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Telecom Courses : NGN

Tutorial by:      Date: 2016-08-06 04:34:26

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NGN-next generation network

a next generation network is a packet-based network that can be used for both telephony and data and that supports mobilility. Initially, the term Next Generation Network was used to refer to the transformation of the core network to IP. Sometimes a NGN is referred to as an all-IP network.

 

  1. 1. NGN Next Generation Network Concepts Havar Bathaee University of Tehran December 7, 2014
  2. 2. Agenda  Introduction  NGN Definition  NGN Standardization  NGN Conceptual Model  Convergence Towards NGN  NGN Softswitch-Base Architecture  NGN Configuration and Topology  Conclusion Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  3. 3. Introduction PSTN NGN All-IP Network INTERNET MOBILE Others… Today, telephony, the Internet, and the cellular mobile networks continue to be different domains, each has its own protocols and services. Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  4. 4. Introduction General Idea Packets Voice Data Multimedia Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  5. 5. Introduction History Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  6. 6. NGN Definition NGN is a packet-based network able to provide Telecommunication Services to users and able to make use of multiple broadband, QoS-enabled transport technologies and in which service-related functions are independent of the underlying transport-related technologies. It enables unfettered access for users to networks and to competing service providers and services of their choice. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users. Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  7. 7. NGN Definition Characteristics  Unified Global Networking Platform  Packet-Based Network  Provides Telecommunication Services to Users  QoS-enabled Transport Technologies (Delay, Throughput, and Reliability)  Services are Independent of Transport Technologies  Unfettered Access for Users to Networks and Services  Generalized Mobility Which Allow Consistent and Ubiquitous Provision of Services to Users Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  8. 8. NGN Standardization Key Players 3GPP ITU-T ITU Telecommunication Standardization Sector ITU-T NGN-GSI ATIS NGN FG ETSI TISPAN ATIS Alliance for Telecom. Industry ETSI European Telecom. Standards Institute 3GPP 3rd Generation Partnership Project Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  9. 9. NGN Standardization Key Players (continued) Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  10. 10. NGN Standardization Problems Within the NGN concepts the standardization institutions are still working on the following issues and problems: • Existing networks migration towards NGN • Development in the field of access technologies • Connection of other networks to IP networks • Provision of services and development of new ones • Interworking in the area of addressing • Interworking of signaling systems • Roaming a mobility Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  11. 11. NGN Conceptual Model NGN applications and services, application server, features server, media server MGC, Softswitch, Call Agent, Gatekeeper Transmission Packet network, VOIP, Media gateways, Signalling gateway, Core Packet network Fixed, Data, Cable, Wireless fixed, Mobile, Satellite Access to NGN Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  12. 12. NGN Conceptual Model Management layer In the NGN it is required that the network control is not determined only by the terminal equipment applications, but that the network intelligence may carry out control over the network at all levels. Management layer tasks:  Resource management (capacity, ports, and physical elements) and QoS in access to the network and the transport network  Various media processing, encoding, data transfer (information flows)  Management of calls and connection. Management and interworking of all elements of the reference architecture  Service control Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  13. 13. Convergence towards NGN Today’s network is divided into: • Public Switched Telephone Network • Packet Switched Networks (LAN, WAN,…) • Cellular Mobile Networks Convergence is the process of interconnection of traditional switched circuit networks (PSTN and Mobile Networks) and packet-base networks that use IP (Internet Protocol). Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  14. 14. Convergence towards NGN Evolutional scenarios Migration scenarios of different types of networks platforms are based on the idea to integrate TDM (Time Division Multiplexing) and IP (Internet Protocol) platforms into one converged NGN platform (from the point of network infrastructure, as well as services). TDM IP NGN Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  15. 15. Convergence towards NGN Evolutional scenarios (continued) PSTN & Intelligent Networks Internet & Data Networks Cable Networks Wireless & Mobile Networks Internet Telephony Hybrid Networks VoIP Networks VoCATV GSM GPRS UMTS NGN Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  16. 16. Convergence towards NGN From Vertical Silos to Horizontal NGN Architecture Application Service Control Transport Access End Points Mobile Networks PSTN/ISDN Data/IP Networks Cable/Terrestrial TV Vertical Silo Architecture per service Services Horizontal Layered Multi-Service Architecture Existing and Newly Emerging Services Services & Network Control (QoS, Security, IP Mobility) Multi-Service IP Backbone Wireless Access Wireline Access Services Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  17. 17. Convergence towards NGN Comparing the Features of PSTN/IN, Internet, and NGN PSTN/IN Internet NGN Multimedia Services NO YES YES QoS support YES NO YES Network Intelligence YES NO YES Intelligent Terminal Equipment NO YES YES Integrated Supervision & Control YES NO YES Reliability High Low High Service Creation Complex ad-hoc Systematic Simplicity of Services use Medium High High Modularity Low Medium High Time of Service Introduction Long Short Short Openness of Architecture Small High High Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  18. 18. NGN Softswitch-Base Architecture Media Application Server Access Network PSTN / IN RTP RTCP VoIP IP / MPLS MGCP H.323 SIP Media Gateway Controller TDM RTP/RTCP Trunking Gateway (MGW) Access Gateway Server SIG T M Signaling Gateway SIP SIP MGCP H.248 MGCP H.323 SIP MGCP H.248 Media Gateway Controller SIP-T, BICC AG Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  19. 19. NGN Softswitch-Base Architecture Components M Media Gateway Call Agent Softswitch Controller Generally serves as components for controlling of communication relations of users and other network components; provides call routing, network signaling, billing, and other logical functions. Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  20. 20. NGN Softswitch-Base Architecture Components T Media Gateway Trunking gateways: interface between the PSTN/PLMN and VoIP Operate Residential within gateway: transport provide plane, traditional perform analog all function (RJ11) related interface to media to VoIP physical transport between different networks, media processing functions Access gateway: (transcoding, provide echo traditional cancellation, analog or jitter PBX managing), interface to VoIP tones processing Signaling network: and management provide of change information of signalization transport. systems between PSTN/PLMN to VoIP Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  21. 21. NGN Softswitch-Base Architecture Components Application Server Application server is implemented to perform functionalities specific to certain service, perform specialized service logic call control, also includes more functionalities in terms of user web interface, end-points management, etc. For example it can provide specific videoconferencing service, Call Center service or IP Centrex service. Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  22. 22. NGN Softswitch-Base Architecture Components Media Server Media server provides functionalities allow interaction between calling party and application using end-point device. It provides Media Resource Functions (tones detection, speech synthesis and recognition, compressions, media mixing, etc.) and Media Control Functions that control of media functions (voice message play management, conference bridge, fax message management, etc.) Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  23. 23. NGN Configuration and Topology INNI: Internal Network-Network Interface NNI: Network-Network Interface UNI: User Network Interface Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  24. 24. Conclusion  Other Architectures • IMS and entities (P-CSCF, I-CSCF,…) • TISPAN NGN • GSM • …  NGN Protocols • SIP (Session Initiation Protocol) • SDP (Session Description Protocol) • RTP (Real Time Transport Protocol) • ...  NGN Standards  Services and QoS Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran
  25. 25. Any Question? Thank You Havar Bathaee University of Tehran

 

NGN

 

a next generation network is a packet-based network that can be used for both telephony and data and that supports mobilility. Initially, the term Next Generation Network was used to refer to the transformation of the core network to IP. Sometimes a NGN is referred to as an all-IP network.

 

The ITU defined an NGN as:

“A Next Generation Network (NGN) is a packet-based network able to provide services including Telecommunication 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. ”

The NGN is characterized by the following fundamental aspects:

  • Packet-based transfer
  • Separation of control functions among bearer capabilities, call/session, and application/ service
  • Decoupling of service provision from network, and provision of open interfaces
  • Support for a wide range of services, applications and mechanisms based on service building blocks (including real time/ streaming/ non-real time services and multi-media)
  • Broadband capabilities with end-to-end QoS and transparency
  • Interworking with legacy networks via open interfaces
  • Generalized mobility
  • Unrestricted access by users to different service providers
  • A variety of identification schemes which can be resolved to IP addresses for the purposes of routing in IP networks
  • Unified service characteristics for the same service as perceived by the user
  • Converged services between Fixed/Mobile
  • Independence of service-related functions from underlying transport technologies
  • Compliant with all Regulatory requirements, for example concerning emergency communications and security/privacy, etc.

 

 

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