Embed Size (px)
DESCRIPTION
Given the expected high number of accessible digitally augmented devices and their communication requirements, this paper presents our work on creating a Web-based infrastructure for smart things to facilitate the integration, look-up, and interaction with such devices for human users and machines. To exploit the locality of interactions with and between smart things, the proposed infrastructure treats the location of a smart thing as its main property and is therefore structured hierarchically according to logical place identifiers. We discuss the infrastructure's look-up mechanism that leverages Web patterns to foster scalability and load balancing and features an advanced caching mechanism that greatly reduces the response time and number of exchanged messages. These properties are demonstrated in an evaluation in a simulated smart environment.
Citation preview
Simon Mayer Dominique Guinard Vlad Trifa Distributed Systems Group ETH Zurich simonmayerinfethzch
3rd Int Conf on the Internet of Things Wuxi China 2012 Infrastructure for Smart Things Searching in a Web-based
The Web of Things
2
+ Internet Connection + Embedded Web server
+ Resource-Oriented Modelling (REST)
JW Hui and DE Culler IP is dead long live IP for wireless sensor networks 2008
10262012 IoT 2012 Wuxi China
Example RESTful Sun SPOTs
Resources and Links between them
3 IoT 2012 Wuxi China 10262012
Temperature Sensor httphost[SpotName]sensorstemperature
LED Switch httphost[SpotName]actuatorsleds3switch
GET
285
PUT
lsquoon
rsquo OK
M Kovatsch S Mayer and B Ostermaier Towards the Thin Server Architecture for the Internet of Things 2012
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
4 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
5 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
REST and SOAP on devices with limited resources
UDDI discontinued by IBM Microsoft SAP in 2006 Functionality removed from Windows Server in 2010 Google discontinued WS- APIs in 2011
D Yazar and A Dunkels Efficient Application Integration in IP-based Sensor Networks 2009
Power Consumption [mW] Completion Time [s]
6 10262012 IoT 2012 Wuxi China
[derekskebacom]
The Web of Things ndash Community
WoT Workshop Series webofthingsorgwot 2010 PerCom Mannheim 2011 Pervasive San Francisco 2012 Pervasive Newcastle
Community blog LinkedIn Group Twitter
7 UbiRobots12 Workshop Pittsburgh PA 12212012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
The Web of Things
2
+ Internet Connection + Embedded Web server
+ Resource-Oriented Modelling (REST)
JW Hui and DE Culler IP is dead long live IP for wireless sensor networks 2008
10262012 IoT 2012 Wuxi China
Example RESTful Sun SPOTs
Resources and Links between them
3 IoT 2012 Wuxi China 10262012
Temperature Sensor httphost[SpotName]sensorstemperature
LED Switch httphost[SpotName]actuatorsleds3switch
GET
285
PUT
lsquoon
rsquo OK
M Kovatsch S Mayer and B Ostermaier Towards the Thin Server Architecture for the Internet of Things 2012
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
4 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
5 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
REST and SOAP on devices with limited resources
UDDI discontinued by IBM Microsoft SAP in 2006 Functionality removed from Windows Server in 2010 Google discontinued WS- APIs in 2011
D Yazar and A Dunkels Efficient Application Integration in IP-based Sensor Networks 2009
Power Consumption [mW] Completion Time [s]
6 10262012 IoT 2012 Wuxi China
[derekskebacom]
The Web of Things ndash Community
WoT Workshop Series webofthingsorgwot 2010 PerCom Mannheim 2011 Pervasive San Francisco 2012 Pervasive Newcastle
Community blog LinkedIn Group Twitter
7 UbiRobots12 Workshop Pittsburgh PA 12212012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
Example RESTful Sun SPOTs
Resources and Links between them
3 IoT 2012 Wuxi China 10262012
Temperature Sensor httphost[SpotName]sensorstemperature
LED Switch httphost[SpotName]actuatorsleds3switch
GET
285
PUT
lsquoon
rsquo OK
M Kovatsch S Mayer and B Ostermaier Towards the Thin Server Architecture for the Internet of Things 2012
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
4 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
5 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
REST and SOAP on devices with limited resources
UDDI discontinued by IBM Microsoft SAP in 2006 Functionality removed from Windows Server in 2010 Google discontinued WS- APIs in 2011
D Yazar and A Dunkels Efficient Application Integration in IP-based Sensor Networks 2009
Power Consumption [mW] Completion Time [s]
6 10262012 IoT 2012 Wuxi China
[derekskebacom]
The Web of Things ndash Community
WoT Workshop Series webofthingsorgwot 2010 PerCom Mannheim 2011 Pervasive San Francisco 2012 Pervasive Newcastle
Community blog LinkedIn Group Twitter
7 UbiRobots12 Workshop Pittsburgh PA 12212012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
4 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
5 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
REST and SOAP on devices with limited resources
UDDI discontinued by IBM Microsoft SAP in 2006 Functionality removed from Windows Server in 2010 Google discontinued WS- APIs in 2011
D Yazar and A Dunkels Efficient Application Integration in IP-based Sensor Networks 2009
Power Consumption [mW] Completion Time [s]
6 10262012 IoT 2012 Wuxi China
[derekskebacom]
The Web of Things ndash Community
WoT Workshop Series webofthingsorgwot 2010 PerCom Mannheim 2011 Pervasive San Francisco 2012 Pervasive Newcastle
Community blog LinkedIn Group Twitter
7 UbiRobots12 Workshop Pittsburgh PA 12212012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
The Web of Things ndash Why
Great for open interoperable APIs Greatly facilitates creation of mashups
Web features for free Bookmark your devices and their functionality Caching for scalability security mechanisms People are used to exploring the Web using a browser
Seems to facilitate application development
5 10262012 IoT 2012 Wuxi China
D Guinard I Ion S Mayer In Search of an Internet of Things Service Architecture REST or WS- A Developerrsquos Perspective 2011
The Web of Things ndash Why
REST and SOAP on devices with limited resources
UDDI discontinued by IBM Microsoft SAP in 2006 Functionality removed from Windows Server in 2010 Google discontinued WS- APIs in 2011
D Yazar and A Dunkels Efficient Application Integration in IP-based Sensor Networks 2009
Power Consumption [mW] Completion Time [s]
6 10262012 IoT 2012 Wuxi China
[derekskebacom]
The Web of Things ndash Community
WoT Workshop Series webofthingsorgwot 2010 PerCom Mannheim 2011 Pervasive San Francisco 2012 Pervasive Newcastle
Community blog LinkedIn Group Twitter
7 UbiRobots12 Workshop Pittsburgh PA 12212012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
The Web of Things ndash Why
REST and SOAP on devices with limited resources
UDDI discontinued by IBM Microsoft SAP in 2006 Functionality removed from Windows Server in 2010 Google discontinued WS- APIs in 2011
D Yazar and A Dunkels Efficient Application Integration in IP-based Sensor Networks 2009
Power Consumption [mW] Completion Time [s]
6 10262012 IoT 2012 Wuxi China
[derekskebacom]
The Web of Things ndash Community
WoT Workshop Series webofthingsorgwot 2010 PerCom Mannheim 2011 Pervasive San Francisco 2012 Pervasive Newcastle
Community blog LinkedIn Group Twitter
7 UbiRobots12 Workshop Pittsburgh PA 12212012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
The Web of Things ndash Community
WoT Workshop Series webofthingsorgwot 2010 PerCom Mannheim 2011 Pervasive San Francisco 2012 Pervasive Newcastle
Community blog LinkedIn Group Twitter
7 UbiRobots12 Workshop Pittsburgh PA 12212012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Overview amp Requirements
8 IoT 2012 Wuxi China 10262012
Increasing number of networked smart devices More and more human-thing and thing-thing interactions
Infrastructure to enable service discovery and
brokerage in smart spaces
Most frequent interaction with nearby devices Interactions exhibit locality
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Overview amp Requirements
9 IoT 2012 Wuxi China 10262012
Exploit Locality of Interactions
Scalability
Self-Management
User-friendliness Open easily usable APIs
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
To what extent can Web technologies and patterns be applied in the design of a smart
things infrastructure
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
Nodes are only aware of their direct neighbors Nodes can be virtual or embodied (eg on routers or NAS)
11 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Hierarchy of Management Nodes
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
Device Discovery Router is knowledgable of connected network devices IP addresses exposed via OpenWRT + LuCi
Resource Discovery Interpret any accessible information (eg location) Multiple interpretation strategies (eg for HTML Microdata) Extensible at run time
12 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Device Discovery amp Registration
S Mayer and D Guinard An Extensible Discovery Service for Smart Things 2011
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
13 IoT 2012 Wuxi China 10262012
Search within the current subtree Exhaustive Query Full subtree Best-Effort Query Until first hit Cardinality Query Until k hits
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
14 IoT 2012 Wuxi China 10262012
Search outside current subtree Request For Query
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Types
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
15 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
16 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
17 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Handling
Floor5queriesqueryID - Query representation - received answers - Pending nodes Floor5
501 502
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
18 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Query Caching
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes 4 query types 1000 queries each varying concurrency Strong decrease of answering time with increasing
concurrency level
Query Caching works
19 IoT 2012 Wuxi China 10262012
CAQ (30) CAQ (200)
BEQ EXQ
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
20 IoT 2012 Wuxi China 10262012
A Web-based Infrastructure for Smart Things Searching for Devices amp Services ndash Automatic Load Balancing
Floor5queriesqueryID - Query representation - received answers - Pending nodes
Floor5
501 502 BEQ
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
Simulation Environment
9 Nodes 600 sensors registered to room-level nodes BEQs to MainBuilding
Baseline gt 90 of answers from Floor5 Flooding of Floor5 gt 96 of answers from Floor6
Load Balancing works
21 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
22 IoT 2012 Wuxi China 10262012
Web patterns to create a smart things infrastructure
ldquoAll you need is HTTPrdquo
ldquoResource-oriented Queryingrdquo scales reduces
response time and enables automatic load balancing
Conclusions
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
23 IoT 2012 Wuxi China 10262012
Integrate with relative indoor localization system
Extend resources with semantic descriptions for M2M
service provisioning
Enhance current keyword-based searching mechanism
Future Work
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
Acknowledgements
Matthias Kovatsch Dominique Guinard Vlad Trifa
24 IoT 2012 Wuxi China 10262012
