Transmit Power Control in IEEE 802.11 Cisco WLAN networks

RRM: TPC, CHD and DCA

It works tightly with CHD, Covergate Hole Detection, to optimize transmit power. TPC tends to minimize the transmit power and CHD to eliminate coverage holes by increasing it.

Another difference is that access points (AP) inputs that hints on transmit power to use.  Whereas in the case of CHD, wireless devices (WD) that inform about coverage hole issues.

In a multi-channel condition, TPC works also with DCA, Dynamic Channel assignment. DCA offers a channel diversity and a last resort solution to TPC that couldn’t find an optimized radio resource plan in a single-channel condition.

Cisco TPC comes into play in two flavors depending on design constraints: Coverage Optimal Mode,  TPCv1, or Interference Optimal Mode TPCv2.

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