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A survey on Web Services in Telecommunications
Donna Griffin and Dirk PeschCork Institute of Technology, Ireland
IEEE Communications Magazine, July 2007
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Outline
Introduction SOA and web services SOA benefits in telecommunications Event-driven architecture Supporting web services in telecommunications Application integration Research directions Conclusion
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Introduction
3 phenomena Changes in regulation Increased competition Technological progress
Changes in regulation FCC(USA), Ofcom(UK)
Move from monopoly to competition Mobile Virtual Network Operators(MVNOs)
Virgin Mobile -> Sprint(USA),T-Mobile(UK)
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Increased competition Major cost in 3G licenses European failure(French v.s. Finnish) Obsession -> killer application recoup the cost->focus birth
of the killer application enviroment New era
Cutting costs Stimulating service growth Innovation Reducing churn by consistently exceeding the customer’s QoS
expectations
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3GPP IP multimedia subsystem Horizontal approaches to service delivery IP-based approach
Max revenue Not a walled garden approach Service context changes Micro services
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SOA
Application architecture Self-contained Modular Interoperable Loosely-coupled Location-transparent composite entities (SLAs)
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Web services
4 organizations World Wide Web Consortium (W3C) Organization for the Advancement of Structured
Information Standards (OASIS) Liberty Alliance Web Service Interoperability (WS-I)
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Web services
3 main standards Simple Object Access Protocol (SOAP) Web Service Description Language (WSDL) Universal Description Discovery Integration (UDDI)
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SOA BENEFITS IN TELECOMMUNICATIONS
1/3 subscribers on 3G networks by 2010 Over US $1 trillion with 66 percent from 3G
Offer increasing levels of value and differentiation Developed easily Deployed quickly Altered efficiently
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Research by Forrest and IBM 35 SOA projects
Increased flexibility 97% decreased cost 71% reduced risk 51% increased revenue 43% enabled new products
Sprint The Locator application (integrated with GPS)
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EVENT-DRIVEN ARCHITECTURE
complements SOALong running asynchronous process
capabilitiesApplications and systems to be constructed in
a mannerBased on event-condition-action rules
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JSLEE - Java APIs for Intelligent Networks (JAIN) service logic execution environment (SLEE) Visionary contribution Advancing EDASs (ED application servers) JSR-22 / JSR-240
Low-latency High-throughput standard based SLEE
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SUPPORTING WEB SERVICES IN TELECOMMUNICATIONS
Unification of web servicesWeb Service SIP (WSIP)Gateway interfaces
Open Service Access Parlay Parlay-X JAIN
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European Telecommunications Standards Institute (ETSI) Common Object Request Broker Architecture (CORBA) Remote Method Invocation (RMI) Parlay-X
HTML XML
European Computer Manufacturers Association (ECMA) for Computer Supported Telecommunication Applications (CSTA) ECMA-323 /ECMA-348 /ECMA-366
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APPLICATION INTEGRATION
Existing systems simply cannot be thrown away
Enterprise service bus (ESB) Transport services Event services Mediation services
Java Messaging Service (JSR 194)
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RESEARCH DIRECTIONS
Semantic web OWL Web Ontology Language for Service (OWL-S) Web Service Modeling Ontology (WSMO)
Grid computing (WS-Resources) Web service Management Fujitsu and France Telecom
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CONCLUSION
Deal with Increasing levels of software complexity The future success depends on
more mature models /reference architectures / capabilities
More coherent / Less conflicting - Web service standards
Good ideas are not adopted automatically. They must be driven into practice with courageous patience.
