Method and apparatus for transmitting data based on grant free in wireless communication system
A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT) are provided. The system and method provides for receiving, from a base station, downlink control information (DCI) including information on a hybrid automatic repeat request (HARQ) process number, identifying at least one grant free resource corresponding to the information on the HARQ process number, and releasing the at least one grant free resource based on the information. The disclosure discloses a grant-free based data transmission method in a wireless communication system that may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a message including a plurality of grant free resource configurations, the message configuring a correspondence between a grant free resource configuration and hybrid automatic repeat request (HARQ) process number information;
receiving, from the base station, first downlink control information (DCI) including the HARQ process number information;
identifying grant free resource configurations among the plurality of grant free resource configurations, the grant free resource configurations corresponding to a value of the HARQ process number information; and
releasing grant free resources for the grant free resource configurations based on a value of redundancy version information, a value of modulation and coding scheme information, and a value of frequency domain resource assignment information included in the first DCI.
2. The method of claim 1 , further comprising:
receiving, from the base station, second DCI including the HARQ process number information;
identifying at least one grant free resource configuration among the plurality of grant free resource configurations based on a value of the HARQ process number information included in the second DCI; and
activating at least one grant free resource corresponding to the at least one grant free resource configuration based on the second DCI,
wherein the at least one grant free resource corresponding to the at least one grant free resource configuration is activated, based on a value of redundancy version information included in the second DCI.
3. The method of claim 1 , wherein the grant free resource includes a downlink semi-persistent scheduling (DL SPS) physical downlink shared channel (PDSCH) or an uplink (UL) grant type 2 physical uplink shared channel (PUSCH).
4. The method of claim 1 , wherein the first DCI is validated, in case that a cyclic redundancy check (CRC) bit of the first DCI is scrambled with a configured scheduling radio network temporary identifier (CS-RNTI), and new data indicator (NDI) field in the first DCI for an enabled transport block is set to 0.
5. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a message including a plurality of grant free resource configurations, the message configuring a correspondence between a grant free resource configuration and hybrid automatic repeat request (HARQ) process number information; and
transmitting, to the terminal, first downlink control information (DCI) including the HARQ process number information,
wherein grant free resources for grant free resource configurations are released based on the first DCI, and the grant free resource configurations among the plurality of grant free resource configurations correspond to a value of the HARQ process number information, and
wherein the grant free resources are released based on a value of redundancy version information, a value of modulation and coding scheme information, and a value of frequency domain resource assignment information included in the first DCI.
6. The method of claim 5 , further comprising:
transmitting, to the terminal, second DCI including the HARQ process number information,
wherein at least one grant free resource corresponding to at least one grant free resource configuration identified based on a value of the HARQ process number information included in the second DCI is activated based on the second DCI, and
wherein the at least one grant free resource corresponding to the at least one grant free resource configuration is activated, based on a value of redundancy version information included in the second DCI.
7. The method of claim 5 , wherein the grant free resource includes a downlink semi-persistent scheduling (DL SPS) physical downlink shared channel (PDSCH) or an uplink (UL) grant type 2 physical uplink shared channel (PUSCH).
8. The method of claim 5 , wherein the first DCI is validated, in case that a cyclic redundancy check (CRC) bit of the first DCI is scrambled with a configured scheduling radio network temporary identifier (CS-RNTI), and new data indicator (NDI) field in the first DCI for an enabled transport block is set to 0.
9. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit or receive a signal; and
a controller configured to:
receive, from a base station, a message including a plurality of grant free resource configurations, the message configuring a correspondence between a grant free resource configuration and hybrid automatic repeat request (HARQ) process number information,
receive, from the base station, first downlink control information (DCI) including the HARQ process number information,
identify grant free resource configurations among the plurality of grant free resource configurations, the grant free resource configurations corresponding to a value of the HARQ process number information, and
release grant free resources for the grant free resource configurations based on a value of redundancy version information, a value of modulation and coding scheme information, and a value of frequency domain resource assignment information included in the first DCI.
10. The terminal of claim 9 , wherein the controller is further configured to:
receive, from the base station, second DCI including the HARQ process number information,
identify at least one grant free resource configuration among the plurality of grant free resource configurations based on a value of the HARQ process number information included in the second DCI, and
activate at least one grant free resource corresponding to the at least one grant free resource configuration based on the second DCI,
wherein the at least one grant free resource corresponding to the at least one grant free resource configuration is activated, based on a value of redundancy version information included in the second DCI.
11. The terminal of claim 9 , wherein the grant free resource includes a downlink semi-persistent scheduling (DL SPS) physical downlink shared channel (PDSCH) or an uplink (UL) grant type 2 physical uplink shared channel (PUSCH).
12. The terminal of claim 9 , wherein the first DCI is validated, in case that a cyclic redundancy check (CRC) bit of the first DCI is scrambled with a configured scheduling radio network temporary identifier (CS-RNTI), and new data indicator (NDI) field in the first DCI for an enabled transport block is set to 0.
13. A base station in a wireless communication system, the base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
transmit, to a terminal, a message including a plurality of grant free resource configurations, the message configuring a correspondence between a grant free resource configuration and hybrid automatic repeat request (HARQ) process number information, and
transmit, to the terminal, first downlink control information (DCI) including the HARQ process number information,
wherein grant free resources for grant free resource configurations are released based on the first DCI, and the grant free resource configurations among the plurality of grant free resource configurations correspond to a value of the HARQ process number information, and
wherein the grant free resources are released based on a value of redundancy version information, a value of modulation and coding scheme information, and a value of frequency domain resource assignment information included in the first DCI.
14. The base station of claim 13 , wherein the controller is further configured to:
transmit, to the terminal, second DCI including the HARQ process number information,
wherein at least one grant free resource corresponding to at least one grant free resource configuration identified based on a value of the HARQ process number information included in the second DCI is activated based on the second DCI, and
wherein the at least one grant free resource corresponding to the at least one grant free resource configuration is activated, based on a value of redundancy version information included in the second DCI.
15. The base station of claim 13 , wherein the grant free resource includes a downlink semi-persistent scheduling (DL SPS) physical downlink shared channel (PDSCH) or an uplink (UL) grant type 2 physical uplink shared channel (PUSCH).
16. The base station of claim 13 , wherein the first DCI is validated, in case that a cyclic redundancy check (CRC) bit of the first DCI is scrambled with a configured scheduling radio network temporary identifier (CS-RNTI), and new data indicator (NDI) field in the first DCI for an enabled transport block is set to 0.