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IEEE 802.3u IEEE
802.11 91
(Canarsie) RF-CBTC
5
RF-CBTC FCC IEEE-802.11b
FCC 2.4 GHz IEEE-802.11a
5GHz (WCDMA)
(OFDMA) IEEE 802.11a 6 9 12 18 24 36 48
54Mbps 802.11b 5.5Mbps 11Mbps
CBTC IEEE 1404
IEEE 1455
IEEE 1489
(American Society for Testing and Materials ASTM) 90
8 24 IEEE 802.11a/RA(Road Access)
(Intelligent Transportation System) [18]
(ATC)
[5]
