6610-l6- - Wireless Data Networks 1 Wireless Data Networks...

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1 Wireless Data Networks
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2 Wireless Data Networks Experiencing a tremendous growth over the last decade or so US wireless data revenue about $10B in 1Q 2009 Increasing mobile work force, luxury of tetherless computing, information on demand anywhere/anyplace, etc, have contributed to the growth of wireless data
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3 Wireless Network Types … Satellite networks e.g. Iridium (66 satellites), Globalstar (48 satellites) Wireless WANs/MANs e.g. CDPD, GPRS, EDGE, EV-DO, HSDPA Wireless LANs e.g. Georgia Tech’s LAWN Wireless PANs e.g. Bluetooth headsets Wireless mesh networks e.g. SFO mesh network Ad-hoc networks e.g. Emergency relief, military Sensor networks E.g. Duck island sensor network
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4 Wireless Local Area Networks Probably the most widely used of the different classes of wireless data networks Characterized by small coverage areas (~200m), but relatively high bandwidths (upto 50Mbps currently, close to 150Mbps with n) Examples include IEEE 802.11 networks and Infrared networks
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5 WLAN Topology Distribution Network Mobile Stations Access Point Static host/Router
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6 Wireless WANs Large coverage areas of upto a few miles radius Support significantly lower bandwidths than their LAN counterparts (upto a few hundred kilobits per second) Examples: CDPD, RAM, GPRS, EDGE, EV-DO, HSDPA
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7 WAN Topology
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8 WWAN Generations 1G (Past) AMPS, TACS: No data 2G (Past/Present) IS-136, GSM: <10Kbps circuit switched data 2.5G (Present, Immediate Past) GSM-GPRS, GPRS-136: <100Kbps packet switched 3G (Present, Immediate Future) IMT-2000: HSDPA,EV-DO <2Mbps packet switched 4G (Immediate Future, Future) 20-40 Mbps!!
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9 Satellite Networks Till recently satellite networks used only for fixed earth stations to communicate (with satellites being geo- stationary) With the deployment of LEO (low earth orbit satellites),
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This note was uploaded on 12/14/2009 for the course ECE 6610 taught by Professor Staff during the Fall '08 term at Georgia Tech.

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6610-l6- - Wireless Data Networks 1 Wireless Data Networks...

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