tổng quan mạng NGN overview

1 Next Generation Networks 1.1 Transition to NGN 1.2 Key drivers of NGN development 1.3 Evolution of networks’ architecture to NGN 1.4 NGN architecture 1.5 Main NGN protocols and building blocks Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 1.1 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) Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 Convergence of Telephony World and Internet World Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 Transition to NGN: Second wave • Ongoing trend towards integration & interoperability of IPbased 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 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” Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 Transition to NGN: Third wave Today Tomorrow Internet Telephone network Mobile radio network IP-Network Multimedia Access - Advantages: • easy to handle • reliable • mobile Nguy n Tài Hưng - 2013 One unified network for everything Hanoi University of Science & Technology The Unified Network The Vision Situation Today Target Solution Voice Fix and Mobile The Unified Multi Service Network FR IP ATM Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 The Unified Network The Data Migration Voice The Unified Multi Service Network FR ATM Hanoi University of Science & Technology IP Pure technology/standardization matter: How different data services can transport over a unique data backbone Nguy n Tài Hưng - 2013 The Unified Network The Voice Migration Somewhat more complex - From circuit switched to packet switched - Voice switches need to disappear in the long term Voice The Unified Multi Service Network FR ATM Hanoi University of Science & Technology IP A new network concept supporting voice in a packetized environment is required The Next Generation Network Nguy n Tài Hưng - 2013 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 10 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 11 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 12 1.2 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 13 Key drivers: technologies and services Driven by Cost Reduction Possibilities Hanoi University of Science & Technology Driven by Revenue Increase Possibilities Nguy n Tài Hưng - 2013 14 NGN key drivers: From IP Technology to User and Application Centric • 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 15 NGN services Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 16 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 17 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 18 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 19 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 Hanoi University of Science & Technology Nguy n Tài Hưng - 2013 20 NGN Today: Facing the Multi-Application/Multi-Access Challenge Web, email, chat, etc Video on Demand (VoD) High Definition TV (HDTV) Gaming Conversational realtime communication Smart Home 21 ERROR: stackunderflow OFFENDING COMMAND: ~ STACK: