BACKGROUND

The following relates generally to wireless communications, and more specifically to cell-based transmission priority.

Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE).

In some cases, a UE may receive control information scheduling various transmissions that are sent at different times, which may be based on when the control information or a subsequent transmission is received. However, the time at which a transmission is to be sent may, in some cases, increases communications latency or may otherwise be undesirable. Therefore, techniques to better handle conflicting scheduled transmissions may be desirable.

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support cell-based transmission priority. Generally, the described techniques provide for improved methods for out-of-order transmission processes (such as out-of-order hybrid automatic repeat request (HARQ)-acknowledgment (ACK)) based on the transmission priority of a cell associated with scheduled transmissions. According to one aspect, a UE may receive a first downlink control information (DCI) at a first time, and may receive a second DCI at a second, later, time. Each DCI may include scheduling information for scheduling downlink transmissions at the UE. In one case, a downlink transmission associated with the first DCI may be scheduled on a first cell (e.g., a component carrier, a virtual cell, etc.), and may be scheduled to occur before a downlink transmission associated with the second DCI scheduled on a second cell. The UE may then determine priorities associated with the first and second cells (e.g., whether the cell is a high priority cell or a low priority cell). In cases where the priority of the second cell is greater than the priority of the first cell, the UE may transmit HARQ-ACK for the second scheduled downlink transmission before it may transmit HARQ-ACK for the first scheduled downlink transmission. In this way, the UE may prioritize transmitting HARQ-ACK feedback for the second scheduled downlink transmission, and may thus deprioritize HARQ-ACK feedback for the first scheduled downlink transmission.

According to another aspect, the UE may receive a first DCI at a first time, and may receive a second DCI at a second, later, time. Each DCI may contain scheduling information for uplink or downlink transmissions at the UE. In one example, the first DCI may schedule a first transmission on a first cell, and the second DCI may schedule a second transmission on a second cell, where the second transmission is scheduled to start before or during (e.g., overlapping with) the first scheduled transmission. In some examples, the first and second scheduled transmissions may comprise a data transmission over a physical uplink shared channel (PUSCH). The UE may then determine priorities associated with the first and second cells (e.g., whether the cell is a high priority cell or a low priority cell). In cases where the priority of the second cell is greater than the priority of the first cell, the UE may communicate using the second scheduled transmission before communicating with the first scheduled transmission. In other cases, the UE may puncture or interrupt the first scheduled transmission with the second scheduled transmission based on the priority of the cell associated with the second transmission. In any case, the UE may prioritize transmitting the second scheduled transmission (e.g., the high priority transmission) over the first scheduled transmission (e.g., the lower priority transmission). In some examples, a high priority cell may be associated with a particular service. For instance, ultra-reliable low-latency communications (URLLC) may be associated with a high priority cell, whereas a low priority cell may be associated with enhanced mobile broadband (eMBB) communications.

A method of wireless communications is described. The method may include receiving a first downlink control information scheduling a first downlink transmission, receiving a second downlink control information scheduling a second downlink transmission, where the second downlink transmission is scheduled to start after the first downlink transmission, determining that a first feedback message responsive to the first downlink transmission is scheduled to start no earlier than a second feedback message responsive to the second downlink transmission, the first feedback message being associated with a first cell and the second feedback message being associated with a second cell, determining, based on the first feedback message being scheduled to start no earlier than the second feedback message, that the second cell has a second priority that is greater than a first priority of the first cell, and transmitting the second feedback message based on determining that the second cell has the second priority, where the second feedback message is prioritized over the first feedback message based on the second priority.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive a first downlink control information scheduling a first downlink transmission, receive a second downlink control information scheduling a second downlink transmission, where the second downlink transmission is scheduled to start after the first downlink transmission, determine that a first feedback message responsive to the first downlink transmission is scheduled to start no earlier than a second feedback message responsive to the second downlink transmission, the first feedback message being associated with a first cell and the second feedback message being associated with a second cell, determine, based on the first feedback message being scheduled to start no earlier than the second feedback message, that the second cell has a second priority that is greater than a first priority of the first cell, and transmit the second feedback message based on determining that the second cell has the second priority, where the second feedback message is prioritized over the first feedback message based on the second priority.

Another apparatus for wireless communications is described. The apparatus may include means for receiving a first downlink control information scheduling a first downlink transmission, receiving a second downlink control information scheduling a second downlink transmission, where the second downlink transmission is scheduled to start after the first downlink transmission, determining that a first feedback message responsive to the first downlink transmission is scheduled to start no earlier than a second feedback message responsive to the second downlink transmission, the first feedback message being associated with a first cell and the second feedback message being associated with a second cell, determining, based on the first feedback message being scheduled to start no earlier than the second feedback message, that the second cell has a second priority that is greater than a first priority of the first cell, and transmitting the second feedback message based on determining that the second cell has the second priority, where the second feedback message is prioritized over the first feedback message based on the second priority.

A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by a processor to receive a first downlink control information scheduling a first downlink transmission, receive a second downlink control information scheduling a second downlink transmission, where the second downlink transmission is scheduled to start after the first downlink transmission, determine that a first feedback message responsive to the first downlink transmission is scheduled to start no earlier than a second feedback message responsive to the second downlink transmission, the first feedback message being associated with a first cell and the second feedback message being associated with a second cell, determine, based on the first feedback message being scheduled to start no earlier than the second feedback message, that the second cell has a second priority that is greater than a first priority of the first cell, and transmit the second feedback message based on determining that the second cell has the second priority, where the second feedback message is prioritized over the first feedback message based on the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that the second cell may have the second priority may include operations, features, means, or instructions for receiving the second downlink control information via a physical downlink control channel on the second cell, and determining that the second cell may have the second priority based on the physical downlink control channel being on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying the second cell as a scheduling cell based on a control resource set, a search space, a scrambling sequence, a cell-specific configuration for the second cell, or a combination thereof, where the second priority may be based on the scheduling cell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that the second cell may have the second priority may include operations, features, means, or instructions for identifying that the second downlink transmission may be scheduled to occur on the second cell based on the second downlink control information, and determining that the second cell may have the second priority based on the second downlink transmission being scheduled on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, as part of the second downlink control information, an indication that the second cell may have the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second downlink control information includes a format that excludes a carrier indicator.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving the second downlink control information via a physical downlink control channel on the second cell, and identifying that the second downlink transmission may be scheduled to occur on the second cell based on the second downlink control information, where determining that the second cell may have the second priority may be based on the second downlink transmission being scheduled to occur on the second cell, or the physical downlink control channel being received on the second cell, or a combination thereof.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying the second cell as a scheduling cell based on a control resource set, a search space, a scrambling sequence, a cell-specific configuration for the second cell, or a combination thereof, where the second priority may be based on the scheduling cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the second downlink transmission may be scheduled to occur on a same cell that the second downlink control information may be received on, where the second feedback message may be prioritized over the first feedback message based on the second downlink control information and the second downlink transmission being on the same cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the second downlink control information was received on the second cell based on a cell identifier, a scrambling sequence, a control resource set, a search space, or a combination thereof, where at least one of the cell identifier, the control resource set, or the search space corresponds to the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a first set of cells having the first priority and a second set of cells having the second priority, determining a UE capability based on supporting at least a subset of the first set of cells, or a subset of the second set of cells, or a combination thereof, and transmitting, to a base station, a report indicating the determined UE capability.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that the second cell may have the second priority may include operations, features, means, or instructions for receiving, from a base station, an indication that the second cell may have the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a cell-specific parameter that may be modified via radio resource control signaling.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a cell-specific parameter that may be modified via medium access control (MAC) control element messaging.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a bandwidth part-specific radio resource control parameter.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving downlink control information indicating a switch of a bandwidth part, where the second priority may be modified based on the switch of the bandwidth part.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second feedback message may be transmitted before the first feedback message, the second feedback message interrupts the first feedback message, the second feedback message preempts the first feedback message, the second feedback message punctures the first feedback message, or a combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first cell and the second cell include respective cells that may be associated with a same physical cell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first cell and the second cell include respective cells that may be each associated with a different physical cell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first feedback message includes a first hybrid automatic repeat request feedback for the first downlink transmission, and the second feedback message includes a second hybrid automatic repeat request feedback for the second downlink transmission.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first feedback message may be associated with a first service type, and the second feedback message may be associated with a second service type.

A method of wireless communications is described. The method may include receiving a first downlink control information scheduling a first transmission associated with a first cell, receiving, no earlier than the first downlink control information, a second downlink control information scheduling a second transmission associated with a second cell, where the second scheduled transmission is scheduled to start before or during the first scheduled transmission, determining, based on the second scheduled transmission being scheduled to start before or during the first scheduled transmission, that the second cell has a second priority that is greater than a first priority of the first cell, and communicating using the second scheduled transmission based on determining that the second cell has the second priority, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive a first downlink control information scheduling a first transmission associated with a first cell, receive, no earlier than the first downlink control information, a second downlink control information scheduling a second transmission associated with a second cell, where the second scheduled transmission is scheduled to start before or during the first scheduled transmission, determine, based on the second scheduled transmission being scheduled to start before or during the first scheduled transmission, that the second cell has a second priority that is greater than a first priority of the first cell, and communicate using the second scheduled transmission based on determining that the second cell has the second priority, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

Another apparatus for wireless communications is described. The apparatus may include means for receiving a first downlink control information scheduling a first transmission associated with a first cell, receiving, no earlier than the first downlink control information, a second downlink control information scheduling a second transmission associated with a second cell, where the second scheduled transmission is scheduled to start before or during the first scheduled transmission, determining, based on the second scheduled transmission being scheduled to start before or during the first scheduled transmission, that the second cell has a second priority that is greater than a first priority of the first cell, and communicating using the second scheduled transmission based on determining that the second cell has the second priority, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by a processor to receive a first downlink control information scheduling a first transmission associated with a first cell, receive, no earlier than the first downlink control information, a second downlink control information scheduling a second transmission associated with a second cell, where the second scheduled transmission is scheduled to start before or during the first scheduled transmission, determine, based on the second scheduled transmission being scheduled to start before or during the first scheduled transmission, that the second cell has a second priority that is greater than a first priority of the first cell, and communicate using the second scheduled transmission based on determining that the second cell has the second priority, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that the second cell may have the second priority may include operations, features, means, or instructions for receiving the second downlink control information via a physical downlink control channel on the second cell, and determining that the second cell may have the second priority based on the physical downlink control channel being on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying the second cell as a cell allocating resources for the second scheduled transmission based on a control resource set, a search space, a scrambling sequence, a cell-specific configuration for the second cell, or a combination thereof, where the second priority may be based on the cell allocating the resources.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that the second cell may have the second priority may include operations, features, means, or instructions for identifying that the second scheduled transmission may be scheduled on the second cell based on the second downlink control information, and determining that the second cell may have the second priority based on the second scheduled transmission being scheduled on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, as part of the second downlink control information, an indication that the second cell may have the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second downlink control information includes a format that excludes a carrier indicator.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving the second downlink control information via a physical downlink control channel on the second cell, and identifying that the second scheduled transmission may be scheduled on the second cell based on the second downlink control information, where determining that the second cell may have the second priority may be based on the second scheduled transmission being scheduled on the second cell, or the physical downlink control channel being received on the second cell, or a combination thereof.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying the second cell as a cell allocating resources for the second scheduled transmission based on a control resource set, a search space, a scrambling sequence, a cell-specific configuration for the second cell, or a combination thereof, where the second priority may be based on the cell allocating the resources.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the second scheduled transmission may be scheduled on a same cell that the second downlink control information may be received on, where the second scheduled transmission may be prioritized over the first scheduled transmission based on the second downlink control information and the second scheduled transmission being on the same cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the second downlink control information was received on the second cell based on a cell identifier, a scrambling sequence, a control resource set, a search space, or a combination thereof, where at least one of the cell identifier, the control resource set, or the search space corresponds to the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a first set of cells having the first priority and a second set of cells having the second priority, determining a UE capability based on supporting at least a subset of the first set of cells, or a subset of the second set of cells, or a combination thereof, and transmitting, to a base station, a report indicating the determined UE capability.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that the second cell may have the second priority may include operations, features, means, or instructions for receiving, from a base station, an indication that the second cell may have the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a cell-specific parameter that may be modified via radio resource control signaling.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a cell-specific parameter that may be modified via medium access control (MAC) control element messaging.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a bandwidth part-specific radio resource control parameter.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving downlink control information indicating a switch of a bandwidth part, where the second priority may be modified based on the switch of the bandwidth part.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second scheduled transmission may be communicated before the first scheduled transmission, the second scheduled transmission interrupts the first scheduled transmission, the second scheduled transmission preempts the first scheduled transmission, the second scheduled transmission punctures the first scheduled transmission, or a combination thereof

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first cell and the second cell include respective virtual cells that may be associated with a same physical cell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first cell and the second cell include respective virtual cells that may be each associated with a different physical cell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first scheduled transmission includes a first physical downlink shared channel, and the second scheduled transmission includes a second physical downlink shared channel for a second downlink transmission.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first scheduled transmission includes a first physical uplink shared channel, and the second scheduled transmission includes a second physical uplink shared channel.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first scheduled transmission may be associated with a first service type, and the second scheduled transmission may be associated with a second service type.

A method of wireless communications is described. The method may include identifying a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmitting, to a UE, a first downlink control information scheduling a first downlink transmission, transmitting, to the UE, a second downlink control information scheduling a second downlink transmission, transmitting the first scheduled downlink transmission before the second scheduled downlink transmission, and receiving a second feedback message associated with the second cell, the second feedback message being prioritized over a first feedback message based on the second priority, where the first feedback message is responsive to the first scheduled downlink transmission and the second feedback message is responsive to the second scheduled downlink transmission.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmit, to a UE, a first downlink control information scheduling a first downlink transmission, transmit, to the UE, a second downlink control information scheduling a second downlink transmission, transmit the first scheduled downlink transmission before the second scheduled downlink transmission, and receive a second feedback message associated with the second cell, the second feedback message being prioritized over a first feedback message based on the second priority, where the first feedback message is responsive to the first scheduled downlink transmission and the second feedback message is responsive to the second scheduled downlink transmission.

Another apparatus for wireless communications is described. The apparatus may include means for identifying a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmitting, to a UE, a first downlink control information scheduling a first downlink transmission, transmitting, to the UE, a second downlink control information scheduling a second downlink transmission, transmitting the first scheduled downlink transmission before the second scheduled downlink transmission, and receiving a second feedback message associated with the second cell, the second feedback message being prioritized over a first feedback message based on the second priority, where the first feedback message is responsive to the first scheduled downlink transmission and the second feedback message is responsive to the second scheduled downlink transmission.

A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by a processor to identify a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmit, to a UE, a first downlink control information scheduling a first downlink transmission, transmit, to the UE, a second downlink control information scheduling a second downlink transmission, transmit the first scheduled downlink transmission before the second scheduled downlink transmission, and receive a second feedback message associated with the second cell, the second feedback message being prioritized over a first feedback message based on the second priority, where the first feedback message is responsive to the first scheduled downlink transmission and the second feedback message is responsive to the second scheduled downlink transmission.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the second downlink control information may include operations, features, means, or instructions for transmitting the second downlink control information via a physical downlink control channel on the second cell, where the second cell may have the second priority based on the physical downlink control channel being on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for configuring the second cell as a cell allocating resources for the second scheduled downlink transmission, where the configuration includes a control resource set, a search space, a scrambling sequence, a cell-specific configuration for the second cell, or a combination thereof, where the second priority may be based on the cell allocating the resources.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for scheduling the second scheduled downlink transmission on the second cell, where the second cell may have the second priority based on the second downlink transmission being scheduled on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for configuring the second downlink control information using a format that excludes a carrier indicator, and transmitting, as part of the second downlink control information, an indication that the second cell may have the second priority based on the format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the second downlink control information via a physical downlink control channel on the second cell, and scheduling the second scheduled downlink transmission on the second cell, where the second cell may have the second priority based on the second scheduled downlink transmission being on the second cell, or the physical downlink control channel being transmitted on the second cell, or a combination thereof.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for scheduling the second scheduled downlink transmission on a same cell that the second downlink control information may be transmitted on, where the second feedback message may be prioritized over the first feedback message based on the second downlink control information and the second scheduled downlink transmission being on the same cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, to the UE, that the second downlink control information may be transmitted on the second cell, the indication including a cell identifier, a scrambling sequence, a control resource set, a search space, or a combination thereof, where at least one of the cell identifier, the control resource set, or the search space corresponds to the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the UE, a report including a UE capability, the UE capability including an indication that the UE supports at least a subset of a first set of cells having the first priority, or at least subset of a second set of cells having the second priority, or a combination thereof, and transmitting the first downlink control information and the second downlink control information based on the UE capability.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the UE, an indication that the second cell may have the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a cell-specific parameter that may be modified via radio resource control signaling, a cell-specific parameter that may be modified via medium access control (MAC) control element messaging, a bandwidth part-specific radio resource control parameter, or a combination thereof.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting downlink control information indicating a switch of a bandwidth part, where the second priority may be modified based on the switch of the bandwidth part.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second feedback message may be received before the first feedback message, the second feedback message interrupts the first feedback message, the second feedback message preempts the first feedback message, the second feedback message punctures the first feedback message, or a combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first feedback message includes a first hybrid automatic repeat request feedback for the first downlink transmission, and the second feedback message includes a second hybrid automatic repeat request feedback for the second downlink transmission.

A method of wireless communications is described. The method may include identifying a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmitting a first downlink control information scheduling a first transmission associated with the first cell, transmitting, after the first downlink control information, a second downlink control information scheduling a second transmission associated with the second cell, and communicating using the second scheduled transmission, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmit a first downlink control information scheduling a first transmission associated with the first cell, transmit, after the first downlink control information, a second downlink control information scheduling a second transmission associated with the second cell, and communicate using the second scheduled transmission, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

Another apparatus for wireless communications is described. The apparatus may include means for identifying a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmitting a first downlink control information scheduling a first transmission associated with the first cell, transmitting, after the first downlink control information, a second downlink control information scheduling a second transmission associated with the second cell, and communicating using the second scheduled transmission, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by a processor to identify a first priority for a first cell and a second priority for a second cell, where the second priority is greater than the first priority, transmit a first downlink control information scheduling a first transmission associated with the first cell, transmit, after the first downlink control information, a second downlink control information scheduling a second transmission associated with the second cell, and communicate using the second scheduled transmission, where the second scheduled transmission is prioritized over the first scheduled transmission based on the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the second downlink control information may include operations, features, means, or instructions for transmitting the second downlink control information via a physical downlink control channel on the second cell, where the second cell may have the second priority based on the physical downlink control channel being on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for configuring the second cell as a cell allocating resources for the second scheduled transmission, where the configuration includes a control resource set, a search space, a scrambling sequence, a cell-specific configuration for the second cell, or a combination thereof, where the second priority may be based on the cell allocating the resources.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for scheduling the second scheduled transmission on the second cell, where the second cell may have the second priority based on the second scheduled transmission being scheduled on the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for configuring the second downlink control information using a format that excludes a carrier indicator, and transmitting, as part of the second downlink control information, an indication that the second cell may have the second priority based on the format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the second downlink control information via a physical downlink control channel on the second cell, and scheduling the second scheduled transmission on the second cell, where the second cell may have the second priority based on the second scheduled transmission being on the second cell, or the physical downlink control channel being transmitted on the second cell, or a combination thereof.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for scheduling the second scheduled transmission on a same cell as the second downlink control information, where the second scheduled transmission may be prioritized over the first scheduled transmission based on the second downlink control information and the second scheduled downlink transmission being on the same cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, to the UE, that the second downlink control information may be transmitted on the second cell, the indication including a cell identifier, a scrambling sequence, a control resource set, a search space, or a combination thereof, where at least one of the cell identifier, the control resource set, or the search space corresponds to the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the UE, a report including a UE capability, the UE capability including an indication that the UE supports at least a subset of a first set of cells having the first priority, or at least subset of a second set of cells having the second priority, or a combination thereof, and transmitting the first downlink control information and the second downlink control information based on the UE capability.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the UE, an indication that the second cell may have the second priority.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication includes a cell-specific parameter that may be modified via radio resource control signaling, a cell-specific parameter that may be modified via medium access control (MAC) control element messaging, a bandwidth part-specific radio resource control parameter, or a combination thereof.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting downlink control information indicating a switch of a bandwidth part, where the second priority may be modified based on the switch of the bandwidth part.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second scheduled transmission may be received before the first scheduled transmission, the second scheduled transmission interrupts the first scheduled transmission, the second scheduled transmission preempts the first scheduled transmission, the second scheduled transmission punctures the first scheduled transmission, or a combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first scheduled transmission includes a first physical downlink shared channel, and the second scheduled transmission includes a second physical downlink shared channel for a second downlink transmission.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first scheduled transmission includes a first physical uplink shared channel, and the second scheduled transmission includes a second physical uplink shared channel.

