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WLAN WIFI 无线网络相关术语

hostapd的默认配置文件里有大量说明: https://w1.fi/cgit/hostap/plain/hostapd/hostapd.conf

IEEE标准:

802.11a (5 GHz)
802.11b (2.4 GHz)
802.11g (2.4 GHz)
802.11p (5.9 GHz)
802.11ax (6 GHz)
802.11ad/ay (60 GHz)

WIFI的商品名

Wi-Fi 5 -> 802.11ac Wi-Fi 6 -> 802.11ax

802.11n (HT)

Higher Throughput (HT) rates.

  • Reducing the per-packet overhead in the MAC layer.
  • Allowing multiple MAC packets to be combined into a single PHY-layer burst.
  • Allowing (optionally) a more efficient LDPC encoder.
  • Allowing (optionally) a shorter guard interval (cyclic prefix) on the data symbols.
  • Increasing the number of subcarriers used in the default 20 MHz physical channel.
  • Providing an (optional) 40 MHz mode.
  • Using MIMO techniques to broadcast multiple data streams over a single frequency channel.

By combining these techniques, the goal is to increase the usable data transfer rate by a factor of 10.

802.11ac (VHT)

DFS

TPC

SRD

OFDM

WMM

ieee80211n