. . "In information theory, a relay channel is a probability model of the communication between a sender and a receiver aided by one or more intermediate relay nodes."@en . . . "4600"^^ . . . "In information theory, a relay channel is a probability model of the communication between a sender and a receiver aided by one or more intermediate relay nodes."@en . . "978466218"^^ . "Relay channel"@en . . . "3593309"^^ . . . . . . . . . . . . .