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Wireless Multimedia Delivery over 3G Networks

Wireless Multimedia Delivery over 3G Networks. Greg Leah C SC 461. 3G. third generation wireless services offers high data rate content delivery to mobile devices cellphones PDA’s enables multimedia applications such as: live TV video/audio streaming video conferencing web surfing.

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Wireless Multimedia Delivery over 3G Networks

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  1. Wireless Multimedia Delivery over 3G Networks • Greg Leah • C SC 461

  2. 3G • third generation wireless services • offers high data rate content delivery to mobile devices • cellphones • PDA’s • enables multimedia applications such as: • live TV • video/audio streaming • video conferencing • web surfing

  3. Cellular Technologies • all are different methods of sharing a radio channel • all have concept of multiple access – implies sharing available frequency range with multiple users

  4. Frequency Division Multiple Access (FDMA) • frequency is divided between users • each user is allocated a different carrier frequency of the radio spectrum

  5. Time Division Multiple Access (TDMA) • users share the same frequency by using alternating time slots

  6. Code Division Multiple Access (CDMA) • data is broken into uniquely identified packets and transmitted over multiple frequencies • uses unique codes to identify connections and reassemble messages • every user uses the entire spectrum all of the time • allows most efficient usage of frequency spectrum

  7. Wireless Services History • 1G • offered analog voice only • uses Frequency Division Multiple Access (FDMA) • offered data rates of approximately 9600 bps

  8. Wireless Services History • 2G • digital voice and digital data • digital data applications: text messaging, streaming audio, & electronic publishing • implemented circuit switching technology • uses TDMA (Time Division Multiple Access) and CDMA (Code Division Multiple Access) • peak data rate: 14.4 kbps

  9. Wireless Services History • migration from 2G to 2.5G to assist carriers with upgrading infrastructure transition to 3G • 2.5G • voice and data transmission • enhanced data rates and packet data services • adopted packet-switching technology • peak data rate: 115 kbps

  10. Wireless Services History • 3G • combination of circuit and packet switching technologies • high data rates in addition to voice transmission • able to achieve data rates between 307 kbps to 2.4 Mbps

  11. 3G Technology • Wideband Code Division Multiple Access (W-CDMA) • Code Division Multiple Access 2000 (CDMA2000) • Time Division-Synchronous Code Division Multiple Access (TD-SCDMA)

  12. Wideband Code Division Multiple Access (W-CDMA) • leading global 3G standard • 2 sub standards based on CDMA technology: • Freedom of Mobile Multimedia Access (FOMA) • world’s first commercial W-CDMA service • developed in Japan by NTT DoCoMo • Universal Mobile Telephone System (UMTS) • mainly used in countries that use GSM (Europe)

  13. CDMA2000 • second generation of CDMA digital cellular technology • outgrowth of 2G CDMA, but still backwards compatible • substandards: • CDMA2000 1x, CDMA2000 1xEV-DO, and CDMA2000 1xEV-DV • EV-DO → Evolution-Data-Only • EV-DV → Evolution-Data-Voice • main 3G technology used in Canada and the United States

  14. Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) • uses a combination of TDMA and CDMA • developed and used in China only in an attempt to develop home-grown technology and not be "dependent on Western technology" for 3G services

  15. Main Challenges • developing reliable protocols to ensure high data rate transmission to mobile devices • developing protocols for pervasive networks to allow handoff between heterogeneous network types

  16. Implementation • content providers all over the world have been rolling out 3G networks for a couple years now • in Canada: • Bell and Telus introduced 3G services in late 2005 • Rogers started offering live TV through MobiTV in April 2005

  17. 3G Handsets • worldwide drive to implement 3G networks is creating demand for more sophisticated handsets

  18. Panasonic 3G Handset

  19. Nokia 3G Handset

  20. Motorola’s Vodaphone 3G Handsets

  21. The Future: 4G • Japanese company NTT DoCoMo is testing 4G communication at 100 Mbps while moving, and 1 Gbps while stationary • plans to roll out in 2010 • will be based strictly on packet-switched technology only while 3G is a combination of packet- and circuit-switching

  22. The Future: 4G • pervasive networks • hypothetical concept where users can be handed off using heterogeneous wireless technologies • e.g. cellphone uses WiFi or WiMax when available, then hands off to UMTS or another cellular technology

  23. Why I think 3G is cool • video delivery to cellphones is a huge market • projections in multiple billions of dollars • mobile video conferencing is also a cool technology

  24. The End • questions?

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