Wireless Networks

1
Wireless Networks

• Oleg Aulov - Distributed Operating Systems

2
Wireless Networks

• Wireless LAN
• Wireless MAN
• Wireless PAN

3
Wireless LAN

• Wi-Fi - 802.11 a/b/g/n
• DSRC - 802.11p (Vehicular DOT network - dedicated
  short range communications)
• Fixed Wireless Data

4
Fixed Wireless Data

• Fixed Wireless Data is a class of technologies
  used to connect two fixed locations (e.g.,
  buildings) with a radio or other wireless link,
  such as laser bridge. Usually Fixed Wireless Data
  is part of a Wireless LAN infrastructure. The
  purpose of a Fixed Wireless Data link is to
  enable data communications between the two sites
  or buildings. Fixed Wireless Data links are often
  a cost-effective alternative to leasing fiber or
  installing cables between the buildings.

5
DSRC

• Dedicated Short Range Communications is a short
  to medium range wireless protocol specifically
  designed for automotive use. It offers
  communication between the vehicle and roadside
  equipment. It is a sub-set of the
  RFID-technology.
• 5.9 GHz band (U.S.)
• Emergency warning system for vehicles
• Cooperative Adaptive Cruise Control
• Cooperative Forward Collision Warning
• Approaching emergency vehicle warning (Blue
  Waves)

6
Wireless MAN

• WiMAX (IEEE 802.16) - Worldwide Interoperability
  for Microwave Access
• HIPERMAN (European ETSI alternative)
• iBurst 802.20 (Mobile Broadband Wireless Access)
• EV-DO
• HSDPAHSUPA (UMTS)
• Mobitex (Blackberry)
• Canopy (Motorola)

7
WiMAX

• standards-based technology enabling the delivery
  of last mile wireless broadband access as an
  alternative to cable and DSL
• AP communication goes on a random interrupt basis
  and we face a problem of QoS with applicaions
  such as VOIP
• Miscnception WiMAX will deliver 70 Mbit/s over
  50 kilometers

8
iBurst

• The HC-SDMA interface operates on a similar
  premise as GSM or CDMA2000 for cellular phones,
  with hand-offs between HC-SDMA cells reportedly
  providing the user with a seamless wideband
  wireless experience even when moving at the speed
  of a car or train.
• Use adaptive array antennas to improve bandwidth
  utilizaion

9
Mobitex (Blackberry)

• OSI based packet switched data network developed
  in early 80s used by military, police, ambulance
  and firefighters.
• Emphasizes on reliability
• Two way pagers
• packet-switched, narrowband, data-only technology
  mainly for short burst data

10
Canopy

• Motorola technology
• Internet providers
• 2 to 40 miles PtMP, up to 124 miles PtP
• Line of Sight

11
EVDO and HSDPA

• EVDO up to 3.1 Mbit/s
• Sprint / Vrizon
• HSDPA speeds of 1.8, 3.6, 7.2 and 14.4 Mbit/s

12
Wireless PAN (802.15)

• Bluetooth
• ZigBee
• IrDA
• Wireless USB
• Wireless HD
• Wireless BAN

13
ZigBee

• IEEE 802.15.4
• Smaller and cheaper then Bluetooth
• Low data rate, long battery life, secure
  networking, longer range
• Headphones, sensors, industrial control

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WuzzBee - Wireless USB

• 480 Mbit/s at distances up to 3 meters and 110
  Mbit/s at up to 10 meters
• game controllers, printers, scanners, digital
  cameras, MP3 players, hard disks, flash drives,
  parallel video streams

15
Wireless HD

• standard for consumer electronics, will allow for
  uncompressed, digital transmission of HD video
  and audio signals
• theoretical data rates as high as 20 Gbit/s
  permitting to scale to higher resolutions, color
  depth, and range
• point-to-point, non line-of-sight (NLOS) at up to
  10 meters.

16
Wireless BAN
17
Sources Sited

• www.wikipedia.org
• www.zigbee.org
• www.mobitex.com
• path.berkeley.edu/dsrc/
• www.wimaxforum.org
• http//www.motorolaptp.com/
• http//motorola.canopywireless.com/support/library
  /
• http//www.redwoodwireless.com/
• www.usb.org/developers/wusb/
• www.wirelesshd.org/