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Voice Over IP

Voice Over IP. Sean Olson <sean.olson@ericsson.com> http://www.ericsson.com/mobileinternet/. Ericsson. A Truly Global Company. 100,000 employees and operations in 140 countries International operations for more than 100 years 50 R&D centers in 25 countries

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Voice Over IP

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  1. Voice Over IP Sean Olson <sean.olson@ericsson.com> http://www.ericsson.com/mobileinternet/ Ericsson - Sean Olson

  2. Ericsson A Truly Global Company • 100,000 employees andoperations in 140 countries • International operations for more than 100 years • 50 R&D centers in 25 countries • Listed on 8 stock exchanges (ERICY) • Net sales (’99): USD 26b. Ericsson - Sean Olson

  3. Dynamic Growth in Mobile Internet Forecast of Internet users worldwide Subscribers (millions) 2,000 1,800 1,600 1,400 1,200 1,000 Mobile Internet 800 600 400 Fixed Internet 200 0 1999 2000 2001 2002 2003 2004 2005 Ericsson - Sean Olson

  4. Next Generation Multiservice NetworkTelephony + Internet/data + Video/TV User applications Portals and servers Communications control Servers Connectivity Backbone network Wireless/wireline access for data, telephony and cable TV: At home On the move At the office Ericsson - Sean Olson

  5. A Network Picture Services Services SIP SIP Access Access WireLine WireLine WLan WLan TA? TA? 3G Wireless 3G Wireless FW? FW? Bearer Services oriented Bearer Services oriented Bearer Services oriented IP backbone Ericsson - Sean Olson

  6. Voice Over IP (VoIP) • Moving from Circuit Switched to Packet • Convergence of Data and Telecommunications • New Services, New Challenges • The End of Black Phones? • Voice as an Adjunct to Data • Terminal, Personal, Service Mobility • Separation of Voice from Signalling Ericsson - Sean Olson

  7. Application Presentation Application Session Transport Transport Network Network Data Link Data Link Physical Physical Reference Models OSI Internet Ericsson - Sean Olson

  8. VoIP Layers • Application (Call Control) - SIP, H.323, RSVP, HTTP, etc. • Transport - SCTP, TCP, UDP, UDP-lite, TLS, WTLS • Network - IPv6/IPv4 • Data Link/Physical - 10Mb Ethernet Ericsson - Sean Olson

  9. NextGen IP Infrastructure • IPv6 and IPv4 • QoS (RSVP, DiffServ, MPLS, …) • NATP and Firewalls • IPSec • Mobile IP • VPN • ATM Backbone Ericsson - Sean Olson

  10. IPv6 • 128 bit addresses (FEDC:BA98:7654:3210:FEDC:BA98:7654:3210) • Anycast addressing • Link-local and Site-local addressing • “Classless” Routing • Aggregatable addresses • Support for Multicasting, MobileIP • Autoconfiguration Ericsson - Sean Olson

  11. IPSec • Provides integrity protection, authentication, and encryption of the IP payload • Part of IPv6 umbrella of standards • Becoming de-facto standard for IP security • Changes dimensioning of IP network Ericsson - Sean Olson

  12. SCTP • Stream Control Transmission Protocol (RFC2960) • Potentially the next TCP • Multihome with failover support • Connection-oriented datagram service • Multiple streams per association • Integrity protection (MAC) Ericsson - Sean Olson

  13. Session Initiation Protocol(SIP) • Signaling protocol for VoIP • Based on HTTP • IETF equivalent of H.323 • Provides true multimedia - not just voice • Separates signaling from bearer • Separates device from user Ericsson - Sean Olson

  14. Wireless Communications • High Latency (~ 120ms upper bound) • High Bit Error Rate • Unequal Value of Data Bits • Point-to-Point, Point-to-Manypoint, Broadcast • QoS mechanisms essential • Encryption mechanisms mandatory Ericsson - Sean Olson

  15. Standards Bodies • IETF (Internet) • 3GPP (GSM) • 3GPP2 (CDMA) • MWIF (Worldwide) • ETSI (Europe, Telecom) • ITU-T (International, Telecom) • ANSI / TIA (North America) Ericsson - Sean Olson

  16. IETF • Internet Engineering Task Force • Provides Standards for DNS, IPv6, DHCP, SIP, etc. • Open to anyone! • Simple Process: I-Ds, RFCs • http://www.ietf.org • Participate through e-mail Ericsson - Sean Olson

  17. XoIP • Everything is data • Intelligence is in the endpoints • Core network provides security, AAA, QoS • Namespaces are global • Firewalls disappear … • Multiple access networks • Identity is ephemeral • Mobile Ad-Hoc Networks (MANET) Ericsson - Sean Olson

  18. Learning More • http://www.ietf.org • http://www.ericsson.com/mobileinternet • http://www.cs.columbia.edu/sip • http://www.cisco.com Ericsson - Sean Olson

  19. Q & A Ericsson - Sean Olson

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