Bio-Net: Service Composition by Interface Matching

1
Bio-Net Service Composition by Interface
Matching

• Keita Fujii
• Prof. Tatsuya Sudas NetGroup
• University of California, Irvine
• Kfujii_at_ics.uci.edu

2
Composite Services in Bio Net

• In Bio Net, mobile agents called Cyber Entities
  (CEs) migrate around in the network
• A CE provides a service to end-users
• A CE may migrate, replicate, reproduce or die
  based on its energy and its policy
• A service is also provided as a collaboration of
  multiple CEs
• Emergence of composite services

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Service Composition by Interface Matching

• CEs identify which CEs they can interact with
  through interface matching
• If two CEs have same (or compatible) interfaces,
  they can interact

CE B
CE A
CE C
4
Input/Output Interface of CEs

• A CyberEntity has a set of input and output
  interfaces
• CEs Input Interface defines the information
  necessary to invoke its service
• CEs Output Interface describes the output
  contents of its service

CyberEntity
Input
Output
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Composite Service

• Services may be created through identifying a
  sequence of CEs that can interact (i.e., CEs with
  matching interfaces)
• If the output from a CE meets the condition
  specified by an input interface of another CE,
  these CEs have matching interfaces.
• A composite service can also be described by a
  set of input and output interfaces

A?B?C
A
B
C
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Demo Creation of Composite Services

• CEs assumed in the demo
• Song CE offers sound data of a song
• Text-to-Sound CE converts text data into sound
  data
• Speech Recognition CE converts sound data of a
  human speech into text
• Keyboard CE accepts an input from a keyboard and
  generates text data
• Speaker CE plays out sound data
• Microphone CE captures sound data from a
  microphone
• Text Display CE displays text data

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How to use Demo

• User can add (or remove) CEs to (from) the
  Bio-Net by pushing a CE button on the main window
• Bio-Net, after interface matching, displays
  available composite services in Service Result
  window
• User can invoke a composite service by pushing
  Invoke button on Service Result window

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Screenshot of Demo
CEs in the system
Available Composite Services
Available CEs
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Example of Interface Matching

• Talking PC read out text entered from a keyboard
• Keyboard CE Text-to-Sound CE Speaker CE

INPUT MIMEapplication/wav Body.
OUTPUT DEVICESpeaker
INPUT DEVICEKeyboard
OUTPUT MIMEtext/palin Body.
INPUT MIMEtext/plain Body.
OUTPUT MIMEapplication/wav Body.
Keyboard
Speaker
Text-to-Sound converter
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Example Composite Services

• Music Player
• Song CE Speaker CE
• Text Reader
• Text-to-Sound CE Speaker CE
• Talking PC
• Keyboard CE Text-to-Sound CE Speaker CE
• Voice Chat
• Microphone CE Speaker CE (on a different host)

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Current Work

• Define Interface Definition Language
• Based on XML schema
• Propose mechanisms for dynamic service
  composition
• Partner selection using CE relationship
• Lookup of composite services
• Representation of composite services
• P2P based discovery of composite services
• Supporting ambiguous service requests