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Topics
- Motivation
- Why SOA Web Services DPWS
- Projects
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Software Integration of Medical Devices An Important Issue in Modern - - PowerPoint PPT Presentation
Software Integration of Medical Devices An Important Issue in Modern - - PowerPoint PPT Presentation
Software Integration of Medical Devices An Important Issue in Modern Health Technology D IRK T IMMERMANN F RANK G OLATOWSKI I NSTITUTE OF A PPLIED M ICROELECTRONICS UND C OMPUTER E NGINEERING U NIVERSITY OF R OSTOCK Topics Motivation Why
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Networked Devices
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(Harbor Research)
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Operating Room = dozens of networked devices
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(Olympus)
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Current Situation in Medical Automation
- Plenty of devices
- Mostly autonomous
- Vendor specific, incompatible, proprietary
– …physical interfaces – …data interchange formats Missing system integration
- Solution
– Step 1: Use Standards, i.e. IP as the lingua franca – Step 2: Find Interoperability Standard, independent from
» Platform, Comm. Interface, Operating System, Application Domain
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(DGBMT)
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Standards for networked devices
“The nice thing about standards is …. ….you have so many to choose from”*
(*) A. Tanenbaum
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More standards than devices ?
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SOA Web Services DPWS
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Service Oriented Architecture (SOA)
- Dynamic Advertising, Discovery, and Use of
Services in a Network Plug and Play
Network Service Provider Service Directory Service Requester
1 . A d v e r t i s e
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Web Services
- Realization of SOA in Enterprises
– eBay, Google, Amazon, IBM…. – based on TCP/IP
- XML (Extensible Markup Language)
– use XML messages
- SOAP
– for messaging
- WSDL (Web Services Description Language)
– to describe services
- BUT
– communication overhead – not suitable for smaller devices
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Web Services
- Building blocks of protocols for a given task
- Profiles: Specific combinations of Web Services
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- originally UPnP V2.0
- OASIS standard since 07/2009
- fundamental for huge
European SW Integration Projects
- Included in MS Windows
Devices Profile for Web Services
Web Services for Devices!
- DPWS, a Profile and Open
Source Standard for distributed embedded systems, based on Web Services
- Defines optimizations and
constraints which allow porting Web Services even to resource limited devices
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! !
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www.ws4d.org Open Source Stacks & Tools based on DPWS
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Cooperation based on DPWS
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DPWS driven device
Physical Layer (802.x …., arbitrary) Physical Layer (802.x …., arbitrary)
TCP TCP UDP UDP HTTP HTTP SOAP-over-UDP, SOAP, WSDL, XML Schema SOAP-over-UDP, SOAP, WSDL, XML Schema
WS-Discovery WS-Discovery WS-Eventing WS-Eventing WS-MetadataExchange/ WS-Transfer
Application Application
WS-Policy, WS-Addressing, Security WS-Policy, WS-Addressing, Security IPv4 / IPv6 / IP Multicast IPv4 / IPv6 / IP Multicast
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Projects and Tools
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OSAmi
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- Open Source Ambient Intelligence Commons
- European Interoperability Project, 34 partners
- eHealth Demonstrator
OSAMI OSAMI
CDA XDS XPHR
DPWS/ WS4D
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uService
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- Service Creation for Mobile Systems
- European interoperability project, 17 partners
- Easily create services for PDAs and integrate sensors
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PipesBox for Service Composition
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Browser based Easy No install Simple creation of workflows Online testing
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Take Home Messages
- Do not reinvent the wheel
– Proven Standards (IP, SOA, Web Services) and HW/OS/Comm/App/Vendor Independence pay off
- Device Profile for Web Services
– Plug and Play, Open Source Standard, Windows compliant – Free Software Stack for Linux/MacOS/Android/Embedded Systems – Scalable from miniaturized sensors up to enterprise servers – Extensible wrt Realtime / Security / Quality of Service – Graphical Tools
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