Virtual OSGi Framework and Telecommunications

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Virtual OSGi Framework and Telecommunications

• Sam Supakkul
• Yotta Networks
• Digital Pockets, LLC
• Dallas, Texas
• ssupakkul_at_computer.org

Lawrence Chung Dept. of Computer Science Univ. of
Texas at Dallas chung_at_utdallas.edu
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Can Your Cell Phone Do This?

• Phone calls
• Emails
• Calendar

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And All This Too?

• Phone calls
• Emails
• Calendar
• Watch movie
• Program VCR
• Open garage

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Why Not? Whats the Problem?

• Infrastructure low speed transmission
• Solution high speed 3G wireless
• Application hosting environment
• Static fixed pre-installed applications
• Small memory cant fit all applications
• Solution dynamic application framework such as
  OSGi Framework

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Open Services Gateway initiative (OSGi) Framework

• Features
• Component-based run-time framework for Java
  applications (bundles)
• Java API for managing bundle life-cycle
• Bundles installed or uninstalled on-demand from
  the network

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OSGi Cell Phone

• Benefits
• No obsolete apps.
• Unlimited apps.
• Limitations
• No. of concurrent apps. limited by physical
  memory
• More apps possible by explicitly uninstalling and
  installing apps.

Constraints Low Cost, Size, Weight High
Performance, Practicality
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Introduction to NFR Framework Softgoal
Interdependency Graph (SIG)
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SIG for the Existing OSGi Framework
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Problems with Existing OSGi Framework

• Benefits
• No obsolete apps.
• Unlimited apps.
• Limitations
• No. of concurrent apps. limited by physical
  memory
• More apps possible by explicitly uninstalling and
  installing apps.

Constraints Low Cost, Size, Weight High
Performance, Practicality
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SIG for the Virtual OSGi Framework

• Conclusion from SIG
• Virtual memory
• Remote server for swapped memory
• Application level swapping
• thus the term
• Virtual OSGi Framework

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Virtual OSGi Framework General Concept
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Bundle Deployment Workflow
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Virtual OSGi Framework UML Use Case Model
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Bundle QoS
Type Description Delay Threshold
Critical Safety/health related ? 2 seconds
Interactive Apps w/ user interaction ? 4 seconds
High Priority Background User expecting indirect feedback. Ex. Furnace control Minutes
Low Priority Background User not expecting feedback. Ex. Billing Mngt Hours
Bundle has a flag Interruptible?
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Virtual OSGi Framework Architecture
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Virtual Framework Manager UML Class Diagram
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GatewayBundle UML State Chart

• Preemption Criteria
• Interruptible?
• Bundle QoS

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Bundle UML State Chart
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OSGi Framework in Consumer Devices
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OSGi Framework in Smart Home Application
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Virtual OSGi Framework Walk-through using Marys
Smart Home Scenario

1. Mary requests to see the movie guide.
2. Mary selects a pay-per-view on Sleepless in
   Seattle
3. While watching the movie, she receives an IP
   phone call from her mother.
4. Mary pauses the movie and accepts the call.
5. Mary talks to her mother for a while.
6. After Mary is finished with the call, she resumes
   the movie.
7. Mary is happily enjoying the happy ending of the
   movie

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Marys Residential Gateway Application Profile
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Initial OSGi Gateway Active Bundles
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Mary requests to see the Movie Guide.
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Mary selects a pay-per-view on Sleepless in
Seattle
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The movie is paid for by Marys Digital
Wallet/eCash
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Mary receives an IP phone call from her mother.
She accepts the call.
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After Mary is finished with the call, she resumes
the movie and enjoys the ending
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Conclusion

• Contribution
• A solution to run more apps. on limited memory
  devices
• A demonstration of a software process using NFR
  Framework and RUP/UML
• Future Work
• More advanced scheduling algorithms
• Fault tolerant for handling network link failure