . . .   7
     3.3.  RD Content Model  . . . . . . . . . . . . . . . . . . . .   8
     3.4.  Link-local addresses and zone identifiers . . . . . . . .  12
     3.5.  Use Case: Cellular M2M  . . . . . . . . . . . . . . . . .  12
     3.6.  Use Case: Home and Building Automation  . . . . . . . . .  13
     3.7.  Use Case: Link Catalogues . . . . . . . . . . . . . . . .  14
   4.  RD discovery and other interface-independent components . . .  14
     4.1.  Finding a Resource Directory  . . . . . . . . . . . . . .  15
       4.1.1.  Resource Directory Address Option (RDAO)  . . . . . .  17
     4.2.  Payload Content Formats . . . . . . . . . . . . . . . . .  18
     4.3.  URI Discovery . . . . . . . . . . . . . . . . . . . . . .  19
   5.  Registration  . . . . . . . . . . . . . . . . . . . . . . . .  21
     5.1.  Simple Registration . . . . . . . . . . . . . . . . . . .  26
     5.2.  Third-party registration  . . . . . . . . . . . . . . . .  28
     5.3.  Operations on the Registration Resource . . . . . . . . .  29
       5.3.1.  Registration Update . . . . . . . . . . . . . . . . .  29
       5.3.2.  Registration Removal  . . . . . . . . . . . . . . . .  32
       5.3.3.  Further operations  . . . . . . . . . . . . . . . . .  33
   6.  RD Lookup . . . . . . . . . . . . . . . . . . . . . . . . . .  33
     6.1.  Resource lookup . . . . . . . . . . . . . . . . . . . . .  34
     6.2.  Lookup filtering  . . . . . . . . . . . . . . . . . . . .  34