Method and apparatus for transmitting or receiving uplink signal for terminal supporting multiple TTIs, multiple subcarrier spacings, or multiple processing times in wireless communication system
A method of transmitting a scheduling request (SR) for a user equipment (UE) for supporting a plurality of transmission time interval (TTI) lengths in a wireless communication system is performed by the UE and includes receiving downlink data, and transmitting hybrid automatic retransmission request-acknowledgement/non-acknowledgement (HARQ-ACK) in a first physical uplink control channel (PUCCH) with a first TTI length for transmitting HARQ-ACK corresponding to the downlink data when transmission timings of the first PUCCH and a second PUCCH for transmitting SR overlap with each other, wherein, when the first PUCCH includes a smaller number of symbols than the second PUCCH and the first PUCCH does not include an effective SR resource, the SR is not transmitted.
1. A method of transmitting control information for a terminal supporting transmission time intervals (TTIs) of different lengths in a wireless communication system, the method performed by the terminal and comprising:
in a state in which (i) a scheduling request (SR) is prepared as part of a transmission of a first TTI-based physical uplink control channel (PUCCH), and (ii) the first TTI-based PUCCH overlaps in time with a second TTI-based PUCCH, where a number of symbols in the second TTI is less than a number of symbols in the first TTI:
dropping the transmission of the first TTI-based PUCCH;
determining whether to transmit the SR on the second TTI-based PUCCH based on whether the second TTI-based PUCCH coincides with a second TTI-based SR transmission instance; and
based on the second TTI-based PUCCH not coinciding with the second TTI-based SR transmission instance, not transmitting the SR on the second TTI-based PUCCH.
2. The method according to claim 1 , wherein in the state in which the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH and based on the second TTI-based PUCCH coinciding with the second TTI-based SR transmission instance, the SR is transmitted on the second TTI-based PUCCH.
3. The method according to claim 1 , wherein the SR comprises a request or a resource configuration request for uplink transmission that does not require uplink grant.
4. The method according to claim 3 , wherein the SR is represented by a plurality of bits; and
wherein each state represented by the plurality of bits is linked with a hybrid-automatic-repeat-request (HARQ) process number associated with the uplink transmission.
5. The method according to claim 3 , wherein the SR is represented by a plurality of bits; and
wherein a HARQ process number associated with the uplink transmission is determined according to a combination of the plurality of bits and a resource for transmitting the uplink transmission.
6. The method according to claim 1 , further comprising:
in the state in which the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH and based on the second TTI-based PUCCH coinciding with the second TTI-based SR transmission instance:
bundling and mapping, to a state of a modulation symbol to be transmitted, two types of information of (i) the SR, (ii) HARQ acknowledgment/non-acknowledgment (HARQ-ACK/NACK), and (iii) a buffer state report (BSR).
7. The method according to claim 1 , further comprising:
in the state in which the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH and based on the second TTI-based PUCCH coinciding with the second TTI-based SR transmission instance:
transmitting, on the second TTI-based PUCCH using a modified PUCCH format or a greater number of resource blocks, (i) the SR, (ii) HARQ-ACK/NACK, and (iii) a BSR.
8. The method according to claim 1 , wherein the SR is for a specific service or a specific requirement, and
wherein a time interval or a time period of the second TTI-based SR transmission instance is shorter than a time interval or a time period of an SR transmission instance timing for general data traffic.
9. A terminal configured to transmit control information in a wireless communication system, the terminal supporting transmission time intervals (TTIs) of different lengths, the terminal comprising:
a receiver and a transmitter;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
in a state in which (i) a scheduling request (SR) is prepared as part of a transmission of a first TTI-based physical uplink control channel (PUCCH), and (ii) the first TTI-based PUCCH overlaps in time with a second TTI-based PUCCH, where a number of symbols in the second TTI is less than a number of symbols in the first TTI:
dropping the transmission of the first TTI-based PUCCH;
determining whether to transmit the SR on the second TTI-based PUCCH based on whether the second TTI-based PUCCH coincides with a second TTI-based SR transmission instance; and
based on the second TTI-based PUCCH not coinciding with the second TTI-based SR transmission instance, not transmitting the SR on the second TTI-based PUCCH.
10. The terminal according to claim 9 , wherein in the state in which the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH and based on the second TTI-based PUCCH coinciding with the second TTI-based SR transmission instance, the SR is transmitted on the second TTI-based PUCCH.
11. The terminal according to claim 9 , wherein the SR comprises a request or a resource configuration request for uplink transmission that does not require uplink grant.
12. The terminal according to claim 11 , wherein the SR is represented by a plurality of bits; and
wherein each state represented by the plurality of bits is linked with a hybrid-automatic-repeat-request (HARQ) process number associated with the uplink transmission.
13. The terminal according to claim 11 , wherein the SR is represented by a plurality of bits; and
wherein a HARQ process number associated with the uplink transmission is determined according to a combination of the plurality of bits and a resource for transmitting the uplink transmission.
14. The terminal according to claim 9 , wherein the operations further comprise:
in the state in which the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH and based on the second TTI-based PUCCH coinciding with the second TTI-based SR transmission instance:
bundling and mapping, to a state of a modulation symbol to be transmitted, two types of information of (i) the SR, (ii) HARQ acknowledgment/non-acknowledgment (HARQ-ACK/NACK), and (iii) a buffer state report (BSR).
15. The terminal according to claim 9 , wherein the operations further comprise:
in the state in which the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH and based on the second TTI-based PUCCH coinciding with the second TTI-based SR transmission instance:
transmitting, on the second TTI-based PUCCH using a modified PUCCH format or a greater number of resource blocks, (i) the SR, (ii) HARQ-ACK/NACK, and (iii) a BSR.
16. The terminal according to claim 9 , wherein the SR is for a specific service or a specific requirement, and
wherein a time interval or a time period of the second TTI-based SR transmission instance is shorter than a time interval or a time period of an SR transmission instance timing for general data traffic.
17. A method of receiving control information that is transmitted by a terminal supporting transmission time intervals (TTIs) of different lengths in a wireless communication system, the method performed by a base station (BS) and comprising:
in a state in which (i) a scheduling request (SR) is prepared by the terminal as part of a transmission of a first TTI-based physical uplink control channel (PUCCH), and (ii) the first TTI-based PUCCH overlaps in time with a second TTI-based PUCCH, where a number of symbols in the second TTI is less than a number of symbols in the first TTI:
not receiving transmission of the first TTI-based PUCCH; and
based on the second TTI-based PUCCH not coinciding with a second TTI-based SR transmission instance, not receiving the SR on the second TTI-based PUCCH.
18. The method according to claim 1 , wherein the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH by completely or partially overlapping.
19. The terminal according to claim 9 , wherein the first TTI-based PUCCH overlaps in time with the second TTI-based PUCCH by completely or partially overlapping.
20. At least one non-transitory computer-readable storage medium encoded with at least one computer program comprising instructions that, when executed by at least one processor, perform operations of transmitting control information in a terminal supporting transmission time intervals (TTIs) of different lengths, the operations comprising:
in a state in which (i) a scheduling request (SR) is prepared as part of a transmission of a first TTI-based physical uplink control channel (PUCCH), and (ii) the first TTI-based PUCCH overlaps in time with a second TTI-based PUCCH, where a number of symbols in the second TTI is less than a number of symbols in the first TTI:
dropping the transmission of the first TTI-based PUCCH;
determining whether to transmit the SR on the second TTI-based PUCCH based on whether the second TTI-based PUCCH coincides with a second TTI-based SR transmission instance; and
based on the second TTI-based PUCCH not coinciding with the second TTI-based SR transmission instance, not transmitting the SR on the second TTI-based PUCCH via a transceiver of the terminal.