1.  Copyright 2005 Digital Enterprise Research Institute. All rights reserved. www.deri.org Semantic Web Services in the environment of Next Generation Network Jana Viskova

2. February 16, 20052 Contents Motivation for NGN NGN definition NGN standardisation NGN architecture NGN Service layer NGN Web Services example NGN Semantic Web Services

3. February 16, 20053 Motivation for NGN (1) Dedicated networks for specific services Orientation towards information (knowledge) society –E-government, E-learning, E-medicine, E-commerce –New combined telecom/IT, fixed/mobile applications Liberalisation of telecom market –Horizontal and vertical –New player and new revenues Access providers -> Network resources providers -> Service providers (virtual operators, 3 rd parties) -> Content providers -> Users Dynamic IT development strategy in telecom domain

4. February 16, 20054 Motivation for NGN (2) Dedicated networks for specific services –Circuit switched network Quality guaranteed real-time communication Fixed (PSTN) and mobile (GSM) transmission media Dedicated communication channel Synchronous communication Signalling –Creation, modification and termination of connections –Resources reservation –Packet switched network Best effort, non-real time communication in burst Fixed (IP ever Ethernet Tx) and mobile (GPRS) transmission media Independently routed packets Asynchronous communication No need for signalling

5. February 16, 20055 Motivation for NGN (3) Convergence efforts –Data services delivered over PSTN circuit-switched network ISDN - dedicated limited bandwidth, time based billing –PSTN services delivered over data packet-switched network “IP telephony” - QoS guaranteed only in separate domains -Virtual circuits – combination of circuit & packet switched approach -ATM – expensive and high requirements on network management Technology development –Broadband access and transport (xDSL, SDH, …) –Higher speed routing and QoS guaranties (IPv6, MPLS, …) –Standardized signalling protocols for IP (SIP, RSVP, H.323, …) –Service platforms for telecom and IT integration

6. February 16, 20056 NGN definition User perspective –NGN enables users to get the information content they want in any media/format, over any facilities, anytime, anywhere and in any volume. [Telcordia] Operator-provider perspective –NGN enables simpler, more competitive creation, operation and provisioning of services of different nature and requirements over a convergent transport network independently on the access network. [ETSI] NGN is a model for future telecommunication networks NGN is not a new network to be build

7. February 16, 20057 NGN standardisation Magic quadrant

8. February 16, 20058 NGN architecture Layered architecture Open standard interfaces Control layer Signalling for real-time services Control of other layers Transport network High speed backbone with packet switching Support of services with different requirements (delay, jitter, packet loss,... ) Independent on the access network (gateways)

9. February 16, 20059 NGN Service layer (1) Rapid and simple service creation, implementation and provisioning Secure access to the network capabilities from un-trusted domain Open access to the network capabilities to large developers community Basic building blocks of services capabilities Transparency to the underlying network technology Possible integration of telecom, IT, enterprise applications Access to external resources (DB, presence, media servers, …)

10. February 16, 200510 NGN Service layer (2)

11. February 16, 200511 NGN Web Service example SMStoCall

12. February 16, 200512 NGN Semantic Web Services Semantic interface for telecom network –Parlay X Semantic Web Services –SIP grounding Semantic Web Service use case in NGN –Pure telecom use case –Mixed IT/telecom use case KW deliverable: Invocation and Interoperation SWS –Service interaction –Specific non-functional properties - SLA, trust issues, billing Testing environment - Focus Parlay playground within NGN Initiative