Base station device, and terminal device for retransmitting group of unit data

1. A base station device comprising:

a storage that stores a plurality of pieces of identification information each of which corresponds to any of a plurality of groups, each of the plurality of groups indicating unit data subject to retransmission out of predetermined number of unit data included in transmission data to be transmitted to a terminal device, the plurality of groups including a first group to which a first number of pieces of unit data belong and a second group to which a second number of pieces of unit data belong, the second number of pieces of unit data being larger than the first number of pieces of unit data, the first group including first unit data included in the predetermined number of unit data, the second group including the first unit data and a second unit data included in the predetermined number of unit data, wherein the plurality of groups include a group in which 0 pieces of unit data are included, a group in which number larger than 0 and smaller than the predetermined number of unit data are included, and a group in which the predetermined number of unit data are included;

a receiver that receives, from the terminal device, identification information included in the plurality of pieces of identification information and corresponding to transmission data transmitted to the terminal device;

a communication controller that determines a retransmission group among the plurality of groups by referring to the storage; and

a transmitter that transmits all pieces of unit data included in the determined retransmission group that is determined by the communication controller, to the terminal device.

2. The base station device according to claim 1 , wherein

the base station device notifies, to the terminal device, of a mixed state of unit data subject to retransmission and unit data of new transmission that are included in the transmission data to be transmitted to the terminal device by a predetermined control channel.

3. A base station device comprising:

a storage that stores a pattern of decoding result of predetermined number of unit data included in reception data that is received from a terminal device, and a plurality of pieces of identification information each of which corresponds to any of a plurality of groups, each of the plurality of groups indicating unit data subject to retransmission out of the predetermined number of unit data, the plurality of groups including a first group to which a first number of pieces of unit data belong and a second group to which a second number of pieces of unit data belong, the second number of pieces of unit data being larger than the first number of pieces of unit data, the first group including first unit data included in the predetermined number of unit data, the second group including the first unit data and a second unit data included in the predetermined number of unit data, wherein the plurality of groups include a group in which 0 pieces of unit data are included, a group in which number larger than 0 and smaller than the predetermined number of unit data are included, and a group in which the predetermined number of unit data are included;

a processor that determines whether decoding of each unit data included in reception data received from the terminal device succeeds, that refers to the storage based on the pattern of decoding result of each unit data to generate identification information corresponding to the pattern of decoding result; and

a transmitter that transmits the identification information generated by the processor to the terminal device.

4. A terminal device comprising:

a storage that stores a plurality of pieces of identification information each of which corresponds to any of a plurality of groups, each of the plurality of groups indicating unit data subject to retransmission out of predetermined number of unit data included in transmission data to be transmitted to a base station device, the plurality of groups including a first group to which a first number of pieces of unit data belong and a second group to which a second number of pieces of unit data belong, the second number of pieces of unit data being larger than the first number of pieces of unit data, the first group including first unit data included in the predetermined number of unit data, the second group including the first unit data and a second unit data included in the predetermined number of unit data, wherein the plurality of groups include a group in which 0 pieces of unit data are included, a group in which number larger than 0 and smaller than the predetermined number of unit data are included, and a group in which the predetermined number of unit data are included;

a receiver that receives, from the base station device, identification information included in the plurality of pieces of identification information and corresponding to transmission data transmitted to the base station device;

a communication controller that determines a retransmission group among the plurality of groups by referring to the storage; and

a transmitter that transmits all pieces of unit data included in the determined retransmission group that is determined by the communication controller, to the base station device.

5. The terminal device according to claim 4 , wherein

the terminal device notifies, to the base station device, of a mixed state of unit data subject to retransmission and unit data of new transmission that are included in the transmission data to be transmitted to the base station device by a predetermined control channel.

6. The base station device according to claim 1 , wherein the pieces of unit data are code blocks.

7. The terminal device according to claim 4 , wherein the pieces of unit data are code blocks.