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Towards Enabling Internet-Scale Context-as-a-Service: A Position Paper Alexandru SORICI, Andrei OLARU, Adina Magda FLOREA University Politehnica of Bucharest What is Context-Awareness? Context is any information that can be used to

  1. Towards Enabling Internet-Scale Context-as-a-Service: A Position Paper Alexandru SORICI, Andrei OLARU, Adina Magda FLOREA University Politehnica of Bucharest

  2. What is Context-Awareness? Context “is any information that can be used to characterize the situation of an entity. An entity is a person, place, or object that is considered relevant to the interaction between a user and an application, including the user and applications themselves” [1] [1] Abowd, Dey et al: Towards a better understanding of context and context-awareness, 1999 2

  3. What is Context-Awareness? Context “is any information that can be used to “Context is the dressing of a focus” [2] characterize the situation of an entity. An entity is a person, place, or object that is considered relevant to the interaction between a user and an application, including the user and applications themselves” [1] [1] Abowd, Dey et al: Towards a better understanding of context [2] Brézillon and Patrick Brézillon. Context Modeling: Context as a and context-awareness, 1999 Dressing of a Focus, 2007 3

  4. What is Context-Management Getting the relevant context information from the provider to the consumer in a meaningful manner (Provisioning, Inference/Analysis, Deployment, Authorization/Access Control, …) 4

  5. What is Context-Management Getting the relevant context information from the provider to the consumer in a meaningful manner (Provisioning, Inference/Analysis, Deployment, Authorization/Access Control, …) Provisioning and Deployment perspective: Search, Discoverability ● ● Control sharing of context 5

  6. Sensing as a Service [ Perera et al, 2014]: Sensing as a Service Model for Smart Cities Supported by Internet of Things, Trans. Emerging Tel. Tech. Personal owners Common Middleware Home Automation Private/Public Organizations ● Localized/Aggregated Analytics Smart Environments Data Providers ● IoT Ecosystem Smart Cities ● Enable creation of new business Smart Agriculture models Logistics ... 6

  7. Sensing as a Service - Scenario 7

  8. Shortcomings in structuring context information NGSI-LD 1 and W3C ThingDescription 2 model content only → no explicit information structuring FI-WARE Context Management Architecture ● ContextBroker has no means to logically split managed context information ● Defines centralized flow Federation possible, pot ● cannot be automatized 1 https://github.com/FIWARE/NGSI-LD_Experimental/blob/master/doc/NGSI-LD_Information_Model.md 2 https://www.w3.org/TR/wot-thing-description/ 8

  9. Position We need structure to facilitate search and discoverability We want to exploit the typed relations and normative-dimension of Socio-Technical Networks The structure has to help determine: ● A logical, distributed partitioning for managing context information ( localize as much as possible) which can be actively joined, quitted , traversed ● The normative/authorization dimension - how/when are applications allowed/obligated to interconnect to share context information 9

  10. Structuring context info: ContextDimensions and ContextDomains 10

  11. Sensing as a service: modeled 11

  12. Conclusion Position : large-scale context-as-a-service stands on augmenting models for representing context (e.g. ThingDescription) with structure of information organization which brings: ● Facilitated search/indexing Decentralized management and query routing ● ● Exploit the agent-based view to add normative dimension to context sharing 12

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