+ * ``mcs`` (`Modulation and Coding Scheme <https://en.wikipedia.org/wiki/Link_adaptation>`_)
+ Roughly speaking, it defines the speed at which the access point is
+ exchanging data with all stations. It depends on its model and configuration,
+ and the possible values are listed for example on Wikipedia.
+ |br| By default, ``mcs=3``.
+ It is a property of the WiFi zone.
+ * ``nss`` (Number of Spatial Streams, or `number of antennas <https://en.wikipedia.org/wiki/IEEE_802.11n-2009#Number_of_antennas>`_)
+ defines the amount of simultaneous data streams that the AP can sustain.
+ Not all value of MCS and NSS are valid nor compatible (cf. `802.11n standard <https://en.wikipedia.org/wiki/IEEE_802.11n-2009#Data_rates>`_).
+ |br| By default, ``nss=1``.
+ It is a property of the WiFi zone.
+ * ``wifi_distance`` is the distance from the station to the access point. Each
+ station can have a specific value.
+ |br| By default, ``wifi_distance=10``.
+ It is a property of stations of the WiFi network.