Shared Channel Reference Signal Beamforming and Multiple Concurrent Shared Channel Transmissions

Abstract

Methods, systems, and devices for wireless communication are described. The described techniques provide a user equipment (UE) to identify a first set of scheduled transmissions to be received using a first set of time-frequency resources, where reference signals of the first set of transmissions may be beamformed according to a first reference signal beamforming pattern. The UE may identify a second set of scheduled transmissions to be received using a second set of time-frequency resources that overlaps with the first set of resources. The UE may determine a second reference signal beamforming pattern for beamforming the reference signals received in the first set of transmissions. For example, the UE may modify the first reference signal beamforming pattern to determine the second reference signal beamforming pattern. The UE may receive the second set of scheduled transmissions and the first set of scheduled transmissions according to the second reference signal beamforming pattern.

Description

[0001] Cross-reference

[0002] This patent application claims the benefit of Greek Provisional Patent Application No. 20200100122, filed on Mar. 5, 2020, by MANOLAKOS et al., entitled “SHARED CHANNEL REFERENCE SIGNAL BUNDLING AND MULTIPLE CONCURRENT SHARED CHANNEL TRANSMISSIONS”, which is assigned to the assignee of this application and incorporated herein by reference in its entirety. Field of the Disclosure

[0003] The following generally relates to wireless communications and, more particularly, to shared channel reference signal bundling and multiple concurrent shared channel transmissions.

[0004] Background

[0005] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing available system resources such as time, frequency, and power. Examples of such multi-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ various techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multi-access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication for multiple communication devices, which may also be referred to as User Equipment (UE).

[0006] In some wireless communication systems, a base station and a UE may transmit and receive various reference signals associated with data transmission such as Demodulation Reference Signals (DMRS). A UE may use DMRS to estimate the channel characteristics of a data channel, and the UE may use the estimated channel characteristics to perform demodulation or decoding of transmissions conveyed over the estimated channel. In some cases, a bundling configuration may indicate that the UE will group one or more reference signals (e.g., DMRS) for multiple transmissions over a time interval.

[0007] Summary

[0008] The described techniques relate to improved methods, systems, devices, and apparatus for supporting shared channel reference signal beamforming and multiple concurrent shared channel transmissions. The described techniques provide a user equipment (UE) to identify a first scheduled transmission set to be received using a set of time-frequency resources on a shared channel (e.g., a physical downlink shared channel (PDSCH) transmission set), where the reference signals (e.g., demodulation reference signals (DMRS)) of the first transmission set may be beamformed according to a first reference signal beamforming pattern. For example, a base station may schedule a first downlink transmission set for the UE, and the base station may signal to the UE a beamforming configuration including the first reference signal beamforming pattern (e.g., via downlink control information (DCI)). Additionally, the UE may identify a second scheduled transmission to be received using a set of time-frequency resources on the shared channel that at least partially overlaps (e.g., in time and / or frequency) the resources used for the first scheduled transmission set.

[0009] The UE may determine a second reference signal beamforming pattern for beamforming the DMRS received in the first scheduled transmission set. For example, the UE may modify the first reference signal beamforming pattern to determine the second reference signal beamforming pattern (e.g., based on the UE's ability to receive simultaneous transmissions and whether the simultaneous transmissions are scheduled for overlapping frequency resource sets in addition to overlapping time resource sets). In some cases, the UE may determine not to beamform the first scheduled transmission set, and the UE may process each transmission in the first scheduled transmission set individually (e.g., according to their respective DMRS). Alternatively, the UE may determine to modify the first beamforming pattern to beamform the DMRS of, for example, transmissions received before the overlapping transmissions, transmissions received after the overlapping transmissions, or both. Then, the UE may receive the second scheduled transmission and at least a subset of the first scheduled transmission set according to the determined second reference signal beamforming pattern.

[0010] A method of wireless communication at a UE is described. The method may include: identifying a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern; identifying a second scheduled transmission for the shared channel that at least partially overlaps in time with at least one transmission in the first scheduled transmission set; determining a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission; receiving at least a subset of the first scheduled transmission set via the shared channel based on the second reference signal beamforming pattern; and receiving the second scheduled transmission via the shared channel.

[0011] Describes an apparatus for wireless communication at a UE. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: identify a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern; identify a second scheduled transmission for the shared channel that at least partially overlaps in time with at least one transmission of the first scheduled transmission set; determine a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission; receive at least a subset of the first scheduled transmission set via the shared channel based on the second reference signal beamforming pattern; and receive the second scheduled transmission via the shared channel.

[0012] Describes another device for wireless communication at a UE. The device may include means for: identifying a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern; identifying a second scheduled transmission for the shared channel that at least partially overlaps in time with at least one transmission in the first scheduled transmission set; determining a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission; receiving at least a subset of the first scheduled transmission set via the shared channel based on the second reference signal beamforming pattern; and receiving the second scheduled transmission via the shared channel.

[0013] Describes a non-transitory computer-readable medium storing code for wireless communication at a UE. The code may include instructions executable by a processor to: identify a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern; identify a second scheduled transmission for the shared channel that at least partially overlaps in time with at least one transmission of the first scheduled transmission set; determine a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission; receive at least a subset of the first scheduled transmission set via the shared channel based on the second reference signal beamforming pattern; and receive the second scheduled transmission via the shared channel.

[0014] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining the second reference signal beamforming pattern may include operations, features, means, or instructions for: determining to individually process the reference signals for each transmission in the first scheduled transmission set.

[0015] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a second reference signal beamforming pattern can include operations, features, apparatuses, or instructions for the following actions: determining that a second scheduled transmission overlaps in time with a reference signal of at least one transmission in a first set of scheduled transmissions.

[0016] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a second reference signal beamforming pattern can include operations, features, apparatuses, or instructions for the following actions: determining to beamform reference signals across a subset of a first set of scheduled transmissions.

[0017] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the beamformed reference signals include at least one reference signal of a scheduled transmission of at least one transmission in a first set of scheduled transmissions, where the scheduled transmission overlaps at least partially with a second scheduled transmission.

[0018] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the beamformed reference signals exclude reference signals of scheduled transmissions that overlap at least partially with a second scheduled transmission.

[0019] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the beamformed reference signals of a subset of a first set of scheduled transmissions can be scheduled before the second scheduled transmission.

[0020] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the beamformed reference signals of a subset of a first set of scheduled transmissions are scheduled after the second scheduled transmission.

[0021] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a second reference signal beamforming pattern can include operations, features, apparatuses, or instructions for the following actions: modifying a first reference signal beamforming pattern based on a UE's ability to receive the second scheduled transmission and the at least one transmission in the first set of scheduled transmissions to obtain a second reference signal beamforming pattern.

[0022] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a second reference signal beamforming pattern can include operations, features, apparatuses, or instructions for the following actions: modifying the first reference signal beamforming pattern based on determining that at least a portion of the frequency resources associated with the second scheduled transmission do not overlap with the frequency resources associated with the at least one transmission in the first set of scheduled transmissions.

[0023] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a second reference signal beamforming pattern may include operations, features, apparatuses, or instructions for the following actions: determining that the second reference signal beamforming pattern is the same as the first reference signal beamforming pattern based on determining that frequency resources associated with at least one transmission in a first scheduled transmission set completely overlap with frequency resources associated with a second scheduled transmission.

[0024] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first scheduled transmission set may be transmitted from a first transmitter, and the second scheduled transmission may be transmitted from a second transmitter.

[0025] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: receiving a beamforming configuration, wherein determining the second reference signal beamforming pattern for the first scheduled transmission set may be based on the beamforming configuration.

[0026] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: identifying a beamforming capability of a UE, wherein determining the second reference signal beamforming pattern for the first scheduled transmission set may be based on the beamforming capability of the UE. Brief Description of the Drawings

[0028] Figure 1 Examples of wireless communication systems that support shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure are illustrated.

[0029] Figure 2 Examples of transmission timelines that support shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure are illustrated.

[0030] Figure 3 Examples of transmission timelines that support shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure are illustrated.

[0031] Figure 4 Examples of transmission timelines that support shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure are illustrated.

[0032] Figures 5A - 5C Examples of transmission timelines that support shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure are illustrated.

[0033] Figures 6A - 6DAn example transmission timeline supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is illustrated.

[0034] Figure 7 An example of a process flow supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is illustrated.

[0035] Figure 8 and Figure 9 A block diagram of an apparatus supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is shown.

[0036] Figure 10 A block diagram of a communication manager supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is shown.

[0037] Figure 11 A diagram of a system including an apparatus supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is shown.

[0038] Figure 12 A flowchart of a method for supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is shown.

[0039] Detailed Description

[0040] In some deployments, a base station may transmit a reference signal to a user equipment (UE), where the reference signal may be associated with a corresponding data channel transmission. For example, the base station may transmit a demodulation reference signal (DMRS) to the UE, and the UE may use the DMRS to estimate the channel characteristics of the corresponding radio channel (e.g., the channel on which the base station may have scheduled the UE to communicate with the base station) on which the base station and the UE may communicate (e.g., via channel quality measurements). The UE may accordingly use the estimated channel characteristics based on the DMRS to demodulate transmissions received from the base station.

[0041] In some cases, the base station may schedule multiple communications with the UE, and the base station may indicate a beamforming configuration associated with the scheduled communications to the UE. The beamforming configuration may indicate, for example, that the UE will group the DMRSs of the scheduled transmissions according to the beamforming configuration, e.g., group the DMRSs between multiple transmissions over a corresponding set of time resources. The UE may then use the grouped DMRSs to perform channel estimation to demodulate transmissions received from the base station on the corresponding one or more channels.

[0042] In some cases, the base station may schedule the UE to receive a first transmission set and a second transmission (or transmission set) according to a bundling configuration that is also signaled to the UE, where the second transmission may overlap in time and / or frequency with one or more transmissions in the first transmission set (e.g., occupy at least a partially overlapping set of time-frequency resources). For example, the base station may schedule the second transmission to use time resources that at least partially overlap with the set of time resources scheduled for the first transmission set. In some cases, the second transmission set may use frequency resources that at least partially overlap with the set of frequency resources scheduled for the first transmission set. In other cases, the frequency resources of the first transmission set and the second transmission may not overlap.

[0043] The following techniques are provided herein by which a UE can determine a bundling mode for bundling reference signal (e.g., DMRS) transmissions for such cases. For example, the UE may determine not to apply bundling and may accordingly perform channel estimation individually for each transmission. Alternatively, the UE may determine to modify the received bundling configuration based on, for example, the UE's capabilities and the way in which the resources for the second transmission overlap with the resources for the first transmission set. For example, based on whether the UE has the ability to receive bundled transmissions and concurrently overlapping transmissions (e.g., transmissions that may or may not overlap in the frequency domain and the time domain). For example, if the UE does not have the ability to receive simultaneous (e.g., conflicting) transmissions, the UE may modify the bundling configuration to suppress bundling of the DMRS, or bundle the DMRS for the transmission that includes the DMRS before the conflicting transmission, the DMRS for the transmission that includes the DMRS after the conflicting transmission, or both.

[0044] Aspects of the present disclosure are initially described in the context of a wireless communication system. Then examples of transmission timelines and process flows are described. Aspects of the present disclosure are further illustrated and described by means of diagrams of apparatuses (devices), system diagrams, and flowcharts related to shared channel reference signal bundling and multiple concurrent shared channel transmissions.

[0045] Figure 1 An example of a wireless communication system 100 that supports shared channel reference signal bundling and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0046] Base stations 105 may be dispersed throughout a geographic area to form a wireless communication system 100 and may be of different forms or have different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110, and the UEs 115 and the base stations 105 may establish one or more communication links 125 over the coverage area 110. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support signal communication according to one or more radio access technologies.

[0047] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be of different forms or have different capabilities. Some example UEs 115 are illustrated in Figure 1 . The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in Figure 1 .

[0048] Each base station 105 may communicate with the core network 130, or with each other, or both. For example, the base stations 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105), or indirectly (e.g., via the core network 130), or both directly and indirectly over the backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul links 120 may be or include one or more wireless links.

[0049] One or more of the base stations 105 described herein may include or may be referred to by those of ordinary skill in the art as a base transceiver station, radio base station, access point, radio transceiver, B node, evolved B node (eNB), next generation B node, or gigabit B node (any of which may be referred to as a gNB), home B node, home evolved B node, or other suitable terms.

[0050] The UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where "device" may also be referred to as a unit, station, terminal, or client, etc. The UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, the UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device, etc., which may be implemented in various objects such as electrical appliances, vehicles, meters, etc.

[0051] The UE 115 described herein may be capable of communicating with various types of devices, such as other UE 115s that may sometimes act as relays, as well as the base station 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc., as Figure 1 shown.

[0052] The UE 115 and the base station 105 may wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources that have a defined physical layer structure for supporting the communication link 125. For example, the carrier for the communication link 125 may include a portion (e.g., bandwidth part (BWP)) of the radio frequency spectrum band that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may support communicating with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0053] In some examples (e.g., in a carrier aggregation configuration), the carrier may also have acquisition signaling or control signaling for coordinating the operation of other carriers. The carrier may be associated with a frequency channel (e.g., evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be positioned according to a channel raster for discovery by the UE 115. The carrier may operate in a stand-alone mode in which initial acquisition and connection may be performed by the UE 115 via the carrier, or the carrier may operate in a non-stand-alone mode in which the connection is anchored using a different carrier (e.g., different carriers of the same or different radio access technologies).

[0054] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communication (e.g., in the FDD mode), or may be configured to carry both downlink communication and uplink communication (e.g., in the TDD mode).

[0055] A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or the wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths of a carrier of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0056] The signal waveform transmitted on a carrier may include multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing an MCM technique, a resource element may include one symbol period (e.g., the duration of one modulated symbol) and one subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate of the UE 115 may be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and using multiple spatial layers may further increase the data rate or data integrity of communication with the UE 115.

[0057] One or more parameter sets for a carrier may be supported, where the parameter sets may include subcarrier spacing (Δf) and cyclic prefix. The carrier may be divided into one or more BWPs with the same or different parameter designs. In some examples, the UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and the communication for the UE 115 may be limited to one or more active BWPs.

[0058] A time interval of the base station 105 or the UE 115 may be expressed as a multiple of a basic time unit, and the basic time unit may refer to, for example, the sampling period T s = 1 / (Δf max ·N f ) seconds, where Δf max may represent the maximum supported subcarrier spacing, and N f may represent the maximum supported discrete Fourier transform (DFT) size. The time intervals of communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0059] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a plurality of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a plurality of symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-slots each containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0060] A subframe, a time slot, a mini-slot, or a symbol may be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain), and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., as a burst of shortened TTIs (sTTIs)).

[0061] Physical channels can be multiplexed on a carrier according to various techniques. The physical control channel and the physical data channel can be multiplexed on a downlink carrier using, for example, one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for the physical control channel can be defined by the number of symbol periods and can extend across the system bandwidth of the carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) can be configured for a set of UEs 115. For example, one or more of the UEs 115 can monitor or search a control region for control information according to one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the encoded information for a control information format with a given payload size. The search space set can include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0062] Each base station 105 can provide communication coverage via one or more cells (e.g., macro cells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" can refer to a logical communication entity for communicating with a base station 105 (e.g., on a carrier) and can be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others) for distinguishing adjacent cells. In some examples, a cell can also refer to a geographic coverage area 110 or a portion of the geographic coverage area 110 (e.g., a sector) on which the logical communication entity operates. The scope of such cells can vary from a smaller area (e.g., a structure, a subset of a structure) to a larger area depending on various factors (such as the capabilities of the base station 105). For example, a cell can be or include a building, a subset of a building, or an external space between or overlapping with the geographic coverage area 110, and other examples.

[0063] Macro cells generally cover a relatively large geographical area (e.g., with a radius of several kilometers) and may allow unconstrained access by UEs 115 having a service subscription with the network provider that supports the macro cell. Small cells may be associated with a lower-power base station 105 (compared to macro cells), and small cells may operate in the same or a different (e.g., licensed, unlicensed) frequency band as the macro cell. Small cells may provide unconstrained access to UEs 115 having a service subscription with the network provider, or may provide constrained access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with users in a home or office). Base station 105 may support one or more cells and may also support communication on one or more cells using one or more component carriers.

[0064] In some examples, a carrier may support multiple cells and may be configured with different cells according to different protocol types that may provide access for different types of devices (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)).

[0065] In some examples, base station 105 may be mobile and thus provide communication coverage for a mobile geographical coverage area 110. In some examples, different geographical coverage areas 110 associated with different technologies may overlap, but different geographical coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographical coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may include, for example, a heterogeneous network where different types of base stations 105 use the same or different radio access technologies to provide coverage for various geographical coverage areas 110.

[0066] Wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, base stations 105 may have different frame timings, and in some examples, transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0067] Some UEs 115 (such as MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices integrated with sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents the information to a person interacting with the application. Some UEs 115 can be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, field survival monitoring, weather and geographical event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0068] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. The UE 115 can be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably herein.

[0069] In some examples, the UE 115 can also be capable of communicating directly with other UEs 115 on a device-to-device (D2D) communication link 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UEs 115 utilizing D2D communication can be within the geographical coverage area 110 of the base station 105. Other UEs 115 in such a group can be outside the geographical coverage area 110 of the base station 105 or unable to receive transmissions from the base station 105 for other reasons. In some examples, groups of UEs 115 communicating via D2D communication can utilize a one-to-many (1:M) system where each UE 115 transmits to every other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0070] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information related to the V2X system. In some examples, vehicles in a V2X system can communicate with roadside infrastructure (such as roadside units), or with the network, or with both, using vehicle-to-network (V2N) communication via one or more network nodes (e.g., base station 105).

[0071] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC can include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)), and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity can manage non-access stratum (NAS) functions, such as the mobility, authentication, and bearer management of a UE 115 served by a base station 105 associated with the core network 130. User IP packets can be passed through the user plane entity, which can provide IP address allocation and other functions. The user plane entity can be connected to a network operator IP service 150. The operator IP service 150 can include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0072] Some network devices (such as base station 105) can include subcomponents, such as an access network entity 140, which can be an example of an access node controller (ANC). Each access network entity 140 can communicate with each UE 115 through one or more other access network transmission entities 145, which can be referred to as radio heads, intelligent radio heads, or transmit / receive points (TRPs). Each access network transmission entity 145 can include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 can be distributed across various network devices (e.g., radio heads and ANCs) or combined into a single network device (e.g., base station 105).

[0073] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or the decimeter band because the wavelengths are in the range of approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can sufficiently penetrate various structures for macrocells to serve UEs 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmissions can be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers).

[0074] The wireless communication system 100 may also operate in the super-high frequency (SHF) region of the frequency band from 3 GHz to 30 GHz (also referred to as the centimeter band) or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as the millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the devices. However, the propagation of EHF transmissions may experience even greater atmospheric attenuation and shorter ranges than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the use of frequency bands designated across these frequency regions may vary by country or regulatory body.

[0075] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency bands. For example, the wireless communication system 100 may employ licensed-assisted access (LAA), Long-Term Evolution Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency band, devices (such as the base station 105 and the UE 115) may employ carrier sensing for collision detection and avoidance. In some examples, operation in an unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with a component carrier operating in a licensed band. Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer (P2P) transmissions, or device-to-device (D2D) transmissions, among others.

[0076] Base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located at different geographical locations. Base station 105 may have an antenna array that has several rows and columns of antenna ports for beamforming that base station 105 can use to support communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0077] Base station 105 or UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0078] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., base station 105, UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals communicated via the antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signals communicated via the antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustment associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0079] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, the communication of the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer can perform packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer can perform priority handling and multiplex logical channels into transport channels. The MAC layer can also use error detection techniques, error correction techniques, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of an RRC connection that supports the radio bearers for user plane data between the UE 115 and the base station 105 or the core network 130. In the physical layer, the transport channels can be mapped to physical channels.

[0080] The UE 115 and the base station 105 can support retransmission of data to increase the likelihood that the data is successfully received. Hybrid Automatic Repeat Request (HARQ) feedback is a technique for increasing the likelihood that data is correctly received on the communication link 125. HARQ can include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), Forward Error Correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve the throughput of the MAC layer in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device can support simultaneous slot HARQ feedback, where the device can provide HARQ feedback in a particular slot for data received in the previous symbols in that slot. In other cases, the device can provide HARQ feedback in a subsequent slot or according to some other time interval.

[0081] The base station 105 and the UE 115 can communicate reference signals associated with data channel transmissions, such as DMRS. For example, the UE 115 can use DMRS to estimate (e.g., via channel quality measurements) the channel characteristics of the radio channel over which the base station 105 and the UE 115 communicate data. The UE 115 can use the estimated channel characteristics from the DMRS to demodulate transmissions received from the base station 105 or decode the associated channels. For example, the base station 105 can transmit one or more DMRS to the UE 115 in each of one or more TTIs (e.g., scheduling units such as slots, mini-slots, combinations of slots and mini-slots, frames, sub-frames, groups of symbols, etc.).

[0082] In some cases, the base station 105 may schedule multiple communications with the UE 115, and the base station 105 may indicate to the UE 115 a beamforming configuration associated with one or more of the scheduled communications. For example, the beamforming configuration may indicate that the UE 115 shall group one or more reference signals (e.g., DMRS) of the scheduled transmission according to a corresponding beamforming configuration (e.g., DMRS beamforming configuration) for DMRS across a group including one or more TTIs in the time domain. The UE 115 may then use the group including multiple DMRSs to perform channel estimation for demodulating the transmission received from the base station 105. This may provide potential performance improvements for, e.g., providing coverage enhancement, thus obtaining improved channel estimation performance in relatively high mobility scenarios; reducing the amount of signaling overhead for conveying DMRS, which may correspondingly increase the peak throughput; and other similar benefits.

[0083] In some cases, the beamforming configuration for time domain DMRS beamforming may indicate slot-level aggregation of downlink TTIs, e.g., across one or more downlink slots. In some cases, the beamforming configuration may be signaled in one slot and may be applied to one or more subsequent slots. In some cases, the DMRS may be associated with downlink data transmission (e.g., on the physical downlink shared channel (PDSCH)) using a particular instance of a physical channel (e.g., corresponding to a particular antenna port).

[0084] In some cases, the base station may schedule the UE to receive a first beamformed transmission set (e.g., according to a specific beamforming configuration), and the base station may schedule the UE to receive a second transmission (or transmission set), where the second transmission may overlap one or more transmissions in the first transmission set in time and / or frequency (e.g., occupy an overlapping set of time-frequency resources). For example, the base station may schedule the second transmission to use a set of resources that overlaps in time with the set of resources for which the base station has scheduled the first transmission set, but the set of resources for the second transmission may not overlap in frequency with the set of resources for the first transmission set. Alternatively, the base station may schedule the second transmission to use a set of resources that overlaps in both time and frequency with the set of resources for which the base station has scheduled the first transmission set. In some examples, the second transmission may puncture one or more transmissions in the first transmission set. In other examples, the second transmission may be spatially separated or processed (e.g., different spatial layers, different beams, different TRPs) such that the UE can receive the second transmission and the transmissions of the first transmission set concurrently. Techniques are provided herein by which the UE can determine how to apply DMRS beamforming for such cases. For example, the UE may determine not to apply beamforming and perform channel estimation individually for each transmission accordingly. Alternatively, the UE may determine to modify the beamforming configuration, for example, to beamform the DMRS received before and / or after the overlapping transmission.

[0085] Figure 2 An example transmission timeline 200 is illustrated that supports shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure. In some examples, the transmission timeline 200 may implement aspects of the wireless communication system 100 as described with reference to Figure 1 The transmission timeline 200 illustrates a procedure for a first technique for reference signal beamforming (e.g., DMRS beamforming) to facilitate communication between a base station and a UE, where the base station and the UE may be examples of the corresponding devices described with reference to Figure 1

[0086] The transmission timeline 200 shows communication between a UE and a base station over a channel including several TTIs (e.g., time slots) including a first time slot 205, a second time slot 210, and a third time slot 215. In other implementations, a TTI may include, for example, any type of scheduling unit for wireless communication, such as a time slot, a mini-slot, a combination of time slots and mini-slots, a frame, a sub-frame, a group of symbols, etc. Figure 2 The example transmission timeline 200 shows three time slots, but it should be understood that the techniques described herein may be similarly applied across any greater or fewer number of time slots.

[0087] ​The base station and the UE can communicate uplink and downlink transmissions during each time slot. For example, during the first time slot 205, the base station can transmit control signaling to the UE (e.g., via DCI 220). The base station can also transmit a downlink data transmission to the UE (e.g., in several PDSCH transmissions). For example, during the second time slot 210, the base station can transmit a first PDSCH transmission 225 (e.g., shown as PDSCH1) and a second PDSCH transmission 230 (e.g., shown as PDSCH2) to the UE. During the third time slot 215, the base station can transmit a third PDSCH 235 transmission (e.g., shown as PDSCH3) to the UE.

[0088] In some cases, for example, as shown in the exemplary transmission timeline 200 of Figure 2 DCI 220 may indicate that the UE will use a "look-ahead" DMRS bundle. In a look-ahead DMRS bundle, DCI 220 may indicate the bundling configuration for a set of bundled transmissions 240 after the time slot in which the UE receives DCI 220. For example, as shown in Figure 2 the UE may receive DCI220 in the first time slot 205, and this DCI may indicate that the bundled transmission 240 will include transmissions in two time slots after the first time slot 205 in which the UE receives DCI 220 (e.g., indicating that the bundled transmission 240 will include DMRS transmissions in the second time slot 210 and the third time slot 215). In this way, the base station can dynamically indicate the bundling configuration for upcoming communications to the UE.

[0089] Accordingly, the UE can perform channel estimation using the DMRS included in each of the PDSCH transmissions in the second time slot 210 and the third time slot 215. As shown in Figure 2 the UE can perform channel estimation using the DMRS received in each of the first PDSCH transmission 225, the second PDSCH transmission 230, and the third PDSCH transmission 235.

[0090] In some cases, the base station can schedule a first set of transmissions (e.g., the first to third PDSCH transmissions shown in Figure 2 and a second transmission (or set of transmissions), where the second transmission may overlap in time and / or frequency with one or more transmissions of the first set of transmissions (e.g., occupy an overlapping set of time-frequency resources). For example, the base station can schedule the second transmission to use a set of resources that overlap in time with the set of resources for which the base station schedules the first set of transmissions, but the set of resources for the second transmission may not overlap in frequency with the set of resources for the first set of transmissions. Alternatively, the base station can schedule the second transmission to use a set of resources that overlap in both time and frequency with the set of resources for which the base station schedules the first set of transmissions.

[0091] In some cases, certain scheduling constraints may be imposed on PDSCH transmissions (e.g., to limit the operational complexity at the UE). For example, in some cases, the UE may support receiving control signaling in multiple physical downlink control channels (PDCCHs) corresponding to multiple TRPs and / or multiple antenna panels. For such UEs that support multi-TRP / panel transmissions based on multiple PDCCHs, and where each of the multiple PDCCH transmissions can schedule a corresponding PDSCH transmission (e.g., for eMBB with non-ideal backhaul links), one or more scheduling restrictions may be imposed on the UE. For example, the UE may be scheduled to receive multiple PDSCH transmissions that are non-overlapping in time and frequency, partially overlapping in time and / or frequency, or fully overlapping in time and / or frequency, and the UE may be configured with one or more scheduling rules or constraints (e.g., scheduling restrictions) for such scenarios.

[0092] For example, the scheduling rule may establish that it is not desirable for the UE to use different DMRS configurations for pre-loaded DMRS symbols (e.g., for DMRS transmissions), additional DMRS transmissions, and / or DMRS symbol positions and DMRS configuration types (e.g., in cases where the UE can be scheduled to receive fully or partially overlapping PDSCHs). Additionally or alternatively, the scheduling rule may establish that it is not desirable for the UE to use more than one transmission configuration indicator (TCI) index (e.g., indicating the TCI state and / or quasi-co-location (QCL) configuration for one or more antennas of the UE) for DMRS ports within the same decoded group (e.g., code division multiplexing (CDM) group) for transmissions (e.g., for PDSCH transmissions scheduled to use a set of time-frequency resources that are fully and / or partially overlapping). Additionally or alternatively, the scheduling rule may establish that the UE will apply complete scheduling information to receive a particular PDSCH based only on the corresponding PDCCH transmission (e.g., thus not applying conflicting scheduling information from other PDCCH transmissions). Additionally or alternatively, the scheduling rule may establish that it is desirable for the UE to be scheduled to use the same active BWP bandwidth and the same subcarrier spacing for the respective PDSCH transmissions in multiple overlapping PDSCH transmissions at a given time resource. In some cases, the scheduling rule may establish that the UE will apply several (e.g., 1) active BWPs per component carrier.

[0093] In some cases, the UE may be configured by a higher layer parameter (e.g., a PDCCH configuration parameter) for the active BWP of the serving cell that includes multiple different values (e.g., two different values) for the location of control resource information. In such cases, the scheduling rules may establish that the UE is expected to receive multiple PDCCHs that are scheduled to use (e.g., in time and / or frequency) overlapping resource sets according to the UE capabilities. Accordingly, the UE may not be configured to use joint HARQ-ACK feedback or individual HARQ-ACK feedback for transmissions, and the UE may instead provide such joint or individual HARQ-ACK feedback according to the UE capabilities or resource configuration. In some cases, the control information may not provide a location (e.g., the CORESET may not include a value for the CORESETPoolIndex parameter). In such cases, the UE may use a configured value, such as a zero value for the CORESETPoolIndex parameter, for example.

[0094] In some cases where multiple different TRPs and / or panels can be scheduled to transmit to the UE according to multiple PDCCH transmissions, the UE may be configured to provide individual ACK / NACK feedback for each of the corresponding scheduled transmissions. In some such cases, the UE may be configured not to expect physical uplink control channel (PUCCH)-physical uplink shared channel (PUSCH) conflicts for different TRPs, and scheduling implementations may be used to prevent such conflicts (e.g., where the UE does not expect overlapping PUCCH / PUSCH transmissions towards different TRPs). However, in some such cases, the UE may be configured with one or more multiplexing rules for using the PUCCH and PUSCH to transmit the corresponding uplink information. In some cases, the resources for PUCCH transmission may be associated with a value of a higher layer index based on each CORESET (e.g., an index). In this way, these indexes can be used to distinguish the TRPs to determine whether the transmission resources can overlap for different corresponding TRPs. In some cases, the PUSCH transmission may be distinguished by scheduling the control information (e.g., the CORESET) in the form of a specific target TRP.

[0095] In accordance with one or more of the above scheduling constraints and rules, the following techniques are provided herein by which a UE can determine how to apply DMRS bundling to cases where the UE receives scheduled transmissions that overlap with a set of scheduled transmissions associated with a DMRS bundle. For example, the UE can determine not to apply bundling and instead perform channel estimation individually for each transmission. Alternatively, the UE can determine to modify the bundling configuration, for example, to bundle the DMRS received before and / or after the overlapping transmission.

[0096] Figure 3 An example of a transmission timeline 300 that supports shared channel reference signal bundling and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is illustrated. In some examples, the transmission timeline 300 can implement aspects of the wireless communication system 100 as described with reference to Figure 1 In some examples, the transmission timeline 300 can implement aspects of the transmission timeline 200 as described with reference to Figure 2 The transmission timeline 300 illustrates a procedure for a second technique for reference signal bundling (e.g., DMRS bundling) to facilitate communication between a base station and a UE, where the base station and the UE can be examples of the corresponding devices described with reference to Figure 1 and 2 In some cases, for example, as shown in the example transmission timeline 300 of

[0097] The transmission timeline 300 shows communication between the UE and the base station over a channel that includes one or more TTIs (e.g., time slots), during which the base station and the UE can convey uplink and downlink transmissions. For example, across one or more time slots, the base station can transmit control signaling and downlink data transmissions to the UE in several PDSCH transmissions. The transmission timeline 300 shows a first PDSCH transmission 305, a second PDSCH transmission 310, a third PDSCH transmission 315, a fourth PDSCH transmission 320, and a fifth PDSCH transmission 325. Each PDSCH transmission can also be associated with control signaling (e.g., DCI).

[0098] In some cases, for example, as shown in the example transmission timeline 300 of Figure 3 The DCI for each PDSCH transmission can include one or more DCI bits (e.g., a single DCI bit) that the UE can use to "backtrack" DMRS bundling. In backtrack DMRS bundling, the DCI bit can be flipped to indicate a new set of bundled transmissions 240 starting from the time slot in which the UE receives the DCI. For example, as shown in Figure 3As shown, for the sequences of the first to fifth PDSCH transmissions, the corresponding DCI bits for each PDSCH transmission can respectively indicate values of 0, 0, 1, 1, and 1. Correspondingly, when the DCI bit for a PDSCH transmission is different from the DCI bit of a previous PDSCH transmission, the DCI bit can indicate that the corresponding PDSCH transmission is not bundled with the previous set of PDSCH transmissions. Similarly, when the DCI bit for a PDSCH transmission is the same as the DCI bit of a previous PDSCH transmission, the DCI bit can indicate that the corresponding PDSCH transmission is bundled with the previous PDSCH transmission. In this way, the base station can dynamically indicate to the UE the bundling configuration for upcoming communications.

[0099] Correspondingly, as Figure 2 shown, the DCI bits for both the first PDSCH transmission 305 and the second PDSCH transmission 310 are set to the value "0", indicating that the first PDSCH transmission 305 and the second PDSCH transmission 310 will be bundled in the first bundled transmission set 330. Then, as Figure 2 shown, based on the changed value of the DCI bit (e.g., from "0" to "1"), for the third PDSCH transmission 315, the DCI bit can change to the value "1". The fourth PDSCH transmission 320 and the fifth PDSCH transmission 325 can also have corresponding DCI bits with the value "1". Correspondingly, the UE can determine that a new bundling will start with the third PDSCH transmission 315, where the second bundled transmission set 335 can include the third PDSCH transmission 315, the fourth PDSCH transmission 320, and the fifth PDSCH transmission 325. The UE can use the DMRS included in each PDSCH transmission in the bundled PDSCH transmissions to perform channel estimation. For example, as Figure 3 shown, the UE can use the DMRS received in the first bundled transmission set 330 including the first PDSCH transmission 305 and the second PDSCH transmission 310 to perform channel estimation. Then, the UE can separately perform additional channel estimation using the DMRS received in the second bundled transmission set 335 including the third PDSCH transmission 315, the fourth PDSCH transmission 320, and the fifth PDSCH transmission 325. In this way, the base station can dynamically indicate to the UE the bundling configuration for upcoming communications.

[0100] In some cases, the base station can schedule a first transmission set (e.g., Figure 3The first to fifth PDSCH transmissions shown in [Figure] and a second transmission (or transmission set), where the second transmission may overlap in time and / or frequency with one or more transmissions of the first transmission set (e.g., occupy an overlapping set of time-frequency resources). For example, the base station may schedule the second transmission to use resources that overlap in time with the set of resources for which the base station has scheduled the first transmission set, but the second transmission may be scheduled to occupy resources that do not overlap in frequency with the set of resources used for the first transmission set. Alternatively, the base station may schedule the second transmission to use resources that overlap in both time and frequency with the set of resources for which the base station has scheduled the first transmission set. Techniques are provided herein by which a UE can determine how to apply DMRS bundling for such cases. For example, the UE may determine not to apply bundling and accordingly perform channel estimation individually for each transmission. Alternatively, the UE may determine to modify the bundling configuration, for example, to bundle the DMRS received before and / or after the overlapping transmission.

[0101] Figure 4 Illustrates an example of a transmission timeline 400 that supports shared channel reference signal bundling and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure. In some examples, the transmission timeline 400 may implement aspects of the wireless communication system 100 as described with reference to Figure 1 In some examples, the transmission timeline 400 may implement aspects of the transmission timeline as described with reference to Figure 2 and 3 The transmission timeline 400 illustrates an example of a transmission scheduled to be received by a UE using resources that at least partially overlap with the scheduled resources for a bundled transmission set from a base station to the UE. The base station and the UE may be examples of corresponding devices as described with reference to Figures 1 to 3

[0102] The transmission timeline 400 shows communication between the UE and the base station over a channel including one or more TTIs (e.g., time slots), and the base station and the UE may communicate uplink and downlink transmissions during the one or more TTIs. For example, across one or more time slots, the base station may transmit control signaling and downlink data transmissions to the UE in several scheduled PDSCH transmissions. The transmission timeline 400 shows five PDSCH transmissions scheduled on respective sets of time-frequency resources, including a first PDSCH transmission 405, a second PDSCH transmission 410, a third PDSCH transmission 415, a fourth PDSCH transmission 420, and a fifth PDSCH transmission 425 (e.g., shown as "PDSCH1", "PDSCH2", "PDSCH3", "PDSCH4", and "PDSCH5", respectively). As Figure 4 ​As shown in the example transmission timeline 400, each of the first through fifth PDSCH transmissions may be configured (e.g., via a first, previously received bundling configuration, e.g., received in DCI) to be processed according to a DMRS bundling mode.

[0103] In some cases, e.g., as Figure 4 shown in the example transmission timeline 400, the base station may schedule a sixth PDSCH transmission 435 to be transmitted from the base station to the UE, where the sixth PDSCH transmission 435 may be scheduled to use a set of time-frequency resources that at least partially overlaps with the time-frequency resources scheduled for the first bundled transmission set 430. For example, as Figure 4 shown, the sixth PDSCH transmission 435 may be scheduled to use time domain resources that overlap with the time domain resources used for the third PDSCH transmission 415 (e.g., the sixth PDSCH transmission 435 and the third PDSCH transmission 415 are scheduled simultaneously).

[0104] For such scenarios where the UE is scheduled to receive a second transmission (e.g., the sixth PDSCH transmission 435) using resources that at least partially overlap in time and / or frequency with the resources used for the first bundled transmission set 430 (e.g., the sixth PDSCH transmission 435 may be scheduled to use resources that overlap with the third PDSCH transmission 415 of the first bundled transmission set 430), the UE may determine a new bundling mode (e.g., modify or not modify the bundling mode indicated in a previously received bundling configuration). In some cases, the UE may determine the new bundling mode based on the UE's ability to receive simultaneous transmissions (e.g., the UE's ability to receive the third PDSCH transmission 415 and the sixth PDSCH transmission 435 using overlapping sets of time resources).

[0105] For example, if the UE may not be configured with the ability to receive concurrent transmissions, the UE may abort a lower-priority transmission. For example, the base station may have scheduled a sixth PDSCH transmission 435 after scheduling a third PDSCH transmission 415, and thus the base station may also indicate that the sixth PDSCH transmission 435 has a higher priority than the third PDSCH transmission 415 (e.g., belongs to a higher priority class). Accordingly, in this example, the UE may determine to abort the third PDSCH transmission 415. However, if the UE aborts the entire conflicting PDSCH transmission, e.g., the third PDSCH transmission 415, the UE may not be able to bundle each transmission in the first bundled transmission set 430. For example, since the first bundled transmission set 430 includes the third PDSCH transmission 415 (which will be aborted), a gap (e.g., a time gap) may be introduced in the time domain. If the duration of this time gap exceeds a corresponding (e.g., pre-configured) threshold, the UE may determine not to maintain the original bundling pattern. Similarly, if the duration of this time gap exceeds a corresponding threshold, the base station may also determine not to maintain the original bundling pattern.

[0106] Accordingly, several techniques are provided below by which the UE can determine a new bundling pattern in such cases. For example, according to a first technique, the UE can determine that there is no PDSCH transmission to be processed based on the bundled DMRS transmission. That is, the UE can process the DMRS transmission of each PDSCH transmission individually without applying any bundling to the DMRS transmission (e.g., perform channel estimation for each PDSCH transmission using the DMRS within that transmission and not the DMRS within other PDSCH transmissions). Additionally or alternatively, according to a second technique, the UE can determine to bundle these transmissions before the conflicting transmissions. For example, according to the second technique of the exemplary transmission timeline 400 of reference Figure 4 , the UE can bundle the DMRS of the first PDSCH transmission 405 and the second PDSCH transmission 410 to be received before the conflicting DMRS transmission (e.g., the DMRS of the first PDSCH transmission 405 and the second PDSCH transmission 410 can be used for channel estimation for receiving each of the first PDSCH transmission 405 and the second PDSCH transmission 410).

[0107] Additionally or alternatively, according to a third technique, the UE can determine to bundle these transmissions after the conflicting transmissions. For example, according to reference Figure 4For a third technique of the exemplary transmission timeline 400, the UE may bundle the DMRSs of the fourth PDSCH transmission 420 and the fifth PDSCH transmission 425 to be received after the conflicting DMRS transmissions. Additionally or alternatively, according to a fourth technique, the UE may determine to bundle these transmissions before and after the conflicting transmission, respectively. For example, according to the reference Figure 4 For a fourth technique of the exemplary transmission timeline 400, the UE may bundle the DMRSs of the first PDSCH transmission 405 and the second PDSCH transmission 410 in a first bundle, and the UE may bundle the DMRSs of the fourth PDSCH transmission 420 and the fifth PDSCH transmission 425 in a second bundle.

[0108] However, in some alternative examples, the UE may be configured with the ability to receive concurrent transmissions. In some cases, the UE may or may not have the ability to perform bundling on such concurrent transmissions. Accordingly, the following techniques are provided by which the UE can determine a new bundling pattern in such cases when the UE has one or more of these capabilities.

[0109] For example, in some cases, the UE may not be configured with the ability to perform bundling in the presence of concurrent PDSCH transmissions. Accordingly, the UE may perform bundling (or refrain from bundling) according to, for example, the techniques described above as if the UE were not able to receive concurrent transmissions. For example, the UE may process the DMRSs of each PDSCH transmission individually without bundling. Alternatively, the UE may bundle the DMRSs across PDSCH transmissions before and / or after the conflicting PDSCH transmissions.

[0110] Alternatively, in some cases, the UE may be configured with the ability to perform bundling in the presence of concurrent PDSCH transmissions that do not overlap in frequency, but may not be configured with the ability to perform bundling for concurrent PDSCH transmissions that overlap in frequency. For example, in some such cases, e.g., if the sixth PDSCH transmission 435 does not occupy frequency resources that overlap with the third PDSCH transmission 415, the UE may apply the original bundling mode regardless of the conflicting sixth PDSCH transmission 435. However, in some cases, if the sixth PDSCH transmission 435 occupies frequency resources that overlap (e.g., partially or fully) with the third PDSCH transmission 415, the original bundling mode may not be applied. In some cases, the UE may apply the original bundling mode to the overlapping set of resources, e.g., when the fast Fourier transform (FFT) operations used to receive the respective transmissions are not modified (e.g., the transmission occupies a fully overlapping set of resources). For example, if the third PDSCH transmission 415 and the sixth PDSCH transmission 435 are scheduled to use an overlapping set of frequency (and time) resources, the UE may perform bundling (or refrain from bundling) according to techniques such as those described above as if the UE were unable to receive simultaneous transmissions. For example, the UE may process the DMRS for each PDSCH transmission individually without bundling. Alternatively, the UE may bundle the DMRS across PDSCH transmissions before and / or after the conflicting PDSCH transmissions.

[0111] Alternatively, in some cases, the UE may be configured with the ability to perform bundling for simultaneous PDSCH transmissions that overlap in both time and frequency. In such cases, the UE may apply the original bundling mode regardless of the conflicting sixth PDSCH transmission 435, e.g., regardless of whether the sixth PDSCH transmission 435 occupies time and frequency resources that overlap with the time and frequency resources used for the third PDSCH transmission 415. Accordingly, the UE may determine not to modify the original bundling mode (e.g., the UE may process the PDSCH transmissions according to the originally indicated bundling configuration).

[0112] Figures 5A - 5C An example transmission timeline 500 supporting shared channel reference signal bundling and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is illustrated. In some examples, the transmission timeline 500 may implement aspects of the wireless communication system 100 as described with reference to Figure 1 In some examples, the transmission timeline 500 may implement aspects of the transmission timeline as described with reference to Figures 2 to 4 The transmission timeline 500 illustrates an example of a transmission scheduled for the UE to receive using resources that at least partially overlap with the scheduled resources for a bundled set of transmissions from the base station to the UE. The base station and the UE may be examples of corresponding devices as described with reference to Figures 1 to 4 ​

[0113] The transmission timeline 500 shows the communication between the UE and the base station over a channel including one or more TTIs (e.g., time slots), and the base station and the UE can convey uplink and downlink transmissions during the one or more TTIs. For example, across one or more time slots, the base station can transmit control signaling and downlink data transmissions to the UE in several scheduled PDSCH transmissions. Each of the transmission timelines 500 shows five PDSCH transmissions scheduled on a corresponding set of time-frequency resources, including a first PDSCH transmission 505, a second PDSCH transmission 510, a third PDSCH transmission 515, a fourth PDSCH transmission 520, and a fifth PDSCH transmission 525 (e.g., shown as "PDSCH1", "PDSCH2", "PDSCH3", "PDSCH4", and "PDSCH5" respectively). As Figures 5A - 5C shown in the example transmission timeline 500 of, each of the first through fifth PDSCH transmissions can be configured (e.g., via a first, previously received bundling configuration, e.g., received in DCI) to be processed according to a DMRS bundling pattern.

[0114] In some cases, e.g., as Figures 5A - 5C shown in each of the example transmission timelines 500 of, the base station can schedule a sixth PDSCH transmission 535 to be transmitted from the base station to the UE, where the sixth PDSCH transmission 535 can be scheduled to use a set of time-frequency resources that at least partially overlaps with the time-frequency resources of the plurality of PDSCH transmissions scheduled for the first bundled transmission set 530. For example, as Figures 5A - 5C shown in each of, the sixth PDSCH transmission 535 can be scheduled to use a time domain resource that at least partially overlaps with the time domain resources for the third PDSCH transmission 515 and the fourth PDSCH transmission 520. For example, in Figure 5A the sixth PDSCH transmission 535-a overlaps with a portion of the third PDSCH transmission 515-a and a portion of the fourth PDSCH transmission 520-a. In Figure 5B the sixth PDSCH transmission 535-b overlaps with the entire time resource set of the third PDSCH transmission 515-b and a portion of the fourth PDSCH transmission 520-b. In Figure 5C the sixth PDSCH transmission 535-c overlaps with the entire time resource sets of both the third PDSCH transmission 515-c and the fourth PDSCH transmission 520-c.

[0115] In each of these examples, for a PDSCH transmission that conflicts with only a single PDSCH transmission in the first beamformed transmission set 530, the UE may perform similar techniques as described herein. In some cases, the UE may forgo the lower-priority transmission. For example, the base station may indicate that the sixth PDSCH transmission 535 has a higher priority (e.g., belongs to a higher priority class) than the third PDSCH transmission 515 and / or the fourth PDSCH transmission 520. Accordingly, the UE may determine to forgo the third PDSCH transmission 515 and the fourth PDSCH transmission 520. Similar to as described above, if the duration of the time gap left by forgoing the third PDSCH transmission 515 and the fourth PDSCH transmission 520 exceeds a corresponding (e.g., previously configured) threshold, the UE may determine not to maintain the original DMRS beamforming pattern.

[0116] In such cases, the UE may perform beamforming similarly as described above. For example, the UE may process the DMRS for each PDSCH transmission individually without beamforming. Alternatively, the UE may beamform the DMRS across PDSCH transmissions before and / or after the conflicting PDSCH transmission (e.g., process the DMRS for the fifth PDSCH transmission 525 individually and beamform or not beamform the DMRS transmissions for the first PDSCH transmission 505 and the second PDSCH transmission 510).

[0117] Figures 6A - 6D An example transmission timeline 600 is illustrated that supports shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure. In some examples, the transmission timeline 600 may implement aspects of the wireless communication system 100 as described with reference to Figure 1 - Figures 2 to 5A - Figure 5C - Figures 1 to 5A - Figure 5C -

[0118] The transmission timeline 600 shows the communication between the UE and the base station over a channel including one or more TTIs (e.g., time slots), and the base station and the UE can convey uplink and downlink transmissions during the one or more TTIs. For example, across one or more time slots, the base station can transmit control signaling and downlink data transmissions to the UE in several scheduled PDSCH transmissions. Each of the transmission timelines 600 shows five PDSCH transmissions scheduled on a corresponding set of time-frequency resources, including a first PDSCH transmission 605, a second PDSCH transmission 610, a third PDSCH transmission 615, a fourth PDSCH transmission 620, and a fifth PDSCH transmission 625 (e.g., shown as "PDSCH1", "PDSCH2", "PDSCH3", "PDSCH4", and "PDSCH5" respectively). As Figures 6A - 6D shown in the example transmission timeline 600 of

[0119] In some cases, for example, as Figures 6A - 6D shown in each of the example transmission timelines 600 of Figures 6A - 6D the base station can schedule a sixth PDSCH transmission 630 to be transmitted from the base station to the UE, where the sixth PDSCH transmission 630 can be scheduled to use a set of time-frequency resources that at least partially overlaps with the time-frequency resources of at least one PDSCH transmission in the first transmission set configured for DMRS bundling (e.g., the first to fifth PDSCH transmissions). In some cases, the third PDSCH transmission 615 can include one (or more) corresponding DMRS transmissions, such as a first DMRS transmission 635 and a second DMRS transmission 640. As Figures 6A - 6D shown in each of Figure 6A , Figure 6B and Figure 6C the sixth PDSCH transmission 630 can be scheduled to use a time domain resource that at least partially overlaps with the time domain resource used for the third PDSCH transmission 615, and this time domain resource can overlap with one of these DMRS transmissions, where, for example, in Figure 6A the sixth PDSCH transmission 630-a overlaps with a part of the third PDSCH transmission 615-a that includes the second DMRS transmission 640-a but does not include the first DMRS transmission 635-a. In Figure 6BIn , a part of the sixth PDSCH transmission 630-b that includes the second DMRS transmission 640-b but does not include the first DMRS transmission 635-b overlaps with a part of the third PDSCH transmission 615-b. In Figure 6C In , a part of the sixth PDSCH transmission 630-c that includes the second DMRS transmission 640-c but does not include the first DMRS transmission 635-c overlaps with a part of the third PDSCH transmission 615-c. In Figure 6D In , a part of the sixth PDSCH transmission 630-d overlaps with a part of the third PDSCH transmission 615-d but does not overlap with either the first DMRS transmission 635-d or the second DMRS transmission 640-d.

[0120] In some cases, the UE can determine a beamforming pattern (e.g., a beamforming pattern modified from the original beamforming configuration) based on whether a conflicting transmission (e.g., the sixth PDSCH transmission 630) overlaps with a DMRS transmission such as a beamformed transmission. In each of these examples, the UE can discard the second DMRS transmission 640 that conflicts with the sixth PDSCH transmission 630. Then, the UE can perform a similar beamforming adjustment as described above, e.g., referring to Figure 4 and Figures 5A - 5C . For example, as shown in Figure 6A , in some cases, the UE can beamform the DMRS of the sixth PDSCH transmission 630-a that does not conflict with it. For example, in the first beamformed transmission set 645-a, the UE can beamform the DMRS of the first PDSCH transmission 605-a, the DMRS of the second PDSCH transmission 610-a, and the first DMRS 635-a of the third PDSCH transmission 615-a (e.g., the DMRS that the sixth PDSCH transmission 630-a does not conflict with). Additionally or alternatively, in the second beamformed transmission set 650-a, the UE can beamform the DMRS of the fourth PDSCH transmission 620-a and the DMRS of the fifth PDSCH transmission 625-a.

[0121] As shown in Figure 6B , in some cases, the UE can beamform the DMRS of each PDSCH transmission that does not conflict with the sixth PDSCH transmission 630-b. For example, in the first beamformed transmission set 645-b, the UE can beamform the DMRS of the first PDSCH transmission 605-b and the DMRS of the second PDSCH transmission 610-b. Additionally or alternatively, in the second beamformed transmission set 650-b, the UE can beamform the DMRS of the fourth PDSCH transmission 620-b and the DMRS of the fifth PDSCH transmission 625-b. In Figure 6BIn the example, the UE may not include the first DMRS 635-a of the third PDSCH transmission 615-a (e.g., the DMRS that does not conflict with the sixth PDSCH transmission 630-a) in any beamformed transmission set.

[0122] As Figure 6C shown, in some cases, the UE may not beamform the DMRS of these PDSCH transmissions based on the DMRS conflict between the sixth PDSCH transmission 630-c and any of these PDSCH transmissions. For example, the UE may process the DMRS of each of these PDSCH transmissions individually (e.g., without beamforming). As Figure 6C shown, the UE may process the DMRS in the first window 645-c including the first PDSCH transmission 605-c, the UE may process the DMRS in the second window 650-c including the second PDSCH transmission 610-c, the UE may process the DMRS in the third window including the fourth PDSCH transmission 620-c, and the UE may process the DMRS in the fourth window 660-c including the fifth PDSCH transmission 625-c. In some cases, for example, if the UE does not abandon the third PDSCH transmission 615-c, the UE may process the DMRS in an additional window including the third PDSCH transmission 615-c.

[0123] As Figure 6D shown, in some cases, the UE may not beamform the DMRS of these PDSCH transmissions based on the conflict between the sixth PDSCH transmission 630-d and any of these PDSCH transmissions. For example, the UE may process the DMRS of each of these PDSCH transmissions individually (e.g., without beamforming). As Figure 6D shown, the UE may process the DMRS in the first window 645-d including the first PDSCH transmission 605-d, the UE may process the DMRS in the second window 650-d including the second PDSCH transmission 610-d, the UE may process the DMRS in the third window including the fourth PDSCH transmission 620-d, and the UE may process the DMRS in the fourth window 660-d including the fifth PDSCH transmission 625-d.

[0124] Alternatively, in some cases, referring to Figure 6D, the UE may apply the beamforming pattern of the original beamforming configuration. For example, based on the sixth PDSCH transmission 630-d not conflicting with any DMRS of these PDSCH transmissions, in some cases, the UE may apply the beamforming pattern of the original beamforming configuration and / or the UE may perform beamforming as described above similarly. For example, the UE may beamform the DMRS across PDSCH transmissions before and / or after the conflicting PDSCH transmissions (e.g., beamform the DMRS transmissions of the first PDSCH transmission 605-d and the second PDSCH transmission 610-d and / or beamform the DMRS transmissions of the fourth PDSCH transmission 620-d and the fifth PDSCH transmission 625-d).

[0125] Figure 7 An example of a process flow 700 that supports shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is illustrated. In some examples, the process flow 700 may be implemented by aspects of the wireless communication system 100 as described with reference to Figure 1 . The process flow 700 may include a base station 105-a and a UE 115-a, which may be examples of the corresponding devices described with reference to Figures 1 to 6A - Figure 6D . The following alternative examples may be implemented, where some steps are performed in a different order than described or not performed at all. In some cases, the steps may include additional features not mentioned below, or further steps may be added.

[0126] At 705, the base station 105-b may transmit a beamforming configuration to the UE 115-a, and the UE 115-a may receive the beamforming configuration from the base station 105-a. In some cases, the base station 105-a may transmit, for example, a DCI message in control signaling. In some cases, the base station 105-a may signal the beamforming configuration in a scheduling message or signal the beamforming configuration with a scheduling message (e.g., the scheduling message schedules the first scheduled transmission set and / or the second scheduled transmission).

[0127] At 710, the UE 115-a may identify a first scheduled transmission set (e.g., to be conveyed via a shared channel), where the first scheduled transmission set may be associated with a first reference signal beamforming pattern. In some cases, the UE 115-a may identify the first scheduled transmission set based on a scheduling message and / or control signaling (e.g., as may have been received together with the beamforming configuration at 705).

[0128] At 715, UE 115-a may identify a second scheduled transmission (e.g., to be conveyed via a shared channel, where the second scheduled transmission may at least partially overlap in time and / or frequency with at least one transmission in the first set of scheduled transmissions). In some cases, UE 115-a may identify the second scheduled transmission based on a scheduling message and / or control signaling (e.g., as may have been received at 705 together with a beamforming configuration).

[0129] At 720, UE 115-a may identify the beamforming capabilities of UE 115-a. For example, UE 115-a may be configured with the ability to receive beamformed transmissions that overlap in time with conflicting transmissions (or the ability to receive non-beamformed transmissions) and / or the ability to receive beamformed transmissions that overlap in time and frequency with conflicting transmissions.

[0130] At 725, UE 115-a may determine a second reference signal beamforming pattern for the first set of scheduled transmissions based at least in part on identifying the second scheduled transmission.

[0131] In some cases, at 725, UE 115-a may determine to individually process the reference signals for each of the transmissions in the first set of scheduled transmissions. In some cases, UE 115-a may determine that the second scheduled transmission overlaps in time with the reference signals of at least one transmission in the first set of scheduled transmissions. For example, UE 115-a may determine to individually process the reference signals for each of the transmissions in the first set of scheduled transmissions based on UE 115-a's ability (or lack thereof) to receive and / or process overlapping transmissions (e.g., according to the capabilities of UE 115-a that UE 115-a may have identified at 720).

[0132] In some cases, at 725, UE 115-a may determine to beamform the reference signals across a subset of the first set of scheduled transmissions. In some cases, these reference signals may include the reference signals of the scheduled transmissions of at least one of the transmissions in the first set of scheduled transmissions (e.g., as may have been received from base station 105-a at 730 by UE 115-a), where the scheduled transmission may at least partially overlap with the second scheduled transmission. In some cases, the reference signal may exclude the reference signals of the scheduled transmissions that at least partially overlap with the second scheduled transmission. Additionally or alternatively, the reference signals of the subset of the first set of scheduled transmissions may be scheduled before the second scheduled transmission. Additionally or alternatively, the reference signals of the subset of the first set of scheduled transmissions may be scheduled after the second scheduled transmission.

[0133] In some cases, at 725, UE 115-a may modify the first reference signal beamforming pattern (e.g., discard or unbundle overlapping transmissions) based on determining that at least a portion of the frequency resources associated with the second scheduled transmission do not overlap with the frequency resources associated with at least one transmission in the first scheduled transmission set. In some cases, at 725, UE 115-a may determine that the second reference signal beamforming pattern is the same as the first reference signal beamforming pattern based on determining that the frequency resources associated with at least one transmission in the first scheduled transmission set completely overlap with the frequency resources associated with the second scheduled transmission (e.g., based on the ability of UE 115-a to receive beamformed transmissions that overlap in time and frequency with the conflicting transmission).

[0134] In some cases, at 725, UE 115-a may determine a second reference signal beamforming pattern for the first scheduled transmission set based on the beamforming capabilities of UE 115-a (e.g., as UE 115-a may have identified at 720). In some cases, at 725, UE 115-a may determine a second reference signal beamforming pattern for the first scheduled transmission set based on the beamforming configuration (as UE 115-a may have received from base station 105-a at 705).

[0135] At 730, base station 105-a may transmit the first scheduled transmission set (e.g., PDSCH transmission) to UE 115-a. UE 115-a may correspondingly receive at least a subset of the first scheduled transmission set (which subset includes, for example, transmissions that do not overlap with the conflicting transmission) from base station 105-a on the shared channel in the second reference signal beamforming pattern.

[0136] At 735, base station 105-a may transmit a second scheduled transmission (e.g., a further PDSCH transmission) to UE 115-a via the shared channel, and UE 115-a may receive the second scheduled transmission from base station 105-a via the shared channel. In some cases, the first scheduled transmission set may be transmitted from a first transmitter and the second scheduled transmission may be transmitted from a second transmitter (e.g., at different antenna panels and / or different TRPs of base station 105-a). Alternatively, the first scheduled transmission set may be transmitted from a transmitter at a first device, and the second scheduled transmission may be transmitted from a transmitter at a second device, where, for example, one of the first or second devices may be base station 105-a and the other device may be another wireless device (e.g., co-located with base station 105-a, or alternatively, located at a different geographical location from base station 105-a).

[0137] Figure 8Block diagram 800 of a device 805 that supports beamforming of a shared channel reference signal set and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is shown. The device 805 may be an example of aspects of the UE 115 as described herein. The device 805 may include a receiver 810, a communication manager 815, and a transmitter 820. The device 805 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0138] The receiver 810 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to beamforming of a shared channel reference signal set and multiple concurrent shared channel transmissions, etc.). The information may be passed to other components of the device 805. The receiver 810 may be an example of aspects of the transceiver 1120 described with reference to Figure 11 The receiver 810 may utilize a single antenna or an antenna array.

[0139] The communication manager 815 may identify a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern; identify a second scheduled transmission for the shared channel that at least partially overlaps in time with at least one transmission in the first scheduled transmission set; determine a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission; receive at least a subset of the first scheduled transmission set via the shared channel based on the second reference signal beamforming pattern; and receive the second scheduled transmission via the shared channel. The communication manager 815 may be an example of aspects of the communication manager 1110 described herein.

[0140] The communication manager 815 or its subcomponents may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 815 or its subcomponents may be executed by a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0141] The communication manager 815 or its subcomponents may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to aspects of the present disclosure, the communication manager 815 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents may be combined with one or more other hardware components, the one or more other hardware components including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or combinations thereof.

[0142] The transmitter 820 may transmit signals generated by other components of the device 805. In some examples, the transmitter 820 may co-reside in a transceiver module with the receiver 810. For example, the transmitter 820 may be an example of aspects of the transceiver 1120 described with reference to Figure 11 The transmitter 820 may utilize a single antenna or an antenna array.

[0143] Figure 9 Block diagram 900 of a device 905 supporting a shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is shown. The device 905 may be an example of aspects of the device 805 or UE 115 described herein. The device 905 may include a receiver 910, a communication manager 915, and a transmitter 940. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0144] The receiver 910 may receive information, such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to shared channel reference signal beamforming and multiple concurrent shared channel transmissions, etc.). The information may be passed to other components of the device 905. The receiver 910 may be an example of aspects of the transceiver 1120 described with reference to Figure 11 The receiver 910 may utilize a single antenna or an antenna array.

[0145] The communication manager 915 may be an example of aspects of the communication manager 815 described herein. The communication manager 915 may include a transmission scheduling module 920, a reference signal beamforming mode module 925, a beamformed transmission module 930, and a scheduled transmission module 935. The communication manager 915 may be an example of aspects of the communication manager 1110 described herein.

[0146] The transmission scheduling module 920 can identify a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern; and identify a second scheduled transmission for the shared channel, the second scheduled transmission being at least partially temporally overlapped with at least one transmission in the first scheduled transmission set.

[0147] The reference signal beamforming pattern module 925 can determine a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission.

[0148] The beamformed transmission module 930 can receive at least a subset of the first scheduled transmission set via the shared channel based on the second reference signal beamforming pattern.

[0149] The scheduled transmission module 935 can receive the second scheduled transmission via the shared channel.

[0150] The transmitter 940 can transmit signals generated by other components of the device 905. In some examples, the transmitter 940 can be co-located with the receiver 910 in a transceiver module. For example, the transmitter 940 can be an example of aspects of the transceiver 1120 described with reference to Figure 11 The transmitter 940 can utilize a single antenna or an antenna array.

[0151] Figure 10 FIG. 1000 is a block diagram of a communication manager 1005 supporting shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure. The communication manager 1005 can be an example of aspects of the communication manager 815, the communication manager 915, or the communication manager 1110 described herein. The communication manager 1005 can include a transmission scheduling module 1010, a reference signal beamforming pattern module 1015, a beamformed transmission module 1020, a scheduled transmission module 1025, a beamforming configuration module 1030, and a beamforming capability module 1035. Each of these modules can communicate directly or indirectly with each other (e.g., via one or more buses).

[0152] The transmission scheduling module 1010 can communicate with the scheduled transmission module 1025 to obtain information 1040 to identify a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern. In some examples, the transmission scheduling module 1010 can also identify a second scheduled transmission for the shared channel, which is at least partially temporally overlapped with at least one transmission in the first scheduled transmission set.

[0153] The transmission scheduling module 1010 may convey information 1045 related to the first scheduled transmission set and the second scheduled transmission to the reference signal beamforming pattern module 1015. The reference signal beamforming pattern module 1015 may determine a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission by the transmission scheduling module 1010.

[0154] In some examples, the reference signal beamforming pattern module 1015 may determine that the reference signals of the second scheduled transmission and at least one transmission in the first scheduled transmission set overlap in time via the information 1045 from the transmission scheduling module 1010 or the information 1050 conveyed from the scheduled transmission module 1025.

[0155] In some examples, the reference signal beamforming pattern module 1015 may determine to beamform the reference signals across a subset of the first scheduled transmission set.

[0156] In some examples, the reference signal beamforming pattern module 1015 may modify the first reference signal beamforming pattern based on the UE's ability to receive the second scheduled transmission and at least one transmission in the first scheduled transmission set to obtain the second reference signal beamforming pattern.

[0157] In some examples, the reference signal beamforming pattern module 1015 may modify the first reference signal beamforming pattern based on determining that at least a portion of the frequency resources associated with the second scheduled transmission do not overlap with the frequency resources associated with at least one transmission in the first scheduled transmission set. Such determination may be performed by the transmission scheduling module 1010 using the information 1040 from the scheduled transmission module 1025.

[0158] In some examples, the reference signal beamforming pattern module 1015 may determine that the second reference signal beamforming pattern is to be the same as the first reference signal beamforming pattern based on determining that the frequency resources associated with at least one transmission in the first scheduled transmission set completely overlap with the frequency resources associated with the second scheduled transmission. Such determination may be performed by the transmission scheduling module 1010 using the information 1040 from the scheduled transmission module 1025.

[0159] In some cases, the beamformed reference signal includes at least one reference signal of a scheduled transmission in the first scheduled transmission set, and the scheduled transmission overlaps at least partially with the second scheduled transmission.

[0160] In some cases, the beamformed reference signal excludes the reference signal of the scheduled transmission that overlaps at least partially with the second scheduled transmission.

[0161] In some cases, the beamformed reference signals of a subset of the first scheduled transmission set are scheduled before the second scheduled transmission.

[0162] In some cases, the beamformed reference signals of a subset of the first scheduled transmission set are scheduled after the second scheduled transmission.

[0163] The beamformed transmission module 1020 may receive at least a subset of the first scheduled transmission set via a shared channel based on a second reference signal beamforming pattern, and the second reference signal beamforming pattern may be communicated from the reference signal beamforming pattern module 1015 to the beamformed transmission module 1020 via beamforming pattern information 1055.

[0164] In some examples, the beamformed transmission module 1020 may determine to individually process the reference signals of each transmission in the first scheduled transmission set.

[0165] The scheduled transmission module 1025 may receive the second scheduled transmission via the shared channel.

[0166] In some cases, the first scheduled transmission set is transmitted from a first transmitter, while the second scheduled transmission is transmitted from a second transmitter.

[0167] The beamforming configuration module 1030 may receive a beamforming configuration, where the second reference signal beamforming pattern for the first scheduled transmission set is determined based on the beamforming configuration. The beamforming configuration may be received from a network (e.g., a base station) and communicated to the reference signal beamforming pattern module 1015 via information 1060.

[0168] The beamforming capability module 1035 may identify the beamforming capability of the UE, where the second reference signal beamforming pattern for the first scheduled transmission set is determined based on the beamforming capability of the UE. For example, the beamforming capability module may communicate information 1065 about the UE capabilities to the reference signal beamforming pattern module 1015.

[0169] Figure 11 FIG. shows a diagram of a system 1100 of a device 1105 supporting shared channel reference signal beamforming and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure. The device 1105 may be an example of the device 805, the device 905, or the UE 115 described herein or include components thereof. The device 1105 may include components for two-way voice and data communication, which include components for transmitting and receiving communications, including a communication manager 1110, an I / O controller 1115, a transceiver 1120, an antenna 1125, a memory 1130, and a processor 1140. These components may be in electronic communication via one or more buses (e.g., bus 1145).

[0170] The communication manager 1110 may identify a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern; identify a second scheduled transmission for the shared channel that at least partially overlaps in time with at least one transmission in the first scheduled transmission set; determine a second reference signal beamforming pattern for the first scheduled transmission set based on identifying the second scheduled transmission; receive at least a subset of the first scheduled transmission set via the shared channel based on the second reference signal beamforming pattern; and receive the second scheduled transmission via the shared channel.

[0171] The I / O controller 1115 may manage the input and output signals of the device 1105. The I / O controller 1115 may also manage peripheral devices not integrated into the device 1105. In some cases, the I / O controller 1115 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1115 may utilize an operating system, such as or another known operating system. In other cases, the I / O controller 1115 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, the I / O controller 1115 may be implemented as part of a processor. In some cases, a user may interact with the device 1105 via the I / O controller 1115 or via hardware components controlled by the I / O controller 1115.

[0172] The transceiver 1120 may communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1120 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1120 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0173] In some cases, the wireless device may include a single antenna 1125. However, in some cases, the device may have more than one antenna 1125, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0174] The memory 1130 may include RAM and ROM. The memory 1130 may store computer-readable, computer-executable code 1135 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 1130 may particularly include a basic input / output system (BIOS), which may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0175] Processor 1140 may include intelligent hardware devices (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1140 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 1140. Processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1130) to cause device 1105 to perform various functions (e.g., functions or tasks supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions).

[0176] Code 1135 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. Code 1135 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 1135 may not be directly executed by processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0177] Figure 12 A flowchart illustrating a method 1200 for supporting beamforming of shared channel reference signals and multiple concurrent shared channel transmissions in accordance with aspects of the present disclosure is shown. Operations of method 1200 may be implemented by the UE 115 or its components as described herein. For example, operations of method 1200 may be performed by a communication manager as described with reference to Figures 8 to 11 as described. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the following functions.

[0178] At 1205, the UE may identify a first scheduled transmission set for a shared channel, the first scheduled transmission set being associated with a first reference signal beamforming pattern. The operation at 1205 may be performed according to the methods described herein. In some examples, aspects of the operation at 1205 may be performed by a transmission scheduling module as described with reference to Figures 8 to 11 as described.

[0179] At 1210, the UE may identify a second scheduled transmission for the shared channel that at least partially overlaps in time with at least one transmission in the first scheduled transmission set. The operation at 1210 may be performed according to the methods described herein. In some examples, aspects of the operation at 1210 may be performed by a transmission scheduling module as described with reference to Figures 8 to 11 as described.

[0180] At 1215, the UE may determine a second reference signal beamforming pattern for a first set of scheduled transmissions based on identifying a second scheduled transmission. The operations at 1215 may be performed according to the methods described herein. In some examples, aspects of the operations at 1215 may be performed by a reference signal beamforming pattern module as described with reference to Figures 8 to 11 as described.

[0181] At 1220, the UE may receive at least a subset of the first set of scheduled transmissions via a shared channel based on the second reference signal beamforming pattern. The operations at 1220 may be performed according to the methods described herein. In some examples, aspects of the operations at 1220 may be performed by a beamformed transmission module as described with reference to Figures 8 to 11 as described.

[0182] At 1225, the UE may receive a second scheduled transmission via the shared channel. The operations at 1225 may be performed according to the methods described herein. In some examples, aspects of the operations at 1225 may be performed by a scheduled transmission module as described with reference to Figures 8 to 11 as described.

[0183] Note that the methods described herein describe possible implementations, and the operations and steps may be rearranged or otherwise modified and other implementations are possible. Additionally, aspects from two or more methods may be combined.

[0184] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applied to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applied to various other wireless communication systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0185] The information and signals described herein may be represented using any of a variety of different arts and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0186] The various illustrative blocks and components described in connection with the disclosure herein can be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0187] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope of the disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software, hardware, firmware, hardwiring, or any combination thereof executed by a processor. The features implementing the functions can also be physically located in various places, including being distributed such that portions of the functions are implemented at different physical locations.

[0188] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage media can be any available media that can be accessed by a general or special purpose computer. By way of example and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general or special purpose computer, or a general or special purpose processor. Likewise, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks usually reproduce data magnetically and discs reproduce data optically with lasers. Combinations of the above media are also included within the scope of computer-readable media.

[0189] As used herein, including in the claims, the "or" used in a list of items (e.g., a list of items accompanied by language such as "at least one of" or "one or more of") indicates an inclusive listing such that, for example, the listing of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be construed as reciting a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0190] In the drawings, like components or features may have the same reference numeral. Additionally, each of the same type of components may be distinguished by following the reference numeral with a dash and a second label that differentiates between like components. If only the first reference numeral is used in the specification, the description may apply to any one of the like components having the same first reference numeral regardless of the second reference numeral, or any other subsequent reference numerals.

[0191] The description set forth herein with reference to the drawings describes example configurations and does not represent all examples that may be implemented or that fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not mean "superior to" or "better than" other examples. This detailed description includes specific details to provide an understanding of the described technologies. However, the technologies may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0192] The description provided herein is to enable a person of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to a person of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a User Equipment (UE), comprising: receiving one or more control messages scheduling a first set of transmissions and a second transmission for a shared channel, wherein the first scheduled set of transmissions is associated with a first reference signal beamforming pattern, and wherein the second scheduled transmission at least partially overlaps in time with at least one transmission in the first scheduled set of transmissions; receiving at least a subset of the first scheduled set of transmissions via the shared channel at least partially based on a second reference signal beamforming pattern, wherein the second reference signal beamforming pattern is at least partially based on the second scheduled transmission; and receiving the second scheduled transmission via the shared channel.

2. The method of claim 1, further comprising: individually processing reference signals of each transmission in the first scheduled set of transmissions at least partially based on the second reference signal beamforming pattern.

3. The method of claim 2, wherein determining the second reference signal beamforming pattern comprises: determining that the second scheduled transmission overlaps in time with reference signals of the at least one transmission in the first scheduled set of transmissions.

4. The method of claim 1, further comprising: beamforming reference signals across a subset of the first scheduled set of transmissions at least partially based on the second reference signal beamforming pattern.

5. The method of claim 4, wherein the beamformed reference signals include at least one reference signal of a scheduled transmission of the at least one transmission in the first scheduled set of transmissions, the scheduled transmission at least partially overlapping with the second scheduled transmission.

6. The method of claim 4, wherein the beamformed reference signals exclude reference signals of scheduled transmissions that at least partially overlap with the second scheduled transmission.

7. The method of claim 4, wherein the beamformed reference signals of the subset of the first scheduled set of transmissions are scheduled before the second scheduled transmission.

8. The method of claim 4, wherein the beamformed reference signals of the subset of the first scheduled set of transmissions are scheduled after the second scheduled transmission.

9. The method of claim 1, further comprising: modifying the first reference signal beamforming pattern to obtain the second reference signal beamforming pattern at least partially based on the UE's ability to receive the second scheduled transmission and the at least one transmission in the first scheduled set of transmissions.

10. The method of claim 1, further comprising: modifying the first reference signal beamforming pattern to obtain the second reference signal beamforming pattern when at least a portion of the frequency resources associated with the second scheduled transmission do not overlap with the frequency resources associated with the at least one transmission in the first scheduled set of transmissions.

11. The method according to claim 1, wherein when the frequency resources associated with the at least one transmission in the first scheduled transmission set completely overlap with the frequency resources associated with the second scheduled transmission, the second reference signal beamforming pattern is the same as the first reference signal beamforming pattern.

12. The method according to claim 1, wherein the first scheduled transmission set is transmitted from a first transmitter, and the second scheduled transmission is transmitted from a second transmitter.

13. The method according to claim 1, further comprising: receiving a beamforming configuration, wherein the second reference signal beamforming pattern is at least partially based on the beamforming configuration.

14. The method according to claim 1, wherein the second reference signal beamforming pattern is at least partially based on the beamforming capability of the UE.

15. An apparatus for wireless communication at a user equipment (UE), comprising: a processor, a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive one or more control messages scheduling a first transmission set and a second transmission for a shared channel, wherein the first scheduled transmission set is associated with a first reference signal beamforming pattern, and wherein the second scheduled transmission at least partially overlaps in time with at least one transmission in the first scheduled transmission set; receive at least a subset of the first scheduled transmission set via the shared channel at least partially based on a second reference signal beamforming pattern, wherein the second reference signal beamforming pattern is at least partially based on the second scheduled transmission; and receive the second scheduled transmission via the shared channel.

16. The apparatus according to claim 15, wherein the instructions are further executable by the processor to cause the apparatus to: individually process the reference signals of each transmission in the first scheduled transmission set at least partially based on the second reference signal beamforming pattern.

17. The apparatus according to claim 16, wherein the second reference signal beamforming pattern is at least partially based on the second scheduled transmission overlapping in time with the reference signals of the at least one transmission in the first scheduled transmission set.

18. The apparatus according to claim 15, wherein the instructions are further executable by the processor to cause the apparatus to: beamform the reference signals across a subset of the first scheduled transmission set at least partially based on the second reference signal beamforming pattern.

19. The apparatus according to claim 18, wherein the beamformed reference signals include at least one reference signal of a scheduled transmission of the at least one transmission in the first scheduled transmission set, the scheduled transmission at least partially overlapping with the second scheduled transmission.

20. The apparatus according to claim 18, wherein the beamformed reference signals exclude the reference signals of the scheduled transmissions at least partially overlapping with the second scheduled transmission.

21. The apparatus according to claim 18, wherein the beamformed reference signals of the subset of the first scheduled transmission set are scheduled before the second scheduled transmission.

22. The apparatus according to claim 18, wherein the beamformed reference signals of the subset of the first scheduled transmission set are scheduled after the second scheduled transmission.

23. The apparatus according to claim 15, wherein the instructions are further executable by the processor to cause the apparatus to: Modify the first reference signal beamforming pattern to obtain the second reference signal beamforming pattern at least in part based on the UE's ability to receive the second scheduled transmission and at least one of the transmissions in the first scheduled transmission set.

24. The apparatus according to claim 15, wherein the instructions are further executable by the processor to cause the apparatus to: Modify the first reference signal beamforming pattern to obtain the second reference signal beamforming pattern when at least a portion of the frequency resources associated with the second scheduled transmission do not overlap with the frequency resources associated with at least one of the transmissions in the first scheduled transmission set.

25. The apparatus according to claim 15, wherein when the frequency resources associated with at least one of the transmissions in the first scheduled transmission set completely overlap with the frequency resources associated with the second scheduled transmission, the second reference signal beamforming pattern is the same as the first reference signal beamforming pattern.

26. The apparatus according to claim 15, wherein the first scheduled transmission set is transmitted from a first transmitter and the second scheduled transmission is transmitted from a second transmitter.

27. The apparatus according to claim 15, wherein the instructions are further executable by the processor to cause the apparatus to: Receive a beamforming configuration, wherein the second reference signal beamforming pattern is at least in part based on the beamforming configuration.

28. The apparatus according to claim 15, wherein the second reference signal beamforming pattern is at least in part based on the beamforming ability of the UE.

29. An apparatus for wireless communication at a user equipment (UE), comprising: means for receiving one or more control messages scheduling a first transmission set for a shared channel and a second transmission, wherein the first scheduled transmission set is associated with a first reference signal beamforming pattern and wherein the second transmission overlaps at least in part in time with at least one of the transmissions in the first scheduled transmission set; means for receiving at least a subset of the first scheduled transmission set via the shared channel at least in part based on a second reference signal beamforming pattern, wherein the second reference signal beamforming pattern is at least in part based on a second scheduled transmission; and means for receiving the second scheduled transmission via the shared channel.

30. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code including instructions executable by a processor for the following operations: Receive one or more control messages scheduling a first transmission set for a shared channel and a second transmission, wherein the first scheduled transmission set is associated with a first reference signal beamforming pattern, and wherein the second transmission at least partially overlaps in time with at least one transmission in the first scheduled transmission set; Receive at least a subset of the first scheduled transmission set via the shared channel based at least in part on a second reference signal beamforming pattern, wherein the second reference signal beamforming pattern is at least partially based on a second scheduled transmission; And Receive the second scheduled transmission via the shared channel.

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