Interference aware transmission power control method and device for IEEE 802.11 based wireless network with nodes having a directional antenna

An interference-aware transmission power control method for wireless network nodes in a network having pair-wise active links, each having a directional antenna, comprising the steps of,

• for an individual node, for each active link of said individual node, an active link having a transmitter interface and a receiver interface:
• calculating a reduced transmitted power which cause a corresponding reduced received power, such that:
• (a) the transmitter interface and the receiver interface configure to maintain connectivity of the active link with the reduced transmitted power in the directional antenna between the transmitter interface and the receiver interface;
• (b) the reduced transmitted power does not create additional link-interference edges from any other active link, even if transmission power of the other active link is maintained, in the antenna direction between the transmitter interface of the other active link and the receiver interface;
• and
• (c) the reduced transmitted power does not create additional hidden nodes, such that a CSRange of the reduced transmitted power is still sufficient to inhibit transmission by any other interfering network node interface in the antenna direction between said any other interfering network node and the receiver interface.