STREAMED RADIO COMMUNICATION WITH ARQ AND SELECTIVE RETRANSMISSION OF PACKETS IN BURSTS

摘要

A system for streaming data packets, comprises a source device (2) having a radio transceiver (10), and a receiving device (4) having a radio transceiver (14). The source device (2) is configured to receive or generate a stream of data packets at a stream rate and to transmit, by radio, a succession of data frames, each data frame comprising a successive set of one or more data packets (22a) from the stream that have not previously been transmitted. The receiving device (4) is configured to receive a data frame and to determine whether the one or more data packets (22a) in the data frame have been correctly or incorrectly received and to transmit by radio an acknowledgement message (22c) indicating that one or more of the data packets (22a) has been correctly received and/or is configured to transmit by radio an acknowledgement message indicating that one or more of the data packets has been incorrectly received. The source device (2) is also configured such that, if the source device (2) determines that a data packet (22a) has not been correctly received by the receiving device, the source device retransmits the data packet (24b) in a subsequent data frame along with one or more data packets (24a) from the stream that have not previously been transmitted. The source device (2) is further configured such that, if the source device does not receive an acknowledgement message (24c) within an acknowledgement period after transmitting a data frame, the source device (2) retransmits the one or more data packets (26b) from the data frame in one or more subsequent data frames along with respective one or more data packets (26a) from the stream that have not previously been transmitted.