A Device and Service Description Framework for Discovering and Reasoning in Autonomous P2P Environment

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A Device and Service Description Framework for
Discovering and Reasoning in Autonomous P2P
Environment

• N. Shimizu
• chiko_at_tom.sfc.keio.ac.jp
• Keio university

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Talk outline

• Goal of our project
• Basic motivations
• Assumptions
• Our framework
• Service model
• Device model
• XML syntax

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Original motivation
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Objectives

• New functionality creation support
• Ex.
• Speaker Amp. CD player speaker system
• Scanner Modem FAX
• Mpg encoder Storage Video

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Autonomous P2P environment

• Established P2P connection
• No yellow pages
• Multi-user
• Device variety
• Capability
• Underlying APIs
• E.g. IEEE1394, UPnP, Bluetooth etc.

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Autonomous P2P environment

• Established P2P connection
• No yellow pages
• Multi-user
• Device variety
• Capability
• Underlying APIs
• E.g. IEEE1394, UPnP, Bluetooth etc.

P2P network
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To archive our objectives

• Establishment of description framework
• Device discovery by
• Device name
• Providing services
• Reasoning to
• Determine the most appropriate device
• Solve dependencies between services

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To archive our objectives
Who has printing functionality?
I have it, send my information.
I have it, send my information.
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Issues

• Functionality abstraction
• Resource competition
• Dependency solution
• Status notification

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Description framework

• Device description
• Devices structure
• Functionality information
• Specifications
• Service description
• Capability information

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Device description

• ltDevice typedevice.specific.urigt
• ltSpecificationgt
• SPEC information
• lt/Specificationgt
• ltPrimitiveServiceListgt
• Primitive services which it provides
• lt/PrimitiveServiceListgt
• ltDeviceListgt
• Primitive devices which it has
• lt/DeviceListgt
• lt/Devicegt

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Status notification

• Static status
• Dynamic status
• Failure
• Occupied / released
• Other status

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SPEC information

• ltSpecificationgt
• ltItem keyaaagtvalue_of_aaalt/Itemgt
• ltItem keybbbgtvalue_of_bbblt/Itemgt
• lt/Specificationgt

• Attribute value list
• key
• attribute name
• string

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Primitive service

• Abstracted device functionality
• Resource in our P2P network
• Atomic operation

Im busy!
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Composite service

• New functionality composed with devices
• Composition of primitive services

Converting service
Printing service
Image printing service
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Primitive service description

• ltPrimitiveServiceListgt
• ltPrimitiveService
• typeuri_to_indentify_it
• namehuman_readable_namegt
• Capability information
• lt/PrimitiveServicegt
• lt/PrimitiveServiceListgt

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Commitment dependency
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Primitive service capability

• ltPrimitiveService type namegt
• ltInputParameterListgt
• parameter information
• lt/InputParameterListgt
• ltOutputParameterListgt
• parameter information
• ltOutputParameterListgt
• lt/PrimitiveServicegt

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Parameter information

• ltParameter nameaaa typestring /gt
• ltParameter namebbb typeinteger /gt
• ltParameter nameccc typebase64binarygt
• ltAcceptableFileTypegt
• img/jpg
• lt/AcceptableFileTypegt
• ltAcceptableFileTypegt
• img/png
• lt/AcceptableFileTypegt
• lt/Parametergt

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Summary

• Several issues for functionality composition
• Functionality abstraction
• Resource competition
• Dependency solution
• Status notification
• Our framework
• Primitive service
• Dependency solution support

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Future work

• Formalization
• Expand description framework
• Service composition
• Semantic description
• Arguments JPG, JPEG, jpeg, Jpeg, JpG .
• Service behavior
• Dynamic status notification
• Trust model

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Thank you for your attention

• And
• Have Questions or Comments?