Patent Description:
R1-<NUM> ("Grant-free transmission for UL URLLC") relates to grant-free (GF) resource configuration, HARQ and the behaviour of grant-free repetitions. Further, the requirements to facilitate stopping of the GF repetitions of TBs by switching to grant-based (GB) retransmissions, i.e., GF2GB switching are discussed. Moreover, the URLLC system capacity of the GF2GB switching schemes are compared with that of the GF scheme stopping repetitions on receiving ACK. Finally, the system simulation results are provided for performance evaluation on different schemes.

<CIT> discloses a wireless communication method performed by a UE which includes transmitting transport block repetitions to an eNB, wherein one HARQ process includes multiple repetition sets of a transport block if one repetition set of the transport block is not enough for the eNB to successfully decode the transport block, each of the multiple repetition sets includes multiple repetitions of the transport block, each of the multiple repetition sets is followed by a feedback channel to indicate whether the transport block is successfully decoded by the eNB.

<CIT> relates to transmission and reception of data in a wireless communication system. In particular, the predetermined number of repetitions of the same data portion is transmitted over the wireless interface. The receiving device receives the repetitions, attempts their decoding and checks whether the decoding was successful. If the decoding was successful after the predetermined number of repetitions or less, a positive acknowledgement is generated. In addition, a feedback including a bundle size information is generated and transmitted. The bundle size information includes a number of repetitions, smaller or equal to the predetermined number, after which the decoding was successful. The feedback is transmitted to the data transmitting device which may adapt the predetermined number of repetitions accordingly. The invention enables efficient control of the number of repetitions applied which is particularly advantageous for coverage enhancement purposes.

<CIT> discloses methods for wireless communication including receiving a data grant for multiple retransmission time slots associated with successfully decoded high speed data, where the grant is in response to a base station detecting a NACK. Moreover, the method comprises tuning away from a serving cell during the retransmission time slots to perform inter-RAT measurements, inter-frequency measurement and/or activity for a second subscriber identity module (SIM) of the UE. D2 (<CIT>: "Power Control for Systems Based on Uplink Link Identifier") discusses techniques for transmit power control calculation by UEs.

<CIT> relates to an apparatus employable by a UE which comprises a processor configured to: configure, for each active link of a set of active links, a distinct set of power control parameters, wherein each active link comprises a distinct combination of a UE beam of a set of UE beams and a trans-mission/reception point (TRP) beam of a set of TRP beams; process an uplink (UL) grant received via a control channel that indicates a first active link of the set of active links, wherein the first active link com-prises a first UE beam and a first TRP beam; calculate a first transmit power based at least in part on the distinct set of power control parameters configured for the first active link; and output UL data for trans-mission via the first UE beam at the first transmit power.

<CIT> discloses a network that includes a transmitter and a receiver, wherein the transmitter includes a set of transmit antennas and the receiver includes a set of receive antennas. The transmitter duplicates a packet as copies of the packet, and selects subsets of the set of transmit antennas independent of channel characteristics between the subsets of transmit antennas and the set of receive antennas, wherein combinations of the antennas in the subsets of the transmit antennas are different. The receiver selects subsets of the set of receive antennas independent of channel characteristics between the subsets of receive antennas and the set of transmit antennas, wherein combinations of the antennas in the subsets of the receive antennas are different. The selected subsets are used to transmit the packet, and retransmit the packet in case of a failure in a previous transmission.

<CIT> discloses a method of retransmitting packet data in a wireless communication system which comprises receiving a link map information element from a transmitting station having three antennas to achieve space time transmit diversity, wherein first, second and third packet data are transmitted from first, second and third antenna of the transmitting station, respectively. The method also comprises transmitting a non-acknowledgement signal to the transmitting station if at least one packet data from the transmitting station is not properly decoded. The method also comprises receiving the packet data from the transmitting station, wherein at least two of retransmitted packet data are transmitted from different antennas of the transmitting station, and one of retransmitted packet data is transmitted from the same antenna of the transmitting station. The retransmitted packet data are received with an information element comprising a retransmission count associated with a number of retransmission made by the transmitting station.

In some aspects, a method for wireless communication performed by a user equipment may include receiving a grant for a transmission having a first number of repetitions, wherein the user equipment is configured to selectively provide an acknowledgment for the transmission after a second number of repetitions that is less than the first number of repetitions, attempting to decode the transmission after the second number of repetitions, and selectively providing the acknowledgment after the second number of transmissions based at least in part on a result of attempting to decode the transmission, wherein providing the acknowledgment is to cause one or more remaining repetitions of the transmission not to be performed.

In some aspects, a user equipment for wireless communication may include 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 grant for a transmission having a first number of repetitions, wherein the user equipment is configured to selectively provide an acknowledgment for the transmission after a second number of repetitions that is less than the first number of repetitions, attempt to decode the transmission after the second number of repetitions, and selectively provide the acknowledgment after the second number of transmissions based at least in part on a result of attempting to decode the transmission, wherein providing the acknowledgment is to cause one or more remaining repetitions of the transmission not to be performed.

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 user equipment, may cause the one or more processors to receive a grant for a transmission having a first number of repetitions, wherein the user equipment is configured to selectively provide an acknowledgment for the transmission after a second number of repetitions that is less than the first number of repetitions, attempt to decode the transmission after the second number of repetitions, and selectively provide the acknowledgment after the second number of transmissions based at least in part on a result of attempting to decode the transmission, wherein providing the acknowledgment is to cause one or more remaining repetitions of the transmission not to be performed.

In some aspects, an apparatus for wireless communication may include means for receiving a grant for a transmission having a first number of repetitions, wherein the apparatus is configured to selectively provide an acknowledgment for the transmission after a second number of repetitions that is less than the first number of repetitions, means for attempting to decode the transmission after the second number of repetitions, and means for selectively providing the acknowledgment after the second number of transmissions based at least in part on a result of attempting to decode the transmission, wherein providing the acknowledgment is to cause one or more remaining repetitions of the transmission not to be performed.

In some aspects, a method for wireless communication may include receiving a grant for an uplink transmission associated with a number of repetitions, determining whether an indication that the uplink transmission is to be terminated before the number of repetitions is received, and selectively terminating the uplink transmission before the number of repetitions based at least in part on whether the indication is received.

In some aspects, a user equipment for wireless communication may include 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 grant for an uplink transmission associated with a number of repetitions, determine whether an indication that the uplink transmission is to be terminated before the number of repetitions is received, and selectively terminate the uplink transmission before the number of repetitions based at least in part on whether the indication is received.

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 user equipment, may cause the one or more processors to receive a grant for an uplink transmission associated with a number of repetitions, determine whether an indication that the uplink transmission is to be terminated before the number of repetitions is received, and selectively terminate the uplink transmission before the number of repetitions based at least in part on whether the indication is received.

In some aspects, an apparatus for wireless communication may include means for receiving a grant for an uplink transmission associated with a number of repetitions, means for determining whether an indication that the uplink transmission is to be terminated before the number of repetitions is received, and means for selectively terminating the uplink transmission before the number of repetitions based at least in part on whether the indication is received.

In some aspects, a method for wireless communication may include receiving a grant for a communication of multiple repetitions, wherein the multiple repetitions are to be transmitted using multiple, different transmit beams, and identifying the multiple, different transmit beams based at least in part on at least one of the grant, the multiple repetitions, information identifying the multiple, different transmit beams, or a rule for identifying the multiple, different transmit beams.

In some aspects, a user equipment for wireless communication may include 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 grant for a communication of multiple repetitions, wherein the multiple repetitions are to be transmitted using multiple, different transmit beams, and identify the multiple, different transmit beams based at least in part on at least one of the grant, the multiple repetitions, information identifying the multiple, different transmit beams, or a rule for identifying the multiple, different transmit beams.

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 user equipment, may cause the one or more processors to receive a grant for a communication of multiple repetitions, wherein the multiple repetitions are to be transmitted using multiple, different transmit beams, and identify the multiple, different transmit beams based at least in part on at least one of the grant, the multiple repetitions, information identifying the multiple, different transmit beams, or a rule for identifying the multiple, different transmit beams.

In some aspects, an apparatus for wireless communication may include means for receiving a grant for a communication of multiple repetitions, wherein the multiple repetitions are to be transmitted using multiple, different transmit beams, and means for identifying the multiple, different transmit beams based at least in part on at least one of the grant, the multiple repetitions, information identifying the multiple, different transmit beams, or a rule for identifying the multiple, different transmit beams.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, wireless communication device, and processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.

<FIG> shows a block diagram of a design of BS <NUM> and UE <NUM>, which may be one of the base stations and one of the UEs in <FIG>. BS <NUM> may be equipped with T antennas 234a through 234t, and UE <NUM> may be equipped with R antennas 252a through 252r, where in general T ≥ <NUM> and R ≥ <NUM>.

At BS <NUM>, a transmit processor <NUM> may receive data from a data source <NUM> for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. According to certain aspects described in more detail below, the synchronization signals can be generated with location encoding to convey additional information.

At UE <NUM>, antennas 252a through 252r may receive the downlink signals from BS <NUM> and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.

The symbols from transmit processor <NUM> may be precoded by a TX MIMO processor <NUM> if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to BS <NUM>. At BS <NUM>, the uplink signals from UE <NUM> and other UEs may be received by antennas <NUM>, processed by demodulators <NUM>, detected by a MIMO detector <NUM> if applicable, and further processed by a receive processor <NUM> to obtain decoded data and control information sent by UE <NUM>. BS <NUM> may include communication unit <NUM> and communicate to network controller <NUM> via communication unit <NUM>.

Controllers/processors <NUM> and <NUM> and/or any other component(s) in <FIG> may direct the operation at BS <NUM> and UE <NUM>, respectively, to perform techniques for improving NR coverage. For example, controller/processor <NUM> and/or other processors and modules at UE <NUM>, may perform or direct operations of UE <NUM> to perform techniques for improving NR coverage. For example, controller/processor <NUM> and/or other controllers/processors and modules at UE <NUM> may perform or direct operations of, for example, process <NUM> of <FIG>, process <NUM> of <FIG>, process <NUM> of <FIG>, and/or other processes as described herein. In some aspects, one or more of the components shown in <FIG> may be employed to perform example process <NUM>, example process <NUM>, example process <NUM>, and/or other processes for the techniques described herein. Memories <NUM> and <NUM> may store data and program codes for BS <NUM> and UE <NUM>, respectively.

In some aspects, UE <NUM> may include means for receiving a grant for a transmission having a first number of repetitions, means for attempting to decode the transmission after a second number of repetitions, means for selectively providing an acknowledgment after the second number of transmissions based at least in part on a result of attempting to decode the transmission, means for receiving an indication that one or more remaining repetitions are not to be performed, means for receiving the one or more remaining repetitions, means for attempting to decode the one or more remaining repetitions, means for selectively providing another acknowledgment, after the second number of repetitions of the one or more remaining repetitions, based at least in part on a result of attempting to decode the one or more remaining repetitions, means for receiving a grant for an uplink transmission associated with a number of repetitions, means for determining whether an indication that the uplink transmission is to be terminated before the number of repetitions is received, means for selectively terminating the uplink transmission before the number of repetitions based at least in part on whether the indication is received, means for receiving a grant for a communication of multiple repetitions wherein the multiple repetitions are to be transmitted using multiple, different transmit beams, means for identifying the multiple, different transmit beams based at least in part on at least one of the grant, the multiple repetitions, information identifying the multiple, different transmit beams, or a rule for identifying the multiple, different transmit beams, and/or the like. In some aspects, such means may include one or more components of UE <NUM> described in connection with <FIG>.

<FIG> shows an example frame structure <NUM> for frequency division duplexing (FDD) in a telecommunications system (e.g., LTE). Each radio frame may have a predetermined duration (e.g., <NUM> milliseconds (ms)) and may be partitioned into <NUM> subframes with indices of <NUM> through <NUM>. Each subframe may include two slots. Each radio frame may thus include <NUM> slots with indices of <NUM> through <NUM>. Each slot may include L symbol periods, e.g., seven symbol periods for a normal cyclic prefix (as shown in <FIG>) or six symbol periods for an extended cyclic prefix. The <NUM> symbol periods in each subframe may be assigned indices of <NUM> through <NUM>-<NUM>.

In certain telecommunications (e.g., LTE), a BS may transmit a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) on the downlink in the center of the system bandwidth for each cell supported by the BS. The PSS and SSS may be transmitted in symbol periods <NUM> and <NUM>, respectively, in subframes <NUM> and <NUM> of each radio frame with the normal cyclic prefix, as shown in <FIG>. The BS may transmit a cell-specific reference signal (CRS) across the system bandwidth for each cell supported by the BS. The CRS may be transmitted in certain symbol periods of each subframe and may be used by the UEs to perform channel estimation, channel quality measurement, and/or other functions. The BS may also transmit a physical broadcast channel (PBCH) in symbol periods <NUM> to <NUM> in slot <NUM> of certain radio frames. The PBCH may carry some system information. The BS may transmit other system information such as system information blocks (SIBs) on a physical downlink shared channel (PDSCH) in certain subframes. The BS may transmit control information/data on a physical downlink control channel (PDCCH) in the first B symbol periods of a subframe, where B may be configurable for each subframe. The BS may transmit traffic data and/or other data on the PDSCH in the remaining symbol periods of each subframe.

In other systems (e.g., such NR or <NUM> systems), a Node B may transmit these or other signals in these locations or in different locations of the subframe.

<FIG> shows two example subframe formats <NUM> and <NUM> with the normal cyclic prefix. Each resource block may cover <NUM> subcarriers in one slot and may include a number of resource elements. Each resource element may cover one subcarrier in one symbol period and may be used to send one modulation symbol, which may be a real or complex value.

Subframe format <NUM> may be used for two antennas. A CRS may be transmitted from antennas <NUM> and <NUM> in symbol periods <NUM>, <NUM>, <NUM>, and <NUM>. A reference signal is a signal that is known a priori by a transmitter and a receiver and may also be referred to as a pilot signal. A CRS is a reference signal that is specific for a cell, e.g., generated based at least in part on a cell identity (ID). In <FIG>, for a given resource element with label Ra, a modulation symbol may be transmitted on that resource element from antenna a, and no modulation symbols may be transmitted on that resource element from other antennas. Subframe format <NUM> may be used with four antennas. A CRS may be transmitted from antennas <NUM> and <NUM> in symbol periods <NUM>, <NUM>, <NUM>, and <NUM> and from antennas <NUM> and <NUM> in symbol periods <NUM> and <NUM>. For both subframe formats <NUM> and <NUM>, a CRS may be transmitted on evenly spaced subcarriers, which may be determined based at least in part on cell ID. CRSs may be transmitted on the same or different subcarriers, depending on their cell IDs. For both subframe formats <NUM> and <NUM>, resource elements not used for the CRS may be used to transmit data (e.g., traffic data, control data, and/or other data).

The PSS, SSS, CRS and PBCH in LTE are described in <NPL>," which is publicly available.

An interlace structure may be used for each of the downlink and uplink for FDD in certain telecommunications systems (e.g., LTE). For example, Q interlaces with indices of <NUM> through Q - <NUM> may be defined, where Q may be equal to <NUM>, <NUM>, <NUM>, <NUM>, or some other value. Each interlace may include subframes that are spaced apart by Q frames. In particular, interlace q may include subframes q, q + Q, q + 2Q, and/or the like, where q ∈ {<NUM>,.

The wireless network may support hybrid automatic retransmission request (HARQ) for data transmission on the downlink and uplink. For HARQ, a transmitter (e.g., a BS) may send one or more transmissions of a packet until the packet is decoded correctly by a receiver (e.g., a UE) or some other termination condition is encountered. For synchronous HARQ, all transmissions of the packet may be sent in subframes of a single interlace. For asynchronous HARQ, each transmission of the packet may be sent in any subframe.

Received signal quality may be quantified by a signal-to-noise- and-interference ratio (SINR), or a reference signal received quality (RSRQ), or some other metric.

While aspects of the examples described herein may be associated with LTE technologies, aspects of the present disclosure may be applicable with other wireless communication systems, such as NR or <NUM> technologies.

In aspects, NR may utilize OFDM with a CP (herein referred to as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using time division duplexing (TDD).

A single component carrier bandwidth of <NUM> may be supported. NR resource blocks may span <NUM> sub-carriers with a sub-carrier bandwidth of <NUM> kilohertz (kHz) over a <NUM> duration. Each radio frame may include <NUM> subframes with a length of <NUM>. Consequently, each subframe may have a length of <NUM>. Each subframe may indicate a link direction (e.g., DL or UL) for data transmission and the link direction for each subframe may be dynamically switched. Each subframe may include downlink/uplink (DL/UL) data as well as DL/UL control data.

The RAN may include a central unit (CU) and distributed units (DUs). A NR BS (e.g., gNB, <NUM> Node B, Node B, transmit receive point (TRP), access point (AP)) may correspond to one or multiple BSs. NR cells can be configured as access cells (ACells) or data only cells (DCells). For example, the RAN (e.g., a central unit or distributed unit) can configure the cells. DCells may be cells used for carrier aggregation or dual connectivity, but not used for initial access, cell selection/reselection, or handover. In some cases, DCells may not transmit synchronization signals. In some cases, DCells may transmit synchronization signals. NR BSs may transmit downlink signals to UEs indicating the cell type. Based at least in part on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine NR BSs to consider for cell selection, access, handover, and/or measurement based at least in part on the indicated cell type.

<FIG> is a diagram <NUM> showing an example of a DL-centric subframe or wireless communication structure. 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 subframe 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 subframe. For example, the UL short burst portion <NUM> may include feedback information corresponding to the control portion <NUM> and/or the DL data portion <NUM>. Non-limiting examples of information that may be included in the UL short burst portion <NUM> include an acknowledgment (ACK) signal (e.g., a physical uplink control channel (PUCCH) ACK, a PUSCH ACK, an immediate ACK), a negative acknowledgment (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.

In some aspects, described herein, the control portion <NUM> may include an early termination indication. Additionally, or alternatively, the UL short burst portion <NUM> may include a HARQ ACK/NACK that is transmitted based at least in part on whether a repetition communication is successfully decoded.

<FIG> is a diagram <NUM> showing an example of an UL-centric subframe or wireless communication structure. The UL-centric subframe may include a control portion <NUM>. The control portion <NUM> may exist in the initial or beginning portion of the UL-centric subframe. The control portion <NUM> in <FIG> may be similar to the control portion <NUM> described above with reference to <FIG>. The UL-centric subframe 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 subframe. The UL portion may refer to the communication resources utilized to communicate UL data from the subordinate 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 subframe 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 merely 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.

A base station may enhance coverage of a wireless network by performing or configuring repetitions of a communication between the base station and a UE. For example, the UE or the base station may perform a fixed number of repetitions of the communication in different transmission time intervals (TTIs) and/or using different transmit beams for each repetition. Using different transmit beams may improve spatial diversity of the communication, and using different TTIs may improve time diversity of the communication. In a legacy network, such as <NUM>/LTE, the base station may perform beamforming for the different transmit beams, and the UE may use a single receive beam, or a small number of receive beams, to receive the different transmit beams.

However, in a <NUM>/NR network, the fixed number of repetitions may lead to inefficient resource utilization. For example, a UE or base station may be scheduled with a repetition transmission using <NUM> TTIs, but the UE or base station may only require <NUM> or <NUM> TTIs to decode the repetition transmission. Therefore, a last <NUM> or <NUM> TTIs of the repetition transmission may be wasted. Furthermore, beamforming by the base station may be transparent to the UE in <NUM>/NR. This may make it difficult to apply transmit beam diversity for repetition transmissions in <NUM>/NR, wherein the UE creates receive beams corresponding to the transmit beams to receive the transmit beams.

Some techniques and apparatuses described herein provide early termination of a repetition communication of a downlink data channel (e.g., a physical downlink shared channel (PDSCH)) based at least in part on an HARQ acknowledgement information (e.g., a HARQ ACK/NACK), which conserves resources that would otherwise be used to complete the repetition communication when decoding is completed before the end of the repetition communication. Additionally, or alternatively, some techniques and apparatuses described herein provide early termination of a repetition communication of an uplink data channel (e.g., a physical uplink shared channel (PUSCH)) based at least in part on an early termination indication, which conserves resources that would otherwise be used to complete the repetition communication when decoding is completed before the end of the repetition communication.

Furthermore, some techniques and apparatuses described herein provide for identification of one or more transmit beams to be used for a repetition communication. For example, the one or more transmit beams may be identified based at least in part on one or more of a grant, the repetition communication, information identifying the one or more transmit beams, or a rule for identifying the one or more transmit beams. In this way, multiple, different transmit beams can be used for a repetition communication (e.g., in the uplink and/or in the downlink), which improves spatial diversity of the repetition communication. By using the techniques and apparatuses described herein, coverage is improved while conserving network resources and improving spatial diversity or time diversity of communications.

A HARQ acknowledgment is described herein. In some aspects, the HARQ acknowledgment may include a negative ACK (NACK). For example, the HARQ acknowledgment may have a first value for the ACK, and may have a second value for the NACK.

<FIG> is a diagram illustrating an example <NUM> of early termination of a PDSCH repetition transmission, in accordance with various aspects of the present disclosure. The operations described in connection with <FIG> may be performed by a wireless communication device, such as a user equipment (e.g., UE <NUM>), a base station (e.g., BS <NUM>), and/or the like. <FIG> is described with reference to the UE <NUM>, but is not so limited. As shown, <FIG> includes communications in TTIs <NUM> through <NUM>, and each communication includes a DL-centric subframe, such as the wireless communication structure described in connection with <FIG>, above.

As shown in <FIG>, and by reference number <NUM>, the UE <NUM> may receive a downlink grant for a first repetition transmission that includes a first number of TTIs (e.g., <NUM> TTIs corresponding to <NUM> repetitions). In some aspects, a repetition transmission, such as the first repetition transmission or another repetition transmission or communication described herein, may include a different number of repetitions and/or TTIs (e.g., <NUM> repetitions, <NUM> repetitions, or any other number of repetitions that is greater than <NUM>). In some aspects, the repetition transmission may be referred to as a communication or a repetition communication.

As shown by the horizontal hatching in TTIs <NUM> and <NUM>, the UE <NUM> may receive downlink data in TTI <NUM> and TTI <NUM>. For example, the downlink data received in TTI <NUM> may be a repetition of the downlink data received in TTI <NUM>. The UE <NUM> may attempt to decode the downlink data received in TTIs <NUM> and <NUM> (e.g., using soft combining or a similar technique). For example, the UE <NUM> may attempt to decode the downlink data after a second number of TTIs or repetitions that is less than the first number of TTIs or repetitions. In some aspects, the second number of TTIs or repetitions may include, for example, <NUM> repetitions, <NUM> repetitions, <NUM> repetitions, and/or the like.

As shown by reference number <NUM>, the UE <NUM> may report an acknowledgment (e.g., a HARQ ACK) after <NUM> repetitions based at least in part on successfully decoding TTIs <NUM> and <NUM>. Thus, the repetitions in TTIs <NUM> and <NUM> may be terminated (e.g., since decoding of the communication is already successful). In some aspects, the BS <NUM> may indicate that the repetition in TTIs <NUM> and <NUM> is to be terminated based at least in part on the HARQ ACK. For example, the BS <NUM> may provide an indication in a dedicated bit of downlink control information (DCI) or in a downlink grant for a second repetition transmission.

As shown by reference number <NUM>, the UE <NUM> may receive a downlink grant for a second repetition transmission. As indicated above, the downlink grant for the second repetition communication may indicate that the first repetition communication is to be terminated. Therefore, and as shown, TTIs <NUM> and <NUM> may not be used for the first repetition transmission.

As shown by reference number <NUM>, in some aspects, the UE <NUM> may not transmit an acknowledgment or negative acknowledgment. For example, since the second number of repetitions has not yet occurred, the UE <NUM> may not attempt decoding of the second repetition transmission. In this way, the UE <NUM> may conserve resources that would otherwise be used to attempt decoding when a likelihood of success is low.

As shown by reference number <NUM>, in some cases, the UE <NUM> may fail to decode the repetition transmission after the second number of repetitions, and may therefore transmit a negative acknowledgment (e.g., HARQ NACK). In such a case, the BS <NUM> may continue to transmit one or more remaining repetitions of the repetition transmission. As shown by reference number <NUM>, the UE <NUM> may not transmit an acknowledgment or negative acknowledgment until the second number of repetitions has occurred again. For example, if the second number of repetitions is <NUM> repetitions, the UE <NUM> may attempt decoding, and may transmit an acknowledgment or negative acknowledgment, after <NUM> repetitions, <NUM> repetitions, <NUM> repetitions, and so on.

In some aspects, the UE <NUM> may not transmit a HARQ NACK after the second number of repetitions. For example, some aspects may not use a NACK to indicate unsuccessful decoding. In such a case, the BS <NUM> may determine that decoding was unsuccessful based at least in part on expiry of a timer. For example, the BS <NUM> may determine that no HARQ ACK has been received within a particular time window in connection with the repetition communication, and may therefore determine that the UE <NUM> was unsuccessful in decoding the repetition communication. This may conserve network resources that would otherwise be used to provide a HARQ NACK.

As shown by reference number <NUM>, the UE <NUM> may provide a HARQ ACK at TTI <NUM> based at least in part on successfully decoding the repetition transmission. In this way, the UE <NUM> may selectively cause a repetition transmission to be terminated early based at least in part on whether early decoding of the repetition transmission is successful. Thus, versatility of repetitious communications is improved, which improves compatibility of such repetitious communications with <NUM>/NR.

<FIG> is a diagram illustrating an example <NUM> of early termination of a PUSCH repetition transmission, in accordance with various aspects of the present disclosure. The operations described in connection with <FIG> may be performed by a wireless communication device, such as a user equipment (e.g., UE <NUM>), a base station (e.g., BS <NUM>), and/or the like. <FIG> is described with reference to the UE <NUM>, but is not so limited. As shown, <FIG> includes communications in TTIs <NUM> through <NUM>, and each communication includes a UL-centric subframe, such as the wireless communication structure described in connection with <FIG>, above.

As shown in <FIG>, and by reference number <NUM>, the UE <NUM> may receive an uplink grant for a first repetition transmission that includes a first number of TTIs (e.g., <NUM> TTIs corresponding to <NUM> repetitions).

As shown by reference number <NUM>, in some aspects, a latency may occur between the uplink grant and a PUSCH transmission associated with the uplink grant. In some aspects, no latency may occur. In some aspects, the latency may be greater than <NUM> TTI or less than <NUM> TTI. As shown by the vertical hatching in TTI <NUM>, the UE <NUM> may transmit a first repetition in an UL long burst portion of TTI <NUM> after the latency has elapsed.

As shown by reference number <NUM>, the UE <NUM> may receive an early termination indication. Here, the UE <NUM> receives the early termination indication in a grant of TTI <NUM>. The UE <NUM> may receive the early termination indication based at least in part on the BS <NUM> (or another receiver of the repetition transmission) successfully decoding the repetition transmission using the first repetition. As further shown, the UE <NUM> may terminate the repetition transmission based at least in part on receiving the early termination indication. For example, the UE <NUM> may not transmit the UL long burst portions of TTI <NUM> and TTI <NUM>. In this way, transmission of the repetition transmission is flexibly terminated, which improves resource utilization and compatibility with <NUM>/NR.

In some aspects, the early termination indication may include or be a dedicated bit of DCI. In some aspects, the UE <NUM> may be configured to receive an early termination indication in particular slots. For example, the particular slots may be specified in a specification. Additionally, or alternatively, the particular slots may be configurable, and a set of slots in which the early termination indication may be received can be dynamically indicated (e.g., in the uplink grant, in DCI, in radio resource control (RRC) signaling, etc.).

As shown by reference number <NUM>, the UE <NUM> may receive an uplink grant for a second repetition transmission in TTI <NUM>. As further shown, the UE <NUM> may not perform a check for the early termination indication in TTI <NUM>. In some aspects, the uplink grant may include the early termination indication. For example, the UE <NUM> may identify the uplink grant as the early termination indication, may end the first repetition transmission, and may proceed with the second repetition transmission according to the early termination indication.

As shown by reference number <NUM>, the UE <NUM> may perform the check for the early termination indication in a PDCCH of TTI <NUM>. For example, and as described above, the UE <NUM> may be configured to check particular resources for the early termination indication. As shown by reference number <NUM>, the UE <NUM> may not perform the early termination indication check for TTI <NUM>. For example, in this case, the UE <NUM> may be configured to perform the early termination indication check for every other TTI. In some aspects, the UE <NUM> may be configured with a different interval (e.g., every third TTI, every fourth TTI, every TTI, and/or the like).

As shown by reference number <NUM>, the UE <NUM> may perform the early termination indication check in TTI <NUM>. As further shown, the UE <NUM> does not receive the early termination indication in TTI <NUM>. Therefore, the UE <NUM> may transmit the UL long burst portion of TTI <NUM>, which may include the final repetition of the repetition communication. In this way, the repetition communication can be selectively terminated early, which improves flexibility of the repetition communication and compatibility with <NUM>/NR.

<FIG> is a diagram illustrating an example <NUM> of determination of a plurality of beams for a repetition transmission, in accordance with various aspects of the present disclosure. <FIG> describes operations that can be performed in the uplink, in the downlink, or in both the uplink and the downlink. Therefore, unless specified otherwise, the operations described in <FIG> are applicable in the uplink, in the downlink, or in both the uplink and the downlink.

As shown in <FIG>, and by reference number <NUM>, the BS <NUM> may provide a grant to the UE <NUM>. As further shown, in some aspects, the grant may be a downlink grant. In some aspects, the grant may be an uplink grant.

As shown by reference number <NUM>, the grant may be for a repetition communication. For example, when the grant is an uplink grant, the repetition communication may be a communication of two or more TTIs or repetitions to be transmitted by the UE <NUM>. When the grant is a downlink grant, the repetition may be a communication of two or more TTIs or repetitions to be transmitted by the BS <NUM> and received by the UE <NUM>.

As further shown, the grant may indicate that the repetition communication is to use multiple beams. In <NUM>/NR, a beam pair is used to communicate between the UE <NUM> and the BS <NUM>. Therefore, for the repetition communication between the UE <NUM> and the BS <NUM> to be successful, the UE <NUM> may need to know which beams to use to perform each repetition of the repetition communication. The operations described in connection with <FIG> and <FIG> provide techniques for determining which beams to use to perform (e.g., transmit or receive) each repetition of the repetition communication.

As shown by reference number <NUM>, the grant may optionally include information identifying the multiple beams. In such a case, the UE <NUM> may identify the multiple beams based at least in part on the information identifying the multiple beams. For a more detailed description of this determination, refer to the description associated with reference number <NUM>, below. As shown by reference number <NUM>, the UE <NUM> may receive the grant for the repetition communication using the multiple beams.

As shown by reference number <NUM>, the UE <NUM> may identify the multiple beams to be used for the repetition communication. The UE <NUM> may identify the multiple beams so that beam pairing between the UE <NUM> and the BS <NUM> for the repetition communication is successful. As used herein, the multiple beams may refer to transmit beams generated by the BS <NUM> for the repetition communication in the downlink, to receive beams generated by the UE <NUM> for the repetition communication in the downlink, to transmit beams generated by the UE <NUM> for the repetition communication in the uplink, to receive beams generated by the BS <NUM> for the repetition communication in the uplink, or to any combination of the above. As shown by reference number <NUM>, the UE <NUM> and the BS <NUM> may perform the repetition communication using the multiple beams.

In some aspects, a transmit beam for a first repetition of the repetition communication may be indicated or identified in the grant. In such a case, transmit beams for subsequent repetitions of the repetition communication may be determined by the UE <NUM> based at least in part on a rule. For example, the rule may identify a beam cycling pattern for repetition communications. In some aspects, the beam cycling pattern may be based at least in part on an index of a slot in which the grant is received, an index of a slot in which a repetition is to be transmitted or received, and/or a combination of the above.

In some aspects, the beam cycling pattern may be defined in a relevant specification. Additionally, or alternatively, the beam cycling pattern may be configured based at least in part on higher layer signaling. For example, the UE <NUM> may be configured with multiple cycling patterns, and one of the patterns may be selected based at least in part on information in the grant, a DCI, a media access control (MAC) control element (CE), an RRC signaling, and/or the like. In this way, radio resources may be conserved that would otherwise be used to transmit information identifying each beam of the beam cycling pattern.

In some aspects, a beam for each repetition may be indicated in the grant. For example, the grant may identify a plurality of beams corresponding to a plurality of repetitions of the repetition transmission. In this way, processor resources of the UE <NUM> may be conserved in comparison to determining the beam cycling pattern and/or beam mapping by the UE <NUM>.

In some aspects, the UE <NUM> may receive information identifying a set of beams, and an association between the set of beams and the repetitions may indicate which beams are to be used for which repetitions. For example, the UE <NUM> may receive information identifying transmit beams <NUM>, <NUM>, <NUM>, and <NUM>, and may determine a mapping of transmit beams <NUM>, <NUM>, <NUM>, and <NUM> to four repetitions. In some aspects, the UE <NUM> may determine the mapping based at least in part on a slot in which the grant is received. In some aspects, the UE <NUM> may determine the mapping based at least in part on information indicating the mapping. For example, the mapping may be dynamically indicated. In some aspects, the UE <NUM> may store information identifying multiple, different mappings, and may receive an indication of which mapping, of the multiple, different mappings, is to be used.

In some aspects, when the UE <NUM> is to identify transmit beams for an uplink repetition transmission by the UE <NUM>, the UE <NUM> may identify the transmit beams based at least in part on a beam correspondence between the transmit beams and receive beams of the UE <NUM>. For example, the UE <NUM> may receive information identifying transmit beams of the BS <NUM> that are used to communicate with the UE <NUM>. The UE <NUM> may determine a mapping of the transmit beams of the BS <NUM> to receive beams of the UE <NUM>. The receive beams of the UE <NUM> may correspond to transmit beams of the UE <NUM>. For example, the UE <NUM> may use the receive beams as the transmit beams to transmit the uplink repetition transmission. In this way, the BS <NUM> may indicate transmit beam capabilities of the BS <NUM>, and the UE <NUM> may determine transmit beams for the uplink repetition communication based at least in part on the transmit beam capabilities of the BS <NUM>.

<FIG> are diagrams illustrating examples <NUM> of determination of a plurality of beams for a repetition transmission, in accordance with various aspects of the present disclosure. <FIG> describe techniques for identifying transmit beams for repetition communications that are associated with an initial transmission and one or more retransmissions, such as HARQ retransmissions. The techniques described in connection with <FIG> are applicable in the uplink, the downlink, and both the uplink and the downlink.

<FIG> relates to a case wherein a cycling pattern indicates that a different beam is used for each retransmission. As shown in <FIG>, and by reference number <NUM>, assume a beam cycling pattern of i<NUM>, i<NUM>, i<NUM> is configured for an initial transmission, a first retransmission, and a second retransmission. Thus, and as shown by reference number <NUM>, a beam i<NUM> may be used for each repetition of the initial transmission. Further, as shown by reference number <NUM>, a beam i<NUM> may be used for each repetition of the first retransmission. Further, as shown by reference number <NUM>, a beam i<NUM> may be used for each repetition of the second retransmission. The technique described in connection with <FIG> may simplify implementation and reduce time associated with retuning of transmit beams and/or receive beams.

<FIG> relates to a case wherein a cycling pattern indicates that a different beam is used for each retransmission, and wherein a beam mapping is derived based at least in part on the cycling pattern. As shown by reference number <NUM>, assume a beam cycling pattern of i<NUM>, i<NUM>, i<NUM> is configured for an initial transmission, a first retransmission, and a second retransmission, as described in more detail above. As further shown, a function fk may be used to determine a beam mapping, and the beam mapping may be used to determine output beams for the initial transmission and the retransmissions based at least in part on the beam cycling pattern. For example, fk may map a beam for a kth repetition to the inth beam associated with a particular transmission and/or retransmission. In some aspects, fk may be defined to be different for an initial transmission than for a retransmission, as described in more detail below.

As shown by reference number <NUM>, a first repetition of the initial transmission may use a beam f<NUM>(i<NUM>). As shown by reference number <NUM>, a second repetition of the initial transmission may use a beam f<NUM>(i<NUM>). Thus, spatial diversity is achieved within a single transmission. Furthermore, and as shown by reference number <NUM>, a first repetition of the first retransmission may use a beam f<NUM>(i<NUM>). In this way, spatial diversity is also achieved between a same repetition of two different transmissions or retransmissions.

<FIG> relates to a case wherein a cycling pattern indicates that a different beam is used for each repetition of a transmission, and wherein a beam mapping is derived based at least in part on the cycling pattern. As shown in <FIG>, and by reference number <NUM>, the cycling pattern may be indicated for each transmission. For example, the beam cycling pattern may indicate that the UE <NUM> is to use beams i<NUM>, i<NUM>, i<NUM>, i<NUM> for the four repetitions of the initial transmission, as shown by reference number <NUM>.

As further shown, the UE <NUM> may use a function gjk to determine the beam mapping for the first retransmission and the second retransmission. The function gjk may map a beam pattern to the ith beam used for the kth repetition in the jth HARQ retransmission, as described in more detail below. An output beam for each repetition of each HARQ transmission or retransmission may be determined according to the mapping of the beam pattern to the ith beam, the kth repetition, and thejth HARQ retransmission.

For example, and as shown by reference number <NUM>, a beam for a first repetition of a first retransmission of the repetition communication may be determined based at least in part on g<NUM>(i<NUM>, i<NUM>, i<NUM>, i<NUM>), whereas a beam for a second repetition of the first retransmission of the repetition communication may be determined based at least in part on g<NUM>(i<NUM>, i<NUM>, i<NUM>, i<NUM>). In this way, spatial diversity is achieved between the first repetition and the second repetition. Furthermore, and as shown, a beam for a first repetition of a second retransmission of the repetition communication may be determined based at least in part on g<NUM>(i<NUM>, i<NUM>, i<NUM>, i<NUM>). In this way, spatial diversity is achieved between the first repetitions of different retransmissions. Furthermore, by determining beam mappings based at least in part on the beam pattern for the entire transmission, rather than a single beam prescribed by the beam pattern for a particular repetition, versatility of the beam determination is improved.

In some aspects, different beam patterns may be configured or prescribed for different HARQ transmissions or retransmissions. For example, a first beam pattern may be configured or identified for an initial transmission, and a second beam pattern may be configured or identified for a first retransmission. In such a case, the second beam pattern may be different than the first beam pattern. For example, the second beam pattern may have an offset in the spatial domain from the first beam pattern, which improves spatial diversity of the initial transmission and the first retransmission.

In some aspects, the transmit beams may be determined based at least in part on a beam cycling technique and a frequency hopping technique. In such a case, the frequency hopping interval of the frequency hopping technique may be configured to be longer than or equal to the beam cycling technique. For example, the beam cycling may be performed for a block size or bundle size of X, and the frequency hopping may be performed for a block size or bundle size of Y, wherein Y is greater than or equal to X. This may allow coherent combining of X slots of the transmission. For example, for a <NUM>-slot repetition, <NUM> beams can be configured. For every <NUM> slots, a new beam may be used. Thus, coherent combining can be performed for every <NUM> slots, assuming that the frequency hopping interval Y is greater than <NUM>. In some aspects, when frequency hopping is used, beam cycling may be disabled. Additionally, or alternatively, when beam cycling is used, frequency hopping may be disabled.

<FIG> is a diagram illustrating an example process <NUM> performed, for example, by a user equipment, in accordance with various aspects of the present disclosure. Example process <NUM> is an example where a user equipment (e.g., UE <NUM>) performs early transmission of a PDSCH repetition transmission.

As shown in <FIG>, in some aspects, process <NUM> includes receiving a grant for a transmission having a first number of repetitions, wherein a user equipment is configured to selectively provide an acknowledgment for the transmission after a second number of repetitions that is less than the first number of repetitions (block <NUM>). For example, the user equipment (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) receives a grant for a transmission having a first number of repetitions. The user equipment is configured to selectively provide an acknowledgment after a second number of repetitions that is less than the first number of repetitions. For example, the user equipment provides the acknowledgment when the user equipment successfully decodes the transmission after the second number of repetitions so that a base station ceases transmitting repetitions of the transmission. When the user equipment does not provide the acknowledgment after the second number of repetitions, or when the user equipment provides a NACK, the base station may know that decoding of the transmission was unsuccessful.

As shown in <FIG>, in some aspects, process <NUM> includes attempting to decode the transmission after the second number of repetitions (block <NUM>). For example, the user equipment (e.g., using controller/processor <NUM> and/or the like) attempts to decode the transmission after the second number of repetitions.

As shown in <FIG>, in some aspects, process <NUM> includes selectively providing the acknowledgment after the second number of repetitions based at least in part on a result of attempting to decode the transmission (block <NUM>). For example, the user equipment (e.g., using controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, antenna <NUM>, and/or the like) provides the acknowledgment when the attempt to decode the transmission after the second number of repetitions is successful. Additionally, or alternatively, the user equipment does not provide the acknowledgment when the attempt to decode the transmission after the second number of repetitions is unsuccessful. In some aspects, the user provides the acknowledgment to cause one or more remaining repetitions of the transmission not to be performed.

In some aspects, when the acknowledgment is provided, the method further comprises receiving an indication that the one or more remaining repetitions are not to be performed, wherein the information is a dedicated bit of downlink control information. In some aspects, the indication is a dedicated bit of downlink control information. In some aspects, the grant is a first grant for a first transmission, and the indication is a second grant for a second transmission. In some aspects, another acknowledgment is selectively provided for the second transmission after the second number of repetitions based at least in part on attempting to decode the second transmission.

In some aspects, the acknowledgment is provided based at least in part on the attempt to decode being successful. In some aspects, when the acknowledgment is not provided after the second number of repetitions, the user equipment may receive the one or more remaining repetitions, attempt to decode the one or more remaining repetitions, and/or selectively provide the acknowledgment based at least in part on a result of attempting to decode the one or more remaining repetitions, wherein, when the one or more remaining repetitions are not successfully decoded, the acknowledgment is not provided. In some aspects, the transmission is a downlink shared channel transmission or a downlink control channel transmission.

<FIG> is a diagram illustrating an example process <NUM> performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process <NUM> is an example where a user equipment (e.g., UE <NUM>) performs early termination of a PUSCH repetition transmission.

As shown in <FIG>, in some aspects, process <NUM> includes receiving a grant for an uplink transmission associated with a number of repetitions (block <NUM>). For example, the user equipment (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) receives a grant for an uplink transmission to be transmitted by the user equipment. The uplink transmission is associated with a number of repetitions. In some aspects, the uplink transmission is associated with a number of retransmissions. For example, the uplink transmission includes or is associated with two retransmissions of four repetitions each, three retransmissions of four repetitions each, and/or a different number of retransmissions and/or repetitions.

As shown in <FIG>, in some aspects, process <NUM> includes determining whether an indication that the uplink transmission is to be terminated before the number of repetitions is received (block <NUM>). For example, the user equipment (e.g., using controller/processor <NUM> and/or the like) determines an indication is received (e.g., in particular resources). The indication indicates that the uplink transmission is to be terminated before the number of repetitions is performed or transmitted. For example, a base station provides the indication when the base station has successfully decoded the uplink transmission before the prescribed number of repetitions (e.g., and/or retransmissions).

As shown in <FIG>, in some aspects, process <NUM> includes selectively terminating the uplink transmission before the number of repetitions based at least in part on whether the indication is received (block <NUM>). For example, the user equipment (e.g., using controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, antenna <NUM>, and/or the like) selectively terminates the uplink transmission before the number of repetitions based at least in part on whether the indication is received. In some aspects, the user equipment terminates the uplink transmission when the indication is received. In some aspects, the user equipment does not terminate the uplink transmission (e.g., may continue to perform or transmit the repetitions) when the indication is not received.

In some aspects, the determination of whether the indication is received is performed periodically. In some aspects, the uplink transmission is completed when the indication is not received. In some aspects, the indication is transmitted after a subset of repetitions of the number of repetitions. In some aspects, the determination of whether the indication is received is performed by checking a particular resource. In some aspects, the particular resource is indicated in the grant. In some aspects, the particular resource is configured or selected from multiple sets of resources in which the indication can be provided. In some aspects, the indication is a dynamic indication. In some aspects, the grant is a first grant and the indication is a second grant. In some aspects, a subset of the number of repetitions is transmitted after a configured delay after the grant is received.

<FIG> is a diagram illustrating an example process <NUM> performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process <NUM> is an example where a user equipment (e.g., UE <NUM>) performs determination of a plurality of beams for a repetition transmission.

As shown in <FIG>, in some aspects, process <NUM> may include receiving a grant for a communication of multiple repetitions, wherein the multiple repetitions are to be transmitted using multiple, different transmit beams (block <NUM>). For example, the user equipment (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) may receive a grant for a communication of multiple repetitions. The multiple repetitions are to be transmitted using multiple, different transmit beams. For example, each repetition may be transmitted using a different transmit beam. Additionally, or alternatively, two or more repetitions may be transmitted using different transmit beams. Additionally, or alternatively, a repetition and a retransmission of the repetition may be transmitted using different beams.

As shown in <FIG>, in some aspects, process <NUM> may include identifying the multiple, different transmit beams based at least in part on at least one of the grant, the multiple repetitions, information identifying the multiple, different transmit beams, or a rule for identifying the multiple, different transmit beams (block <NUM>). For example, the user equipment (e.g., using controller/processor <NUM> and/or the like) may identify the multiple, different transmit beams. In some aspects, the user equipment may identify the multiple, different transmit beams based at least in part on at least one of the grant, the multiple repetitions, information identifying the multiple, different transmit beams (e.g., received from a base station and/or other information), or a rule for identifying the multiple, different transmit beams.

In some aspects, the multiple, different transmit beams are to be transmitted by the user equipment. In some aspects, the multiple, different transmit beams are to be received by the user equipment. In some aspects, the grant identifies a transmit beam for a first repetition of the communication, and wherein at least one of the multiple, different transmit beams is identified based at least in part on the transmit beam for the first repetition and based at least in part on the rule.

In some aspects, the rule identifies a cycling pattern for the multiple, different transmit beams with regard to the multiple repetitions based at least in part on at least one of a slot in which the grant was received, or a slot in which one of the multiple repetitions is to be communicated. In some aspects, the rule identifies a cycling pattern for the multiple, different transmit beams with regard to the multiple repetitions based at least in part on a slot in which one of the multiple repetitions is to be communicated. In some aspects, the information identifying the multiple, different transmit beams is received in at least one of the grant, downlink control information, a media access control (MAC) control element (CE), or a radio resource control (RRC) signaling.

In some aspects, the user equipment is configured to store information identifying multiple, different cycling patterns for transmit beams, and the information identifying the multiple, different transmit beams identifies a selected cycling pattern of the multiple, different cycling patterns. In some aspects, the information identifying the multiple, different transmit beams identifies a respective transmit beam for each repetition of the multiple repetitions. In some aspects, the information identifying the multiple, different transmit beams is indicated in the grant. In some aspects, the information identifying the multiple, different transmit beams identifies a set of transmit beams, and the multiple, different transmit beams are identified from the set of transmit beams based at least in part on a slot in which the grant is received.

In some aspects, the information identifying the multiple, different transmit beams identifies a set of transmit beams, and the multiple, different transmit beams are identified from the set of transmit beams based at least in part on information indicating a correspondence between the multiple, different transmit beams and the multiple repetitions. In some aspects, the information identifying the multiple, different transmit beams identifies a plurality of transmit beams transmitted by a base station (e.g., BS <NUM>), and the user equipment is configured to identify a plurality of beams of the multiple, different transmit beams based at least in part on the plurality of transmit beams transmitted by the base station and a beam correspondence between the plurality of beams and a plurality of receive beams, of the user equipment, corresponding to the multiple, different transmit beams.

In some aspects, the communication is a first transmission of a plurality of transmissions, wherein each transmission of the plurality of transmissions includes a respective plurality of repetitions, and wherein one or more transmit beams of the multiple, different transmit beams are identified for each plurality of repetitions of the respective plurality of repetitions. In some aspects, a first transmit beam, of the one or more transmit beams, is used for the multiple repetitions of the first transmission and a second transmit beam, of the one or more transmit beams, is used for a plurality of repetitions, of the respective pluralities of repetitions, of a second transmission of the plurality of transmissions. In some aspects, the one or more transmit beams are identified based at least in part on a cycling pattern associated with the multiple, different transmit beams and based at least in part on a particular repetition for which the one or more transmit beams are to be transmitted. In some aspects, a first transmit beam cycle is used for the multiple repetitions of the first transmission, and a second transmit beam cycle is determined, based at least in part on the first transmit beam cycle, for a plurality of repetitions, of the respective pluralities of repetitions, of a second transmission of the plurality of transmissions. In some aspects, a first transmit beam cycle is used for the multiple repetitions of the first transmission and a second transmit beam cycle is used for a plurality of repetitions, of the respective pluralities of repetitions, of a second transmission of the plurality of transmissions, and the second transmit beam cycle is associated with a different beam pattern than the first transmit beam cycle.

In some aspects, the multiple, different beams are determined based at least in part on at least one of a beam cycling technique or a frequency hopping technique. In some aspects, a frequency hopping interval is configured to be longer than or equal to a beam cycling interval of the communication. In some aspects, the multiple, different beams are determined based at least in part on a beam cycling technique, and wherein a frequency hopping configuration of the user equipment is disabled. In some aspects, the multiple, different beams are determined based at least in part on a frequency hopping technique, and wherein a beam cycling configuration of the user equipment is disabled.

Claim 1:
A method of wireless communication (<NUM>) performed by a user equipment, comprising:
receiving a grant for a transmission having a first number of repetitions, wherein the user equipment is configured to selectively provide an acknowledgment for the transmission after a second number of repetitions that is less than the first number of repetitions (<NUM>);
attempting to decode the transmission after the second number of repetitions (<NUM>); and
selectively providing the acknowledgment after the second number of repetitions based at least in part on a result of attempting to decode the transmission, wherein providing the acknowledgement is to cause one or more remaining repetitions of the transmission not to be performed, (<NUM>).