Method and apparatus for transmitting and receiving radio signals in a wireless communication system
The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for receiving information on a number N of a code block group defined for one transport block from a base station through an upper layer signal, receiving a first transport block including a plurality of code blocks from the base station through a physical layer channel, and transmitting HARQ-ACK payload including HARQ-ACK information on the first transport block to the base station. Preferably, a code block-based CRC is attached to each of the code blocks, a transport block-based CRC is attached to the first transport block, and the HARQ-ACK payload includes a plurality of HARQ-ACK bits corresponding to M code block groups for the first transport block.
1. A method of transmitting control information by a device in a wireless communication system, the method comprising:
receiving information on a number M (M>1) of code block groups (CBGs) defined for one transport block through an upper layer signal;
receiving a first transport block (TB) including M CBGs through a physical layer channel; and
transmitting a Hybrid ARQ Acknowledgement (HARQ-ACK) payload including a plurality of HARQ-ACK bits corresponding to the M CBGs of the first TB,
wherein some of the M CBGs of the first TB each include ceiling (K/M) code blocks (CBs), and the rest of the M CBGs of the first TB each include flooring (K/M) CBs,
wherein the K (K>M) indicates a number of CBs of the first TB, the ceiling is an ascending function, the flooring is a descending function, and
wherein a respective first Cyclic Redundancy Check (CRC) is attached to each of the K CBs, and a second CRC is attached to the first TB.
2. The method of claim 1 , wherein the upper layer signal includes a Radio Resource Control (RRC) signal, and the physical layer channel includes a Physical Downlink Shared Channel (PDSCH).
3. The method of claim 1 , wherein a size of the HARQ-ACK payload is maintained as same based on the M during an HARQ process for the first TB.
4. The method of claim 1 , wherein, among the M CBGs of the first TB, each of first mod(K/M) CBGs includes ceiling (K/M) CBs, and each of last {M−mod(K/M)} CBGs includes flooring (K/M) CBs, and the mod is a modulo function.
5. The method of claim 1 , wherein in a state in which all CBG-based CRC check results for the first TB are ‘pass’ but a TB-based CRC check result is ‘fail’, all of a plurality of HARQ-ACK bits for the first TB in the HARQ-ACK payload indicate Negative Acknowledgement (NACK).
6. A device configured to operate in a wireless communication system, the device comprising:
at least one processor; and
at least one computer memory operably connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving information on a number M (M>1) of code block groups (CBGs) defined for one transport block through an upper layer signal,
receiving a first transport block (TB) including M CBGs through a physical layer channel, and
transmitting a Hybrid ARQ Acknowledgement (HARQ-ACK) payload including a plurality of HARQ-ACK bits corresponding to the M CBGs of the first TB,
wherein some of the M CBGs of the first TB include ceiling (K/M) code blocks (CBs), and the rest of the M CBGs of the first TB include flooring (K/M) CBs,
wherein the K (K>M) indicates a number of CBs in the first TB, the ceiling is an ascending function, the flooring is a descending function, and
wherein a respective first Cyclic Redundancy Check (CRC) is attached to each of the K CBs, and a second CRC is attached to the first TB.
7. The device of claim 6 , wherein the upper layer signal includes a Radio Resource Control (RRC) signal, and the physical layer channel includes a Physical Downlink Shared Channel (PDSCH).
8. The device of claim 6 , wherein a size of the HARQ-ACK payload is maintained as same based on the M during an HARQ process for the first TB.
9. The device of claim 6 , wherein, among the M CBGs of the first TB, each of first mod(K/M) CBGs includes ceiling(K/M) CBs, and each of last {M−mod(K/M)} CBGs includes flooring (K/M) CBs, and the mod is a modulo function.
10. The device of claim 6 , wherein in a state in which all CBG-based CRC check results for the first TB are ‘pass’ but a TB-based CRC check result is ‘fail’, all of a plurality of HARQ-ACK bits for the first TB in the HARQ-ACK payload indicate Negative Acknowledgement (NACK).
11. The device of claim 6 , further comprising: a radio frequency (RF) unit.
12. A method of receiving control information by a device in a wireless communication system, the method comprising:
transmitting information on a number M (M>1) of code block groups (CBGs) defined for one transport block through an upper layer signal;
transmitting a first transport block (TB) including M CBGs through a physical layer channel; and
receiving a Hybrid ARQ Acknowledgement (HARQ-ACK) payload including a plurality of HARQ-ACK bits corresponding to the M CBGs of the first TB,
wherein some of the M CBGs of the first TB include ceiling (K/M) code blocks (CBs), and the rest of the M CBGs of the first TB include flooring (K/M) CBs,
wherein the K (K>M) indicates a number of CBs of the first TB, the ceiling is an ascending function, the flooring is a descending function, and
wherein a respective first Cyclic Redundancy Check (CRC) is attached to each of the K CBs, and a second CRC is attached to the first TB.
13. The method of claim 12 , wherein the upper layer signal includes a Radio Resource Control (RRC) signal, and the physical layer channel includes a Physical Downlink Shared Channel (PDSCH).
14. The method of claim 12 , wherein a size of the HARQ-ACK payload is maintained as same based on the M during an HARQ process for the first TB.
15. The method of claim 12 , wherein, among the M CBGs of the first TB, each of first mod(K/M) CBGs includes ceiling (K/M) CBs, and each of last {M−mod(K/M)} CBGs includes flooring (K/M) CBs, and the mod is a modulo function.
16. A device for use in a wireless communication system, the device comprising:
at least one processor; and
at least one computer memory operably connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
transmitting information on a number M (M>1) of code block groups (CBGs) defined for one transport block through an upper layer signal;
transmitting a first transport block (TB) including M CBGs through a physical layer channel; and
receiving a Hybrid ARQ Acknowledgement (HARQ-ACK) payload including a plurality of HARQ-ACK bits corresponding to the M CBGs of the first TB,
wherein some of the M CBGs of the first TB include ceiling (K/M) code blocks (CBs), and the rest of the M CBGs of the first TB include flooring (K/M) CBs,
wherein the K (K>M) indicates a number of CBs of the first TB, the ceiling is an ascending function, the flooring is a descending function, and
wherein a respective first Cyclic Redundancy Check (CRC) is attached to each of the K CBs, and a second CRC is attached to the first TB.
17. The device of claim 16 , wherein the upper layer signal includes an Radio Resource Control (RRC) signal, and the physical layer channel includes a Physical Downlink Shared Channel (PDSCH).
18. The device of claim 16 , wherein a size of the HARQ-ACK payload is maintained as same based on the M during an HARQ process for the first TB.
19. The device of claim 16 , wherein, among the M CBGs of the first TB, each of first mod(K/M) CBGs includes ceiling (K/M) CBs, and each of last {M−mod(K/M)} CBGs includes flooring (K/M) CBs, and the mod is a modulo function.
20. The device of claim 16 , further comprising: a radio frequency (RF) unit.