Establishing shared information in a network

A non-transitory machine-readable storage medium having instructions stored therein, which when executed by a processor causes the processor to perform operations that comprise:

• determining a first estimated characteristic of a communication channel between a first node and a second node based, at least in part, on at least one initial signal transmitted from the first node to the second node;
• transmitting a first signal from the first node to the second node, wherein at least a portion of the first signal is modulated with a first data sequence generated at the first node according to the first estimated characteristic;
• receiving a second signal at the first node from the second node, wherein at least a portion of the second signal is modulated with a second data sequence generated at the second node according to a second estimated characteristic of the communication channel, wherein the second estimated characteristic is determined based, at least in part, on at least one initial signal transmitted from the second node to the first node;
• and
• determining shared information at the first node based, at least in part, on at least a portion of the first data sequence and at least a portion of the second data sequence.

An device comprising:

• a network interface including a transmitter and a receiver;
• the receiver configured to receive signals from a communication medium;
• and
• the transmitter coupled with the receiver and configured to:
• determine a first estimated characteristic of a communication channel between a first node and a second node based, at least in part, on at least one initial signal transmitted from the first node to the second node, wherein the device is associated with the first node;
• transmit a first signal to the second node, wherein at least a portion of the first signal is modulated with a first data sequence generated at the first node according to the first estimated characteristic;
• receive a second signal from the second node, wherein at least a portion of the second signal is modulated with a second data sequence generated at the second node according to a second estimated characteristic of the communication channel, wherein the second estimated characteristic is determined based, at least in part, on at least one initial signal transmitted from the second node to the first node;
• and
• determine shared information based, at least in part, on at least a portion of the first data sequence and at least a portion of the second data sequence.