Patent Publication Number: US-2023163925-A1

Title: Assignment indexes for dynamic feedback

Description:
CROSS REFERENCE 
     The present Application for Patent is a continuation of U.S. patent application Ser. No. 17/148,251 by KHOSHNEVISAN et al., entitled “ASSIGNMENT INDEXES FOR DYNAMIC FEEDBACK,” filed Jan. 13, 2021, assigned to the assignee hereof, and expressly incorporated by reference in its entirety herein. 
    
    
     FIELD OF TECHNOLOGY 
     The following relates to wireless communications, including assignment indexes for dynamic feedback. 
     BACKGROUND 
     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 one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE). 
     SUMMARY 
     The described techniques relate to improved methods, systems, devices, and apparatuses that support assignment indexes for dynamic feedback. Generally, the described techniques provide for determining an order of assignment indicator values (e.g., a downlink assignment indicator (DAI) values) in a feedback message when two scheduling cells in the same monitoring occasion schedule transmissions in the same scheduled serving cell. Assignment indicator values may be assigned (e.g., by a UE) to transmissions according to a set of rules, and may serve as a temporary index to map each transmission to a corresponding feedback information in a feedback message (e.g., hybrid automatic repeat request (HARD) feedback, such as an acknowledgement (ACK) or negative acknowledgement (NACK)). A UE may use aspects of the described techniques to determine an order between assignment indicator values based on, for example, indexes of the scheduling serving cells, scheduled transmission start times for the scheduled transmissions, among other examples. 
     A method for wireless communication at a UE is described. The method may include receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information, and determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     An apparatus for wireless communication at a UE 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, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, identify a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information, and determine an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Another apparatus for wireless communication at a UE is described. The apparatus may include means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, means for identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information, and means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to receive, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, identify a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information, and determine an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell and identifying a first start time for the first transmission scheduled by the first serving cell and a second start time for the third transmission scheduled by the first serving cell, where determining the order of the first assignment indicator value and the second assignment indicator value may be based on the first start time and the second start time. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the first index of the first serving cell used to communicate the third control information, the first start time, and the second start time. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to an earlier start time of the first start time and the second start time. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, during a second monitoring occasion after the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell and determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the second monitoring occasion occurring after the monitoring occasion. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to the monitoring occasion occurring before the second monitoring occasion. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for a fourth serving cell, identifying a third index of the third serving cell scheduled by the first control information and the second control information and a fourth index of the fourth serving cell scheduled by the third control information, and determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the third index and the fourth index. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to a lower index value of the third index associated with the third serving cell and the fourth index associated with the fourth serving cell. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting feedback information for the first transmission and the second transmission based on determining the order between the first assignment indicator value and the second assignment indicator value. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the feedback information includes a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the feedback information may be communicated over a physical uplink control channel. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first serving cell includes a primary cell and the second serving cell includes a secondary cell. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first assignment indicator value includes a value of a downlink assignment indicator (DAI). 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a lower value of the first assignment indicator value and the second assignment indicator value corresponds to a lower index value of the first index associated with the first serving cell and the second index associated with the second serving cell. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first transmission or the second transmission may be communicated over a physical downlink shared channel or includes a release of semi-persistent scheduling resources. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the third serving cell scheduled by the first control information and the second control information includes the first serving cell. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the third serving cell scheduled by the first control information and the second control information may be different than the first serving cell and the second serving cell. 
     A method for wireless communication at a UE is described. The method may include receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, identifying a first start time for the first transmission and a second start time for the second transmission, and determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     An apparatus for wireless communication at a UE 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, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, identify a first start time for the first transmission and a second start time for the second transmission, and determine an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Another apparatus for wireless communication at a UE is described. The apparatus may include means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, means for identifying a first start time for the first transmission and a second start time for the second transmission, and means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to receive, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission, identify a first start time for the first transmission and a second start time for the second transmission, and determine an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first serving cell may be different than the second serving cell. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first transmission may be scheduled in the third serving cell using the first control information communicated over the first serving cell and the second control information communicated over the second serving cell that may be different than the first serving 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, during a second monitoring occasion after the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell and determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the second monitoring occasion occurring after the monitoring occasion. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to the monitoring occasion occurring before the second monitoring occasion. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for a fourth serving cell, identifying a third index of the third serving cell scheduled by the first control information and the second control information and a fourth index of the fourth serving cell scheduled by the third control information, and determining the order between a third assignment indicator value to the third transmission, the first assignment indicator value, and the second assignment indicator value based on the third index and the fourth index. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to a lower index value of the third index associated with the third serving cell and the fourth index associated with the fourth serving cell. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting feedback information for the first transmission and the second transmission based on determining the order between the first assignment indicator value and the second assignment indicator value, where the feedback information includes a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the feedback information includes a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the feedback information may be communicated over a physical uplink control channel. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first serving cell includes a primary cell and the second serving cell includes a secondary cell. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first assignment indicator value includes a value of a downlink assignment indicator (DAI). 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a lower value of the first assignment indicator value and the second assignment indicator value corresponds to an earlier start time of the first start time and the second start time. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first transmission or the second transmission may be communicated over a physical downlink shared channel or includes a release of semi-persistent scheduling resources. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the third serving cell scheduled by the first control information and the second control information includes the first serving cell. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the third serving cell scheduled by the first control information and the second control information may be different than the first serving cell and the second serving cell. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    illustrates an example of a wireless communications system that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. 
         FIGS.  2  and  3    illustrate examples of transmission configurations that support assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. 
         FIGS.  4  and  5    illustrate examples of process flows that support assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. 
         FIGS.  6  and  7    show block diagrams of devices that support assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. 
         FIG.  8    shows a block diagram of a communications manager that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. 
         FIG.  9    shows a diagram of a system including a device that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. 
         FIGS.  10  through  13    show flowcharts illustrating methods that support assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Wireless communication systems may schedule communications using a grant, e.g., a downlink control information (DCI) grant (which may also be referred to as simply DCI). For example, a base station may transmit DCI grants to user equipment (UE) to schedule downlink transmissions, with each DCI grant identifying resources and other information to be used for the corresponding downlink transmission. Generally, the DCI may indicate whether feedback reporting is requested for the downlink transmission. For example, the DCI may indicate that feedback reporting is requested, and may also identify the parameters for the feedback report (or message). For example, the DCI may indicate whether the feedback message utilizes a type-II (e.g., dynamic) hybrid automatic repeat/request-acknowledgment (HARQ-ACK) codebook design or a type-I HARQ-ACK codebook design. Moreover, an assignment indicator field (e.g., a downlink assignment indicator (DAI) field) in the DCI may indicate a numerical sequence (e.g., a counting sequence for downlink transmissions associated with the same HARQ reporting occasion) for the downlink transmission to be reported in the feedback message. That is, the assignment indicator may be assigned to a downlink transmission and may serve as a temporary index to map the downlink transmission to its corresponding HARQ feedback. 
     A UE may thus group HARQ feedback (e.g., ACKs and NACKs) for multiple downlink transmissions into a common feedback message (e.g., a physical uplink control channel (PUCCH)) message) according to the assignment indicator value of each transmission. The UE may determine an order between the assignment indicator values for a downlink transmissions in a feedback message according to one or more rules, e.g., based on one or more associated indexes. For instance, the assignment indicator value may be ordered based on a scheduled serving cell index (e.g., the index of the serving cell for which the transmission was scheduled) or a monitoring occasion index (e.g., the index of the monitoring occasion in which the DCI was received). However, in some circumstances, such rules may not be appropriate or may have limited applicability, and the UE may therefore be unable to determine the order for the assignment indicator values in such situations. For example, if two DCIs in two different scheduling serving cells schedule two transmissions in the same scheduled serving cell during the same monitoring occasion, the UE may have challenges ordering the assignment indicator values for the two scheduled transmissions. 
     Various techniques described herein support determining an order between assignment indicator values (e.g., DAIs) for downlink transmissions when two scheduling serving cells in a same monitoring occasion schedule transmissions in the same scheduled serving cell. For instance, the UE may receive a first DCIs over a first scheduling serving cell and a second DCI over a second scheduling serving cell in a same monitoring occasion, where the DCIs schedule transmissions for a scheduled serving cell. The UE may determine an order of the DAIs for the transmissions in a feedback message and may construct a HARQ-ACK codebook (e.g., a type-2 or dynamic HARQ-ACK codebook) corresponding to the transmissions based on the DAIs. 
     In a first example, the UE may determine an order of DAI values for each transmission based on the index of the scheduling serving cell(s). The UE may order the DAIs in increasing order of the scheduling serving cell index. In some cases, the DCIs may schedule transmissions for two or more scheduled serving cells, and the DAIs may be ordered first in increasing order of the scheduling serving cell index and second in increasing order of the scheduled serving cell index. In some examples, the UE may receive such DCIs in multiple different monitoring occasions, and the UE may order the DAIs first in increasing order of the scheduling serving cell index, second in increasing order of the scheduled serving cell index, and third in increasing order of the monitoring occasions. 
     In a second example, the UE may determine an order of DAI values for each transmission based on a start time of the scheduled transmissions. The UE may order the DAIs first in increasing order of the start time of the scheduled transmissions. In cases where transmissions have a same start time or where the transmissions are scheduled for multiple scheduled serving cells, the UE may order DAIs first in increasing order of the start time and second in increasing order of the scheduled serving cell index. Additionally, if the UE receives DCIs in multiple different monitoring occasions, the UE may order the DAIs third in increasing order of the monitoring occasions. 
     Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are then described with reference to transmission diagrams and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to assignment indexes for dynamic feedback. 
       FIG.  1    illustrates an example of a wireless communications system  100  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The wireless communications system  100  may include one or more base stations  105 , one or more UEs  115 , and a core network  130 . In some examples, the wireless communications system  100  may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system  100  may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof. 
     The base stations  105  may be dispersed throughout a geographic area to form the wireless communications system  100  and may be devices in different forms or having different capabilities. The base stations  105  and the UEs  115  may wirelessly communicate via one or more communication links  125 . Each base station  105  may provide a coverage area  110  over which the UEs  115  and the base station  105  may establish one or more communication links  125 . The coverage area  110  may be an example of a geographic area over which a base station  105  and a UE  115  may support the communication of signals according to one or more radio access technologies. 
     The UEs  115  may be dispersed throughout a coverage area  110  of the wireless communications system  100 , and each UE  115  may be stationary, or mobile, or both at different times. The UEs  115  may be devices in different forms or having different capabilities. Some example UEs  115  are illustrated in  FIG.  1   . The UEs  115  described herein may be able to communicate with various types of devices, such as other UEs  115 , the base stations  105 , or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in  FIG.  1   . 
     The base stations  105  may communicate with the core network  130 , or with one another, or both. For example, the base stations  105  may interface with the core network  130  through one or more backhaul links  120  (e.g., via an S1, N2, N3, or other interface). The base stations  105  may communicate with one another over the backhaul links  120  (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations  105 ), or indirectly (e.g., via core network  130 ), or both. In some examples, the backhaul links  120  may be or include one or more wireless links. 
     One or more of the base stations  105  described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology. 
     A UE  115  may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE  115  may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE  115  may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples. 
     The UEs  115  described herein may be able to communicate with various types of devices, such as other UEs  115  that may sometimes act as relays as well as the base stations  105  and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in  FIG.  1   . 
     The UEs  115  and the base stations  105  may wirelessly communicate with one another via one or more communication links  125  over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links  125 . For example, a carrier used for a communication link  125  may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system  100  may support communication with a UE  115  using carrier aggregation or multi-carrier operation. A UE  115  may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. 
     Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements that a UE  115  receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE  115 . A wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE  115 . 
     The time intervals for the base stations  105  or the UEs  115  may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of T s =1/(Δƒ max ·N ƒ ) seconds, where Δƒ max  may represent the maximum supported subcarrier spacing, and N ƒ  may represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023). 
     Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems  100 , a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N ƒ ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation. 
     A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system  100  and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system  100  may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)). 
     Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs  115 . For example, one or more of the UEs  115  may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs  115  and UE-specific search space sets for sending control information to a specific UE  115 . 
     Each base station  105  may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a base station  105  (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area  110  or a portion of a geographic coverage area  110  (e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station  105 . For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas  110 , among other examples. 
     A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs  115  with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered base station  105 , as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs  115  with service subscriptions with the network provider or may provide restricted access to the UEs  115  having an association with the small cell (e.g., the UEs  115  in a closed subscriber group (CSG), the UEs  115  associated with users in a home or office). A base station  105  may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers. 
     In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access for different types of devices. 
     In some examples, a base station  105  may be movable and therefore provide communication coverage for a moving geographic coverage area  110 . In some examples, different geographic coverage areas  110  associated with different technologies may overlap, but the different geographic coverage areas  110  may be supported by the same base station  105 . In other examples, the overlapping geographic coverage areas  110  associated with different technologies may be supported by different base stations  105 . The wireless communications system  100  may include, for example, a heterogeneous network in which different types of the base stations  105  provide coverage for various geographic coverage areas  110  using the same or different radio access technologies. 
     The wireless communications system  100  may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system  100  may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications. The UEs  115  may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions). Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData). Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein. 
     In some examples, a UE  115  may also be able to communicate directly with other UEs  115  over a device-to-device (D2D) communication link  135  (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs  115  utilizing D2D communications may be within the geographic coverage area  110  of a base station  105 . Other UEs  115  in such a group may be outside the geographic coverage area  110  of a base station  105  or be otherwise unable to receive transmissions from a base station  105 . In some examples, groups of the UEs  115  communicating via D2D communications may utilize a one-to-many (1:M) system in which each UE  115  transmits to every other UE  115  in the group. In some examples, a base station  105  facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs  115  without the involvement of a base station  105 . 
     The core network  130  may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network  130  may be an evolved packet core (EPC) or 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs  115  served by the base stations  105  associated with the core network  130 . User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services  150  for one or more network operators. The IP services  150  may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service. 
     Some of the network devices, such as a base station  105 , may include subcomponents such as an access network entity  140 , which may be an example of an access node controller (ANC). Each access network entity  140  may communicate with the UEs  115  through one or more other access network transmission entities  145 , which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs). Each access network transmission entity  145  may include one or more antenna panels. In some configurations, various functions of each access network entity  140  or base station  105  may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station  105 ). 
     The wireless communications system  100  may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. The UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs  115  located indoors. The transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz. 
     The wireless communications system  100  may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system  100  may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as the base stations  105  and the UEs  115  may employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples. 
     A base station  105  or a UE  115  may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station  105  or a UE  115  may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a base station  105  may be located in diverse geographic locations. A base station  105  may have an antenna array with a number of rows and columns of antenna ports that the base station  105  may use to support beamforming of communications with a UE  115 . Likewise, a UE  115  may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port. 
     Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station  105 , a UE  115 ) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation). 
     The UEs  115  and the base stations  105  may support retransmissions of data to increase the likelihood that data is received successfully. HARQ feedback is one technique for increasing the likelihood that data is received correctly over a communication link  125 . HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the medium access control (MAC) layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval. 
     In some examples, a UE  115  may group HARQ feedback for multiple downlink transmissions into a common feedback message, such as a PUCCH transmission. In such examples, the UE  115  may determine an order of assignment indicator values (e.g., DAI values) for each downlink transmission and may construct a codebook (e.g., a type-2 HARQ/ACK codebook) based on the order of the assignment indicator values. The UE  115  may determine the order of the assignment indicator values for the downlink transmissions according to one or more rules. The assignment indicator values may serve as temporary indexes to map each downlink transmission to its corresponding HARQ feedback in the PUCCH message. 
     A UE  115  may receive (e.g., from a base station  105 ) a DCI during a monitoring occasion, such as a PDCCH monitoring occasion (PMO). The DCI may be received over a first serving cell, which may be referred to as a scheduling serving cell, and may schedule one or more transmissions (e.g., physical downlink shared channel (PDSCH) transmissions, semi-persistent scheduling (SPS) resource releases) for a second serving cell (e.g., a component carrier, a primary cell, a secondary cell, etc.), which may be referred to as a scheduled serving cell. The UE  115  may receive additional DCIs over other scheduling serving cells to schedule additional transmissions for the scheduled serving cell. In some examples, the additional DCIs may be received by the UE  115  in the same monitoring occasion. 
     The UE  115  may determine an order of DAI values for each scheduled transmission for one or more scheduled serving cells based on one or more rules. In a first example, the UE  115  may identify indexes associated with each scheduling serving cell, and may determine an order of DAI values to each scheduled transmission based on the indexes of the scheduling serving cells. For instance, the UE  115  may determine an order of DAI values in increasing order of the scheduling serving cell index for transmissions scheduled by DCIs received in a same monitoring occasion. In this example, a transmission scheduled by a DCI received over a scheduling serving cell with an index of 1 may be assigned a lower value than a transmission scheduled by a DCI received over a scheduling serving cell with an index of 2. In a second example, the UE  115  may identify a start time for each scheduled transmission and may determine an order of the DAI values based on the start times. For instance, the UE  115  may determine an order of DAI values in increasing order of the transmission start time for transmissions scheduled by DCIs received in a same monitoring occasion. In some cases, the UE  115  may use some combination of the techniques described herein, or may use other techniques in addition to or in combination with the techniques described herein. 
       FIG.  2    illustrates an example of a transmission configuration  200  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. In some examples, the transmission configuration  200  may implement aspects of wireless communication system  100 . The transmission configuration  200  illustrates serving cells  205  over which a base station  105  and a UE  115 , as described with reference to  FIG.  1   , may communicate. For example, a base station may transmit, to a UE, DCIs  210  during monitoring occasions  215 . The DCIs  210  may schedule one or more transmissions, such as PDSCHs  220 . As described herein, the UE may determine an order of an assignment indicator value (e.g., a DAI value) to each PDSCH  220 , where the assignment indicator value may be used to map the PDSCHs  220  to corresponding feedback (e.g., HARQ) information. The UE may transmit the feedback information for the PDSCHs  220  in a common PUCCH  225 . 
     During a monitoring occasion  215 , the UE may monitor for and receive control information (e.g., DCIs  210 ) over one or more serving cells  205 , where the control information includes scheduling information for one or more transmissions (e.g., PDSCHs  220 ) for one or more serving cells  205 . A serving cell  205  over which a DCI  210  is received may be referred to as a scheduling serving cell, while a serving cell  205  for which a PDSCH  220  is scheduled may be referred to as a scheduled serving cell. A scheduling serving cell (e.g., serving cell  205 - b ) may thus schedule PDSCHs  220  for one or more scheduled serving cells (e.g., serving cells  205 - a  and  205 - c ). In some cases, a scheduling serving cell may schedule PDSCHs  220  for itself, e.g., the scheduling serving cell and the scheduled serving cell may be the same. Each serving cell  205  may be associated with a serving cell index. In some cases, the serving cells may be referred to as component carriers and the serving cell index may be an example of a component carrier index. 
     The UE may receive the PDSCHs  220  over the serving cells  205  according to the scheduling information and may determine feedback for each PDSCH  220 . In some examples, a DCI  210  may indicate that the base station requests feedback for the corresponding PDSCH  220  and, in some cases, the parameters for the feedback message. As an example, a DCI  210  may indicate that the UE should construct a type-2 (e.g., dynamic) HARQ/ACK codebook for the feedback message. The feedback may indicate, to the base station, an ACK or a NACK for each PDSCH  220 . For instance, if the UE did not receive a PDSCH  220  or did not receive the PDSCH  220  correctly, the UE may indicate a NACK for the PDSCH  220  in the corresponding feedback. Alternatively, if the UE successfully received a PDSCH  220 , the UE may indicate an ACK in the corresponding feedback. 
     The UE may group the feedback for multiple PDSCHs  220  into a common feedback message, which may be transmitted via PUCCH  225 . To support the grouped feedback, the UE may determine an order of an assignment indicator value (e.g., a DAI) for each PDSCH  220  and may use the order of the DAIs to map the PDSCH  220  to its corresponding feedback in the PUCCH  225 . That is, the UE may use the order of the DAIs to construct the HARQ/ACK codebook transmitted via the PUCCH  225 . For instance, the UE may construct the HARQ-Ack codebook based on the DAI values assigned to PDSCHs  220  according to one or more rules regarding the ordering of the DAI values, e.g., the UE may determine the order of the DAI values based on one or more conditions. For example, a first rule may be that DAI values are assigned after each monitoring occasion. For example, DCIs received during a first monitoring occasion may receive lower DAI values than DCIs received during a second monitoring occasion that occurs after the first monitoring occasion. In some examples, DAI values may be based on the monitoring occasion  215  in which the DCIs  210  scheduling the PDSCHs  220  were received. If the UE receives, during a first monitoring occasion  215 , a first DCI  210  scheduling a first PDSCH  220 , and also receives, during a second monitoring occasion  215 , a second DCI  210  scheduling a second PDSCH  220 , the UE may determine an order of the DAI values for the first and second PDSCHs  220  according to an order that is based on the respective DCIs  210  being received in the different monitoring occasions. The order determined by the UE may be based on a lower DAI value, for example, to a PDSCH  220  scheduled by a DCI  210  received in a monitoring occasion  215  that occurs earlier in time; in this specific example, the order determined by the UE may be based on a lower DAI value to the first PDSCH  220  than the DAI value assigned to the second PDSCH  220 . 
     As an example of a second rule, the UE may determine an order of a DAI value based on an index associated with the scheduled serving cell of the PDSCH  220 , where the scheduled serving cell is the serving cell  205  for which the PDSCH  220  was scheduled. Using the same example described above, the first PDSCH  220  may be scheduled for a serving cell  205  associated with an index of 2, and the second PDSCH  220  may be scheduled for a serving cell  205  associated with an index of 1. The DAI values may be ordered corresponding to the indexes, for example, such that a lower index of the scheduled serving cell corresponds to a lower DAI value. The order for the first PDSCH  220  may therefore be assigned a value of 2 (e.g., the second DAI), while the second PDSCH  220  may be assigned a value of 1 (e.g., the first DAI in the order). 
     In some cases, however, the first rule or the second rule alone may not be enough for the UE to determine an order of the DAI values for PDSCHs  220 , and the UE may use multiple rules in combination. For example, if two different scheduling serving cells (e.g., cells  205 - b  and  205 - c ) schedule different transmissions (e.g., PDSCHs using DCIs  210 - a  and  210 - b ) in the same scheduled (e.g., cell  205 - b ), the UE may not be capable of ordering assignment indicator values between the two scheduled transmissions. In some examples, the UE may receive, during a first monitoring occasion  215  and over a first scheduling serving cell, two DCIs  210  that schedule two PDSCHs  220  for a first scheduled serving cell. The UE may also receive, during the same monitoring occasion  215  but over a second scheduling serving cell, a second two DCIs  210  that schedule a second two PDSCHs  220  for a second scheduled serving cell. During a second monitoring occasion  215 , the UE may receive a third two DCIs  210  that schedule a third two PDSCHs  220  for a third scheduled serving cell. The first scheduled serving cell may be associated with an index of 2, the second scheduled serving cell may be associated with an index of 3, and the third scheduled serving cell may be associated with an index of 1. The UE may apply the first rule to determine DAI values based on the first and second monitoring occasions  215 , e.g., the PDSCHs  220  scheduled by DCIs  210  received in the first monitoring occasion  215  may have lower DAI values than the PDSCHs  220  scheduled by DCIs  210  received in the second monitoring occasion  215 . The second rule may be applied to further determine DAI values based on the indexes of the scheduled serving cells for PDSCHs  220  scheduled by DCIs  210  received during the same monitoring occasion  215 . For example, the first two PDSCHs  220  are associated with an index of 2 and the second two PDSCHs  220  are associated with an index of 3; thus, the first two PDSCHs  220  may be ordered to have lower values than the second two PDSCHs  220 . 
     To further refine the DAI values for the PDSCHs  220  that are scheduled by DCIs  210  received during the same monitoring occasion  215  and associated with the same scheduled serving cell (and thus same scheduled serving cell index), the UE may use an additional rule to determine a start time for each PDSCH  220  and may determine an order of DAI values based on the start time. For example, the UE may identify which of the first two PDSCHs  220  have an earlier start time, and may determine an order of that includes the earlier start time being earlier in the order. In such a manner, the UE may accumulatively order DAI values in the feedback message according to a variety of rules. 
     However, the UE may encounter additional scenarios for which existing rules may not be applicable, and the UE may be unable to determine an order of DAI values. The rules described above, for example, may not cover situations where PDSCHs  220  are scheduled by DCIs  210  that are received over different scheduling serving cells. For instance, a UE may receive two DCIs  210  in a same monitoring occasion  215  over two different scheduling serving cells, where the two DCIs  210  each schedule PDSCHs  220  in a same scheduled serving cell. That is, the two PDSCHs  220  may be associated with a same scheduled serving cell index and a same monitoring occasion  215 , such that the first and second rules may not be useful in determining the order of the DAI values. Additionally, some existing rules (such as a start time rule) may be limited to ordering DAI values with the same scheduling serving cells. 
     According to the techniques described herein, a UE may support additional rules for ordering DAI values in a feedback message, and in particular, for PDSCHs  220  scheduled by DCIs  210  received over different scheduling serving cells. For example, during a first monitoring occasion, a UE may receive a first and second control information over a first and second serving cell, respectively, where the first and second control information each schedule a respective transmission for a third serving cell. In this example, the first and second serving cells may be considered scheduling serving cells, and the third serving cell may be considered a scheduled serving cell. In some cases, a scheduling serving cell may schedule itself (e.g., the first serving cell and the third serving cell may be the same serving cell). In any case, the UE may identify an index associated with each serving cell and may determine an order of DAI values according to the index and based on one or more rules. For example, the rule may be that a lower DAI value corresponds to a lower scheduling serving cell index. The UE may identify the indexes associated with the serving cells that are considered scheduling serving cells and may determine an order of DAI values to for first and second transmissions based on the indexes. Additionally, or alternatively, the rule may be that a lower DAI value corresponds to a lower scheduled serving cell index. The UE may identify the indexes associated with the serving cells that are considered scheduled serving cells and may determine an order of DAI values for the first and second transmissions. 
     As illustrated in  FIG.  2   , during a first monitoring occasion  215 , the UE may receive DCIs  210 - a  and  210 - c  over a serving cell  205 - b  and DCI  210 - b  over a serving cell  205 - c.  The DCIs  210 - a,    210 - b,  and  210 - c  may schedule a first, second, third, and fourth PDSCH  220  over serving cells  205 . As illustrated, DCI  210 - c  may schedule the first PDSCH  220  for serving cell  205 - a  and the fourth PDSCH  220  for serving cell  205 - c,  DCI  210 - a  may schedule the second PDSCH  220  for serving cell  205 - b,  and DCI  210 - b  may schedule the third PDSCH  220  for serving cell  205 - b.    
     During a second monitoring occasion  215 , the UE may receive DCI  210 - d  over serving cell  205 - b  and DCIs  210 - e  through  210 - g  over serving cell  205 - c.  DCIs  210 - d  through  210 - f  may schedule a fifth, sixth, and seventh PDSCH  220 , respectively, for serving cell  205 - b.  DCI  210 - g  may schedule an eighth PDSCH  220  for serving cell  205 - c.    
     The UE may receive PDSCHs  220  over the scheduled serving cells  205  according to the corresponding DCIs  210 , and may determine feedback for each PDSCH  220 . The UE may determine an order of DAI values to be used in the feedback message according to one or more rules. The UE may, for example, order DAI values in increasing order of the monitoring occasion  215 , the index of the scheduled serving cell  205 , the index of the scheduling serving cell  205 , the start time of the PDSCH  220 , or some combination thereof. In the example of  FIG.  2   , the UE may an order DAI values received in DCIs  210  in the first monitoring occasion  215  as lower (e.g., DAIs received in the first monitoring occasion  215  may be ordered lower because the first monitoring occasion occurs before the second monitoring occasion  215 ). 
     For PDSCHs  220  scheduled by DCIs  210  received in a same monitoring occasion  215 , such as the first through fourth DCIs  210 , the UE may determine an order of DAI values based on an order of the index of the scheduled serving cell. The UE may identify, for each PDSCH  220 , an index associated with the serving cell  205  for which the PDSCH  220  was scheduled. Serving cell  205 - a  may correspond to an index of 0, serving cell  205 - b  may correspond to an index of 1, and serving cell  205 - c  may correspond to an index of 2. The first PDSCH  220  may therefore be associated with a scheduled serving cell index of 0, the second and third PDSCHs  220  may be associated with a scheduled serving cell index of 1, and the fourth PDSCH  220  may be associated with a scheduled serving cell index of 2. Thus, the UE may determine an order of DAI values in an increasing order based on the scheduled serving cell index, such that the first PDSCH  220  is ordered to be lower (e.g., the lowest value), and the second and third PDSCHs  220  are ordered as lower than the fourth PDSCH  220 . 
     For PDSCHs  220  scheduled by DCIs  210  received in a same monitoring occasion  215  and associated with a same scheduled serving cell index, such as the second and third PDSCH  220 , the UE may determine an order of DAI values according to the index of the scheduling serving cell. Stated a different way, the DAI values may be ordered based on the serving cell  205  used to communicate the DCI  210  that scheduled the PDSCH  220 . For example, serving cell  205 - b  was used to communicate DCI  210 - a  that scheduled the second PDSCH  220 , and serving cell  205 - c  was used to communicate DCI  210 - b  that scheduled the third PDSCH  220 . The UE may identify that serving cell  205 - b  (e.g., the scheduling serving cell for the second PDSCH  220 ) is associated with an index of 1, and serving cell  205 - c  (e.g., the scheduling serving cell for the third PDSCH  220 ) is associated with an index of 2. As a non-limiting example, the UE may determine that DAI values for PDSCHs  220  that are associated with lower serving cell index values are ordered as lower than DAI values associated with higher serving cell index values. Thus, the UE may order a DAI value for the second PDSCH  220  to be lower than the DAI value assigned to the third PDSCH  220 . 
     The UE may determine an order of DAI values for the fifth through eighth PDSCHs  220  in a similar manner, as the fifth through eighth PDSCHs  220  are scheduled by DCIs  210  received in the same second monitoring occasion  215 . That is, the UE may determine an order of the DAI values in increasing order of the associated scheduled serving cell index and the associated scheduling serving cell index An order of DIA values for the fifth through seventh PDSCHs  220  may be determined based on the respective associated scheduling serving cell index. For instance, the fifth PDSCH  220  is scheduled by DCI  210 - d  that is received over serving cell  205 - b , while the sixth and seventh PDSCHs  220  are scheduled by DCIs  210 - e  and  210 - f  received over serving cell  205 - c.  The fifth PDSCH  220  therefore is associated with a scheduling serving cell index that is lower than the sixth and seventh PDSCHs  220  and may correspondingly be ordered as a lower DAI value. 
     Because the sixth and seventh PDSCHs  220  are associated with a same scheduling serving cell index, a same scheduled serving cell index, and a same monitoring occasion  215 , the UE may determine an order of DAI values for the sixth and seventh PDSCHs  220  based on a start time of each PDSCH  220 . For example, the UE may determine that a DAI value for a PDSCH  220  has a lower value because it has an earlier start time. Thus, the DAI value for the sixth PDSCH  220  may be ordered to be lower than the DAI value for the seventh PDSCH  220 , as the sixth PDSCH  220  starts earlier than the seventh PDSCH  220 . 
     The UE may transmit feedback information for the PDSCHs  220  in a feedback message via PUCCH  225 , where the feedback information may include an ACK or a NACK for each PDSCH  220 . The UE may construct a codebook based on ordering the DAI values, where the feedback is transmitted in an order corresponding to the DAI values. For instance, the UE may order the feedback in increasing order from the lowest DAI value to the highest DAI value, where the feedback for the first PDSCH  220  is transmitted first, followed by the feedback for the second PDSCH  220 , and so on, until feedback for every PDSCH  220  has been transmitted. 
       FIG.  3    illustrates an example of a transmission configuration  300  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. In some examples, the transmission configuration  300  may implement aspects of wireless communication system  100 . The transmission configuration  300  illustrates serving cells  305  over which a base station  105  and a UE  115 , as described with reference to  FIG.  1   , may communicate. For example, a base station may transmit, to a UE, DCIs  310  during monitoring occasions  315 . The DCIs  310  may schedule one or more transmissions, such as PDSCHs  320 . As described herein, the UE may determine an order between assignment indicator values (e.g., a DAI value) for each PDSCH  320 , where the assignment indicator values may be used to map the PDSCHs  320  to corresponding feedback (e.g., HARQ) information in a feedback message. The UE may transmit the feedback information for the PDSCHs  320  in a common PUCCH  325 . 
     As described with reference to  FIG.  2   , the UE may determine an order of assignment indicator values (e.g., DAIs) for each PDSCH  320  according to one or more rules, e.g., the UE may determine an order of DAI values based on one or more conditions. In the example of  FIG.  3   , the UE may determine an order of DAI values according to a set of rules in addition to or as an alternative to those described with reference to  FIG.  2   . For example, the UE may determine an order of DAI values according to the monitoring occasion  315  in which the DCIs  310  scheduling the PDSCHs  320  were received or based on an index associated with the scheduled serving cell and/or the scheduling serving cell of the PDSCH  320 . If, however, PDSCHs  320  are received in the same monitoring occasion  315  and are associated with the same scheduled serving cell index, the UE may determine an order of DAI values based on start times of the PDSCHs  320 . 
     As illustrated in  FIG.  3   , during a first monitoring occasion  315 , the UE may receive DCIs  310 - a  and  310 - c  over a serving cell  305 - c  and DCI  310 - b  over a serving cell  305 - b . The DCIs  310 - a ,  310 - b , and  310 - c  may each schedule PDSCHs  320  over serving cells  305 . The DCIs  310 - a,    310 - b,  and  310 - c  may include DAIs for the scheduled PDSCHs  320 . As illustrated, DCI  310 - a  may schedule a first PDSCH  320  for serving cell  305 - b,  DCI  310 - b  may schedule a second PDSCH  320  for serving cell  305 - b,  and DCI  310 - c  may schedule a third PDSCH  320  for serving cell  305 - c  and a fourth PDSCH  320  for serving cell  305 - a . During a second monitoring occasion  315 , the UE may receive DCI  310 - e  over serving cell  305 - b  and DCIs  310 - d ,  310 - f , and  310 - g  over serving cell  305 - c . DCIs  310 - d  through  310 - f  may schedule a fifth, sixth, and seventh PDSCH  320 , respectively, for serving cell  305 - b . DCI  310 - g  may schedule an eighth PDSCH  320  for serving cell  305 - c.    
     The UE may receive PDSCHs  320  over the scheduled serving cells  305  according to the corresponding DCIs  310 , and may determine feedback for each PDSCH  320 . The UE may determine an order of DAI values for each PDSCH  320  to be used in the feedback message based on the monitoring occasion  315 , e.g., the UE may determine that DAI values for PDSCHs  320  scheduled by DCIs  310  received in the first monitoring occasion  315  are lower in the order than DAI values for PDSCHs  320  scheduled by DCIs  310  received in the second monitoring occasion  315 , as the first monitoring occasion  315  occurs before the second monitoring occasion  315 . 
     For PDSCHs  320  scheduled by DCIs  310  received in a same monitoring occasion  315 , such as the first through fourth DCIs  310 , the UE may determine an order of DAI values based on an order of the index of the scheduled serving cell. The UE may identify, for each PDSCH  320 , an index associated with the serving cell  305  for which the PDSCH  320  was scheduled. Serving cell  305 - a  may correspond to an index of 0, serving cell  305 - b  may correspond to an index of 1, and serving cell  305 - c  may correspond to an index of 3. The fourth PDSCH  320  may therefore be associated with a scheduled serving cell index of 0, the first and second PDSCHs  320  may be associated with a scheduled serving cell index of 1, and the third PDSCH  320  may be associated with a scheduled serving cell index of 2. Thus, the UE may determine an order of DAI values in an increasing order based on the scheduled serving cell index, such that the fourth PDSCH  320  is ordered to be the lowest DAI value, and the first and second PDSCHs  320  are ordered to be lower than the DAI value for the third PDSCH  320 . 
     For PDSCHs  320  scheduled by DCIs  310  received in a same monitoring occasion  315  and associated with a same scheduled serving cell index, such as the first and second PDSCH  320 , the UE may determine an order of DAI values according to the start time of the PDSCHs. The UE may identify the start time of each of the first and second PDSCHs  320  and may determine an order of a DAI value accordingly. For example, a lower DAI value may correspond to an earlier start time. 
     The UE may determine an order of DAI values for the fifth through eighth PDSCHs  320  in a similar manner, as the fifth through eighth PDSCHs  320  are scheduled by DCIs  310  received in the same second monitoring occasion  315 . That is, the UE may determine an order of the DAI values in increasing order of the associated scheduled serving cell index and the start time of the PDSCHs  320 . The fifth through seventh PDSCHs  320  are scheduled for serving cell  305 - b  associated with an index of 1, and may therefore be assigned a lower DAI value than the eighth PDSCH  320  scheduled for serving cell  305 - c  associated with an index of 3. The fifth through seventh PDSCHs  320  may be assigned DAI values based on their respective start times. For instance, the fifth PDSCH  320  starts earlier than the sixth PDSCH  320 , which in turn starts earlier than the seventh PDSCH  320 . The UE may determine that a DAI value for a PDSCH  320  that has an earlier start time is lower in the order. Thus, the fifth through seventh PDSCHs  320  may be ordered in increasing order, e.g., the fifth PDSCH  320  has a lower value than the sixth PDSCH  320  in the order, which in turn has a lower value than the seventh PDSCH  320  in the order. 
     The UE may transmit feedback information for the PDSCHs  320  in a feedback message via PUCCH  325 , where the feedback information may include an ACK or a NACK for each PDSCH  320 . The UE may construct a codebook based on ordering the DAI values, where the feedback is transmitted in an order corresponding to the DAI values. For instance, the UE may order the feedback in increasing order from the lowest DAI value to the highest DAI value, where the feedback for the first PDSCH  320  is transmitted first, followed by the feedback for the second PDSCH  320 , and so on, until feedback for every PDSCH  320  has been transmitted. 
       FIG.  4    illustrates an example of a process flow  400  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. In some examples, the process flow  400  may implement aspects of wireless communication system  100 . For example, process flow  400  may include a base station  105 - a  and a UE  115 - a , which may be examples of corresponding wireless devices as described herein. In the following description of the process flow  400 , the operations between the UE  115 - a  and the base station  105 - a  may be transmitted in a different order than the order shown, or the operations performed by the UE  115 - a  and the base station  105 - a  may be performed in different orders or at different times. Certain operations may also be left out of the process flow  400 , or other operations may be added to the process flow  400 . While the UE  115 - a  and the base station  105 - a  are shown performing operations of process flow  400 , any wireless device may perform the operations shown. Further, while  FIG.  4    illustrates an example of communications between a UE  115 - a  and a base station  105 - a , the techniques described herein may be applied to communications between any number of wireless devices. 
     The base station  105 - a  and the UE  115 - a  may communicate using one or more cells and/or component carriers, such as serving cells, primary cells, secondary cells, or some combination thereof, among other examples. During a monitoring occasion, the base station  105 - a  may transmit, to the UE  115 - a , control information that schedules transmissions for the UE  115 - a . The control information may be transmitted over a first serving cell, which may be referred to as a scheduling serving cell, and may schedule transmissions for the first serving cell or for one or more other serving cells, which may be referred to as scheduled serving cells. 
     At  405 , the base station  105 - a  may transmit a first control information (e.g., a first DCI) over a first serving cell (e.g., a first scheduling serving cell) and a second control information (e.g., a second DCI) over a second serving cell (e.g., a second scheduling serving cell) during a first monitoring occasion (e.g., a PMO). The first and second DCI may schedule a first and second transmission (e.g., a PDSCH, an SPS release), respectively, for a third serving cell (e.g., a first scheduled serving cell). In some aspects, the third serving cell may be the first serving cell; that is, the first and second serving cells may both schedule transmissions for the first serving cell. In some examples, the first serving cell may be a primary cell and the second serving cell may be a secondary cell. 
     In some examples, the base station  105 - a  may transmit a third control information (e.g., a third DCI) over the first serving cell during the same monitoring occasion. In some cases, the third DCI schedules a third transmission for the third serving cell, while in other cases, the third DCI schedules a third transmission for a fourth serving cell (e.g., a second scheduled serving cell). 
     In some examples, at  410 , the base station  105 - a  may transmit the third DCI during a second monitoring occasion different than the first monitoring occasion. The second monitoring occasion may occur after the first monitoring occasion. 
     At  415 , the base station  105 - a  may transmit, and the UE  115 - a  may receive, the transmissions scheduled by the DCIs over the respective serving cells. 
     At  420 , the UE  115 - a  may identify indexes associated with each serving cell. The UE  115 - a  may identify a first index associated with the first serving cell and a second index associated with the second cell. In some cases, the UE  115 - a  may optionally identify a third index of the third serving cell (e.g., scheduled by the first, second, and/or third DCIs). Additionally, the UE  115 - a  may optionally identify a fourth index of the fourth serving cell (e.g., scheduled by the third DCI). 
     At  425 , in some examples, the UE  115 - a  may identify start times for the scheduled transmissions. If, for instance, the UE  115 - a  receives a third DCI at  405  (e.g., during the first monitoring occasion and over the first serving cell) that schedules a third transmission for the third serving cell, the UE  115 - a  may identify a first start time for the first transmission and a second start time for the third transmission. 
     At  430 , the UE  115 - a  may determine an order of assignment indicator values (e.g., DAI values) associated with HARQ/ACK feedback for the scheduled transmissions based on the indexes identified at  420 , the start times identified at  425 , the corresponding monitoring occasions, or some combination thereof. The UE  115 - a  may determine an order between a first DAI value for the first transmission and a second DAI value for the second transmission based on the first index of the first serving cell and the second index of the second serving cell. That is, the DAI values may be order based on the indexes of the serving cells used to communicate the DCIs that scheduled the transmissions, for DCIs received in a same monitoring occasion. Stated another way, the DAI values for each transmission may be ordered in the feedback message based on the respective scheduling serving cell indexes. For example, the UE  115 - a  may determine an order between the first and second DAI values in increasing order of the serving cell indexes, such that a lower value of the first DAI value corresponds to a lower serving cell index value. 
     In cases where the UE  115 - a  receives a third DCI scheduling a third transmission, the UE  115 - a  may determine an order between a DAI value to the third transmission at  430  and the other DAI values. In some examples, receiving a third DCI scheduling a third transmission may also change the order of the DAI values. For example, the third transmission may be scheduled for the third serving cell by the third DCI, and the third DCI may be received in the first monitoring occasion (i.e., the same monitoring occasion as the first and second DCIs) and over the first serving cell. Thus, the third transmission may be associated with a scheduling serving cell index that is the same as the first transmission. In such examples, the UE  115 - a  may use the start time(s) identified at  425 , in addition to the serving cell indexes, to order DAI values. As an illustrative example, the UE  115 - a  may determine an order between DAI values for the first transmission and the third transmission based on the start time of the first transmission and the start time of the third transmission, where a lower value of the DAI corresponds to an earlier start time. 
     If the third DCI is received by the UE  115 - a  in the second monitoring occasion, the UE  115 - a  may determine an order of the DAI value for the third transmission relative to the other DAI values based on the second monitoring occasion occurring after the monitoring occasion, for instance, where a higher DAI value corresponds to the second monitoring occasion occurring after the first monitoring occasion (and a lower DAI value of the first and/or second transmissions correspond to the first monitoring occasion occurring before the second monitoring occasion). 
     Alternatively, if the third DCI schedules the third transmission for the fourth serving cell, the UE  115 - a  may determine an order of DAI values for the third transmission relative to other DAI values based on the index of the third serving cell (e.g., scheduled by the first and second control information) and the fourth serving cell. That is, the UE  115 - a  may determine an order between DAI values for transmissions based on the indexes of the scheduled serving cells. The third serving cell and the fourth serving cell may be associated with respective serving cell indexes and the UE  115 - a  may use these indexes to determine an order of a DAI value for the third transmission relative to the other DAI values, where a lower DAI value may correspond to a lower serving cell index. 
     At  435 , the UE  115 - a  may transmit, to the base station  105 - a , feedback information for at least the first and second transmissions based on the DAI values ordered at  430 . The feedback information may include a HARQ/ACK or a HARQ/NACK for each transmission. In some examples, the feedback information may be transmitted over a PUCCH. 
       FIG.  5    illustrates an example of a process flow  500  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. In some examples, the process flow  500  may implement aspects of wireless communication system  100 . For example, process flow  500  may include a base station  105 - b  and a UE  115 - b , which may be examples of corresponding wireless devices as described herein. In the following description of the process flow  500 , the operations between the UE  115 - b  and the base station  105 - b  may be transmitted in a different order than the order shown, or the operations performed by the UE  115 - b  and the base station  105 - b  may be performed in different orders or at different times. Certain operations may also be left out of the process flow  500 , or other operations may be added to the process flow  500 . While the UE  115 - b  and the base station  105 - b  are shown performing operations of process flow  500 , any wireless device may perform the operations shown. Further, while  FIG.  5    illustrates an example of communications between a UE  115 - b  and a base station  105 - b , the techniques described herein may be applied to communications between any number of wireless devices. 
     The base station  105 - b  and the UE  115 - b  may communicate using one or more cells and/or component carriers, such as serving cells, primary cells, secondary cells, or some combination thereof, among other examples. During a monitoring occasion, the base station  105 - b  may transmit, to the UE  115 - b,  control information that schedules transmissions for the UE  115 - b . The control information may be transmitted over a serving cell, which may be referred to as a scheduling serving cell, and may schedule transmissions for the serving cell or for one or more other serving cells, which may be referred to as scheduled serving cells. 
     At  505 , the base station  105 - b  may transmit a first control information (e.g., a first DCI) over a first serving cell (e.g., a first scheduling serving cell) and a second control information (e.g., a second DCI) over a second serving cell (e.g., a second scheduling serving cell) during a first monitoring occasion (e.g., a PMO). The first and second DCI may schedule a first and second transmission (e.g., a PDSCH, an SPS release), respectively, for a third serving cell (e.g., a first scheduled serving cell). In some aspects, the third serving cell may be the first serving cell; that is, the first and second serving cells may both schedule transmissions for the first serving cell. Alternatively, the third serving cell may be different from the first serving cell and the second serving cell. 
     In some cases, the first and second serving cells may be the same. In some examples, the first serving cell may be a primary cell and the second serving cell may be a secondary cell. In some aspects, the first transmission may be scheduled by both the first and second DCIs transmitted over the first and second serving cells, respectively. 
     In some examples, the base station  105 - b  may transmit a third control information (e.g., a third DCI) over the first serving cell during the same monitoring occasion. In some cases, the third DCI schedules a third transmission for the third serving cell, while in other cases, the third DCI schedules a third transmission for a fourth serving cell (e.g., a second scheduled serving cell). 
     In some examples, at  510 , the base station  105 - b  may transmit the third DCI during a second monitoring occasion different than the first monitoring occasion. The second monitoring occasion may occur after the first monitoring occasion. 
     At  515 , the base station  105 - b  may transmit, and the UE  115 - b  may receive, the transmissions scheduled by the DCIs over the respective serving cells. 
     At  520 , the UE  115 - b  may identify start times for the scheduled transmissions. For example, the UE  115 - b  may identify a first start time for the first transmission and a second start time for the second transmission. 
     At  525 , in some examples, the UE  115 - b  may identify indexes associated with each serving cell. The UE  115 - b  may identify a first index associated with the first serving cell, a second index associated with the second cell, and a third index associated with the third serving cell. If the UE  115 - b  receives the third DCI scheduling the third transmission for the fourth serving cell, the UE  115 - b  may optionally identify a fourth index of the fourth serving cell (e.g., scheduled by the third DCI). 
     At  530 , the UE  115 - b  may determine an order of assignment indicator values (e.g., DAI values) associated with HARQ/ACK feedback to the scheduled transmissions based on the start times identified at  520 , the indexes identified at  525 , the corresponding monitoring occasions, or some combination thereof. The UE  115 - b  may determine an order between a first DAI value for the first transmission and a second DAI value for the second transmission based on the start times of the respective transmissions. In some examples, a lower DAI value may correspond to an earlier start time (e.g., a transmission with an earlier start time may be ordered to be a lower in the order). 
     In cases where the UE  115 - b  receives a third DCI scheduling a third transmission, the UE  115 - b  may determine an order of a DAI value for the third transmission at  530  relative to other DAI values in the feedback message. In some examples, the UE  115 - b  may determine an order between the DAI values based on a start time of the third transmission, e.g., in the same manner that the UE  115 - b  orders the DAI value of the first and second transmissions. Additionally, or alternatively, the UE  115 - b  may determine an order of the DAI value based on the indexes identified at  525 . For example, the UE  115 - b  may determine an order of the DAI value based on the index of the serving cell scheduled by the third DCI (e.g., the third index identified at  525 ) and/or the index of the serving cell scheduled by the first and second DCI (e.g., the fourth index identified at  525 ). The DAI values may be ordered in increasing order of the serving cell indexes, such that a lower DAI value corresponds to a lower serving cell index value. 
     If the third DCI is received by the UE  115 - b  in the second monitoring occasion, the UE  115 - b  may determine an order of the DAI value for the third transmission relative to the other DAIs in the feedback message based on the second monitoring occasion occurring after the monitoring occasion, for instance, where a higher DAI value corresponds to the second monitoring occasion occurring after the first monitoring occasion (and a lower DAI value of the first and/or second transmissions correspond to the first monitoring occasion occurring before the second monitoring occasion). 
     At  535 , the UE  115 - b  may transmit, to the base station  105 - b , feedback information for at least the first and second transmissions based on the DAI values ordered at  530 . The feedback information may include a HARQ/ACK or a HARQ/NACK for each transmission. In some examples, the feedback information may be transmitted over a PUCCH. 
       FIG.  6    shows a block diagram  600  of a device  605  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The device  605  may be an example of aspects of a UE  115  as described herein. The device  605  may include a receiver  610 , a transmitter  615 , and a communications manager  620 . The device  605  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  610  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to assignment indexes for dynamic feedback). Information may be passed on to other components of the device  605 . The receiver  610  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  615  may provide a means for transmitting signals generated by other components of the device  605 . For example, the transmitter  615  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to assignment indexes for dynamic feedback). In some examples, the transmitter  615  may be co-located with a receiver  610  in a transceiver module. The transmitter  615  may utilize a single antenna or a set of multiple antennas. 
     The communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations thereof or various components thereof may be examples of means for performing various aspects of assignment indexes for dynamic feedback as described herein. For example, the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may support a method for performing one or more of the functions described herein. 
     In some examples, the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory). 
     Additionally, or alternatively, in some examples, the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure). 
     In some examples, the communications manager  620  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  610 , the transmitter  615 , or both. For example, the communications manager  620  may receive information from the receiver  610 , send information to the transmitter  615 , or be integrated in combination with the receiver  610 , the transmitter  615 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  620  may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager  620  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The communications manager  620  may be configured as or otherwise support a means for identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information. The communications manager  620  may be configured as or otherwise support a means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Additionally, or alternatively, the communications manager  620  may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager  620  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The communications manager  620  may be configured as or otherwise support a means for identifying a first start time for the first transmission and a second start time for the second transmission. The communications manager  620  may be configured as or otherwise support a means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     By including or configuring the communications manager  620  in accordance with examples as described herein, the device  605  (e.g., a processor controlling or otherwise coupled to the receiver  610 , the transmitter  615 , the communications manager  620 , or a combination thereof) may support techniques for assigning assignment indicator values when different scheduling cells in a same monitoring occasion schedule transmissions in a same scheduled cell. The device  605  may thus group feedback for the transmissions into a common feedback message, which may provide more efficient utilization of communication resources at the device  605 . 
       FIG.  7    shows a block diagram  700  of a device  705  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The device  705  may be an example of aspects of a device  605  or a UE  115  as described herein. The device  705  may include a receiver  710 , a transmitter  715 , and a communications manager  720 . The device  705  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  710  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to assignment indexes for dynamic feedback). Information may be passed on to other components of the device  705 . The receiver  710  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  715  may provide a means for transmitting signals generated by other components of the device  705 . For example, the transmitter  715  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to assignment indexes for dynamic feedback). In some examples, the transmitter  715  may be co-located with a receiver  710  in a transceiver module. The transmitter  715  may utilize a single antenna or a set of multiple antennas. 
     The device  705 , or various components thereof, may be an example of means for performing various aspects of assignment indexes for dynamic feedback as described herein. For example, the communications manager  720  may include a control information receiver  725 , an index identifying component  730 , an assignment indicator value component  735 , a start time identifying component  740 , or any combination thereof. The communications manager  720  may be an example of aspects of a communications manager  620  as described herein. In some examples, the communications manager  720 , or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  710 , the transmitter  715 , or both. For example, the communications manager  720  may receive information from the receiver  710 , send information to the transmitter  715 , or be integrated in combination with the receiver  710 , the transmitter  715 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  720  may support wireless communication at a UE in accordance with examples as disclosed herein. The control information receiver  725  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The index identifying component  730  may be configured as or otherwise support a means for identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information. The assignment indicator value component  735  may be configured as or otherwise support a means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Additionally, or alternatively, the communications manager  720  may support wireless communication at a UE in accordance with examples as disclosed herein. The control information receiver  725  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The start time identifying component  740  may be configured as or otherwise support a means for identifying a first start time for the first transmission and a second start time for the second transmission. The assignment indicator value component  735  may be configured as or otherwise support a means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
       FIG.  8    shows a block diagram  800  of a communications manager  820  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The communications manager  820  may be an example of aspects of a communications manager  620 , a communications manager  720 , or both, as described herein. The communications manager  820 , or various components thereof, may be an example of means for performing various aspects of assignment indexes for dynamic feedback as described herein. For example, the communications manager  820  may include a control information receiver  825 , an index identifying component  830 , an assignment indicator value component  835 , a start time identifying component  840 , a feedback transmitter  845 , or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses). 
     The communications manager  820  may support wireless communication at a UE in accordance with examples as disclosed herein. The control information receiver  825  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The index identifying component  830  may be configured as or otherwise support a means for identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information. The assignment indicator value component  835  may be configured as or otherwise support a means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     In some examples, the control information receiver  825  may be configured as or otherwise support a means for receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell. In some examples, the start time identifying component  840  may be configured as or otherwise support a means for identifying a first start time for the first transmission scheduled by the first serving cell and a second start time for the third transmission scheduled by the first serving cell, where determining the order of the first assignment indicator value and the second assignment indicator value is based on the first start time and the second start time. 
     In some examples, the assignment indicator value component  835  may be configured as or otherwise support a means for determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the first index of the first serving cell used to communicate the third control information, the first start time, and the second start time. 
     In some examples, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to an earlier start time of the first start time and the second start time. 
     In some examples, the control information receiver  825  may be configured as or otherwise support a means for receiving, during a second monitoring occasion after the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell. In some examples, the assignment indicator value component  835  may be configured as or otherwise support a means for determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the second monitoring occasion occurring after the monitoring occasion. 
     In some examples, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to the monitoring occasion occurring before the second monitoring occasion. 
     In some examples, the control information receiver  825  may be configured as or otherwise support a means for receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for a fourth serving cell. In some examples, the index identifying component  830  may be configured as or otherwise support a means for identifying a third index of the third serving cell scheduled by the first control information and the second control information and a fourth index of the fourth serving cell scheduled by the third control information. In some examples, the assignment indicator value component  835  may be configured as or otherwise support a means for determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the third index and the fourth index. 
     In some examples, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to a lower index value of the third index associated with the third serving cell and the fourth index associated with the fourth serving cell. 
     In some examples, the feedback transmitter  845  may be configured as or otherwise support a means for transmitting feedback information for the first transmission and the second transmission based on determining the order between the first assignment indicator value and the second assignment indicator value. 
     In some examples, the feedback information includes a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     In some examples, the feedback information is communicated over a physical uplink control channel. In some examples, the first serving cell includes a primary cell. In some examples, the second serving cell includes a secondary cell. 
     In some examples, the first assignment indicator value includes a value of a DAI. In some examples, a lower value of the first assignment indicator value and the second assignment indicator value corresponds to a lower index value of the first index associated with the first serving cell and the second index associated with the second serving cell. 
     In some examples, the first transmission or the second transmission is communicated over a physical downlink shared channel or includes a release of semi-persistent scheduling resources. 
     In some examples, the third serving cell scheduled by the first control information and the second control information includes the first serving cell. In some examples, the third serving cell scheduled by the first control information and the second control information is different than the first serving cell and the second serving cell. 
     Additionally, or alternatively, the communications manager  820  may support wireless communication at a UE in accordance with examples as disclosed herein. In some examples, the control information receiver  825  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The start time identifying component  840  may be configured as or otherwise support a means for identifying a first start time for the first transmission and a second start time for the second transmission. In some examples, the assignment indicator value component  835  may be configured as or otherwise support a means for determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     In some examples, the first serving cell is different than the second serving cell. 
     In some examples, the first transmission is scheduled in the third serving cell using the first control information communicated over the first serving cell and the second control information communicated over the second serving cell that is different than the first serving cell. 
     In some examples, the control information receiver  825  may be configured as or otherwise support a means for receiving, during a second monitoring occasion after the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell. In some examples, the assignment indicator value component  835  may be configured as or otherwise support a means for determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the second monitoring occasion occurring after the monitoring occasion. 
     In some examples, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to the monitoring occasion occurring before the second monitoring occasion. 
     In some examples, the control information receiver  825  may be configured as or otherwise support a means for receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for a fourth serving cell. In some examples, the index identifying component  830  may be configured as or otherwise support a means for identifying a third index of the third serving cell scheduled by the first control information and the second control information and a fourth index of the fourth serving cell scheduled by the third control information. In some examples, the assignment indicator value component  835  may be configured as or otherwise support a means for determining the order between a third assignment indicator value to the third transmission, the first assignment indicator value, and the second assignment indicator value based on the third index and the fourth index. 
     In some examples, a lower value of the first assignment indicator value and the third assignment indicator value corresponds to a lower index value of the third index associated with the third serving cell and the fourth index associated with the fourth serving cell. 
     In some examples, the feedback transmitter  845  may be configured as or otherwise support a means for transmitting feedback information for the first transmission and the second transmission based on determining the order between the first assignment indicator value and the second assignment indicator value, where the feedback information includes a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     In some examples, the feedback information includes a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. In some examples, the feedback information is communicated over a physical uplink control channel. 
     In some examples, the first serving cell includes a primary cell. In some examples, the second serving cell includes a secondary cell. 
     In some examples, the first assignment indicator value includes a value of a DAI. In some examples, a lower value of the first assignment indicator value and the second assignment indicator value corresponds to an earlier start time of the first start time and the second start time. 
     In some examples, the first transmission or the second transmission is communicated over a physical downlink shared channel or includes a release of semi-persistent scheduling resources. 
     In some examples, the third serving cell scheduled by the first control information and the second control information includes the first serving cell. In some examples, the third serving cell scheduled by the first control information and the second control information is different than the first serving cell and the second serving cell. 
       FIG.  9    shows a diagram of a system  900  including a device  905  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The device  905  may be an example of or include the components of a device  605 , a device  705 , or a UE  115  as described herein. The device  905  may communicate wirelessly with one or more base stations  105 , UEs  115 , or any combination thereof. The device  905  may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager  920 , an input/output (I/O) controller  910 , a transceiver  915 , an antenna  925 , a memory  930 , code  935 , and a processor  940 . These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus  945 ). 
     The I/O controller  910  may manage input and output signals for the device  905 . The I/O controller  910  may also manage peripherals not integrated into the device  905 . In some cases, the I/O controller  910  may represent a physical connection or port to an external peripheral. In some cases, the I/O controller  910  may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/ 2 ®, UNIX®, LINUX®, or another known operating system. Additionally, or alternatively, the I/O controller  910  may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller  910  may be implemented as part of a processor, such as the processor  940 . In some cases, a user may interact with the device  905  via the I/O controller  910  or via hardware components controlled by the I/O controller  910 . 
     In some cases, the device  905  may include a single antenna  925 . However, in some other cases, the device  905  may have more than one antenna  925 , which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver  915  may communicate bi-directionally, via the one or more antennas  925 , wired, or wireless links as described herein. For example, the transceiver  915  may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver  915  may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas  925  for transmission, and to demodulate packets received from the one or more antennas  925 . The transceiver  915 , or the transceiver  915  and one or more antennas  925 , may be an example of a transmitter  615 , a transmitter  715 , a receiver  610 , a receiver  710 , or any combination thereof or component thereof, as described herein. 
     The memory  930  may include random access memory (RAM) and read-only memory (ROM). The memory  930  may store computer-readable, computer-executable code  935  including instructions that, when executed by the processor  940 , cause the device  905  to perform various functions described herein. The code  935  may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code  935  may not be directly executable by the processor  940  but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory  930  may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices. 
     The processor  940  may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor  940  may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor  940 . The processor  940  may be configured to execute computer-readable instructions stored in a memory (e.g., the memory  930 ) to cause the device  905  to perform various functions (e.g., functions or tasks supporting assignment indexes for dynamic feedback). For example, the device  905  or a component of the device  905  may include a processor  940  and memory  930  coupled to the processor  940 , the processor  940  and memory  930  configured to perform various functions described herein. 
     The communications manager  920  may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager  920  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and the second control information schedules a second transmission for the third serving cell. The communications manager  920  may be configured as or otherwise support a means for identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information. The communications manager  920  may be configured as or otherwise support a means for assigning a first assignment indicator value to the first transmission and a second assignment indicator value to the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Additionally, or alternatively, the communications manager  920  may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager  920  may be configured as or otherwise support a means for receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and the second control information schedules a second transmission for the third serving cell. The communications manager  920  may be configured as or otherwise support a means for identifying a first start time for the first transmission and a second start time for the second transmission. The communications manager  920  may be configured as or otherwise support a means for assigning a first assignment indicator value to the first transmission and a second assignment indicator value to the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     By including or configuring the communications manager  920  in accordance with examples as described herein, the device  905  may support techniques for assigning assignment indicator values when different scheduling cells in a same monitoring occasion schedule transmissions in a same scheduled cell. The device  905  may thus group feedback for the transmissions into a common feedback message. Grouping feedback information may reduce the number of overall feedback transmissions, thereby reducing system overhead and improving communications efficiency. 
     In some examples, the communications manager  920  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver  915 , the one or more antennas  925 , or any combination thereof. Although the communications manager  920  is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager  920  may be supported by or performed by the processor  940 , the memory  930 , the code  935 , or any combination thereof. For example, the code  935  may include instructions executable by the processor  940  to cause the device  905  to perform various aspects of assignment indexes for dynamic feedback as described herein, or the processor  940  and the memory  930  may be otherwise configured to perform or support such operations. 
       FIG.  10    shows a flowchart illustrating a method  1000  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The operations of the method  1000  may be implemented by a UE or its components as described herein. For example, the operations of the method  1000  may be performed by a UE  115  as described with reference to  FIGS.  1  through  9   . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1005 , the method may include receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The operations of  1005  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1005  may be performed by a control information receiver  825  as described with reference to  FIG.  8   . 
     At  1010 , the method may include identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information. The operations of  1010  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1010  may be performed by an index identifying component  830  as described with reference to  FIG.  8   . 
     At  1015 , the method may include determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a HARQ/ACK feedback. The operations of  1015  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1015  may be performed by an assignment indicator value component  835  as described with reference to  FIG.  8   . 
       FIG.  11    shows a flowchart illustrating a method  1100  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The operations of the method  1100  may be implemented by a UE or its components as described herein. For example, the operations of the method  1100  may be performed by a UE  115  as described with reference to  FIGS.  1  through  9   . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1105 , the method may include receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The operations of  1105  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1105  may be performed by a control information receiver  825  as described with reference to  FIG.  8   . 
     At  1110 , the method may include receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell. The operations of  1110  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1110  may be performed by a control information receiver  825  as described with reference to  FIG.  8   . 
     At  1115 , the method may include identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information. The operations of  1115  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1115  may be performed by an index identifying component  830  as described with reference to  FIG.  8   . 
     At  1120 , the method may include identifying a first start time for the first transmission scheduled by the first serving cell and a second start time for the third transmission scheduled by the first serving cell. The operations of  1120  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1120  may be performed by a start time identifying component  840  as described with reference to  FIG.  8   . 
     At  1125 , the method may include determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, where assigning the first assignment indicator value is based on the first start time and the second start time, and where the first assignment indicator value and the second assignment indicator value are associated with a HARQ/ACK feedback. The operations of  1125  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1125  may be performed by an assignment indicator value component  835  as described with reference to  FIG.  8   . 
     At  1130 , the method may include determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the first index of the first serving cell used to communicate the third control information, the first start time, and the second start time. The operations of  1130  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1130  may be performed by an assignment indicator value component  835  as described with reference to  FIG.  8   . 
       FIG.  12    shows a flowchart illustrating a method  1200  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The operations of the method  1200  may be implemented by a UE or its components as described herein. For example, the operations of the method  1200  may be performed by a UE  115  as described with reference to  FIGS.  1  through  9   . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1205 , the method may include receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The operations of  1205  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1205  may be performed by a control information receiver  825  as described with reference to  FIG.  8   . 
     At  1210 , the method may include identifying a first start time for the first transmission and a second start time for the second transmission. The operations of  1210  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1210  may be performed by a start time identifying component  840  as described with reference to  FIG.  8   . 
     At  1215 , the method may include determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a HARQ/ACK feedback. The operations of  1215  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1215  may be performed by an assignment indicator value component  835  as described with reference to  FIG.  8   . 
       FIG.  13    shows a flowchart illustrating a method  1300  that supports assignment indexes for dynamic feedback in accordance with aspects of the present disclosure. The operations of the method  1300  may be implemented by a UE or its components as described herein. For example, the operations of the method  1300  may be performed by a UE  115  as described with reference to  FIGS.  1  through  9   . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1305 , the method may include receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, where the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission. The operations of  1305  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1305  may be performed by a control information receiver  825  as described with reference to  FIG.  8   . 
     At  1310 , the method may include identifying a first start time for the first transmission and a second start time for the second transmission. The operations of  1310  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1310  may be performed by a start time identifying component  840  as described with reference to  FIG.  8   . 
     At  1315 , the method may include determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based on the first start time for the first transmission and the second start time for the second transmission, where the first assignment indicator value and the second assignment indicator value are associated with a HARQ/ACK feedback. The operations of  1315  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1315  may be performed by an assignment indicator value component  835  as described with reference to  FIG.  8   . 
     At  1320 , the method may include receiving, during a second monitoring occasion after the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell. The operations of  1320  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1320  may be performed by a control information receiver  825  as described with reference to  FIG.  8   . 
     At  1325 , the method may include determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based on the second monitoring occasion occurring after the monitoring occasion. The operations of  1325  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1325  may be performed by an assignment indicator value component  835  as described with reference to  FIG.  8   . 
     The following provides an overview of aspects of the present disclosure: 
     Aspect 1: A method for wireless communication at a UE, comprising: receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, wherein the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission; identifying a first index associated with the first serving cell used to communicate the first control information and a second index associated with the second serving cell used to communicate the second control information; and determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based at least in part on the first index of the first serving cell used to communicate the first control information and the second index of the second serving cell used to communicate the second control information, the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Aspect 2: The method of aspect 1, further comprising: receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell; and identifying a first start time for the first transmission scheduled by the first serving cell and a second start time for the third transmission scheduled by the first serving cell, wherein determining the order of the first assignment indicator value and the second assignment indicator value is based at least in part on the first start time and the second start time. 
     Aspect 3: The method of aspect 2, further comprising: determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based at least in part on the first index of the first serving cell used to communicate the third control information, the first start time, and the second start time. 
     Aspect 4: The method of aspect 3, wherein a lower value of the first assignment indicator value and the third assignment indicator value corresponds to an earlier start time of the first start time and the second start time. 
     Aspect 5: The method of any of aspects 1 through 4, further comprising: receiving, during a second monitoring occasion after the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell; and determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based at least in part on the second monitoring occasion occurring after the monitoring occasion. 
     Aspect 6: The method of aspect 5, wherein a lower value of the first assignment indicator value and the third assignment indicator value corresponds to the monitoring occasion occurring before the second monitoring occasion. 
     Aspect 7: The method of any of aspects 1 through 6, further comprising: receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for a fourth serving cell; identifying a third index of the third serving cell scheduled by the first control information and the second control information and a fourth index of the fourth serving cell scheduled by the third control information; and determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based at least in part on the third index and the fourth index. 
     Aspect 8: The method of aspect 7, wherein a lower value of the first assignment indicator value and the third assignment indicator value corresponds to a lower index value of the third index associated with the third serving cell and the fourth index associated with the fourth serving cell. 
     Aspect 9: The method of any of aspects 1 through 8, further comprising: transmitting feedback information for the first transmission and the second transmission based at least in part on determining the order between the first assignment indicator value and the second assignment indicator value. 
     Aspect 10: The method of aspect 9, wherein the feedback information comprises a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     Aspect 11: The method of any of aspects 9 through 10, wherein the feedback information is communicated over a physical uplink control channel. 
     Aspect 12: The method of any of aspects 1 through 11, wherein the first serving cell comprises a primary cell; and the second serving cell comprises a secondary cell. 
     Aspect 13: The method of any of aspects 1 through 12, wherein the first assignment indicator value comprises a value of a downlink assignment indicator (DAI). 
     Aspect 14: The method of any of aspects 1 through 13, wherein a lower value of the first assignment indicator value and the second assignment indicator value corresponds to a lower index value of the first index associated with the first serving cell and the second index associated with the second serving cell. 
     Aspect 15: The method of any of aspects 1 through 14, wherein the first transmission or the second transmission is communicated over a physical downlink shared channel or comprises a release of semi-persistent scheduling resources. 
     Aspect 16: The method of any of aspects 1 through 15, wherein the third serving cell scheduled by the first control information and the second control information comprises the first serving cell. 
     Aspect 17: The method of any of aspects 1 through 16, wherein the third serving cell scheduled by the first control information and the second control information is different than the first serving cell and the second serving cell. 
     Aspect 18: A method for wireless communication at a UE, comprising: receiving, during a monitoring occasion, a first control information over a first serving cell and a second control information over a second serving cell, wherein the first control information schedules a first transmission for a third serving cell and indicates a first assignment indicator value associated with the first transmission and the second control information schedules a second transmission for the third serving cell and indicates a second assignment indicator value associated with the first transmission; identifying a first start time for the first transmission and a second start time for the second transmission; and determining an order between the first assignment indicator value for the first transmission and the second assignment indicator value for the second transmission based at least in part on the first start time for the first transmission and the second start time for the second transmission, wherein the first assignment indicator value and the second assignment indicator value are associated with a hybrid automatic repeat request acknowledgement feedback. 
     Aspect 19: The method of aspect 18, wherein the first serving cell is different than the second serving cell. 
     Aspect 20: The method of any of aspects 18 through 19, wherein the first transmission is scheduled in the third serving cell using the first control information communicated over the first serving cell and the second control information communicated over the second serving cell that is different than the first serving cell. 
     Aspect 21: The method of any of aspects 18 through 20, further comprising: receiving, during a second monitoring occasion after the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for the third serving cell; and determining the order between a third assignment indicator value for the third transmission, the first assignment indicator value, and the second assignment indicator value based at least in part on the second monitoring occasion occurring after the monitoring occasion. 
     Aspect 22: The method of aspect 21, wherein a lower value of the first assignment indicator value and the third assignment indicator value corresponds to the monitoring occasion occurring before the second monitoring occasion. 
     Aspect 23: The method of any of aspects 18 through 22, further comprising: receiving, during the monitoring occasion, a third control information over the first serving cell that schedules a third transmission for a fourth serving cell; identifying a third index of the third serving cell scheduled by the first control information and the second control information and a fourth index of the fourth serving cell scheduled by the third control information; and determining the order between a third assignment indicator value to the third transmission, the first assignment indicator value, and the second assignment indicator value based at least in part on the third index and the fourth index. 
     Aspect 24: The method of aspect 23, wherein a lower value of the first assignment indicator value and the third assignment indicator value corresponds to a lower index value of the third index associated with the third serving cell and the fourth index associated with the fourth serving cell. 
     Aspect 25: The method of any of aspects 18 through 24, further comprising: transmitting feedback information for the first transmission and the second transmission based at least in part on determining the order between the first assignment indicator value and the second assignment indicator value, wherein the feedback information comprises a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     Aspect 26: The method of aspect 25, wherein the feedback information comprises a hybrid automatic repeat request acknowledgement or a hybrid automatic repeat request negative acknowledgement for the first transmission and the second transmission. 
     Aspect 27: The method of any of aspects 25 through 26, wherein the feedback information is communicated over a physical uplink control channel. 
     Aspect 28: The method of any of aspects 18 through 27, wherein the first serving cell comprises a primary cell; and the second serving cell comprises a secondary cell. 
     Aspect 29: The method of any of aspects 18 through 28, wherein the first assignment indicator value comprises a value of a downlink assignment indicator (DAI). 
     Aspect 30: The method of any of aspects 18 through 29, wherein a lower value of the first assignment indicator value and the second assignment indicator value corresponds to an earlier start time of the first start time and the second start time. 
     Aspect 31: The method of any of aspects 18 through 30, wherein the first transmission or the second transmission is communicated over a physical downlink shared channel or comprises a release of semi-persistent scheduling resources. 
     Aspect 32: The method of any of aspects 18 through 31, wherein the third serving cell scheduled by the first control information and the second control information comprises the first serving cell. 
     Aspect 33: The method of any of aspects 18 through 32, wherein the third serving cell scheduled by the first control information and the second control information is different than the first serving cell and the second serving cell. 
     Aspect 34: An apparatus for wireless communication at a UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 17. 
     Aspect 35: An apparatus for wireless communication at a UE, comprising at least one means for performing a method of any of aspects 1 through 17. 
     Aspect 36: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 17. 
     Aspect 37: An apparatus for wireless communication at a UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 18 through 33. 
     Aspect 38: An apparatus for wireless communication at a UE, comprising at least one means for performing a method of any of aspects 18 through 33. 
     Aspect 39: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 18 through 33. 
     It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined. 
     Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein. 
     Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof. 
     The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration). 
     The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. 
     Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media. 
     As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.” 
     In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label. 
     The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples. 
     The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.