DYNAMIC PUCCH REPETITION INDICATION

Aspects presented herein relate to methods and devices for wireless communication including an apparatus, e.g., a UE and/or a base station. The apparatus may receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions. The apparatus may also receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions. The apparatus may also transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions.

TECHNICAL FIELD

The present disclosure relates generally to communication systems, and more particularly, to physical uplink control channel (PUCCH) reporting in wireless communication systems.

INTRODUCTION

BRIEF SUMMARY

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a user equipment (UE). The apparatus may receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions. The apparatus may also receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions. Further, the apparatus may select one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size. The apparatus may also transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a base station. The apparatus may transmit, to a user equipment (UE), a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions. The apparatus may also transmit, to the UE, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions. The apparatus may also receive, from the UE, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions.

DETAILED DESCRIPTION

Referring again toFIG.1, in certain aspects, the UE104may include a reception component198configured to receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions. Reception component198may also be configured to receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions. Reception component198may also be configured to select one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size. Reception component198may also be configured to transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions.

Referring again toFIG.1, in certain aspects, the base station180may include a transmission component199configured to transmit, to a user equipment (UE), a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions. Transmission component199may also be configured to transmit, to the UE, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PM) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PM corresponding to the number of PUCCH repetitions. Transmission component199may also be configured to receive, from the UE, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions.

FIG.4is a diagram400illustrating PUCCH formats402, a PUCCH format configuration information element (IE)404, and a PUCCH resource IE406. Some aspects of wireless communication, e.g., new radio (NR), may define multiple (e.g., five) PUCCH formats with a short/long duration, different payload size ranges, and different multiplexing capabilities. PUCCH format0is a short PUCCH format with1-2UCI bits, where the waveform is a computer generated sequence (CGS). PUCCH format1is a long PUCCH format with1-2UCI bits, using time division orthogonal cover codes (TD-OCC), where the waveform is a CGS. PUCCH format2is a short PUCCH format with greater than 2 UCI bits, where the waveform is OFDM. PUCCH format3is a long PUCCH format with greater than 2 UCI bits and no multiplexing capability, where the waveform is DFT-s-OFDM. PUCCH format4is a long PUCCH format with greater than 2 UCI bits and multiplexing capability, where the waveform is DFT-s-OFDM.

PUCCH resources may be configured via RRC signaling through the PUCCH resource IE406. In some aspects, up to 128 PUCCH resources may be configured. The PUCCH format for each PUCCH resource may be a part of the RRC configuration. That is, the PUCCH resource IE406may include a format field defining the PUCCH format (e.g., one of the five formats) for that PUCCH resource. Also, a spatial relation (e.g., a beam) may be activated by a MAC-CE per PUCCH resource. For multiplexing HARQ-ACK in a PUCCH resource, DCI (e.g., a DCI format that schedules PDSCH and the corresponding HARQ-ACK information) may indicate a PUCCH resource indicator (PM). The PUCCH resource may be indicated by a PRI within DCI. Accordingly, a PUCCH resource may be selected dynamically (i.e., dynamically configured for a UE) for an HARQ-ACK transmission.

PUCCH repetitions in different slots may be supported for certain PUCCH formats, e.g., PUCCH formats1,3, and4. A number of PUCCH repetitions may be RRC configured for a given PUCCH format through the ‘number of slots’ (nrofSlots) field (e.g., 2, 4, or 8 slots) within the PUCCH format configuration IE404. The format field nrofSlots may be referred to as a PUCCH format repetition configuration404a. As the PUCCH format configuration IE404configures a format with the same PUCCH format repetition configuration404a, all PUCCH resources with that format may have the same PUCCH format repetition configuration404a(i.e., the same number of PUCCH repetitions). Likewise, the PUCCH inter-slot frequency hopping configuration may be RRC configured for a given PUCCH format through the field ‘interslotFrequencyHopping’ within the PUCCH format configuration IE404. The format field interslotFrequencyHopping may be referred to as a PUCCH format inter-slot frequency hopping configuration404b. As the PUCCH format configuration IE404configures a format with the same PUCCH format inter-slot frequency hopping configuration404b, all PUCCH resources with that format may have the same PUCCH format inter-slot frequency hopping configuration404b(i.e., with inter-slot frequency hopping disabled/enabled). The same PUCCH resource may be used across all the repetitions in different slots. In one example, one PUCCH-SpatialRelationlnfo (e.g., beam) may be used. Also, the same symbols may be used in each slot.

As discussed supra, the format field interslotFrequencyHopping may be referred to as a PUCCH format inter-slot frequency hopping configuration404b. If interslotFrequencyHopping is enabled for a PUCCH format, the UE may transmit the PUCCH for the PUCCH format starting from a first physical resource block (PRB), provided by a starting PRB (startingPRB) in slots with an even number, and starting from the second PRB, provided by a second hop PRB (secondHopPRB) in slots with an odd number. The slot indicated to the UE for the first PUCCH transmission may have a number0. Also, a UE may not expect to be configured to perform frequency hopping for a PUCCH transmission within a slot.

For PUCCH repetitions, the number of PUCCH repetitions may be semi-statically configured through RRC signaling. As such, the number of PUCCH repetitions may not be flexibly controlled. As discussed supra, the PUCCH repetition may be configured per PUCCH format. As such, all PUCCH transmissions with that PUCCH format may have the same number of PUCCH repetitions. For example, it may not be possible to have no PUCCH repetitions (e.g., one PUCCH repetition) for a first PUCCH transmission with PUCCH format1while having two PUCCH repetitions for a second PUCCH transmission with PUCCH format1unless RRC reconfigures the number of PUCCH repetitions for PUCCH format1. There may be no options available for dynamically indicating the number of PUCCH repetitions for a PUCCH resource, such as via a MAC-CE or DCI.

In a first configuration, a number of PUCCH repetitions and/or inter-slot (or inter-repetition) frequency hopping may be RRC configured per PUCCH resource configuration (e.g., instead of per PUCCH format, or overriding the configuration per PUCCH format). For example, the PUCCH resource IE406may provide a PUCCH resource configuration associated with a PUCCH resource. The PUCCH resource configuration for the PUCCH resource may indicate a PUCCH resource repetition configuration406athrough, for example, the field nrofSlots (indicated in bold inFIG.4), and/or a PUCCH resource inter-slot frequency hopping configuration406bthrough, for example, the field interslotFrequencyHopping (indicated in bold inFIG.4). Both the PUCCH resource repetition configuration406aand the PUCCH resource inter-slot frequency hopping configuration406bmay be specifically for the PUCCH resource and may be independent of PUCCH formats.

For an HARQ-ACK transmission, DCI may include a PRI field that indicates a PUCCH resource with a number of PUCCH repetitions. Accordingly, dynamic indication of the number of PUCCH repetitions may be achieved by dynamic indication of a PUCCH resource. For periodic CSI/scheduling request (SR) (e.g., PUCCH resource is RRC configured without DCI signaling) as well as HARQ-ACK, configuring the PUCCH repetition and PUCCH inter-slot frequency hopping for a PUCCH resource may enable using the same PUCCH format with a different number of PUCCH repetitions by using different PUCCH resources. Accordingly, PUCCH repetitions and PUCCH inter-slot frequency hopping may be more flexibly configured.

Additionally, a MAC-CE may update, overwrite, or enable the number of PUCCH repetitions per PUCCH resource. The MAC-CE may update the spatial relation information (e.g., beam) for a given PUCCH resource. The same MAC-CE message may be used for this purpose, for example, by adding a field to the MAC-CE. In a first configuration, a MAC-CE may indicate the number of PUCCH repetitions. In a second configuration, a MAC-CE may activate or deactivate more than one PUCCH repetition. For example, more than one PUCCH repetition may be configured as part of the PUCCH resource configuration, but a MAC-CE may include one bit to indicate whether that number is used or no repetition is assumed (i.e., one repetition). If the number of PUCCH repetitions is not configured via RRC signaling, but a MAC-CE indicates a PUCCH repetition is activated, a default number of PUCCH repetitions (e.g., two PUCCH repetitions) may be assumed. A MAC-CE may also enable or disable PUCCH inter-slot frequency hopping when a PUCCH repetition is enabled or the number of PUCCH repetitions is indicated to be greater than one.

With respect to conflict resolution of a legacy RRC configuration through the PUCCH format configuration IE404versus the aforementioned RRC configuration through the PUCCH resource IE406, if the number of PUCCH repetitions/PUCCH inter-slot frequency hopping (i.e., enabled or disabled) is configured for a PUCCH format, a UE may determine whether to use the PUCCH format repetition configuration404aor the PUCCH resource repetition configuration406a, and may determine whether to use the PUCCH format inter-slot frequency hopping configuration404bor the PUCCH resource inter-slot frequency hopping configuration406b. If a PUCCH resource that is configured with that PUCCH format is configured (e.g., via RRC signaling) or activated (e.g., via a MAC-CE) with a different number of PUCCH repetitions or a different configuration of PUCCH inter-slot frequency hopping, the UE may override the PUCCH format repetition configuration404awith the PUCCH resource repetition configuration406aand override the PUCCH format inter-slot frequency hopping configuration404bwith the PUCCH resource inter-slot frequency hopping configuration406b. That is, the PUCCH resource parameters may overwrite/override the PUCCH format parameters. If a PUCCH resource that is configured with that PUCCH format is not configured or activated with a number of PUCCH repetitions or a configuration of PUCCH inter-slot frequency hopping, in a first configuration, the RRC configuration of the PUCCH format may be assumed (for a PUCCH repetition and/or PUCCH inter-slot frequency hopping) when a PUCCH is transmitted using the PUCCH resource. In a second configuration, no PUCCH repetition and/or no PUCCH inter-slot frequency hopping may be assumed when a PUCCH is transmitted using the PUCCH resource.

In some aspects of wireless communications, the number of slot-based PUCCH repetitions may be configured by higher layers for each PUCCH format. Considering mixed traffic types for a UE and different traffic types may have different reliabilities and latencies, a different number of repetitions (e.g., either slot-based or sub-slot based) may be utilized for a PUCCH associated with different traffic types and/or UCI types (e.g., HARQ ACK, scheduling request (SR), CSI). Moreover, since the channel condition may be dynamically changed, PUCCH repetition numbers by semi-static indication may result in an unnecessary resource waste or low transmission reliability. Therefore, the number of PUCCH repetitions may be indicated by DCI dynamically.

The number of PUCCH repetitions may be configured per PUCCH format or per PUCCH resource. When a PUCCH is scheduled, the number of PUCCH repetitions configured for the PUCCH may be applied. However, a PUCCH resource may be scheduled for multiple types of transmissions. For example, a PUCCH resource may be scheduled for periodic or semi-persistent transmissions of a CSI report, which may be referred as a periodic (P) or semi-persistent (SP) PUCCH transmission, and the PUCCH may also be scheduled with an aperiodic transmission for an aperiodic CSI report, which may be referred to as an aperiodic (AP) PUCCH transmission. So if the repetition number is configured per PUCCH format or PUCCH resource to a PUCCH resource, all of periodic, semi-persistent, or aperiodic transmissions related to the same PUCCH resource may be impacted and use the same number of repetitions. For example, when a same PUCCH resource is used for different types of transmissions, e.g., one for a periodic CSI report and another for an ACK/NACK transmission, both the periodic CSI and the ACK/NACK transmission may use the same number of PUCCH repetitions associated with the PUCCH resource or PUCCH format. Based on the above, it may be beneficial to dynamically indicate a PUCCH repetition number. For instance, it may be beneficial to include an RRC message and/or DCI with a dynamic PUCCH repetition number.

Aspects of the present disclosure may include a PUCCH via DCI with a dynamic PUCCH repetition number. For instance, when a UE is enabled to be indicated with a dynamic PUCCH repetition number, the repetition number may be indicated by an enhanced existing DCI field. Aspects of the present disclosure may include a PUCCH resource indicator (PRI), where each PRI codepoint is associated with a repetition number. Additionally, aspects of the present disclosure may include a PDSCH-to-HARQ feedback timing indicator (which is to indicate the slot offset K1, from a PDSCH reception to the transmission of HARQ feedback), where each K1 codepoint is associated with a repetition number.

Table 1 above shows a PRI or K1 codepoints in a DCI field, as well as a number of repetitions. As shown in Table 1, ResourceList-v17xy or D1-DataToUL-ACK-v17 may have a list of values for the number of PUCCH repetitions. For example, ResourceList-v17xy may be configured as above with a list of the repetition number PUCCH-ResourceandNumR-v17xy which is to provide a number of PUCCH repetitions of either two repetitions (n2), four repetitions (n4), eight repetitions (n8), or sixteen repetitions (n16). For example, ResourceList-v17xy::=SEQUENCE (SIZE(1 . . . maxNrofPUCCH-ResourcesPerSet)) OF PUCCH-ResourceandNumR-v17xy. In some instances, PUCCH-ResourceandNumR-v17xy::=SEQUENCE {repetitionNumber-r17 ENUMERATED {n2, n4, n8, n16}}.

In another example, D1-DataToUL-ACK-v17 may be configured as above with a list of the repetition number D1-DataToUL-ACKandNumR which is to provide a number of PUCCH repetitions of either two repetitions (n2), four repetitions (n4), eight repetitions (n8), or sixteen repetitions (n16). Also, D1-DataToUL-ACK-v17::=SEQUENCE (SIZE(1 . . . I)) OF D1-DataToUL-ACKandNumR, and D1-DataToUL-ACKandNumR::=SEQUENCE {repetitionNumber-r17 ENUMERATED {n2, n4, n6, n8, n16}}.

FIG.5is a diagram500illustrating example PUCCH resource allocation.FIG.5includes a second PUCCH resource set and a third PUCCH resource set.

Additionally,FIG.5shows that PUCCH resources in each PUCCH resource set are associated with PRI 0, PRI 1, PRI 2, and PRI 3, as well as a number of repetitions (rep #), e.g., two repetitions or four repetitions. As shown inFIG.5, a PUCCH resource set may be firstly determined based on a UCI size, and a PUCCH resource and repetition number may be secondly determined based on an enhanced PRI indication in the DCI.

Tables 2 and 3 below depict different codepoints in a DCI field. More specifically, Table 2 shows K1 codepoints in a DCI field, as well as a number of repetitions. In addition, Table 3 shows PRI codepoints in a DCI field, as well as a number of repetitions. By using enhanced PRI or K1 codepoints to indicate the number of PUCCH repetitions, two different DCI codepoints may have the same value of PRI or K1 value to the indicated PUCCH resource, but the number of PUCCH repetitions may be different. For example, in Table 2, both the first and the second K1 codepoints indicate a K1 value of 2, while the number of PUCCH repetitions (Rep) are respectively 2 and 4.

In some aspects, when a dynamic number of PUCCH repetitions is indicated by DCI, the dynamic number of PUCCH repetitions may overwrite the semi-statically configured number of PUCCH repetitions for the PUCCH transmission scheduled by the DCI. For example, inFIG.5, if a PUCCH resource is used for a periodic (P) CSI report, and also for ACK/NACK feedback, when the PUCCH is transmitted for a P-CSI report, a first number of PUCCH repetitions may be used which is semi-statically configured to the PUCCH format or PUCCH resource, and when the PUCCH is transmitted for ACK/NACK feedback, a second number of PUCCH repetitions may be used which is indicated by DCI and the first number of PUCCH repetitions may not be used.

An indicated PUCCH repetition number from the DCI may be associated with a number of options. For instance, the indicated PUCCH repetition number may be an overall repetition number. In this case, the number may count both PUCCH repetitions of different beam information. For example, if the indicated PUCCH repetition number is 4, and two types of beam information (UL TCI1and UL TCI2, or spatial relation information1and spatial relation information2) are indicated for the PUCCH, the number of PUCCH repetitions may be 2 for each type of beam information.

Additionally, the indicated PUCCH repetition number may be an actual repetition number or a beam indicated number. In this case, the same number may apply for a PUCCH repetition of different beam information. For example, if the indicated PUCCH repetition number is 2, and two types of beam information (UL TCI1and UL TCI2, or spatial relation information1and spatial relation information2) are indicated for the PUCCH, the number of PUCCH repetitions may be 2 for each type of beam information.

Further, the indicated PUCCH repetition number may be a scale of the PUCCH repetition number configured per PUCCH format or per PUCCH resource. For example, if the PUCCH repetition configured for a PUCCH format is 4, the indicated number may be 0.5 or 2. Also, there may be two PUCCH repetitions if the indicated dynamic number of PUCCH repetitions is 0.5, and eight PUCCH repetitions if the indicated dynamic number of PUCCH repetitions is 2.

FIGS.6A,6B, and6Care diagrams600,610, and620, respectively, illustrating example PUCCH repetitions.FIG.6Adisplays that an indicated PUCCH repetition number may be an overall repetition number, e.g., 4. As shown inFIG.6A, the indicated PUCCH repetition number may include both PUCCH repetitions of different types of beam information. For instance, as the indicated PUCCH repetition number is 4, and two types of beam information (spatial relation information1and spatial relation information2) are indicated for the PUCCH, the number of PUCCH repetitions is 2 for each type of beam information.

FIG.6Bdisplays that an indicated PUCCH repetition number may be an actual repetition number or a beam indicated number, e.g., 2. As shown inFIG.6B, the same PUCCH repetition number may apply for a PUCCH repetition of different beam information. For instance, as the indicated PUCCH repetition number is 2, and two types of beam information (spatial relation information1and spatial relation information2) are indicated for the PUCCH, the number of PUCCH repetitions is 2 for each type of beam information.

FIG.6Cdisplays that an indicated PUCCH repetition number may be a scale of the PUCCH repetition number, e.g., 0.5 or 2. As shown inFIG.6C, the indicated PUCCH repetition number may be a scale of the PUCCH repetition number configured per PUCCH format or per PUCCH resource. For instance, if the PUCCH repetition configured for a PUCCH format is 4, the indicated number may be 0.5 or 2. As shown inFIG.6C, there are two PUCCH repetitions as the indicated dynamic number of PUCCH repetitions is 0.5. Further, there may be eight PUCCH repetitions if the indicated dynamic number of PUCCH repetitions is 2.

FIG.7is a diagram700illustrating example communication between a UE702and a base station704.

At710, base station704may transmit, to UE702, a radio resource control (RRC) message, e.g., message712, including an indication of a number of physical uplink control channel (PUCCH) repetitions.

At720, UE702may receive, from base station704, a radio resource control (RRC) message, e.g., message712, including an indication of a number of physical uplink control channel (PUCCH) repetitions. The indication may correspond to a resource list.

In some aspects, the number of PUCCH repetitions may be at least one of an overall repetition number, an actual repetition number, or a scaled value of the number of PUCCH repetitions configured based on a PUCCH format or the PUCCH resource. If the number of PUCCH repetitions is the overall repetition number, the overall repetition number may correspond to a number of PUCCH repetitions for spatial relation information1and a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the actual repetition number, the actual repetition number may apply to a number of PUCCH repetitions for spatial relation information1or a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the scaled value of the number of PUCCH repetitions, the scaled value of the number of PUCCH repetitions may be one half of the number of PUCCH repetitions or twice of the number of PUCCH repetitions.

At730, base station704may transmit, to the UE702, downlink control information (DCI), e.g., DCI732, indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions.

At740, UE702may receive, from the base station704, downlink control information (DCI), e.g., DCI732, indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PM) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions. The codepoint of the DCI may include at least one K1 value, and the at least one K1 value may correspond to the number of PUCCH repetitions. Also, the at least one K1 value may further correspond to a timing offset. The codepoint of the DCI may include the number of PUCCH repetitions, such that the number of PUCCH repetitions overwrites a previous number of PUCCH repetitions.

At750, UE702may select one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size. In some instances, the DCI may indicate the UCI size. The at least one PRI may correspond to the selected one PUCCH resource set.

At760, UE702may transmit, to the base station704, a PUCCH, e.g., PUCCH762, via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions.

At770, base station704may receive, from the UE702, a PUCCH, e.g., PUCCH762, via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions.

FIG.8is a flowchart800of a method of wireless communication. The method may be performed by a UE or a component of a UE (e.g., the UE104,350,702; the apparatus1102; a processing system, which may include the memory360and which may be the entire UE or a component of the UE, such as the TX processor368, the controller/processor359, transmitter354TX, antenna(s)352, and/or the like). The methods described herein may provide a number of benefits, such as improving communication signaling, resource utilization, and/or power savings.

At802, the UE may receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, UE702may receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, as described in connection with720inFIG.7. Further,802may be performed by determination component1140inFIG.11. The indication may correspond to a resource list.

In some aspects, the number of PUCCH repetitions may be at least one of an overall repetition number, an actual repetition number, or a scaled value of the number of PUCCH repetitions configured based on a PUCCH format or the PUCCH resource. If the number of PUCCH repetitions is the overall repetition number, the overall repetition number may correspond to a number of PUCCH repetitions for spatial relation information1and a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the actual repetition number, the actual repetition number may apply to a number of PUCCH repetitions for spatial relation information1or a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the scaled value of the number of PUCCH repetitions, the scaled value of the number of PUCCH repetitions may be one half of the number of PUCCH repetitions or twice of the number of PUCCH repetitions.

At804, the UE may receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, UE702may receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, as described in connection with740inFIG.7. Further,804may be performed by determination component1140inFIG.11. The codepoint of the DCI may include at least one K1 value, and the at least one K1 value may correspond to the number of PUCCH repetitions. Also, the at least one K1 value may further correspond to a timing offset. The codepoint of the DCI may include the number of PUCCH repetitions, such that the number of PUCCH repetitions overwrites a previous number of PUCCH repetitions.

At808, the UE may transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, UE702may transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions, as described in connection with760inFIG.7. Further,808may be performed by determination component1140inFIG.11.

FIG.9is a flowchart900of a method of wireless communication. The method may be performed by a UE or a component of a UE (e.g., the UE104,350,702; the apparatus1102; a processing system, which may include the memory360and which may be the entire UE or a component of the UE, such as the TX processor368, the controller/processor359, transmitter354TX, antenna(s)352, and/or the like). The methods described herein may provide a number of benefits, such as improving communication signaling, resource utilization, and/or power savings.

At902, the UE may receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, UE702may receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, as described in connection with720inFIG.7. Further,902may be performed by determination component1140inFIG.11. The indication may correspond to a resource list.

In some aspects, the number of PUCCH repetitions may be at least one of an overall repetition number, an actual repetition number, or a scaled value of the number of PUCCH repetitions configured based on a PUCCH format or the PUCCH resource. If the number of PUCCH repetitions is the overall repetition number, the overall repetition number may correspond to a number of PUCCH repetitions for spatial relation information1and a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the actual repetition number, the actual repetition number may apply to a number of PUCCH repetitions for spatial relation information1or a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the scaled value of the number of PUCCH repetitions, the scaled value of the number of PUCCH repetitions may be one half of the number of PUCCH repetitions or twice of the number of PUCCH repetitions.

At904, the UE may receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, UE702may receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, as described in connection with740inFIG.7. Further,904may be performed by determination component1140inFIG.11. The codepoint of the DCI may include at least one K1 value, and the at least one K1 value may correspond to the number of PUCCH repetitions. Also, the at least one K1 value may further correspond to a timing offset. The codepoint of the DCI may include the number of PUCCH repetitions, such that the number of PUCCH repetitions overwrites a previous number of PUCCH repetitions.

At906, the UE may select one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, UE702may select one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size, as described in connection with750inFIG.7. Further,906may be performed by determination component1140inFIG.11. In some instances, the DCI may indicate the UCI size. The at least one PRI may correspond to the selected one PUCCH resource set.

At908, the UE may transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, UE702may transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions, as described in connection with760inFIG.7. Further,908may be performed by determination component1140inFIG.11.

FIG.10is a flowchart1000of a method of wireless communication. The method may be performed by a base station or a component of a base station (e.g., the base station102,180,310,704; the apparatus1202; a processing system, which may include the memory376and which may be the entire base station or a component of the base station, such as the antenna(s)320, receiver318RX, the RX processor370, the controller/processor375, and/or the like). The methods described herein may provide a number of benefits, such as improving communication signaling, resource utilization, and/or power savings.

At1002, the base station may transmit, to a UE, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, base station704may transmit, to a UE, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, as described in connection with710inFIG.7. Further,1002may be performed by determination component1240inFIG.12. The indication may correspond to a resource list.

In some aspects, the number of PUCCH repetitions may be at least one of an overall repetition number, an actual repetition number, or a scaled value of the number of PUCCH repetitions configured based on a PUCCH format or the PUCCH resource. If the number of PUCCH repetitions is the overall repetition number, the overall repetition number may correspond to a number of PUCCH repetitions for spatial relation information1and a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the actual repetition number, the actual repetition number may apply to a number of PUCCH repetitions for spatial relation information1or a number of PUCCH repetitions for spatial relation information2. If the number of PUCCH repetitions is the scaled value of the number of PUCCH repetitions, the scaled value of the number of PUCCH repetitions may be one half of the number of PUCCH repetitions or twice of the number of PUCCH repetitions.

At1004, the base station may transmit, to the UE, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, base station704may transmit, to the UE, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, as described in connection with730inFIG.7. Further,1004may be performed by determination component1240inFIG.12. The codepoint of the DCI may include at least one K1 value, and the at least one K1 value may correspond to the number of PUCCH repetitions. Also, the at least one K1 value may further correspond to a timing offset. The codepoint of the DCI may include the number of PUCCH repetitions, such that the number of PUCCH repetitions overwrites a previous number of PUCCH repetitions.

In some instances, one PUCCH resource set of the one or more PUCCH resource sets may be based on an uplink control information (UCI) size. The DCI may indicate the UCI size. Additionally, the at least one PRI may correspond to the selected one PUCCH resource set.

At1006, the base station may receive, from the UE, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions, as described in connection with the examples inFIGS.4,5,6A,6B,6C, and7. For example, base station704may receive, from the UE, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions, as described in connection with770inFIG.7. Further,1006may be performed by determination component1240inFIG.12.

FIG.11is a diagram1100illustrating an example of a hardware implementation for an apparatus1102. The apparatus1102is a UE and includes a cellular baseband processor1104(also referred to as a modem) coupled to a cellular RF transceiver1122and one or more subscriber identity modules (SIM) cards1120, an application processor1106coupled to a secure digital (SD) card1108and a screen1110, a Bluetooth module1112, a wireless local area network (WLAN) module1114, a Global Positioning System (GPS) module1116, and a power supply1118. The cellular baseband processor1104communicates through the cellular RF transceiver1122with the UE104and/or BS102/180. The cellular baseband processor1104may include a computer-readable medium/memory. The computer-readable medium/memory may be non-transitory. The cellular baseband processor1104is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the cellular baseband processor1104, causes the cellular baseband processor1104to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the cellular baseband processor1104when executing software. The cellular baseband processor1104further includes a reception component1130, a communication manager1132, and a transmission component1134. The communication manager1132includes the one or more illustrated components. The components within the communication manager1132may be stored in the computer-readable medium/memory and/or configured as hardware within the cellular baseband processor1104. The cellular baseband processor1104may be a component of the UE350and may include the memory360and/or at least one of the TX processor368, the RX processor356, and the controller/processor359. In one configuration, the apparatus1102may be a modem chip and include just the baseband processor1104, and in another configuration, the apparatus1102may be the entire UE (e.g., see350ofFIG.3) and include the aforediscussed additional modules of the apparatus1102.

The communication manager1132includes a determination component1140that is configured to receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, e.g., as described in connection with step902above. Determination component1140may also be configured to receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, e.g., as described in connection with step904above. Determination component1140may also be configured to select one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size, e.g., as described in connection with step906above. Determination component1140may also be configured to transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions, e.g., as described in connection with step908above.

In one configuration, the apparatus1102, and in particular the cellular baseband processor1104, includes means for receiving, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions; means for receiving, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions; means for selecting one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size; and means for transmitting, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions. The aforementioned means may be one or more of the aforementioned components of the apparatus1102configured to perform the functions recited by the aforementioned means. As described supra, the apparatus1102may include the TX Processor368, the RX Processor356, and the controller/processor359. As such, in one configuration, the aforementioned means may be the TX Processor368, the RX Processor356, and the controller/processor359configured to perform the functions recited by the aforementioned means.

FIG.12is a diagram1200illustrating an example of a hardware implementation for an apparatus1202. The apparatus1202is a base station and includes a baseband unit1204. The baseband unit1204may communicate through a cellular RF transceiver with the UE104. The baseband unit1204may include a computer-readable medium/memory. The baseband unit1204is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the baseband unit1204, causes the baseband unit1204to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the baseband unit1204when executing software. The baseband unit1204further includes a reception component1230, a communication manager1232, and a transmission component1234. The communication manager1232includes the one or more illustrated components. The components within the communication manager1232may be stored in the computer-readable medium/memory and/or configured as hardware within the baseband unit1204. The baseband unit1204may be a component of the BS310and may include the memory376and/or at least one of the TX processor316, the RX processor370, and the controller/processor375.

The communication manager1232includes a determination component1240that is configured to transmit, to a user equipment (UE), a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions, e.g., as described in connection with step1002above. Determination component1240may also be configured to transmit, to the UE, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions, e.g., as described in connection with step1004above. Determination component1240may also be configured to receive, from the UE, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions, e.g., as described in connection with step1006above.

In one configuration, the apparatus1202, and in particular the baseband unit1204, includes means for transmitting, to a user equipment (UE), a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions; means for transmitting, to the UE, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions; and means for receiving, from the UE, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions. The aforementioned means may be one or more of the aforementioned components of the apparatus1202configured to perform the functions recited by the aforementioned means. As described supra, the apparatus1202may include the TX Processor316, the RX Processor370, and the controller/processor375. As such, in one configuration, the aforementioned means may be the TX Processor316, the RX Processor370, and the controller/processor375configured to perform the functions recited by the aforementioned means.

Aspect 1 is an apparatus for wireless communication at a UE including at least one processor coupled to a memory and configured to: receive, from a base station, a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions; receive, from the base station, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions; and transmit, to the base station, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the transmitted PUCCH corresponding to the number of PUCCH repetitions.

Aspect 2 is the apparatus of aspect 1, where the codepoint of the DCI includes at least one K1 value, and the at least one K1 value corresponds to the number of PUCCH repetitions.

Aspect 3 is the apparatus of any of aspects 1 and 2, where the at least one K1 value further corresponds to a timing offset.

Aspect 4 is the apparatus of any of aspects 1 to 3, where the codepoint of the DCI includes the number of PUCCH repetitions, such that the number of PUCCH repetitions overwrites a previous number of PUCCH repetitions.

Aspect 5 is the apparatus of any of aspects 1 to 4, where the number of PUCCH repetitions is at least one of an overall repetition number, an actual repetition number, or a scaled value of the number of PUCCH repetitions configured based on a PUCCH format or the PUCCH resource.

Aspect 6 is the apparatus of any of aspects 1 to 5, where the number of PUCCH repetitions is the overall repetition number, and the overall repetition number corresponds to a number of PUCCH repetitions for spatial relation information1and a number of PUCCH repetitions for spatial relation information2.

Aspect 7 is the apparatus of any of aspects 1 to 6, where the number of PUCCH repetitions is the actual repetition number, and the actual repetition number applies to a number of PUCCH repetitions for spatial relation information1or a number of PUCCH repetitions for spatial relation information2.

Aspect 8 is the apparatus of any of aspects 1 to 7, where the number of PUCCH repetitions is the scaled value of the number of PUCCH repetitions, and the scaled value of the number of PUCCH repetitions is one half of the number of PUCCH repetitions or twice of the number of PUCCH repetitions.

Aspect 9 is the apparatus of any of aspects 1 to 8, where the at least one processor is further configured to: select one PUCCH resource set of the one or more PUCCH resource sets based on an uplink control information (UCI) size.

Aspect 10 is the apparatus of any of aspects 1 to 9, where the DCI indicates the UCI size.

Aspect 11 is the apparatus of any of aspects 1 to 10, where the at least one PRI corresponds to the selected one PUCCH resource set.

Aspect 12 is the apparatus of any of aspects 1 to 11, where the indication corresponds to a resource list.

Aspect 13 is the apparatus of any of aspects 1 to 12, further including a transceiver or an antenna coupled to the at least one processor.

Aspect 14 is a method of wireless communication for implementing any of aspects 1 to 13.

Aspect 15 is an apparatus for wireless communication including means for implementing any of aspects 1 to 13.

Aspect 17 is an apparatus for wireless communication at a base station including at least one processor coupled to a memory and configured to: transmit, to a user equipment (UE), a radio resource control (RRC) message including an indication of a number of physical uplink control channel (PUCCH) repetitions; transmit, to the UE, downlink control information (DCI) indicating a codepoint associated with the number of PUCCH repetitions, the codepoint including at least one PUCCH resource indicator (PRI) associated with a PUCCH resource of one or more PUCCH resource sets, the at least one PRI corresponding to the number of PUCCH repetitions; and receive, from the UE, a PUCCH via the PUCCH resource of the one or more PUCCH resource sets, the received PUCCH corresponding to the number of PUCCH repetitions.

Aspect 18 is the apparatus of aspect 17, where the codepoint of the DCI includes at least one K1 value, and the at least one K1 value corresponds to the number of PUCCH repetitions.

Aspect 19 is the apparatus of any of aspects 17 and 18, where the at least one K1 value further corresponds to a timing offset.

Aspect 20 is the apparatus of any of aspects 17 to 19, where the codepoint of the DCI includes the number of PUCCH repetitions, such that the number of PUCCH repetitions overwrites a previous number of PUCCH repetitions.

Aspect 21 is the apparatus of any of aspects 17 to 20, where the number of PUCCH repetitions is at least one of an overall repetition number, an actual repetition number, or a scaled value of the number of PUCCH repetitions configured based on a PUCCH format or the PUCCH resource.

Aspect 22 is the apparatus of any of aspects 17 to 21, where the number of PUCCH repetitions is the overall repetition number, and the overall repetition number corresponds to a number of PUCCH repetitions for spatial relation information1and a number of PUCCH repetitions for spatial relation information2.

Aspect 23 is the apparatus of any of aspects 17 to 22, where the number of PUCCH repetitions is the actual repetition number, and the actual repetition number applies to a number of PUCCH repetitions for spatial relation information1or a number of PUCCH repetitions for spatial relation information2.

Aspect 24 is the apparatus of any of aspects 17 to 23, where the number of PUCCH repetitions is the scaled value of the number of PUCCH repetitions, and the scaled value of the number of PUCCH repetitions is one half of the number of PUCCH repetitions or twice of the number of PUCCH repetitions.

Aspect 25 is the apparatus of any of aspects 17 to 24, where one PUCCH resource set of the one or more PUCCH resource sets is based on an uplink control information (UCI) size.

Aspect 26 is the apparatus of any of aspects 17 to 25, where the DCI indicates the UCI size.

Aspect 27 is the apparatus of any of aspects 17 to 26, where the at least one PRI corresponds to the one PUCCH resource set.

Aspect 28 is the apparatus of any of aspects 17 to 27, where the indication corresponds to a resource list.

Aspect 29 is the apparatus of any of aspects 17 to 28, further including a transceiver or an antenna coupled to the at least one processor.

Aspect 30 is a method of wireless communication for implementing any of aspects 17 to 29.

Aspect 31 is an apparatus for wireless communication including means for implementing any of aspects 17 to 29.

Aspect 32 is a computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement any of aspects 17 to 29.