Patent Description:
However, as the demand for mobile broadband access continues to increase, further improvements in LTE and NR technologies remain useful.

<CIT> discloses a method for detecting a PDCCH, performed by a WTRU, the method comprising: receiving a CORESET configuration for an eMBB CORESET, the CORESET configuration including a PDCCH preemption indicator that indicates whether PDCCH preemption is enabled; and on a condition that PDCCH preemption is enabled: identifying preempted REGs in the eMBB CORESET by comparing channel estimates for each REG bundle in the eMBB CORESET; removing the preempted REGs from the eMBB CORESET and performing channel estimation based on remaining REGs in the eMBB CORESET; and detecting the PDCCH by performing blind decoding, based on a received signal, on the remaining REGs in the eMBB CORESET.

<CIT> discloses a method of receiving a PDSCH by a UE in a wireless communication system, the method comprising: receiving a PDCCH through CORESET #<NUM>; receiving a PDSCH scheduled based on the PDCCH and a DMRS for the PDSCH; receiving information about at least one DRX timer for configuring a DRX operation; and receiving DCI during an On-duration based on the at least one DRX timer, wherein when the PDCCH is addressed to a SI-RNTI, a reference point for the DMRS is subcarrier #<NUM> of a lowest-numbered RB among RBs included in the CORESET #<NUM>.

In some aspects, a method of wireless communication, performed by a UE, may include receiving a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel are to be preempted, wherein the one or more shared channel communications are to be time-domain reference signal (RS) bundled based at least in part on an RS associated with the shared channel; and selectively performing time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication.

In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to receive a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel are to be preempted, wherein the one or more shared channel communications are to be time-domain RS bundled based at least in part on an RS associated with the shared channel; and selectively perform time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to receive a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel are to be preempted, wherein the one or more shared channel communications are to be time-domain RS bundled based at least in part on an RS associated with the shared channel; and selectively perform time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication.

In some aspects, an apparatus for wireless communication may include means for receiving a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel are to be preempted, wherein the one or more shared channel communications are to be time-domain RS bundled based at least in part on an RS associated with the shared channel; and means for selectively performing time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication.

Some UEs may be considered as machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. Some UEs may be considered as Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered as a Customer Premises Equipment (CPE).

Controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform one or more techniques associated with relation of shared channel reference signal bundling to a preemption indication, as described in more detail elsewhere herein. For example, controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform or direct operations of, for example, process <NUM> of <FIG> and/or other processes as described herein. Memories <NUM> and <NUM> may store data and program codes for base station <NUM> and UE <NUM>, respectively. As such, memory <NUM> of the UE can comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication, where the one or more instructions comprise one or more instructions that, when executed by one or more processors (e.g., processor <NUM> and/or controller/processor <NUM>) of the UE <NUM>, cause the one or more processors to perform the method described in greater detail with reference to <FIG> and <FIG>.

In some aspects, memory <NUM> and/or memory <NUM> may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station <NUM> and/or the UE <NUM>, may perform or direct operations of, for example, process <NUM> of <FIG> and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, interpreting the instructions, and/or the like.

In some aspects, UE <NUM> may include means for receiving (e.g., antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel (e.g., one or more PDSCH communications of a PDSCH) are to be preempted, wherein the one or more shared channel communications are to be time-domain RS bundled (e.g., time-domain DMRS bundled) based at least in part on an RS associated with the shared channel (e.g., a DMRS associated with the PDSCH); means for selectively performing (e.g., DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication; and/or the like. In some aspects, such means may include one or more components of UE <NUM> described in connection with <FIG>, such as controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, and/or the like.

<FIG> is a diagram <NUM> showing an example of a DL-centric slot or wireless communication structure that may be used in aspects of the present disclosure. The DL-centric slot may include a control portion <NUM>. The control portion <NUM> may exist in the initial or beginning portion of the DL-centric slot. The control portion <NUM> may include various scheduling information and/or control information corresponding to various portions of the DL-centric slot. In some aspects, the control portion <NUM> may include legacy PDCCH information, shortened PDCCH (sPDCCH) information), a control format indicator (CFI) value (e.g., carried on a physical control format indicator channel (PCFICH)), one or more grants (e.g., downlink grants, uplink grants, and/or the like), and/or the like.

The DL-centric slot may also include a DL data portion <NUM>. The DL data portion <NUM> may sometimes be referred to as the payload of the DL-centric slot. The DL data portion <NUM> may include the communication resources utilized to communicate DL data from the scheduling entity (e.g., UE or BS) to the subordinate entity or scheduled (e.g., UE).

The DL-centric slot may also include an UL short burst portion <NUM>. The UL short burst portion <NUM> may sometimes be referred to as an UL burst, an UL burst portion, a common UL burst, a short burst, an UL short burst, a common UL short burst, a common UL short burst portion, and/or various other suitable terms. In some aspects, the UL short burst portion <NUM> may include one or more reference signals. Additionally, or alternatively, the UL short burst portion <NUM> may include feedback information corresponding to various other portions of the DL-centric slot. For example, the UL short burst portion <NUM> may include feedback information corresponding to the control portion <NUM> and/or the data portion <NUM>. Non-limiting examples of information that may be included in the UL short burst portion <NUM> include an ACK signal (e.g., a PUCCH ACK, a PUSCH ACK, an immediate ACK), a NACK signal (e.g., a PUCCH NACK, a PUSCH NACK, an immediate NACK), a scheduling request (SR), a buffer status report (BSR), a HARQ indicator, a channel state indication (CSI), a channel quality indicator (CQI), a sounding reference signal (SRS), a demodulation reference signal (DMRS), PUSCH data, and/or various other suitable types of information. The UL short burst portion <NUM> may include additional or alternative information, such as information pertaining to random access channel (RACH) procedures, scheduling requests, and various other suitable types of information.

The foregoing is one example of a DL-centric wireless communication structure, and alternative structures having similar features may exist without necessarily deviating from the aspects described herein.

<FIG> is a diagram <NUM> showing an example of an UL-centric slot or wireless communication structure that may be used in aspects of the present disclosure. The UL-centric slot may include a control portion <NUM>. The control portion <NUM> may exist in the initial or beginning portion of the UL-centric slot. The control portion <NUM> in <FIG> may be similar to the control portion <NUM> described above with reference to <FIG>. The UL-centric slot may also include an UL long burst portion <NUM>. The UL long burst portion <NUM> may sometimes be referred to as the payload of the UL-centric slot. The UL long burst portion <NUM> may refer to the communication resources utilized to communicate UL data from the subordinate or scheduled entity (e.g., UE) to the scheduling entity (e.g., UE or BS). In some configurations, the control portion <NUM> may be a physical DL control channel (PDCCH).

The UL-centric slot may also include an UL short burst portion <NUM>. The UL short burst portion <NUM> in <FIG> may be similar to the UL short burst portion <NUM> described above with reference to <FIG>, and may include any of the information described above in connection with <FIG>. The foregoing is one example of an UL-centric wireless communication structure, and alternative structures having similar features may exist without necessarily deviating from the aspects described herein.

In one example, a wireless communication structure, such as a frame, may include both UL-centric slots and DL-centric slots. In this example, the ratio of UL-centric slots to DL-centric slots in a frame may be dynamically adjusted based at least in part on the amount of UL data and the amount of DL data that are transmitted. For example, if there is more UL data, then the ratio of UL-centric slots to DL-centric slots may be increased. Conversely, if there is more DL data, then the ratio of UL-centric slots to DL-centric slots may be decreased.

In an NR system, reference signal (RS) bundling in the time domain (which may also be referred to as time-domain reference signal bundling) enables reference signals across multiple slots to be used/bundled in association with receiving a data channel carried in a given one of the multiple slots, in other words, enables the multiple slots to be time-domain reference signal bundled. As a particular example, performing time-domain DMRS bundling for a group of PDSCH communications allows DMRSs across the group of PDSCH communications to be bundled in association with receiving a given one of the PDSCH communications. Reference signal bundling in the time domain can, for example, provide coverage enhancement, enable high mobility, and provide low DMRS overhead with peak throughput.

So-called "look-ahead" DMRS bundling allows a UE to be signaled a set of upcoming slots for which the UE may assume that data channels are bundled. For example, downlink control information (DCI) in a first slot may carry an indication that a next two upcoming slots are to be time-domain DMRS bundled. Conversely, so-called "look-back" DMRS bundling allows a UE to be signaled a set of previous slots (e.g., a set of slots already received at the UE) for which the UE may assume that the data channels are bundled. For example, a toggling bit in DCI may carry a new bundling indicator (NBI). Here, in a first slot, the NBI may have a first value (e.g., <NUM>). Similarly, in a second slot, the NBI may also have the first value, meaning that the second slot is to be bundled with the previous (first) slot. However, in a third slot, the NBI may have a second value (e.g., <NUM>). Here, the NBI having a different value indicates that the third slot is not to be bundled with the previous (first and second) slots. In this example, upon receiving the third slot, the UE may perform time-domain DMRS bundling for the first and second (i.e., previously received) slots. The NBI may be similarly used in subsequent slots to further indicate different bundles. In some cases of look-back bundling, a UE may be configured to bundle DMRS across PDSCH communications with continuous (e.g., increasing without gap) downlink counter downlink assignment indices (DAI), in addition to conditioning bundling on the NBI in the manner described above.

There are a number of UE complexity considerations related to DCI-based DMRS bundling. For example, in some cases, the UE may be expected to perform time-domain bundling only if the same port identifiers are used in a previous PDSCH and a new PDSCH for which time-domain DMRS bundling is to be performed. If different port identifiers are used, this may serve as an indication that bundling is not needed (e.g., since the PDSCHs would be different channels). As another example, the UE may be expected to perform time-domain bundling only if a previous PDSCH and a new PDSCH are of the same type (e.g., Type A, Type B, or the like). Here, different types of PDSCH may have different DMRS patterns, which would increase complexity at the UE when performing bundling. As another example, the UE may be expected to perform time-domain bundling only if a previous PDSCH and a new PDSCH have the same DMRS pattern with respect to the actual location of DMRS symbols within the PDSCH (e.g., to keep complexity at the UE relatively low). As another example, the UE may be expected to perform time-domain bundling only if the same DMRS type (e.g., Type <NUM>, Type <NUM>, or the like) is used between a previous and a new PDSCH. In general, if the applicable assumptions are not met, then the UE may not be expected to time-domain bundle DMRS across PDSCH communications.

Further, in an NR system, preemption enables a first type of communication to be punctured or interrupted to allow a (e.g., higher priority) second type of communication to be communicated. For example, preemption allows an enhanced mobile broadband (eMBB) communication to be punctured or interrupted to allow an ultra-reliable low-latency communication (URLLC) communication to be communicated. However, such preemption may cause a loss of phase coherence between the transmit durations associated with the first communication because the transmit durations have been made non-contiguous by the second communication. For example, on the uplink, a URLLC communication may have a different transmit power than an eMBB communication, which may cause loss of phase coherence. As another example, a URLLC communication may be scheduled in a different component carrier or bandwidth part such that the UE has to tune-away a radio frequency (RF) to communicate (e.g., receive or transmit) the URLLC communication and then tune back for the eMBB communication, which can cause loss of phase coherence.

An indication-based multiplexing approach to preemption may be beneficial for both URLLC and eMBB UEs at a cost of indicator overhead. In some cases, an indication of a preemption (herein referred to as a preemption indication) may be a current indication with respect to the preempting communication. For example, for a URLLC communication that is preempting an eMBB communication, the preemption indication (PI) may be provided in DCI that is current with (i.e., at the same time as) the URLLC communication. Alternatively, in some cases, the preemption indication may be a post-indication with respect to the preempting communication and the preempted communication. For example, for a URLLC communication that is preempting an eMBB communication, the preemption indication may be provided in DCI after (e.g., in a next slot) both the URLLC communication and the eMBB communication. Alternatively, in some cases, the preemption indication may be a post-indication with respect to the preempting communication and current with the preempted communication. For example, for a URLLC communication that is preempting an eMBB communication, the preemption indication may be provided after the URLLC communication, but within the same slot of the eMBB communication (e.g., in one or more symbols of the eMBB slot).

In some cases, when implementing preemption, a particular DCI format (e.g., DCI format 2_1) is used for notifying the UE of resources (e.g., one or more physical resource blocks and/or one or more symbols) where the UE may assume no transmission is intended for the UE. As an example of preemption, a base station may schedule a first UE to receive an eMBB communication during a slot. In the middle of the slot, a URLLC packet for a second UE may arrive at the base station, and the base station may schedule and transmit the packet to the second UE in a subset of resources of the slot. Here, the base station would indicate, to the first UE via a downlink preemption indication (e.g., in the next slot), the subset of resources of the slot that are punctured (i.e., used for the transmission of the URLLC packet to the second UE). The first UE can use this information to enhance decoding of the eMBB communication. In some cases, DCI format 2_1 can be used to transmit a set of preemption indications (e.g., preemption indication <NUM> through preemption indication N), where each preemption indication is <NUM> bits. For each UE, a different preemption indication can correspond to a different set of component carriers (e.g., serving cells).

In a wireless communication system that allows both time-domain DMRS bundling and preemption, such as an NR system, a UE may be signaled that a group of PDSCH communications are to be time-domain DMRS bundled, and may also receive a downlink preemption indication indicating that resources of at least one PDSCH communication of the one or more of the time-domain DMRS-bundled PDSCH communications are to be preempted (e.g., fully or partially). In other words, the UE may receive a downlink preemption indication that could conflict with a performance of time-domain DMRS bundling. Therefore, the UE should be configured to handle the time-domain DMRS bundling in light of the preemption indication. Notably, such an issue is not present in a wireless communication system in which downlink preemption was not allowed, such as an LTE system.

Some aspects described herein provide techniques and apparatuses for handling of time-domain RS bundling of a group of shared channel communications in light of a preemption indication indicating that resources of at least one shared channel communication among the group of shared channel communications are to be at least partially preempted. In some aspects, the UE may receive a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications that are to be time-domain RS bundled are to be preempted, and may selectively perform time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication. Additional details are provided below.

<FIG> are diagrams illustrating examples associated with relation of shared channel reference signal bundling to a preemption indication, in accordance with various aspects of the present disclosure. Notably, the techniques and apparatuses described in association with <FIG> are described in the context of relation of PDSCH DMRS bundling to a downlink preemption indication. However, these techniques can be applied to other types of shared channels (e.g., uplink shared channels, sidelink shared channels, or the like) and/or other types of reference signals (e.g., a reference signal used on for an uplink shared channel, a reference signal used for a sidelink shared channel, or the like).

As shown by reference <NUM> in <FIG>, a base station (e.g., a base station <NUM>) may provide, to a UE (e.g., a UE <NUM>), an indication that one or more PDSCH communications are to be time-domain DMRS bundled. In some aspects, the indication may be provided to the UE via radio resource control (RRC) signaling, a medium access control control element (MAC-CE), DCI, or the like.

As shown by reference <NUM>, the base station may also provide, to the UE, a preemption indication indicating that resources of at least one PDSCH among the one or more PDSCH communications are to be preempted. For example, the base station may provide, and the UE may receive, a preemption indication that identifies a set of preempted resources. The UE may determine, based at least in part on the information that identifies the set of preempted resources and the indication that the one or more PDSCH communications are to be time-domain DMRS bundled, that the preemption indication indicates that resources of the at least one PDSCH communication among the one or more DMRS bundled PDSCH communications are to be preempted. As shown by reference <NUM>, the base station may transmit the one or more PDSCH communications that are to be time-domain DMRS bundled.

As shown by reference <NUM>, the UE may selectively perform time-domain DMRS bundling of the one or more PDSCH communications based at least in part on the preemption indication. In some aspects, selectively performing time-domain DMRS bundling may include performing time-domain DMRS bundling for all of the PDSCH communications, performing time-domain DMRS bundling for one or more subsets of the one or more PDSCH communications, or refraining from performing time-domain DMRS bundling for the one or more PDSCH communications, as described in further detail below. In some aspects, the UE may adjust time-domain DMRS bundling for the one or more PDSCH communications indicated by the base station in indication <NUM> based at least in part on the preemption indication <NUM>. The adjustment may include omitting one or more of the indicated PDSCH communications from the time-domain DMRS bundling as described in more detail below.

In some aspects, the UE may selectively perform the time-domain DMRS bundling based at least in part on a type of preemption associated with the preemption indication. The type of preemption may be indicative of, for example, whether one or more DMRS resources are indicated as preempted. That is, the type of preemption may depend on whether the preemption indication indicates preemption of data symbols only (i.e., no preemption of DMRS resources). In some aspects, the UE may determine whether the resources indicated by the preemption indication include one or more DMRS resources in association with determining the type of preemption. Here, if the UE determines that the preemption indication indicates preemption of only data symbols, then the UE may, in some aspects, perform time-domain DMRS bundling across all of the PDSCH communications (e.g., including any preempted PDSCH communications, since all DMRSs are still intact). Conversely, if the UE determines that the preemption indication indicates preemption of one or more DMRS resources, then the UE may, in some aspects, perform time-domain DMRS bundling in a manner that accounts for the preemption of the one or more DMRS resources, examples of which are described in further detail below. In some aspects, the behavior of the UE when performing time-domain DMRS bundling in the case of preemption of one or more DMRS resources may be based at least in part on a UE capability.

As another example, the type of preemption may be indicative of whether a PDSCH is to be fully preempted. That is, the type of preemption may depend on whether the preemption indication indicates full preemption of a PDSCH communication (i.e., such that the PDSCH includes empty symbols). In some aspects, the UE may determine whether the resources indicated by the preemption indication indicate that the PDSCH communication is to be fully preempted in association with determining the type of preemption. Here, if the UE determines that the preemption indication indicates full preemption of a PDSCH communication, then the UE may, in some aspects, determine whether a gap, associated with the PDSCH communication that is to be fully preempted, satisfies a threshold. Here, if the gap does not satisfy (e.g., is smaller than or equal to) the threshold, then the UE may perform time-domain DMRS bundling in a manner that disregards the gap. Conversely, if the gap satisfies (e.g., is larger than) the threshold, then the UE may perform time-domain DMRS bundling in a manner that accounts for the gap (e.g., since the gap may result in a loss of phase coherency), examples of which are described in further detail below. In some aspects, the behavior of the UE when performing time-domain DMRS bundling in the case of a full PDSCH preemption may be based at least in part on a UE capability.

In some aspects, the UE may selectively perform the time-domain DMRS bundling based at least in part on timing of the preemption indication. For example, the UE may selectively perform time-domain DMRS bundling based at least in part on a determination that the preemption indication is a post-indication associated with the preemption. In some aspects, the UE may determine that the preemption indication is a post-indication based at least in part on the preemption indication being received after an end of a last PDSCH communication of the one or more PDSCH communications indicated to be time-domain DMRS bundled. In some aspects, the UE may determine that the preemption indication is a post-indication based at least in part on the preemption indication being received at least a threshold amount of time after an end of a last PDSCH communication of the one or more PDSCH communications indicated to be time-domain DMRS bundled. In some aspects, the threshold amount of time may be based at least in part on a UE capability. In some aspects, the UE may determine that the preemption indication is a post-indication based at least in part on the preemption indication being received at a time that would cause the UE to change a DMRS bundling behavior (e.g., a time at which the UE is unable to update DMRS-bundled channel estimation processing that has already started). In some aspects, in the case of a post-indication, the UE may not change the time-domain DMRS bundling behavior. In some aspects, the determination that the preemption indication is a post-indication may be based at least in part on a UE capability. For example, a UE capability of a first UE may cause the first UE to determine whether a preemption indication is a post-indication based at least in part on whether the preemption indication is received after an end of a last PDSCH communication of the one or more PDSCH communications indicated to be time-domain DMRS bundled. As another example, a UE capability of a second UE may cause the second UE to determine whether a preemption indication is a post-indication based at least in part on whether the preemption indication is received at a time that would cause the second UE to change a DMRS bundling behavior.

As another example, the UE may selectively perform the time-domain DMRS bundling based at least in part on a determination that the preemption indication is a pre-indication associated with the preemption, e.g. before the one or more preempted PDSCH communications. Similarly, as another example, the UE may selectively perform the time-domain DMRS bundling based at least in part on a determination that the preemption indication is a current-indication associated with the preemption. In some aspects, in the case of a pre-indication or a current-indication, the UE may be expected to continue the time-domain DMRS bundling (e.g., if DMRS of the preempted PDSCH communication is not affected).

In some aspects, the UE may selectively perform the time-domain DMRS bundling based at least in part on a UE capability (e.g., a capability of the UE that dictates or controls performing time-domain DMRS bundling).

In some aspects, the UE may selectively perform the time-domain DMRS bundling based at least in part on a configured DMRS bundling parameter (e.g., a DMRS bundling parameter configured on the UE by the base station).

In general, the UE may selectively perform the time-domain DMRS bundling based at least in part on a type of preemption, a timing of the preemption, a UE capability, a configured DMRS bundling parameter, and/or one or more other factors.

In some aspects, selectively performing the time-domain DMRS bundling includes performing time-domain DMRS bundling for all of the one or more PDSCH communications. For example, when the type of preemption is data-only (e.g., when the preemption indication indicates preemption of data symbols only), the UE may perform time-domain DMRS bundling for all of the one or more PDSCH communications. In some aspects, the UE may perform time-domain DMRS bundling for all of the one or more PDSCH communications even if one or more of the PDSCH communication have been preempted.

In some aspects, selectively performing the time-domain DMRS bundling includes performing time-domain DMRS bundling for at least one subset of PDSCH communications included in the one or more PDSCH communications.

For example, the UE may perform time-domain DMRS bundling for a subset of the one or more PDSCH communications. In this example, the subset of the one or more PDSCH communications may include PDSCH communications before the preempted resources. <FIG> and <FIG> are diagrams illustrating examples of such time-domain DMRS bundling. In <FIG> and <FIG>, a preemption indication indicates that DMRS resources of a particular PDSCH communication (PDSCH3) are preempted. In the example shown in <FIG>, based at least in part on the preemption indication, the UE performs time-domain DMRS bundling for PDSCH1 and PDSCH2 (e.g., the UE bundles only the first two PDSCH communications). In the example, shown in <FIG>, based at least in part on the preemption indication, the UE performs time-domain DMRS bundling for PDSCH1 and PDSCH2 with an unaffected DMRS of PDSCH3 (e.g., the UE bundles only the first two PDSCH communications with the DMRS of the third PDSCH communication that is not affected by the preemption).

As another example, the UE may perform time-domain DMRS bundling for a first subset of the one or more PDSCH communications and may perform time-domain DMRS bundling for a second subset of the one or more PDSCH communications. In this example, the first subset of the one or more PDSCH communications may include PDSCH communications before the preempted resources and the second subset of the one or more PDSCH communications may include PDSCH communications after the preempted resources. <FIG> are diagrams illustrating examples of such time-domain DMRS bundling. In <FIG>, a preemption indication indicates that DMRS resources of a particular PDSCH communication (PDSCH3) are preempted. In the example shown in <FIG>, based at least in part on the preemption indication, the UE performs time-domain DMRS bundling for a subset of PDSCH communications including PDSCH1 and PDSCH2, and performs time-domain DMRS bundling for a subset of PDSCH communications including PDSCH4 and PDSCH5. In the example, shown in <FIG>, based at least in part on the preemption indication, the UE performs time-domain DMRS bundling for a subset of PDSCH communications including PDSCH1 and PDSCH2 with an unaffected DMRS of PDSCH3, and performs time-domain DMRS bundling for a subset of PDSCH communications including PDSCH4 and PDSCH5. In the example, shown in <FIG>, based at least in part on the preemption indication, the UE performs time-domain DMRS bundling for a subset of PDSCH communications including PDSCH1 and PDSCH2 with a first unaffected DMRS of PDSCH3, and performs time-domain DMRS bundling for a subset of PDSCH communications including PDSCH4 and PDSCH5 with a second unaffected DMRS of PDSCH3.

As another example, the UE may perform time-domain DMRS bundling for a first subset of the one or more PDSCH communications and may perform per-PDSCH DMRS processing, i.e. without time-domain DMRS bundling, for at least one other PDSCH communication of the one or more PDSCH communications. Here, the first subset of the one or more PDSCH communications may include PDSCH communications before the preempted resources, and the at least one other PDSCH communication may include PDSCH communications after the preempted resources.

In some aspects, selectively performing the time-domain DMRS bundling includes refraining from performing time-domain DMRS bundling for any of the one or more PDSCH communications. That is, in some aspects, the UE may not perform time-domain DMRS bundling for any of the one or more PDSCH communication based at least in part on the preemption indication.

<FIG> is a diagram illustrating an example process <NUM> performed, for example, by UE, in accordance with various aspects of the present disclosure. Example process <NUM> is an example where the UE (e.g., UE <NUM> and/or the like) performs operations associated with relation of shared channel reference signal bundling to a preemption indication.

As shown in <FIG>, in some aspects, process <NUM> may include receiving a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel are to be preempted, wherein the one or more shared channel communications are to be time-domain RS bundled based at least in part on an RS associated with the shared channel (block <NUM>). For example, the UE (e.g., antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) may receive a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel are to be preempted, as described above, for example, with reference to <FIG>. In some aspects, the one or more shared channel communications are to be time-domain RS bundled based at least in part on an RS associated with the shared channel.

As further shown in <FIG>, in some aspects, process <NUM> may include selectively performing time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication (block <NUM>). For example, the UE (e.g., DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) may selectively perform time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication, as described above, for example, with reference to <FIG>. In some aspects, the UE may adjust time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication. The adjustment may include omitting one or more of the shared channel communications from the time-domain RS bundling as described above.

Claim 1:
A method of wireless communication performed by a user equipment, UE, the method comprising:
receiving (<NUM>) a preemption indication indicating that resources of at least one shared channel communication among one or more shared channel communications of a shared channel are to be preempted,
wherein the one or more shared channel communications are to be time-domain reference signal, RS, bundled based at least in part on an RS associated with the shared channel; and
selectively performing (<NUM>) time-domain RS bundling of the one or more shared channel communications based at least in part on the preemption indication.