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WiMAX @ UNE

WiMAX @ UNE. E11_A3 - Arts Lecture Theatre 3 from 1 to 2pm on Friday 29th February 2009 by Dr. Charles R. Watson School of Science & Technology University of New England, Armidale NSW 2351 URL: http://mcs.une.edu.au/~cwatson7/I/WiMAX.ppt. Overview.

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WiMAX @ UNE

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  1. WiMAX @ UNE E11_A3 - Arts Lecture Theatre 3 from 1 to 2pm on Friday 29th February 2009 by Dr. Charles R. WatsonSchool of Science & TechnologyUniversity of New England, Armidale NSW 2351 URL: http://mcs.une.edu.au/~cwatson7/I/WiMAX.ppt

  2. Overview • International 4G Standard established in most countries • perfectly suited for regional and rural areas • purchase and installation WiMAX technology is faster, simpler and cheaper than other solutions WiMAX @ UNE

  3. WiFi @ UNE WiMAX @ UNE

  4. Telstra Broadband is expensive WiMAX @ UNE

  5. Telstra Next-G • Next G Mobile Base Stations at • Armidale Exchange • Kelly’s Plains • University of New England • Little Duvall (commissioned June 2007) WiMAX @ UNE

  6. Australia is the sixth most expensive for Broadband WiMAX @ UNE

  7. Rural Disadvantage • Eliminating the "digital divide" that separates urban high-speed-users from rural have-nots • Providing the opportunity to participate in and prosper from the knowledge economy. • What's good for the city is good for the bush • Improved services in e-government, e-learning, e-health and e-business WiMAX @ UNE

  8. Applications for rural areas • WiMAX Backhaul • Content suitable for rural areas • User interface suitable for IT-illiterates • Precision agriculture • Environmental monitoring • Demonstrate best practice in regional communications research WiMAX @ UNE

  9. WiMAX • non-line-of-sight (NLoS) capability provides coverage despite the challenges of geography and the limited footprint of wireline. • Australia’s late adoption provides UNE with an opportunity to show leadership in the bush by piggybacking on overseas development • Intel Centrino 2 chip set is now available WiMAX @ UNE

  10. Cost Effective • Provides cost effective "last mile" connectivity to fibre node backbone • Unlicenced spectrum is owned by local council avoiding Telstra/Optus carrier costs • In Africa, WiMAX provides Internet and VOIP services faster and more affordably than wireline WiMAX @ UNE

  11. Coverage • Wide coverage - 50Km • Range can be enhanced in a rural setting by increasing EIRP (effective isotropic radiated power) to 25W • Ideal for remote isolated regions with no existing coverage • WiMAX suppies data bandwidth only, increasing the bandwidth without compromising voice service quality  WiMAX @ UNE

  12. GSM Time slot 0.577 ms Frame 4.6 ms 8 time slots per frame Frequency band 20 KHz Time Division Multiple Access (TDMA)

  13. IS-95 Orthogonal Walsh codes 64 codes (channels) One pilot channel Seven paging channels 55 traffic channels Each carrier 1.25 MHz Code Division Multiple Access (CDMA)

  14. American Mobile Phone System (AMPS) Total Bandwidth 25 MHz Each Channel 30 KHz Frequency Division Multiple Access (FDMA)

  15. OFDMA-TDMA Principles Orthogonal Frequency Division Multiple Access (OFDMA) Time Division Multiple Access (TDMA) Sub Channels are allocated in the Frequency Domain, and OFDM Symbols allocated in the Time Domain WiMAX @ UNE

  16. OFDM-FDMA (OFDMA) • The IEEE 802.16e/ WiMax use OFDMA as Multiple access technique • Bandwidth options 1.25, 5, 10, or 20 MHz • Entire bandwidth divided into 128, 512, 1024 or 2048 sub carriers • 20 MHz bandwidth with 2048 sub carriers has 9.8 KHz spacing between sub carriers

  17. Advantages of OFDMA • Multi-user Diversity • broadband signals experience frequency selective fading • OFDMA allows different users to transmit over different portions of the broadband spectrum (traffic channel) • Different users perceive different channel qualities, a deep faded channel for one user may still be favorable to others

  18. Advantages of OFDMA cont.. • Efficient use of Spectrum 4/3 Hz per symbol 6/5 Hz per symbol

  19. Advantages of OFDMA cont.. • Receiver Simplicity • It eliminates the intra-cell interference avoiding CDMA type of multi-user detection • Orthogonality of code destroyed by selective fading • Only FFT processor is required • Bit Error Rate performance is better only in Fading environment

  20. Smart Antennas • WiMAX II, 802.16m - 4G • Goal of 100 Mbit/s mobile and 1 Gbit/s fixed-nomadic bandwidth • Adaptive use of MIMO-AAS • Beamforming takes advantage of interference to change the directionality of the array • mobile multi-hop relay networking WiMAX @ UNE

  21. WiMAX MIMO RFIC WiMAX @ UNE

  22. WiMax (802.16e) WiMAX @ UNE

  23. Enhanced Multicast Broadcast Service on Mixed Carrier WiMAX @ UNE

  24. Exponential Storage Growth WiMAX @ UNE

  25. Wide Area Network WiMAX @ UNE

  26. GrangeNet WiMAX @ UNE

  27. Broadband market share by technology WiMAX @ UNE

  28. WAN Technologies Compared WiMAX @ UNE

  29. WAN Technologies Compared (continued) WiMAX @ UNE

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