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2/20/01 Ericsson - Sean Olson 1
Voice Over IP
Sean Olson <[email protected]>http://www.ericsson.com/mobileinternet/
2/20/01 Ericsson - Sean Olson 2
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
