UMTS NetworkUMTS NetworkUniversal Mobile Universal Mobile

Telecommunications Telecommunications SystemSystem

University of North TexasUniversity of North Texas

CSCE 4520 Wireless ProtocolsCSCE 4520 Wireless Protocols

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UMTS OverviewUMTS Overview

Universal Mobile Universal Mobile Telecommunications SystemTelecommunications System

3G phone technology3G phone technology Sometimes marketed as 3GSMSometimes marketed as 3GSM Designed for media access on Designed for media access on

phonesphones Based on GSM air-interfaceBased on GSM air-interface

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UMTS OverviewUMTS Overview

Uses Wideband Code Division Multiple Uses Wideband Code Division Multiple Access (W-CDMA)Access (W-CDMA)

UMTS is a standard created for IMT-2000 UMTS is a standard created for IMT-2000 (International Mobile Telecommunications-(International Mobile Telecommunications-2000) by the ITU (International 2000) by the ITU (International Telecommunication Union)Telecommunication Union)

Soft HandoffsSoft Handoffs Can connect with Packet or Circuit Can connect with Packet or Circuit

SwitchingSwitching Current coverageCurrent coverage

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Path to UMTSPath to UMTS

CDMA

GSM

TDMA

PHS (IP-Based)

64 Kbps

GPRS

115 Kbps

CDMA 1xRTT

144 Kbps

EDGE

384 Kbps

cdma20001X-EV-DV

Over 2.4 Mbps

W-CDMA (UMTS)

Up to 2 Mbps

2G2.5G

2.75G 3G

1992 - 2000+2001+

2003+

1G

1984 - 1996+

2003 - 2004+

TACS

NMT

AMPS

GSM/GPRS

(Overlay) 115 Kbps

9.6 Kbps

9.6 Kbps

14.4 Kbps/ 64 Kbps

9.6 Kbps

PDC

Analog Voice

Digital Voice

Packet Data

IntermediateMultimedia

Multimedia

PHS

TD-SCDMA

2 Mbps?

9.6 Kbps

iDEN

(Overlay)

iDEN

Source: U.S. Bancorp Piper Jaffray

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W-CDMAW-CDMA

Developed by NTT Developed by NTT DoCoMoDoCoMo

Two modes of duplex:Two modes of duplex:• Time division duplexTime division duplex• Frequency division Frequency division

duplexduplex Inter-cell asynchronous Inter-cell asynchronous

(packet) operation(packet) operation Can do soft and hard Can do soft and hard

handoffshandoffs

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UMTS SpeedUMTS Speed 384 kbps long range, 2 Mbps short range384 kbps long range, 2 Mbps short range Theoretically can go up to 11 Mbps.Theoretically can go up to 11 Mbps.

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UMTS SpeedUMTS Speed

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UMTS Network ArchitectureUMTS Network Architecture

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UTRANUTRAN

UMTS Terrestrial Radio Access NetworkUMTS Terrestrial Radio Access Network UE - Node B - RNC - MSC UE - Node B - RNC - MSC RNCRNC

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UTRANUTRAN

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UMTS SpectrumUMTS Spectrum

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Connection SequenceConnection Sequence

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ATM PacketATM Packet

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UMTS QoS ClassesUMTS QoS Classes

Conversational classConversational class — Voice, video — Voice, video telephony, video gaming telephony, video gaming

Streaming classStreaming class — Multimedia, — Multimedia, video on demand, webcast video on demand, webcast

Interactive classInteractive class — Web browsing, — Web browsing, network gaming, database access network gaming, database access

Background classBackground class — E-mail, short — E-mail, short message service (SMS), file message service (SMS), file downloading downloading

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UMTS InternetUMTS Internet

Europe’s Europe’s Vodafone UMTS InternVodafone UMTS Internet et ConnectionConnection

1.4Mbps Down1.4Mbps Down 384kbps Up384kbps Up

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S-UMTS (SDMB)S-UMTS (SDMB)

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S-UMTS NetworkS-UMTS Network

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S-UMTSS-UMTS

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UMTS ProblemsUMTS Problems

Requires more battery powerRequires more battery power Can handoff UMTS to GSM, but not Can handoff UMTS to GSM, but not

GSM to UMTS GSM to UMTS Initial poor coverageInitial poor coverage For video on demand and other For video on demand and other

bandwidth heavy services a Base bandwidth heavy services a Base Station needs to be set up every 1-Station needs to be set up every 1-1.5km. Unfeasible in rural areas.1.5km. Unfeasible in rural areas.

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QuestionsQuestions

1.1. Describe the differences between UMTS Describe the differences between UMTS network architecture and GSM/CDMA network network architecture and GSM/CDMA network architecture.architecture.

(Node B, RNC, …)(Node B, RNC, …)

2.2. What are the applications of UMTS?What are the applications of UMTS? (Video, data, voice, internet, …)(Video, data, voice, internet, …)

3.3. How are data and voice connections different in How are data and voice connections different in UMTS?UMTS?

(packet/circuit switching; priorities)(packet/circuit switching; priorities)

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ReferencesReferences Satellite Digital Multimedia BroadcastingSatellite Digital Multimedia Broadcasting. C. Selier, N. . C. Selier, N.

Chuberre, M.G. Françon, C. Nussli, P. Vincent, G. E. Corazza, Chuberre, M.G. Françon, C. Nussli, P. Vincent, G. E. Corazza, A. Vanelli-Coralli. Alcatel, 2004.A. Vanelli-Coralli. Alcatel, 2004.

Performance Estimation of Efficient UMTS Packet Voice Call Performance Estimation of Efficient UMTS Packet Voice Call ControlControl. Gerry Foster, Maria Isabel Pous, Dirk Pesch, . Gerry Foster, Maria Isabel Pous, Dirk Pesch, Amardiya Sesmun, Valerie Kenneally. IEEE 2002.Amardiya Sesmun, Valerie Kenneally. IEEE 2002.

Multicast in 3G Networks: Employment of Existing IP Multicast in 3G Networks: Employment of Existing IP Multicast Protocols in UMTSMulticast Protocols in UMTS. Mariann Hauge, Øyvind Kure. . Mariann Hauge, Øyvind Kure. ACM 2002.ACM 2002.

Wikipedia: Universal Mobile Telecommunications System Wikipedia: Universal Mobile Telecommunications System http://en.wikipedia.org/wiki/Universal_Mobile_Telecommunichttp://en.wikipedia.org/wiki/Universal_Mobile_Telecommunications_Systemations_System

http://www.umtsworld.comhttp://www.umtsworld.com