Next Generation Networks

The lecture presents different variants of NGN service architectures and their role in implementation and deployment of both services and emulation/simulation of PSTN/ISDN legacy services. Emphasis is put on presentation of the Common IMS architecture as an enabler and service delivery platform for innovative convergent services and applications which is access network neutral. The components, protocols, session control mechanisms, policy and charging, quality of service, security and approach to building services are covered in detail. The course will emphasize paradigm shift in telecom triggered by IP and SIP application protocol.

Lecture contents

1. Introduction (2h): Evolution of telecom networks and services.
   From Intelligent Networks (IN) and Softswitch via Open APIs to Common
   IMS (IP Multimedia Subsystem).


2. SIP protocol and its capabilities (4h): Overview of SIP protocol,
   architecture, components, session control mechanisms, media
   negotiation, sample message flow diagrams for selected services. SIP
   extensions for IMS.


3. General principles of the Common IMS architecture (4h): IMS
   requirements, IP multimedia sessions, QoS, interworking, roaming,
   service control, service creation, status of IMS
   standardization.


4. Overview of IMS architecture (4h): Data bases - HSS and SLF,
   P-CSCF, I-CSCF, S-CSCF, the Application Server (AS), MRF, BGCF, PSTN/CS
   gateway, types of ASs.


5. Identification in IMS (6h): private user identity, public user
   identity, public service identity, users profiles and initial filter
   criteria.


6. Session Control in IMS (2h): Prerequisites for operation in IMS,
   basic session setup, session setup through application servers, Open
   Source Core IMS.


7. AAA in IMS (2h): Authentication, Authorizing and Accounting,
   Diameter protocol. Policy and charging control.


8. IMS and IPTV (2h): IPTV definition, ETSI TISPAN NGN approach to
   IMS based IPTV services, example services.


9. Conferencing, instant messaging and presence (2h): creating and
   joining conferences, IMS presence and instant messaging model.


10. Summary and future trends (2h): Evolution to Common IMS as a
    universal framework for both mobile and fixed networks. Current status
    of IMS deployment

1. Open Source Core IMS (http://www.openimscore.org)


2. Ericsson Service Development Studio
   (http://www.ericsson.com/mobilityworld/sub/open/technologies/ims_poc/tools/sds_40)

1. M. Handley, H. Schulzrinne, E. Schooler, J. Rosenberg, Session
   Initiation Protocol, RFC 3261, IETF, 2002.


2. G. Camarillo, M. Garcia-Martin, The 3G IP Multimedia Subsystem
   (IMS) - Merging the Internet and the Cellular Worlds, Wiley, Third
   Edition, 2008.


3. H. Sinnreich., A. Johnston, Internet Communications Using SIP -
   Delivering VoIP and Multimedia Services with Session Initiation
   Protocol, Second Edition, Wiley, New York, 2006.


4. M. Poikselka, G. Mayer, H. Khartabil, A. Niemi, IP Multimedia
   Concepts and Services, Wiley, Second Edition, 2006.


5. 3GPP, ETSI, ITU-T and IETF standards related to NGN.

During the course it is possible to score up to 100 points:

• 25 points for the midterm test


• 50 points for the final test


• 25 points for the Project

• 5.0: 91-110 points


• 4.5: 81-90 points


• 4.0: 71-80 points


• 3.5: 61-70 points


• 3.0: 51-60 points


• 2.0: 0-50 points