ENGENHARIA DE SERVIÇOS SERVICES ENGINEERING

Transcrição

1 Mestrado em Engenharia de Redes de Comunicações MSc in Communication Networks Engineering ENGENHARIA DE SERVIÇOS SERVICES ENGINEERING Cenários de Mudança 2 - Setting the Context 2 1

2 Outline Internet services and applications Enterprise networking and evolution Convergence: developing toward the NGN Concept of the Next Generation Network 2

3 Definition of Intelligent Network Intelligent Network: A telecommunications network architecture that provides flexibility for facilitating the introduction of new capabilities and services, including those under customer control. Meaning the Separation of: Call control carried out in the switches Service control, implemented on computers separate from the switches Note: this is not the Soft-switch principle! 3

4 Intelligent Network Paradigm Terminals are dumb phones Switches have logic for basic call routing (1) Logic for enhanced services hosted on Service Control Point (2) is invoked by switch Specialized Peripheral plays announcements, collects digits (3), e.g.: IVR - Interactive Voice Response 4

5 How the Internet transports Information 5

6 Simple ISP Architecture 6

7 Internet Service Paradigm End-to-End Principle (1): all services are provided outside the network Intelligence resides in clients and servers Bearer Network: best-effort transport of packets across the IP network 7

8 Web Applications Paradigm 8

9 What is the Internet, really? Andrew Blum: What is the Internet, really? 9

10 Submarine Cable Map 10

11 Submarine Cable Map 11

12 Satellites 3D Interactive Map 12

13 Satellite Teleport Pictures from PT s Sintra Teleport 13

14 Enterprise networks Definition of Enterprise Network: a managed communications infrastructure serving needs of a corporation, government or similar entity with controlled access to or from public networks Implementation: virtual or dedicated Evolution: From separate voice (PBX) and data private networks to integrated real-time and information service high-speed networks 14

15 Legacy Private Networks ISP Leased Lines 15

16 Changing Enterprise Networks Integrated, not separate voice and data Global reach: any space, any time Not only large enterprises, SMEs also Range of applications and terminals Managed solutions needed: firms focus on core competence New modes of working: at home, mobile, On-Site At Home Anywhere Deskbound Agent, Accountant Teleworker --- Roving Manager, Assistant Teleworker Executives 16

17 Convergence Convergence is the tendency to come together of: Fixed-mobile: future distinctions will be between types of mobility in a single network: user, terminal and service. Telecom-Internet: related to infrastructure, regulatory and business model convergence. Services and applications: telecom, computing, information, entertainment and broadcasting. Technology and Infrastructure: common switching and transmission Business models: Convergence (of other things) means that business models can depart from the binary telco-isp form Regulatory framework: traditionally separate Body of knowledge and practice. 17

18 Features of Convergence Multiservice: Multiple services, new or formerly separate, are supported on single set of facilities Multifunction: Multiple services are supported on a single terminal Interworking: Facilities interwork to perform or extend functions Versatility: The same service or content can be delivered by different types of infrastructures or media: Composition of services or content: exploiting multiple services (content types) for more powerful services (complex content) Points of integration: diverse equipments can work into a single, common standard interface to supporting facilities. Layering: More than abstractions give separations for business and regulation Technology neutrality: designing applications independent of implementation technology allows multi-platform incarnations. 18

19 Convergence: basic principles All services over IP (from access to core) Multi-Service Access Node (edge) Metro Node (IP Service Node) Quality of Service (QOS) support Mobile and fixed network integration Middleware 3GPP/3GPP2 IMS (IP Multimedia Subsystem) Reusable service components (SOA approach) One touch support systems (OSS) Workflow engine, component orchestration 19

20 Availability, Security, Quality... 20

21 Convergence: Fixed-Mobile Infrastructures, Systems and Services GSM 3G/4G WiFi/WiMAX GPRS Enterprise ICT M2M Converged Network All IP with SIP 21

22 Convergence Networks: simple, economic, flexible... as with Ethernet Multi-Service Access Convergent Core Copper WWW Fibre & Copper DSL Grooming IP/MPLS/WDM Wireless Call Servers End User ~2k sites ~100 sites 22

23 Convergence: Fixed-Mobile Fixed, Wireless, Mobile Accesses Collaboration Applications: Presence, Localization... 23

24 Multiservice Core Network 24

25 Content Oriented Convergence 25

26 Triple Play: Definition Triple Play, is the buzz word used for Convergence of Voice, Data and Video Services in a single offer... Video Network Data Voice The advances reached with IP and Ethernet technologies made Triple Play a reality! 26

27 Triple Play: basic Architecture The basic architecture for Triple Play includes the same typical components used for Digital Television Broadcast services... Head-End Network Management System Transport/Core Network Aggregation/ Access Networks Customer Premises DVB Stream Element Management System IP FTTx Buildings Stored Digital Video Video Head-end Router/Switch xdsl VoD Server Application Server Internet PSTN VoIP Gateway TV+STB Houses PC Management Platform: NMS, OSS and Middleware 27

28 Defining Convergence On one hand: Convergence is characterized by the ability to offer multiple services using a single set of facilities Cont A App1 App2 App3 Network Services Infrastructure Cont B On the other hand: Convergence is characterized by the ability to offer a particular service on multiple types of facilities Content Application NS 1 NS2 Other Inf 1 Inf 2 28

29 Business Model for Convergence Converge is not a Business Opportunity but a must for the Survival of the Operators... One network, multiple revenue streams Video-optimized Access network Video, Voice and Data Bundled revenue streams Reduced service delivery costs Single Network Management Platform Customer retention Customer with multiple services less likely to change providers Customer s power of choice focused toward service options Triple Play = Triple Pay End to End Network Management Video Services Bundled Service Revenue Internet Service Reduced Costs PC Residential Gateway Multi-service Access Platform PSTN 29

30 Last Words Convergence is a tendency, not a big-bang happening Often better to think in terms of: Evolution: the process of incremental enhancement of a technology or facilities, with some surviving and others dying Migration: the process of moving from the use of a present technology to provide a service to new technologies that supplant the old and provide new service possibilities Convergence means different things to different people: always ask for a definition! 30

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32 References and Readings Websites: British Telecom - Next Generation Broadband Building the Carrier-Class IP Next-Generation Network, products_white_paper0900aecd802e2a52.shtml Documents: H. Hanrahan, Chapter 1: Setting the Context for Evolution and Convergence of Networks in Network Convergence: Services, Applications, Transport, and Operations Support, John Wiley & Sons, 2007 M. El-Sayed, J Jaffe, A View of Telecommunications Network Evolution, IEEE Communications Magazine, December 2002 W. Mohr, W. Konhäuser, Access Network Evolution Beyond Third Generation Mobile Communications, IEEE Communications Magazine, December

33 References and Readings Documents: R. Wood, Next-Generation Network Services, Cisco Press, 2005 V. K. Gurbani and X.-H. Sun, "2: Internet Telephony: The Evolution to a Service-Oriented Architecture," in Architecting the Telecommunication Evolution, Cisco Press, 2005 M. H. Reeve, C. Bilton, P. E. Holmes, M. Bross, Networks And Systems For BT In The 21st Century, IEE Communication Engineer, October/ November