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3G Wireless

3G Wireless. Tanuj Gilja Keith Douglas. Introduction. Imagine the possibilities of connectivity! Scenarios: Traveler from New York to Tokyo Insurance appraiser at the scene of a natural disaster Paramedics capturing visuals of a victim’s injuries. Evolution of Wireless Systems.

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3G Wireless

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  1. 3G Wireless Tanuj Gilja Keith Douglas

  2. Introduction • Imagine the possibilities of connectivity! • Scenarios: • Traveler from New York to Tokyo • Insurance appraiser at the scene of a natural disaster • Paramedics capturing visuals of a victim’s injuries

  3. Evolution of Wireless Systems • Radio telephony during World War I • Wireless telephones in late 1940’s • Provided only basic half-duplex voice • Used analog technology • Evolved into full-duplex 1G systems in the 1960’s

  4. From 1G to 3G…- 1G - • Started in the early to mid 1960’s offering simple wireless voice services based on analog technology • Were very limited in capacity and did not extend across geographic areas • Systems using 1G : AMPS, TACS, and NMT

  5. From 1G to 3G…- 2G - • Developed in Europe and the US to provide better voice quality, higher capacity as well as lower power consumption • Offer support for simple non-voice services like SMS (simple messaging service) • 2G technologies do not interoperate • Difficult roaming between countries using different systems • Cannot meet subscriber demands for new, faster non-voice services on the move

  6. What is 2.5G Wireless? • Also known as Interim Generation • GPRS (General Packet Radio service) & EDGE (Enhanced Data rate for GSM Evolution) • Provides options for higher data rate while building on existing 2G systems • GPRS -> 171.2 kbps theoretical max bit rate • EDGE -> 384 kbps bit rate

  7. 3G Wireless Systems • 3G Wireless Systems are the new generation of systems that offer high bandwidth and support digital voice along with multimedia and global roaming. • Globally, different systems are being used, so, to migrate to globally acceptable systems, numerous standardization activities were carried out and three systems emerged: W-CDMA, CDMA2000, and TD-SCDMA

  8. 3G System Capabilities

  9. 3G System Capabilities ….

  10. The Road to 3G 2.5G 3G 2G

  11. Comparison of Generations

  12. What is W-CDMA? • Insert Parameters of WCDMA table here

  13. W-CDMA……..cont.

  14. More on 3G… • CDMA – Multi-Carrier (CDMA2000) • Uses 3.6864 Mcps which is 3 x 1.2288 Mcps that was used for the old CDMA one. They both use a 1.25 MHz channel and this effectively translates into 5MHz bandwidth (3.6864 x 1.25). • CDMA – TDD (Ultra TDD & TD-SCDMA • Used only in China

  15. CDMA2000 Evolution • Voice Data up to 14.4 Kbps • Voice Data up to 115 Kbps • 2x increases in voice capacity upto 307 kbps* packet data on a single (1.25 MHz) carrier • First 3G system for any technology worldwide • Optimized, very high-speed data (Phase 1) • Up to 2.4Mbps* packet data on a single (1.25 MHz) carrier. • Integrated voice and data (Phase 2); up to 3.09 Mbps

  16. Comparison of Transmission Times

  17. Applications Using 3G • Education • Virtual schools • On-line science lab • On-line library • On-line language labs • Training • Communication services • Video telephony • Video conference • Personal location (GPS)

  18. Applications Using 3G… • Business services • Mobile office • Narrowcast business TV • Virtual workgroups • Expertise on tap • Finance services • Virtual banking • On-line billing • Universal USIM and credit card • Entertainment • Audio on demand • Games • Video clips • Virtual sightseeing

  19. 3G / WLAN Integration • Why Integrate ? • To have access to high-bandwidth access where WLAN coverage is offered, while accessing wide area coverage of 3G at other places. • Problems : - • Continuity of Sessions. • Security.

  20. Implementing 3G and WLAN • Architecture - Functionalities include reuse of 3G subscription, network selection, 3G system based authentication, authorization and security using SIM/USIM card - WLAN access will rely on existing 820.11 standards

  21. Implementing 3G and WLAN • Security – Problem in WLANs • Not too much of a problem in 3G, as the 3G Wireless component of the integration provides the necessary security features.

  22. Implementing 3G and WLAN • Tightly coupled - uses a 3G core network to access WLAN • Loosely coupled (preferred) - uses a WLAN gateway to directly access the internet

  23. Key Parameters of 3G and 4G Systems

  24. Conclusion • 3G technologies promise to deliver a lot and are slowly being put into effect. • We have already started seeing the early features of 3G technologies being implemented in our phones, i.e., the video phones in the market. • It remains to be seen how much of the promised features and applications are actually implemented in today’s economy. • However, they have been slow in coming in. Let’s see what the future holds…

  25. REFERENCES We are thankful to : - Books / Periodicals • IEEE Communication Magazine – November 2003, A number of articles on 3G/WLAN Integration. • Alex Lightman with William Rojas, ‘Brave New Unwired World: The Digital Big Bang and the Infinite Internet’, J. Wiley & Sons, c2002. • Clint Smith, Daniel Collins, ‘3G Wireless Networks’, McGraw-Hill, c2002. • John R. Vacca, ‘Wireless Broadband Networks Handbook – 3G, LMDS & Wireless Internet’, McGraw-Hill, 2001. • Jiangzhou Wang, Tung-Sang Ng, editors, ‘Advances in 3G Enhanced Technologies for Wireless Communications’ , Artech House Publishers, c2002. • Vijay K. Garg, ‘Wireless Network Evolution – 2G to 3G’, Prentice Hall PTR, 2002. • Ramjee Prasad, Werner Mohr, Walter Konhauser, ‘Third Generation Mobile Communication Systems’, Artech House Publishers, 2000. • Morgan Stanley, Inc Report on Wireless Technology, June 10, 2002 • Andrew S. Tannenbaum, ‘Computer Networks’, Prentice Hall PTR, 2003.

  26. REFERENCES • Websites • About/Cellphones <http://cellphones.about.com/library/glossary/bldef_3g_wireless.htm> • White Paper on ‘WCDMA’, InterDigital, Inc. <http://www.interdigital.com/tech_products_wcdma.shtml> • www.3g-generation.com • www.fcc.gov • www.cdg.org • www.3gsm.org • www.3g-newsroom.com

  27. Two Questions for Exam • 1 – Name two 3G Wireless Systems? • 2 – What is the Data Rate for 3G Wireless Systems

  28. The Answers • 1 – Name two 3G Wireless Systems? • WCDMA • CDMA-2000 • TD-CDMA • 2 – What is the Data Rate for 3G Wireless Systems? • 2 Mbps

  29. Thank You! Any questions ?

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