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Internet Telephony: Technology Standards & Business

Internet Telephony: Technology Standards & Business. Maurizio Dècina Politecnico di Milano Convegno CNIPA Tecnologie Voice over IP come opportunità per la PA Roma, March 17, 2005. Networked Applications. Email, Fax, Telephony,. , Videoconferencing, Television,…. E-games, Web Browsing,.

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Internet Telephony: Technology Standards & Business

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  1. Internet Telephony:Technology Standards & Business Maurizio Dècina Politecnico di Milano Convegno CNIPA Tecnologie Voice over IP come opportunità per la PA Roma, March 17, 2005

  2. Networked Applications Email, Fax, Telephony, , Videoconferencing, Television,… E-games, Web Browsing, Videostreaming,… Interactive Education, Interactive Television, Financial Services,… Interoperability (Middleware) Name Servers, Security, Privacy, Directories, Electronic Money,... Distributed Computing, Transportable Programs & Intelligent Agents Internetworking TCP/UDP end-to-end transport IP DiffServ & IntServ Flows Interconnection Telecom Services: POTS, ISDN, ATM, Wireless,… Television Services: CATV, Digital Video Broadcasting, DTT, … Data Pipes: Modem: POTS, ISDN, DSL, Cable,… Data: LAN, X.25, Frame Relay,… Leased Line: T1/E1, T3/E3, SONET/SDH,… Open Networking Architecture M. DECINA: "Internet e l’infrastruttura globale dell’informazione" (Internet and the Global Information Infrastructure), Notiziario Tecnico Telecom Italia, vol. 6, n. 2, Ottobre 1997. CNIPA VoIP, Rome, March 17, 2005

  3. Voice over IP Packets CNIPA VoIP, Rome, March 17, 2005

  4. 3 Faces of Convergence Convergence Communications Convergence Fixed to Mobile Convergence Broadcast to Unicast Convergence Source: M. Dècina, 2004 CNIPA VoIP, Rome, March 17, 2005

  5. Network Environment InternetApplication Servers Wired Access Internet Application Platforms Mobility, Location, Connection & Control Servers FTTx Broadband Gateway xDSL+ Service Environment LRE Wireless Access Internet RSU RSU BTS 2G/3G+ IP Backbone Mobility Gateway Intelligent Edge PSTN/ISDN Media Gateway AP Wi-Fi/WiMAX+ Source: M.Dècina, 1999, updated 2003 Full IP Network CNIPA VoIP, Rome, March 17, 2005

  6. Broadband Access: the Bandwidth Gap 10G/40G Bandwidth 10/100/1000 E1 Lines Metro Metro LAN WAN Edge Core ADSL ADSL2 ADSL2+ FTTx WiEth 2-4 Mb/s 4-8 Mb/s 25 Mb/sx000 Mb/s X00 Mb/s Existing Copper Fiber Wireless CNIPA VoIP, Rome, March 17, 2005

  7. Wi-Fi Access Point IAD IAD STB Residential Broadband Access IncumbentULL site DSLAM • TRIPLE PLAY SERVICES over DSL • Telephony Services • Internet Access (up to 20 Mbit/s) • Live TV, VoD, and Video Streaming • Videocommunication CNIPA VoIP, Rome, March 17, 2005

  8. One device for home personal management of multimedia entertainment and information appliances User – friendly interface for the entire family Remote Control Input: DVB-T Cable – SAT Analog TV Internet (VoD – Napster, ESPN, Sonic, etc.) Feature Video: MPEG-2, dvr-ms, XVID & DIVX v3/v5 Audio Format: Wav, MP3, WMA Web browsing: Internet Explorer 6 Shared Internet Access Windows Media Center http://www.microsoft.com/windowsxp/mediacenter CNIPA VoIP, Rome, March 17, 2005

  9. Evolving Wireless Communications UltraWideBand 802.15.3 Bluetooth 802.15.1 CABLE REPLACEMENT ZigBee 802.15.4 PAN Wi-Fi 802.11b 802.11a/g/n HOME, OFFICE PUBLIC ACCESS WLAN LIMITED MobileFi 802.20 WiMAX 802.16a/e CITY, SUBURBS Range Mobility WMAN GPRS GSM UMTS EDGE COUNTRY, REGION WIDE HSDPA ED FULL WAN 1 kbit/s 10 kbit/s 100 kbit/s 1 Mbit/s 10 Mbit/s 100 Mbit/s 1 Gbit/s Bit Rate Source: M. Dècina, 2004 CNIPA VoIP, Rome, March 17, 2005

  10. MobileFi, aka 802.20, vs. 3G Source: Guy Pujolle, 2003 CNIPA VoIP, Rome, March 17, 2005

  11. 3 Faces of Internet Telephony Internet Telephony Internet Phones ASP VoIP Carrier Phones NGN VoIP Wireless Phones Wi-Fi VoIP Source: M. Dècina, 2004 CNIPA VoIP, Rome, March 17, 2005

  12. Telephony/Internet Transition2002-2012 Next Generation Internet IP v6 SIGNALLING SS-7 SIP 2 Billion+ Wired & Wireless Telephone Users 2 Billion+ Wired & Wireless Internet Users SOFT SWITCH MEDIA GATEWAYS circuits packets POTS, ISDN, GSM, UMTS,.. POTS, ISDN, DSL, FFTx,… UMTS,.WiFi,.WiMAX.. @ Mid Transition2007 Source: M. Dècina, 2002 CNIPA VoIP, Rome, March 17, 2005

  13. NGN Voice - Architectural Transition Interworking functions Class 5 Replacement, offloading functions User equipment Class 4 Replacement functions • SGW: converts IP signalling to PSTN/ISDN signalling • TGW: converts IP data flow to PCM • SBC: interconnects two VoIP network via IP • TDM switch: Call controll & Call routing towards the PSTN/PLMN network • AGW: encapsulates user’s signalling on IP and converts PCM to IP data flow • SGW: converts IP signalling to PSTN/ISDN signalling • TGW: converts IP data flow to PCM • POTS, PABX: generates user signalling, tx and rx user voice data • SOFTSWITCH: controls call routing & call set-up for CL 4/5 replacement • DIRECTORIES: advanced routing information IN & Multimedia service platform functions CNIPA VoIP, Rome, March 17, 2005

  14. Skype p2p Internet Telephony • 29 m users, 85 m dowloads • Proprietary SW, POTS quality, strong privacy • Free PC-to-PC calls • 1 m users of “SkypeOut”: PC-to-Phone 170 Countries March 2005 CNIPA VoIP, Rome, March 17, 2005

  15. PC Telephony Public PC Telephony Multiparty conference Address book, Finder Centralized Directory Click2Dial Mail-to-Speak Integration with Microsoft Outlook Presence Instant Messaging Chatting, SMS, MMS and EMS Videomessaging Videocommunication Nomadic access (safe individual connection from Everywhere) Web Telephony Features CNIPA VoIP, Rome, March 17, 2005

  16. Microsoft Passport Digital Identity, Microsoft Active Directory, Microsoft Windows Media Center, … Microsoft Live Communications Server Uses SIP based Telephony, as part of the Instant Messaging Service, and includes telephony capabilities, IM, notification, conferencing, messaging and presence functionality a desktop “dashboard” to provides access to functions and administration methods of integrating directly with business applications, and a range of mobility capabilities Microsoft Live Communications Server CNIPA VoIP, Rome, March 17, 2005

  17. User Agent Client (UAC) End systems Send SIP requests User Agent Server (UAS) Listens for call requests Prompts user or executes program to determine response User Agent UAC + UAS Request Response Media SIP Entities – Multimedia over the Internet • Redirect Server • “Network” server; redirects users to try other server • Proxy Server • “Network Server” Proxies request to another server Can “fork” request to multiple servers, creating a search tree • Registrar • receives registrations regarding current user locations SIP Redirect Server Location Service SIP Proxy 2 3 5 4 6 1 7 11 12 10 SIP Proxy SIP Proxy 13 8 SIP Client 14 9 SIP Client (User Agent Server) Source: H.Schulzrinne, 1999 CNIPA VoIP, Rome, March 17, 2005

  18. Internet DNS AOR to Contact Address ENUM query Phone number to reach any device on IP or PSTN SIP-1 SIP-2 Gateway Internet TDM PSTN Presence, phone number or URL to reach any device on IP or PSTN Switch PSTN IP communications are integrated with applications SIP - Beyond Voice CNIPA VoIP, Rome, March 17, 2005

  19. Survivable Remote Gateway Communications Equality Converged Network Solutions Main site Remote site 1 Multi-Media Mobile Working SIP SERVER WAN Remote site 2 Voice Specialty WiFiIP, TDM, analog Survivable Remote Gateway PSTN Converged CNIPA VoIP, Rome, March 17, 2005

  20. Service Content IP Network Broadcast Fixed Mobile Personal Digital Environment User Converged Services & Devices CNIPA VoIP, Rome, March 17, 2005

  21. Asp 2 PROVIDER QUALIFICATI LISTINO SERVIZI Asp 1 Provider 1 IP BE 2Mbps x€ IP BE 100 Mbps y€ …. Provider 2 IP HQ 2Mbps k€ IP HQ 100 Mbps z€ Provider 1 Provider 2 Provider 3 … Internet qualificata RUPAR Internet PAC PAL PAC ISP Locale PAL RUPAR PAC ISP Regionale PAL RUPAR ISP Nazionale Asp 3 TRIESTE T MILANO VENEZIA TORINO GENOVA BOLOGNA FIRENZE ANCONA 3 PERUGIA L’AQUILA ROMA CAMPOBASSO Struttura di gestione della sicurezza BARI NAPOLI Cittadini e imprese CAGLIARI CATANZARO PALERMO Struttura di gestione della qualità Sistema Pubblico di Connettività - SPC Fonte: CNIPA, 2003 CNIPA VoIP, Rome, March 17, 2005

  22. Rete Internazionale delle PA - RIPA Fonte: CNIPA, 2004 CNIPA VoIP, Rome, March 17, 2005

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