Thing-to-Thing Data Hub
draft-hartke-t2trg-data-hub-05

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Thing-to-Thing Research Group                                  K. Hartke
Internet-Draft                                                  Ericsson
Intended status: Experimental                           November 4, 2019
Expires: May 7, 2020

                        Thing-to-Thing Data Hub
                     draft-hartke-t2trg-data-hub-05

Abstract

   A "Thing-to-Thing Data Hub" is a RESTful, hypermedia-driven Web
   application that can be used in Thing-to-Thing communications to
   share data items such as thing descriptions, configurations, resource
   descriptions, or firmware updates at a central location.

Status of This Memo

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   This Internet-Draft will expire on May 7, 2020.

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Hartke                     Expires May 7, 2020                  [Page 1]
Internet-Draft           Thing-to-Thing Data Hub           November 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   4
   2.  Data Hubs . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Data Items  . . . . . . . . . . . . . . . . . . . . . . .   4
       2.1.1.  Data Item Representation  . . . . . . . . . . . . . .   4
     2.2.  Data Collections  . . . . . . . . . . . . . . . . . . . .   4
       2.2.1.  Data Collection Representation  . . . . . . . . . . .   5
       2.2.2.  Filter Query Representation . . . . . . . . . . . . .   5
     2.3.  Data Hub Discovery  . . . . . . . . . . . . . . . . . . .   5
     2.4.  Interactions  . . . . . . . . . . . . . . . . . . . . . .   6
       2.4.1.  Getting All Data Items  . . . . . . . . . . . . . . .   6
       2.4.2.  Getting Data Items by Metadata  . . . . . . . . . . .   6
       2.4.3.  Creating a Data Item  . . . . . . . . . . . . . . . .   6
       2.4.4.  Reading a Data Item . . . . . . . . . . . . . . . . .   7
       2.4.5.  Observing a Data Item . . . . . . . . . . . . . . . .   7
       2.4.6.  Updating a Data Item  . . . . . . . . . . . . . . . .   7
       2.4.7.  Deleting a Data Item  . . . . . . . . . . . . . . . .   7
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     5.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  10
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   In Thing-to-Thing communication, there is often a need to share data
   items of common interest through a central location.  For example,
   the Resource Directory [I-D.ietf-core-resource-directory] aggregates
   descriptions of Web resources held on constrained nodes, which
   enables other nodes to easily discover these resources; a Thing
   Directory [W3C.CR-wot-architecture-20190516] stores metadata of IoT
   devices, allowing clients to discover interaction affordances and
   supported protocol bindings of Things; a Firmware Server
   [I-D.ietf-suit-architecture] stores firmware images and manifests,
   making this data available to deployed devices, commissioning tools,
   and other services.

   As more and more Thing-to-Thing applications are implemented, it
   becomes increasingly important being able to not only share resource
   descriptions and firmware updates but also many other kinds of data,
   such as default configurations for new devices, service locations, or
   certificate revocation lists.  Resource directories and firmware