mobile computing presentation

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					                Arkady Zaslavsky
                     Mobility Group
     School of Computer Science & Software Engineering
          InfoTech, Monash University
           A.Zaslavsky@monash.edu.au
    http://www.ct.monash.edu.au/~azaslavs/


Mobile & Pervasive Computing
   @ Monash University
Outline: •   Mobile computing overview
         •   Building research group
         •   DSSE
         •   DSTC & M3
 What is a Distributed Mobile
 Computing System
 Mobile computing is associated
  with mobility of users, hardware,
  data and software in computer
  applications.
 Specialized class of distributed
  computing systems where some
  nodes can move in physical and/or
  logical space, ad hoc connecting/
  disconnecting while remaining part
  of a distributed system and
  perhaps participating in global
  computational activities
 Mobile Computing Environment

                                Mbps to Gbps   Mobile GSM connection
                                                9.6 kbps




Home Base                                                     Home Base
 Node Ni                                                       Node Nj



            19.2-115 kbps                             Mbps
                 ...                                    ...

            Zone of Influence                      Zone of Influence

      Cellular Data                             Wireless LAN
Who needs Mobile Computing?
Mobile Computing:
Problems and Assumptions
  Location is dynamically changing
   information
  Cost of communication is asymmetric
  Severe power restrictions on mobile
   hosts
  Limited storage available on mobile
   hosts
  Frequent and foreseeable
   disconnections
  Security issues due to mobility of hosts
Building research group...

More than 25 students (PhD, Masters
 (R), Masters (C/W), Honours) in 6
 years
3-5 academics
70+ publications
1,300K+ grant money & in-kind
 support
Mobile computing laboratory
Building research group… more
                 Virtual primary copy
                       (VPC)
                      Simulation &

M. Faiz “Database     comparison
                     Replicationwith PC
 Strategy in Mobile Computing
 Environment” (Research Masters,
 completed 1995)

Yeo, L.H. ”Multiple queue based
                      Queues to support
  transaction management model in
                     
                      disconnection
  multidatabase systems” (PhD)
                     Petri nets
Building research group… more
                 Packet buffering
                      Simulation
                      Transparently sits on
S,Lai “Adaptive       top of for mobile
                   protocols TCP/IP
 computing environment” (PhD)



Oey, A.: “WWW security in mobile
  computing environment”, (Honours
  Project, 1996)
Building research group… more
                 Data link layer
                       Petri nets
                       Ad-hoc mobile
B. Mitelman, “Link     networks
                      State Routing
 Protocols”, (Research Masters)



El-Wazer, M.: “Multiprotocol
                      Gateway prototype
  gateways for mobile Packet based
                      
                      
                     (Research
  telecommunications” Protocol conversion
  Masters, 1997)     LOTOS
Building research group… more
                 Telstra mobile data
                      & WLAN
                     Simulation &

E. Sung              performance analysis
           “Software-Assisted Handover
 Model in Heterogeneous Wireless
 Computing Environments” (Research
 Masters, 1997)

Rasheed, A.: “Supporting
                      Replicating process
  disconnected operation for mobile
                      
                      prototype
                      
  data access using twin-transaction”
                      implementation
  (PhD, 1999)
Building research group… more
                 DBRefine tool
                          Oracle

S. Krishnaswamy, “Database schema
 refinement using data mining
 techniques” (Research Masters, 1998)


S. Krishnaswamy “Distributed data
                        Cost-efficient agent
 mining with   mobile agents” (PhD)
                       
                        communications
                       agent factory & CC
Building research group…
                 Two-criteria              more
                            optimisation
                           energy & work
X. Dong, “Object-oriented query
 optimisation in mobile computing
 environment” (Research Masters,
 1997)

M. Nzama, “Adaptive multimedia
                          Distributed
  applications in          computing”
                    mobilecollaboration
                        

  (PhD)                 bandwidth awareness
                        adaptability
Building research group…
                 PESOS               more
                       agents
                       ambient calculus
P. Stanski, “Supportive Operating
  Environment for Heterogeneous
  Mobile Code” (PhD)

Khoo, E.“Handoff in wireless ATM
 networks” (MEng)
K. Tan “Client/server Interaction in
 WWW Applications for Mobile
 Computing Environments” (MDigCom)
Building research group…
                 Prototype           more
                       Unique experience

W. Lee: "Oracle mobile agents in
 advanced applications" (C/W masters,
 1999)
                       Synchronising
                        calendars using SMS
Kehao Xie - "Applications
  development for Nokia-9000", (C/W)

M. Pirotta ”Advanced interfaces to
  mobile databases” (PhD)
Building research group… filemore
                 Prioritising
                       transmission for
                       caching
                      Extended info for
S. Cuce: "Cache   management
                       files
 algorithms in mobile computing”
 (Honours, 1998)
                         Dynamic file
                          consistency models
                         Glomar
S. Cuce “Mobile file systems with
  transparency support” (PhD)
Building research group…             more
                       Meta-Object Facility
                        (MOF)
J. Tan “Schema integration for mobile
 databases” (PhD)



K. Monostori “Finding overlaps &
                       Suffix trees
               digital MatchDetectReveal
  similarities in   
                    
                       libraries using
  mobile agents” (PhD)
Building research group…       more



ITAG – Itinerary Agents – mobile
 agents
TOOLS’97 Conference Wireless LAN

                        11.5km
                                                                        300m

                                                           omni                        omni
   grid antenna             grid antenna
      coaxial - 2m               coaxial - 0.25m       0.25m                              0.25m
          Caulfield              Centra                 Centra                          MCC
        Chisolm Tower            Building              Building                         Lev 5
                                             Cable
           Bridge 1              Bridge 2              Bridge 3                     Bridge 4




                                                                                          Cable
                                                                                          20m
  35m
         Ethernet




                                                      Mobile Node
                                                                      Mobile Node     MCC
                                                                                      Lev 2
                                                               omni
                                                     IBM Compatible                   Bridge 5

                                                                     Mobile Node
                                                       Mobile Node


        Monash - Melbourne Convention Centre
WLAN Infrastructure




                     •Omni-directional
                       + grid
 •Omni-directional
 •Amplifier          •Root
 •Root mode          •10-12 km radius
 •10-12 km radius    •802.11
     Future: Is it bright ???
                         SAP
             Enterprise architecture
                         DSTO
             for mobile computations
     Projects
                         Health
             $1,2M+ annual
                         Telstra/TRL
M3                       CSIRO
        – DSTC
                         Collaboration support
     Students           bandwidth
                         energy
                         weight + functionality
     Challenges
                         cost


     Opportunities
Potential Research Issues &
Projects
  Connection/Disconnection Management for Mobile
     Workstations
    Database Recovery in Mobile Environments
    Service Scheduling for Mobile Hosts
    Access Transparency in Mobile Databases
    Process and/or Data Migration in Mobile Computing
    Tracking Mobile Workstations
    Database Design for Mobile Information Systems
    Security Issues in Wireless Information Systems
    Control Protocols for Mobile Workstations
    Address Resolution in Mobile Environments
    Tools & Means for Simulating Mobile Environments
    Virtual cell optimisation and handling
    Social & technological implications of mobile
     computing
    Etc
QUESTIONS ?




       The End

				
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posted:5/7/2012
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