Patent ID: 7590121

Claim:
A transmitter for unidirectionally transmitting a data stream of data packets over a unidirectional radio link including a receiver, the transmitter comprising: an input unit for inputting the data packets; a transmitter control unit connected to said input unit for receiving the data packets from said input unit, processing the data packets by inserting a predetermined test coding into each of the data packets, and generating a duplicate of each of the data packets, the respective duplicate including a type information item and an offset information item, said offset information item providing information on a time interval in which the duplicate data packet will follow its respective data packet; a transmitting unit connected to said transmitter control unit for receiving each data packet and its duplicate transmitter control unit and transmitting each data packet and its duplicate regularly in succession with a time offset between each data packet and its duplicate, the time offset between each data packet and its duplicate varying in accordance with a predetermined offset rule and said offset information item; and the offset information item being generated from a predetermined counting sequence.