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Telecommunications Essentials Chapter 10 Next-Generation Networks.

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Presentation on theme: "Telecommunications Essentials Chapter 10 Next-Generation Networks."— Presentation transcript:

1 Telecommunications Essentials Chapter 10 Next-Generation Networks

2 Broadband Growth Information demand Wideband applications Video streaming Networked gaming E-commerce Convergence Shift to machine-to-machine communication More microprocessors than people Bandwidth cost is dropping (more slowly now)Bandwidth cost is dropping

3 Bandwidth Growth The Bandwidth Report Wireless is expected to dominate China, India, Russia expect biggest increase Increases productivity (compared to dialup)

4 Business Class Services eCommerce VPNs Video conferencing Collaboration

5 Broadband Applications Entertainment Internet video/movies/TV/gaming Education Rich-media content delivery Wireless campus Research Labs LHC, Grid Computing,LHCGrid Computing Health Care Teleworking National Security

6 Digital Video DTV Reduced bandwidth requirements due to compression Nearly immune to interference Can become interactive

7 DTV Standards Convergence of broadcasting & computing Next generation of TV New features Multiple –windows Interactive viewing options 6x improvement in video quality CD quality sound May have to compete with webTV

8 International Standards ATSC - Advanced Television Systems CommitteeATSC Adopted by Canada & U.S. U.S. Analog switch-off date: February 17, 2009February 17, 2009 Canada: Aug. 31, 2011 DVB – Digital Video BroadcastingDVB Europe & Australia Similar to ATSC except for audio compression & transmission

9 ATSC DTV Standard VerticalHorizontal Aspect Ratio Frame RateScanning HDTV1080192016:930, 24progressive 1080192016:960interlaced 720128016:960, 30, 24progressive DTV4807044:360, 30, 24progressive 4806404:360, 30, 24progressive SDTV4807044:360interlaced 4806404:360interlaced

10 MPEG MPEG-1 Video CDs 1.5 Mbps MP3 audioMP3 MPEG-2 DVD and DTV MPEG-4 Object based encoding WMP, QuickTimeWMPQuickTime MPEG-7 Multimedia content MPEG-21 Software libraries for production and delivery of content

11 MPEG-2 & Bandwidth DVD – 10.8 MbpsDVD HDTV – 20 Mbps, Blu-RayHDTVBlu-Ray Video delivery requires: More sophisticated video compressionvideo compression Fiber to the X New generation of wireless equipment

12 Broadband Service Requirements Requirements High speed & capacity Bandwidth on demand Bandwidth reservation Support isochronous traffic Agnostic platforms Support for unicasting & multicasting QoS

13 Technology Enablers Erbium-doped fiber amplifiersfiber amplifiers DWDM Optical add/drop multiplexers, cross- connect switches, & routers HFC, FTTC, FTTHHFCFTTCFTTH Broadband wireless & satellite Intelligent networks, softswitches, & media gatewaysIntelligent networkssoftswitchesmedia gateways

14 Delay & Jitter ITU recommendations Maximum setup delay: 150 mSec Packet loss: < 1% Presently it is up to 40% Round trip latency: < 80 mSec Presently it is up to 1000 mSec

15 Next-Generation Networks

16 IP IP – a LAN protocol Connectionless Discards packets when congested Traditional routers cannot deliver service quality VoIP & streaming media require low latency & jitter (voice compression 30 – 50 mSec) Increase Bandwidth Short term solution IP Switching Long term solution

17 IP Switching Connection oriented Routes the first packet Switches the other packets Replaces Layer 3 hops with Layer 2 switching Enables: Voice, video, & graphics applications Objectives Scale economically Improve QoS Limitation Not enough QoS control

18 IP Multimedia System CSCF – Call Session Control Function HSS – Home Subscriber Services Designed for IPv6 mobile networks Adapted for IPv4 fixed services Ericsson Slide Show

19 ATM A WAN technique Connection oriented Provides real-time traffic management Supports CoS and QoS provisioning Supports voice, IP, frame relay, X.25 etc. Limitation Scaling problems A virtual circuit is required between every IP router Possible solutions Abandon a full-mesh architecture Migrate to MPLSMPLS

20 IP vs. ATM +- IP Pervasive at the desktop No QoS ATMCoS & QoSHigh cell overhead

21 Terabit Switch Routers Proprietary Backbone platform Article by Amit Singhal Single Chip Terabit Switch GlimmerGlass

22 Today’s Networks Facilities for each service category have been separately engineered

23 Current Broadband Architecture Current systems use overlay networksoverlay networks Access and transport functions are separated Adds capacity & service without disruption Problem High O&M costsO&M New services require new provision management & troubleshooting systems

24 Multiservice Network

25 Three Tier Architecture Outer – Broadband Access Customer service Middle – Intelligent Edge Protocol and data service integration Inner – High-Speed Core Core switches

26 Broadband Access Provides the end-user with a broadband link Class 5 local exchange DLC DSLAM IAD Remote access servers

27 Intelligent Edge Establishes QoS, authentication, authorization etc. Equipment type: MSPP VoIP, Media, & Trunking Gateways ATM switches IP routers & switches

28 Next-Gen Network Edge

29 Multipurpose Switch

30 Intelligent Edge Functions Broadband access Adaptation of native traffic Data concentration QoS mapping Service provisioning Encryption Accounting Address administration The Edge is becoming more intelligent and the network more dumb A reversal of the traditional PSTN

31 High-Speed Core Scalable Fast Dumb

32 Softswitch A software-based distributed switching & control platform No industry-standard definition China may be the first to develop an interoperable switch Ericsson

33 ATM Service CategoryATM Service Category (QoS) CBR- Constant bit rate Highest class of service Streaming media VBR – Variable bit rate Highest class of data service Adequate for real-time voice ABR – Available bit rate LAN interconnect UBR – Unspecified bit rate Text data, image transfer, messaging

34 IP Service Levels IntServ (Integrated Services)IntServ Bandwidth reservation Internet virtual circuits Three service classes Guaranteed Service Controlled Load Service Best-Effort Service DiffServ (Differentiated Services)DiffServ A CoS (Class of Service) model Prioritizes different data streams Cannot specify traffic control parameters

35 MPLSMPLS (Multi Protocol Label Switching) Uses local labels to identify: Traffic types Path Destination Supports bandwidth reservation Operates at Layer 2 Supports tunneling Issues between IETF and IP/MPLS ForumIETFIP/MPLS Forum

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