Notes for Wifi Lab

BSS set to 1

This attribute identifies the BSS to which the WLAN MAC belongs. In case of "Auto Assigned", all WLAN MACs in each subnet belong to the same BSS (i.e. the subnets define the borders of the BSSs in the network).

If this attribute is used (i.e. set to a value different than "Auto Assigned"), then it should be configured globally for all the WLAN nodes/interfaces in the network.

For WLAN MACs, whose roaming functionality is enabled, this attribute identifies only their initial BSSs. They may associate with other BSSs later during the simulation.

AP Functionality to enable

Can be used to assign the MAC as the access point of its BSS and to enable the access point functionality in the MAC by setting its value to "Enabled".

Some notes about access points:

i) Within a BSS only one or zero MAC can be an access point.

ii) BSSs that need to establish connections with other networks (i.e. EBSSs) have to have access points.

iii) In BSSs that are not connected to other networks (i.e. IBSSs), existence of an access point will cause additional protocol overhead.

iv) BSSs that deploy PCF (Point Coordination Function) have to have an access point.

v) A WLAN MAC serving at a bridge/switch port has to be an access point.

vi) A WLAN MAC serving at an interface of a router has to be an access point unless it is a part of a WLAN backbone established among routers.

Transmit Power set to 0.003

Specifies the transmit power of the STA in Watts. Note that no limits are imposed upon the value of this attribute.

In the United States:

When using omni-directional antennas having less than 6 dB gain in mobile WLAN scenarios, the FCC rules require EIRP to be 1 watt (1,000 milliwatts) or less. The EIRP limitations for fixed, point-to-point systems that use directive antennas with at least 6 dBi gain is 4 watts.