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NGNNext Generation Network

Concepts

Havar BathaeeUniversity of Tehran

December 7, 2014

1AgendaIntroductionNGN DefinitionNGN StandardizationNGN Conceptual ModelConvergence Towards NGNNGN Softswitch-Base ArchitectureNGN Configuration and TopologyConclusionHavar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

2IntroductionToday, telephony, the Internet, and the cellular mobile networks continue to be different domains, each has its own protocols and services.PSTNINTERNETMOBILENGN

Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

OthersAll-IP Networkits most important protocols, the Transmission Control Protocol (TCP) and the Internet Protocol (IP), 3

Introduction General Idea

Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

One network transports all type of data and provide services (voice, data, all sorts of media) by encapsulating these into packets using TCP/IP.

NGNs are commonly built around the Internet Protocol (IP), and therefore the term all IP is also sometimes used to describe the transformation toward NGN.4Introduction History

Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

The realization of the idea for NGN has started in 2003 (Figure 3.3). In each standards bodyhas been organized a standard group dedicated to NGN.The ITU-T has started its work on NGN in 2003 by creating the so-called Joint RapporteurGroup on Next Generation Network (JRG-NGN), which targeted to study several main subjectssuch as: NGN requirements, the general reference model, NGN functional requirementsand functional architecture, and evolution to NGN (from existing telecommunication networksat that time). This group delivered two fundamental NGN recommendations: General overview of NGN (Y.2001 [2]); General principles and general reference model for NGN (Y.2011 [3]).The JRG-NGNwas formed from experts of ITU-T Study Group 13 (SG13), which is targetedto future networks, including cloud computing, mobile, and NGN.In 2004 the ITU-T Focus Group on Next Generation Network (FG-NGN) was established,which lasted for 1.5 years (until November 2005). Its main targetwas to accelerate the activities started by the JRG-NGN. In the period 20042005 several key aspects regarding the NGNwere addressed by this group, such as: functional architecture and mobility, QoS, control andsignaling aspects, service and security capabilities, the migration path from PSTN/ISDN networksto NGN, as well as future packet-based networks and their requirements. The work ofFG-NGN was published in proceedings in 2005 [3].From 2006 the work on NGN standardization within the ITU-T was transferred to the NextGeneration Network Global Standards Initiative (NGN-GSI), which is working on detailedstandards for NGN deployment by collaboration with different ITU-T Study Groups. Theestablished objectives and goals of NGN-GSI were to further strengthen the leading role ofITU-T among other standardization bodies involved with NGN, to coordinate work betweendifferent ITU-T Study Groups working on various NGN recommendations, and to produceglobal standards based on the telecommunications market needs (which are continuouslychanging and often cannot be precisely predicted).Since the start of the NGN standardization process in ITU many operators have started tomigrate to all-IP networks, including the telephony migration to VoIP with similar QoS, security,and signaling support as in PSTN. The PSTN transition to all-IP environment was themost important driver for NGN from the start, thus NGN release 1 was mainly focused toVoIP. However, since the realization of NGN is an evolutionary process and different operatorsand administrations will start it at different times, there is a need to have different approachesfor building a NGN or transition from PSTN and PLMN (which both have high investments,either is equipment or other resources such as frequency bands for mobile networks) towardthe NGN.5NGN DefinitionNGN 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

NGN Definition:ETSI :NGN is a concept of the defining and establishing of the networks, allowing a formal distribution of functionalities into separate layers and planes by using open interfaces, making it possible for the service providers and operators to create a platform which can be gradually developed thanks to creation, implementation and effective management of innovative services.

6NGN DefinitionUnified Global Networking PlatformPacket-Based NetworkProvides Telecommunication Services to UsersQoS-enabled Transport Technologies(Delay, Throughput, and Reliability)Services are Independent of Transport TechnologiesUnfettered Access for Users to Networks and ServicesGeneralized Mobility Which Allow Consistent and Ubiquitous Provision of Services to Users Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

CharacteristicsNGN 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.

73GPPNGN StandardizationKey PlayersITU-TITU Telecommunication Standardization SectorITU-TNGN-GSI

ATISNGN FG

ETSITISPANATISAlliance for Telecom. IndustryETSIEuropean Telecom. Standards Institute3GPP3rd Generation Partnership ProjectHavar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

NGN-GSI (Next Generation Networks Global Standards Initiative)

ATIS NGN force group

ETSI TISPAN: Telecom & Internet Conveged Services and protocols for advanced networks

8NGN StandardizationKey Players (continued)

Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

9NGN StandardizationProblemsWithin the NGN concepts the standardization institutions are still working on the following issues and problems:Existing networks migration towards NGNDevelopment in the field of access technologiesConnection of other networks to IP networksProvision of services and development of new onesInterworking in the area of addressingInterworking of signaling systemsRoaming a mobilityHavar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

10NGN Conceptual ModelAccess network layersTransport layerControl layerServices & applications layerNGNManagementlayer

Fixed, Data, Cable, Wireless fixed, Mobile, SatelliteTransmission Packet network, VOIP, Media gateways, Signalling gateway, Core Packet networkMGC, Softswitch, Call Agent, GatekeeperNGN applications and services, application server, features server, media serverAccess to NGNHavar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

The access layer provides the infrastructure, for example an access networkbetween the end user and the transport network. The access network can be bothwireless and fixed and it can be based on various transport media.The transport layer ensures the transport between the individual nodes (points)of the network, to which are connected access networks. It connects physicalelements deployed in the individual layers It also enables the transport of differenttypes of traffic, media (signaling, interactive data, real-time video, voicecommunication, etc.)The control layer includes the control of services and network elements. Thislayer is responsible for set-up/establishing, control and cancelling of themultimedia session. It ensures the control of sources as well, depending on theservice requirements. One of the fundamental NGN principles is the separation ofcontrol logic from the switching hardware.The service layer, which can be used to createmore complex and sophisticatoffers the basic service functionsed services and applications. It controls the progressof the service based on its logic.11In 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 layerManagement layer tasks:Resource management (capacity, ports, and physical elements) and QoS in access to the network and the transport networkVarious media processing, encoding, data transfer (information flows)Management of calls and connection. Management and interworking of all elements of the reference architectureService controlNGN Conceptual ModelHavar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

Convergence towards NGNTodays network is divided into:Public Switched Telephone NetworkPacket 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

As it has already been stated, the next generation networks are a vision ofa converged network, meetin

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