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Coordination of Safety-Critical Mobile Real-Time Embedded Systems. Aline Senart , M é lanie Bouroche, Barbara Hughes and Vinny Cahill Distributed Systems Group Trinity College Dublin Ireland CRTES, April 4th, 2006. Motivations. Mobile devices + wireless capabilities. =>.

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coordination of safety critical mobile real time embedded systems

Coordination of Safety-Critical Mobile Real-Time Embedded Systems

Aline Senart, Mélanie Bouroche, Barbara Hughes

and Vinny Cahill

Distributed Systems Group

Trinity College Dublin

Ireland

CRTES, April 4th, 2006

motivations
Motivations

Mobile

devices

+

wireless

capabilities

=>

Mobile safety-critical

applications

Key requirement: Real-time coordination

impediments 1 2
Impediments 1/2
  • Proactive routing useful? Partition anticipation? Mobility prediction? How to limit excessive resource reservation?
  • Can we provide temporal guarantees by imposing some constraints? Is it possible to inform the application about a decrease of latency or a network partition? How can we provide such a feedback in real-time?
  • Timely communication is hard to provide

Event producer

Interested consumer

P

Other nodes

X

Adequate real-time (ad hoc)

wireless communication models

impediments 2 2
Impediments 2/2
  • Application-wide safety constraints are difficult to guarantee for interacting embedded systems

Appropriate real-time

coordination models

  • Is it possible to automate the translation of application-specific constraints into constraints on individual embedded systems?
  • How to keep distributed views and actions timely and consistent?
  • How to resynchronise outdated views in a bounded interval of time?
conclusion
Conclusion
  • Need for real-time coordination of safety-critical mobile embedded systems
    • Adequate real-time wireless communication and appropriate coordination models required
  • Our current research
    • Designing and implementing the Space-Elastic Model that returns to application a varying geographical area in which real-time communication is guaranteed
    • Currently investigating a coordination model able to ensure system-wide safety constraints