efficient information lookup for the internet of things

Efficient information lookup for the Internet of Things

G.F. Marias, N. Fotiou, G.C. Polyzos

Mobile Multimedia Laboratory, Department of InformaticsAthens University of Economics and Business

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The Internet of Things vision Every object (thing) is

uniquely identified Each object is

associated with information Great amount of data

distributed in databases around the world

How can this information be discovered?

How can this information be managed?

Efficient information lookup for the IoT


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Structuring information Stakeholders: object creators and object

holders (e.g., manufacturer and reseller) Objects are associated with <attribute,

value> pairs Global Read-Only

Well known, values set by creators once (e.g., “ingredients” )

Global Editable Well known, each holder may set value (e.g., “price”)

Local Specific to a holder (e.g., “shelf number in which the

product is stored”)


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Information lookup Attribute values are learned using lookup services Lookup services are accessed using scopes “Scope: a meta-service that accepts as input

attribute queries and forwards them to the appropriate lookup service”

Scopes are accessed through a URI known as the Scope Id (SId) SId can act as a network level access control mechanism

(e.g., private IP vs. public IP) Scopes are hierarchically organized: child scopes

have access to the information stored in parent scopes


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Operations Scope Creation

Creates a new scope and positions it in the scope hierarchy

Scope-level access control policies can be defined Attribute Advertisement

Populates a scope’s lookup tables Attribute-level access control policies can be defined

Attribute Subscription Query the “default scope” for the value of an attribute The query eventually reaches the lookup service

Value Forwarding Send the value of the attribute to the requestor


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Example: Medicine supply chain

Real World Structure

Information Structure

Information Structure Creation

Information lookup

Sells to

Administrates

Object

Lookup service URLObject attributes


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Information lookup


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Information lookup


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Information lookup


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Benefits Faster information lookup as information is structured Context based lookup

The context of a user can define the scope in which a query will be sent

An attribute may exist in multiple scopes with different value in each scope

Better information administration A stakeholder never looses control of the attribute’s values Attributes can be “revocated”

Scalability New scopes can be easily added Global read only attributes can be cached It is possible to create isolated enterprise specific versions of the

system No global authorities (as for example in DNS->ONS)

Thank you

[email protected]

efficient information lookup for the internet of things

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