Coherence indication for demodulation reference signal bundling

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive a configuration indicating that the UE is to apply demodulation reference signal (DMRS) bundling for physical uplink shared channel (PUSCH) transmissions. The UE can maintain phase coherence across multiple PUSCH transmissions for which the DMRS bundling is applied to enable joint channel estimation across the multiple PUSCH transmissions. The UE can transmit uplink control information (UCI) including a coherence indication based at least in part on the configuration. The UE can multiplex the UCI with a PUSCH transmission of the multiple PUSCH transmissions for which the DMRS bundling is applied. The coherence indication can indicate whether the PUSCH transmission is coherent with one or more other PUSCH transmissions of the multiple PUSCH transmissions transmitted by the UE. Numerous other aspects are described.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 137,860, filed January 15, 2021, entitled “COHERENCE INDICATION FOR DEMODULATION REFERENCE SIGNAL BUNDLING,” and U.S. Non-Provisional Patent Application No. 17 / 644,206, filed December 14, 2021, entitled “COHERENCE INDICATION FOR DEMODULATION REFERENCE SIGNAL BUNDLING,” both of which are expressly incorporated herein by reference. Technical Field

[0003] This disclosure relates generally to wireless communication, and more specifically to techniques and apparatus for coherence indication of demodulation reference signal bundling. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth or transmit power). 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, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a collection of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard released by the 3rd Generation Partnership Project (3GPP).

[0005] The aforementioned multiple access technologies have already been adopted in various telecommunications standards to provide a common protocol enabling different user equipment (UEs) to communicate at the city, national, regional, and even global levels. New Radio (NR), also known as 5G, is a collection of enhancements to the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband internet access by improving spectrum efficiency, reducing costs, enhancing service, utilizing new spectrum, and better integrating with other open standards that support beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation, using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) on the downlink (DL), CP-OFDM or SC-FDMA (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL). However, with the continued growth in demand for mobile broadband access, there is a need for further improvements to LTE and NR technologies. Preferably, these improvements are applicable to other multiple access technologies and telecommunications standards that employ these technologies.

[0006] In some examples, the base station can signal to the UE whether to enable demodulation reference signal (DMRS) bundling for Physical Uplink Shared Channel (PUSCH) transmissions. In other examples, the base station can instruct the UE to apply DMRS bundling to PUSCH transmissions that meet a set of conditions. The set of conditions may relate to whether the UE can maintain phase coherence across PUSCH transmissions, such as whether PUSCH transmissions use the same frequency resource allocation, the same transmit power, the same beam, or are transmitted sequentially in time, among other examples. However, in some scenarios, the base station cannot explicitly determine whether the set of conditions for PUSCH DMRS bundling is met. This can lead to communication errors, inaccurate channel estimation by the base station, or failure to properly demodulate PUSCH transmissions, among other issues. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) includes receiving a configuration instructing the UE to apply demodulation reference signal (DMRS) bundling to physical uplink shared channel (PUSCH) transmissions. The UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across the multiple PUSCH transmissions. The method may include transmitting uplink control information (UCI) including a coherence indication, at least in part based on the configuration. The UCI is multiplexed with PUSCH transmissions among the multiple PUSCH transmissions with applied DMRS bundling. The coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0008] In some aspects, a method of wireless communication performed by a base station includes: transmitting a configuration instructing a UE to apply DMRS bundling to PUSCH transmissions. The UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions by the base station. The method includes: receiving a UCI including a coherence indication based at least in part on the configuration. The UCI is multiplexed with PUSCH transmissions among the multiple PUSCH transmissions with applied DMRS bundling. The coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0009] In some aspects, a UE for wireless communication includes: at least one processor and at least one memory communicatively coupled to the at least one processor. The memory stores processor-readable code executable by the at least one processor. The processor-readable code is configured to cause the UE to receive a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions. The UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across the multiple PUSCH transmissions. The processor-readable code is configured to cause the UE to transmit a UCI including a coherence indication based at least in part on this configuration. The processor-readable code is configured to cause the UE to multiplex the UCI with the PUSCH transmissions in the multiple PUSCH transmissions with applied DMRS bundling. The coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0010] In some aspects, a base station for wireless communication includes: at least one processor, and at least one memory communicatively coupled to the at least one processor. The memory stores processor-readable code executable by the at least one processor. The processor-readable code is configured to cause the base station to transmit a configuration instructing a UE to apply DMRS bundling to PUSCH transmissions. The UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions by the base station. The processor-readable code is configured to cause the base station to receive a UCI including a coherence indication based at least in part on this configuration. The UCI is multiplexed with PUSCH transmissions in the multiple PUSCH transmissions with applied DMRS bundling. The coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of the UE, cause the UE to receive a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions. The UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across the multiple PUSCH transmissions. The one or more instructions, when executed by one or more processors of the UE, cause the UE to transmit a UCI including a coherence indication, at least in part, based on the configuration. The UCI is multiplexed with the PUSCH transmissions among the multiple PUSCH transmissions with applied DMRS bundling. The coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0012] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of a base station, cause the base station to transmit a configuration instructing a UE to apply DMRS bundling to PUSCH transmissions. The UE maintains phase coherence across multiple PUSCH transmissions with DMRS bundling applied to enable joint channel estimation by the base station across multiple PUSCH transmissions. The one or more instructions, when executed by one or more processors of the base station, cause the base station to receive a UCI including a coherence indication based at least in part on the configuration. The UCI is multiplexed with PUSCH transmissions among the multiple PUSCH transmissions with DMRS bundling applied. The coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0013] In some aspects, an apparatus for wireless communication includes: components for receiving a configuration instructing the apparatus to apply DMRS bundling to PUSCH transmissions. The apparatus maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across the multiple PUSCH transmissions. The apparatus includes: components for transmitting a UCI including a coherence indication, at least partially based on the configuration. The UCI is multiplexed with PUSCH transmissions among the multiple PUSCH transmissions with applied DMRS bundling. The coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the apparatus.

[0014] In some aspects, an apparatus for wireless communication includes: components for transmitting a configuration instructing a UE to apply DMRS bundling to PUSCH transmissions. The UE maintains phase coherence across multiple PUSCH transmissions with DMRS bundling applied to enable joint channel estimation by the apparatus across multiple PUSCH transmissions. The apparatus includes: components for receiving a UCI including a coherence indication based at least in part on the configuration. The UCI is multiplexed with PUSCH transmissions among the multiple PUSCH transmissions with DMRS bundling applied. The coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0015] The aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment, or processing systems as described substantially with reference to the accompanying drawings and specifications and as illustrated therein.

[0016] The features and technical advantages of the examples according to this disclosure have been outlined rather broadly above to facilitate a better understanding of the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily utilized as the basis for modifying or designing other structures for carrying out the same purpose of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, their organization, and methods of operation, as well as their associated advantages, will be better understood from the following description when considered in conjunction with the accompanying drawings. Each figure is provided for illustrative and descriptive purposes and is not intended to define limitations of the claims. Attached Figure Description

[0017] To enable a more detailed understanding of the features of this disclosure described above, a more specific description of the brief overview can be obtained by referring to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only some typical aspects of this disclosure and should therefore not be considered as limiting its scope, as the description may acknowledge other equivalent aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 This is a diagram illustrating an example of a wireless network according to this disclosure.

[0019] Figure 2 This is a diagram illustrating an example base station (BS) communicating with a user equipment (UE) in a wireless network according to this disclosure.

[0020] Figure 3 This is a diagram illustrating an example of physical channels and reference signals in a wireless network according to this disclosure.

[0021] Figure 4 This is a diagram illustrating an example of a demodulation reference signal (DMRS) bundle according to this disclosure.

[0022] Figure 5 and Figure 6 This is a diagram illustrating an example of a coherence indication associated with DMRS bundling according to this disclosure.

[0023] Figure 7 This is a flowchart illustrating an example process performed, for example, by a UE that supports coherence indication for DMRS bundling, according to this disclosure.

[0024] Figure 8 This is a flowchart illustrating an example process performed, for example, by a base station supporting coherence indication for DMRS bundling, according to this disclosure.

[0025] Figure 9 and Figure 10 This is a block diagram of an example device for wireless communication that supports coherence indication for DMRS bundling, according to the present disclosure. Detailed Implementation

[0026] Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and is not to be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be exhaustive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or method of practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or method practiced using other structures, functions, or structures and functions other than or different from the aspects of this disclosure set forth herein. Any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0027] Several aspects of a telecommunications system will now be presented with reference to various devices and technologies. These devices and technologies will be described in detail below and illustrated in the accompanying drawings by various boxes, modules, components, circuits, steps, processes, and algorithms (collectively referred to as “elements”). These elements can be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0028] Various aspects generally involve enabling user equipment (UE) to use coherence indications to indicate or control Physical Uplink Shared Channel (PUSCH) demodulation reference signal (DMRS) bundling. Some aspects more specifically involve UE transmissions indicating to the base station whether different PUSCH transmissions for PUSCH DMRS bundling are phase-coherent (or phase-continuous) with each other. In some aspects, the UE may transmit coherence indications of PUSCH transmissions (e.g., in each PUSCH transmission) in uplink control information (UCI) multiplexed with PUSCH transmissions, enabling implicit indications of the PUSCH transmissions to which coherence indications are applied.

[0029] Specific aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some examples, the described techniques can be used to provide a clear indication of whether different PUSCH transmissions are phase-coherent with each other. As a result, the base station can correctly determine when to use multiple DMRS to perform joint channel estimation for PUSCH transmissions (or multiple PUSCH transmissions), thereby improving the accuracy of channel estimation, reducing communication errors, and improving the demodulation of PUSCH transmissions (or multiple PUSCH transmissions).

[0030] Figure 1 This is a diagram illustrating an example of a wireless network according to this disclosure. The wireless network may be or may include elements of a 5G (NR) network or an LTE network, as well as other examples. The wireless network may include one or more base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G node B (NB), access point, or Transmit Receive Point (TRP), as well as other examples. Each BS may provide communication coverage for a specific geographic area. In 3GPP, depending on the context in which the term is used, the term "cell" may refer to the coverage area of ​​a BS or a BS subsystem serving that coverage area.

[0031] A BS can provide communication coverage for macrocells, picocells, femtocells, or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with a service subscription. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with a service subscription. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS used for macrocells can be called a macro BS. A BS used for picocells can be called a pico BS. A BS used for femtocells can be called a femto BS or a home BS. A BS can support one or more (e.g., three) cells.

[0032] Wireless networks can be heterogeneous networks comprising different types of Base Stations (BSs) (such as macro BSs, pico BSs, femto BSs, or relay BSs). These different types of BSs can have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network. For example, macro BSs can have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 watts). Figure 1In the example shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. Network controller 130 can be coupled to a set of BSs 110a and 110b and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. BSs can also communicate with each other, for example, directly or indirectly via wireless or wired backhaul.

[0033] In some respects, the cell may not be static; rather, the geographical area of ​​the cell can move depending on the location of the mobile BS. In some respects, BSs can use any suitable transport network to interconnect with each other or to one or more other BSs or network nodes (not shown) in a wireless network via various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0034] A wireless network may also include relay stations. A relay station is an entity that receives data transmissions from an upstream station (e.g., a BS or a UE) and transmits data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that relays data transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, repeater, and other examples.

[0035] UEs 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, user unit, or station, among other examples. A UE may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), an in-vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, or any other suitable device configured to communicate via a wireless medium.

[0036] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, or location tags, and other examples, which can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node can provide connectivity to or from a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links. Some UEs can be considered Internet-of-Things (IoT) devices, or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing that houses the components of UE 120, such as processor components or memory components, and other examples.

[0037] Typically, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific Radio Access Technology (RAT) and can operate on one or more frequencies or frequency channels. In other examples, a frequency may also be referred to as a carrier. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0038] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly with each other using one or more sidelink channels (e.g., without using base station 110 as an intermediary). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), mesh networks, or combinations thereof. In such examples, UE 120 may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as being performed by base station 110.

[0039] Wireless network devices can communicate using the electromagnetic spectrum, which can be subdivided into various classes, bands, channels, etc., based on frequency or wavelength. For example, wireless network devices can communicate using an operating frequency band with a first frequency range (FR1), which can span from 410 MHz to 7.125 GHz. As another example, wireless network devices can communicate using an operating frequency band with a second frequency range (FR2), which can span from 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as intermediate frequency (IF) bands. Although parts of FR1 are greater than 6 GHz, FR1 is often referred to as the "sub-6 GHz" band. Similarly, FR2 is often referred to as the "millimeter wave" band, although it is different from the Extremely High Frequency (EHF) band (30 GHz–300 GHz) designated as "millimeter wave" by the International Telecommunication Union (ITU). Therefore, unless otherwise specified, it should be understood that the term "below 6 GHz" can broadly refer to frequencies less than 6 GHz, frequencies within FR1, intermediate frequency (IF) frequencies (e.g., greater than 7.125 GHz), or combinations thereof. Similarly, unless otherwise specified, it should be understood that the term "millimeter wave" can broadly refer to frequencies within the EHF band, frequencies within FR2, intermediate frequency (e.g., less than 24.25 GHz), or combinations thereof. The frequencies included in FR1 and FR2 can be modified, and the techniques described herein are applicable to these modified frequency ranges.

[0040] Figure 2 This is a diagram illustrating an example base station communicating with a UE in a wireless network according to this disclosure. The base station may correspond to... Figure 1 Base station 110. Similarly, the UE can correspond to Figure 1 UE 120.

[0041] Base station 110 may be equipped with T antennas 234a to 234t, and UE 120 may be equipped with R antennas 252a to 252r, wherein typically T ≥ 1 and R ≥ 1. At base station 110, transmitting processor 220 may receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a Channel Quality Indicator (CQI) received from the UE, process (e.g., encode) data for each UE based at least in part on the selected MCS(one or more) for the UE, and provide data symbols for all UEs. Transmitting processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and other examples) and control information (e.g., CQI requests, grants, or upper-layer signaling) and provide overhead symbols and control symbols. Transmitting processor 220 may also generate reference symbols for reference signals and synchronization signals. Where applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, or reference symbols and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each MOD 232 can process its corresponding output symbol stream (e.g., for OFDM and other examples) to obtain an output sample stream. Each MOD 232 can also process (e.g., to analog conversion, amplification, filtering, and up-conversion) the output sample stream to obtain a downlink signal. The T downlink signals from MODs 232a to 232t can be transmitted via T antennas 234a to 234t, respectively.

[0042] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 or other base stations and can provide the received signals to R demodulators (DEMODs) 254a to 254r respectively. Each DEMOD 254 can adjust (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each DEMOD 254 can also process the input sample (e.g., for OFDM) to obtain the received symbol. MIMO detector 256 can obtain the received symbol from all R DEMODs 254a to 254r, perform MIMO detection on the received symbol if applicable, and provide the detected symbol. Receiver processor 258 can process (e.g., decode) the detected symbol, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors (e.g., at least one processor), or a combination of one or more controllers and one or more processors. The channel processor can determine one or more parameters, including the Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), or Channel Quality Indicator (CQI), as well as others. In some aspects, one or more components of the UE 120 may be included in a housing.

[0043] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, for example, in the core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0044] Antennas (such as antennas 234a to 234t or antennas 252a to 252r) may include or be included within one or more antenna panels, antenna groups, collections of antenna elements, or antenna arrays, among other examples. Antenna panels, antenna groups, collections of antenna elements, or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, collections of antenna elements, or antenna arrays may include collections of coplanar antenna elements or collections of non-coplanar antenna elements. Antenna panels, antenna groups, collections of antenna elements, or antenna arrays may include antenna elements within a single housing or antenna elements within multiple housings. Antenna panels, antenna groups, collections of antenna elements, or antenna arrays may include one or more antenna elements coupled to one or more transmitting or receiving components, such as... Figure 2 One or more components.

[0045] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, or CQI). The transmitting processor 264 can also generate reference symbols for one or more reference signals. Where applicable, the symbols from the transmitting processor 264 can be pre-encoded by the TX MIMO processor 266, further processed by MODs 254a to 254r (e.g., for Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) or Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM)), and transmitted to base station 110. In some aspects, the modulator and demodulator of UE 120 (e.g., MOD / DEMOD 254) can be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulator(s) 254, demodulator(s) 254, MIMO detector(s) 256, receiver(s) 258, transmitter(s) 264, or TX MIMO processor(s) 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 (e.g., at least one memory) to perform aspects of any of the methods described herein.

[0046] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by DEMOD 232, detected by MIMO detector 236 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and can communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 for scheduling UE 120 for downlink and uplink communications. In some aspects, modulators and demodulators (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes transceivers. The transceiver may include (or one or more) antennas 234, modulators 232, demodulators 232, MIMO detectors 236, receiver processors 238, transmitter processors 220, or any combination of TX MIMO processors 230. The transceiver may be used by a processor (e.g., controller / processor 240) and a memory 242 (e.g., at least one memory) to perform aspects of any of the methods described herein.

[0047] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 or Figure 2 Any other component(s) may perform one or more techniques associated with coherence indication bundled with the demodulation reference signal (DMRS), as described in detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, or... Figure 2 Any other component(s) can perform or direct, for example Figure 7 Process 700 Figure 8 The operation of process 800 or other processes as described herein. Memory 242 and 282 (e.g., at least one memory) may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 or memory 282 (e.g., at least one memory) may include a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, and / or processor-readable code) for wireless communication. For example, one or more instructions, when executed by one or more processors (e.g., at least one processor) of base station 110 or UE 120 (e.g., directly or after compilation, transformation, or interpretation), may cause one or more processors, UE 120, or base station 110 to perform or direct, for example... Figure 7 Process 700 Figure 8The operation of process 800 or other processes as described herein. In some aspects, the execution instructions may include run instructions, translate instructions, compile instructions, or interpret instructions, among other examples. One or more instructions stored in memory 242 may be configured to cause base station 110 to perform the operations described herein when one or more instructions are executed by at least one processor of base station 110. Similarly, one or more instructions stored in memory 282 may be configured to cause UE 120 to perform the operations described herein when one or more instructions are executed by at least one processor of UE 120.

[0048] In some aspects, the UE includes: components for receiving a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions; or components for transmitting a UCI including a coherence indication based at least in part on the configuration, wherein the UCI is multiplexed with PUSCH transmissions among multiple PUSCH transmissions with applied DMRS bundling, and wherein the coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among multiple PUSCH transmissions transmitted by the UE. Components for the UE to perform the operations described herein may include, for example, one or more of the following: antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, or memory 282.

[0049] In some aspects, the UE includes components for receiving an indication of a defined time window. In some aspects, the UE includes components for transmitting an indication of the UE's ability to transmit a coherence indication for DMRS bundling. In some aspects, the UE includes components for receiving instructions to transmit a coherence indication for DMRS bundling.

[0050] In some aspects, the base station includes: components for transmitting a configuration instructing the UE to apply DMRS bundling to multiple PUSCH transmissions, wherein the UE supports phase coherence across multiple PUSCH transmissions with DMRS bundling applied to enable joint channel estimation across multiple PUSCH transmissions by the base station; or components for receiving a UCI including a coherence indication based at least in part on the configuration, wherein the UCI is multiplexed with PUSCH transmissions in the multiple PUSCH transmissions with DMRS bundling applied, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE. Components for the base station to perform the operations described herein may include, for example, one or more of the following: a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0051] In some aspects, the base station includes components for performing joint channel estimation for PUSCH transmission and one or more other PUSCH transmissions, at least partially based on a coherence indication. In some aspects, the base station includes components for performing separate channel estimation for PUSCH transmission, at least partially based on a coherence indication. In some aspects, the base station includes components for determining whether to perform joint channel estimation or separate channel estimation for PUSCH transmission, at least partially based on a coherence indication. In some aspects, the base station includes components for transmitting an indication of a defined time window. In some aspects, the base station includes components for receiving an indication of the UE's ability to support the transmission of a coherence indication for DMRS bundling. In some aspects, the base station includes components for transmitting a command for transmitting a coherence indication for DMRS bundling.

[0052] Figure 3 This is a diagram illustrating example 300 of a physical channel and reference signal in a wireless network according to this disclosure. Figure 3 As shown, the downlink channel and downlink reference signal can carry information from base station 110 to UE 120, and the uplink channel and uplink reference signal can carry information from UE 120 to base station 110.

[0053] As shown, downlink channels may include a Physical Downlink Control Channel (PDCCH) carrying downlink control information (DCI), a Physical Downlink Shared Channel (PDSCH) carrying downlink data, or a Physical Broadcast Channel (PBCH) carrying system information, among other examples. In some aspects, PDSCH communication may be scheduled by PDCCH communication. As further shown, uplink channels may include a Physical Uplink Control Channel (PUCCH) carrying uplink control information (UCI), a Physical Uplink Shared Channel (PUSCH) carrying uplink data, or a Physical Random Access Channel (PRACH) for initial network access, among other examples. In some aspects, UE 120 may send acknowledgment (ACK) or negative acknowledgment (NACK) feedback (e.g., ACK / NACK feedback or ACK / NACK information) in the UCI on the PUCCH or PUSCH.

[0054] As further illustrated, downlink reference signals may include a synchronization signal block (SSB), a channel state information (CSI) reference signal (CSI-RS), a DMRS, a positioning reference signal (PRS), or a phase tracking reference signal (PTRS), and other examples. As shown, uplink reference signals may include a sounding reference signal (SRS), a DMRS, or a PTRS, and other examples.

[0055] The SSB can carry information for initial network acquisition and synchronization, such as the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), PBCH, and PBCH DMRS. The SSB is sometimes referred to as a Synchronization Signal / PBCH (SS / PBCH) block. In some aspects, base station 110 can transmit multiple SSBs on multiple corresponding beams, and the SSBs can be used for beam selection.

[0056] The CSI-RS can carry information for downlink channel estimation (e.g., downlink CSI acquisition), which can be used for scheduling, link adaptation, beam management, and other examples. Base station 110 can configure a set of CSI-RS for UE 120, and UE 120 can measure the configured set of CSI-RS. Based at least in part on the measurement, UE 120 can perform channel estimation and can report channel estimation parameters to base station 110 (e.g., in a CSI report), such as Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), Layer Indicator (LI), Rank Indicator (RI), or Reference Signal Received Power (RSRP), and other examples. Base station 110 can use CSI reports to select transmission parameters for downlink communication to UE 120, such as the number of transmission layers (e.g., rank), precoding matrix (e.g., precoder), modulation and coding scheme (MCS), or refinement of downlink beams (e.g., using beam refinement or beam management procedures), and other examples.

[0057] DMRS can carry information for estimating radio channels for demodulation of associated physical channels (e.g., PDCCH, PDSCH, PBCH, PUCCH, or PUSCH). The design and mapping of DMRS can be specific to the physical channels to which it is used for estimation. DMRS is UE-specific, can be beamformed, can be confined to scheduled resources (e.g., not transmitted over broadband), and can be transmitted only when necessary. As shown, DMRS is used for both downlink and uplink communications.

[0058] PTRS can carry information for compensating oscillator phase noise. Typically, phase noise increases with increasing oscillator carrier frequency. Therefore, PTRS can be used at high carrier frequencies (such as millimeter-wave frequencies) to mitigate phase noise. PTRS can be used to track the phase of the local oscillator and enable the suppression of phase noise and common phase error (CPE). As shown, PTRS is used for both downlink communication (e.g., on PDSCH) and uplink communication (e.g., on PUSCH).

[0059] The PRS can carry information to enable timing or ranging measurements of the UE 120 based on signals transmitted by base station 110, thereby improving Observed Time Difference of Arrival (OTDOA) positioning performance. For example, the PRS can be a pseudo-random Quadrature Phase Shift Keying (QPSK) sequence mapped diagonally with frequency and time shifts to avoid conflicts with cell-specific reference signals and control channels (e.g., PDCCH). Typically, the PRS can be designed to improve the detectability of the UE 120, which may require detecting downlink signals from multiple neighboring base stations to perform OTDOA-based positioning. Accordingly, the UE 120 can receive PRS from multiple cells (e.g., a reference cell and one or more neighboring cells) and can report the Reference Signal Time Difference (RSTD) based on OTDOA measurements associated with the PRS received from the multiple cells. In some aspects, base station 110 can then calculate the location of the UE 120 based on the RSTD measurements reported by the UE 120.

[0060] The SRS can carry information for uplink channel estimation, which can be used for scheduling, link adaptation, precoder selection, beam management, and other examples. Base station 110 can configure one or more SRS resource sets for UE 120, and UE 120 can transmit SRS on the configured SRS resource sets. The SRS resource sets can have configuration purposes, such as uplink CSI acquisition, downlink CSI acquisition for reciprocity-based operation, uplink beam management, and other examples. Base station 110 can measure the SRS, perform channel estimation at least in part based on the measurement, and use the SRS measurement to configure communication with UE 120.

[0061] Figure 4 This is a diagram illustrating example 400 of a DMRS bundle according to this disclosure. A DMRS for a PUSCH (sometimes referred to as a PUSCH DMRS) can carry information for estimating the demodulated radio channel transmitted on the PUSCH. The design and mapping of the PUSCH DMRS can be specific to the PUSCH to which the DMRS is used for estimation.

[0062] When DMRS bundling is not performed, the base station can perform separate channel estimations for different PUSCH transmissions. For example, without utilizing DMRS bundling, the base station can perform channel estimation for demodulation of the PUSCH transmission using only the DMRS corresponding to the PUSCH transmission (e.g., without using any other DMRSs) (sometimes referred to as slot-specific channel estimation). In some examples, the DMRS corresponding to the PUSCH transmission may be a DMRS transmitted in the same time-domain resource as the PUSCH transmission (e.g., the same time slot or the same mini-time slot). Therefore, DMRS transmissions without utilizing DMRS bundling can be referred to as slot-specific DMRS transmissions.

[0063] refer to Figure 4 When DMRS bundling is not performed, the base station can perform separate channel estimation for the first PUSCH transmission 420-1 by using only the first DMRS 410-1 (and by not using any one of the second DMRS 410-2, third DMRS 410-3, or fourth DMRS 410-4) to estimate the PUSCH for demodulation of the first PUSCH transmission 420-1. As shown, the first DMRS 410-1 and the first PUSCH transmission 420-1 occur in the same time slot. Similarly, the base station can perform a separate channel estimation for the second PUSCH transmission 420-2 by using only the second DMRS 410-2 to estimate the demodulated PUSCH for the second PUSCH transmission 420-2, a separate channel estimation for the third PUSCH transmission 420-3 by using only the third DMRS 410-3 to estimate the demodulated PUSCH for the third PUSCH transmission 420-3, and a separate channel estimation for the fourth PUSCH transmission 420-4 by using only the fourth DMRS 410-4 to estimate the demodulated PUSCH for the fourth PUSCH transmission 420-4.

[0064] To improve channel estimation, the base station can instruct (e.g., guide) the UE to apply (or perform) DMRS bundling of PUSCHs (sometimes referred to as PUSCH DMRS bundling). When DMRS bundling is applied or performed, the base station can perform joint channel estimation (sometimes referred to as coherent channel estimation or cross-slot channel estimation) for different PUSCH transmissions, which improves the accuracy of channel estimation and thus improves performance. For example, using DMRS bundling, the base station can use multiple DMRS corresponding to multiple PUSCH transmissions (e.g., a demodulated PUSCH transmission and one or more other PUSCH transmissions) to perform channel estimation for demodulation of PUSCH transmissions. In some examples, at least one of the DMRS for channel estimation of PUSCH transmissions is transmitted in a different time-domain resource than the PUSCH transmission (e.g., a different time slot or a different mini-time slot). Therefore, DMRS transmission using DMRS bundling can be referred to as cross-slot DMRS transmission.

[0065] refer to Figure 4 When DMRS bundling is performed, the base station can use the first DMRS 410-1 to perform joint channel estimation for the first PUSCH transmission 420-1, and use at least one of the second DMRS 410-2, the third DMRS 410-3, or the fourth DMRS 410-4 to estimate the demodulated PUSCH for the first PUSCH transmission 420-1. The base station can perform joint channel estimation for the second, third, or fourth PUSCH transmissions in a similar manner, such as by using the corresponding DMRS and one or more other DMRSs. Different PUSCH transmissions in the first, second, third, and fourth PUSCH transmissions can be different repetitions of the same PUSCH transmission (e.g., on multiple time slots of PUSCH repetition type A or in the same time slot of PUSCH repetition type B), or they can be different PUSCH transmissions carrying different transport blocks.

[0066] For accurate joint estimation of PUSCH transmissions using multiple DMRSs to be possible, the multiple DMRSs (and their corresponding PUSCH transmissions) need to be phase-coherent with each other. Phase coherence is sometimes also referred to as phase continuity. Therefore, when a UE performs DMRS bundling for multiple PUSCH transmissions, the UE must maintain phase coherence (or phase continuity) across the multiple PUSCH transmissions (e.g., across PUSCH symbols transmitted within a PUSCH transmission) so that the base station can obtain accurate joint channel estimation for the multiple PUSCH transmissions. In some examples, the first and second PUSCH transmissions are phase-coherent or phase-continuous if the start phase of the radio wave used for the second PUSCH transmission is the same as the end phase of the radio wave used for the first PUSCH transmission. For example, if the phase difference between the first radio wave of the first PUSCH transmission and the second radio wave of the second PUSCH transmission is constant, then the first and second PUSCH transmissions will be phase-coherent or phase-continuous. Conversely, if the phase difference between the first radio wave transmitted by the first PUSCH and the second radio wave transmitted by the second PUSCH changes or is random, then the first PUSCH transmission and the second PUSCH transmission will not have phase coherence or phase continuity.

[0067] Changes in transmission parameters between two PUSCH transmissions can lead to phase discontinuities (lack of phase coherence) between them. For example, if the UE uses different frequency resource allocations between the two PUSCH transmissions, uses different transmit powers for the two PUSCH transmissions, or uses different uplink beams to transmit the two PUSCH transmissions, and other examples, the two PUSCH transmissions may not be phase coherent with each other. As another example, if the two PUSCH transmissions are discontinuous in time resource allocation, in some examples, the two PUSCH transmissions may not be phase coherent with each other. For example, if there is a large (e.g., greater than a threshold) time gap between the two PUSCH transmissions, the two PUSCH transmissions may not be phase coherent with each other. For example, another uplink transmission (on another channel, such as a PUCCH transmission, or another reference signal, such as an SRS) may be transmitted between the two PUSCH transmissions (e.g., in a time gap), thus making the two PUSCH transmissions not phase coherent with each other. As another example, downlink transmissions (e.g., PDCCH transmissions, PDSCH transmissions, SSB, or CSI-RS) can be received between two PUSCH transmissions, thus making the two PUSCH transmissions non-phase-coherent with each other.

[0068] In some examples, the base station may signal to the UE whether to enable DMRS bundling for PUSCH transmissions (sometimes referred to as PUSCH DMRS bundling), such as using Radio Resource Control (RRC) messages, DCI, or Media Access Control (MAC) Control Elements (CE) (collectively referred to as MAC-CE). In some examples, the base station may instruct the UE to apply DMRS bundling to PUSCH transmissions that meet a set of conditions (e.g., one or more conditions). The set of conditions may relate to whether the UE is able to maintain phase coherence across PUSCH transmissions, such as whether PUSCH transmissions use the same frequency resource allocation, whether they use the same transmit power, whether they use the same beam, or whether they are transmitted continuously in time (or within a threshold time amount, or without other interference to uplink or downlink transmissions), and other examples. If both the UE and the base station can explicitly determine whether the condition set is satisfied, enabling DMRS bundling via base station signaling can be used by the UE to determine when to apply PUSCH DMRS bundling, and by the base station to determine when to use the bundled DMRS to perform joint channel estimation of PUSCH, as well as for those determinations that will be explicitly applied to the same DMRS and the corresponding PUSCH transmission.

[0069] However, in some scenarios, the base station cannot explicitly determine whether the set of conditions for PUSCH DMRS bundling is met. For example, the UE determines the transmit power for uplink power control based at least in part on the Path Loss Reference Signal (PL-RS) measured by the UE. If the path loss value determined by the UE (at least in part based on the PL-RS) changes between two PUSCH transmissions, the UE can use different transmit powers to transmit those two PUSCH transmissions. However, the base station may not receive information indicating changes to the PL-RS measurement by the UE, the path loss value determined by the UE, or the transmit power used by the UE. As a result, when two PUSCH transmissions are not actually phase-coherent (because the two PUSCH transmissions are transmitted using different transmit powers), the base station may assume that the two PUSCH transmissions are phase-coherent (and are transmitted using the same transmit power). This can lead to communication errors, inaccurate channel estimation by the base station, or failure of the base station to properly demodulate PUSCH transmissions, among other examples. As another example, a UE may send one or more uplink transmissions (e.g., to another base station) between two PUSCH transmissions, may receive one or more downlink transmissions (e.g., from another base station) between two PUSCH transmissions, or may send or receive one or more sidelink communications (e.g., from another UE) between two PUSCH transmissions, which may disrupt the phase continuity between the two PUSCH transmissions. The base station may not receive information indicating this intervening communication and the resulting phase discontinuity between the two PUSCH transmissions, and may incorrectly assume phase coherence between the two PUSCH transmissions, leading to errors and inefficiencies as indicated above.

[0070] Various aspects typically involve enabling the UE to use coherence indicators to indicate or control PUSCH DMRS bundling. Some aspects more specifically involve UE transmissions that indicate to the base station whether different PUSCH transmissions are phase-coherent with each other for PUSCH DMRS bundling. In some aspects, the UE can transmit the coherence indicator of the PUSCH transmission in a UCI multiplexed with the PUSCH transmission, which enables implicit indications of the PUSCH transmissions to which the coherence indicator is applied. In some aspects, the coherence indicator is a single bit to save network resource overhead or memory resources.

[0071] Specific aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some examples, the described techniques can be used to provide a clear indication of whether different PUSCH transmissions are phase-coherent with each other. As a result, the base station can correctly determine when to use multiple DMRSs to perform joint channel estimation for PUSCH transmissions, thereby improving the accuracy of channel estimation, reducing communication errors, and improving demodulation of PUSCH transmissions.

[0072] Figure 5 This is a diagram illustrating example 500 associated with a coherence indication for DMRS bundling according to this disclosure. Figure 5 As shown, base station 110 and UE 120 can communicate with each other.

[0073] like Figure 5 As shown, base station 110 can send configuration 505 to UE 120. Configuration 505 can instruct UE 120 to apply DMRS bundling (sometimes referred to as PUSCH DMRS bundling) to PUSCH transmission. For example, configuration 505 can instruct that PUSCH DMRS bundling is enabled for UE 120. In some aspects, UE 120 can send a capability report indicating that UE 120 is capable of PUSCH DMRS bundling, and UE 120 can receive configuration 505 based at least in part on this capability report. Additionally or alternatively, UE 120 can send a capability report indicating that UE 120 is capable of supporting the transmission of coherence indications for PUSCH DMRS bundling (described in more detail below), and UE 120 can receive configuration 505 based at least in part on this capability report. In some aspects, UE 120 can receive configuration 505 in an RRC message, such as an RRC configuration message or an RRC reconfiguration message. If DMRS bundling is applied to a set of PUSCH transmissions, the UE must maintain phase coherence (or phase continuity) across the set of transmissions for the base station 110 to perform joint channel estimation across the set of transmissions, as described above. Figure 4 A more detailed description. (The above is combined with...) Figure 4 Additional details about the PUSCH DMRS bundle are also described.

[0074] like Figure 5 As further illustrated, UE 120 can send multiple PUSCH transmissions 510 to base station 110 over time (in different time-domain resources, such as time slots, mini-time slots, or symbols), shown as a first PUSCH transmission 510-1 (“PUSCHA”), a second PUSCH transmission 510-2 (“PUSCH B”), and a third PUSCH transmission 510-3 (“PUSCH C”). Although Figure 5Three PUSCH transmissions 510 are shown, but various aspects may include different numbers of PUSCH transmissions 510. As further shown, each PUSCH transmission 510 may be associated with DMRS 515, shown as a first DMRS 515-1 (“DMRS A”) corresponding to PUSCH A, a second DMRS 515-2 (“DMRS B”) corresponding to PUSCH B, and a third DMRS 515-3 (“DMRS C”) corresponding to PUSCH C. In Example 500, DMRS 515 and the corresponding PUSCH transmissions 510 are transmitted in the same time slot, and DMRS 515 is transmitted in a subset of the resource elements of that time slot (such as according to DMRS configuration). For example, DMRSA and PUSCH A are transmitted in the first time slot, DMRS B and PUSCH B are transmitted in the second time slot, and DMRS C and PUSCH C are transmitted in the third time slot.

[0075] As shown, UE 120 can transmit a UCI 520 in conjunction with each PUSCH transmission 510, shown as a first UCI 520-1 (“UCI A”) corresponding to PUSCH A, a second UCI 520-2 (“UCI B”) corresponding to PUSCH B, and a third UCI 520-3 (“UCI C”) corresponding to PUSCH C. In some aspects, the UCI 520 is multiplexed with the PUSCH transmission 510 associated with the UCI 520 (e.g., the PUSCH transmission 510 whose application is carried in the UCI 520). For example, in some aspects, the PUSCH transmission 510 may be rate-matched around the UCI 520. In some other aspects, the PUSCH transmission 510 may be punctured with the UCI 520.

[0076] As shown, UCI 520 may include coherence indicators 525, shown as a first coherence indicator 525-1 (“Coherence Indicator A”) included in UCI A, a second coherence indicator 525-2 (“Coherence Indicator B”) included in UCI B, and a third coherence indicator 525-3 (“Coherence Indicator C”) included in UCI C. The coherence indicators 525 may indicate whether the PUSCH transmission 510 corresponding to the coherence indicator 525 is coherent with one or more other PUSCH transmissions (e.g., has phase coherence with them). The PUSCH transmission 510 corresponding to coherence indication 525 is sometimes referred to herein as a “primary PUSCH transmission,” and one or more other PUSCH transmissions are sometimes referred to herein as “(one or more) secondary PUSCH transmissions.” Therefore, coherence indication 525 may indicate whether the primary PUSCH transmission (in conjunction with and with respect to the UCI 520 transmission including coherence indication 525) has phase coherence with one or more secondary PUSCH transmissions (in addition to the primary PUSCH transmission). The coherence indication may also be referred to as a “bundling indication.” In some aspects, the primary PUSCH transmission and (one or more) secondary PUSCH transmissions are different PUSCH transmissions carrying different Transport Blocks (TBs). Additionally or alternatively, the primary PUSCH transmission and (one or more) secondary PUSCH transmissions may be different repetitions of a particular PUSCH transmission (e.g., carrying the same TB). In some aspects, UE 120 may transmit the coherence indication at least in part based on a capability report stating that UE 120 supports coherence indications for PUSCH DMRS bundling. Additionally or alternatively, UE 120 may receive from base station 110 (e.g., in configuration, RRC message, DCI, or MAC-CE) an instruction to send a coherence indication for PUSCH DMRS binding, and UE 120 may send the coherence indication at least in part based on the instruction.

[0077] A coherence indicator may include one or more bits indicating that the primary PUSCH transmission is coherent with the secondary PUSCH transmissions. In some aspects, the coherence indicator consists of only a single bit to save signaling overhead. In this example, a first value of the bit (e.g., 1) may indicate that the primary PUSCH transmission has phase continuity with one or more secondary PUSCH transmissions, and a second value of the bit (e.g., 0) may indicate that the primary PUSCH transmission does not have phase continuity with one or more secondary PUSCH transmissions.

[0078] Indications for specific secondary PUSCH transmissions to which a coherence indicator is applied may be stored in the memory of UE 120 (e.g., at least in part based on a wireless communication standard), or may be signaled to UE 120 by base station 110 (e.g., in configuration, in DCI, or in MAC-CE). In some aspects, the coherence indicator is applied to a single PUSCH transmission that immediately precedes the primary PUSCH transmission in the time domain. For example, the coherence indicator may be applied to a previous PUSCH transmission that occurs before (e.g., immediately before) the primary PUSCH transmission (e.g., in the preceding PUSCH timing before the primary PUSCH transmission, no intervening PUSCH transmission by UE 120). In this example, when the coherence indicator is a single bit, a first value of the single bit may indicate that the primary PUSCH transmission is coherent with the preceding PUSCH transmission, and a second value of the bit may indicate that the primary PUSCH transmission is incoherent with the preceding PUSCH transmission. When the coherence indication is applied to one or more PUSCH transmissions that occur before the main PUSCH transmission, this provides UE 120 with greater flexibility (compared to when the coherence indication is applied to one or more PUSCH transmissions that occur after the main PUSCH transmission), because UE 120 is not required to commit to maintaining phase continuity for future PUSCH transmissions.

[0079] In some aspects, the coherence indication is applied to a single PUSCH transmission that immediately follows the main PUSCH transmission in the time domain. For example, the coherence indication can be applied to the next PUSCH transmission that occurs after the main PUSCH transmission (e.g., immediately following the main PUSCH transmission) (e.g., in the next PUSCH timing after the main PUSCH transmission, there is no intervening PUSCH transmission by UE 120). In this example, when the coherence indication is a single bit, a first value of the single bit can indicate that the main PUSCH transmission and the next PUSCH transmission are coherent, and a second value of the bit can indicate that the main PUSCH transmission and the next PUSCH transmission are incoherent. When the coherence indication is applied to one or more PUSCH transmissions that occur after the main PUSCH transmission, this reduces the decoding complexity for base station 110 (compared to when the coherence indication is applied to one or more PUSCH transmissions that occur before the main PUSCH transmission), because base station 110 will not need to perform channel estimation twice. For example, if a coherence indication is applied to one or more PUSCH transmissions occurring prior to the main PUSCH transmission, base station 110 may need to perform a first channel estimation to decode the UCI, determine whether joint estimation is to be performed for the PUSCH combined with the previous PUSCH transmission based at least in part on the coherence indication in the UCI, and then perform a second channel estimation to decode the PUSCH transmission (e.g., jointly or separately, depending on the coherence indication). However, performing two channel estimations is complicated when the coherence indication is absent. If the coherence indication is absent, it requires performing channel estimation twice for the PUSCH transmission (separate channel estimation and joint channel estimation), and decoding twice for the PUSCH transmission (and any accompanying UCI, if present) (using separate channel estimation and joint channel estimation).

[0080] In some aspects, coherence indication is applied to a set of PUSCH transmissions (one or more PUSCH transmissions) occurring within a time window. The indication defining the time window may be stored in the memory of UE 120 (e.g., at least in part based on a wireless communication standard), or may be signaled to UE 120 by base station 110 (e.g., in configuration, in DCI, or in MAC-CE). In some aspects, the time window may be indicated by offset, periodicity, or both offset and periodicity. In some aspects, the time window is defined relative to a primary PUSCH transmission or a UCI multiplexed with a primary PUSCH transmission. For example, a primary PUSCH transmission or UCI may define the start of the time window (e.g., the start of the time window may be the initial symbol or the final symbol of the primary PUSCH transmission or UCI), and the time window may have a length defined by a number of time-domain resources (such as a number of symbols, a number of mini-slots, or a number of slots, and other examples) following the primary PUSCH transmission or UCI. As another example, the primary PUSCH transmission or UCI may define the end of a time window (e.g., the end of the time window may be the initial symbol or the final symbol of the primary PUSCH transmission or UCI), and the time window may have a length defined by a certain number of time-domain resources preceding the primary PUSCH transmission or UCI. As another example, the primary PUSCH transmission or UCI may occur within a time window (e.g., neither at the beginning nor the end of the time window), and the time window may have a length defined by a first number of time-domain resources preceding the primary PUSCH transmission or UCI and a second number of time-domain resources following the primary PUSCH transmission or UCI. The first and second numbers may be the same or different. In this example, when the coherence indication is a single bit, the first value of that single bit may indicate that the primary PUSCH transmission is coherent with all (secondary) PUSCH transmissions occurring within the time window, and the second value of that bit may indicate that the primary PUSCH transmission is incoherent with all (secondary) PUSCH transmissions occurring within the time window.

[0081] In some aspects, the coherence indication comprises multiple bits. In this example, each bit (of the multiple bits) may correspond to a different secondary PUSCH transmission, and the value of the bit may indicate whether the primary PUSCH transmission has phase continuity with the secondary PUSCH transmission corresponding to that bit. For example, a coherence indication bit string of "101" may indicate that the primary PUSCH transmission has phase coherence with the first PUSCH transmission (corresponding to the first "1"), no phase coherence with the second PUSCH transmission (corresponding to "0"), and phase coherence with the third PUSCH transmission (corresponding to the second "1"). In some aspects, the order of the bits in the bit string may correspond to the order in which the secondary PUSCH transmissions occur in the time domain. In some aspects, the initial bit in the bit string may correspond to a PUSCH transmission that occurs immediately after the primary PUSCH transmission (and, for example, all bits in the bit string correspond to a PUSCH transmission that occurs after the primary PUSCH transmission). Alternatively, the last bit in the bit string may correspond to a PUSCH transmission that occurs immediately before the main PUSCH transmission (and, for example, all bits in the bit string correspond to a PUSCH transmission that occurs before the main PUSCH transmission). Alternatively, one or more bits in the bit string may correspond to one or more PUSCH transmissions that occur before the main PUSCH transmission, and one or more other bits in the bit string may correspond to one or more PUSCH transmissions that occur after the main PUSCH transmission.

[0082] In some aspects, coherence indicators can be applied to absolute preceding PUSCH transmissions (no intervening PUSCH transmissions from the primary PUSCH transmission), absolute subsequent PUSCH transmissions (no intervening PUSCH transmissions from the primary PUSCH transmission), or all PUSCH transmissions within a time window, regardless of the transmission parameters associated with those PUSCH transmissions. Alternatively, coherence indicators can be applied to preceding PUSCH transmissions that satisfy a set of conditions (e.g., PUSCH transmissions that occur temporally before the primary PUSCH transmission and satisfy the set of conditions), subsequent PUSCH transmissions that satisfy the set of conditions (e.g., PUSCH transmissions that occur temporally after the primary PUSCH transmission and satisfy the set of conditions), or only PUSCH transmissions within a time window that satisfy the set of conditions. The set of conditions (one or more conditions) can relate to whether the transmission parameters of a secondary PUSCH transmission are the same as the corresponding transmission parameters of the primary PUSCH transmission. Transmission parameters can include, for example, resource block (RB) allocation, uplink beamforming, transmission power, or precoder (e.g., precoding matrix). For example, coherence indication can be applied to a secondary PUSCH transmission that has the same RB allocation as the primary PUSCH transmission, is transmitted on the same uplink beam as the primary PUSCH transmission, is transmitted with the same transmit power as the primary PUSCH transmission, has the same precoding as the primary PUSCH transmission (e.g., is transmitted using the same precoder), or a combination thereof.

[0083] In some aspects, the absolute value of a bit in a coherence indicator can indicate whether the corresponding secondary PUSCH transmission is coherent with the primary PUSCH transmission (e.g., independent of bit values ​​in any other coherence indicator). In this example, a first bit value (e.g., 1) can indicate that the primary and secondary PUSCH transmissions have phase continuity, and a second bit value (e.g., 0) can indicate that the primary and secondary PUSCH transmissions do not have phase continuity, independent of bit values ​​in any other coherence indicator.

[0084] Alternatively, the relative value of a bit in a coherence indicator to a bit value in another coherence indicator can indicate whether the corresponding secondary PUSCH transmission is coherent with the primary PUSCH transmission. In this example, the bit value is used to indicate the switching of phase coherence. For example, if the bit value in the coherence indicator of the primary PUSCH transmission is the same as the bit value in the preceding (or following) coherence indicator associated with the secondary PUSCH transmission, this can indicate that the primary PUSCH transmission and the secondary PUSCH transmission are coherent. Conversely, if the bit value in the coherence indicator of the primary PUSCH transmission is different from the bit value in the preceding (or following) coherence indicator associated with the secondary PUSCH transmission, this can indicate that the primary PUSCH transmission and the secondary PUSCH transmission are incoherent.

[0085] In some aspects, if the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message, Channel State Information (CSI), or Scheduling Request (SR) is present in the UCI multiplexed with the primary PUSCH transmission, the UE 120 can append the coherence indication of the primary PUSCH transmission to the HARQ-ACK message, CSI, or SR to save signaling overhead. If the HARQ-ACK message, CSI, and SR are not present in the UCI multiplexed with the primary PUSCH transmission, the UE 120 can independently transmit the coherence indication of the primary PUSCH transmission in the UCI multiplexed with the primary PUSCH transmission (e.g., the UCI may consist only of the coherence indication and not of any other information).

[0086] like Figure 5 As further illustrated, base station 110 can perform joint channel estimation or separate channel estimation at least partially based on a coherence indication. For example, if the coherence indication indicates that the primary PUSCH transmission and the secondary PUSCH transmission are coherent, base station 110 can perform joint channel estimation for the primary PUSCH transmission and the secondary PUSCH transmission (or a group of secondary PUSCH transmissions, depending on one or more coherence indications). Conversely, if the coherence indication indicates that the primary PUSCH transmission and the secondary PUSCH transmission are incoherent, base station 110 can separate the joint channel estimation for the primary PUSCH transmission from the channel estimation performed for the secondary PUSCH transmission. Therefore, base station 110 can determine whether to perform separate joint channel estimation or joint channel estimation for the primary PUSCH transmission at least partially based on the coherence indication. Furthermore, if base station 110 determines to perform joint channel estimation for primary PUSCH transmission, base station 110 can determine which secondary PUSCH transmissions are coherent with the primary PUSCH transmission for performing joint channel estimation at least in part based on a coherence indication associated with the primary PUSCH transmission (and in some respects, one or more other coherence indications).

[0087] By enabling UE 120 to use coherence indication to indicate or control PUSCH DMRS bundling, the aspects and apparatus described herein can be used to provide a clear indication of whether different PUSCH transmissions are phase-coherent with each other. As a result, base station 110 can correctly determine when to use multiple DMRSs to perform joint channel estimation for PUSCH transmission, thereby improving the accuracy of channel estimation, reducing communication errors, and improving demodulation of PUSCH transmission.

[0088] Figure 6 This is a diagram illustrating several examples of coherence indications associated with DMRS bundling according to this disclosure. Figure 6 Different examples are shown where the coherence indicator refers to the previous PUSCH send or the next PUSCH send, and where the coherence indicator uses absolute or relative values ​​to indicate coherence.

[0089] In the first example 605, the coherence indication uses the absolute value of a single bit included in the PUSCH transmission to indicate whether the primary PUSCH transmission is coherent with the immediately preceding PUSCH transmission. In this example, PUSCH E is coherent with PUSCH D because PUSCH E is multiplexed with a UCI that includes a coherence indication of 1 (indicating phase coherence); PUSCH F is coherent with PUSCH E because PUSCH F is multiplexed with a UCI that includes a coherence indication of 1; and PUSCH G is coherent with PUSCH F because PUSCH G is multiplexed with a UCI that includes a coherence indication of 1. Therefore, PUSCH D, PUSCH E, PUSCH F, and PUSCH G all have phase coherence with each other, and base station 110 will use the PUSCH DMRS included in these PUSCHs to perform joint channel estimation. Continuing the example, PUSCHH and PUSCH G are incoherent because PUSCH H is multiplexed with a UCI that includes a coherence indicator with a value of 0 (indicating a lack of coherence). PUSCH I and PUSCH H are coherent because PUSCH I is multiplexed with a UCI that includes a coherence indicator with a value of 1. Therefore, PUSCH H and PUSCH I have phase coherence with each other, and base station 110 will use the PUSCH DMRS included in these PUSCHs to perform joint channel estimation.

[0090] In the second example 610, the coherence indicator uses the relative value of a single bit included in the PUSCH transmission to indicate whether the main PUSCH transmission is coherent with the immediately preceding PUSCH transmission. In this example, PUSCH E and PUSCH D are incoherent because PUSCH E is multiplexed with a UCI including a coherence indicator of value 1, and PUSCH D is multiplexed with a UCI including a coherence indicator of value 0. Since the coherence indicator value changes from PUSCH D to PUSCH E, these two PUSCH transmissions are incoherent. Continuing the example, PUSCH E, PUSCH F, and PUSCH G are all coherent with each other because all three PUSCH transmissions are multiplexed with a UCI including a coherence indicator of value 1, and the value of the coherence indicator remains unchanged between consecutive PUSCH transmissions. Continuing the example, PUSCH H and PUSCH G are incoherent because the value of the coherence indicator changes from 1 associated with PUSCH G to 0 associated with PUSCH H. Similarly, PUSCH I and PUSCH H are unrelated because the value of the coherence indicator changes from 0, which is related to PUSCH H, to 1, which is related to PUSCH I.

[0091] In the third example 615, the coherence indication uses the absolute value of a single bit included in the PUSCH transmission to indicate whether the main PUSCH transmission is coherent with the immediately following (or next) PUSCH transmission. In this example, PUSCH E and PUSCH D are incoherent because PUSCH D is multiplexed with a UCI that includes a coherence indication of 0 (indicating lack of coherence). Continuing the example, PUSCH F and PUSCH E are coherent because PUSCH E is multiplexed with a UCI that includes a coherence indication of 1 (indicating phase coherence), PUSCH G and PUSCH F are coherent because PUSCH F is multiplexed with a UCI that includes a coherence indication of 1, and PUSCH H and PUSCH G are coherent because PUSCH G is multiplexed with a UCI that includes a coherence indication of 1. Therefore, PUSCH E, PUSCH F, PUSCH G, and PUSCH H are all phase coherent with each other, and base station 110 will use the PUSCH DMRS included in these PUSCHs to perform joint channel estimation. Continuing the example, PUSCH I and PUSCH H are incoherent because PUSCH H is multiplexed with a UCI that includes a coherence indication of 0.

[0092] In Example 620, the coherence indicator uses the relative value of a single bit included in the PUSCH transmission to indicate whether the main PUSCH transmission is coherent with the immediately following (or next) PUSCH transmission. In this example, it is assumed that the PUSCH transmission immediately preceding PUSCH D is multiplexed with a UCI including a coherence indicator of 0. Because PUSCH D is also multiplexed with a UCI including a coherence indicator of 0, this indicates that the next PUSCH after PUSCH D (PUSCH E in this example) is coherent with PUSCH D. A change in the coherence value from PUSCH D to PUSCH E (from 0 to 1) indicates that the next PUSCH after PUSCH E (PUSCH F in this example) is incoherent with PUSCH E. Continuing with the example, PUSCH F, PUSCH G, and PUSCH H are coherent with each other because the coherence indicator value remains constant until PUSCH H, which indicates that the next PUSCH after PUSCH H (PUSCH I in this example) is not coherent with PUSCH H.

[0093] Figure 7 This is a flowchart illustrating an example procedure 700 performed by a UE supporting a coherence indication for DMRS bundling, according to the present disclosure. Example procedure 700 is an example of an operation performed by a UE (e.g., UE 120) associated with a coherence indication for demodulating reference signal bundling.

[0094] like Figure 7 As shown, in some aspects, process 700 may include: receiving an instruction (e.g., guiding) the UE to apply DMRS bundling to a configuration for PUSCH transmission, wherein the UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions (box 710). For example, the UE (such as by using...) Figure 9 The receiving component 902 depicted can receive, as described above, a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions. In some aspects, the UE can maintain phase coherence across PUSCH transmissions with DMRS bundling applied to enable joint channel estimation across multiple PUSCH transmissions as described above.

[0095] like Figure 7As further illustrated, in some aspects, process 700 may include transmitting a UCI including a coherence indication, at least in part based on the configuration, wherein the UCI is multiplexed with a PUSCH transmission among a plurality of PUSCH transmissions to which DMRS is applied, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among a plurality of PUSCH transmissions transmitted by the UE (box 720). For example, the UE (such as by using...) Figure 9 The transmitting component 906 described herein can transmit a UCI including a coherence indication based at least in part on this configuration, as described above. In some aspects, as described above, the UCI is multiplexed with a PUSCH transmission among multiple PUSCH transmissions that are bundled with DMRS. In some aspects, as described above, the coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among multiple PUSCH transmissions transmitted by the UE.

[0096] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below or in conjunction with one or more other process descriptions elsewhere herein.

[0097] In the first additional aspect, one or more other PUSCH transmissions include a single PUSCH transmission immediately preceding the PUSCH transmission, and a coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately preceding the PUSCH transmission.

[0098] In the second additional aspect, either alone or in combination with the first aspect, one or more other PUSCH transmissions include a single PUSCH transmission immediately following a PUSCH transmission, and a coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately following the PUSCH transmission.

[0099] In the third additional aspect, either alone or in combination with one or more of the first and second aspects, one or more other PUSCH transmissions occur within a time window, and a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions occurring within that time window.

[0100] In the fourth additional aspect, either alone or in combination with one or more of the first to third aspects, process 700 includes receiving (such as by using...) Figure 9 The receiving component 902 depicted in the image indicates the time window.

[0101] In the fifth additional aspect, either alone or in combination with one or more of the first to fourth aspects, the time window is limited relative to the PUSCH transmission.

[0102] In the sixth additional aspect, either alone or in combination with one or more of the first to fifth aspects, one or more other PUSCH transmissions satisfy a set of conditions relative to the PUSCH transmission, and a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions that satisfy the set of conditions.

[0103] In the seventh additional aspect, either alone or in combination with one or more of the first to sixth aspects, the set of conditions includes at least one of the following: one or more other PUSCH transmissions have the same resource block allocation as the PUSCH transmission; one or more other PUSCH transmissions are transmitted on the same uplink beam as the PUSCH transmission; one or more other PUSCH transmissions are transmitted with the same transmit power as the PUSCH transmission; one or more other PUSCH transmissions have the same precoding as the PUSCH transmission or a combination thereof.

[0104] In the eighth additional aspect, either alone or in combination with one or more of the first to seventh aspects, the coherence indication consists of a single bit.

[0105] In the ninth additional aspect, either alone or in combination with one or more of the first to eighth aspects, the absolute value of the coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0106] In the tenth additional aspect, either alone or in combination with one or more of the first to ninth aspects, the relative value of the coherence indication to the value of another transmitted coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0107] In the eleventh additional aspect, either alone or in combination with one or more of the first to tenth aspects, if at least one of the HARQ-ACK information, CSI, or SR is present in the UCI, then a coherence indication is attached to at least one of the HARQ-ACK information, CSI, or SR; or if at least one of the HARQ-ACK information, CSI, or SR is not present in the UCI, then the coherence indication is transmitted independently of the HARQ-ACK information, CSI, or SR.

[0108] In the twelfth additional aspect, either alone or in combination with one or more of the first to eleventh aspects, PUSCH transmission performs rate matching around the UCI.

[0109] In the thirteenth additional aspect, either alone or in combination with one or more of the first to twelfth aspects, PUSCH sends a punch using UCI.

[0110] In the fourteenth additional aspect, either alone or in combination with one or more of the first to thirteenth aspects, a PUSCH transmission and one or more other PUSCH transmissions include at least one of the following: different PUSCHs carrying different transport blocks, different receptions of a particular PUSCH transmission, or combinations thereof.

[0111] In the fifteenth additional aspect, either alone or in combination with one or more of the first to fourteenth aspects, process 700 includes sending (such as by using...) Figure 9 The transmitting component 906 depicted in the figure indicates the UE's ability to transmit a coherence indication for DMRS bundling, and transmitting a UCI including a coherence indication includes transmitting a UCI including a coherence indication based at least in part on the indication that the UE supports the ability to transmit a coherence indication for DMRS bundling.

[0112] In the sixteenth additional aspect, either alone or in combination with one or more of the first to fifteenth aspects, process 700 includes receiving (such as by using...) Figure 9 The receiving component 902 depicted in the figure transmits an instruction for a coherence indication for DMRS binding, and transmitting a UCI including a coherence indication includes transmitting a UCI including a coherence indication based at least in part on the instruction for transmitting a coherence indication for DMRS binding.

[0113] although Figure 7 An example box of process 700 is shown, but in some aspects, process 700 may include, compared to Figure 7 Additional boxes, fewer boxes, different boxes, or boxes with different arrangements of those boxes depicted in the diagram. Additionally or alternatively, two or more boxes in the process 700 can be executed in parallel.

[0114] Figure 8 This is a flowchart illustrating an example process 800 performed by a base station supporting a coherence indication for DMRS bundling, according to the present disclosure. Example process 800 is an example of an operation performed by a base station (e.g., base station 110) associated with a coherence indication for demodulation reference signal bundling.

[0115] like Figure 8 As shown, in some aspects, process 800 may include sending a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions via the base station (box 810). For example, the base station (such as by using...) Figure 10The transmitting component 1006 described herein can transmit a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions as described above. In some aspects, as described above, the UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions via the base station.

[0116] like Figure 8 As further illustrated, in some aspects, process 800 may include receiving a UCI including a coherence indication based at least in part on the configuration, wherein the UCI is multiplexed with a PUSCH transmission in a plurality of PUSCH transmissions with DMRS binding applied, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions in a plurality of PUSCH transmissions transmitted by the UE (block 820). For example, a base station (such as by using...) Figure 10 The receiving component 1002 depicted can receive a UCI including a coherence indication based at least in part on this configuration, as described above. In some aspects, as described above, the UCI is multiplexed with a PUSCH transmission among multiple PUSCH transmissions that are bundled with DMRS. In some aspects, as described above, the coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among multiple PUSCH transmissions transmitted by the UE.

[0117] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below or in conjunction with one or more other process descriptions elsewhere herein.

[0118] In the first additional aspect, process 800 includes performing joint channel estimation for PUSCH transmission and one or more other PUSCH transmissions (such as by using coherence indication) based at least in part on coherence indication. Figure 10 The channel estimation component 1010 is depicted in the figure.

[0119] In the second additional aspect, either alone or in combination with the first aspect, process 800 includes performing a separate channel estimation for PUSCH transmission based at least in part on a coherence indication (such as by using...). Figure 10 The channel estimation component 1010 is depicted in the figure.

[0120] In the third additional aspect, either alone or in combination with one or more of the first and second aspects, process 800 includes determining (such as by using...) Figure 10 The determination component 1012 depicted in the figure determines whether it performs joint channel estimation or separate channel estimation for PUSCH transmission based at least in part on a coherence indication.

[0121] In the fourth additional aspect, either alone or in combination with one or more of the first to third aspects, one or more other PUSCH transmissions include a single PUSCH transmission immediately preceding the PUSCH transmission, and a coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately preceding the PUSCH transmission.

[0122] In the fifth additional aspect, either alone or in combination with one or more of the first to fourth aspects, one or more other PUSCH transmissions include a single PUSCH transmission immediately following a PUSCH transmission, and a coherence indicator indicates whether a PUSCH transmission is coherent with a single PUSCH transmission immediately following a PUSCH transmission.

[0123] In the sixth additional aspect, either alone or in combination with one or more of the first to fifth aspects, one or more other PUSCH transmissions occur within a time window, and a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions occurring within the time window.

[0124] In the seventh additional aspect, either alone or in combination with one or more of the first to sixth aspects, process 800 includes sending (such as by using...) Figure 10 The sending component 1006 depicted in the figure indicates the time window.

[0125] In the eighth additional aspect, either alone or in combination with one or more of the first to seventh aspects, the time window is limited relative to the PUSCH transmission.

[0126] In the ninth additional aspect, either alone or in combination with one or more of the first to eighth aspects, one or more other PUSCH transmissions satisfy a set of conditions relative to the PUSCH transmission, and a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions that satisfy the set of conditions.

[0127] In the tenth additional aspect, either alone or in combination with one or more of the first to ninth aspects, the set of conditions includes at least one of the following: one or more other PUSCH transmissions have the same resource block allocation as the PUSCH transmission; one or more other PUSCH transmissions are transmitted on the same uplink beam as the PUSCH transmission; one or more other PUSCH transmissions are transmitted with the same transmit power as the PUSCH transmission; one or more other PUSCH transmissions have the same precoding as the PUSCH transmission; or a combination thereof.

[0128] In the eleventh additional aspect, either alone or in combination with one or more of the first to tenth aspects, the coherence indication consists of a single bit.

[0129] In the twelfth additional aspect, either alone or in combination with one or more of the first to eleventh aspects, the absolute value of the coherence indicator indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0130] In the thirteenth additional aspect, either alone or in combination with one or more of the first to twelfth aspects, the relative value of the coherence indication to the value of another transmitted coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0131] In the fourteenth additional aspect, either alone or in combination with one or more of the first to thirteenth aspects, if at least one of the HARQ-ACK information, CSI, or SR is present in the UCI, then a coherence indication is attached to at least one of the HARQ-ACK information, CSI, or SR; or if at least one of the HARQ-ACK information, CSI, or SR is not present in the UCI, then the coherence indication is independent of the reception of the HARQ-ACK information, CSI, or SR.

[0132] In the fifteenth additional aspect, either alone or in combination with one or more of the first to fourteenth aspects, PUSCH transmission performs rate matching around the UCI.

[0133] In the sixteenth additional aspect, either alone or in combination with one or more of the first to fifteenth aspects, PUSCH sends a punch using UCI.

[0134] In the seventeenth additional aspect, either alone or in combination with one or more of the first to sixteenth aspects, a PUSCH transmission and one or more other PUSCH transmissions include at least one of the following: different PUSCHs carrying different transport blocks, different receptions of a particular PUSCH transmission, or combinations thereof.

[0135] In the eighteenth additional aspect, alone or in combination with one or more of the first to seventeenth aspects, process 800 includes receiving (such as by using...) Figure 10 The receiving component 1002 depicted in the figure indicates the UE's ability to transmit a coherence indication for DMRS bundling, and receiving a UCI including a coherence indication includes receiving a UCI including a coherence indication based at least in part on the indication that the UE supports the transmission of a coherence indication for DMRS bundling.

[0136] In the nineteenth additional aspect, alone or in combination with one or more of the first to eighteenth aspects, process 800 includes sending (such as by using...) Figure 10 The transmitting component 1006 depicted in the figure transmits an instruction for a coherence indication for DMRS binding, and receiving a UCI including a coherence indication includes receiving a UCI including a coherence indication based at least in part on the instruction for transmitting a coherence indication for DMRS binding.

[0137] although Figure 8 An example box of process 800 is shown, but in some aspects, process 800 may include, compared to Figure 8 Additional boxes, fewer boxes, different boxes, or boxes with different arrangements of those boxes depicted in the diagram. Additionally or alternatively, two or more boxes in the process 800 can be executed in parallel.

[0138] Figure 9 This is a block diagram of an example device 900 for wireless communication that supports coherence indication for DMRS bundling according to this disclosure. Device 900 may be a UE, or a UE may include device 900. In some aspects, device 900 includes a receiving component 902, a communication manager 904, and a transmitting component 906, which can communicate with each other (e.g., via one or more buses). As shown, device 900 can use the receiving component 902 and the transmitting component 906 to communicate with another device 908 (such as a UE, a base station, or another wireless communication device).

[0139] In some respects, device 900 can be configured to perform the functions described herein. Figures 5 to 6 One or more operations described herein. Additionally or alternatively, apparatus 900 may be configured to perform one or more processes described herein, such as Figure 7 The process 700. In some aspects, the apparatus 900 may include the above-described combination. Figure 2 One or more components of the UE described.

[0140] Receiver 902 may receive communications from device 908, such as reference signals, control information, data communications, or combinations thereof. Receiver 902 may provide the received communications to one or more other components of device 900, such as communication manager 904. In some aspects, receiver 902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples) and may provide the processed signals to one or more other components. In some aspects, receiver 902 may include the combinations described above. Figure 2The described UE includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0141] The transmitting component 906 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 908. In some aspects, the communication manager 904 can generate communications and provide the generated communications to the transmitting component 906 for transmission to the device 908. In some aspects, the transmitting component 906 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can transmit the processed signals to the device 908. In some aspects, the transmitting component 906 can include the combinations described above. Figure 2 The described UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 906 may be co-located with the receive component 902 in a transceiver.

[0142] Communication manager 904 may receive, or may cause receiving unit 902 to receive, a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions. Based at least in part on this configuration, communication manager 904 may transmit, or may cause transmitting unit 906 to transmit a UCI including a coherence indication, wherein the UCI is multiplexed with a PUSCH transmission among the multiple PUSCH transmissions with applied DMRS bundling, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE. In some aspects, communication manager 904 may perform one or more operations, which are described elsewhere herein as being performed by one or more components of communication manager 904.

[0143] Communication Manager 904 may include the above combined Figure 2 The described UE includes a controller / processor, memory, or a combination thereof. In some aspects, the communication manager 904 may include a set of components, such as phase continuity component 910, multiplexing component 912, or a combination thereof. Alternatively, the set of components may be separate from and distinct from the communication manager 904. In some aspects, one or more components in the set of components may include those combined as described above. Figure 2The described UE's controller / processor, memory, or a combination thereof, or may be implemented therein. Additionally or alternatively, one or more components of the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0144] The receiving unit 902 can receive a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions, wherein the UE applies phase coherence to multiple PUSCH transmissions bundled with DMRS to enable joint channel estimation across multiple PUSCH transmissions. The phase continuity unit 910 can be used by the UE to maintain phase continuity across multiple PUSCH transmissions. The transmitting unit 906 can transmit a UCI including a coherence indication, at least in part, based on this configuration, wherein the UCI is multiplexed with PUSCH transmissions among the multiple PUSCH transmissions with applied DMRS bundling, and wherein the coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE. The multiplexing unit 912 can be used by the UE to multiplex the UCI and the PUSCH transmissions.

[0145] The receiving unit 902 can receive an indication of a defined time window. The transmitting unit 906 can transmit an indication of the UE's ability to transmit a coherence indication for DMRS bundling, and can transmit a UCI including a coherence indication based at least in part on the indication of the UE's ability to transmit a coherence indication for DMRS bundling. The receiving unit 902 can receive an instruction to transmit a coherence indication for DMRS bundling. The transmitting unit 906 can transmit a UCI including a coherence indication based at least in part on the instruction to transmit a coherence indication for DMRS bundling.

[0146] Figure 9 The number and arrangement of components shown are provided as an example. In practice, compared to Figure 9 The components shown may have additional components, fewer components, different components, or components arranged differently. Furthermore, Figure 9 The two or more components shown can be implemented within a single component, or Figure 9 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 9 The collection of components (one or more components) shown can perform what is described as being made by Figure 9 Another set of components shown performs one or more functions.

[0147] Figure 10This is a block diagram of an example apparatus 1000 for wireless communication that supports coherence indication for DMRS bundling according to this disclosure. Apparatus 1000 may be a base station, or a base station may include apparatus 1000. In some aspects, apparatus 1000 includes a receiving component 1002, a communication manager 1004, and a transmitting component 1006, which may communicate with each other (e.g., via one or more buses). As shown, apparatus 1000 may use the receiving component 1002 and the transmitting component 1006 to communicate with another apparatus 1008 (such as a UE, a base station, or another wireless communication device).

[0148] In some respects, device 1000 can be configured to perform the functions described herein. Figures 5 to 6 One or more operations described herein. Additionally or alternatively, the apparatus 1000 may be configured to perform one or more processes described herein, such as Figure 8 The process 800. In some aspects, the apparatus 1000 may include the above-described combination. Figure 2 One or more components of the base station described.

[0149] Receiver 1002 may receive communications from device 1008, such as reference signals, control information, data communications, or combinations thereof. Receiver 1002 may provide the received communications to one or more other components of device 1000, such as communication manager 1004. In some aspects, receiver 1002 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples) and may provide the processed signals to one or more other components. In some aspects, receiver 1002 may include the combinations described above. Figure 2 The described base station includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0150] The transmitting component 1006 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1008. In some aspects, the communication manager 1004 can generate communications and provide the generated communications to the transmitting component 1006 for transmission to the device 1008. In some aspects, the transmitting component 1006 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can transmit the processed signals to the device 1008. In some aspects, the transmitting component 1006 can include the combinations described above. Figure 2The described base station includes one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof. In some aspects, the transmit component 1006 may be co-located with the receive component 1002 in a transceiver.

[0151] Communication manager 1004 may send, or may cause transmitting unit 1006 to send, a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions by the base station. Based at least in part on this configuration, communication manager 1004 may receive, or may cause receiving unit 1002 to receive, a UCI including a coherence indication, wherein the UCI is multiplexed with a PUSCH transmission among multiple PUSCH transmissions with applied DMRS bundling, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among multiple PUSCH transmissions transmitted by the UE. In some aspects, communication manager 1004 may perform one or more operations, which are described elsewhere herein as being performed by one or more components of communication manager 1004.

[0152] Communication Manager 1004 may include the above-mentioned combination Figure 2 The described base station includes a controller / processor, memory, scheduler, communication unit, or a combination thereof. In some aspects, the communication manager 1004 includes a set of components, such as a channel estimation component 1010, a determination component 1012, or a combination thereof. Alternatively, the set of components may be separate from and distinct from the communication manager 1004. In some aspects, one or more components in the set of components may include those combined as described above. Figure 2 The described base station's controller / processor, memory, scheduler, communication unit, or a combination thereof, or may be implemented therein. Additionally or alternatively, one or more components of the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the component's function or operation.

[0153] The transmitting unit 1006 can transmit a configuration instructing the UE to apply DMRS bundling to PUSCH transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions with applied DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions by the base station. The receiving unit 1002 can receive a UCI including a coherence indication based at least in part on this configuration, wherein the UCI is multiplexed with PUSCH transmissions among multiple PUSCH transmissions with applied DMRS bundling, and wherein the coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among multiple PUSCH transmissions transmitted by the UE.

[0154] Channel estimation unit 1010 can perform joint channel estimation for PUSCH transmission and one or more other PUSCH transmissions, at least partially based on a coherence indication. Channel estimation unit 1010 can also perform individual channel estimation for PUSCH transmission, at least partially based on a coherence indication. Determination unit 1012 can determine whether joint channel estimation or individual channel estimation for PUSCH transmission is performed, at least partially based on a coherence indication. Transmission unit 1006 can transmit an indication of a defined time window. Reception unit 1002 can receive an indication of the UE's ability to transmit a coherence indication for DMRS bundling. Reception unit 1002 can receive a UCI including a coherence indication, at least partially based on the indication of the UE's ability to transmit a coherence indication for DMRS bundling. Transmission unit 1006 can transmit an instruction to transmit a coherence indication for DMRS bundling. Reception unit 1002 can receive a UCI including a coherence indication, at least partially based on the instruction to transmit a coherence indication for DMRS bundling.

[0155] Figure 10 The number and arrangement of components shown are provided as an example. In practice, compared to Figure 10 The components shown may include additional components, fewer components, different components, or components with different arrangements. Furthermore, Figure 10 The two or more components shown can be implemented within a single component, or Figure 10 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 10 The collection of components (one or more components) shown can perform what is described as being made by Figure 10 Another set of components shown performs one or more functions.

[0156] The following provides an overview of some aspects of this disclosure:

[0157] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving a configuration instructing the UE to apply demodulation reference signal (DMRS) bundling to Physical Uplink Shared Channel (PUSCH) transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions with DMRS bundling applied to enable joint channel estimation across the multiple PUSCH transmissions; and transmitting uplink control information (UCI) including a coherence indication based at least in part on the configuration, wherein the UCI is multiplexed with PUSCH transmissions among the multiple PUSCH transmissions with DMRS bundling applied, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0158] Aspect 2: According to the method of Aspect 1, wherein one or more other PUSCH transmissions include a single PUSCH transmission immediately preceding the PUSCH transmission, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately preceding the PUSCH transmission.

[0159] Aspect 3: According to the method of Aspect 1, wherein one or more other PUSCH transmissions include a single PUSCH transmission immediately following a PUSCH transmission, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately following the PUSCH transmission.

[0160] Aspect 4: According to the method of Aspect 1, wherein one or more other PUSCH transmissions occur within a time window, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions occurring within the time window.

[0161] Aspect 5: According to the method of aspect 4, it also includes: receiving an instruction for a limited time window.

[0162] Aspect 6: According to the method of any one of Aspects 4 and 5, wherein the time window is limited relative to the PUSCH transmission.

[0163] Aspect 7: A method according to any of the foregoing aspects, wherein one or more other PUSCH transmissions satisfy a set of conditions relative to the PUSCH transmission, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions that satisfy the set of conditions.

[0164] Aspect 8: According to the method of aspect 7, wherein the set of conditions includes at least one of the following: one or more other PUSCH transmissions have the same resource block allocation as the PUSCH transmission; one or more other PUSCH transmissions are transmitted on the same uplink beam as the PUSCH transmission; one or more other PUSCH transmissions are transmitted with the same transmit power as the PUSCH transmission; one or more other PUSCH transmissions have the same precoding as the PUSCH transmission or a combination thereof.

[0165] Aspect 9: According to the method of any of the foregoing aspects, the coherence indication consists of a single bit.

[0166] Aspect 10: The method according to any of the foregoing aspects, wherein the absolute value of the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0167] Aspect 11: According to any one of Aspects 1 to 9, wherein the relative value of the coherence indication to the value of another transmitted coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0168] Aspect 12: According to any of the preceding aspects, if at least one of the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information, Channel State Information (CSI) or Scheduling Request (SR) is present in the UCI, then a coherence indication is appended to at least one of the HARQ-ACK information, CSI or SR; or if at least one of the HARQ-ACK information, CSI or SR is not present in the UCI, then the coherence indication is transmitted independently of the HARQ-ACK information, CSI or SR.

[0169] Aspect 13: According to the method of any of the foregoing aspects, wherein the PUSCH transmission performs rate matching around the UCI.

[0170] Aspect 14: According to any one of Aspects 1 to 12, wherein the PUSCH transmission is punctured using UCI.

[0171] Aspect 15: The method according to any of the foregoing aspects, wherein the PUSCH transmission and one or more other PUSCH transmissions include at least one of the following: different PUSCHs carrying different transport blocks, different repetitions of a particular PUSCH transmission, or combinations thereof.

[0172] Aspect 16: The method according to any of the foregoing aspects further includes: transmitting an indication of the UE's ability to transmit a coherence indication for DMRS bundling; and wherein transmitting a UCI including a coherence indication includes transmitting the UCI including a coherence indication at least in part based on the indication of the UE's ability to transmit a coherence indication for DMRS bundling.

[0173] Aspect 17: The method according to any of the foregoing aspects further includes: receiving an instruction to transmit a coherence indication for DMRS binding; and wherein transmitting a UCI including a coherence indication includes transmitting the UCI including a coherence indication at least in part based on the instruction to transmit a coherence indication for DMRS binding.

[0174] Aspect 18: A method of wireless communication performed by a base station, comprising: transmitting a configuration instructing a user equipment (UE) to apply demodulation reference signal (DMRS) bundling to a physical uplink shared channel (PUSCH) transmission, wherein the UE maintains phase coherence across multiple PUSCH transmissions with DMRS bundling to enable joint channel estimation across multiple PUSCH transmissions by the base station; and receiving uplink control information (UCI) including a coherence indication based at least in part on the configuration, wherein the UCI is multiplexed with a PUSCH transmission among the multiple PUSCH transmissions with DMRS bundling, and wherein the coherence indication indicates whether a PUSCH transmission is coherent with one or more other PUSCH transmissions among the multiple PUSCH transmissions transmitted by the UE.

[0175] Aspect 19: The method according to aspect 18 further includes: performing joint channel estimation for PUSCH transmission and one or more other PUSCH transmissions based at least in part on coherence indication.

[0176] Aspect 20: The method according to aspect 18 further includes: performing a separate channel estimation for PUSCH transmission based at least in part on a coherence indication.

[0177] Aspect 21: The method according to any one of Aspects 18 to 20 further includes: determining whether joint channel estimation or individual channel estimation for PUSCH transmission is performed based at least in part on a coherence indication.

[0178] Aspect 22: According to the method of any one of Aspects 18 to 20, wherein one or more other PUSCH transmissions include a single PUSCH transmission immediately preceding the PUSCH transmission, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately preceding the PUSCH transmission.

[0179] Aspect 23: According to the method of any one of Aspects 18 to 20, wherein one or more other PUSCH transmissions include a single PUSCH transmission immediately following a PUSCH transmission, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately following the PUSCH transmission.

[0180] Aspect 24: According to the method of any one of Aspects 18 to 20, wherein one or more other PUSCH transmissions occur within a time window, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions occurring within the time window.

[0181] Aspect 25: According to the method of aspect 24, it also includes: sending an instruction for a limited time window.

[0182] Aspect 26: According to the method of any one of Aspects 24 to 25, wherein the time window is limited relative to the PUSCH transmission.

[0183] Aspect 27: According to the method of any one of Aspects 18 to 26, wherein one or more other PUSCH transmissions satisfy a set of conditions relative to the PUSCH transmission, and wherein a coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions that satisfy the set of conditions.

[0184] Aspect 28: According to the method of aspect 27, wherein the set of conditions includes at least one of the following: one or more other PUSCH transmissions have the same resource block allocation as the PUSCH transmission, one or more other PUSCH transmissions are transmitted on the same uplink beam as the PUSCH transmission, one or more other PUSCH transmissions are transmitted with the same transmit power as the PUSCH transmission, one or more other PUSCH transmissions have the same precoding as the PUSCH transmission, or a combination thereof.

[0185] Aspect 29: According to the method of any one of Aspects 18 to 28, wherein the coherence indication consists of a single bit.

[0186] Aspect 30: According to the method of any one of Aspects 18 to 29, wherein the absolute value of the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0187] Aspect 31: According to the method of any one of Aspects 18 to 29, wherein the relative value of the coherence indication to the value of another transmitted coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

[0188] Aspect 32: According to any one of Aspects 18 to 31, wherein if at least one of the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information, Channel State Information (CSI) or Scheduling Request (SR) is present in the UCI, then a coherence indication is appended to at least one of the HARQ-ACK information, CSI or SR, or wherein if at least one of the HARQ-ACK information, CSI or SR is not present in the UCI, then the coherence indication is received independently of the HARQ-ACK information, CSI or SR.

[0189] Aspect 33: According to any one of Aspects 18 to 32, wherein the PUSCH transmission is rate matched around the UCI.

[0190] Aspect 34: According to any one of Aspects 18 to 32, wherein the PUSCH transmission is punctured using UCI.

[0191] Aspect 35: The method according to any one of Aspects 18 to 34, wherein the PUSCH transmission and one or more other PUSCH transmissions include at least one of the following: different PUSCHs carrying different transport blocks, different receptions of a particular PUSCH transmission, or a combination thereof.

[0192] Aspect 36: The method according to any one of Aspects 18 to 35 further includes: receiving an indication of the UE's ability to transmit a coherence indication for DMRS bundling; and wherein receiving a UCI including a coherence indication includes receiving the UCI including a coherence indication based at least in part on the indication of the UE's ability to transmit a coherence indication for DMRS bundling.

[0193] Aspect 37: The method according to any one of aspects 18 to 36 further includes: sending an instruction for sending a coherence indication for DMRS binding; and wherein receiving a UCI including the coherence indication includes receiving the UCI including the coherence indication based at least in part on the instruction for sending the coherence indication for DMRS binding.

[0194] Aspect 29: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions (e.g., processor-readable code) stored in the memory and executable by the processor to cause the apparatus to perform a method according to one or more aspects of aspects 1 to 17.

[0195] Aspect 30: An apparatus for wireless communication, comprising: a memory (e.g., at least one memory); and one or more processors (e.g., at least one processor) coupled to the memory, the memory and the one or more processors being configured to perform (e.g., via execution by the one or more processors of processor-readable code stored in the memory) a method according to one or more aspects of aspects 1 to 17.

[0196] Aspect 31: An apparatus for wireless communication, comprising: at least one component for performing a method according to one or more aspects 1 to 17.

[0197] Aspect 32: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method according to one or more aspects 1 to 17.

[0198] Aspect 33: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform a method according to one or more aspects of aspects 1 to 17.

[0199] Aspect 34: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions (e.g., processor-readable code) stored in the memory and executable by the processor to cause the apparatus to perform a method according to one or more aspects of aspects 18 to 37.

[0200] Aspect 35: An apparatus for wireless communication, comprising: a memory (e.g., at least one memory); and one or more processors (e.g., at least one processor) coupled to the memory, the memory and the one or more processors being configured to perform (e.g., via execution by the one or more processors of processor-readable code stored in the memory) a method according to one or more aspects of aspects 18 to 37.

[0201] Aspect 36: An apparatus for wireless communication, comprising: at least one component for performing a method according to one or more aspects 18 to 37.

[0202] Aspect 37: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform methods according to one or more aspects 18 to 37.

[0203] Aspect 38: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform a method according to one or more aspects of aspects 18 to 37.

[0204] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made in light of the foregoing disclosure, or may be derived from practice in various aspects.

[0205] As used herein, the term "component" is intended to be interpreted broadly as hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented as hardware, firmware, or a combination of hardware and software. It will become apparent that the systems or methods described herein can be implemented in various forms of hardware, firmware, or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems or methods is not a limitation in any respect. Therefore, the operation and behavior of the systems or methods described herein do not refer to specific software code—it should be understood that software and hardware can be designed to implement these systems or methods, at least in part, based on the descriptions herein.

[0206] As used in this article, a threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, as well as other examples, depending on the context.

[0207] Although specific combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically recited in the claims or disclosed in the specification. Although each dependent claim listed below may be directly subordinated to only one claim, the disclosure of aspects includes every dependent claim combined with every other claim in the set of claims. As used herein, the phrase “at least one” in the list of referenced items refers to any combination of these items, including a single member. As an example, “at least one of a, b, or c” is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0208] Unless explicitly stated otherwise, elements, actions, or instructions used herein should not be construed as essential or necessary elements, actions, or instructions. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items referenced by the article “the” and may be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with “one or more.” Where the intent is for only one item, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “have,” “have,” “contain,” etc., are intended to be open-ended terms. Furthermore, the phrase “based on” is intended to mean “at least partially based on,” unless otherwise explicitly stated. Furthermore, as used herein, the term “or” is intended to be inclusive when used in a series of contexts and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., if used in combination with “any one of…” or “only one of…”).

Claims

1. A user equipment (UE) for wireless communication, comprising: At least one memory containing instructions; as well as At least one processor is configured to execute the instructions to cause the UE to: The UE receives a configuration instructing it to apply demodulation reference signal (DMRS) bundling to physical uplink shared channel (PUSCH) transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions for which the DMRS bundling is applied, enabling joint channel estimation across the multiple PUSCH transmissions; and Uplink control information (UCI) including a coherence indication is transmitted at least in part based on the configuration, wherein the UCI is multiplexed with a PUSCH transmission among the plurality of PUSCH transmissions that are bundled with the DMRS, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the plurality of PUSCH transmissions transmitted by the UE.

2. The UE according to claim 1, wherein, The one or more other PUSCH transmissions include a single PUSCH transmission immediately preceding the PUSCH transmission, and wherein the coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately preceding the PUSCH transmission.

3. The UE according to claim 1, wherein, The one or more other PUSCH transmissions include a single PUSCH transmission immediately following the PUSCH transmission, and wherein the coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately following the PUSCH transmission.

4. The UE according to claim 1, wherein, The one or more other PUSCH transmissions occur within a time window, and the coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions occurring within the time window.

5. The UE according to claim 4, wherein, The at least one processor is also configured to cause the UE to receive an instruction defining the time window.

6. The UE according to claim 4, wherein, The time window is defined relative to the PUSCH transmission.

7. The UE according to claim 1, wherein, The one or more other PUSCH transmissions satisfy a set of conditions relative to the PUSCH transmission, wherein the coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions that satisfy the set of conditions.

8. The UE according to claim 7, wherein, The condition set includes at least one of the following: The one or more other PUSCH sends have the same resource block allocation as the PUSCH send. The one or more other PUSCH transmissions are transmitted on the same uplink beam as the PUSCH transmission. The one or more other PUSCH transmissions are transmitted using the same transmission power as the PUSCH transmission. The one or more other PUSCH transmissions have the same precoding as the PUSCH transmission, or Its combination.

9. The UE according to claim 1, wherein, The coherence indicator consists of a single bit.

10. The UE according to claim 1, wherein, The absolute value of the coherence indicator indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

11. The UE according to claim 1, wherein, The relative value of the coherence indication with respect to the value of another transmitted coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

12. The UE according to claim 1, wherein, If at least one of the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK), Channel State Information (CSI), or Scheduling Request (SR) is present in the UCI, then the coherence indication is appended to at least one of the HARQ-ACK, the CSI, or the SR, or If the HARQ-ACK information, the CSI, or the SR is not present in the UCI, then the coherence indication is transmitted independently of the HARQ-ACK information, the CSI, or the SR.

13. The UE according to claim 1, wherein, The PUSCH transmission performs rate matching around the UCI or uses the UCI for puncturing.

14. The UE according to claim 1, wherein, The PUSCH transmission and the one or more other PUSCH transmissions include at least one of the following: Send different PUSCHs carrying different transport blocks. Different duplicates sent by a specific PUSCH, or Its combination.

15. The UE according to claim 1, wherein, The at least one processor is further configured to cause the UE to transmit an indication of the UE's ability to support the transmission of the coherence indication for the DMRS binding; and The at least one processor that causes the UE to transmit the UCI is configured to cause the UE to transmit the UCI at least in part based on the indication that the UE supports the transmission of the coherence indication for the DMRS binding.

16. The UE according to claim 1, wherein, The at least one processor is further configured to cause the UE to receive instructions to send the coherence indication for the DMRS binding; and The at least one processor that causes the UE to transmit the UCI is configured to cause the UE to transmit the UCI at least in part based on the instruction to transmit the coherence indication for the DMRS binding.

17. A method for wireless communication performed by a user equipment (UE), comprising: The UE receives a configuration instructing it to apply demodulation reference signal (DMRS) bundling to physical uplink shared channel (PUSCH) transmissions, wherein the UE maintains phase coherence across multiple PUSCH transmissions for which the DMRS bundling is applied, enabling joint channel estimation across the multiple PUSCH transmissions; and Uplink control information (UCI) including a coherence indication is transmitted at least in part based on the configuration, wherein the UCI is multiplexed with a PUSCH transmission among the plurality of USCH transmissions that are bundled with the DMRS, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the plurality of PUSCH transmissions transmitted by the UE.

18. The method according to claim 17, wherein, The one or more other PUSCH transmissions include a single PUSCH transmission immediately preceding the PUSCH transmission, and wherein the coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately preceding the PUSCH transmission.

19. The method of claim 17, wherein, The one or more other PUSCH transmissions include a single PUSCH transmission immediately following the PUSCH transmission, and wherein the coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately following the PUSCH transmission.

20. The method of claim 17, wherein, The one or more other PUSCH transmissions occur within a time window, and the coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions occurring within the time window.

21. The method according to claim 17, wherein, The absolute value of the coherence indicator indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

22. The method according to claim 17, wherein, The relative value of the coherence indication with respect to the value of another transmitted coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions transmitted by the UE.

23. A base station for wireless communication, comprising: At least one memory containing instructions; as well as At least one processor is configured to execute the instructions to cause the base station to: The system transmits an instruction to the User Equipment (UE) to apply a demodulation reference signal (DMRS) bundle to the Physical Uplink Shared Channel (PUSCH) transmission, wherein the UE maintains phase coherence across multiple PUSCH transmissions for which the DMRS bundle is applied, enabling joint channel estimation across the multiple PUSCH transmissions via the base station; and The uplink control information (UCI) including a coherence indication is received at least in part based on the configuration, wherein the UCI is multiplexed with a PUSCH transmission among the plurality of PUSCH transmissions that are bundled with the DMRS, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the plurality of PUSCH transmissions transmitted by the UE.

24. The base station according to claim 23, wherein, The at least one processor is further configured to cause the base station to perform joint channel estimation for the PUSCH transmission and the one or more other PUSCH transmissions, at least in part, based on the coherence indication.

25. The base station according to claim 23, wherein, The at least one processor is also configured to cause the base station to perform a separate channel estimation for the PUSCH transmission based at least in part on the coherence indication.

26. The base station according to claim 23, wherein, The at least one processor is further configured to enable the base station to determine whether to perform joint channel estimation or individual channel estimation for the PUSCH transmission based at least in part on the coherence indication.

27. The base station according to claim 23, wherein, The one or more other PUSCH transmissions include a single PUSCH transmission immediately preceding the PUSCH transmission, and wherein the coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately preceding the PUSCH transmission.

28. The base station according to claim 23, wherein, The one or more other PUSCH transmissions include a single PUSCH transmission immediately following the PUSCH transmission, and wherein the coherence indicator indicates whether the PUSCH transmission is coherent with the single PUSCH transmission immediately following the PUSCH transmission.

29. The base station according to claim 23, wherein, The one or more other PUSCH transmissions occur within a time window, and the coherence indicator indicates whether the PUSCH transmission is coherent with all of the one or more other PUSCH transmissions occurring within the time window.

30. A method for wireless communication performed by a base station, comprising: The system transmits an instruction to the User Equipment (UE) to apply a demodulation reference signal (DMRS) bundle to the Physical Uplink Shared Channel (PUSCH) transmission, wherein the UE maintains phase coherence across multiple PUSCH transmissions for which the DMRS bundle is applied, enabling joint channel estimation across the multiple PUSCH transmissions via the base station; and The uplink control information (UCI) including a coherence indication is received at least in part based on the configuration, wherein the UCI is multiplexed with a PUSCH transmission among the plurality of PUSCH transmissions that are bundled with the DMRS, and wherein the coherence indication indicates whether the PUSCH transmission is coherent with one or more other PUSCH transmissions among the plurality of PUSCH transmissions transmitted by the UE.

31. A user equipment (UE) for wireless communication, the UE comprising components for performing the method according to any one of claims 17-22.

32. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to perform the method according to any one of claims 17 to 22.

33. A computer program product comprising computer-readable instructions, which, when executed by one or more processors of a user equipment (UE), cause the UE to perform the method according to any one of claims 17-22.

34. A base station for wireless communication, the base station including components for performing the method according to claim 30.

35. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including, when executed by one or more processors of a base station, causing the base station to perform one or more instructions according to the method of claim 30.

36. A computer program product comprising computer-readable instructions, which, when executed by one or more processors of a base station, cause the base station to perform the method according to claim 30.

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