Patent ID: 6898191

Claim:
A digital radio for pseudo-duplex radio communication, comprising: signal transmission means for time division duplex signal transmission over a single radio channel; signal reception means for time division duplex signal reception over the said single radio channel; a controller adapted to derive a value of a source signal activity parameter (VAD) for the digital radio, the source signal activity parameter (VAD) indicating the likelihood of there being a source signal for transmission by the digital radio to a second digital radio over the said single radio channel; the controller being further adapted to derive a first value (VADDir 1 ) of a signal direction parameter (VADDir), the first value of the signal direction parameter (VADDir) being derived in dependence on both the value of the signal activity parameter (VAD) for the digital radio and a second value (VADDir 2 ) of the signal direction parameter (VADDir) received from the second digital radio; the controller being further adapted to receive the second value (VADDir 2 ) of the signal direction parameter (VADDir) over the said single radio channel from the second digital radio, and to transmit the first value (VADDir 1 ) of the signal direction parameter (VADDir) over the said single radio channel to the second digital radio; the controller being further adapted to select the proportions of time for transmission and reception in dependence on the first value (VADDir 1 ) of the signal direction parameter (VADDir).