Thing-to-Thing Data Hub
draft-hartke-t2trg-data-hub-01

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Thing-to-Thing Research Group                                  K. Hartke
Internet-Draft                                   Universitaet Bremen TZI
Intended status: Experimental                              March 2, 2018
Expires: September 3, 2018

                        Thing-to-Thing Data Hub
                     draft-hartke-t2trg-data-hub-01

Abstract

   The Thing-to-Thing Data Hub is a RESTful, hypermedia-driven Web
   application that can be used in Thing-to-Thing communication 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 September 3, 2018.

Copyright Notice

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Notation . . . . . . . . . . . . . . . . . .   3
   2.  Data Model  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Interaction Model . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Related Work . . . . . . . . . . . . . . . . . . . .   8
     A.1.  CoAP Publish-Subscribe  . . . . . . . . . . . . . . . . .   8
     A.2.  CoRE Resource Directory . . . . . . . . . . . . . . . . .   9
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   In Thing-to-Thing communication, there is often a need to share data
   items of common interest at a central location.  For example, the
   CoRE Resource Directory [I-D.ietf-core-resource-directory] aggregates
   descriptions of resources held on other servers, which enables things
   to easily discover these resources.  Similarly, a W3C Web-of-Things
   Thing Description Repository [WOT] stores semantic metadata of things
   as well as functional descriptions of their interfaces, making this
   data available to Web dashboards, commissioning tools and other
   things.

   As more and more thing-to-thing applications are implemented, it
   becomes increasingly important to be able to share not only resource
   and thing descriptions but also many other kinds of data, such as
   default configurations for new devices, service locations, firmware
   updates, or certificate revocation lists.  The existing resource
   directories and thing description repositories are not a good fit for
   these kinds of data, as they're specialized to their use case and
   don't accept other kinds of data.  And defining a new specialized
   application for each use case is not practical in the long term.

   This document defines a simple "data hub" application, a RESTful Web
   application with a hypermedia API that is suitable for constrained
   environments and that generalizes the concept of a central repository
   for sharing any kinds of data.  A data hub enables clients to share
   data items in any format and provides means for creating, reading,
   observing, updating, deleting and finding data items at a data hub
   server.

   Data hubs are intended to be used primarily with CoAP [RFC7252].

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