These slides presents a brief overview of the context platform developed by Portugal Telecom Innovaçao. This platform will support the context-awareness features of the CDD environment of the CaaS project.

1. PTIN Context Platform
CaaS Meeting
January 2014
Telma Mota | telma@ptinovacao.pt
Ricardo Azevedo | ricardo-a-pereira@ptinovacao.pt
Este documento é propriedade intelectual da PT e fica proibida a sua utilização ou propagação sem expressa autorização escrita.

2. Outline
 Context
 Context Management
 Context Architecture
 Context Platform
• Requirements
• The Platform
• The Technologies
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3. Typically what is context?
 Information about an entity (e.g.
person, room, device)
 Examples:
•
Location
•
Sensors (e.g. temperature)
•
Social Networks (e.g. likes, friends)
•
Web (e.g. weather, calendar)
•
Activity (e.g. running, sleeping)
•
Well Being (e.g. heart beat)
•
…
 ToDo: Define what will be the business context
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4. Context Management
• Defines the architectural elements for creating non-vertical
context-aware services
• Context Sources detect context changes and inform Providers
• Context Providers publish the context information in the Broker
• Context Broker distributes the information to the Consumers
• Context Consumers use the information to provide a service
• Functions like
•
aggregate, learn, infer and predict are usually supported by more
sophisticated Context Providers
•
keep a single point of acccess and history are usually supported by the
Context Broker by is internal DB or external.
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5. Context Architetcture
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6. Context Platform Requirements
• Take into account the ETSI M2M specifications
•
Resource Oriented Architecture; M2M Information Model
•
Protocol: CoAP
• Publish/Subscribe Model
•
Typical from messaging architectures
•
Protocols: MQTT, AMQP, XMPP
• History and Reporting
•
Big Data; Cloudera
• Service Oriented Architecture
•
Service Enablers (e.g. recommendations)
•
JBoSS/Switchyard
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7. The Platform
External Context Consumers
Applications/CNA
API
BUS
Context
Consumers
Support
Services
Context Broker
Context
Context
Context
Provider
Provider
Providers
Context
Context
Context
Provider
Provider
Sources

8. The Platform
Details
Context Consumers
APP
APP
APP
API
BUS
SE
SE
SE
NA
Support
Services
Network Service Cap.Layer
Context Broker
REST
CoAP MQTT AMQP
Context
Context
Context
Provider
Provider
Providers
Context
Sources
Sensors
(Humidity, luminosity, t
emperature,...)
Web
(Weather, Calendar, ...
SNs(FB, Tweeter,...)
Mobile Device
(location, net
measures

9. The Technologies
• Jboss
• Switchyard
• Apache Camel + Apache ActiveMQ
• ETSI Gateway: NA (Network Application) + NSCL (Network
Service Capability Layer )
• Cloudera
• Sentry, Hadoop, Impala, Hbase
• Interfaces:
•
HTTP, REST/Jason
• Protocols MQTT, AMQP, CoAP
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10. The Model
Consumer
subscribes
0...n
1
Broker
mediates
1
Application
Id
name
1...n
relates to
0...n
Entity
id
entityName
is charaterised by
0...n
0...n
Provider
1
owns
Context ype
typeName
has
0...n
Source
1
1
1...n
Context
id
attributeName
attributeVariance
value
unity
timestamp