Hybrid ARQ system with data and control channel for packet data transmission

摘要

A hybrid ARQ method for packet data transmission in a mobile communication system wherein previously transmitted packets are combined with retransmitted packets, said packets being segmented (200) into a plurality of protocol data units PDUs, each being assigned a sequence number for identification purposes. According to the invention the sequence number is transmitted on a control channel (240) which is separate from the data channel for transmitting the PDUs, and the control channel includes an indicator for identifying each data packet.