Patent Publication Number: US-2023135803-A1

Title: Management of uplink signal transmission repetitions in a user equipment (ue) configured with one or more portions of a frequency band

Description:
BACKGROUND 
     Technical Field 
     The present disclosure relates generally to communication systems, and more particularly, to management of uplink signal transmission repetitions in a user equipment (UE) configured with one or more portions of a frequency band. 
     Introduction 
     Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems. 
     These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. 
     SUMMARY 
     The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. 
     The aspects described herein may enable an apparatus (e.g., a UE) allocated with a portion of a frequency band (e.g., a flexible bandwidth part) to transmit a number of repetitions of an uplink signal transmission when an amount of uplink resources in the portion of the frequency band are insufficient. For example, the portion of the frequency band may be a flexible bandwidth part and a slot format may be associated with the flexible bandwidth part. The slot format may designate uplink slots and/or downlink slots for the flexible bandwidth part. 
     In some scenarios, the apparatus may determine to transmit a number of repetitions of an uplink signal transmission in the flexible bandwidth part, but the slot format associated with the flexible bandwidth part may not include a sufficient number of uplink slots to enable the apparatus to transmit the number of repetitions of the uplink signal transmission. In these scenarios, the apparatus may apply the aspects described herein to transmit the number of repetitions of the uplink signal transmission. 
     In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus receives a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band. The apparatus transmits a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on the first slot format when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format. 
     In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus receives a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band. The apparatus transmits a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on a third slot format associated with the at least one portion of the frequency band when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on either of the first slot format and the second slot format. 
     In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus receives a resource allocation in a frequency band, the resource allocation including a plurality of portions of the frequency band, wherein each of plurality of portions of the frequency band is associated with a different slot format. The apparatus transmits a number of repetitions of an uplink signal transmission using at least a first portion and a second portion of the frequency band included in the plurality of portions of the frequency band, wherein a first portion of the number of repetitions of the uplink signal transmission is transmitted in the first portion of the frequency band and a second portion of the number of repetitions of the uplink signal transmission is transmitted in the second portion of the frequency band. 
     To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a diagram illustrating an example of a wireless communications system and an access network. 
         FIGS.  2 A,  2 B,  2 C, and  2 D  are diagrams illustrating examples of a first 5G/NR frame, DL channels within a 5G/NR subframe, a second 5G/NR frame, and UL channels within a 5G/NR subframe, respectively. 
         FIG.  3    is a diagram illustrating an example of a base station and user equipment (UE) in an access network. 
         FIG.  4    illustrates a first example allocation of time-frequency resources for the In-Band Full Duplex (IBFD) mode. 
         FIG.  5    illustrates a second example allocation of time-frequency resources for the IBFD mode. 
         FIG.  6    illustrates an example allocation of time frequency resources for the sub-band frequency division duplex (FDD) mode. 
         FIG.  7    illustrates an example of multiple flexible bandwidth parts of a carrier bandwidth including a first flexible BWP and a second flexible BWP. 
         FIG.  8    illustrates a signal flow diagram in accordance with various aspects of the disclosure. 
         FIGS.  9 A and  9 B  illustrate a portion of a frequency band allocated to a UE and a number of slots associated with the portion of the frequency band. 
         FIGS.  10 A and  10 B  illustrate a portion of a frequency band allocated to a UE and a number of slots associated with the portion of the frequency band. 
         FIG.  11    illustrates a signal flow diagram in accordance with various aspects of the disclosure. 
         FIG.  12    illustrates first and second portions of a frequency band allocated to a UE, a first number of slots associated with the first portion of the frequency band, and a second number of slots associated with the second portion of the frequency ban. 
         FIG.  13    is a flowchart of a method of wireless communication. 
         FIG.  14    is a flowchart of a method of wireless communication. 
         FIG.  15    is a flowchart of a method of wireless communication. 
         FIG.  16    is a conceptual data flow diagram illustrating the data flow between different means/components in an example apparatus. 
         FIG.  17    is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system. 
     
    
    
     DETAILED DESCRIPTION 
     The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts. 
     Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements”). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. 
     By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoC), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. 
     Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer. 
       FIG.  1    is a diagram illustrating an example of a wireless communications system and an access network  100 . The wireless communications system (also referred to as a wireless wide area network (WWAN)) includes base stations  102 , UEs  104 , an Evolved Packet Core (EPC)  160 , and another core network  190  (e.g., a 5G Core (5GC)). The base stations  102  may include macrocells (high power cellular base station) and/or small cells (low power cellular base station). The macrocells include base stations. The small cells include femtocells, picocells, and microcells. 
     The base stations  102  configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC  160  through backhaul links  132  (e.g., 51 interface). The base stations  102  configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network  190  through backhaul links  184 . In addition to other functions, the base stations  102  may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations  102  may communicate directly or indirectly (e.g., through the EPC  160  or core network  190 ) with each other over backhaul links  134  (e.g., X2 interface). The backhaul links  134  may be wired or wireless. 
     The base stations  102  may wirelessly communicate with the UEs  104 . Each of the base stations  102  may provide communication coverage for a respective geographic coverage area  110 . There may be overlapping geographic coverage areas  110 . For example, the small cell  102 ′ may have a coverage area  110 ′ that overlaps the coverage area  110  of one or more macro base stations  102 . A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG). The communication links  120  between the base stations  102  and the UEs  104  may include uplink (UL) (also referred to as reverse link) transmissions from a UE  104  to a base station  102  and/or downlink (DL) (also referred to as forward link) transmissions from a base station  102  to a UE  104 . The communication links  120  may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity. The communication links may be through one or more carriers. The base stations  102 /UEs  104  may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell). 
     Certain UEs  104  may communicate with each other using device-to-device (D2D) communication link  158 . The D2D communication link  158  may use the DL/UL WWAN spectrum. The D2D communication link  158  may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be through a variety of wireless D2D communications systems, such as for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR. 
     The wireless communications system may further include a Wi-Fi access point (AP)  150  in communication with Wi-Fi stations (STAs)  152  via communication links  154  in a 5 GHz unlicensed frequency spectrum. When communicating in an unlicensed frequency spectrum, the STAs  152 /AP  150  may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available. 
     The small cell  102 ′ may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell  102 ′ may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP  150 . The small cell  102 ′, employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network. 
     A base station  102 , whether a small cell  102 ′ or a large cell (e.g., macro base station), may include an eNB, gNodeB (gNB), or another type of base station. Some base stations, such as gNB  180  may operate in a traditional sub 6 GHz spectrum, in millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with the UE  104 . When the gNB  180  operates in mmW or near mmW frequencies, the gNB  180  may be referred to as an mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW/near mmW radio frequency band (e.g., 3 GHz-300 GHz) has extremely high path loss and a short range. The mmW base station  180  may utilize beamforming  182  with the UE  104  to compensate for the extremely high path loss and short range. 
     The base station  180  may transmit a beamformed signal to the UE  104  in one or more transmit directions  182 ′. The UE  104  may receive the beamformed signal from the base station  180  in one or more receive directions  182 ″. The UE  104  may also transmit a beamformed signal to the base station  180  in one or more transmit directions. The base station  180  may receive the beamformed signal from the UE  104  in one or more receive directions. The base station  180 /UE  104  may perform beam training to determine the best receive and transmit directions for each of the base station  180 /UE  104 . The transmit and receive directions for the base station  180  may or may not be the same. The transmit and receive directions for the UE  104  may or may not be the same. 
     The EPC  160  may include a Mobility Management Entity (MME)  162 , other MMEs  164 , a Serving Gateway  166 , a Multimedia Broadcast Multicast Service (MBMS) Gateway  168 , a Broadcast Multicast Service Center (BM-SC)  170 , and a Packet Data Network (PDN) Gateway  172 . The MME  162  may be in communication with a Home Subscriber Server (HSS)  174 . The MME  162  is the control node that processes the signaling between the UEs  104  and the EPC  160 . Generally, the MME  162  provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway  166 , which itself is connected to the PDN Gateway  172 . The PDN Gateway  172  provides UE IP address allocation as well as other functions. The PDN Gateway  172  and the BM-SC  170  are connected to the IP Services  176 . The IP Services  176  may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services. The BM-SC  170  may provide functions for MBMS user service provisioning and delivery. The BM-SC  170  may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway  168  may be used to distribute MBMS traffic to the base stations  102  belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information. 
     The core network  190  may include a Access and Mobility Management Function (AMF)  192 , other AMFs  193 , a Session Management Function (SMF)  194 , and a User Plane Function (UPF)  195 . The AMF  192  may be in communication with a Unified Data Management (UDM)  196 . The AMF  192  is the control node that processes the signaling between the UEs  104  and the core network  190 . Generally, the AMF  192  provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF  195 . The UPF  195  provides UE IP address allocation as well as other functions. The UPF  195  is connected to the IP Services  197 . The IP Services  197  may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services. 
     The base station may also be referred to as a gNB, Node B, evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit reception point (TRP), or some other suitable terminology. The base station  102  provides an access point to the EPC  160  or core network  190  for a UE  104 . Examples of UEs  104  include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device. Some of the UEs  104  may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc.). The UE  104  may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. 
     Referring again to  FIG.  1   , in certain aspects, the UE  104  may be configured to transmit repetitions of an uplink signal transmission in a portion of a frequency band based on a slot format associated with the frequency band when the repetitions cannot be transmitted based on a slot format associated with the portion of the frequency band ( 198 ). Although the following description may be focused on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies. 
       FIG.  2 A  is a diagram  200  illustrating an example of a first subframe within a 5G/NR frame structure.  FIG.  2 B  is a diagram  230  illustrating an example of DL channels within a 5G/NR subframe.  FIG.  2 C  is a diagram  250  illustrating an example of a second subframe within a 5G/NR frame structure.  FIG.  2 D  is a diagram  280  illustrating an example of UL channels within a 5G/NR subframe. The 5G/NR frame structure may be FDD in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for either DL or UL, or may be TDD in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by  FIGS.  2 A,  2 C , the 5G/NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL), where D is DL, U is UL, and X is flexible for use between DL/UL, and subframe 3 being configured with slot format 34 (with mostly UL). While subframes 3, 4 are shown with slot formats 34, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI), or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI). Note that the description infra applies also to a 5G/NR frame structure that is TDD. 
     Other wireless communication technologies may have a different frame structure and/or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission). The number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies μ 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology μ, there are 14 symbols/slot and 2 μ  slots/subframe. The subcarrier spacing and symbol length/duration are a function of the numerology. The subcarrier spacing may be equal to 2 μ *15 kHz, where μ is the numerology 0 to 5. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=5 has a subcarrier spacing of 480 kHz. The symbol length/duration is inversely related to the subcarrier spacing.  FIGS.  2 A- 2 D  provide an example of slot configuration 0 with 14 symbols per slot and numerology μ=0 with 1 slot per subframe. The subcarrier spacing is 15 kHz and symbol duration is approximately 66.7 μs. 
     A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs)) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme. 
     As illustrated in  FIG.  2 A , some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include demodulation RS (DM-RS) (indicated as R x  for one particular configuration, where  100   x  is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS). 
       FIG.  2 B  illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including nine RE groups (REGs), each REG including four consecutive REs in an OFDM symbol. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE  104  to determine subframe/symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DM-RS. The physical broadcast channel (PBCH), which carries a master information block (MIB), may be logically grouped with the PSS and SSS to form a synchronization signal (SS)/PBCH block. The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs), and paging messages. 
     As illustrated in  FIG.  2 C , some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. Although not shown, the UE may transmit sounding reference signals (SRS). The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL. 
       FIG.  2 D  illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and HARQ ACK/NACK feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and/or UCI. 
       FIG.  3    is a block diagram of a base station  310  in communication with a UE  350  in an access network. In the DL, IP packets from the EPC  160  may be provided to a controller/processor  375 . The controller/processor  375  implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller/processor  375  provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression/decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization. 
     The transmit (TX) processor  316  and the receive (RX) processor  370  implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing. The TX processor  316  handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator  374  may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE  350 . Each spatial stream may then be provided to a different antenna  320  via a separate transmitter  318 TX. Each transmitter  318 TX may modulate an RF carrier with a respective spatial stream for transmission. 
     At the UE  350 , each receiver  354 RX receives a signal through its respective antenna  352 . Each receiver  354 RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor  356 . The TX processor  368  and the RX processor  356  implement layer 1 functionality associated with various signal processing functions. The RX processor  356  may perform spatial processing on the information to recover any spatial streams destined for the UE  350 . If multiple spatial streams are destined for the UE  350 , they may be combined by the RX processor  356  into a single OFDM symbol stream. The RX processor  356  then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT). The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station  310 . These soft decisions may be based on channel estimates computed by the channel estimator  358 . The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station  310  on the physical channel The data and control signals are then provided to the controller/processor  359 , which implements layer 3 and layer 2 functionality. 
     The controller/processor  359  can be associated with a memory  360  that stores program codes and data. The memory  360  may be referred to as a computer-readable medium. In the UL, the controller/processor  359  provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC  160 . The controller/processor  359  is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations. 
     Similar to the functionality described in connection with the DL transmission by the base station  310 , the controller/processor  359  provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression/decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization. 
     Channel estimates derived by a channel estimator  358  from a reference signal or feedback transmitted by the base station  310  may be used by the TX processor  368  to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor  368  may be provided to different antenna  352  via separate transmitters  354 TX. Each transmitter  354 TX may modulate an RF carrier with a respective spatial stream for transmission. 
     The UL transmission is processed at the base station  310  in a manner similar to that described in connection with the receiver function at the UE  350 . Each receiver  318 RX receives a signal through its respective antenna  320 . Each receiver  318 RX recovers information modulated onto an RF carrier and provides the information to a RX processor  370 . 
     The controller/processor  375  can be associated with a memory  376  that stores program codes and data. The memory  376  may be referred to as a computer-readable medium. In the UL, the controller/processor  375  provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE  350 . IP packets from the controller/processor  375  may be provided to the EPC  160 . The controller/processor  375  is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations. 
     At least one of the TX processor  368 , the RX processor  356 , and the controller/processor  359  may be configured to perform aspects in connection with  198  of  FIG.  1   . 
     As described herein, a base station and a UE may communicate in a wireless communication network, such as a 5G NR network, using one or more carriers (also referred to as radio frequency (RF) carriers). Each carrier may have a certain bandwidth (also referred to as a carrier bandwidth or a cell bandwidth). In one example, a carrier may have a bandwidth of 100 MHz. 
     A base station and a UE may communicate in a full-duplex mode, which enables a UE to simultaneously transmit and receive over the bandwidth of the carrier. In a first type of full-duplex mode (also referred to as In-Band Full Duplex (IBFD) mode), a UE may simultaneously transmit and receive using the same time-frequency resources. In a second type of full-duplex mode (also referred to as Sub-band frequency division duplex (FDD) mode or flexible duplex mode), a UE may transmit and receive at the same time but on different frequency resources. The time-frequency resources allocated for UL transmissions may fully or partially overlap with time-frequency resources allocated for DL transmissions. Examples of time-frequency resource allocations for the first and second types of full-duplex modes will now be described with reference to  FIGS.  4 - 6   . 
       FIG.  4    illustrates a first example allocation of time-frequency resources for the IBFD mode. Time resources (e.g., time period  404 ) and frequency resources (e.g., carrier bandwidth  402 ) may be allocated for downlink transmissions from a base station and uplink transmissions from a UE to enable full-duplex communication. In  FIG.  4   , the uplink resource allocation  408  is shown as a shaded region and the downlink resource allocation  406  is shown as an unshaded region. In the example of  FIG.  4   , it should be noted that the same time resources (e.g., time period  410  from t 0  to t 1 ) and the same frequency resources (e.g., frequency band  412 ) are included in both the downlink resource allocation  406  and the uplink resource allocation  408 . Therefore, in the IBFD mode, the same time-frequency resources are shared in the downlink resource allocation  406  and the uplink resource allocation  408 . 
       FIG.  5    illustrates a second example allocation of time-frequency resources for the IBFD mode. Time resources (e.g., time period  504 ) and frequency resources (e.g., carrier bandwidth  502 ) may be allocated for downlink transmissions from a base station and uplink transmissions from a UE to enable full-duplex communication. In  FIG.  5   , the uplink resource allocation  508  is shown as a shaded region and the downlink resource allocation  506  is shown as an unshaded region. In the example of  FIG.  5   , it should be noted that the same time resources (e.g., time period  510  from t 0  to t 1 ) and the same frequency resources (e.g., frequency band  512 ) are included in both the downlink resource allocation  506  and the uplink resource allocation  508 . Therefore, in the IBFD mode, the same time-frequency resources are shared in the downlink resource allocation  506  and the uplink resource allocation  508 . 
       FIG.  6    illustrates an example allocation of time frequency resources for the sub-band FDD mode. Time resources (e.g., time period  604 ) and frequency resources (e.g., carrier bandwidth  602 ) may be allocated for downlink transmissions from a base station and uplink transmissions from a UE to enable full-duplex communication. In  FIG.  6   , the uplink resource allocation  608  is shown as a shaded region and the downlink resource allocation  606  is shown as an unshaded region. In the example of  FIG.  6   , it should be noted that different frequency resources may be simultaneously used for the downlink transmissions and the uplink transmissions. For example, the downlink resource allocation  606  may include a first frequency band  612  and the uplink resource allocation  608  may include a second frequency band  614 . A guard band  610  (shown as a cross-hatched region in  FIG.  6   ) may be used to separate the downlink resource allocation  606  from the uplink resource allocation  608  in the frequency domain 
     In some cases, a UE may be allowed to operate (e.g., transmit and/or receive) within a bandwidth that is more narrow than the full bandwidth of a carrier. Accordingly, a UE may be configured with one or more bandwidth parts (BWPs) that are smaller than the full bandwidth of the carrier. In one example, a carrier may have a bandwidth of 100 MHz and a BWP allocated to the UE may have a bandwidth of 20 MHz. 
     In some examples, a BWP may be configured with a specific TDD pattern of uplink resources and/or downlink resources. A BWP configured with a specific TDD pattern may be referred to as a flexible BWP. For example, a flexible BWP may be associated with a specific slot format that may allow DL and UL transmissions at different times. In some implementations, a flexible BWP may enable full-duplex communication and may provide flexibility with respect to network assignment and concurrent handling of half-duplex UEs, full-duplex aware UEs, and full-duplex UEs. 
     A UE may repeat an uplink signal transmission multiple times (also referred to as PUSCH repetition) to enable successful reception at a receiver (e.g., a base station). When a UE is configured with a flexible BWP, the ability of a UE to transmit a certain number of repetitions of an uplink signal transmission may depend on the availability of UL resources in the flexible BWP. In some scenarios, if the active BWP of a UE is a flexible BWP that does not include adequate UL resources, the UE may not be able to transmit the number of repetitions of the uplink signal transmission. An example of such scenario is described with reference to  FIG.  7   . 
       FIG.  7    illustrates an example of multiple flexible BWPs of a carrier bandwidth  702  including a first flexible BWP (BWP1)  704  and a second flexible BWP (BWP2)  706 . It should be understood that the multiple flexible BWPs of the carrier bandwidth  702  may or may not be equal in terms of bandwidth. In  FIG.  7   , for example, the flexible BWP1  704  may include a larger portion of the carrier bandwidth  702  than the flexible BWP2  706 . 
     In one example, the flexible BWP1  704  and the flexible BWP2  706  may each include four slots, such as the slots  708 ,  710 ,  712 ,  714  in the flexible BWP1  704  and the slots  718 ,  720 ,  722 ,  724  in the flexible BWP2  706 . Each of the slots  708 ,  710 ,  712 ,  714  in the flexible BWP1  704  may have a first slot duration  716  and each of the slots  718 ,  720 ,  722 ,  724  in the flexible BWP2  706  may have a second slot duration  726 . In some examples, the first slot duration  716  may or may not be equal to the second slot duration  726 . 
     In  FIG.  7   , the example slot format associated with the flexible BWP1  704  includes three consecutive downlink slots (e.g., at slots  708 ,  710 ,  712 ) followed by an uplink slot (e.g., at slot  714 ). The example slot format associated with the flexible BWP2  706  includes two consecutive downlink slots (e.g., at slots  718 ,  720 ) followed by two consecutive uplink slots (e.g., at slots  722 ,  724 ). 
     More than one flexible BWP can be active at a time for a UE. In some examples, a UE may switch between flexible BWPs. For example, with reference to  FIG.  7   , a UE at time t 2  may switch  728  from the flexible BWP1  704  to the flexible BWP2  706 . In some examples, a UE may switch between legacy BWPs (e.g., non-flexible BWPs). 
     A UE may apply all or a portion of a slot format associated with a flexible BWP or may ignore the slot format associated with a flexible BWP. In some of the aspects described herein, a UE may switch between flexible BWPs having different slot formats, may fall back to an underlying slot format, and/or may operate between multiple flexible BWPs to enable higher efficiency for repetitions of uplink signal transmissions (e.g., PUSCH repetitions). The aspects described herein define techniques for handling repetitions of uplink signal transmissions at a UE configured with one or more flexible BWPs. 
       FIG.  8    illustrates a signal flow diagram  800  in accordance with various aspects of the disclosure. The signal flow diagram  800  includes a UE  802  and a base station  804 . As shown in  FIG.  8   , the UE  802  receives a resource allocation  806  from the base station  804 . The resource allocation  806  may include one or more portions of a frequency band, such as one or more flexible BWPs. In some examples, the frequency band may be a bandwidth of a carrier. In some examples, each of the one or more portions of the frequency band may be associated with a different slot format. In some examples, the frequency band may be associated with its own slot format (also referred to as an underlying slot format of the frequency band). 
     In some aspects of the disclosure, the UE  802  may optionally receive a repetition control message  807  from the base station  804 . In some examples, the repetition control message  807  may identify frequency resources (e.g., a certain flexible BWP) of the at least one portion of the frequency band that the UE  802  should use for transmitting repetitions of an uplink signal transmission. In some examples, the repetition control message  807  may identify frequency resources (e.g., a certain flexible BWP) of the at least one portion of the frequency band the UE  802  should use for transmitting repetitions of an uplink signal transmission and a slot format (e.g., a TDD pattern) that the UE  802  should apply to the frequency resources. 
     At  808 , the UE  802  determines a number of repetitions of an uplink signal transmission to be transmitted in a portion of the frequency band (e.g., a flexible BWP) allocated to the UE  802 . In the examples described herein, the number of repetitions may be expressed as a value of N, where N represents a positive integer greater than or equal to two. The number of repetitions (e.g., N) may include an initial transmission of an uplink signal transmission from the UE  802  (also referred to as a first repetition of the uplink signal transmission) and subsequent transmissions of that same uplink signal transmission from the UE  802 . In one example, the UE  802  may determine that three repetitions of an uplink signal transmission (e.g., N=3) are to be transmitted in the portion of the frequency band. 
     At  810 , the UE  802  determines that the number of repetitions of the uplink signal transmission cannot be transmitted in the portion of the frequency band based on a slot format associated with the portion of the frequency band. For example, the UE  802  may determine that the number of uplink slots in the slot format associated with the portion of the frequency band may be less than the number of repetitions of the uplink signal transmission (e.g., the number of uplink slots in the slot format associated with the portion of the frequency band is less than N). 
     At  812 , the UE  802  determines a different slot format for the portion of the frequency band which enables transmission of the number of repetitions of the uplink signal transmission. The UE  802  then transmits the number of repetitions of the uplink signal transmission in the portion of the frequency band using the different slot format. For example, the UE  802  may transmit the first repetition of an uplink signal  814  through the Nth repetition of uplink signal  816 . In some scenarios, if a different slot format which enables transmission of the number of repetitions of the uplink signal transmission is not available (e.g., no slot formats include a sufficient number of uplink slots), the UE  802  may determine a slot format with the most uplink slots and may drop repetitions in slots designated as downlink slots. 
     A first example scenario for the operations  810  and  812  in  FIG.  8    will now be described with reference to  FIGS.  9 A and  9 B .  FIGS.  9 A and  9 B  illustrate a portion of a frequency band allocated to the UE  802  and a number of slots associated with the portion of the frequency band. For example, the frequency band may be the carrier bandwidth  902  and the portion of the frequency band may be the flexible bandwidth part (BWP)  904 . A first slot format  906  (e.g., an underlying slot format) may be associated with the carrier bandwidth  902  and a second slot format  950  may be associated with the flexible BWP  904 . 
     The first slot format  906  may designate eight slots (e.g., slots  908 ,  910 ,  912 ,  914 ,  916 ,  918 ,  920 , and  922 ) as downlink slots and three slots (e.g., slots  924 ,  926 ,  928 ) as uplink slots. The second slot format  950  may designate seven slots (e.g., slots  932 ,  934 ,  936 ,  938 ,  940 ,  942 , and  944 ) as downlink slots and one slot (e.g., slot  946 ) as an uplink slot. Each of the slots  908  through  928  may have a first slot duration  930  and each of the slots  932  through  946  may have a second slot duration  948 . In the example of  FIG.  9 A , the first and second slot durations  930 ,  948  may be equal. 
     If the UE  802  has determined that three repetitions (e.g., N=3) of an uplink signal transmission are to be transmitted in the portion of the frequency band (e.g., in the flexible BWP  904 ), three uplink slots may be needed in the portion of the frequency band. If the number of uplink slots in the second slot format  950  is less than the number of repetitions of the uplink signal transmission, the UE  802  may determine that the three repetitions of the uplink signal transmission cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  904 ). Since the second slot format  950  associated with the flexible BWP  904  designates one slot (e.g., slot  946 ) as an uplink slot, the UE  802  may determine that three repetitions of an uplink signal transmission cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  904 ) based on the second slot format  950 . 
     If the number of uplink slots in the first slot format  906  is greater than or equal to the number of repetitions of the uplink signal transmission, the UE  802  may apply the first slot format  906  to the portion of the frequency band (e.g., in the flexible BWP  904 ) instead of the second slot format  950 . Since the first slot format  906  shown in  FIG.  9 A  associated with the carrier bandwidth  902  includes three uplink slots (e.g., at slots  924 ,  926 ,  928 ), the UE  802  may apply the first slot format  906  to the portion of the frequency band (e.g., in the flexible BWP  904 ). This may change slots  942 ,  944 ,  946  to uplink slots as shown in  FIG.  9 B . 
     The UE  802  may use the slots  942 ,  944 ,  946  to transmit the three repetitions of the uplink signal transmission. In some examples, the UE  802  may transmit one repetition of the uplink signal transmission per slot. For example, as shown in  FIG.  9 B , the UE  802  may transmit a first repetition of the uplink signal transmission  952  in the slot  942 , a second repetition of the uplink signal transmission  954  in the slot  944 , and a third repetition of the uplink signal transmission  956  in the slot  946 . In some examples, the first repetition of the uplink signal transmission  952  may correspond to the first repetition of the uplink signal  814  in  FIG.  8   , and the third repetition of the uplink signal transmission  956  may correspond to the Nth repetition of the uplink signal  816  in  FIG.  8   . 
     A second example scenario for the operations  810  and  812  in  FIG.  8    will now be described with reference to  FIGS.  10 A and  10 B .  FIGS.  10 A and  10 B  illustrate a portion of a frequency band allocated to the UE  802  and a number of slots associated with the portion of the frequency band. For example, the frequency band may be the carrier bandwidth  1002  and the portion of the frequency band may be the flexible bandwidth part (BWP)  1004 . A first slot format  1006  (e.g., an underlying slot format) may be associated with the carrier bandwidth  1002  and a second slot format  1050  may be associated with the flexible BWP  1004 . In some aspects of the disclosure, one or more optional slot formats may be associated with the portion of the frequency band (e.g., the flexible BWP  1004 ), such as a first optional slot format (also referred to as optional slot format 1)  1052  and a second optional slot format (also referred to as optional slot format 2)  1053 . In other examples, a different number of optional slot formats with different arrangements of uplink and downlink slots than those shown in  FIGS.  10 A and  10 B  may be available to the UE  802 . 
     The first slot format  1006  may designate eight slots (e.g., slots  1008 ,  1010 ,  1012 ,  1014 ,  1016 ,  1018 ,  1020 , and  1022 ) as downlink slots and three slots (e.g., slots  1024 ,  1026 ,  1028 ) as uplink slots. The second slot format  1050  may designate seven slots (e.g., slots  1032 ,  1034 ,  1036 ,  1038 ,  1040 ,  1042 , and  1044 ) as downlink slots and one slot (e.g., slot  1046 ) as an uplink slot. Each of the slots  1008  through  1028  may have a first slot duration  1030  and each of the slots  1032  through  1046  may have a second slot duration  1048 . In the example of  FIG.  10 A , the first and second slot durations  1030 ,  1048  may be equal. 
     If the UE  802  has determined that four repetitions (e.g., N=4) of an uplink signal transmission are to be transmitted in the portion of the frequency band (e.g., in the flexible BWP  1004 ), at least four uplink slots may be needed in the portion of the frequency band. If the number of uplink slots in the second slot format  1050  is less than the number of repetitions of the uplink signal transmission, the UE  802  may determine that the four repetitions of the uplink signal transmission cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  1004 ). Since the second slot format  1050  associated with the flexible BWP  1004  designates one slot (e.g., slot  1046 ) as an uplink slot, the UE  802  may determine that four repetitions of an uplink signal transmission cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  1004 ) based on the second slot format  1050 . 
     If the number of uplink slots in the first slot format  1006  is greater than or equal to the number of repetitions of the uplink signal transmission, the UE  802  may apply the first slot format  1006  to the portion of the frequency band (e.g., in the flexible BWP  1004 ) instead of the second slot format  1050 . Since the first slot format  1006  shown in  FIG.  10 A  associated with the carrier bandwidth  1002  includes three uplink slots (e.g., at slots  1024 ,  1026 ,  1028 ), the UE  802  may determine that four repetitions of an uplink signal transmission cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  1004 ) based on the first slot format  1006 . 
     If the number of uplink slots in one of the optional slot formats associated with the portion of the frequency band (e.g., the flexible BWP  1004 ) is greater than or equal to the number of repetitions of the uplink signal transmission, the UE  802  may apply that optional slot format to the portion of the frequency band (e.g., the flexible BWP  1004 ). In some examples, one slot format may be active for the flexible BWP  1004  at a given time, such as the second slot format  1050 , the first optional slot format  1052 , or the second optional slot format  1053 . Since the second optional slot format  1053  includes four uplink slots, the UE  802  may apply the second optional slot format  1053  to the portion of the frequency band (e.g., in the flexible BWP  1004 ). This may change slots  1040 ,  1042 ,  1044 ,  1046  corresponding to the uplink slots in the second optional slot format  1053  to uplink slots as shown in  FIG.  10 B . 
     The UE  802  may use the slots  1040 ,  1042 ,  1044 ,  1046  to transmit the four repetitions of the uplink signal transmission. For example, as shown in  FIG.  10 B , the UE  802  may transmit a first repetition of the uplink signal transmission  1054  in the slot  1040 , a second repetition of the uplink signal transmission  1056  in the slot  1042 , a third repetition of the uplink signal transmission  1058  in the slot  1044 , and a fourth repetition of the uplink signal transmission  1060  in the slot  1046 . In some examples, the first repetition of the uplink signal transmission  1054  may correspond to the first repetition of the uplink signal  814  in  FIG.  8   , and the fourth repetition of the uplink signal transmission  1060  may correspond to the Nth repetition of the uplink signal  816  in  FIG.  8   . 
       FIG.  11    illustrates a signal flow diagram  1100  in accordance with various aspects of the disclosure. The signal flow diagram  1100  includes a UE  1102  and a base station  1104 . As shown in  FIG.  11   , the UE  1102  receives a resource allocation  1106  from the base station  1104 . The resource allocation  1106  may include multiple portions of a frequency band. For example, each of the multiple portions of a frequency band may be a flexible BWP. 
     In some aspects of the disclosure, the UE  1102  may optionally receive a repetition control message  1107  from the base station  1104 . In some examples, the repetition control message  1107  may identify at least first and second portions of the frequency band that the UE  1102  should use for transmitting repetitions of an uplink signal transmission. In some examples, the repetition control message  1107  may indicate a certain slot format (e.g., a TDD pattern) for each of the at least first and second portions of the frequency band. 
     In some examples, the repetition control message  1107  may indicate multiple portions of a frequency band the UE  1102  should use for transmitting repetitions of an uplink signal transmission. In further examples, the repetition control message  1107  may permit the UE  1102  to use the multiple portions of a frequency band for the repetitions of an uplink signal transmission or may prohibit the UE  1102  from using the multiple portions of the frequency band for the repetitions of an uplink signal transmission. 
     At  1108 , the UE  1102  determines a number of repetitions of an uplink signal transmission to be transmitted in the portion of the frequency band allocated to the UE  1102  for repetitions of an uplink signal transmission. In the examples described herein, the number of repetitions may be expressed as a value of N, where N represents a positive integer greater than or equal to two. The number of repetitions (e.g., N) may include an initial transmission of an uplink signal transmission from the UE  1102  (also referred to as a first repetition of the uplink signal transmission) and subsequent transmissions of that same uplink signal transmission from the UE  1102 . In one example, the UE  1102  may determine that three repetitions of an uplink signal transmission (e.g., N=3) are to be transmitted in the portion of the frequency band. 
     At  1110 , the UE  1102  determines that the number of repetitions of the uplink signal transmission cannot be transmitted in the portion of the frequency band based on a slot format associated with the portion of the frequency band. For example, the UE  1102  may determine that the number of uplink slots in the slot format associated with the portion of the frequency band may be less than the number of repetitions of the uplink signal transmission (e.g., the number of uplink slots in the slot format associated with the portion of the frequency band is less than N). 
     At  1112 , the UE  1102  determines to transmit the repetitions of the uplink signal transmission using multiple portions of the frequency band, where each of the multiple portions of the frequency band is associated with a different slot format. For example, the multiple portions of the frequency band and the different slot formats associated with the multiple portions of the frequency band may increase the likelihood that the UE  1102  will find an available uplink slot for each successive repetition of the uplink signal transmission. This may allow the UE  1102  to transmit the repetitions of the uplink signal transmission with low latency. 
     The UE  1102  then transmits the number of repetitions of the uplink signal transmission using the multiple portions of the frequency band. For example, the UE  1102  may transmit the first repetition of an uplink signal  1114  through the Nth repetition of uplink signal  1116 . 
     An example of the operations  1110  and  1112  in  FIG.  11    will now be described with reference to  FIG.  12   .  FIG.  12    illustrates first and second portions of a frequency band allocated to the UE  1102 , a first number of slots associated with the first portion of the frequency band, and a second number of slots associated with the second portion of the frequency band. For example, the frequency band may be the carrier bandwidth  1202 , the first portion of the frequency band may be the first flexible bandwidth part (BWP1)  1204 , and the second portion of the frequency band may be the second flexible bandwidth part (BWP2)  1206 . A first slot format  1210  may be associated with the flexible BWP1  1204  and a second slot format  1230  may be associated with the flexible BWP2  1206 . 
     The first slot format  1210  may designate seven slots (e.g., slots  1212 ,  1214 ,  1216 ,  1218 ,  1220 ,  1222 , and  1224 ) as downlink slots and one slot (e.g., slot  1226 ) as an uplink slot. The second slot format  1230  may designate six slots (e.g., slots  1232 ,  1234 ,  1236 ,  1238 ,  1240 , and  1246 ) as downlink slots and two slots (e.g., slots  1242 ,  1244 ) as uplink slots. Each of the slots  1212  through  1226  and slots  1232  through  1246  may have a slot duration  1248 . 
     In one example, if the UE  1102  has determined that three repetitions (e.g., N=3) of an uplink signal transmission are to be transmitted in the second portion of the frequency band (e.g., in the flexible BWP2  1206 ), three uplink slots may be needed in the second portion of the frequency band. If the number of uplink slots in the second slot format  1230  is less than the number of repetitions of the uplink signal transmission, the UE  1102  may determine that the three repetitions of the uplink signal transmission cannot be transmitted in the second portion of the frequency band (e.g., in the flexible BWP2  1206 ). Since the second slot format  1230  associated with the flexible BWP2  1206  designates two slots (e.g., slots  1242 ,  1244 ) as uplink slots, the UE  1102  may determine that three repetitions of an uplink signal transmission cannot be transmitted in the second portion of the frequency band (e.g., in the flexible BWP2  1206 ) based on the second slot format  1230 . 
     In some examples, if a current slot is designated as an uplink slot in the portion of the frequency band allocated for the transmission of the repetitions of the uplink signal, the UE  1102  may transmit a repetition of the uplink signal transmission in that current slot. If the current slot is not designated as an uplink slot (e.g., the current slot is designated as a downlink slot) in the portion of the frequency band allocated for the transmission of the repetitions of the uplink signal, the UE  1102  may determine whether the current slot in a different portion of the frequency band configured for the UE  1102  is designated as an uplink slot. If an uplink slot is designated, the UE  1102  may transmit a repetition of the uplink signal in the uplink slot of the different portion of the frequency band. 
     For example, with reference to  FIG.  12   , if the current slot is slot  1242  (e.g., an uplink slot), the UE  1102  may transmit a first repetition of the uplink signal  1250  in slot  1242 . Thereafter, the next slot (e.g., slot  1244 ) would represent the current slot. Since slot  1244  is also designated as an uplink slot, the UE  1102  may transmit a second repetition of the uplink signal  1252  in slot  1244 . When slot  1246  (e.g., a downlink slot) represents the current slot, the UE  1102  may not be able to transmit the third repetition of the uplink signal. In this case, the UE  1102  may determine that the current slot in the first portion of the frequency band (e.g., the flexible BWP1  1204 ), such as slot  1226 , is designated as an uplink slot. The UE  1102  may transmit the third repetition of the uplink signal  1254  in the first portion of the frequency band (e.g., the flexible BWP1  1204 ) at slot  1226 . 
     In some examples, the repetition control message  807 ,  1107  may indicate a portion of a frequency band the UE  802 ,  1102  should use for transmitting repetitions of an uplink signal transmission and a slot format (e.g., a TDD pattern) that the UE  807 ,  1102  should apply to the portion of a frequency band using a multi-bit indicator. In one example, the multi-bit indicator may include two bits. In this example, each unique combination of bit values of the multi-bit indicator may be mapped to a certain portion of a bandwidth (e.g., a certain flexible BWP) and a certain slot format, or other information. 
     In one example scenario, a first combination of bit values ‘00’ of the multi-bit indicator may indicate to the UE (e.g., UE  807 ,  1107 ) to apply a slot format associated with a frequency band for a portion of the frequency band allocated to the UE (e.g., instead of a slot format associated with the portion of the frequency band), a second combination of bit values ‘01’ of the multi-bit indicator may indicate to the UE to use a first portion of the frequency band and to apply a first slot format to the first portion of the frequency band, a third combination of bit values ‘10’ of the multi-bit indicator may indicate to the UE to use a second portion of the frequency band and to apply a second slot format to the second portion of the frequency band, and a fourth combination of bit values ‘11’ of the multi-bit indicator may indicate to the UE to use a third portion of the frequency band and to apply a third slot format to the third portion of the frequency band. 
       FIG.  13    is a flowchart  1300  of a method of wireless communication. The method may be performed by a UE (e.g., the UE  104 ,  802 ; the apparatus  1602 / 1602 ′; the processing system  1714 , which may include the memory  360  and which may be the entire UE  104 ,  802  or a component of the UE  104 ,  802 , such as the TX processor  368 , the RX processor  356 , and/or the controller/processor  359 ). It should be understood that operations indicated with dashed lines represent optional operations. 
     At  1302 , the UE receives a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band. For example, with reference to  FIG.  8   , the UE  802  may receive a resource allocation  806  from the base station  804 . The resource allocation  806  may include one or more portions of a frequency band, such as one or more flexible BWPs. 
     At  1304 , the UE receives a control message identifying frequency resources of the at least one portion of the frequency band to be used for repetitions of an uplink signal transmission. For example, with reference to  FIG.  8   , the UE  802  may receive a repetition control message  807  from the base station  804 . In some examples, the repetition control message  807  may indicate a certain flexible bandwidth part, such as the flexible BWP  904  in  FIGS.  9 A and  9 B , that the UE  802  should use for transmitting repetitions of an uplink signal transmission. 
     At  1306 , the UE transmits a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on the first slot format when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format. 
     In some examples, the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format when a number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. In some examples, the first slot format includes a first number of uplink slots and the second slot format includes a second number of uplink slots, wherein the first number of uplink slots exceeds the second number of uplink slots. In some examples, a first number of uplink slots in the first slot format is greater than or equal to the number of repetitions of the uplink signal transmission, and a second number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. 
     For example, with reference to  FIG.  8   , the UE  802  (e.g., at  808 ) may determine a number (e.g., N) of repetitions of an uplink signal transmission to be transmitted in the portion of the frequency band allocated to the UE  802 . The UE  802  (e.g., at  810 ) may determine that the number of repetitions of the uplink signal transmission cannot be transmitted in the portion of the frequency band based on a slot format associated with the portion of the frequency band. The UE  802  (e.g., at  812 ) may determine a different slot format for the portion of the frequency band which enables transmission of the number of repetitions of the uplink signal transmission. 
     For example, with reference to  FIGS.  9 A and  9 B , if the UE  802  has determined that three repetitions (e.g., N=3) of an uplink signal transmission are to be transmitted in the portion of the frequency band (e.g., in the flexible BWP  904 ), three uplink slots may be needed in the portion of the frequency band. Since the second slot format  950  (shown in  FIG.  9 A ) associated with the flexible BWP  904  designates one slot (e.g., slot  946 ) as an uplink slot, the UE  802  may determine that three repetitions of an uplink signal transmission cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  904 ) based on the second slot format  950 . Since the first slot format  906  (shown in  FIG.  9 A ) associated with the carrier bandwidth  902  includes three uplink slots (e.g., at slots  924 ,  926 ,  928 ), the UE  802  may apply the first slot format  906  to the portion of the frequency band (e.g., in the flexible BWP  904 ). This may change slots  942 ,  944 ,  946  to uplink slots as shown in  FIG.  9 B . The UE  802  may use the slots  942 ,  944 ,  946  to transmit the three repetitions of the uplink signal transmission. 
     At  1308 , the UE optionally applies the first slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. 
     At  1310 , the UE optionally applies the second slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. 
       FIG.  14    is a flowchart  1400  of a method of wireless communication. The method may be performed by a UE (e.g., the UE  104 ,  802 ; the apparatus  1602 / 1602 ′; the processing system  1714 , which may include the memory  360  and which may be the entire UE  104 ,  802  or a component of the UE  104 ,  802 , such as the TX processor  368 , the RX processor  356 , and/or the controller/processor  359 ). It should be understood that operations indicated with dashed lines represent optional operations. 
     At  1402 , the UE receives a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band. For example, with reference to  FIG.  8   , the UE  802  may receive a resource allocation  806  from the base station  804 . The resource allocation  806  may include one or more portions of a frequency band, such as one or more flexible BWPs. 
     At  1404 , the UE receives a control message identifying frequency resources of the at least one portion of the frequency band to be used for repetitions of an uplink signal transmission. For example, with reference to  FIG.  8   , the UE  802  may receive a repetition control message  807  from the base station  804 . In some examples, the repetition control message  807  may indicate a certain flexible bandwidth part, such as the flexible BWP  1004  in  FIGS.  10 A and  10 B , that the UE  802  should use for transmitting repetitions of an uplink signal transmission. 
     At  1406 , the UE transmits a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on a third slot format associated with the at least one portion of the frequency band when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on either of the first slot format and the second slot format. 
     In some examples, the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on either of the first and second slot formats when a first number of uplink slots in the first slot format is less than the number of repetitions of the uplink signal transmission and a second number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. In some examples, the first slot format includes a first number of uplink slots, the second slot format includes a second number of uplink slots, and the third slot format includes a third number of uplink slots, wherein the third number of uplink slots exceeds the first number of uplink slots and exceeds the second number of uplink slots. In some examples, a first number of uplink slots in the first slot format is less than the number of repetitions of the uplink signal transmission, a second number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission, and a third number of uplink slots in the third slot format is greater than or equal to the number of repetitions of the uplink signal transmission. 
     For example, with reference to  FIG.  8   , the UE  802  (e.g., at  808 ) may determine a number (e.g., N) of repetitions of an uplink signal transmission to be transmitted in the portion of the frequency band allocated to the UE  802 . The UE  802  (e.g., at  810 ) may determine that the number of repetitions of the uplink signal transmission cannot be transmitted in the portion of the frequency band based on a slot format associated with the portion of the frequency band. The UE  802  (e.g., at  812 ) may determine a different slot format for the portion of the frequency band which enables transmission of the number of repetitions of the uplink signal transmission. 
     For example, with reference to  FIGS.  10 A and  10 B , if the UE  802  has determined that four repetitions (e.g., N=4) of an uplink signal transmission are to be transmitted in the portion of the frequency band (e.g., in the flexible BWP  1004 ), at least four uplink slots may be needed in the portion of the frequency band. Since the second slot format  1050  (shown in  FIG.  10 A ) associated with the flexible BWP  1004  designates one slot (e.g., slot  1046 ) as an uplink slot, the UE  802  may determine that four repetitions of an uplink signal transmission cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  1004 ) based on the second slot format  1050 . Furthermore, since the first slot format  1006  shown in  FIG.  10 A  associated with the carrier bandwidth  1002  includes three uplink slots (e.g., at slots  1024 ,  1026 ,  1028 ), the UE  802  may determine that four repetitions of an uplink signal transmission also cannot be transmitted in the portion of the frequency band (e.g., in the flexible BWP  1004 ) based on the first slot format  1006 . 
     In the example of  FIG.  10 A , the second optional slot format  1053  associated with the portion of the frequency band (e.g., the flexible BWP  1004 ) includes four uplink slots. Therefore, the UE  802  may apply the second optional slot format  1053  to the portion of the frequency band (e.g., in the flexible BWP  1004 ). This may change slots  1040 ,  1042 ,  1044 ,  1046  corresponding to the uplink slots in the second optional slot format  1053  to uplink slots as shown in  FIG.  10 B . The UE  802  may use the slots  1040 ,  1042 ,  1044 ,  1046  to transmit the four repetitions of the uplink signal transmission. 
       FIG.  15    is a flowchart  1500  of a method of wireless communication. The method may be performed by a UE (e.g., the UE  104 ,  1102 ; the apparatus  1602 / 1602 ′; the processing system  1714 , which may include the memory  360  and which may be the entire UE  104 ,  1102  or a component of the UE  104 ,  1102 , such as the TX processor  368 , the RX processor  356 , and/or the controller/processor  359 ). It should be understood that operations indicated with dashed lines represent optional operations. 
     At  1502 , the UE receives a resource allocation in a frequency band, the resource allocation including a plurality of portions of the frequency band, wherein each of plurality of portions of the frequency band is associated with a different slot format. For example, with reference to  FIG.  11   , the UE  1102  may receive a resource allocation  1106  from the base station  1104 . The resource allocation  1106  may include multiple portions of a frequency band. For example, each of the multiple portions of a frequency band may be a flexible BWP. 
     At  1504 , the UE optionally receives a control message identifying at least a first portion and a second portion of the frequency band to be used for transmission of the number of repetitions of the uplink signal transmission. For example, with reference to  FIG.  11   , the UE  1102  may optionally receive a repetition control message  1107  from the base station  1104 . In some examples, the repetition control message  1107  may identify at least a first portion and a second portion of the frequency band (e.g., the flexible BWP1  1204  and the flexible BWP2  1206 ) that the UE  1102  should use for transmitting repetitions of an uplink signal transmission. In some examples, the repetition control message  1107  may indicate a certain slot format (e.g., a TDD pattern) for each of the at least first and second portions of the frequency band. 
     At  1506 , the UE transmits a number of repetitions of an uplink signal transmission using at least a first portion and a second portion of the frequency band included in the plurality of portions of the frequency band, wherein a first portion of the number of repetitions of the uplink signal transmission is transmitted in the first portion of the frequency band and a second portion of the number of repetitions of the uplink signal transmission is transmitted in the second portion of the frequency band. 
     In some examples, the second portion of the number of repetitions of the uplink signal transmission is transmitted in the second portion of the frequency band when a first current slot of the first portion of the frequency band is not an uplink slot and a second current slot of the second portion of the frequency band is the uplink slot, and wherein the first current slot is overlapping with the second current slot. 
     For example, with reference to  FIGS.  11  and  12   , if the UE  1102  has determined that three repetitions (e.g., N=3) of an uplink signal transmission are to be transmitted in the second portion of the frequency band (e.g., in the flexible BWP2  1206 ), three uplink slots may be needed in the second portion of the frequency band. Since the second slot format  1230  associated with the flexible BWP2  1206  designates two slots (e.g., slots  1242 ,  1244 ) as uplink slots, the UE  1102  may determine that three repetitions of an uplink signal transmission cannot be transmitted in the second portion of the frequency band (e.g., in the flexible BWP2  1206 ) based on the second slot format  1230 . In some examples, if the current slot in the second portion of the frequency band (e.g., in the flexible BWP2  1206 ) is not designated as an uplink slot (e.g., the current slot is designated as a downlink slot) in the portion of the frequency band allocated for the transmission of the repetitions of the uplink signal, the UE  1102  may determine whether the current slot in a different portion of the frequency band configured for the UE  1102  is designated as an uplink slot. 
     For example, when the UE  1102  is using the second portion of the frequency band (e.g., in the flexible BWP2  1206 ) for uplink transmissions and when slot  1246  (e.g., a downlink slot) represents the current slot, the UE  1102  may not be able to transmit the third repetition of the uplink signal. In this case, the UE  1102  may determine that the current slot in the first portion of the frequency band (e.g., the flexible BWP1  1204 ), such as slot  1226 , is designated as an uplink slot. The UE  1102  may transmit the third repetition of the uplink signal  1254  in the first portion of the frequency band (e.g., flexible BWP1  1204 ) at slot  1226 . 
       FIG.  16    is a conceptual data flow diagram  1600  illustrating the data flow between different means/components in an example apparatus  1602 . The apparatus may be a UE. The apparatus includes a reception component  1604  that receives downlink signals from a base station  1650 , such as the resource allocation  1616  and/or the control message  1618 . The apparatus includes a resource allocation reception component  1606  that receives the resource allocation  1616  via a signal  1620  from the reception component  1604 . In some aspects, the resource allocation  1616  may allocate resources to the apparatus in a frequency band including at least one portion of the frequency band. A first slot format may be associated with the frequency band and a second slot format may be associated with the at least one portion of the frequency band. In some aspects, the resource allocation  1616  may allocate resources to the apparatus in a frequency band including a plurality of portions of the frequency band, wherein each of plurality of portions of the frequency band is associated with a different slot format. 
     The apparatus further includes a control message reception component  1608  that receives the control message  1618  (also referred to as a repetition control message) via a signal  1619  from the reception component  1604 . In some aspects, the control message  1618  identifies frequency resources of the at least one portion of the frequency band to be used for repetitions of an uplink signal transmission. In some aspects, if a plurality of portions of the frequency band are allocated to the apparatus, the control message  1618  identifies at least first and second portions of the frequency band to be used for transmission of the number of repetitions of the uplink signal transmission. 
     The apparatus further includes a slot format application component  1610 . In some aspects, the slot format application component  1610  provides a signal  1624  to the uplink signal repetition transmission component  1612  indicating a slot format to be applied to a portion of a frequency band. In some aspects, the slot format application component  1610  applies (e.g., via the signal  1624 ) the first slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. In some aspects, the slot format application component  1610  applies (e.g., via the signal  1624 ) the second slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. 
     The apparatus further includes an uplink signal repetition transmission component  1612 . The uplink signal repetition transmission component  1612  may receive the resource allocation  1616  from the resource allocation reception component  1606  via a signal  1622  and the control message  1618  from the control message reception component  1608  via a signal  1626 . The uplink signal repetition transmission component  1612  determines a number of repetitions of an uplink signal transmission to be transmitted in a portion of a frequency band and determines that the number of repetitions of the uplink signal transmission cannot be transmitted in the portion of the frequency band based on a slot format associated with the portion of the frequency band. 
     The uplink signal repetition transmission component  1612  determines a different slot format for the portion of the frequency band which enables transmission of the number of repetitions of the uplink signal transmission or determines to transmit the repetitions of the uplink signal transmission using multiple portions of the frequency band, where each of the multiple portions of the frequency band is associated with a different slot format. 
     The uplink signal repetition transmission component  1612  transmits a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on the first slot format when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format. The uplink signal repetition transmission component  1612  further transmits a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on a third slot format associated with the at least one portion of the frequency band when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on either of the first and second slot formats. The uplink signal repetition transmission component  1612  further transmits a number of repetitions of an uplink signal transmission using at least first and second portions of the frequency band included in the plurality of portions of the frequency band, wherein a first portion of the number of repetitions of the uplink signal transmission is transmitted in the first portion of the frequency band and a second portion of the number of repetitions of the uplink signal transmission is transmitted in the second portion of the frequency band. 
     The apparatus includes a transmission component  1614  that transmits uplink signals to the base station  1650 . 
     The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of  FIGS.  13 - 15   . As such, each block in the aforementioned flowcharts of  FIGS.  13 - 15    may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof. 
       FIG.  17    is a diagram  1700  illustrating an example of a hardware implementation for an apparatus  1602 ′ employing a processing system  1714 . The processing system  1714  may be implemented with a bus architecture, represented generally by the bus  1724 . The bus  1724  may include any number of interconnecting buses and bridges depending on the specific application of the processing system  1714  and the overall design constraints. The bus  1724  links together various circuits including one or more processors and/or hardware components, represented by the processor  1704 , the components  1604 ,  1606 ,  1608 ,  1610 ,  1612 ,  1614 , and the computer-readable medium/memory  1706 . The bus  1724  may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further. 
     The processing system  1714  may be coupled to a transceiver  1710 . The transceiver  1710  is coupled to one or more antennas  1720 . The transceiver  1710  provides a means for communicating with various other apparatus over a transmission medium. The transceiver  1710  receives a signal from the one or more antennas  1720 , extracts information from the received signal, and provides the extracted information to the processing system  1714 , specifically the reception component  1604 . In addition, the transceiver  1710  receives information from the processing system  1714 , specifically the transmission component  1614 , and based on the received information, generates a signal to be applied to the one or more antennas  1720 . The processing system  1714  includes a processor  1704  coupled to a computer-readable medium/memory  1706 . The processor  1704  is responsible for general processing, including the execution of software stored on the computer-readable medium/memory  1706 . The software, when executed by the processor  1704 , causes the processing system  1714  to perform the various functions described supra for any particular apparatus. The computer-readable medium/memory  1706  may also be used for storing data that is manipulated by the processor  1704  when executing software. The processing system  1714  further includes at least one of the components  1604 ,  1606 ,  1608 ,  1610 ,  1612 ,  1614 . The components may be software components running in the processor  1704 , resident/stored in the computer readable medium/memory  1706 , one or more hardware components coupled to the processor  1704 , or some combination thereof. The processing system  1714  may be a component of the UE  350  and may include the memory  360  and/or at least one of the TX processor  368 , the RX processor  356 , and the controller/processor  359 . Alternatively, the processing system  1714  may be the entire UE (e.g., see  350  of  FIG.  3   ). 
     In one configuration, the apparatus  1602 / 1602 ′ for wireless communication includes means for receiving a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band, means for receiving a control message identifying frequency resources of the at least one portion of the frequency band to be used for repetitions of an uplink signal transmission, means for receiving a resource allocation in a frequency band, the resource allocation including a plurality of portions of the frequency band, wherein each of plurality of portions of the frequency band is associated with a different slot format, means for applying the first slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted, means for applying the second slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted, means for receiving a control message identifying frequency resources of the at least one portion of the frequency band to be used for repetitions of an uplink signal transmission, means for receiving a control message identifying the at least first and second portions of the frequency band to be used for transmission of the number of repetitions of the uplink signal transmission, means for transmitting a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on the first slot format when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format, means for transmitting a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on a third slot format associated with the at least one portion of the frequency band when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on either of the first and second slot formats, means for transmitting a number of repetitions of an uplink signal transmission using at least first and second portions of the frequency band included in the plurality of portions of the frequency band, wherein a first portion of the number of repetitions of the uplink signal transmission is transmitted in the first portion of the frequency band and a second portion of the number of repetitions of the uplink signal transmission is transmitted in the second portion of the frequency band. 
     The aforementioned means may be one or more of the aforementioned components of the apparatus  1602  and/or the processing system  1714  of the apparatus  1602 ′ configured to perform the functions recited by the aforementioned means. As described supra, the processing system  1714  may include the TX Processor  368 , the RX Processor  356 , and the controller/processor  359 . As such, in one configuration, the aforementioned means may be the TX Processor  368 , the RX Processor  356 , and the controller/processor  359  configured to perform the functions recited by the aforementioned means. 
     Therefore, the aspects described herein may enable a UE (e.g., a UE  802 ,  1102 ) allocated with a portion of a frequency band (e.g., a flexible bandwidth part), or allocated with multiple portions of a frequency band (e.g., multiple flexible bandwidth parts), to transmit a number of repetitions of an uplink signal transmission when an amount of uplink resources (e.g., uplink slots) in the portion of the frequency band are insufficient. This may enable a UE to access the uplink resources needed to transmit the desired number of repetitions of an uplink signal transmission. In some scenarios, the uplink signal transmission may include a transport block that may not be successfully received (e.g., at a base station) without a suitable number of repetitions (e.g., in cases where a UE is experiencing poor channel conditions). Therefore, the aspects described herein may significantly improve the performance of the UE. 
     The following provides an overview of aspects of the present disclosure: 
     Aspect 1: An apparatus for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: receive a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band; and transmit a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on the first slot format when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format. 
     Aspect 2: The apparatus of aspect 1, wherein the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format when a number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. 
     Aspect 3: The apparatus of aspect 1 or 2, wherein the first slot format includes a first number of uplink slots and the second slot format includes a second number of uplink slots, wherein the first number of uplink slots exceeds the second number of uplink slots. 
     Aspect 4: The apparatus of any of aspects 1 through 3, wherein a first number of uplink slots in the first slot format is greater than or equal to the number of repetitions of the uplink signal transmission, and a second number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. 
     Aspect 5: The apparatus of any of aspects 1 through 4, wherein the at least one processor is further configured to: receive a control message identifying frequency resources of the at least one portion of the frequency band to be used for repetitions of the uplink signal transmission. 
     Aspect 6: The apparatus of any of aspects 1 through 5, wherein the at least one processor is further configured to: apply the first slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. 
     Aspect 7: The apparatus of any of aspects 1 through 5, wherein the at least one processor is further configured to: apply the second slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. 
     Aspect 8: A method of wireless communication, comprising: receiving a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band; and transmitting a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on the first slot format when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format. 
     Aspect 9: The method of aspect 8, wherein the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on the second slot format when a number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. 
     Aspect 10: The method of aspect 8 or 9, wherein the first slot format includes a first number of uplink slots and the second slot format includes a second number of uplink slots, wherein the first number of uplink slots exceeds the second number of uplink slots. 
     Aspect 11: The method of any of aspects 8 through 10, wherein a first number of uplink slots in the first slot format is greater than or equal to the number of repetitions of the uplink signal transmission, and a second number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. 
     Aspect 12: The method of any of aspects 8 through 11, further comprising: 
     receiving a control message identifying frequency resources of the at least one portion of the frequency band to be used for repetitions of the uplink signal transmission. 
     Aspect 13: The method of any of aspects 8 through 12, further comprising: applying the first slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. 
     Aspect 14: The method of any of aspects 8 through 12, further comprising: applying the second slot format to the at least one portion of the frequency band after the number of repetitions of the uplink signal transmission are transmitted. 
     Aspect 15: An apparatus for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: receive a resource allocation in a frequency band, the resource allocation including at least one portion of the frequency band, wherein a first slot format is associated with the frequency band and a second slot format is associated with the at least one portion of the frequency band; and transmit a number of repetitions of an uplink signal transmission in the at least one portion of the frequency band based on a third slot format associated with the at least one portion of the frequency band when the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on either of the first slot format and the second slot format. 
     Aspect 16: The apparatus of aspect 15, wherein the at least one processor is further configured to: receive a control message identifying frequency resources of the at least one portion of the frequency band to be used for repetitions of the uplink signal transmission. 
     Aspect 17: The apparatus of aspect 15 or 16, wherein the number of repetitions of the uplink signal transmission cannot be transmitted in the at least one portion of the frequency band based on either of the first slot format and the second slot format when a first number of uplink slots in the first slot format is less than the number of repetitions of the uplink signal transmission and a second number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission. 
     Aspect 18: The apparatus of any of aspects 15 through 17, wherein the first slot format includes a first number of uplink slots, the second slot format includes a second number of uplink slots, and the third slot format includes a third number of uplink slots, wherein the third number of uplink slots exceeds the first number of uplink slots and exceeds the second number of uplink slots. 
     Aspect 19: The apparatus of any of aspects 15 through 18, wherein a first number of uplink slots in the first slot format is less than the number of repetitions of the uplink signal transmission, a second number of uplink slots in the second slot format is less than the number of repetitions of the uplink signal transmission, and a third number of uplink slots in the third slot format is greater than or equal to the number of repetitions of the uplink signal transmission. 
     Aspect 20: An apparatus for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: receive a resource allocation in a frequency band, the resource allocation including a plurality of portions of the frequency band, wherein each of plurality of portions of the frequency band is associated with a different slot format; and transmit a number of repetitions of an uplink signal transmission using at least a first portion and a second portion of the frequency band included in the plurality of portions of the frequency band, wherein a first portion of the number of repetitions of the uplink signal transmission is transmitted in the first portion of the frequency band and a second portion of the number of repetitions of the uplink signal transmission is transmitted in the second portion of the frequency band. 
     Aspect 21: The apparatus of aspect 20, wherein the second portion of the number of repetitions of the uplink signal transmission is transmitted in the second portion of the frequency band when a first current slot of the first portion of the frequency band is not an uplink slot and a second current slot of the second portion of the frequency band is the uplink slot, and wherein the first current slot is overlapping with the second current slot. 
     Aspect 22: The apparatus of aspects 20 or 21, wherein the at least one processor is further configured to: receive a control message identifying the at least first portion and second portion of the frequency band to be used for transmission of the number of repetitions of the uplink signal transmission. 
     Aspect 23: The apparatus of any of aspects 20 through 22, wherein the control message indicates a slot format for each of the at least first portion and second portion of the frequency band. 
     It is understood that the specific order or hierarchy of blocks in the processes/flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes/flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented. 
     The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module,” “mechanism,” “element,” “device,” and the like may not be a substitute for the word “means.” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for.”