Patent ID: 7954032

Claim:
A method for transmitting a broadcast physical layer packet in a mobile communication system supporting multi-slot transmission and hybrid Automatic Repeat Request (H-ARQ), the method comprising: transmitting, by a controller, the broadcast physical layer packet according to a first transmission format for at least one first slot interval; and retransmitting, by the controller, the broadcast physical layer packet for at least one second slot interval using a second transmission format different from the first transmission format used in the first slot interval, wherein the first transmission format is a fixed transmission format and the second transmission format is a variable transmission format, wherein transmitting and retransmitting the broadcast physical layer packet respectively comprise transmitting and retransmitting through an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and wherein the controller varies at least one of the number of data tones, the number of pilot tones, and the number of guard tones in the OFDM symbol in the second slot interval at each retransmission.