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Re: [wot-f2f] minutes from Prep. Day - 10 April 2016

From: Kazuyuki Ashimura <ashimura@w3.org>
Date: Tue, 12 Apr 2016 20:28:31 +0900
Message-ID: <CAJ8iq9W+=iWykAL5jtVou4mEvgGi9KdNx3110T2EvUgSSrtS-g@mail.gmail.com>
To: Public Web of Things IG <public-wot-ig@w3.org>
Sorry but it seems there was some confusion with RRSAgent tool.

So I've just renamed the minutes from Prep Day to:
  https://www.w3.org/2016/04/10-wot-minutes.html

Text version re-attached below.

Sorry,

Kazuyuki

---
   [1]W3C

      [1] http://www.w3.org/

                               - DRAFT -

                        Plugfest Preparation Day

10 Apr 2016

Attendees

   Present
          Kaz_Ashimura(W3C), Louay_Bassbouss(Fraunhofer_FOKUS),
          Dave_Raggett(W3C), Joerg_Heuer(Siemens),
          Kazuo_Kajimoto(Panasonic), Johannes_Hund(Siemens),
          Sebastian_Kaebisch(Siemens), Daniel_Peinter(Siemens),
          Taki_Kamiya(Fujitsu), Victor_Charpenay(Siemens),
          Michael_Koster(SmartThings/Samsung),
          Matthias_Kovatsch(Siemens), Yingying_Chen(W3C),
          Karen_Myers(W3C), Ryuichi_Matsukura(Fujitsu),
          Katsuyoshi_Naka(Panasonic)

   Regrets
   Chair
          Sebastian

   Scribe
          kaz

Contents

     * [2]Topics
         1. [3]Introduction of each plugfest demo
     * [4]Summary of Action Items
     __________________________________________________________

Introduction of each plugfest demo

   louay: discovery using UPnP

   kajimoto: no demo this time

   dsr: proxy for discovery

   michael: doing REST-based proxy

   dsr: the other thing to do is slides for tomorrow

   johannes: same thing as the previous demo
   ... UI to interact with TD
   ... several things on servients
   ... how to model things
   ... how to handle the processes
   ... some lifecycle method
   ... and how to interlink things
   ... thinking about having resources
   ... would investigate patterns

   michael: collection of patterns?

   johannes: yes
   ... also collection of multiple, e.g., 64, LEDs

   daniel: @@@

   taki: no demo

   victor: TD Repository:
   ... [5]http://vs0.inf.ethz.ch:8080
   ... coap://vs0.inf.ethz.ch:5687

      [5] http://vs0.inf.ethz.ch:8080/

   louay: shows FlowsAndBindings.md
   ...
   [6]https://github.com/w3c/wot/blob/master/TF-DI/DiscoveryFlowsA
   ndBindings.md
   ... several possible discovery flows
   ... discovery flow 1, 2, 3, 4, 5
   ... myself use flow 3
   ... flow 4 looks up endpoints
   ... flow 5 has TD generator
   ... there could be more patterns
   ... next how to bind concrete protocols
   ... the first is SSDP binding
   ... difine new SSDP device type
   ... Thing provider (server) advertises some specific SSDP
   message

      [6]
https://github.com/w3c/wot/blob/master/TF-DI/DiscoveryFlowsAndBindings.md

   s/message/messages when things appear/disappear

   scribe: mDNS proposed by Dave

   dsr: mDNS sends query using UDP
   ... binary data
   ... and links for early records
   ... "A" record for IPv4 address
   ... "AAAA" record for IPv6 address

   johannes: do we have any starting points for documentation?

   dsr: no, not yet

   johannes: need to think about broadcasting?

   dsr: mDNS is build on DNS

   johannes: would be handy if we could document concrete examples
   ... the question is we need guidance for developers

   louay: this .md file is the basis of the possible guideline
   ... [7]https://github.com/fraunhoferfokus/wot-cli
   ... setup: install Node.js, clone the repository, install
   dependencies
   ... usage: wot [options] [command]
   ... wot discover
   ... wot advertise

      [7] https://github.com/fraunhoferfokus/wot-cli

   sebastian: work for local network?

   louay: yes
   ... and we'll discover all the things within the local network
   ... possible to use QUERY to search specific Things

   daniel: @@d

   louay: what you're asking is rather similar to the discovery
   flow 4
   ... advertise(Lookup-Endpoint)

   daniel: would get same results regardless of the protocols

   louay: would start with SSDP binding
   ... shows "TD.WOT.W3C.ORG: URL to Thing Description"

   dsr: how about multicast?

   sebstian: another question
   ... always announce Thing Description?
   ... how Bonjour and mDNS work

   daniel: UPnP is gone, isn't it?

   matthias: implementations for various OSs?

   dsr: mDNS is quite simple

   louay: s/SSDP/SSDP/

   s|s/mDNS/SSDP/|there are libraries|

   scribe: TVs use UPnP for discovery with DLNA

   dsr: quick introduction for mDNS
   ... UDP and multicast
   ... IANA repository for service name
   ... shows Bonjour Browser
   ... can use a command line tool, dns-sd
   ... give service name using -R option
   ... shows /dev/cu.wchusbserial1420 log
   ... default network arrangement
   ... shows Transport.cpp
   ... log again
   ... easy to advertise endpoints

   michael: diagram with 2 stages
   ... how about implementations?

   dsr: there are many implementations

   louay: registration is not part of work currently
   ... do we really need "RN:"?

   dsr: need to specify which protocol(s) the endpoint can talk
   ... devices may sleep

   daniel: also network traffic issue

   sebastian: would see interaction with SSDP as well

   (discussion on multiple protocols)

   louay: important to specify USN (unique service name), e.g.,
   advertisement UUID
   ... specify both service name and protocol
   ... wot search command has -p option to specify proptocols
   ... currently supports only ssdp and mdns, though

   joerg: do we think it would be relevant for the next plugfest?
   ... who are interested?

   louay: would make sense to have multiple gateways for different
   protocols

   joerg: asking because we need to be clear what is expected for
   plugfest
   ... wondering how to deal with the categories
   ... we need to agree with what to do
   ... and decide who to do what

   dsr: what kind of network to be used
   ... secure or not

   johannes: for Nice meeting, eventually somebody brought a
   router and everybody used that

   dsr: we can prepare what is needed
   ... July meeting will be held at some hotel?

   johannes: if we can prepare beforehand, it would be better
   ... would be better to get prepared before we fly

   louay: shows description.jsonld
   ... and scpd.xml
   ... and shows a demo which plays a video
   ... and show Node-RED diagram

   johannes: relationship between Node-RED and TD?

   louay: added thing as a node

   johannes: how to translate UPnP to actions?

   louay: if you want to use TD directly you can use URI and
   actions

   johannes: you have same issues on actions vs properties

   (Node-RED is useful to express the bindings between multiple
   protocols)

   louay: we can start with concrete Thing Description which is
   tied to some device
   ... or we can start with "discover things"
   ... connect multiple things using Node-RED tool

   kaz: here "thing" node is a wot servient as TD processor rather
   than concrete device. right

   louay: right

   [ adjourned ]

Summary of Action Items

   [End of minutes]
     __________________________________________________________


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Received on Tuesday, 12 April 2016 11:29:44 UTC

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