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p2.802.11_overview

p2.802.11_overview - ± 902-928 MHz ± 2.4-2.5 GHz(FCC...

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bxyics 1 bxyics 1 A Typical Wireless Home Network bxyics 2 A Corporate Wireless Network bxyics 3 802.11 Adopted in 1997 by IEEE Defines MAC and PHY for a LAN with wireless connectivity
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bxyics 2 bxyics 4 Independent Basic Service Set (IBSS) Ad hoc network Peer to peer network bxyics 5 Infrastructure Basic Service Set BSS with an access point Basic Service Set Identifier (BSSID) Distribution system Service Set Identifier (SSID/ESSID) bxyics 6 Extended Service Set (ESS)
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bxyics 3 bxyics 7 Access Points Basic Functions Three operation modes Other network functions bxyics 8 Stations or client devices Wireless NIC Provide interface between the Data Link layer and the physical layer Types bxyics 9 Beacons Sent every 10-100 ms Includes SSID (sometime not) Channel Time stamp (sync) Supported rates Encryption
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bxyics 4 bxyics 10 Bandwidth ISM (Industrial, Scientific and Medical bands)
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