Method and device for transmitting and receiving signal in wireless communication system
A method and device for transmitting and receiving a signal in a wireless communication system, according to one embodiment of the present invention, perform a 2-step or 4-step random access process in a shared spectrum. In order to transmit a PUSCH corresponding to an RAR of the 4-step random access process or a fallback-RAR of the 2-step random access process, a channel access type for the PUSCH is determined on the basis of a specific field of an RAR grant in the RAR.
1. A method for transmitting and receiving a signal by a user equipment (UE) operating in a wireless communication system, the method comprising:
transmitting a message A including a physical uplink shared channel (PUSCH);
receiving a message B based on the message A; and
transmitting a physical uplink control channel (PUCCH) on a PUCCH resource based on the message B;
wherein the PUCCH includes hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information for the Message B,
wherein based on the HARQ-ACK information being transmitted on the PUCCH with shared spectrum channel access, a channel access type for the PUCCH resource for the shared spectrum channel access is indicated based on a specific field of a success random access response (RAR) in the message B, and
wherein based on the HARQ-ACK information being transmitted on the PUCCH with non-shared spectrum channel access, the specific field of the success RAR is reserved.
2. The method of claim 1 , wherein the success RAR is a UE-specific message.
3. The method of claim 1 , wherein a channel access for transmitting the PUCCH is performed based on the indicated channel access type.
4. The method of claim 1 , wherein the specific field is included in the success RAR for a shared spectrum.
5. The method of claim 1 , wherein the specific field of the success RAR in the message B indicates one of channel access types including Type 1, Type 2A, Type 2B, and Type 2C for the shared spectrum channel access,
wherein for the Type 1 channel access, a length of a time duration sensed as idle before uplink transmission is random, and
wherein for the Type 2A, the Type 2B, and the Type 2C channel access, the length of the time duration sensed as idle before uplink transmission is deterministic.
6. A user equipment (UE) for transmitting and receiving a signal in a wireless communication system, the UE comprising:
at least one transceiver;
at least one processor; and
at least one memory operatively coupled to the at least one processor and storing instructions that, based on being executed, cause the at least one processor to perform operations comprising:
transmitting a message A including a physical uplink shared channel (PUSCH);
receiving a message B based on the message A; and
transmitting a physical uplink control channel (PUCCH) on a PUCCH resource based on the message B,
wherein the PUCCH includes hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information for the Message B,
wherein based on the HARQ-ACK information being transmitted on the PUCCH with shared spectrum channel access, a channel access type for the PUCCH resource for the shared spectrum channel access is indicated based on a specific field of a success random access response (RAR) in the message B, and
wherein, based on the HARQ-ACK information being transmitted on the PUCCH with non-shared spectrum channel access, the specific field of the success RAR is reserved.
7. The UE of claim 6 , wherein the success RAR is a UE-specific message.
8. The UE of claim 6 , wherein a channel access for transmitting the PUCCH is performed based on the indicated channel access type.
9. The UE of claim 6 , wherein the specific field is included in the success RAR for a shared spectrum.
10. The UE of claim 6 , wherein the specific field of the success RAR in the message B indicates one of channel access types including Type 1, Type 2A, Type 2B, and Type 2C for the shared spectrum channel access,
wherein for the Type 1 channel access, a length of a time duration sensed as idle before uplink transmission is random, and
wherein for the Type 2A, the Type 2B, and the Type 2C channel access, the length of the time duration sensed as idle before uplink transmission is deterministic.
11. A method for transmitting and receiving a signal by a base station in a wireless communication, the method comprising:
receiving a message A;
transmitting a message B based on the message A including a physical uplink shared channel (PUSCH); and
receiving a physical uplink control channel (PUCCH) on a PUCCH resource based on the message B,
wherein the PUCCH includes hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information for the Message B,
wherein based on the HARQ-ACK information being transmitted on the PUCCH with shared spectrum channel access, a channel access type for the PUCCH resource in the shared spectrum channel access is indicated based on a specific field of a success random access response (RAR) in the message B, and
wherein, based on the HARQ-ACK information being transmitted on the PUCCH with non-shared spectrum channel access, the specific field of the success RAR is reserved.
12. The method of claim 11 , wherein the success RAR is a UE-specific message.
13. The method of claim 11 , wherein a channel access for transmitting the PUCCH is performed based on the indicated channel access type.
14. The method of claim 11 , wherein the specific field is included in the success RAR for a shared spectrum.
15. The method of claim 11 , wherein the specific field of the success RAR in the message B indicates one of channel access types including Type 1, Type 2A, Type 2B, and Type 2C for the shared spectrum channel access,
wherein for the Type 1 channel access, a length of a time duration sensed as idle before uplink transmission is random, and
wherein for the Type 2A, the Type 2B, and the Type 2C channel access, the length of the time duration sensed as idle before uplink transmission is deterministic.