January 19: Meeting Minutes

Paul Miner - NASA

CPS VO link – forum to exchange ideas and post meeting minutes etc. http://cps-vo.org/

Quote – This provides a start but missing real-time scheduling

• Paul Miner -   John Rushby provided this link to Hermann Kopetz’ retirement colloquium this past September.  
  http://ti.tuwien.ac.at/events/time-in-cyber-physical-systems-public-research-colloquium-on-the-occasion-of-the-retirement-of-professor-hermann-kopetz
  Quoting from the overview:
  A cyber-physical system consists of two interacting subsystems, a cyber-system and a physical system. The behavior of the cyber system is controlled by the execution of programs on a distributed digital computer system, while the laws of physics control the behavior of the physical system. The different models of time—dense physical time in the physical system versus discrete execution time in the cyber system, and the impossibility of perfect synchronization of the physical clocks of the nodes of a distributed computer system, lead to interesting phenomena concerning the joint behavior of these two subsystems. The colloquium is intended to shed light on these phenomena by renowned scientists who have worked on this topic from different perspectives.
• Scope – Action Item –Raj Rajkumar (CMU, raj@ece.cmu.edu) and Lui Sha (UIUC, lrs@illinois.edu) to confer to write a scope statement along with someone from the classical area, and wireless area.
• Threads of discussion
  • using knowledge of time to engineer a design (Edward Lee)
  • how to build a framework for synchronized time that considers a synchronization
  • precise synchronization not reliable; how to provision for its failure
  • maintenance of time reference is problematic depending on its original source
  • precision timed architecture
  • fault tolerance issue
  • navigational precision when GPS is disrupted
  • highway connectivity and safety vehicular network
  • degradation
  • formalizing time
  • latency issues
• Audience: Research community based with government and industry participation; 40 selected people; include real-time and precision communities; wireless,  
• Candidates – please send Joan Stanley Stanley@nitrd.gov  your suggested list of attendees and include their expertise
• David Kuehn’s suggestions:
• Matthew Barth, University of California-Riverside951-781-5782 barth@cert.ucr.edu
• David Bevly Auburn University (please note that classes start August 16)334-844-3446dmbevly@eng.auburn.edu
• Alvin Lim Auburn University Phone: (334) 844-6326 E-mail: lim@eng.auburn.edu
• Peter Stone (Dr. Stone said that he is not able to attend but recommends Dr. Au listed below.)UT Austin(512) 471-9796 pstone@cs.utexas.edu
• Tsz-Chiu Au UT Austin (512) 475-8601 chiu@cs.utexas.edu
• Ted Baker’s suggestions - Al Mok, Jack Stankovic; Al Mok suggested Walt Heimerdinger. Opinions?.  Al Mok would like to know the exact dates, though, as soon as possible
• John Eidson - Edward Lee. He also suggested that we might be able to host the meeting at UC Berkeley the week of Aug 19 (earlier in the week is best since classes start on the 23) if the committee wishes. Action Item – to send additional list of industry folks
• Paul Miner - John Rushby (SRI International, Menlo Park CA )
• Helen Gill - People who could spark the planning discussion:
• Precision time/time triggered:  Edward Lee & John Eidson (UC Berkeley), John Rushby (SRI), Steve Miller (Rockwell), Kevin Driscoll (Honeywell)
• Event-based/non-traditional control:  George Pappas (U Penn), Paulo Tabuada (UCSB), Karl-Erik Artzen (Lund)
• Rethinking real-time systems:  Jack Stankovic (UVA), Lui Sha (UIUC, tentative yes), Al Mok (UT Austin), Raj Rajkumar (CMU), Kang Shin (U Mich),  Georgio Buttazzo (Pisa), Alan Burns (York)
• Industry:  Jeff Kodowski (NI cofounder), someone from Symmetricom (maker of atomic clocks, gear)
• Industry – “consumers” of time reference, synch  (e.g, see David Kuehn’s list, )
• For the community-wide meeting, provocative speakers:
  • Leslie Lamport
  • Tom Henzinger
• John Eidson – to send list
• Format – 2 day planning session; non-traditional; identify tasks to expand for follow-on possible national workshop; identify challenge problems
• Workshop date – Targeting Aug 21 – 22
• Location – Al Wavering is investigating availability of NIST facility in Boulder at no cost; need  1 room to accommodate ~50 people and 3 to 4 break-out rooms that will accommodate 10 people each
• Define topical areas (David Kuehn’s suggestions)
  • Positioning and navigation is a key area of interest for FHWA.
    • Signal integration from global positioning satellite signals, local wireless signals, and internal system measurements. 
    • Approaches across global positioning networks
  • Connections between infrastructure and vehicles, or travelers (mobile devices)
  • Vehicles as mobile networks