CPC H04W 12/041 (2021.01) [H04L 27/2636 (2013.01); H04W 12/0431 (2021.01); H04W 12/06 (2013.01)] | 20 Claims |
1. A method comprising:
transmitting, by a first communication node, a first communication via a first communication channel, an encryption key being generated in a system, the system including the first communication node, a second communication node and a relay node wherein the relay node includes a first antenna, wherein:
the first communication channel is between the first communication node and the first antenna of the relay node; and
the first communication includes a first training packet;
receiving, by the relay node, the first communication; and in response to receiving the first communication, estimating the first communication channel;
transmitting, by the second communication node, a second communication via a second communication channel wherein:
the second communication channel is between the second communication node and the first antenna of the relay node; and
the second communication includes a second training packet;
receiving, by the relay node, the second communication; and in response to receiving the second communication, estimating the second communication channel;
generating, by the relay node, a first transmission;
transmitting, by the relay node, the first transmission signal via the first communication channel and the second communication channel;
determining, by the first communication node, a first received signal from the first communication channel and the first transmission signal;
determining, by the second communication node, a second received signal from the second communication channel and the first transmission signal;
generating, by the first communication node, a first instance of the encryption key based on the first received signal;
generating, by the second communication node, a second instance of the encryption key based on the second received signal, wherein:
the first transmission signal is generated based on a setting that the first received signal at an antenna of the first communication node is equal to the second received signal at an antenna of the second communication node.
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