Patent ID: 8312338

Claim:
A method for a receiver to transmit a response signal for a transmission signal from at least one transmitter in a communication system, the method comprising: receiving at least one data block from the at least one transmitter, the at least one data block grouped into at least one group and then transmitted by the at least one transmitter; checking whether the at least one data block contained in a corresponding group is successfully received per each group; and transmitting the response signal instructing a presence or non-presence of successful reception of the data block to the at least one transmitter by a specific transmission scheme selected from among a first scheme of transmitting the response signal per the data block, a second scheme of transmitting the response signal by including a group response signal for each group and a third scheme of transmitting an index of a data block response signal set per each group, wherein the second scheme comprises transmitting a single response signal for each group and the second scheme comprises: transmitting a single response signal for the group having a same result from said checking the at least one data block belonging to the corresponding group; and transmitting the respective response signal for each data block for the group having a different result from said checking the at least one data block belonging to the corresponding group, wherein, in the third scheme, the index instructs a specific combination of the response signal for the at least one data block in an index table as a set of combinations of the response signal for the at least one data block per each group, and wherein the index table includes combinations of the response signal for the at least one data block as many as the number of indexes decided according to a retransmission probability for the data block and the number of simultaneously processed blocks.