A Survey On Web Services In Telecommunications

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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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SOA architecture

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SOA collaborations

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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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Example of an ECA rule

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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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JAIN SLEE architecture 鄭遠祥 98753026@nccu.edu.tw

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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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Generic ESB architecture

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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.

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