Reliable control signaling
Systems, methods, and instrumentalities are disclosed for reliable control signaling, for example, in New Radio (NR). A receiver in a wireless transmit/receive unit (WTRU) may receive one or more physical downlink control channel (PDCCH) transmissions comprising downlink control information (DCI). The WTRU may determine a transmission profile associated with an uplink control information (UCI). Based on the transmission profile, the WTRU may determine one or more transmission characteristics associated with the transmission of the UCI. The WTRU may transmit the UCI over a physical uplink control channel (PUCCH). The UCI may be transmitted using transmission characteristics determined by the WTRU. The WTRU may transmit the UCI based on at least one of a control resource set (CORESET), a search space, or a radio network temporary identifier (RNTI). The WTRU may determine a transmission profile differently based on what the UCI may comprise.
1. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
receive configuration information comprising a first physical uplink control channel (PUCCH) configuration associated with a first set of PUCCH resources and a second PUCCH configuration associated with a second set of PUCCH resources, wherein the first set of PUCCH resources associated with the first PUCCH configuration are associated with a first transmission profile and the second set of PUCCH resources associated with the second PUCCH configuration are associated with a second transmission profile;
receive a first physical downlink control channel (PDCCH) transmission comprising first downlink control information (DCI), wherein the first DCI comprises a first resource indicator;
determine whether a first uplink transmission is to be performed using the first transmission profile or the second transmission profile based on the first DCI;
select a first PUCCH resource based on the first resource indicator, wherein the first PUCCH resource is comprised in the first set of PUCCH resources associated with the first PUCCH configuration on a condition that the first uplink transmission is determined to be performed using the first transmission profile based on the DCI and the first PUCCH resource is comprised in the second set of PUCCH resources associated with the second PUCCH configuration on a condition that the first uplink transmission is determined to be performed using the second transmission profile based on the DCI; and
transmit the first uplink transmission using the selected first PUCCH resource.
2. The WTRU of claim 1 , wherein the first uplink transmission comprises hybrid automatic repeat request (HARD) acknowledgement/non-acknowledgement (ACK/NACK) feedback.
3. The WTRU of claim 1 , wherein the first resource indicator is an acknowledgement/non-acknowledgement (ACK/NACK) resource indicator (ART).
4. The WTRU of claim 1 , wherein the processor is further configured to determine one or more of the following based on the first transmission profile or the second transmission profile: a format associated with the first uplink transmission, a number of symbols associated with the first uplink transmission, or a numerology associated with the first uplink transmission.
5. The WTRU of claim 4 , wherein the numerology associated with the first uplink transmission comprises one or more of a subcarrier spacing, a length of a cyclic prefix, or a number of symbols per slot.
6. The WTRU of claim 1 , wherein the DCI comprises a field, the field indicating whether the first uplink transmission is to be performed using the first transmission profile or the second transmission profile.
7. The WTRU of claim 1 , wherein the first transmission profile is associated with a first priority level and the second transmission profile is associated with a second priority level, and wherein the processor is further configured to:
determine that a priority level of the first uplink transmission is higher than a priority level of a second uplink transmission; and
drop the second uplink transmission based on the priority level of the first uplink transmission being higher than the priority level of the second uplink transmission.
8. The WTRU of claim 1 , wherein the processor is further configured to determine, based on the first transmission profile or the second transmission profile, one or more of a type of code associated with the first uplink transmission, a code rate associated with the first uplink transmission, or a length of a cyclic redundancy check (CRC) associated with the first uplink transmission.
9. The WTRU of claim 1 , wherein the processor is further configured to determine a transmission power level for the first uplink transmission based on the first transmission profile or the second transmission profile, and wherein the first uplink transmission is transmitted using the determined transmission power level.
10. The WTRU of claim 1 , wherein the first transmission profile corresponds to a first type of transmission and the second transmission profile corresponds to a second type of transmission.
11. The WTRU of claim 10 , wherein the first type of transmission is an ultra-reliable low latency communication (URLLC) transmission, and the second type of transmission is a non-URLLC transmission.
12. A method implemented in a WTRU, the method comprising:
receiving configuration information comprising a first physical uplink control channel (PUCCH) configuration associated with a first set of PUCCH resources and a second PUCCH configuration associated with a second set of PUCCH resources, wherein the first set of PUCCH resources associated with the first PUCCH configuration are associated with a first transmission profile and the second set of PUCCH resources associated with the second PUCCH configuration are associated with a second transmission profile;
receiving a first physical downlink control channel (PDCCH) transmission comprising first downlink control information (DCI), wherein the first DCI comprises a first resource indicator;
determining whether a first uplink transmission is to be performed using the first transmission profile or the second transmission profile based on the first DCI;
selecting a first PUCCH resource based on the first resource indicator, wherein the first PUCCH resource is comprised in the first set of PUCCH resources associated with the first PUCCH configuration on a condition that the first uplink transmission is determined to be performed using the first transmission profile based on the DCI and the first PUCCH resource is comprised in the second set of PUCCH resources associated with the second PUCCH configuration on a condition that the first uplink transmission is determined to be performed using the second transmission profile based on the DCI; and
transmitting the first uplink transmission using the selected first PUCCH resource.
13. The method of claim 12 , wherein the first uplink transmission comprises hybrid automatic repeat request (HARD) acknowledgement/non-acknowledgement (ACK/NACK) feedback.
14. The method of claim 12 , wherein the resource indicator is an acknowledgement/non-acknowledgement (ACK/NACK) resource indicator (ARI).
15. The method of claim 12 , further comprising determining one or more of the following based on the first transmission profile or the second transmission profile: a format associated with the first uplink transmission, a number of symbols associated with the first uplink transmission, or a numerology associated with the first uplink transmission.
16. The method of claim 15 , wherein the numerology associated with the first uplink transmission comprises one or more of a subcarrier spacing, a length of a cyclic prefix, or a number of symbols per slot.
17. The method of claim 12 , wherein the DCI comprises a field, the field indicating whether the first uplink transmission is to be performed using the first transmission profile or the second transmission profile.
18. The method of claim 10 , wherein the first transmission profile is associated with a first priority level and the second transmission profile is associated with a second priority level, and wherein the method further comprises:
determining that a priority level of the first uplink transmission is higher than a priority level of a second uplink transmission; and
dropping the second uplink transmission based on the priority level of the first uplink transmission being higher than the priority level of the second uplink transmission.
19. The method of claim 12 , further comprising determining, based on the first transmission profile or the second transmission profile, one or more of a type of code associated with the first uplink transmission, a code rate associated with the first uplink transmission, or a length of a cyclic redundancy check (CRC) associated with the first uplink transmission.
20. The method of claim 12 , further comprising determining a transmission power level for the first uplink transmission based on the first transmission profile or the second transmission profile, wherein the first uplink transmission is transmitted using the determined transmission power level.