[PPT] - Bringing Web Services to IoTivity Opportunities, Challenges & PowerPoint Presentation

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Bringing Web Services to IoTivity

Opportunities, Challenges & Approaches

Sanjeev BA Open Source Group Samsung Electronics

SLIDE 2

Background

Vertical Domains (Health, Manufacturing, Education, Consumer) Consumer Services Enterprise Services REST API SOAP based JSON XML

Cloud Solutions

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Opportunities

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IoT & The App Conundrum

Developers looking for niche areas
Direct revenues from apps slowing down
52% make < $1000 / month
53% working on IoT related apps already.
Estimated 5.5 Million mobile app devs.
Smart Home and Wearables
Users already have app fatigue

* Source : VisionMobile™ Developer Economics Q1 2015: State of the Developer Nation

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Critical Contextual

Healthcare Service User Context Location + Time

Consumer Centric

Smart Home + Retail

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Critical

Legacy system integration
Regulatory

Contextual

Sensor + service integration

Enriched Consumer Experience

Smart Shopping Cart
Tap device to order

Services in the IoT Context

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Challenges

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SDK Overload for Developers

Developer. Tizen.org Developer. android.com Developer. apple.com developers.facebook .com developer.paypal. com dev.twitter.com Iotivity SDK AllJoyn SDK MQTT SDK

App Developers ( Ex. Streaming Music)

Platform SDK Web Service SDK IoT SDK

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Siloed Ecosystems

THING MAKERS ARE LOOKING TO DIFFERENTIATE WITH THE HELP OF WEB SERVICES

Store 1 Store 2 Store 3

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App Overload For Users

Smart Things Flipkart Sonos Sphero Path Twitter Skype Hue

User

!=

Service Integrator

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Current Approaches

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Dedicated Hub + Cloud Service Model

Cloud Service

IoT Network

App

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Service Plugin Model

Cloud Service Web Service Plugin Web Service Profile Package Download Server

IoT Network

App

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Distributed App Control Model

Service Integrator Backend

App

IoT Network

Distributed App Control

App

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Web Service Interface

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Web Service Interface (WSI)

Enabler of interactions
IoTivity applications & Web Services
Web service abstraction

IoTivity Web Service Interface Web Services RESTful Services

IoTivity Device IoTivity Device

Service Access Auth Handling

App

SOAP Base Services

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Key Concepts

Roles
Web Service Provider
WSI
IoT Device Manufacturer
IoT App Developer
Users
Service Description
Services
Capabilities
Authentication and Authorization

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Roles

Users Web Service Provider Application Developer Device Manufacturers

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Service Description

What is service description
A way to represent web services to WSI
Service Block (JSON)
Metadata
Authorization
Capability List
TAGS

Service Description WSI

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Service Block Example

"name":“Openweathermap", "id":“org.openweathermap", "description":“A service that has weather for more than 200,000 cities", “logo" : "http://openweathermap.org/images/OWM_logo32_32.png"

META DATA

capabilities:[ {Capability1: }, {Capability2: }, … {CapabilityN: } ]

CAPABILITY LIST

"tags":[ "search", “weather” ]

Capability

What is a capability
Represents different API offered by the Service
Capability Block (JSON)
Metadata block
Headers
Responses
TAGS

Service Description WSI Post Tweet Now Trending Timeline Status

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Capability Example

capability:[ { id : org.openweathermap.findbycity, isauthrequired : true, endpoint : api.openweathermap.org/data/2.5/weather endpointtype : REST,

peration

: GET, params :{ q : {{cityname}} }, headers :{ x-custom : {{cityname}} }, response :{ <response JSON body format> }

CAPABILITY DESCRIPTION

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Authorization Example

auth:{ type :oauth2.0, subtype :application-only, appcredentials: { cust_key :{{cust_key}} cust_sec :{{cust_secret}}

auth_key

:{{oauth_key}}

auth_sec

:{{oauth_secret}} } }

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Applying Service Description

A Use Case

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Use Case #1: Web Service + IoT Device

Brew my coffee based

n weather

Thin Device

Weather Service

Alarm Event WSI Web Service IoT Device IoT App

IoT Alarm App

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Smart Phone with WSI Initialization

Use Case #1

Open WeatherMap WSI

RESTful endpoint

nObserve()

IoTivity Coffee Maker

bServeResource()

JSON Response

Service Description (Offline / Download)

Smart Alarm App (w/ IoTivity)

WSI_Capability_Request

(“Weather”, “Time”, “Location”) WSI_Connect()

App Logic Hot Cappuccino Result From Service Description Find List of Providers : Tag = Weather

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Smart Phone with WSI Initialization

Use Case #1 : Adding Service Provider

Accuweather WSI

RESTful endpoint

nObserve()

IoTivity Coffee Maker

bServeResource()

JSON Response

Service Description (Offline / Download)

Smart Alarm App (w/ IoTivity)

WSI_Capability_Request

(“Weather”, “Time”, “Location”) WSI_Connect()

App Logic Hot Cappuccino Result from Service Description Find List of Providers : Tag = Weather

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Use Case #2 : Share with friends

Coffee recipe Thin Device Sharing Service

IoT Alarm App

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Smart Phone with WSI Configuration Phase

Use Case #2 : Tweet The Recipe

Twitter WSI Post Recipe to Twitter IoTivity Coffee Maker IoT Alarm App “Share” To Twitter Hot Cappuccino With Cream Recipe

Check Service Description & local cache

Twitter Auth Flow Update AuthCache Report Status Cust Key + Secret {MSG} User Auth If required

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Putting it all together

Web Services Interface

Platform Adaptation Linux Android Web

WSI API Interface Web Services Manager Service Handler Config & Caching Auth Manager WSI Daemon / Service

Tizen

WSI Configuration App

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Web Service Interface Daemon

Web Services Manager
Parses the service description
Provides representation of the description
Service Handler
Invokes requested API
Processes the response
Uses Auth Manager to delegate Auth flows.
Uses platform HTTP stack
Auth Manager
Performs Auth related flows
Manages application specific auth cache.
Token Refresh Handling
Config & Caching

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WSI API Interface

Provides a simple set of API to discover and utilize services
API overview
WSI_Connect() Connect to the WSI Daemon / Service Application
List<Service> WSI_Get_Services(“User Action Tag”)
List<Capability> WSI_Get_Capabilities(Service)
Request_Handle WSI_Capability_Request(Capability, Callback)
Callback(Request_Handle, Capability_Result)

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Configuration App

Provides frontend for users to configure web

services.

Enabling and disabling individual capabilities
Helps with Auth flows involving a browser.

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Deployment View : Linux, Tizen Web Service Interface

Service Description

Send Tweet Get Sentiment

IoTivity Application

WebService Manager

IoTivity Network

IoTivity SDK (C++) Auth Cache WSI C++ Library WSI DBus Or Service App

Web Service

WSI Config App

WSI C++ Library

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Deployment View : Android Web Service Interface

Service Description

Send Tweet Get Sentiment

IoTivity Application

WebService Manager

IoTivity Network

IoTivity SDK (Android) Auth Cache WSI Android Library WSI Android Service

Web Service

WSI Config App

WSI Android Library

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Challenges Addressed By WSI

App Overload ? SDK Overload ? Siloed Ecosystems ? Enable Web Services Integration?

Developer. Tizen.org Developer. android.co m Developer. apple.com developers.f acebook.co m developer.p aypal. com dev.t w itter. com Iot ivity SDK AllJoy n SDK M QTT SDK App Developers ( Ex. Streaming Music) P l a t f

r

m S D K W eb Service SDK I

T

S D K S m a r t T h i n g s F l i p k a r t S

n
s

S p h e r

P

a t h T w i t t e r S k y p e H u e Store 1 Store 2 Store 3 H e a l t h c a r e S e r v i c e U ser Cont ext Locat ion + Time Smart Home + Ret ail

Partial No OIC & IoTivity Yes

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Development Plan & Status

Phase 1 (Oct ‘15)
Schema definitions for popular services
Schema Parsing, Data models
Demo Web Service Use Cases
Linux, Android and Tizen support
Phase 2 (Nov ‘15)
Schema improvement (new features)
Multiuser support

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Demo

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