Method of transmitting and receiving data channel for new radio and apparatus using the same
Provided is a method of transmitting and receiving a data channel for the next-generation/5G radio access network. The method may include: receiving setting information about a code block group (CBG) for retransmission of the data channel from a base station; and receiving downlink control information (DCI) including scheduling information about the data channel from the base station, wherein the DCI includes transmission direction information about the CBG.
1. A method of transmitting and receiving a data channel by a terminal, the method comprising:
receiving setting information about a code block group (CBG) for retransmission of the data channel from a base station; and
receiving downlink control information (DCI) comprising scheduling information about the data channel from the base station,
wherein the DCI comprises transmission direction information about the CBG,
wherein the DCI further comprises flushing direction information of one bit for indicating validity of data stored in a soft buffer of the terminal corresponding to the CBG to be retransmitted,
wherein the flushing direction information is set to zero when the stored data is valid, and the flushing direction information is set to one when the stored data is invalid,
wherein the flushing direction information included in the DCI is used to determine whether to combine the data stored in the soft buffer of the terminal and data retransmitted from the base station for decoding,
wherein the setting information about the CBG comprises information for directing a maximum number of CBGs per transmission block (TB),
wherein a number of bits in the transmission direction information about the CBG corresponds to the maximum number of CBGs per TB, and
wherein each bit in the transmission direction information about the CBG indicates whether or not the CBG is transmitted through the data channel.
2. The method according to claim 1 , wherein the setting information about the CBG is received from the base station through higher layer signaling.
3. The method according to claim 1 , wherein the transmission direction information about the CBG is directed by a bitmap configured with the number of bits corresponding to the maximum number of CBGs per TB.
4. The method according to claim 3 , wherein the number of bits in the bitmap is determined as one number of 2, 4, 6 and 8.
5. The method according to claim 3 , wherein each bit of the bitmap is set to 1 when the CBG directed by each bit is transmitted through the data channel, and each bit of the bitmap is set to zero when the CBG directed by each bit is not transmitted through the data channel.
6. A method of transmitting and receiving a data channel by a base station, the method comprising:
transmitting setting information about a code block group (CBG) for retransmission of the data channel to a terminal; and
transmitting downlink control information (DCI) comprising scheduling information about the data channel to the terminal,
wherein the DCI comprises transmission direction information about the CBG,
wherein the DCI further comprises flushing direction information of one bit for indicating validity of data stored in a soft buffer of the terminal corresponding to the CBG to be retransmitted,
wherein the flushing direction information is set to zero when the data is valid, and the flushing direction information is set to one when the data is invalid,
wherein the flushing direction information included in the DCI is used to determine whether to combine the data stored in the soft buffer of the terminal and data retransmitted from the base station for decoding,
wherein the setting information about the CBG comprises information for directing a maximum number of CBGs per transmission block (TB),
wherein a number of bits in the transmission direction information about the CBG corresponds to the maximum number of CBGs per TB, and
wherein each bit in the transmission direction information about the CGB indicates whether or not the CBG is transmitted through the data channel.
7. The method according to claim 6 , wherein the setting information about the CBG is transmitted to the terminal through higher layer signaling.
8. The method according to claim 6 , wherein the transmission direction information about the CBG is directed by a bitmap configured with the number of bits corresponding to the maximum number of CBGs per TB.
9. The method according to claim 8 , wherein the number of bits in the bitmap is determined as one number of 2, 4, 6 and 8.
10. The method according to claim 8 , wherein each bit of the bitmap is set to 1 when the CBG directed by each bit is transmitted through the data channel, and each bit of the bitmap is set to zero when the CBG directed by each bit is not transmitted through the data channel.
11. A terminal for transmitting and receiving a data channel, the terminal comprising:
a receiver configured to receive setting information about a code block group (CBG) for retransmission of the data channel from a base station, and receive downlink control information (DCI) comprising scheduling information about the data channel from the base station,
wherein the DCI comprises transmission direction information about the CBG,
wherein the DCI further comprises flushing direction information of one bit for indicating validity of data stored in a soft buffer of the terminal corresponding to the CBG to be retransmitted,
wherein the flushing direction information is set to zero when the data is valid, and the flushing direction information is set to one when the data is invalid,
wherein the flushing direction information included in the DCI is used to determine whether to combine the data stored in the soft buffer of the terminal and data retransmitted from the base station for decoding,
wherein the setting information about the CBG comprises information for directing a maximum number of CBGs per transmission block (TB),
wherein a number of bits in the transmission direction information about the CBG corresponds to the maximum number of CBGs per TB, and
wherein each bit in the transmission direction information about the CBG indicates whether or not the CBG is transmitted through the data channel.
12. The terminal according to claim 11 , wherein the setting information about the CBG is received from the base station through higher layer signaling.
13. The terminal according to claim 11 , wherein the transmission direction information about the CBG is directed by a bitmap configured with the number of bits corresponding to the maximum number of CBGs per TB.