the missing layer - virtualizing smart spaces€¦ · marc-oliver@pahl.de | the missing layer -...

Crowd-SourcingSmart Spaces today?Virtual State Layer

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The Missing Layer - Virtualizing Smart SpacesMarc-Oliver Pahl and Georg Carle

pahl@net.in.tum.de carle@net.in.tum.de

Technische Universität München

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces 2

4 Xyologic, USA market, August 2011 5 Xyologic, USA market, August 2011

Dev

ices

sol

d du

ring

qua

rter

(00

0’s) Apps available at end of quarter

Lots of developers produce lots of applications

Wouldn’t it be cool to have crowd-sourced development

for smart spaces too?

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

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3

Simple Development of Services4

1 Homogeneous API2 Portable Applications3 Dynamic Extensibility

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Research questions?

• How can a homogeneous API to heterogeneous devices in smart spaces look like?

• How can the portability (instance-comprehensive use) of applications be supported?

• How can dynamic extensibility be realized?

• How can the development of applications for smart spaces be supported to facilitate it?

4

2

4

1

3

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Services/ Applications

Gateways

Physical World

Sensors/ Actuators

5

Ontologies

? : ?

centralized orchestration

supported by gateways

abstraction via ontologies

What kind of support for software orchestration do we have today?

[11] Y.-D. Bromberg, P. Grace, L. Reveillere, and G. S. Blair, “Bridging the interoperability gap: overcoming combined ap- plication and middleware heterogeneity,” in Middleware’11: Proceedings of the 12th ACM/IFIP/USENIX international conference on Middleware. Springer-Verlag, Dec. 2011.

[9] C. Bettini, O. Brdiczka, K. Henricksen, J. Indulska, D. Nick- las, A. Ranganathan, and D. Riboni, “A survey of context modelling and reasoning techniques,” Pervasive and Mobile Computing, vol. 6, no. 2, pp. 161–180, Apr. 2010.

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Dyn. Extensibility

App Portability

Service Simplicity

API Homogeneity

centralized orchestration supported by gateways abstraction

via ontologies

+o-

oo-

6

+---

oo-

Control-, Gateway- +/o +/o

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Which could be a good abstraction?

7

perception cognition action

event condition action

<L*, luminance < 1000Lx, light_on()> State!

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Gateways Gateway Service3

Virtual State Layer4

Services/ Applications5

Service

Physical World1

Sensors/ Actuators Sensor Actuator Sensor/ Actuator2

Advanced Reasoning

State Virtualization

Knowledge AgentKnowledge Tree

Orchestration LogicIntroducing Virtual State

8

0x42

GW

S 5000Lx

5000Lx

It is DAY

Knowledge Brokerage

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Tuple Space

9

Producer

Consumer

Tuple Space

<String address, String typeID, String value>

<address, typeID, String>

queries

E.g.: Linda, JavaSpaces, TSpaces, ...

subscribes

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Virtual State Layer Tuple Space• Full spatial and temporal decoupling• Data-type-based search• Unified interface: search, get/set, subscribe

• Hierarchically structured tuples• Semantical locator/ID split

via type-based search• Multi-inheritance• Shared global data-type repository

for convergence (Model Store)• Dynamically extensible data model

• Address-based subscriptions

10

Gateway Service

Virtual State

Service

Sensor/ Actuator

Knowledge Tree

Model StoreGlobal

HomogeneousAPI

Portable Apps

Dynamic Extensibility

LocalKnowledge

Store

RemoteKnowledge Directory

get

set

subs

crib

eKnowledge Agent

sear

ch

Gat

eway

Ser

vice

Con

trol

Ser

vice

UI S

ervi

ce

...

ActuatorSensor

Har

dwar

eU

nder

lay

Kno

wle

dge

Age

ntO

verl

ay (

VSL

)

Logical ConnectivityPhysical Connectivity

TCP, OSGI, XMPP

Alive Ping,KOR Update

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

Dyn. Extensibility

App Portability

Service Simplicity

API Homogeneity

centralized orchestration supported by gateways abstraction

via ontologies

+

o

o

o

-

-

12

+

+

+--- ++

oo- ++

VirtualState Layer

Control-, Gateway- +/o +/o +/+

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

How do orchestration tasks look like?

13

with the VSL

V i r t u a l S t a t e L a y e r

L*-NotificationHandler:If (luminance < 1000Lx) then

light = on;<L*, luminance < 1000Lx, light_on()>

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces 14

with the VSL

V i r t u a l S t a t e L a y e r

We have a sm

art

spaceand

WE DEVELOP

software

!

Marc-Oliver@Pahl.de | The Missing Layer - Virtualizing Smart Spaces

The Virtual State Layer is part of the Distributed Smart Space Orchestration System (DS2OS)

• Provides autonomous knowledge storage and brokerage

• Written in Java

• Simple API: get/ set & publish/ subscribe

• Can be used via TCP socket, (OSGI, XMPP)

• GIT repository at http://www.ds2os.org/, http://dssos.net.in.tum.de/

15

Crowd-SourcingSmart Spaces today?Virtual State Layer

http://static.fashion4home.net/r17/catalog/image/show/product/38499/type/image/dim/x/name/2-sitzer-sofa-hudson-semianilin-leder-rot-50474da01b9ec.jpg

to-d

evel

op

Easy

Simple Development of Services4

1 Homogeneous API2 Portable Applications3 Dynamic Extensibility

The Missing Layer - Virtualizing Smart SpacesMarc-Oliver Pahl and Georg Carle

pahl@net.in.tum.de carle@net.in.tum.de

Technische Universität München

Thank you for your attention!Questions?

http://ds2os.org/