2/20/01Ericsson - Sean Olson1 Voice Over IP Sean Olson

2/20/01 Ericsson - Sean Olson 1

Voice Over IP

Sean Olson <[email protected]>http://www.ericsson.com/mobileinternet/

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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 26 b.

Ericsson

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Dynamic Growth in Mobile Internet

0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

1999 2000 2001 2002 2003 2004 2005

Mobile Internet

Fixed Internet

Subscribers (millions)

Forecast of Internet users worldwide

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Next Generation Multiservice Network

Telephony + Internet/data + Video/TV

Wireless/wireline access for data, telephony and cable TV:

User applicationsPortals and servers

Communications controlServers

ConnectivityBackbone network

At home On the move At the office

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A Network Picture

IP backbone

Access Access

ServicesServices

SIP

Bearer Services oriented

WireLineWireLine

Bearer Services oriented

WLanWLan

SIP

Bearer Services oriented

WireLineWireLine

TA?

WLanWLan

FW?

TA?

ServicesServices

3G Wireless3G WirelessFW?

3G Wireless3G Wireless

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Voice Over IP (VoIP)

Moving from Circuit Switched to Packet Convergence of Data and

TelecommunicationsNew Services, New ChallengesThe End of Black Phones?Voice as an Adjunct to DataTerminal, Personal, Service MobilitySeparation of Voice from Signalling

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Reference Models

OSI Internet

Physical

Data Link

Network

Transport

Session

Presentation

Application

Physical

Data Link

Network

Transport

Application

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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

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NextGen IP Infrastructure

IPv6 and IPv4QoS (RSVP, DiffServ, MPLS, …)NATP and FirewallsIPSecMobile IPVPNATM Backbone

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IPv6

128 bit addresses (FEDC:BA98:7654:3210:FEDC:BA98:7654:3210)

Anycast addressingLink-local and Site-local addressing“Classless” RoutingAggregatable addressesSupport for Multicasting, MobileIPAutoconfiguration

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IPSec

Provides integrity protection, authentication, and encryption of the IP payload

Part of IPv6 umbrella of standardsBecoming de-facto standard for IP

securityChanges dimensioning of IP network

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SCTP

Stream Control Transmission Protocol (RFC2960)

Potentially the next TCPMultihome with failover supportConnection-oriented datagram serviceMultiple streams per associationIntegrity protection (MAC)

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Session Initiation Protocol(SIP)

Signaling protocol for VoIPBased on HTTPIETF equivalent of H.323Provides true multimedia - not just

voiceSeparates signaling from bearerSeparates device from user

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Wireless Communications

High Latency (~ 120ms upper bound)High Bit Error RateUnequal Value of Data BitsPoint-to-Point, Point-to-Manypoint,

BroadcastQoS mechanisms essentialEncryption mechanisms mandatory

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Standards Bodies

IETF (Internet)3GPP (GSM)3GPP2 (CDMA)MWIF (Worldwide)ETSI (Europe, Telecom)ITU-T (International, Telecom)ANSI / TIA (North America)

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IETF

Internet Engineering Task ForceProvides Standards for DNS, IPv6,

DHCP, SIP, etc.Open to anyone!Simple Process: I-Ds, RFCshttp://www.ietf.orgParticipate through e-mail

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XoIP

Everything is dataIntelligence is in the endpointsCore network provides security, AAA, QoSNamespaces are globalFirewalls disappear …Multiple access networksIdentity is ephemeralMobile Ad-Hoc Networks (MANET)

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Learning More

http://www.ietf.orghttp://www.ericsson.com/

mobileinternethttp://www.cs.columbia.edu/siphttp://www.cisco.com

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Q & A