
CSE5501: MOBILE & DISTRIBUTED COMPUTING SYSTEMS
Lecture 3: Wireless LANs
33
Local-Area Wireless
Local
Local
-
-
Area Wireless
Area Wireless
Local Area Network
Local Area Network
Technology
Technology
802.11 (FHSS) 2.4 GHz
802.11 (FHSS) 2.4 GHz
1 Mbps
1 Mbps
Freq. Hopped Spread Spectrum
Freq. Hopped Spread Spectrum
802.11 (DSSS) 2.4 GHz
802.11 (DSSS) 2.4 GHz
1 or 2 Mbps
1 or 2 Mbps
Direct Sequence Spread Spectrum
Direct Sequence Spread Spectrum
Hiperlan
Hiperlan
23.5 Mbps
23.5 Mbps
High Performance Radio LAN
High Performance Radio LAN
P802.11b (DSSS) 2.4 GHz
P802.11b (DSSS) 2.4 GHz
11 Mbps
11 Mbps
Direct Sequence Spread Spectrum
Direct Sequence Spread Spectrum
P802.11a 5 GHz
P802.11a 5 GHz
Initial
Initial
Shipment
Shipment
s
s
Initial
Initial
Shipments
Shipments
Final
Final
Specification
Specification
Specifications
Specifications
Approved
Approved
Initial Mobile
Initial Mobile
Shipments
Shipments
1999
1999
2000
2000
2001
2001
2002
2002
2003
2003
Q1
Q1
Q2
Q2
Q3
Q3
Q4
Q4
Q1
Q1
Q2
Q2
Q3
Q3
Q4
Q4
Q1
Q1
Q2
Q2
Q3
Q3
Q4
Q4
Q1
Q1
Q2
Q2
Q3
Q3
Q4
Q4
Q1
Q1
Q2
Q2
Q3
Q3
Q4
Q4
54 Mbps
54 Mbps
Direct Sequence Spread Spectrum
Direct Sequence Spread Spectrum
Materials from Andrew Seybold
Materials from Andrew Seybold
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-
Microsoft Exchange Conference 1999
Microsoft Exchange Conference 1999
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