goal
DESCRIPTION
Web-enabled Embedded Systems ir. M. Manders, ir. P. Peters, prof. dr. ir. L.M.G.Feijs, dr.J.J. Lukkien. Example architecture. Goal. Study and solve the problem of connecting an embedded system to the Internet for monitoring and control. Architectures, product families Protocols - PowerPoint PPT PresentationTRANSCRIPT
Eindhoven Embedded Systems Institute
GoalGoal
Research
Study and solve the problem of connecting an embeddedsystem to the Internet for monitoring and control.• Architectures, product families• Protocols• Networking• Standardization and interoperability• Real-time aspects• Software platforms
AS: application serverSMP: session management
protocolTC: temperature control
Develop a distributed software architecture formonitoring and control
General questions:• platform independence• consistency and integrity of state• location of code, of intelligence• open / closed architecture, interoperability• security
System-dependent questions:• connection oriented / multi-cast• requirement of reliability in communication• internet in control loop (e.g., machine control)• resource constraints and real-time aspects• safety
Examples…
Coffee maker
A pplet
SMP
HTTPServer
AS
Coff ee Server PCRemoteBrowser
(1)
RemoteBrowser
(n)
Actuator(1)
Actuator(j )
Sensor(1)
Sensor(i)
A pplet
TC
Design issues & trade-offs• multiple users: connectionless/multi-cast• status information in AS• JAVA vs. CGI (complexity, server load)• security: SMP for conflicting users• unreliable connection permitted• prospect for miniaturization• safety: temperature control• protocol: proprietary, on top of UDP with some
adjustments to enhance reliability
Current research• Include wire-less communication links (GPRS, WAP)• New prototypes
• industrial application• controlling a robot-car
• Analyzing platform influence: • RTOS: QNX, Embedded/RT Linux• Embedded Java: servlets, applets• Miniaturization
• Taxonomy of architectures• Definition of server protocol
Web-enabled Embedded SystemsWeb-enabled Embedded Systems
ir. M. Manders, ir. P. Peters, ir. M. Manders, ir. P. Peters, prof. dr. ir. L.M.G.Feijs, dr.J.J. Lukkienprof. dr. ir. L.M.G.Feijs, dr.J.J. Lukkien
Example architecture
Aquarium
Some references• L.M.G.Feijs, M.Manders, Bewaking en besturing via
internet, in: Informatie juli/aug. 2000 (42).• H.Aalderink, Web controllable devices: concept and
design, Master’s thesis TUE 1999.• H.B.M. Jonkers, Communication and synchronization
using interaction objects, LNCS 1709, p1321.
Web controllable on the web:• http://www.eesi.tue.nl/• http://www.dsv.nl/~cogriek/alles.htm• http://www.zanussi.com/futuro/index.html