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1 6. Next Generation Networks 6.1. Transition to NGN 6.2. Key drivers of NGN development 6.3. Evolution of networks’ architecture to NGN 6.4. NGN architecture

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  • 1 6. Next Generation Networks 6.1. Transition to NGN 6.2. Key drivers of NGN development 6.3. Evolution of networks architecture to NGN 6.4. NGN architecture 6.5. Main NGN protocols and building blocks
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  • 2 6.1. Transition to NGN: First wave Growth of Internet and other IP-based networks with their requirements for bandwidth and capacity has driven rapid innovation in telecommunication access and transport networks Examples: leveraging copper wire last-mile networks through digital subscriber line (DSL) technologies re-architecturing of cable networks to support IP services advances in optical networking technologies (e.g. PON)
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  • 3 Convergence of Telephony World and Internet World
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  • 4 Transition to NGN: Second wave Ongoing trend towards integration & interoperability of IP- based and PSTN network services and applications Emergence of differentiated Quality of Service IP-based services Managed end-to-end performance needed for new applications requiring real-time traffic (e.g., video, voice) New network management, QoS, traffic engineering, pricing & accounting models
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  • 5 Transition to NGN: Third wave Evolution of current PSTN, mobile, wireless and IP-based networks to unified Next Generation Networks providing both Internet and carrier-grade telecommunications networks and services offerings with QoS Transition to Third wave: Ubiquitous & Pervasive Networks anybody, anytime, anywhere Global Information Infrastructure (GII) ITU, 1995 EII ETSI Project (1995) ETSI 3GPP (1998) 3GPP activity (FMC and IMS development) TISPAN Project (ETSI, 2003) TISPAN - Telecoms & Internet converged Services & Protocols for Advanced Networks ITU NGN 2004 Project Y.1xx ITU-T SG 13 NGN Architecture, Evolution and Convergence
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  • 6 One unified network for everything TodayTomorrow Telephone network Mobile radio network IP-Network Multimedia Access - Advantages: easy to handle reliable mobile Internet Transition to NGN: Third wave
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  • 7 The Unified Network The Vision Situation Today Target Solution Voice Fix and Mobile Voice Fix and Mobile FR IP ATM... The Unified Multi Service Network The Unified Multi Service Network
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  • 8 The Unified Network The Data Migration Voice FR IP ATM... The Unified Multi Service Network The Unified Multi Service Network Pure technology/standardization matter: How different data services can transport over a unique data backbone
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  • 9 The Unified Network The Voice Migration Voice FR IP ATM... The Unified Multi Service Network The Unified Multi Service Network Somewhat more complex - From circuit switched to packet switched - Voice switches need to disappear in the long term A new network concept supporting voice in a packetized environment is required The Next Generation Network A new network concept supporting voice in a packetized environment is required The Next Generation Network
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  • 10 ITU-T definition of NGN (Y.2001, Feb 2004) A Next Generation Network (NGN) is a packet-based network able to provide services including Telecommunications Services and able to make use of multiple broadband, QoS-enabled transport technologies and in which service-related functions are independent from underlying transport-related technologies. It offers unrestricted access by users to different service providers. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users. One of the primary goals of NGN is to provide a common, unified, and flexible service architecture that can support multiple types of services over multiple types of transport networks.
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  • 11 NGN is the public packet-based network with the following main features: Layered architecture Open interfaces between the layers and all other networks Seamless control of multiple transport technologies Centralized intelligence
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  • 12 NGN Characteristics The NGN is characterized by the following fundamental aspects: Packet-based transfer in the core NGN network Support for a wide range of services, applications and mechanisms (including real time/ streaming/ non-real time services and multi-media) Independence of service-related functions from underlying transport technologies Separation of control functions among bearer capabilities, call/session, and applications/services Broadband capabilities with required end-to-end QoS Interworking with legacy networks via open interfaces Generalized mobility Unrestricted access by users to different service providers Services convergence between Fixed/Mobile Compliance with all Regulatory requirements, for example concerning emergency communications, security/privacy, etc.
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  • 13 6.2. Key drivers of NGN development Short Term objective: Create new revenue possibilities Removal of boundaries between voice and data opens the way to new kind of services Can be realized relatively quickly with limited investments Long Term objective: Realize cost savings Simpler network More efficient network Cheaper network components Full benefit only realized when all separate networks have fully migrated towards to the target solution
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  • 14 Driven by Cost Reduction Possibilities Driven by Revenue Increase Possibilities Key drivers: technologies and services
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  • 15 User demands easiness to use and personalization of services seamless service regardless of the access technology a beautiful garden offering valuable services with security openness to the entire Community Operator challenges need to be addressed need to manage complexity to deliver simplicity platform for convergence of services and technologies support of different device and access technologies revenue opportunities by mobility and nomadicity, worldwide use support migration from existing technologies NGN key drivers: From IP Technology to User and Application Centric
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  • 16 NGN services
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  • 17 NGN Services Voice Telephony NGN will likely need to support various existing voice telephony services (e.g., Call Waiting, Call Forwarding, 3-Way Calling, various IN features, various Centrex features and etc.). Data Services Allows for the real-time establishment of connectivity between endpoints, along with various value-added features Multimedia Services Allows multiple parties to interact using voice, video, and/or data. Virtual Private Networks (VPNs) Voice VPNs improve the interlocation networking capabilities of businesses by allowing large, geographically dispersed organizations to combine their existing private networks with portions of the PSTN, thus providing subscribers with uniform dialing capabilities..
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  • 18 NGN Services Public Network Computing (PNC) Provides public network-based computing services for businesses and consumers. Unified Messaging Supports the delivery of voice mail, email, fax mail, and pages through common interfaces. Information Brokering Involves advertising, finding, and providing information to match consumers with providers. E-Commerce Allows consumers to purchase goods and services electronically over the network. Home banking and home shopping fall into this category of services. This also includes business-to-business applications
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  • 19 NGN Services Call Center/Web Contact Services A subscriber could place a call to a call/Web contact center agent by clicking on a Web page. Interactive gaming Offers consumers a way to meet online and establish interactive gaming sessions (e.g., video games). Distributed Virtual Reality Refers to technologically generated representations of real world events, people, places, experiences, etc., Home Manager With the advent of in-home networking and intelligent appliances, these services could monitor and control home security systems, energy systems, home entertainment systems, and other home appliances.
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  • 20 Applications VoIP Web Browsing Chat Instant Messaging WAP Browsing Multimedia Messaging VoD Movies/Gaming/News/Sports/Training Video Telephony Video Broadcasting Video Conferencing Video Collaboration IP PBX/Centrex Email
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  • 21 NGN Today: Facing the Multi-Application/Multi-Access Challenge Conversational real- time communication Web, email, chat, etc. Video on Demand (VoD) High Definition TV (HDTV) Gaming Smart Home
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  • 22 6.3. Evolution of networks architecture to NGN The unified network will use packet-based technology as the common transport mechanism Data is the fastest growing segment due to Success of Internet Growing use of E-mail Growing data traffic between business users Data should be handled in the most efficient way Packet technology is the best way to transport data Packet technology is only technology that allows simultaneous delivery of different information streams towards one and the same end-point on one single connection
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  • 23 Evolution of network architecture Traditional telephony - Circuit switch based PSTN
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  • 24 Evolution of network architecture Circuit Switched PSTN + Packet Switched IP network (VoIP Gateway) SG Signaling gateway MGC Media gateway controller MG Media gateway
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  • 25 Evolution of network arc

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