w4 d1 mobile communication device technology
TRANSCRIPT
Mobile Communication
Device TechnologyCommunication Technology Theme
(Week 4 Day 1)
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Mobile Communication Device Technology
The 802.11 Family
• 802.11a
• 802.11b
• 802.11g
• 802.11n
• 802.11ac
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Mobile Communication Device Technology
802.11a
Introduced September 1999
Frequency Used 5 GHz
Maximum Speed 54 Mb per second
Maximum Distance 120 metres
Modulation Used OFDM
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Mobile Communication Device Technology
802.11b
Introduced September 1999
Frequency Used 2.4 GHz
Maximum Speed 11Mb/s
Maximum Distance 140 metres
Modulation Used DSSS
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Mobile Communication Device Technology
802.11g
Introduced June 2003
Frequency Used 2.4 GHz
Maximum Speed 54 Mb/s
Maximum Distance 140 metres
Modulation Used OFDM & DSSS
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Mobile Communication Device Technology
802.11n
Introduced October 2009
Frequency Used 2.4 GHz & 5 GHz
Maximum Speed 600 Mb/s
Maximum Distance 250 metres
Modulation Used OFDM
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Mobile Communication Device Technology
802.11ac
Introduced December 2013
Frequency Used 5 GHz
Maximum Speed 1 Gb/s
Maximum Distance 35 metres (indoors)
Modulation Used OFDM
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Mobile Communication Device Technology
802.16
Developed by the IEEE 802/LAN/MAN standards committee.Wireless standard for use with MANsKnown at WirelessMAN by the IEEE but WiMAX in its commercial form.Up to 1 Gb/s for fixed stationsDesigned as an alternative to DSL and cable for the ‘last mile’
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Mobile Communication Device Technology
Quick Quiz
MaxSpeed
MaxDistanc
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Frequency
802a
802b
802g
802n
802ac
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Mobile Communication Device Technology
Quick Quiz (Answers)
MaxSpeed
MaxDistanc
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Frequency
802a 54 Mb/s 120 metres
5 GHz
802b 11 Mb/s 140 metres
2.4 GHz
802g 54 Mb/s 140 metres
2.4 GHz
802n 600 Mb/s
250 metres
2.4 GHz5 GHz
802ac
1 Gb/s 115 metres
5 GHz