1. UMTS Network Universal Mobile Telecommunications System
University of North Texas
CSCE 4520 Wireless Protocols
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2. UMTS Overview Universal Mobile Telecommunications System
3G phone technology
Sometimes marketed as 3GSM
Designed for media access on phones
Based on GSM air-interface
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3. UMTS Overview Uses Wideband Code Division Multiple Access (W-CDMA)
UMTS is a standard created for IMT-2000 (International Mobile Telecommunications-2000) by the ITU (International Telecommunication Union)
Soft Handoffs
Can connect with Packet or Circuit Switching
Current coverage
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4. Path to UMTS
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5. W-CDMA Developed by NTT DoCoMo Two modes of duplex:
Time division duplex
Frequency division duplex
Inter-cell asynchronous (packet) operation
Can do soft and hard handoffs
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6. UMTS Speed 384 kbps long range, 2 Mbps short range
Theoretically can go up to 11 Mbps.
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7. UMTS Speed
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8. UMTS Network Architecture
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9. UTRAN UMTS Terrestrial Radio Access Network UE - Node B - RNC - MSC
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10. UTRAN
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11. UMTS Spectrum
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12. Connection Sequence
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13. ATM Packet
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14. UMTS QoS Classes
Conversational class — Voice, video telephony, video gaming
Streaming class — Multimedia, video on demand, webcast
Interactive class — Web browsing, network gaming, database access
Background class — , short message service (SMS), file downloading
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15. UMTS Internet Europe’s Vodafone UMTS Internet Connection 1.4Mbps Down
384kbps Up
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16. S-UMTS (SDMB)
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17. S-UMTS Network
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18. S-UMTS
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19. UMTS Problems Requires more battery power
Can handoff UMTS to GSM, but not GSM to UMTS
Initial poor coverage
For video on demand and other bandwidth heavy services a Base Station needs to be set up every 1-1.5km. Unfeasible in rural areas.
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20. Questions
Describe the differences between UMTS network architecture and GSM/CDMA network architecture.
(Node B, RNC, …)
What are the applications of UMTS?
(Video, data, voice, internet, …)
How are data and voice connections different in UMTS?
(packet/circuit switching; priorities)
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21. References
Satellite Digital Multimedia Broadcasting. C. Selier, N. Chuberre, M.G. Françon, C. Nussli, P. Vincent, G. E. Corazza, A. Vanelli-Coralli. Alcatel, 2004.
Performance Estimation of Efficient UMTS Packet Voice Call Control. Gerry Foster, Maria Isabel Pous, Dirk Pesch, Amardiya Sesmun, Valerie Kenneally. IEEE 2002.
Multicast in 3G Networks: Employment of Existing IP Multicast Protocols in UMTS. Mariann Hauge, Øyvind Kure. ACM 2002.
Wikipedia: Universal Mobile Telecommunications System
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