Single frequency network transmission scheme for sounding reference signals

Abstract

Methods, systems, and devices for wireless communication are described. Some wireless communication systems may support single frequency network (SFN) signaling to increase signal strength and reliability for uplink and downlink data channel communications. In some systems, a user equipment (UE) may receive a control message indicating a configuration of an uplink sounding reference signal (SRS) communication scheme for communicating one or more SRS. The control message may indicate respective antenna ports of the UE for transmitting the one or more SRSs and each associated with at least two directional beams. The UE may then transmit the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

Description

Technical Field

[0001] The following generally relates to wireless communication and, more specifically, to a single-frequency network (SFN) transmission scheme for sounding reference signals (SRS). Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be capable of supporting communication with multiple users by sharing available system resources (e.g., 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 techniques such as code-division multiple access (CDMA), time-division multiple access (TDMA), frequency-division multiple access (FDMA), orthogonal FDMA (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, each supporting wireless communication of communication devices, which may be referred to as user equipment (UE). Summary of the Invention

[0003] The described techniques relate to improved methods, systems, devices, and apparatuses that support a single-frequency network (SFN) transmission scheme for sounding reference signals (SRS). For example, the described techniques use an SFN communication scheme to provide support for uplink transmission to increase uplink coverage and throughput in a wireless communication system. To further support communication in an SFN, a user equipment (UE) may be configured to use the SFN communication scheme to transmit an uplink SRS so that the network can estimate uplink channel quality. In such embodiments, the UE may receive a control message (e.g., a radio resource control (RRC) message, a downlink control information (DCI) message, a media access control-control element (MAC-CE), or any combination thereof) indicating the configuration of the SFN communication scheme for transmitting one or more uplink SRSs. For example, a corresponding antenna port of the UE (assigned to transmit one or more uplink SRSs) may be associated with at least two directional beams. Subsequently, based on the received configuration, the UE may transmit the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0004] A method for wireless communication at a UE is described. The method may include: receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting the one or more SRSs are each associated with at least two directional beams; and transmitting the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0005] An apparatus for wireless communication at a UE is described. The apparatus may include at least one processor and a memory coupled to the at least one processor, the memory storing instructions that can be executed by the at least one processor (e.g., directly, indirectly, without preprocessing, after preprocessing) to cause the UE to: receive a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting the one or more SRSs are each associated with at least two directional beams; and transmit the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0006] Another apparatus for wireless communication at a UE is described. The apparatus may include: means for receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting the one or more SRSs are each associated with at least two directional beams; and means for transmitting the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0007] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions that can be executed by at least one processor to: receive a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting the one or more SRSs are each associated with at least two directional beams; and transmit the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0008] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: receiving a DCI message including an SRS resource indicator, a transmit precoding indicator, or both, the SRS resource indicator, the transmit precoding indicator, or both including an indication of at least two precoders to be applied to at least two directional beams; and transmitting an uplink data channel via the at least two directional beams according to the at least two precoders and the SFN communication scheme.

[0009] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the uplink data channel includes a codebook-based uplink data channel, and the at least two pre-coders may be based on the at least two directional beams associated with the SFN communication scheme for transmitting the one or more SRSs.

[0010] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the uplink data channel includes a non-codebook-based uplink data channel, and the at least two pre-coders may be determined based on the at least two directional beams associated with the SFN communication scheme for transmitting a subset of the one or more SRSs.

[0011] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for performing the following: receiving two or more SRS resource indicators, two or more transmit pre-coding indicators, or a combination thereof, including an indication of the at least two pre-coders to be applied to the at least two directional beams; and transmitting the uplink data channel via the at least two directional beams according to the at least two pre-coders and the SFN communication scheme.

[0012] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the uplink data channel includes a codebook-based uplink data channel, and the two or more SRS resource indicators, the two or more transmit pre-coding indicators, or a combination thereof indicate the at least two pre-coders associated with the SFN transmission of the one or more SRSs.

[0013] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the uplink data channel includes a non-codebook-based uplink data channel, and the two or more SRS resource indicators indicate the at least two pre-coders associated with the SFN transmission of a subset of the one or more SRSs.

[0014] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the control message includes an RRC message, and the methods, apparatuses, and non-transitory computer-readable media may further include operations, features, components, or instructions for applying the SFN communication scheme to the SRS resource set associated with each SRS of the one or more SRSs according to the RRC message.

[0015] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the control message includes an RRC message, and the methods, apparatuses, and non-transitory computer-readable media may further include operations, features, components, or instructions for applying an SFN communication scheme to SRS resources corresponding to at least one SRS that may be associated with an SRS resource set in one or more SRSs according to the RRC message.

[0016] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the control message includes a DCI message, and transmitting the one or more SRSs may include operations, features, components, or instructions for transmitting one or more aperiodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the DCI message.

[0017] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the control message includes a media access control-control element, and transmitting the one or more SRSs may include operations, features, components, or instructions for transmitting one or more semi-periodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the MAC-CE.

[0018] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the one or more SRSs may include operations, features, components, or instructions for transmitting one or more periodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the RRC message.

[0019] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the one or more SRSs may include operations, features, components, or instructions for transmitting the one or more SRSs according to the SFN communication scheme based on the one or more SRSs being associated with the at least two directional beams.

[0020] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for performing the following operations: receiving a DCI message indicating one or more power control parameters corresponding to the at least two directional beams; and applying the one or more power control parameters to the at least two directional beams based on the DCI message.

[0021] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the one or more power control parameters include a first power control parameter and a second power control parameter, and the methods, apparatuses, and non-transitory computer-readable media may include additional operations, features, components, or instructions for applying the first power control parameter to a first directional beam of the at least two directional beams and applying the second power control parameter to a second directional beam of the at least two directional beams.

[0022] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the one or more power control parameters include a single power control parameter, and the methods, apparatuses, and non-transitory computer-readable media may include additional operations, features, components, or instructions for applying the single power control parameter to a first directional beam of the at least two directional beams and to a second directional beam of the at least two directional beams, respectively.

[0023] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the one or more power control parameters include a single power control parameter, and the methods, apparatuses, and non-transitory computer-readable media may include additional operations, features, components, or instructions for applying a first portion of the single power control parameter to a first directional beam of the at least two directional beams and applying a second portion of the single power control parameter to a second directional beam of the at least two directional beams.

[0024] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DCI message includes a group common DCI message, a first DCI message format, a second DCI message format, or any combination thereof.

[0025] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the at least two directional beams may be associated with at least two unified transmission configuration indicator (TCI) states, at least two spatial relation information parameters, or any combination thereof.

[0026] A method for wireless communication at a network entity is described. The method may include: sending a control message indicating a configuration of an SFN communication scheme for one or more sounding reference signals (SRSs), wherein the SFN communication scheme is configured for a respective antenna port associated with the one or more SRSs, and the respective antenna ports are each associated with at least two directional beams; and receiving the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0027] Describes an apparatus for wireless communication at a network entity. The apparatus may include at least one processor and a memory coupled to the at least one processor, the memory storing instructions that can be executed by the at least one processor (e.g., directly, indirectly, without preprocessing, after preprocessing) to cause the network entity to: transmit a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein the SFN communication scheme is configured for corresponding antenna ports associated with the one or more SRSs, and each of the corresponding antenna ports is associated with at least two directional beams; and receive the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0028] Describes another apparatus for wireless communication at a network entity. The apparatus may include: means for transmitting a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein the SFN communication scheme is configured for corresponding antenna ports associated with the one or more SRSs, and each of the corresponding antenna ports is associated with at least two directional beams; and means for receiving the one or more SRSs via at least two directional beams according to the SFN communication scheme.

[0029] Describes a non-transitory computer-readable medium storing code for wireless communication at a network entity. The code may include instructions that can be executed by at least one processor to: transmit a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein the SFN communication scheme is configured for corresponding antenna ports associated with the one or more SRSs, and each of the corresponding antenna ports is associated with at least two directional beams; and receive the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0030] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: transmitting one or more SRS resource indicators, one or more transmit precoding indicators, or any combination thereof, including an indication of at least two precoders to be applied to the at least two directional beams; and receiving an uplink data channel via the at least two directional beams according to the at least two precoders and the SFN communication scheme.

[0031] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the one or more SRSs may include operations, features, means, or instructions for receiving each of the one or more SRSs that may be associated with an SRS resource set based on an RRC message, the SRS resource set being configured with an SFN communication scheme.

[0032] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the one or more SRSs may include operations, features, components, or instructions for receiving at least one SRS in the one or more SRSs that may be associated with an SRS resource set based on an RRC message, and a corresponding SRS resource associated with the at least one SRS in the one or more SRSs is configured with an SFN communication scheme.

[0033] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the one or more SRSs may include operations, features, components, or instructions for receiving one or more aperiodic SRSs via the at least two directional beams according to an SFN communication scheme indicated by a DCI message.

[0034] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the one or more SRSs may include operations, features, components, or instructions for receiving one or more semi-periodic SRSs via the at least two directional beams according to an SFN communication scheme indicated by a MAC-CE.

[0035] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the one or more SRSs may include operations, features, components, or instructions for receiving one or more periodic SRSs via the at least two directional beams according to an SFN communication scheme indicated by an RRC message.

[0036] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: sending a DCI message indicating one or more power control parameters corresponding to the at least two directional beams; and receiving signaling via the at least two directional beams based on the one or more power control parameters and the DCI message.

[0037] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the one or more power control parameters correspond to both a first directional beam and a second directional beam among the at least two directional beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 、 Figure 2 、 Figure 3A and Figure 3B illustrate examples of wireless communication systems supporting a single-frequency network (SFN) transmission scheme for sounding reference signals (SRSs) in accordance with one or more aspects of the present disclosure.

[0039] Figure 4Illustrates an example of a process flow supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure.

[0040] Figure 5 and Figure 6 Illustrates a block diagram of an apparatus supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure.

[0041] Figure 7 Illustrates a block diagram of a communication manager supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure.

[0042] Figure 8 Illustrates a diagram of a system including an apparatus supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure.

[0043] Figure 9 and Figure 10 Illustrates a block diagram of an apparatus supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure.

[0044] Figure 11 Illustrates a block diagram of a communication manager supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure.

[0045] Figure 12 Illustrates a diagram of a system including an apparatus supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure.

[0046] Figures 13 to 16 Illustrates a flowchart showing a method supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure. Detailed Description

[0047] Some wireless communication systems may support a single frequency network (SFN) communication scheme to increase system throughput and coverage. Some such SFN communication schemes may implement broadcast signaling, where several wireless devices may transmit the same signal simultaneously on the same frequency channel, and several other wireless devices may receive the superposition of the transmitted signals. For example, SFN operation is implemented in a downlink system to increase the signal strength and reliability for downlink channels and associated downlink communications (e.g., via a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH)). SFN operation may also be applied to an uplink channel to increase the uplink throughput and reliability of associated uplink communications (e.g., via a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH)).

[0048] To further support uplink transmission using the SFN communication scheme, a user equipment (UE) can be configured to use the SFN communication scheme to transmit uplink sounding reference signals (SRS) so that the network can estimate uplink channel quality and other functions. For example, the UE can be configured to use the SFN communication scheme to transmit one or more SRSs, where each SRS port of the UE (e.g., an antenna port configured to transmit SRS) can be associated with two directional beams (e.g., two unified transmission configuration indicator (TCI) states or two spatial relation information parameters). Subsequently, the UE can use the two directional beams to transmit the SRS from the SRS port on a single frequency.

[0049] In some examples, the UE can receive an SFN indication for the SRS via radio resource control (RRC) signaling for transmitting periodic SRS, downlink control information (DCI) for transmitting aperiodic SRS, medium access control-control element (MAC-CE) signaling for semi-periodic SRS, or other control signaling based on various conditions. For example, the SFN indication for the SRS can be RRC configured for each SRS resource set (e.g., where each SRS in the SRS resource set is enabled using SFN transmission) or RRC configured for each SRS resource individually (e.g., where at least one SRS in the SRS resource set is enabled using SFN transmission). In some other examples, the UE can determine the SFN indication for the SRS based on the number of beams configured for the SRS (e.g., if two beams are configured for the SRS, the UE can implicitly determine SFN transmission for the SRS).

[0050] In some other embodiments, the UE can receive signaling from the network (e.g., via one or more SRS resource indicators or transmit precoding indicators) that includes an indication of one or more precoders to be applied to the multiple beams used to transmit the SRS. Additionally, the UE can be configured with different power control commands for SFN transmission of the SRS. For example, the UE can receive a power control command via DCI to be applied to the SFN transmission of the SRS, thereby reducing excessive power consumption.

[0051] Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are further illustrated by process flows, apparatus diagrams, system diagrams, and flowcharts related to the SFN transmission scheme for SRS, and are described with reference to these process flows, apparatus diagrams, system diagrams, and flowcharts.

[0052] Figure 1An example of a wireless communication system 100 that supports an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 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, a New Radio (NR) network, or a network operating according to other systems and radio technologies including future systems and radio technologies not explicitly mentioned herein.

[0053] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other names. In some examples, the network entities 105 and the UEs 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) within which the UEs 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area within which the network entity 105 and the UEs 115 may support signal communication according to one or more radio access technologies (RATs).

[0054] 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 devices in different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated. The UEs 115 described herein may be capable of supporting communication with various types of devices (such as other UEs 115 or network entities 105 as Figure 1 shown).

[0055] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, a device, an equipment, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node may be a UE 115. As another example, the node may be a network entity 105. As yet another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different from these examples. Similarly, references to UE 115, network entity 105, device, equipment, computing system, etc. may include the disclosure of UE 115, network entity 105, device, equipment, computing system, etc. as nodes. For example, the disclosure that UE 115 is configured to receive information from network entity 105 also discloses that a first node is configured to receive information from a second node.

[0056] In some examples, network entity 105 may communicate with core network 130, or with each other, or both. For example, network entity 105 may communicate with core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, network entity 105 may communicate with each other directly (e.g., directly between network entities 105) or indirectly (e.g., via core network 130) via backhaul communication link 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, network entity 105 may communicate with each other via midhaul communication link 162 (e.g., according to midhaul interface protocol) or fronthaul communication link 168 (e.g., according to fronthaul interface protocol) or any combination thereof. Backhaul communication link 120, midhaul communication link 162, or fronthaul communication link 168 may be or include one or more wired links (e.g., electrical link, optical fiber link), one or more wireless links (e.g., radio link, wireless optical link), etc. or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155.

[0057] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., transceiver base station, radio base station, NR base station, access point, radio transceiver, Node B, evolved Node B (eNB), next-generation Node B or gigabit Node B (any of which may be referred to as gNB), 5G NB, next-generation eNB (ng-eNB), home Node B, home evolved Node B, or other suitable terms). In some examples, the network entity 105 (e.g., base station 140) may be implemented in an integrated (e.g., monolithic, stand-alone) base station architecture that may be configured to utilize a protocol stack physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as base station 140).

[0058] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., disaggregated base station architecture, disaggregated RAN architecture) that may be configured to utilize a protocol stack physically or logically distributed between two or more network entities 105 (such as an integrated access backhaul (IAB) network, open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or virtualized RAN (vRAN) (e.g., cloud RAN (C-RAN))). For example, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., near-real-time RIC (near-RT RIC), non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, intelligent radio head, remote radio head (RRH), remote radio unit (RRU), or transmit receive point (TRP). One or more components of the network entity 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the disaggregated RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0059] The functional split between the CU 160, DU 165, and RU 170 is flexible and can support different functions, depending on which functions are performed at the CU 160, DU 165, or RU 170 (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof). For example, a functional split of the protocol stack can be employed between the CU 160 and DU 165 such that the CU 160 can support one or more layers of the protocol stack and the DU 165 can support one or more different layers of the protocol stack. In some examples, the CU 160 can host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functions and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 can be connected to one or more DU 165s or RU 170s, and one or more DU 165s or RU 170s can host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, media access control (MAC) layer) functions and signaling, and can each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack can be employed between the DU 165 and RU 170 such that the DU 165 can support one or more layers of the protocol stack and the RU 170 can support one or more different layers of the protocol stack. The DU 165 can support one or more different cells (e.g., via one or more RU 170s). In some cases, the functional split between the CU 160 and DU 165 or between the DU 165 and RU 170 can be within a protocol layer (e.g., some functions of a protocol layer can be performed by one of the CU 160, DU 165, or RU 170, while other functions of that protocol layer are performed by a different one of the CU 160, DU 165, or RU 170). The CU 160 can be further functionally split into a CU control plane (CU-CP) and a CU user plane (CU-UP) function. The CU 160 can be connected to one or more DU 165s via an intermediate transport communication link 162 (e.g., F1, F1-c, F1-u), and the DU 165 can be connected to one or more RU 170s via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface). In some examples, the intermediate transport communication link 162 or the fronthaul communication link 168 can be implemented according to the interfaces (e.g., channels) between the layers of the protocol stack, which are supported by the respective network entities 105 communicating via these communication links.

[0060] In some wireless communication systems (e.g., wireless communication system 100), the infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB node 104) may be controlled, in part, by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DUs 165 or one or more RUs 170 may be controlled, in part, by one or more CUs 160 associated with a donor network entity 105 (e.g., donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via the supported access and backhaul links (e.g., backhaul communication link 120). An IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a DU 165 of a coupled IAB donor. The IAB-MT may include a separate antenna set for relaying communications with a UE 115 or may share the same antenna of the IAB node 104 (e.g., of an RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB nodes 104, UEs 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the split RAN architecture (e.g., one or more IAB nodes 104 or components of an IAB node 104) may be configured to operate according to the techniques described herein.

[0061] In the case where the techniques described herein are applied in the context of a split RAN architecture, one or more components of the split RAN architecture may be configured to support an SFN transmission scheme for SRS as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., base station 140) may additionally or alternatively be performed by one or more components of the split RAN architecture (e.g., IAB node 104, DU 165, CU 160, RU 170, RIC 175, SMO180).

[0062] The UE 115 may include or may 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 may be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, multimedia / entertainment device (e.g., radio, MP3 player, or video device), camera, gaming device, navigation / location device (e.g., a GNSS (Global Navigation Satellite System) device based on, for example, GPS (Global Positioning System), Beidou system, GLONASS, or Galileo system, ground-based devices, etc.), tablet computer, laptop computer, netbook, smartbook, personal computer, smart device, wearable device (e.g., smartwatch, smart clothing, smart glasses, virtual reality goggles, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), drone, robot / robotic device, vehicle, vehicle device, meter (e.g., parking meter, electricity meter, gas meter, water meter), monitor, air pump, electrical appliance (e.g., kitchen appliance, washing machine, dryer), location tag, medical / health device, implant, sensor / actuator, display, or any other suitable device configured to communicate via wireless or wired media. In some examples, the UE 115 may include or may 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., that may be implemented in various objects such as electrical appliances or vehicles, drones, robots, meters, etc.

[0063] 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 a base station 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 that information to a central server or application, which can utilize the information or present the information to a person interacting with the program or application. Some UEs 115 can be designed to collect information or implement automated behavior of machines. Application examples of MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging. In one aspect, the techniques disclosed herein can be applicable to MTC or IoT UEs. MTC or IoT UEs can include MTC / enhanced MTC (eMTC, also known as CAT-M, Cat M1) UEs, NB-IoT (also known as CAT NB 1) UEs, and other types of UEs. eMTC and NB-IoT can refer to future technologies that can evolve from or be based on these technologies. For example, eMTC can include FeMTC (further eMTC), eFeMTC (further enhanced eMTC), mMTC (massive MTC), while NB-IoT can include eNB-IoT (enhanced NB-IoT) and FeNB-IoT (further enhanced NB-IoT).

[0064] The UEs 115 described herein may be capable of communicating with various types of devices such as other UEs 115 that can sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc., as Figure 1 shown.

[0065] The UE 115 and the network entity 105 may communicate wirelessly with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" may refer to a set of RF spectral resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion (e.g., bandwidth part (BWP)) of an RF spectral band operating 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 communication with the UE 115 using carrier aggregation or multi-carrier operation. According to a carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any part (e.g., entity, sub-entity) of the network entity 105. For example, the terms "transmit", "receive", or "communicate" when referring to the network entity 105 may refer to any part of the network entity 105 of the RAN (e.g., base station 140, CU 160, DU 165, RU 170) communicating with another device (e.g., directly or via one or more other network entities 105).

[0066] The signal waveform transmitted via 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 refer to the resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and the subcarrier spacing may be 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 decoding rate of the modulation scheme, or both), such that a relatively large number of resource elements (e.g., during the transmission duration) and a relatively high order of the modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectral resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial resources may increase the data rate or data integrity for communication with the UE 115.

[0067] A time interval for the network entity 105 or the UE 115 may be expressed as a multiple of a basic time unit, which may refer, for example, to the sampling period T s =1 / (Δfmax ·N f ) seconds, where Δf max can represent the supported subcarrier spacing, and N f can represent the supported discrete Fourier transform (DFT) size. The time intervals of the communication resources can be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0068] Each frame can include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot can have the same duration. In some examples, a frame can be divided (e.g., in the time domain) into subframes, and each subframe can be further divided into a certain number of time slots. Alternatively, each frame can include a variable number of time slots, and the number of time slots can depend on the subcarrier spacing. Each time slot can include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some wireless communication systems, a time slot can be further divided into a plurality of mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period can be associated with one or more (e.g., N f ones) sampling periods. The duration of the symbol period can depend on the subcarrier spacing or the operating frequency band.

[0069] A subframe, time slot, mini-slot, or symbol can be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and can be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0070] Physical channels can be reused according to various techniques for communication using a carrier. For example, one or more of time-division multiplexing (TDM) techniques, frequency-division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels for signaling via a downlink carrier. The control region of a physical control channel (e.g., a control resource set (CORESET)) can be defined by a set of symbol periods and can extend across the system bandwidth of a 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 of a control channel candidate can refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format with a given payload size. The search space set can include a common search space set configured to transmit control information to a plurality of UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115.

[0071] In some examples, the network entity 105 (e.g., the base station 140, the RU 170) can be movable and thus provide communication coverage for a moving coverage area 110. In some examples, different coverage areas 110 associated with different technologies can overlap, but different coverage areas 110 can be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies can be supported by different network entities 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of network entities 105 use the same or different radio access technologies to provide coverage for various coverage areas 110.

[0072] 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). The UE 115 can be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication can include private communication or group communication and can be supported by one or more services (such as push-to-talk, video, or data). Support for ultra-reliable, low-latency functions can include prioritization of services, and such services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency can be used interchangeably herein.

[0073] In some examples, UE 115 may be configured to support communicating directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 performing D2D communication in a group may be within the coverage area 110 of a network entity 105 (e.g., base station 140, RU 170), and the network entity may support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 in such a group may be outside the coverage area 110 of the network entity 105 or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, where each UE 115 transmits to each of the other UEs 115 in the group. In some examples, the network entity 105 may facilitate scheduling of resources for D2D communication. In some other examples, D2D communication may be performed between UEs 115 without involving the network entity 105.

[0074] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity for managing access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity for routing packets or interconnecting to an external network (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 may manage non-access stratum (NAS) functions, such as the mobility, authentication, and bearer management of UEs 115 served by a network entity 105 (e.g., base station 140) associated with the core network 130. User IP packets may be passed through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the IP services 150 of one or more network operators. The IP services 150 may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or packet-switched streaming services.

[0075] The wireless communication system 100 may operate using one or more frequency bands that can be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or the decimeter band because, in terms of length, the wavelength ranges from approximately one decimeter to one meter. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clutter, but these waves may be sufficient to penetrate structures so that a macro cell can serve a UE 115 located indoors. Compared with communication using smaller frequencies and longer wavelengths in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, communication using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers).

[0076] The wireless communication system 100 may utilize licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 may use an unlicensed band, such as the 5 GHz industrial, scientific, and medical (ISM) band, to employ licensed-assisted access (LAA), long term evolution unlicensed (LTE-U) radio access technology, or NR technology. When operating using an unlicensed RF spectrum band, devices such as the network entity 105 and the UE 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using an unlicensed band may be combined with component carriers operating using a licensed band based on a carrier aggregation configuration (e.g., LAA). Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer (P2P) transmissions, or device-to-device (D2D) transmissions, and so on.

[0077] The network entity 105 (e.g., the base station 140, the RU 170) or the UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of the network entity 105 or the UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations 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 the network entity 105 may be located at different geographical locations. The network entity 105 may include an antenna array having a set of antenna ports in multiple rows and columns that the network entity 105 can use to support beamforming for communication with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support RF beamforming for signals transmitted via the antenna ports.

[0078] The network entity 105 or the 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 can be referred to as spatial multiplexing. The multiple signals can be transmitted, for example, by a transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals can be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as a separate spatial stream and can carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers can 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.

[0079] Beamforming (which can 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., the network entity 105, the 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 the signals conveyed 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 conveyed via the antenna elements can 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 of these antenna elements can 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).

[0080] The network entity 105 or the UE 115 can use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., the base station 140, the RU 170) can use multiple antennas or antenna arrays (e.g., an antenna panel) to perform a beamforming operation for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) can be transmitted by the network entity 105 multiple times along different directions. For example, the network entity 105 can transmit signals according to different sets of beamforming weights associated with different transmission directions. The transmission along different beam directions can be used to identify (e.g., by the transmitting device, such as the network entity 105, or by the receiving device, such as the UE 115) the beam direction for later transmission or reception by the network entity 105.

[0081] Some signals, such as data signals associated with a particular receiving device, may be transmitted by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device such as receiving network entity 105 or receiving UE 115). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on signals transmitted along one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted by network entity 105 in different directions and may report to network entity 105 an indication of the signal that UE 115 receives with the highest signal quality or other acceptable signal quality.

[0082] In some examples, transmissions performed by a device (e.g., by network entity 105 or UE 115) may be carried out using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across the system bandwidth or one or more sub-bands. Network entity 105 may transmit reference signals (e.g., cell-specific reference signal (CRS), channel state information reference signal (CSI-RS)), which may or may not be precoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although these techniques are described with reference to signals transmitted by network entity 105 (e.g., base station 140, RU 170) in one or more directions, UE 115 may use similar techniques for transmitting signals multiple times in different directions (e.g., for identifying beam directions used by UE 115 for subsequent transmission or reception), or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

[0083] A receiving device (e.g., UE 115) may perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals from a receiving device (e.g., network entity 105), such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, the receiving device may perform receiving according to multiple receiving directions by: receiving via different antenna sub-arrays, processing the received signals according to different antenna sub-arrays, receiving according to different sets of receive beamforming weights (e.g., different directional listening weight sets) applied to the signals received at multiple antenna elements of the antenna array, or processing the received signals according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array, where any of these may refer to "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receiving configuration may be aligned along a beam direction determined based on listening according to different receiving configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0084] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communication at the bearer or PDCP layer may be IP-based. The RLC layer may perform packet segmentation and reassembly for conveyance via logical channels. The MAC layer may perform priority handling and multiplexing from logical channels into transport channels. The MAC layer may also implement error detection techniques, error correction techniques, or both to support retransmission to improve link efficiency. In the control plane, the RRC layer may provide the establishment, configuration, and maintenance of an RRC connection for radio bearers supporting user plane data between the UE 115 and the network entity 105 or the core network 130. The PHY layer may map transport channels to physical channels.

[0085] The wireless communication system 100 may support a unified transmission configuration indicator (TCI) architecture, where a wireless device may use a common beam to communicate via an uplink channel and a downlink channel, e.g., in the case where UE 115 supports multi-transmit receive point (mTRP) communication. In such cases, the network entity 105 may indicate to UE 115 multiple downlink TCI states and uplink TCI states to be used for mTRP communication. In some examples, UE 115 may support simultaneous multi-panel uplink transmission (e.g., in an SFN) to increase uplink throughput and reliability in a high-frequency (e.g., FR2) system that supports mTRP. In such examples, UE 115 may support up to two TRPs and up to two panels to communicate with multiple TRPs, network devices, customer premise equipment (CPE), fixed wireless access (FWA) devices, vehicles, industrial devices, or any combination thereof.

[0086] In some examples, UE 115 may support one or more precoding indicators for PUSCH, including a precoding codebook for multi-panel simultaneous transmission. In such cases, UE 115 may support four layers and two codewords across all panels (e.g., for single-DCI and multi-DCI based mTRP operations). Additionally, UE 115 may use a unified TCI framework (e.g., for multi-TRP operations based on single-DCI and multi-DCI) to support uplink beam indication for PUCCH and PUSCH. In some examples of multi-DCI based mTRP operations, UE 115 may transmit PUSCH and PUSCH or PUCCH and PUCCH across two panels in the same component carrier. In some other examples, UE 115 may support one or more timing advances for uplink multi-DCI mTRP operations, power control techniques for UL single-DCI and unified TCI for mTRP operations.

[0087] UE 115 may support a unified TCI framework in which uplink channels and downlink channels may be controlled by a common framework (e.g., as a supplement to or an alternative to defining TCI states or spatial relationships for each channel). For unified TCI, UE 115 may identify a common beam and apply the common beam to uplink channels and downlink channels. Additionally or alternatively, a common beam for the uplink may be applied to uplink channels, and a common beam for the downlink may be applied to downlink channels. In some examples, UE 115 may support one common beam for both the downlink and the uplink or a common beam for the downlink and a common beam for the uplink (e.g., two common beams in total). In such a unified TCI framework, UE 115 may apply the same TCI state (e.g., joint TCI state, joint TCI state pool, joint common TCI state pool) to uplink communication channels and / or downlink communication channels.

[0088] In some examples of the unified TCI framework, UE 115 may support a joint TCI state that indicates a common beam for at least one downlink channel, downlink reference signal, or both in addition to at least one uplink channel, uplink reference signal, or both. A first type of unified TCI framework may include at least UE-specific PDCCH, PDSCH, PUCCH, and PUSCH. In some other examples of the unified TCI framework, UE 115 may support a separate downlink TCI state to indicate a common beam for more than one downlink channel, downlink reference signal, or both, including at least UE-specific PDCCH and PDSCH. In some other examples of the unified TCI framework, UE 115 may support a separate uplink TCI state to indicate a common beam for more than one uplink channel, uplink reference signal, or both, including at least one UE-specific PUCCH and PUSCH.

[0089] In some examples, UE 115 may apply a unified TCI architecture to reduce signaling overhead and latency in multi-beam operations and for mTRP operations. For example, UE 115 may indicate common beam or common quasi-co-location (QCL) parameters for multiple channels and signals used to communicate with a first TRP and a second TRP. In such cases, even if a beam is blocked or the signaling quality for communication with the first TRP degrades, the common beam may still be used for communication with the second TRP, and UE 115 may maintain communication with the second TRP while switching to a different beam to communicate with the first TRP.

[0090] In some examples, for SFN communication, UE 115 may use the same time resources and frequency resources and different beams to increase system throughput and coverage. For example, some such SFN communication may be implemented in a downlink system to increase the signal strength and reliability for the downlink channel and associated downlink communication. SFN communication may also be applied to the uplink channel to increase uplink throughput and the reliability of associated uplink communication. To further support uplink transmissions using the SFN communication scheme, UE 115 may be configured to transmit an uplink SRS using the SFN communication scheme so that network entity 105 can estimate the uplink channel quality. For example, UE 115 may be configured to transmit an SRS using the SFN communication scheme, where each SRS port of UE 115 may be associated with two directional beams. Subsequently, UE 115 may use the two directional beams to transmit the SRS from the SRS port on a single frequency.

[0091] In some examples, UE 115 may receive an SFN indication for the SRS via RRC signaling for transmitting periodic SRS, DCI for transmitting aperiodic SRS, MAC-CE signaling for semi-periodic SRS, or other control signaling. For example, the SFN indication for the SRS may be RRC configured for each SRS resource set (e.g., where each SRS in the SRS resource set is enabled with SFN transmission) or RRC configured for each SRS resource individually (e.g., where at least one SRS in the SRS resource set is enabled with SFN transmission). In some other specific implementations, UE 115 may receive signaling from the network (e.g., via one or more SRS resource indicators or transmission precoding indicators) that includes an indication of one or more precoders to be applied to the multiple beams used for transmitting the SRS. Additionally or alternatively, UE 115 may be configured with different power control commands for SFN transmission of the SRS to reduce power consumption and improve signaling efficiency.

[0092] Figure 2 An example of a wireless communication system 200 that supports an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure is illustrated. For example, wireless communication system 200 may support communication between network entity 105-a and UE 115-a, where each of the network entity and the UE may be an example of network entity 105 and UE 115 as Figure 1 described. Additionally, wireless communication system 200 may support mTRP communication between UE 115-a and one or more TRPs, such as TRP 205-a and TRP 205-b.

[0093] In some specific implementations, the wireless communication system 200 may be an example of a broadcast network that supports SFN communication. For example, transmitting wireless devices (such as UE 115-a, TRP 205-a, TRP 205-b, and network entity 105-a) may simultaneously transmit the same signal on the same frequency channel, and receiving wireless devices may receive a set of superimposed signals on the same frequency. In some cases, SFN operation is used for downlink communication, for example, to increase the signal strength and reliability of downlink data channel communication and downlink data channel communication (such as PDCCH communication and PDSCH communication) conveyed between network entity 105-a and UE 115-a. In some other examples, the wireless communication system 200 may support SFN operation for uplink communication to increase the uplink throughput and reliability of uplink data channel communication and uplink control channel communication (such as PUSCH communication and PUCCH communication) conveyed between UE 115-a and network entity 105-a, TRP 205-a, TRP 205-b, or a combination thereof.

[0094] To support SFN communication for the uplink channel, UE 115-a may transmit an uplink SRS to provide information about one or more effects of multipath fading, scattering, Doppler effect (Doppler), or power loss of the transmitted signal. The SRS may be an uplink physical signal used by UE 115-a for uplink channel sounding, including channel quality estimation and synchronization, and this uplink physical signal may increase the accuracy of uplink timing and synchronization for SFN communication. For example, UE 115-a may receive an SFN indication 210 configured using SFN for the uplink SRS to configure UE 115-a. In some examples, the SFN indication may specify that each SRS port 215 of UE 115-a can be transmitted by two beams (such as beam 220-a and beam 220-b) corresponding to two unified TTIs or two spatial relationship information configurations. UE 115-a may then transmit the uplink SRS (such as transmitting to TRP 205-a, TRP 205-b, or network entity 105-a) via two beams in the SFN based on the configuration for the uplink SRS in the SFN.

[0095] In some examples, the SFN indication 210 may be an RRC configured for each SRS resource set 225 (such as via an RRC message). For example, the RRC configuration may specify that each SRS resource in the SRS resource set 225 supports SFN transmission. In some other examples, the SFN indication 210 may be an RRC configured for each SRS resource. For example, the RRC configuration may specify one or more SRS resources in the SRS resource set 225 that support SFN transmission.

[0096] In some other examples, the SFN indication 210 may be indicated via SRS trigger signaling (e.g., via DCI, MAC-CE, or RRC message). For example, the SFN indication 210 is conveyed via DCI to indicate the SFN transmission of the aperiodic SRS, the SFN indication 210 may be conveyed via MAC-CE to indicate the SFN transmission of the semi-periodic SRS, and the SFN indication 210 may be conveyed via RRC message to indicate the SFN transmission of the periodic SRS.

[0097] In some other examples, the SFN indication 210 may indicate the number of beams (e.g., beam 220-a and beam 220-b) that the UE 115-a can use to transmit the uplink SRS. In such examples, the UE 115-a may implicitly determine to transmit the uplink SRS via the SFN communication scheme. For example, if the SFN indication 210 indicates two beams for the SRS (e.g., two TCIs or two spatial relation information), the UE 115-a may use the SFN transmission scheme to transmit the SRS. Additionally or alternatively, if the UE 115-a receives an indication of one beam configured for transmitting the SRS, the UE 115-a may use the multi-frequency network communication scheme or some other non-SFN communication scheme to transmit the uplink SRS.

[0098] In some other examples, the SFN indication 210 may include explicit signaling from the network entity 105-a (e.g., via one or more SRS resource indicators (SRIs) or transmit precoding matrix indicators (TPMIs)), the explicit signaling including an indication of one or more precoders to be applied to the beams 220-a and 220-b used for transmitting the SRS. Additionally or alternatively, the SFN indication 210 may include an indication of one or more different power control commands for the SFN transmission of the SRS. For example, the UE 115-a may receive an indication of one or more received power control commands to be applied to the SFN transmission of the SRS to reduce excessive power consumption.

[0099] Figure 3A and Figure 3B illustrates examples of a wireless communication system 301 and a wireless communication system 302 supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure. For example, the wireless communication system 301 may support communication between the network entity 105-b and the UE 115-b, and the wireless communication system 302 may support communication between the network entity 105-c and the UE 115-c, each of the network entity and the UE may be a reference Figure 1 and Figure 2Examples of the described network entity 105 and UE 115. Additionally, wireless communication system 301 and wireless communication system 302 may support mTRP communication between UE 115-b, UE 115-c and one or more TRPs, such as TRP 305-a, TRP 305-b, TRP 305-c, and TRP 305-d, respectively.

[0100] Figure 3A An SFN communication scheme for PUSCH transmission can be exemplified, where UE 115-b can be configured via an SFN indication 310 to use SFN transmission for an uplink SRS resource set. For example, the SRS resource set usage can be configured to be codebook-based or non-codebook-based for PUSCH transmission, and the SFN indication 310 may include one or more pre-coders (such as pre-coder 1 and pre-coder 2) that UE 115-b can use to transmit the PUSCH.

[0101] For example, the SFN indication 310 may include a single SRI, a single TPMI, or both, which may include an indication of two pre-coders applicable to beam 315-a and beam 315-b for UE 115-a. UE 115-a can apply the two pre-coders to the two beams to transmit SRS via the two beams of each SRS port in the SFN. For codebook-based PUSCH, the SRI, TPMI, or both may indicate the two pre-coders used in the SFN transmission for the indicated SRS resource (e.g., based on one or more defined pre-coder values). For example, UE 115-b can determine two beams for SFN PUSCH transmission based on the two beams used for the SFN transmission of the indicated SRS resource. Additionally or alternatively, for non-codebook-based PUSCH, the SRI, TPMI, or both indicate the two pre-coders used in the SFN transmission for the indicated subset of SRS resources. For example, UE 115-b can calculate the values of the two pre-coders based on downlink reference signaling.

[0102] In some other specific implementations, the SFN indication 310 may indicate two SRIs, two TPMIs, or a combination thereof, and the two SRIs, two TPMIs, or the combination thereof indicate two pre-coders for the PUSCH. For codebook-based PUSCH, the two SRIs, TPMIs, or the combination thereof indicate the two pre-coders used in the SFN transmission for two corresponding indicated SRS resources. For non-codebook-based PUSCH, the two SRIs, two TPMIs, or the combination thereof indicate the two pre-coders used in the SFN transmission for two corresponding subsets of the indicated SRS resources. The first indicated pre-coder may be associated with the first beam of the indicated SRS, and the second indicated pre-coder may be associated with the second beam of the indicated SRS.

[0103] Figure 3B A SFN communication scheme for uplink SRS may be illustrated, where UE 115-c may receive one or more power control commands via the SFN indication 320. For example, the SFN indication 320 may be a DCI (such as group common DCI, DCI0_1, or DCI0_2), and the DCI may indicate two separate power control commands or a shared power control command to be applied to beam 315-c and beam 315-d for transmitting SRS. In such examples, the two separate power control commands may be mapped and applied to beam 315-c and beam 315-d. In some other examples, the SFN indication 320 may be a DCI (such as group common DCI, DCI format 01, or DCI format 0_2), and the DCI may indicate a single power control to be applied to both beam 315-c and beam 315-d for transmitting SRS. For example, a single power control command may be mapped and applied to both beam 315-c and beam 315-d. Additionally or alternatively, a single power control command may be split and applied to both beam 315-c and beam 315-d, where the total transmission power is shared between the two beams.

[0104] Figure 4An example of a process flow 400 that supports an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure is illustrated. For example, the process flow 400 may support SFN communication between a UE 115-d and a network entity 105-d, which may be examples of the corresponding devices described herein. In the following description of the process flow 400, the operations between the UE 115-d and the network entity 105-d may be sent in an order different from the order shown, or other operations may be added to or removed from the process flow 400. For example, some operations may also be omitted from the process flow 400, may be performed in a different order or at different times, or other operations may be added to the process flow 400. Although the UE 115-d and the network entity 105-d are shown as performing the operations of the process flow 400, some aspects of some operations may also be performed by one or more other wireless or network devices.

[0105] At 405, the network entity 105-d may send and the UE 115-d may receive a control message indicating a configuration of an SFN communication scheme for one or more SRSs. In some examples, corresponding antenna ports of the UE 115-d may be allocated for transmitting one or more SRSs and may each be associated with at least two directional beams at 410. The at least two directional beams may be associated with at least two unified TCI states, at least two spatial relation information parameters, or any combination thereof.

[0106] In some examples, the control message may be a DCI including one or more SRIs, one or more TPMIs, or a combination thereof, indicating at least two precoders to be applied to the at least two directional beams. In some examples, the one or more SRIs, the one or more TPMIs, or the combination thereof indicate at least two precoders associated with SFN transmission of one or more SRSs or a subset of one or more SRSs.

[0107] In some examples, the control message may be an RRC message, and the UE 115-d may apply the SFN communication scheme to an SRS resource set associated with each SRS among the one or more SRSs. In some other examples, the UE 115-d may apply the SFN communication scheme to an SRS resource corresponding to at least one SRS among the one or more SRSs associated with the SRS resource set. In some other examples, the UE 115-d may transmit one or more periodic SRSs via the at least two directional beams according to the SFN communication scheme.

[0108] In some other examples, the control message can be a DCI message, and the UE 115-d can send one or more aperiodic SRSs via at least two directional beams according to the SFN communication scheme indicated by the DCI. In other examples, the control message can be a MAC-CE, and the UE 115-d can send one or more semi-periodic SRSs via at least two directional beams according to the SFN communication scheme indicated by the MAC-DCI.

[0109] At 415, the UE 115-d can send one or more SRSs on the uplink data channel via at least two directional beams according to the SFN communication scheme. In some examples, the UE 115-d can send one or more SRSs via at least two directional beams after applying at least two precoders to the at least two directional beams. In some examples, the uplink data channel includes a codebook-based uplink data channel, and the at least two precoders are based on at least two directional beams associated with the SFN communication scheme used to send the one or more SRSs. In some other examples, the uplink data channel is a non-codebook-based uplink data channel, and the at least two precoders are determined based on at least two directional beams associated with the SFN communication scheme for a subset of the one or more SRSs to be sent.

[0110] In some examples, the UE 115-d can use one or more power control parameters to send one or more SRSs. For example, the UE 15-d can receive a DCI message (such as a group common DCI message, a first DCI message format, a second DCI message format, or any combination thereof) indicating one or more power control parameters corresponding to at least two directional beams, and the UE 115-d can apply the one or more power control parameters to the at least two directional beams based on the DCI message. In some embodiments, the DCI message can indicate a first power control parameter and a second power control parameter, and the UE115-d can apply the first power control parameter to the first directional beam among the at least two directional beams and apply the second power control parameter to the second directional beam among the at least two directional beams. In some other embodiments, the DCI message can indicate a single power control parameter, and the UE 115-d can apply a first part of the single power control parameter to the first directional beam among the at least two directional beams and apply a second part of the single power control parameter to the second directional beam among the at least two directional beams (e.g., the UE 115-d can split the total power between the at least two directional beams).

[0111] Figure 5FIG. 500 is a block diagram illustrating device 505 supporting an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure. Device 505 may be an example of aspects of UE 115 as described herein. Device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. Device 505 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0112] The receiver 510 may provide components for receiving information associated with various information channels (e.g., control channels, data channels, information channels associated with an SFN transmission scheme for SRS), such as packets, user data, control information, or any combination thereof. The information may be passed to other components of device 505. The receiver 510 may utilize a single antenna or an array of multiple antennas.

[0113] The transmitter 515 may provide components for transmitting signals generated by other components of device 505. For example, the transmitter 515 may transmit information associated with various information channels (e.g., control channels, data channels, information channels associated with an SFN transmission scheme for SRS), such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or an array of multiple antennas.

[0114] The communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof or their various components may be examples of components for performing various aspects of an SFN transmission scheme for SRS as described herein. For example, the communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof or components may support methods for performing one or more of the functions described herein.

[0115] In some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof or components may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured to or otherwise supporting components for performing the functions described in the present disclosure. In some examples, at least one processor and a memory coupled to at least one processor may be configured to perform one or more of the functions described herein (e.g., by the at least one processor executing instructions stored in the memory).

[0116] Additionally or alternatively, in some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in code executed by a processor (e.g., implemented as communication management software). If implemented in code executed by a processor, the functions of the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, a GPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., components configured to or otherwise supporting the functions described in this disclosure).

[0117] In some examples, the communication manager 520 may be configured to use or otherwise cooperate with the receiver 510, the transmitter 515, or both to perform various operations (e.g., receive, obtain, monitor, output, transmit). For example, the communication manager 520 may receive information from the receiver 510, convey information to the transmitter 515, or integrate in combination with the receiver 510, the transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0118] According to examples disclosed herein, the communication manager 520 may support wireless communication at a UE. For example, the communication manager 520 may be configured to or otherwise support components for receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting one or more SRSs are each associated with at least two directional beams. The communication manager 520 may be configured to or otherwise support components for transmitting one or more SRSs via at least two directional beams according to the SFN communication scheme.

[0119] By including or configuring a communication manager 520 according to examples described herein, a device 505 (e.g., at least one processor controlling the receiver 510, the transmitter 515, the communication manager 520, or combinations thereof or otherwise coupled to the receiver, the transmitter, the communication manager, or combinations thereof) may support techniques for more efficiently utilizing communication resources, increasing coverage and reliability, improving power savings, and increasing throughput.

[0120] Figure 6 Block diagram 600 illustrates a device 605 supporting an SFN transmission scheme for SRSs according to one or more aspects of the present disclosure. The device 605 may be an example of aspects of the device 505 or UE 115 described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0121] The receiver 610 may provide components for receiving information associated with various information channels (e.g., control channels, data channels, information channels associated with the SFN transmission scheme for SRS), such as packets, user data, control information, or any combination thereof. The information may be passed to other components of the device 605. The receiver 610 may utilize a single antenna or an array of multiple antennas.

[0122] The transmitter 615 may provide components for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information associated with various information channels (e.g., control channels, data channels, information channels associated with the SFN transmission scheme for SRS), such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or an array of multiple antennas.

[0123] The device 605 or its various components may be examples of components for performing various aspects of the SFN transmission scheme for SRS as described herein. For example, the communication manager 620 may include an SRS configuration component 625, an SFN communication component 630, or any combination thereof. The communication manager 620 may be an example of aspects of the communication manager 520 as described herein. In some examples, the communication manager 620 or its various components may be configured to use or otherwise cooperate with the receiver 610, the transmitter 615, or both to perform various operations (e.g., receive, obtain, monitor, output, transmit). For example, the communication manager 620 may receive information from the receiver 610, convey information to the transmitter 615, or integrate with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

[0124] According to examples disclosed herein, the communication manager 620 may support wireless communication at a UE. The SRS configuration component 625 may be configured to or otherwise support components for receiving control messages indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting one or more SRSs are each associated with at least two directional beams. The SFN communication component 630 may be configured to or otherwise support components for transmitting one or more SRSs via at least two directional beams according to the SFN communication scheme.

[0125] Figure 7Block diagram 700 illustrates a communication manager 720 that supports an SFN transmission scheme for SRS according to one or more aspects of the present disclosure. The communication manager 720 may be an example of the communication manager 520, the communication manager 620, or aspects of both as described herein. The communication manager 720 or its various components may be examples of components for performing various aspects of the SFN transmission scheme for SRS as described herein. For example, the communication manager 720 may include an SRS configuration component 725, an SFN communication component 730, a pre-coding component 735, a power control management component 740, or any combination thereof. Each of these components may communicate directly or indirectly with one another (e.g., via one or more buses).

[0126] According to an example as disclosed herein, the communication manager 720 may support wireless communication at a UE. The SRS configuration component 725 may be configured to or otherwise support a component for receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting the one or more SRSs are each associated with at least two directional beams. The SFN communication component 730 may be configured to or otherwise support a component for transmitting the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0127] In some examples, the pre-coding component 735 may be configured to or otherwise support a component for receiving a DCI message including an SRS resource indicator, a transmission pre-coding indicator, or both, the SRS resource indicator, the transmission pre-coding indicator, or both including an indication of at least two pre-coders to be applied to the at least two directional beams. In some examples, the SFN communication component 730 may be configured to or otherwise support a component for transmitting an uplink data channel via the at least two directional beams according to the at least two pre-coders and the SFN communication scheme.

[0128] In some examples, the uplink data channel includes a codebook-based uplink data channel, and the at least two pre-coders are based on the at least two directional beams associated with the SFN communication scheme for transmitting the one or more SRSs.

[0129] In some examples, the uplink data channel includes a non-codebook-based uplink data channel. In some examples, the at least two pre-coders are determined based on the at least two directional beams associated with the SFN communication scheme for transmitting a subset of the one or more SRSs.

[0130] In some examples, the pre-coding component 735 may be configured to or otherwise support components for receiving two or more SRS resource indicators, two or more transmit pre-coding indicators, or a combination thereof that include an indication of at least two pre-coders to be applied to at least two directional beams. In some examples, the SFN communication component 730 may be configured to or otherwise support components for transmitting an uplink data channel via at least two directional beams according to at least two pre-coders and an SFN communication scheme.

[0131] In some examples, the uplink data channel includes a codebook-based uplink data channel, and the two or more SRS resource indicators, the two or more transmit pre-coding indicators, or a combination thereof indicate the at least two pre-coders associated with the SFN transmission of one or more SRSs.

[0132] In some examples, the uplink data channel includes a non-codebook-based uplink data channel, and the two or more SRS resource indicators indicate the at least two pre-coders associated with the SFN transmission of a subset of the one or more SRSs.

[0133] In some examples, the control message includes an RRC message, and the SFN communication component 730 may be configured to or otherwise support components for applying the SFN communication scheme to an SRS resource set associated with each of one or more SRSs according to the RRC message.

[0134] In some examples, the control message includes an RRC message, and the SFN communication component 730 may be configured to or otherwise support components for applying the SFN communication scheme to an SRS resource corresponding to at least one of one or more SRSs associated with an SRS resource set according to the RRC message.

[0135] In some examples, to support the transmission of one or more SRSs, the SFN communication component 730 may be configured to or otherwise support components for transmitting one or more aperiodic SRSs via at least two directional beams according to the SFN communication scheme indicated by a DCI message.

[0136] In some examples, to support the transmission of one or more SRSs, the SFN communication component 730 may be configured to or otherwise support components for transmitting one or more semi-periodic SRSs via at least two directional beams according to the SFN communication scheme indicated by a DCI.

[0137] In some examples, to support the transmission of one or more SRSs, the SFN communication component 730 may be configured to or otherwise support components for transmitting one or more periodic SRSs via at least two directional beams according to an SFN communication scheme indicated by an RRC message.

[0138] In some examples, to support the transmission of one or more SRSs, the SFN communication component 730 may be configured to or otherwise support components for transmitting one or more SRSs according to an SFN communication scheme based on the association of one or more SRSs with at least two directional beams.

[0139] In some examples, the power control management component 740 may be configured to or otherwise support components for receiving a DCI message indicating one or more power control parameters corresponding to at least two directional beams. In some examples, the power control management component 740 may be configured to or otherwise support components for applying one or more power control parameters to at least two directional beams based on the DCI message.

[0140] In some examples, the one or more power control parameters include a first power control parameter and a second power control parameter, and the power control management component 740 may be configured to or otherwise support components for applying the first power control parameter to a first directional beam among at least two directional beams and applying the second power control parameter to a second directional beam among at least two directional beams.

[0141] In some examples, the one or more power control parameters include a single power control parameter, and the power control management component 740 may be configured to or otherwise support components for applying the single power control parameter to a first directional beam among at least two directional beams and to a second directional beam among at least two directional beams, respectively.

[0142] In some examples, the one or more power control parameters include a single power control parameter, and the power control management component 740 may be configured to or otherwise support components for applying a first portion of the single power control parameter to a first directional beam among at least two directional beams and applying a second portion of the single power control parameter to a second directional beam among at least two directional beams.

[0143] In some examples, the DCI message includes a group common DCI message, a first DCI message format, a second DCI message format, or any combination thereof. In some instances, the at least two directional beams are associated with at least two unified TCI states, at least two spatial relation information parameters, or any combination thereof.

[0144] Figure 8 FIG. 800 illustrates a system 800 including a device 805 that supports an SFN transmission scheme for SRS, in accordance with one or more aspects of the present disclosure. The device 805 may be an example of the device 505, the device 605, or the UE 115 described herein, or include components thereof. The device 805 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 805 may include components for two-way voice and data communication, including components for transmitting and receiving communication, such as a communication manager 820, an input / output (I / O) controller 810, a transceiver 815, an antenna 825, a memory 830, code 835, and a processor 840. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, or electrically) via one or more buses (e.g., bus 845).

[0145] The I / O controller 810 may manage input and output signals of the device 805. The I / O controller 810 may also manage peripheral devices not integrated into the device 805. In some cases, the I / O controller 810 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 810 may utilize an operating system, such as or another known operating system. Additionally or alternatively, the I / O controller 810 may represent, or interact with, a modem, a keyboard, a mouse, a touch screen, or similar device. In some cases, the I / O controller 810 may be implemented as part of a processor (such as the processor 840). In some cases, a user may interact with the device 805 via the I / O controller 810 or via hardware components controlled by the I / O controller 810.

[0146] In some cases, the device 805 may include a single antenna 825. However, in some other cases, the device 805 may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 815 may communicate bi-directionally via one or more antennas 825, a wired or wireless link, as described herein. For example, the transceiver 815 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 815 may also include a modem for: modulating a packet; providing the modulated packet to one or more antennas 825 for transmission; and demodulating a packet received from one or more antennas 825. The transceiver 815, or the transceiver 815 and one or more antennas 825, may be an example of the transmitter 515, the transmitter 615, the receiver 510, the receiver 610, or any combination thereof, or components thereof, as described herein.

[0147] The memory 830 may include a random access memory (RAM) and a read only memory (ROM). The memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed by the processor 840, cause the device 805 to perform the various functions described herein. The code 835 may be stored in a non-transitory computer-readable medium such as the system memory or another type of memory. In some cases, the code 835 may not be directly executable by the processor 840 but may (e.g., when compiled and executed) cause the computer to perform the functions described herein. In some cases, among other things, the memory 830 may also contain a basic input / output system (BIOS) that may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0148] The processor 840 may include intelligent hardware devices (e.g., a general-purpose processor, a DSP, a CPU, a GPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks supporting an SFN transmission scheme for SRS). For example, the device 805 or components of the device 805 may include the processor 840 and the memory 830 coupled to or coupled with the processor 840, and the processor 840 and the memory 830 are configured to perform the various functions described herein.

[0149] According to an example as disclosed herein, the communication manager 820 may support wireless communication at the UE. For example, the communication manager 820 may be configured to or otherwise support components for receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting one or more SRSs are each associated with at least two directional beams. The communication manager 820 may be configured to or otherwise support components for transmitting one or more SRSs via at least two directional beams according to the SFN communication scheme.

[0150] By including or configuring a communication manager 820 according to examples as described herein, the device 805 may support techniques for improving communication reliability, reducing latency, improving the user experience associated with processing reduction, more efficiently utilizing communication resources, improving coordination between devices, improving power savings, increasing uplink throughput and reliability, increasing coverage, and extending support for SFN communication for uplink communication.

[0151] In some examples, the communication manager 820 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in conjunction with the transceiver 815, one or more antennas 825, or any combination thereof. Although the communication manager 820 is illustrated as a separate component, in some examples, one or more of the functions described with reference to the communication manager 820 may be supported or performed by the processor 840, the memory 830, the code 835, or any combination thereof. For example, the code 835 may include instructions that can be executed by the processor 840 to cause the device 805 to perform various aspects of the SFN transmission scheme for SRS as described herein, or the processor 840 and the memory 830 may otherwise be configured to execute or support such operations.

[0152] Figure 9 Block diagram 900 illustrating a device 905 that supports an SFN transmission scheme for SRS according to one or more aspects of the present disclosure. The device 905 may be an example of aspects of the network entity 105 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. The device 905 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0153] The receiver 910 may provide components for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of the device 905. In some examples, the receiver 910 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 910 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0154] Transmitter 915 may provide a component for outputting (e.g., transmitting, providing, conveying, delivering) information generated by other components of device 905. For example, transmitter 915 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, transmitter 915 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, transmitter 915 may support outputting information by transmitting signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, transmitter 915 and receiver 910 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0155] Communication manager 920, receiver 910, transmitter 915, or various combinations or various components thereof may be examples of components for performing various aspects of the SFN transmission scheme for SRS as described herein. For example, communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may support methods for performing one or more of the functions described herein.

[0156] In some examples, communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, DSP, CPU, GPU, ASIC, FPGA, or other programmable logic device, microcontroller, discrete gate or transistor logic, discrete hardware component, or any combination thereof configured to or otherwise supporting components for performing the functions described in this disclosure. In some examples, at least one processor and a memory coupled to the at least one processor may be configured to perform one or more of the functions described herein (e.g., by the at least one processor executing instructions stored in the memory).

[0157] Additionally or alternatively, in some examples, communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be implemented in code executed by a processor (e.g., implemented as communication management software). If implemented in code executed by a processor, the functions of communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be performed by a general-purpose processor, DSP, CPU, GPU, ASIC, FPGA, microcontroller, or any combination of these or other programmable logic devices (e.g., configured to or otherwise supporting components for performing the functions described in this disclosure).

[0158] In some examples, the communication manager 920 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with the receiver 910, the transmitter 915, or both. For example, the communication manager 920 may receive information from the receiver 910, convey information to the transmitter 915, or integrate in combination with the receiver 910, the transmitter 915, or both to obtain information, output information, or perform various other operations as described herein.

[0159] According to examples disclosed herein, the communication manager 920 may support wireless communication at a network entity. For example, the communication manager 920 may be configured to or otherwise support a component for transmitting a control message indicating a configuration of an SFN communication scheme for one or more SRSs, where the SFN communication scheme is configured for a respective antenna port associated with one or more SRSs, and each of the respective antenna ports is associated with at least two directional beams. The communication manager 920 may be configured to or otherwise support a component for receiving one or more SRSs via at least two directional beams according to the SFN communication scheme.

[0160] By including or configuring the communication manager 920 according to examples described herein, a device 905 (e.g., at least one processor that controls or otherwise is coupled to the receiver 910, the transmitter 915, the communication manager 920, or a combination thereof) may support techniques for more efficiently utilizing communication resources, improving power savings, and increasing throughput and reliability.

[0161] Figure 10 Block diagram 1000 illustrates a device 1005 that supports an SFN transmission scheme for SRSs according to one or more aspects of the present disclosure. The device 1005 may be an example of aspects of the device 905 or the network entity 105 described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. The device 1005 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0162] The receiver 1010 may provide components for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of the device 1005. In some examples, the receiver 1010 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 1010 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0163] The transmitter 1015 may provide components for outputting (e.g., transmitting, providing, delivering, conveying) information generated by other components of the device 1005. For example, the transmitter 1015 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 1015 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, the transmitter 1015 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1015 and the receiver 1010 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0164] The device 1005 or its various components may be examples of components for performing various aspects of the SFN transmission scheme for SRS as described herein. For example, the communication manager 1020 may include an SRS configuration component 1025, an SFN communication component 1030, or any combination thereof. The communication manager 1020 may be an example of aspects of the communication manager 920 as described herein. In some examples, the communication manager 1020 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with the receiver 1010, the transmitter 1015, or both. For example, the communication manager 1020 may receive information from the receiver 1010, convey information to the transmitter 1015, or integrate in combination with the receiver 1010, the transmitter 1015, or both to obtain information, output information, or perform various other operations as described herein.

[0165] According to examples as disclosed herein, communication manager 1020 may support wireless communication at a network entity. The SRS configuration component 1025 may be configured to or otherwise support a component for sending a control message indicating a configuration of an SFN communication scheme for one or more SRSs, where the SFN communication scheme is configured for corresponding antenna ports associated with the one or more SRSs, and the corresponding antenna ports are each associated with at least two directional beams. The SFN communication component 1030 may be configured to or otherwise support a component for receiving the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0166] Figure 11 Block diagram 1100 illustrates a communication manager 1120 supporting an SFN transmission scheme for SRS according to one or more aspects of the present disclosure. The communication manager 1120 may be an example of aspects of the communication manager 920, the communication manager 1020, or both as described herein. The communication manager 1120 or its various components may be examples of components for performing various aspects of the SFN transmission scheme for SRS as described herein. For example, the communication manager 1120 may include an SRS configuration component 1125, an SFN communication component 1130, a pre-coding configuration component 1135, a power control configuration component 1140, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses), and such communication may include communication within a protocol layer of a protocol stack, communication associated with a logical channel of the protocol stack (e.g., between protocol layers of the protocol stack, within a device, component, or virtualized component associated with the network entity 105, between devices, components, or virtualized components associated with the network entity 105), or any combination thereof.

[0167] According to examples as disclosed herein, communication manager 1120 may support wireless communication at a network entity. The SRS configuration component 1125 may be configured to or otherwise support a component for sending a control message indicating a configuration of an SFN communication scheme for one or more SRSs, where the SFN communication scheme is configured for corresponding antenna ports associated with the one or more SRSs, and the corresponding antenna ports are each associated with at least two directional beams. The SFN communication component 1130 may be configured to or otherwise support a component for receiving the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0168] In some examples, the pre-coding configuration component 1135 may be configured to or otherwise support components for transmitting one or more SRS resource indicators, one or more transmission pre-coding indicators, or any combination thereof that include an indication of at least two pre-coders to be applied to at least two directional beams. In some examples, the SFN communication component 1130 may be configured to or otherwise support components for receiving an uplink data channel via at least two directional beams according to at least two pre-coders and an SFN communication scheme.

[0169] In some examples, to support receiving one or more SRSs, the SFN communication component 1130 may be configured to or otherwise support components for receiving each of one or more SRSs associated with an SRS resource set based on an RRC message, where the SRS resource set is configured with an SFN communication scheme.

[0170] In some examples, to support receiving one or more SRSs, the SFN communication component 1130 may be configured to or otherwise support components for receiving at least one of one or more SRSs associated with an SRS resource set based on an RRC message, where a corresponding SRS resource associated with at least one of the one or more SRSs is configured with an SFN communication scheme.

[0171] In some examples, to support receiving one or more SRSs, the SFN communication component 1130 may be configured to or otherwise support components for receiving one or more aperiodic SRSs via at least two directional beams according to an SFN communication scheme indicated by a DCI message.

[0172] In some examples, to support receiving one or more SRSs, the SFN communication component 1130 may be configured to or otherwise support components for receiving one or more semi-periodic SRSs via at least two directional beams according to an SFN communication scheme indicated by a DCI.

[0173] In some examples, to support receiving one or more SRSs, the SFN communication component 1130 may be configured to or otherwise support components for receiving one or more periodic SRSs via at least two directional beams according to an SFN communication scheme indicated by an RRC message.

[0174] In some examples, the power control configuration component 1140 may be configured to or otherwise support a component for transmitting a DCI message indicating one or more power control parameters corresponding to at least two directional beams. In some examples, the SFN communication component 1130 may be configured to or otherwise support a component for receiving signaling via at least two directional beams based on one or more power control parameters and the DCI message.

[0175] In some examples, the one or more power control parameters correspond to both a first directional beam of the at least two directional beams and a second directional beam of the at least two directional beams.

[0176] Figure 12 FIG. illustrates a system 1200 including a device 1205 supporting an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure. The device 1205 may be an example of the device 905, the device 1005, or the network entity 105 as described herein, or include components thereof. The device 1205 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, and the communication may include communication via one or more wired interfaces, via one or more wireless interfaces, or any combination thereof. The device 1205 may include components supporting output and obtaining of communication, such as a communication manager 1220, a transceiver 1210, an antenna 1215, a memory 1225, code 1230, and a processor 1235. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1240).

[0177] As described herein, transceiver 1210 may support two-way communication via a wired link, a wireless link, or both. In some examples, transceiver 1210 may include a wired transceiver and may communicate bi-directionally with another wired transceiver. Additionally or alternatively, in some examples, transceiver 1210 may include a wireless transceiver and may communicate bi-directionally with another wireless transceiver. In some examples, device 1205 may include one or more antennas 1215 that may be capable of transmitting or receiving wireless transmissions (e.g., concurrently). Transceiver 1210 may also include a modem that is configured to: modulate a signal, provide the modulated signal for transmission (e.g., via one or more antennas 1215, via a wired transmitter), receive a modulated signal (e.g., from one or more antennas 1215, from a wired receiver), and demodulate the signal. In some implementations, transceiver 1210 may include one or more interfaces, such as one or more interfaces coupled to one or more antennas 1215 configured to support various receiving or obtaining operations, or one or more interfaces coupled to one or more antennas 1215 configured to support various transmitting or output operations, or a combination thereof. In some implementations, transceiver 1210 may include one or more processors or memory components or be configured to couple with them, and these processors or memory components are capable of operating to: perform or support operations based on received or obtained information or signals; or generate information or other signals for transmission or other output, or any combination thereof. In some implementations, transceiver 1210 or transceiver 1210 and one or more antennas 1215 or transceiver 1210 and one or more antennas 1215 and one or more processors or memory components (e.g., processor 1235 or memory 1225 or both) may be included in a chip or chip assembly installed in device 1205. In some examples, the transceiver may operate to support communication via one or more communication links (e.g., communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0178] Memory 1225 may include RAM and ROM. Memory 1225 may store computer-readable, computer-executable code 1230 that includes instructions that, when executed by processor 1235, cause device 1205 to perform the various functions described herein. Code 1230 may be stored on a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1230 may not be directly executable by processor 1235 but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, among other things, memory 1225 may also contain BIOS that may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0179] Processor 1235 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, ASICs, CPUs, GPUs, FPGAs, microcontrollers, programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof). In some cases, processor 1235 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1235. Processor 1235 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1225) to cause device 1205 to perform various functions (e.g., functions or tasks supporting an SFN transmission scheme for SRS). For example, device 1205 or components of device 1205 may include processor 1235 and memory 1225 coupled to processor 1235, and processor 1235 and memory 1225 are configured to perform the various functions described herein. Processor 1235 may be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software such as an operating system, virtual machine, or container instance) that may (e.g., by executing code 1230) host functions for performing the functions of device 1205. Processor 1235 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in device 1205 (such as within memory 1225). In some specific implementations, processor 1235 may be a component of a processing system. A processing system generally may refer to a system or series of machines or components that receive inputs and process those inputs to produce a set of outputs (the set of outputs may be passed to, for example, other systems or components of device 1205). For example, the processing system of device 1205 may refer to a system that includes various other components or sub-components of device 1205 such as processor 1235 or transceiver 1210 or communication manager 1220 or a combination of other components or components of device 1205. The processing system of device 1205 may interface with other components of device 1205 and may process information (such as inputs or signals) received from other components or output information to other components. For example, a chip or modem of device 1205 may include a processing system and one or more interfaces for outputting information or for obtaining information or both. The one or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information, or the same interface configured to output information and obtain information, and other specific implementations. In some specific implementations, the one or more interfaces may refer to an interface between the processing system of a chip or modem and a transmitter such that device 1205 may transmit information output from the chip or modem.Additionally or alternatively, in some embodiments, the one or more interfaces may refer to an interface between the processing system of a chip or modem and the receiver, such that the device 1205 can obtain information or signal input, and the information can be passed to the processing system. One of ordinary skill in the art will readily recognize that the first interface may also obtain information or signal input, and the second interface may also output information or signal output.

[0180] In some examples, the bus 1240 may support communication within a protocol layer of a protocol stack (e.g., within the protocol layer). In some examples, the bus 1240 may support communication associated with a logical channel of a protocol stack (e.g., between protocol layers of the protocol stack), which may include communication performed within components of the device 1205, or communication performed between different components of the device 1205 that may be co-located or located at different positions (e.g., where the device 1205 may refer to a system in which one or more of the communication manager 1220, transceiver 1210, memory 1225, code 1230, and processor 1235 may be located in one component or divided among different components).

[0181] In some examples, the communication manager 1220 may manage aspects of communication with the core network 130 (e.g., via one or more wired or wireless backhaul links). For example, the communication manager 1220 may manage the transmission of data communication for client devices such as one or more UEs 115. In some examples, the communication manager 1220 may manage communication with other network entities 105, and may include a controller or scheduler for coordinating with other network entities 105 to control communication with the UEs 115. In some examples, the communication manager 1220 may support the X2 interface within the LTE / LTE-A wireless communication network technology to provide communication between network entities 105.

[0182] According to examples disclosed herein, the communication manager 1220 may support wireless communication at a network entity. For example, the communication manager 1220 may be configured to or otherwise support a component for sending a control message indicating a configuration of an SFN communication scheme for one or more SRSs, where the SFN communication scheme is configured for a respective antenna port associated with one or more SRSs, and each of the respective antenna ports is associated with at least two directional beams. The communication manager 1220 may be configured to or otherwise support a component for receiving one or more SRSs via at least two directional beams according to the SFN communication scheme.

[0183] By including or configuring a communication manager 1220 according to examples as described herein, the device 1205 may support techniques for improving communication reliability, reducing latency, improving the user experience associated with processing reduction, more efficiently utilizing communication resources, improving coordination between devices, improving power savings, increasing uplink throughput and reliability, increasing coverage, and extending support for SFN communication for uplink communication.

[0184] In some examples, the communication manager 1220 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with the transceiver 1210, one or more antennas 1215 (e.g., where applicable), or any combination thereof. Although the communication manager 1220 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1220 may be supported or performed by the transceiver 1210, the processor 1235, the memory 1225, the code 1230, or any combination thereof. For example, the code 1230 may include instructions that can be executed by the processor 1235 to cause the device 1205 to perform various aspects of the SFN transmission scheme for SRS as described herein, or the processor 1235 and the memory 1225 may otherwise be configured to perform or support such operations.

[0185] Figure 13 A flowchart illustrating a method 1300 that supports an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure is shown. The operations of the method 1300 may be implemented by a UE or its components as described herein. For example, the operations of the method 1300 may be performed by a UE 115 as described with reference to Figures 1 to 8 as described. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0186] At 1305, the method may include receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, where respective antenna ports of the UE for transmitting one or more SRSs are each associated with at least two directional beams. The operation of 1305 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation of 1305 may be performed by an SRS configuration component 725 as described with reference to Figure 7 as described.

[0187] At 1310, the method may include transmitting one or more SRSs via at least two directional beams in accordance with the SFN communication scheme. The operation of 1310 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation of 1310 may be performed by anFigure 7 performed by the described SFN communication component 730.

[0188] Figure 14 FIG. 1400 illustrates a flow diagram of a method 1400 that supports an SFN transmission scheme for SRSs in accordance with one or more aspects of the present disclosure. Operations of method 1400 may be implemented by a UE or components thereof as described herein. For example, operations of method 1400 may be performed by a UE 115 as described with reference to Figures 1 to 8 the UE described. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0189] At 1405, the method may include receiving a control message that indicates a configuration of an SFN communication scheme for one or more SRSs, where respective antenna ports of the UE for transmitting the one or more SRSs are each associated with at least two directional beams. The operation of 1405 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation of 1405 may be performed by an SRS configuration component 725 as described with reference to Figure 7 the SRS configuration component described.

[0190] At 1410, the method may include receiving a DCI message that includes an SRS resource indicator, a transmit precoding indicator, or both, where the SRS resource indicator, the transmit precoding indicator, or both include an indication of at least two precoders to be applied to at least two directional beams. The operation of 1410 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation of 1410 may be performed by a precoding component 735 as described with reference to Figure 7 the precoding component described.

[0191] At 1415, the method may include transmitting an uplink data channel via at least two directional beams in accordance with at least two precoders and the SFN communication scheme. The operation of 1415 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation of 1415 may be performed by an SFN communication component 730 as described with reference to Figure 7 the SFN communication component described.

[0192] At 1420, the method may include transmitting one or more SRSs via at least two directional beams in accordance with the SFN communication scheme. The operation of 1420 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation of 1420 may be performed by an SFN communication component 730 as described with reference to Figure 7 the SFN communication component described.

[0193] Figure 15Illustrates a flowchart of a method 1500 that supports an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure. Operations of method 1500 may be implemented by a UE or components thereof as described herein. For example, operations of method 1500 may be performed by a UE 115 as described with reference to Figures 1 to 8 In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0194] At 1505, the method may include receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein respective antenna ports of the UE for transmitting one or more SRSs are each associated with at least two directional beams. The operation of 1505 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1505 may be performed by an SRS configuration component 725 as described with reference to Figure 7 At 1510, the method may include receiving a DCI message indicating one or more power control parameters corresponding to at least two directional beams. The operation of 1510 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1510 may be performed by a power control management component 740 as described with reference to

[0195] At 1515, the method may include applying one or more power control parameters to at least two directional beams based at least in part on the DCI message. The operation of 1515 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1515 may be performed by a power control management component 740 as described with reference to Figure 7 At 1520, the method may include transmitting one or more SRSs via at least two directional beams in accordance with the SFN communication scheme. The operation of 1520 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1520 may be performed by an SFN communication component 730 as described with reference to

[0196] At 1515, the method may include applying one or more power control parameters to at least two directional beams based at least in part on the DCI message. The operation of 1515 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1515 may be performed by a power control management component 740 as described with reference to Figure 7 At 1520, the method may include transmitting one or more SRSs via at least two directional beams in accordance with the SFN communication scheme. The operation of 1520 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1520 may be performed by an SFN communication component 730 as described with reference to

[0197] At 1520, the method may include transmitting one or more SRSs via at least two directional beams in accordance with the SFN communication scheme. The operation of 1520 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1520 may be performed by an SFN communication component 730 as described with reference to Figure 7 Illustrates a flowchart of a method 1600 that supports an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure. Operations of method 1600 may be implemented by a network entity or components thereof as described herein. For example, operations of method 1600 may be performed by as described with reference to

[0198] Figure 16 Illustrates a flowchart of a method 1600 that supports an SFN transmission scheme for SRS in accordance with one or more aspects of the present disclosure. Operations of method 1600 may be implemented by a network entity or components thereof as described herein. For example, operations of method 1600 may be performed by as described with reference to Figures 1 to 4 and Figures 9 to 12performed by the described network entity. In some examples, the network entity may execute a set of instructions to control functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform aspects of the described functions.

[0199] At 1605, the method may include sending a control message indicating a configuration of an SFN communication scheme for one or more SRSs, where the SFN communication scheme is configured for corresponding antenna ports associated with the one or more SRSs, and each of the corresponding antenna ports is associated with at least two directional beams. The operation of 1605 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1605 may be performed by the SRS configuration component 1125 as described in reference to Figure 11 what is described.

[0200] At 1610, the method may include receiving one or more SRSs via at least two directional beams according to the SFN communication scheme. The operation of 1610 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1610 may be performed by the SFN communication component 1130 as described in reference to Figure 11 what is described.

[0201] An overview of aspects of the present disclosure is provided below:

[0202] Aspect 1: A method for wireless communication at a UE, the method comprising: receiving a control message indicating a configuration of an SFN communication scheme for one or more SRSs, where corresponding antenna ports of the UE for transmitting the one or more SRSs are each associated with at least two directional beams; and transmitting the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0203] Aspect 2: The method according to aspect 1, the method further comprising: receiving a DCI message including an SRI, a transmit precoding indicator, or both, the SRI, the transmit precoding indicator, or both including an indication of at least two precoders to be applied to the at least two directional beams; and transmitting an uplink data channel via the at least two directional beams according to the at least two precoders and the SFN communication scheme.

[0204] Aspect 3: The method according to aspect 2, wherein the uplink data channel includes a codebook-based uplink data channel, and the at least two precoders are at least partially based on the at least two directional beams associated with the SFN communication scheme for transmitting the one or more SRSs.

[0205] Aspect 4: The method according to any one of Aspects 2 to 3, wherein the uplink data channel comprises a non-codebook-based uplink data channel, and the at least two pre-coders are determined at least in part based on the at least two directional beams associated with the SFN communication scheme for transmitting the subset of the one or more SRSs.

[0206] Aspect 5: The method according to any one of Aspects 1 to 4, the method further comprising: receiving two or more SRIs, two or more transmit pre-coding indicators, or a combination thereof, comprising an indication of the at least two pre-coders to be applied to the at least two directional beams; and transmitting an uplink data channel via the at least two directional beams according to the at least two pre-coders and the SFN communication scheme.

[0207] Aspect 6: The method according to Aspect 5, wherein the uplink data channel comprises a codebook-based uplink data channel, and the two or more SRIs, the two or more transmit pre-coding indicators, or a combination thereof indicate the at least two pre-coders associated with the SFN transmission of the one or more SRSs.

[0208] Aspect 7: The method according to any one of Aspects 5 to 6, wherein the uplink data channel comprises a non-codebook-based uplink data channel, and the two or more SRIs indicate the at least two pre-coders associated with the SFN transmission of the subset of the one or more SRSs.

[0209] Aspect 8: The method according to any one of Aspects 1 to 7, wherein the control message comprises an RRC message, the method further comprising: applying the SFN communication scheme to an SRS resource set associated with each SRS of the one or more SRSs according to the RRC message.

[0210] Aspect 9: The method according to any one of Aspects 1 to 8, wherein the control message comprises an RRC message, the method further comprising: applying the SFN communication scheme to an SRS resource corresponding to at least one SRS of the one or more SRSs associated with the SRS resource set according to the RRC message.

[0211] Aspect 10: The method according to any one of Aspects 1 to 9, wherein the one or more SRSs comprise one or more aperiodic SRSs, and the control message comprises a DCI message, and wherein transmitting the one or more SRSs further comprises: transmitting the one or more aperiodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the DCI message.

[0212] Aspect 11: The method according to any one of Aspects 1 to 10, wherein the one or more SRSs include one or more semi-periodic SRSs, and the control message includes a MAC-CE, and wherein transmitting the one or more SRSs further includes: transmitting the one or more semi-periodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the MAC-CE.

[0213] Aspect 12: The method according to any one of Aspects 1 to 11, wherein the one or more SRSs include one or more periodic SRSs, and the control message includes an RRC message, and wherein transmitting the one or more SRSs further includes: transmitting the one or more periodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the RRC message.

[0214] Aspect 13: The method according to any one of Aspects 1 to 12, wherein transmitting the one or more SRSs further includes: transmitting the one or more SRSs according to the SFN communication scheme at least partially based on the one or more SRSs being associated with the at least two directional beams.

[0215] Aspect 14: The method according to any one of Aspects 1 to 13, the method further includes: receiving a DCI message indicating one or more power control parameters corresponding to the at least two directional beams; and applying the one or more power control parameters to the at least two directional beams at least partially based on the DCI message.

[0216] Aspect 15: The method according to Aspect 14, wherein the one or more power control parameters include a first power control parameter and a second power control parameter, the method further includes: applying the first power control parameter to a first directional beam of the at least two directional beams, and applying the second power control parameter to a second directional beam of the at least two directional beams.

[0217] Aspect 16: The method according to any one of Aspects 14 to 15, wherein the one or more power control parameters include a single power control parameter, the method further includes: applying the single power control parameter to a first directional beam of the at least two directional beams and a second directional beam of the at least two directional beams respectively.

[0218] Aspect 17: The method according to any one of Aspects 14 to 16, wherein the one or more power control parameters include a single power control parameter, and the method further includes: applying a first portion of the single power control parameter to a first directional beam of the at least two directional beams, and applying a second portion of the single power control parameter to a second directional beam of the at least two directional beams.

[0219] Aspect 18: The method according to any one of Aspects 14 to 17, wherein the DCI message includes a group common DCI message, a first DCI message format, a second DCI message format, or any combination thereof.

[0220] Aspect 19: The method according to any one of Aspects 1 to 18, wherein the at least two directional beams are associated with at least two unified TCI states, at least two spatial relation information parameters, or any combination thereof.

[0221] Aspect 20: A method for wireless communication at a network entity, the method including: sending a control message indicating a configuration of an SFN communication scheme for one or more SRSs, wherein the SFN communication scheme is configured for corresponding antenna ports associated with the one or more SRSs, and the corresponding antenna ports are each associated with at least two directional beams; and receiving the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

[0222] Aspect 21: The method according to Aspect 20, the method further including: sending one or more SRIs, one or more transmit precoding indicators, or any combination thereof, including an indication of at least two precoders to be applied to the at least two directional beams; and receiving an uplink data channel via the at least two directional beams according to the at least two precoders and the SFN communication scheme.

[0223] Aspect 22: The method according to any one of Aspects 20 to 21, wherein the control message includes an RRC message, and wherein receiving the one or more SRSs includes: receiving each of the one or more SRSs associated with an SRS resource set, at least partially based on the RRC message, the SRS resource set being configured with the SFN communication scheme.

[0224] Aspect 23: The method according to any one of aspects 20 to 22, wherein the control message includes an RRC message, and wherein receiving the one or more SRSs includes: receiving at least one SRS of the one or more SRSs associated with an SRS resource set at least partially based on the RRC message, and a corresponding SRS resource associated with the at least one SRS of the one or more SRSs is configured with the SFN communication scheme.

[0225] Aspect 24: The method according to any one of aspects 20 to 23, wherein the one or more SRSs include one or more aperiodic SRSs, and the control message includes a DCI message, and wherein receiving the one or more SRSs includes: receiving the one or more aperiodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the DCI message.

[0226] Aspect 25: The method according to any one of aspects 20 to 24, wherein the one or more SRSs include one or more semi-periodic SRSs, and the control message includes a MAC-CE, and wherein receiving the one or more SRSs includes: receiving the one or more semi-periodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the MAC-CE.

[0227] Aspect 26: The method according to any one of aspects 20 to 25, wherein the one or more SRSs include one or more periodic SRSs, and the control message includes an RRC message, and wherein receiving the one or more SRSs includes: receiving the one or more periodic SRSs via the at least two directional beams according to the SFN communication scheme indicated by the RRC message.

[0228] Aspect 27: The method according to any one of aspects 20 to 26, the method further includes: sending a DCI message indicating one or more power control parameters corresponding to the at least two directional beams; and receiving signaling via the at least two directional beams at least partially based on the one or more power control parameters and the DCI message.

[0229] Aspect 28: The method according to aspect 27, wherein the one or more power control parameters correspond to both a first directional beam of the at least two directional beams and a second directional beam of the at least two directional beams.

[0230] Aspect 29: An apparatus for wireless communication at a UE, the apparatus comprising: at least one processor; and a memory coupled to the at least one processor, the memory storing instructions executable by the at least one processor to cause the UE to perform the method according to any one of Aspects 1 to 19.

[0231] Aspect 30: An apparatus for wireless communication at a UE, the apparatus comprising at least one component for performing the method according to any one of Aspects 1 to 19.

[0232] Aspect 31: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of Aspects 1 to 19.

[0233] Aspect 32: An apparatus for wireless communication at a network entity, the apparatus comprising: at least one processor; and a memory coupled to the at least one processor, the memory storing instructions executable by the at least one processor to cause the network entity to perform the method according to any one of Aspects 20 to 28.

[0234] Aspect 33: An apparatus for wireless communication at a network entity, the apparatus comprising at least one component for performing the method according to any one of Aspects 20 to 28.

[0235] Aspect 34: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by at least one processor to perform the method according to any one of Aspects 20 to 28.

[0236] It should be noted that the methods described herein describe possible specific implementations, and the operations and steps may be rearranged or otherwise modified and other specific implementations are also possible. In addition, aspects from two or more methods may be combined.

[0237] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems can be multi-access systems that can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless network (e.g., a wireless local area network (WLAN), such as a Wi-Fi (e.g., Institute of Electrical and Electronics Engineers (IEEE) 802.11) network) can include access points (APs) that can communicate with one or more wireless or mobile devices. The AP can be coupled to a network such as the Internet and can enable the mobile device to communicate via the network (or communicate with other devices coupled to the access point). Wireless devices can communicate bidirectionally with network devices. For example, in a WLAN, a device can communicate with an associated AP via a downlink (e.g., a communication link from the AP to the device) and an uplink (e.g., a communication link from the device to the AP). A wireless personal area network (PAN), which can include Bluetooth connections, can provide short-range wireless connections between two or more paired wireless devices. For example, a wireless device such as a cellular phone can utilize wireless PAN communication to exchange information such as audio signals with a wireless headset. Components within a wireless communication system can be coupled to each other (e.g., operatively coupled, communicatively coupled, functionally coupled, electronically coupled, and / or electrically coupled).

[0238] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and the LTE, LTE-A, LTE-A Pro, or NR terms may be used in most of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein, including future systems and radio technologies.

[0239] The information and signals described herein can be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips referred to throughout the specification can be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0240] The various illustrative block diagrams and components described in connection with the present disclosure may be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, a GPU, 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 may be a microprocessor, but in the alternative, the at least one processor may be any processor, controller, microcontroller, or state machine. The processor may 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).

[0241] The functions described herein may be implemented using hardware, software (e.g., executed by a processor), or any combination thereof. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, whether referred to in software, firmware, middleware, microcode, hardware description language, or otherwise. If implemented using software executed by a processor, the functions may be stored as one or more instructions or code on a computer-readable medium or transmitted using one or more instructions or code on a computer-readable medium. Other examples and specific implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software, firmware, hardwiring, or any combination thereof executed by a processor. The features implementing the functions may also be physically located at different positions, including being distributed such that portions of the functions are implemented at different physical locations.

[0242] A computer-readable medium includes both a non-transitory computer storage medium and a communication medium, where the communication medium includes any medium that facilitates transfer of a computer program from one location to another. The non-transitory storage medium can be any available medium that can be accessed by a general or special purpose computer. By way of example and not limitation, the non-transitory computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, phase change memory, compact disc (CD) ROM or other optical disc 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 components 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. Also, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (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. A disk can magnetically reproduce data, and a disc can optically reproduce data using a laser. Combinations of the above are also included within the scope of computer-readable medium.

[0243] As used herein, in the claims, in a listing of items (e.g., a listing of items that is accompanied by a phrase such as “at least one of” or “one or more of”), the “or” 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). Additionally, as used herein, the phrase “based on” should not be construed as a reference to a closed set of conditions. For example, an example step described as “based on condition A” can 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”. As used herein, when the term “and / or” is used in a list of two or more items, it means that any one of the listed items can be taken alone, or any combination of two or more of the listed items can be taken. For example, if a composition is described as including components A, B, and / or C, the composition can include A alone; B alone; C alone; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C.

[0244] The term "determine" encompasses a variety of actions, and thus, "determine" can include operations, calculations, processing, derivation, investigation, lookup (such as by looking up in a table, database, or other data structure), ascertaining, and similar actions. Additionally, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Further, "determine" can include parsing, obtaining, selecting, picking, establishing, and other such similar actions.

[0245] In the figures, similar components or features may have the same reference numeral. Additionally, various components of the same type can be distinguished by adding a dash and a second numeral used to differentiate between similar components after the reference numeral. If only the first reference numeral is used in the specification, the description can apply to any of the similar components having the same first reference numeral, regardless of the second reference numeral or other subsequent reference numerals.

[0246] The description set forth herein in conjunction with the figures describes example configurations and does not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and not "preferred" or "advantageous over other examples". The detailed description includes specific details for providing an understanding of the described techniques. However, these techniques 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.

[0247] The present description is provided 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 can 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 should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: at least one processor; and a memory coupled to the at least one processor, the at least one processor being configurable via instructions stored in the memory to cause the UE to: receive a control message indicating a configuration of a single-frequency network communication scheme for one or more sounding reference signals, wherein respective antenna ports of the UE for transmitting the one or more sounding reference signals are each associated with at least two directional beams; and and transmit the one or more sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme.

2. The apparatus according to claim 1, wherein the at least one processor is further configurable via the instructions to cause the UE to: receive a downlink control information message comprising a sounding reference signal resource indicator, a transmit precoding indicator, or both, the sounding reference signal resource indicator, the transmit precoding indicator, or both comprising an indication of at least two precoders to be applied to the at least two directional beams; and transmit an uplink data channel via the at least two directional beams according to the at least two precoders and the single-frequency network communication scheme.

3. The apparatus according to claim 2, wherein the uplink data channel comprises a codebook-based uplink data channel, and the at least two precoders are at least partially based on the at least two directional beams for transmitting the one or more sounding reference signals associated with the single-frequency network communication scheme.

4. The apparatus according to claim 2, wherein the uplink data channel comprises a non-codebook-based uplink data channel, and the at least two precoders are determined at least partially based on the at least two directional beams for a subset of the one or more sounding reference signals associated with the single-frequency network communication scheme.

5. The apparatus according to claim 1, wherein the at least one processor is further configurable via the instructions to cause the UE to: receive two or more sounding reference signal resource indicators, two or more transmit precoding indicators, or a combination thereof, comprising an indication of at least two precoders to be applied to the at least two directional beams; and transmit an uplink data channel via the at least two directional beams according to the at least two precoders and the single-frequency network communication scheme.

6. The apparatus according to claim 5, wherein the uplink data channel comprises a codebook-based uplink data channel, and the two or more sounding reference signal resource indicators, the two or more transmit precoding indicators, or a combination thereof indicate the at least two precoders associated with the single-frequency network transmission of the one or more sounding reference signals.

7. The apparatus according to claim 5, wherein the uplink data channel comprises a non-codebook-based uplink data channel, and the two or more sounding reference signal resource indicators indicate the at least two precoders associated with single-frequency network transmission of a subset of the one or more sounding reference signals.

8. The apparatus according to claim 1, wherein the control message comprises a radio resource control message, and the at least one processor is further configurable via the instructions to cause the UE to: Apply the single-frequency network communication scheme to a set of sounding reference signal resources associated with each of the one or more sounding reference signals according to the radio resource control message.

9. The apparatus according to claim 1, wherein the control message comprises a radio resource control message, and the at least one processor is further configurable via the instructions to cause the UE to: Apply the single-frequency network communication scheme to a sounding reference signal resource corresponding to at least one of the one or more sounding reference signals associated with a set of sounding reference signal resources according to the radio resource control message.

10. The apparatus according to claim 1, wherein the one or more sounding reference signals comprise one or more aperiodic sounding reference signals, and the control message comprises a downlink control information message, and the at least one processor is further configurable via the instructions to transmit the one or more sounding reference signals and cause the UE to: Transmit the one or more aperiodic sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme indicated by the downlink control information message.

11. The apparatus according to claim 1, wherein the one or more sounding reference signals comprise one or more semi-periodic sounding reference signals, and the control message comprises a media access control-control element, and the at least one processor is further configurable via the instructions to transmit the one or more sounding reference signals and cause the UE to: Transmit the one or more semi-periodic sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme indicated by the media access control-control element.

12. The apparatus according to claim 1, wherein the one or more sounding reference signals comprise one or more periodic sounding reference signals, and the control message comprises a radio resource control message, and the at least one processor is further configurable via the instructions to transmit the one or more sounding reference signals and cause the UE to: Transmit the one or more periodic sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme indicated by the radio resource control message.

13. The apparatus according to claim 1, wherein the at least one processor is further configurable via the instructions to transmit the one or more sounding reference signals and cause the UE to: Transmit the one or more sounding reference signals according to the single-frequency network communication scheme, at least in part based on the one or more sounding reference signals being associated with the at least two directional beams.

14. The apparatus according to claim 1, wherein the at least one processor can be further configured via the instructions to cause the UE to: Receive a downlink control information message indicating one or more power control parameters corresponding to the at least two directional beams; and Apply the one or more power control parameters to the at least two directional beams, at least in part based on the downlink control information message.

15. The apparatus according to claim 14, wherein the one or more power control parameters include a first power control parameter and a second power control parameter, and the at least one processor can be further configured via the instructions to cause the UE to: Apply the first power control parameter to a first directional beam of the at least two directional beams, and apply the second power control parameter to a second directional beam of the at least two directional beams.

16. The apparatus according to claim 14, wherein the one or more power control parameters include a single power control parameter, and the at least one processor can be further configured via the instructions to cause the UE to: Apply the single power control parameter to a first directional beam of the at least two directional beams and a second directional beam of the at least two directional beams, respectively.

17. The apparatus according to claim 14, wherein the one or more power control parameters include a single power control parameter, and the at least one processor can be further configured via the instructions to cause the UE to: Apply a first portion of the single power control parameter to a first directional beam of the at least two directional beams, and apply a second portion of the single power control parameter to a second directional beam of the at least two directional beams.

18. The apparatus according to claim 14, wherein the downlink control information message includes a group common downlink control information message, a first downlink control information message format, a second downlink control information message format, or any combination thereof.

19. The apparatus according to claim 1, wherein the at least two directional beams are associated with at least two unified transmission configuration indicator states, at least two spatial relation information parameters, or any combination thereof.

20. An apparatus for wireless communication at a network entity, the apparatus comprising: At least one processor; And A memory coupled to the at least one processor, the at least one processor being configurable via instructions stored in the memory to cause the network entity to: Transmit a control message indicating a configuration of a single-frequency network communication scheme for one or more sounding reference signals, wherein the single-frequency network communication scheme is configured for corresponding antenna ports associated with the one or more sounding reference signals, and the corresponding antenna ports are each associated with at least two directional beams; And Receive the one or more sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme.

21. The apparatus according to claim 20, wherein the at least one processor is further configurable via the instructions to cause the network entity to: Transmit one or more sounding reference signal resource indicators, one or more transmission precoding indicators, or any combination thereof, including an indication of at least two precoders to be applied to the at least two directional beams, and Receive an uplink data channel via the at least two directional beams according to the at least two precoders and the single-frequency network communication scheme.

22. The apparatus according to claim 20, wherein the control message includes a radio resource control message, and the at least one processor is further configurable via the instructions to receive the one or more sounding reference signals and cause the network entity to: Receive each of the one or more sounding reference signals associated with a sounding reference signal resource set, at least partially based on the radio resource control message, the sounding reference signal resource set being configured with the single-frequency network communication scheme.

23. The apparatus according to claim 20, wherein the control message includes a radio resource control message, and the at least one processor is further configurable via the instructions to receive the one or more sounding reference signals and cause the network entity to: Receive at least one of the one or more sounding reference signals associated with a sounding reference signal resource set, at least partially based on the radio resource control message, a corresponding sounding reference signal resource associated with the at least one of the one or more sounding reference signals being configured with the single-frequency network communication scheme.

24. The apparatus according to claim 20, wherein the one or more sounding reference signals include one or more aperiodic sounding reference signals, and the control message includes a downlink control information message, and the at least one processor is further configurable via the instructions to receive the one or more sounding reference signals and cause the network entity to: Receive the one or more aperiodic sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme indicated by the downlink control information message.

25. The apparatus according to claim 20, wherein the one or more sounding reference signals include one or more semi-periodic sounding reference signals, and the control message includes a media access control-control element, and the at least one processor is further configurable via the instructions to receive the one or more sounding reference signals and cause the network entity to: Receive the one or more semi-periodic sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme indicated by the media access control-control element.

26. The apparatus according to claim 20, wherein the one or more sounding reference signals comprise one or more periodic sounding reference signals, and the control message comprises a radio resource control message, and the at least one processor is further configurable via the instructions to receive the one or more sounding reference signals and cause the network entity to: receive the one or more periodic sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme indicated by the radio resource control message.

27. The apparatus according to claim 20, wherein the at least one processor is further configurable via the instructions to cause the network entity to: send a downlink control information message v indicating one or more power control parameters corresponding to the at least two directional beams and receive signaling via the at least two directional beams at least partially based on the one or more power control parameters and the downlink control information message.

28. The apparatus according to claim 27, wherein the one or more power control parameters correspond to both a first directional beam among the at least two directional beams and a second directional beam among the at least two directional beams.

29. A method for wireless communication at a user equipment (UE), the method comprising: receiving a control message indicating a configuration of a single-frequency network communication scheme for one or more sounding reference signals, wherein respective antenna ports of the UE for transmitting the one or more sounding reference signals are each associated with at least two directional beams; and transmitting the one or more sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme.

30. A method for wireless communication at a network entity, the method comprising: sending a control message indicating a configuration of a single-frequency network communication scheme for one or more sounding reference signals, wherein the single-frequency network communication scheme is configured for respective antenna ports associated with the one or more sounding reference signals, the respective antenna ports being each associated with at least two directional beams; and receiving the one or more sounding reference signals via the at least two directional beams according to the single-frequency network communication scheme.

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