Spectrum, Technology

1
Spectrum, Technology

• Unlicensed (802.11 LANs, Bluetooth, Cordless
  digital phones)
• Industrial, Scientific, Medical, ISM 2.4 GHz
• 2.4 2.4835 GHz
• Unlicensed National Information Infrastructure,
  UNII 5GHz
• 5.125-52.5 GHz, 5.25-5.35 GHz, 5.725-5.825 GHz
  (also 5.15-5.25
• Licensed (Wireless Phone/Data WANs Local
  Bi-Pass)
• Cellular (850 MHz) 824 894 MHZ
• Personal Communication Service (PCS, 1.9 GHz, or
  2 GHz)1.851.99 GHz
• Multichannel Multipoint Distribution Services
  (MMDS) 2.5 GHz - 2.7 GHz

2
Up and Coming WiMax

• Worldwide Interoperability for Microwave Access
  (WiMax)
• IEEE 802.16 (standard as of 1/03)
• Coined wireless broadband
• Fixed Wireless, Technology works at 10-60GHz
  range
• Task force in place to make it work in the
  2-11GHz range
• Use the MMDS frequency spectrum.
• Future upgrade use for mobile wireless,
  proposed as IEEE 802.20.
• WiMax shows promise as a "last mile" solution
  for bringing high-speed Internet access into
  homes--but it's still a few years away from
  general availability, according to an Intel
  executive.
• - Intel braves new world of WiMax, Jan. 21, 2004
• By Richard Shim , CNET News.com,
  http//zdnet.com.com/2100-1103_2-5144887.html
• Status Chips not yet available. Intel to begin
  shipping 2H04. Outside antennas expected 1H05.
  Indoor expected 2H05. Antennas for mobile
  devices expected 2006.
• Same source as above.

3
Up and Coming 3G

• Worldwide operability.
• High speeds 128Kbps moving 2 Mbps stationery.
• FCC reviewed several spectrum ranges for
  auctioning new licenses for 3G. Never resolved.
• PCS providers now offering 2.5G / 3G services in
  the PCS spectrum

4
Verizons 3G Service(PCS Spectrum)

• 79.99/mo unlimited
• BroadbandAccess service in San Diego, CA
  Washington D.C.
• Typical speeds of 300-500 Kbps with bursts up to
  2 Mbps speed declines with distance from cell
  site number of users may also affect maximum
  possible speed. Average upload speeds expected
  to be between 40 and 60 kbps.
• Wireless NationalAccess elsewhere
• 40-60 Kbps, bursting to 144 Kbps

Whats the difference, technically? Wireless
NationalAccess uses 1x technology, while
BroadbandAccess uses IxEV technology.
5
The Technology

• Qualcomms Glossary, 3G (http//www.cdmatech.com/r
  esources/glossary_full.jsp3g)
• The CDMA path to 3G is through CDMA2000, also
  known as "1X originally called 1xRTT, then on
  to 1xEV, and ultimately to 3x.
• The GSM path to 3G is through GPRS, then to EDGE,
  and ultimately to wideband CDMA (WCDMA).
• --------------------------------------------------
  ---------------------------------
• In the U.S., Verizon and Sprint use CDMA for
  their PCS networks (others use TMDA and/or GSM).
  
• GMU students participated in the
  Verizon/Lucent/Qualcomm 1xEVDO (1xEV Data Only)
  data trials last year.
• Provides data speeds up to 2.4Mbps, shared per
  tower. Upload speed is up to 153kbps.