Different Wi-Fi Protocols and Data Rates [wifi的速录表]

Different Wi-Fi Protocols and Data Rates [wifi的速录表]

IEEE 802.11 Wi-Fi protocol summary

802.11ax (Wi-Fi 6)

802.11ac wave2

802.11ac wave1

802.11n

802.11g

• Released in 2003.
• Data rates with varying modulation types: 6, 9, 12, 18, 24, 36, 48 and 54 Mbps; can revert to 1, 2, 5.5, and 11 Mbps using DSSS and CCK.
• Orthogonal frequency-division multiplexing (OFDM) with 52 subcarrier channels; backwards compatible with 802.11b using DSSS and CCK.
• Three non-overlapping channels in industrial, scientific, medical (ISM) frequency band at 2.4 GHz.

802.11a

• Released in 1999.
• Data rates with varying modulation types: 6, 9, 12, 18, 24, 36, 48 and 54 Mbps.
• Orthogonal frequency-division multiplexing (OFDM) with 52 subcarrier channels.
• 12 non-overlapping unlicensed national information infrastructure (UNII) channels in 5 GHz frequency band.

802.11b

• Released in 1999.
• Data rates with varying modulation types: 1, 2, 5.5 and 11 Mbps.
• High-rate direct-sequence spread spectrum (HR-DSSS).
• Three non-overlapping channels in industrial, scientific, medical (ISM) frequency band at 2.4 GHz.

Legacy 802.11

• Released in 1997.
• Two raw data rates of 1 and 2 Mbps.
• Frequency hopping spread spectrum (FHSS) or direct-sequence spread spectrum (DSSS).
• Three non-overlapping channels in industrial, scientific, medical (ISM) frequency band at 2.4 GHz.
• Originally defined carrier sense multiple access with collision avoidance (CSMA-CA).