Transmit Power Control in IEEE 802.11 Cisco WLAN networks

In general TPC processes these data:

  • RSSI, reported by WD or AP,
  • RRM Neighbor Messages, or OTA messages (Over the Air), 
  • Data from PHY and MAC on APs radio interfaces other than RRM radio messages,
  • Configured and associated to access points radio profiles parameters such as : min/max transmit power levels, third neighbor transmit power level threshold.

Depending on the implementation it could accept also these types of data :

  • CleanAir, which may be seen a spectrum analyzer added to new generation access points and that dynamically hints on radio interface condition mainly interference.
  • CCX, Cisco Client Extension, for the same purpose as Cleanair but at mobile devices (WD) level.

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