Power scaling and splitting for uplink high resolution TPMI

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) or some other network node may scale uplink shared channel transmit power based on a high resolution transmitted precoding matrix indicator (TPMI) received from the network node. For example, the UE may calculate a ratio for one or more antenna ports of the UE based on a coefficient magnitude from the TPMI, and may determine a scaling factor based on a comparison between the ratio and a threshold. The described techniques may also enable the UE to split power for the one or more antenna ports of the UE based on the received high resolution TPMI. For example, the UE may calculate a ratio for each antenna port based on a coefficient magnitude from the TPMI, and may determine how power will be split across antenna ports based on a comparison between the ratio and a threshold.

Description

[0001] introduction

[0002] The following relates to wireless communications, including power scaling and splitting for transmission. Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message reception and transmission, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency and power). Various aspects of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (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 use 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 extended orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each of which supports wireless communications for a communication device, which may be referred to as a user equipment (UE). Summary of the invention

[0003] The described techniques relate to improved methods, systems, devices, and apparatuses that support power scaling and splitting for uplink high-resolution transmitted pre-coded matrix indicators (TPMIs). For example, the described techniques may enable a user equipment (UE) or some other network node to scale uplink shared channel transmit power based on a high-resolution TPMI received from a network node. For example, the UE may calculate a ratio for one or more antenna ports of the UE based on coefficient magnitudes from the TPMI, and may determine a scaling factor based on a comparison between the ratio and a threshold. The described techniques may also enable the UE to split power for the one or more antenna ports of the UE based on the received high-resolution TPMI. For example, the UE may calculate a ratio for each antenna port based on coefficient magnitudes from the TPMI, and may determine how to split power across antenna ports based on a comparison between the ratio and a threshold. By scaling and splitting the power for uplink shared channel transmission, when the UE receives a high-resolution TPMI, the UE may be able to correctly allocate power to antenna ports for transmission.

[0004] A method for wireless communication at a first network node is described. The method may include: receiving information from a second network node indicating a pre-decoder to be applied to an uplink shared channel transmission; modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the pre-decoder; and transmitting the uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0005] A first network node for wireless communication (e.g., an apparatus for wireless communication at a first network node) is described. The first network node may include a memory and at least one processor, the at least one processor being coupled to the memory. The at least one processor may be configured to: receive information indicating a predecoder to be applied to an uplink shared channel transmission from a second network node; modify a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein to modify the first transmit power, the at least one processor is configured to: modify the first transmit power based on one or more coefficients associated with the predecoder; and transmit the uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0006] Another apparatus for wireless communication at a first network node is described. The apparatus may include: means for receiving information indicating a pre-decoder to be applied to an uplink shared channel transmission from a second network node; means for modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the pre-decoder; and means for transmitting the uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0007] A non-transitory computer-readable medium having code for wireless communication at a first network node is described. The code, when executed by the first network node, causes the first network node to: receive information indicating a pre-decoder to be applied to an uplink shared channel transmission from a second network node; modify a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the pre-decoder; and transmit the uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0008] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, modifying the first transmit power may include operations, features, components, or instructions for performing the following: scaling the first transmit power by a power scaling factor to produce the second transmit power, wherein the power scaling factor may be based on one or more coefficients associated with the predecoder; and splitting the second transmit power across one or more antenna ports.

[0009] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, the power scaling factor may be based on a comparison of a ratio to a threshold, and the ratio corresponds to one of the one or more coefficients divided by a sum of the one or more coefficients.

[0010] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, the power scaling factor may be based on power headroom information corresponding to an amount of available transmit power.

[0011] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, the power headroom information includes respective power headroom information for each respective antenna port of the one or more antenna ports.

[0012] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, the power scaling factor may be a first value if the ratio may be less than or equal to the threshold, or the power scaling factor may be a second value if the ratio may be greater than or equal to the threshold.

[0013] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, each antenna port of the one or more antenna ports corresponds to a respective port-specific threshold.

[0014] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, the threshold corresponds to each antenna port of the one or more antenna ports.

[0015] Some aspects of the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for sending information indicating the threshold to the second network node.

[0016] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, splitting the second transmit power across the one or more antenna ports may include operations, features, means, or instructions for: splitting the second transmit power based on the ratio.

[0017] Some aspects of the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for performing the following: sending a message indicating a corresponding threshold for each of the one or more antenna ports, wherein the power scaling factor may be based on a comparison of a ratio to one or more of the corresponding thresholds, and wherein the ratio corresponds to one of the one or more coefficients divided by a sum of the one or more coefficients.

[0018] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, modifying the first transmit power may include operations, features, components, or instructions for performing the following: scaling the first transmit power by a power scaling factor to produce a second transmit power; and splitting the second transmit power across one or more antenna ports based on one or more coefficients associated with the predecoder.

[0019] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, splitting the second transmit power may include operations, features, components, or instructions for performing the following: determining one or more power ratios corresponding to each of the one or more antenna ports based on the one or more coefficients associated with the predecoder, wherein a first portion of the one or more antenna ports corresponding to a power ratio exceeding a threshold includes a first antenna port set, and a second portion of the one or more antenna ports corresponding to a power ratio not exceeding the threshold includes a second antenna port set.

[0020] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, splitting the second transmit power may include operations, features, components, or instructions for performing the following: setting a corresponding power ratio for the first antenna port set equal to the threshold based on the power ratio exceeding the threshold before being set equal to the threshold; and allocating the second transmit power across the first antenna port set and the second antenna port set based on the one or more power ratios.

[0021] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, determining the one or more power ratios may include operations, features, components, or instructions for performing the following items: determining the one or more power ratios, wherein for each of the one or more antenna ports, the one or more power ratios across one or more transmission layers are based on the amplitude of the one or more transmission layers.

[0022] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, each antenna port of the one or more antenna ports corresponds to a respective port-specific threshold.

[0023] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, the threshold corresponds to each antenna port of the one or more antenna ports.

[0024] Some aspects of the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for sending information indicating the threshold to the second network node.

[0025] Some aspects of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for sending a message indicating a respective threshold for each of the one or more antenna ports.

[0026] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, splitting the second transmit power may include operations, features, components, or instructions for performing the following items: splitting the second transmit power based on the first transmit power and power headroom information corresponding to the amount of available transmit power.

[0027] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, the power headroom information includes respective power headroom information for each respective antenna port of the one or more antenna ports.

[0028] In some aspects of the methods, apparatus, and non-transitory computer-readable media described herein, scaling the first transmit power according to the power scaling factor may include operations, features, components, or instructions for performing the following items: scaling the first transmit power according to the power scaling factor that can be defined as the number of non-zero antenna ports divided by the number of sounding reference signal antenna ports. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An example of a wireless communication system supporting power scaling and splitting for uplink high resolution Transmitted Precoding Matrix Indicator (TPMI) in accordance with one or more aspects of the present disclosure is illustrated.

[0030] Figure 2 An example of a wireless communication system supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is illustrated.

[0031] Figure 3A and Figure 3B An example of a codebook scheme supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is illustrated.

[0032] Figure 4An example of a process flow supporting power scaling and splitting for uplink high resolution TPMI in accordance with one or more aspects of the present disclosure is illustrated.

[0033] Figure 5 and Figure 6 A block diagram of a device supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown.

[0034] Figure 7 A block diagram of a communication manager supporting power scaling and splitting for uplink high resolution TPMI is shown in accordance with one or more aspects of the present disclosure.

[0035] Figure 8 A diagram of a system including a device supporting power scaling and splitting for uplink high resolution TPMI in accordance with one or more aspects of the present disclosure is shown.

[0036] Figures 9 to 11 A flow chart illustrating a method of supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0037] A first network node, such as a user equipment (UE), may send an uplink shared channel (e.g., a physical uplink shared channel (PUSCH)) to a second network node (e.g., a base station, a network entity). To send the uplink shared channel, the UE may first send a sounding reference signal (SRS) to the network node, the network node may measure the SRS to determine one or more optimal resources for the uplink shared channel, the network node may send control signaling including a transmitted precoding matrix indicator (TPMI) to the UE, and the UE may use the TPMI to determine a precoder for allocating uplink transmit power to each antenna port (e.g., by looking up the allocation in a table). The UE may scale and / or split the uplink transmit power (using a power scaling factor) to ensure that the UE does not transmit more power than the power amplifier (PA) can handle. However, in some cases, the TPMI may be a high-resolution TPMI (i.e., the UE may calculate the precoder rather than look it up in a table), and thus the allocation of uplink transmit power to the various antenna ports may be higher resolution (e.g., by more efficiently allocating transmitted layers that benefit more from the increased power allocation than other layers). Because the power allocated to each antenna port may be any portion of the total transmit power (e.g., because the allocation is higher resolution), it is important to determine a power scaling factor to scale the uplink transmit power and / or determine a split allocation for each antenna port so that, for example, the PA of any antenna port is not allocated more power than it can handle.

[0038] In order to scale the PUSCH transmit power, the UE may scale the uplink transmit power based on the received high-resolution TPMI. For example, the UE may calculate a ratio for each antenna port based on the coefficient magnitude from the TPMI, and may determine the scaling factor based on a comparison between the ratio and a threshold. In order to properly split the power for each antenna port, the UE may split the power for each antenna port based on the received high-resolution TPMI. For example, the UE may calculate a ratio for each antenna port based on the coefficient magnitude from the TPMI, and may determine how to split the power across the antenna ports based on a comparison between the ratio and a threshold. By scaling and splitting the power for uplink transmission in any of these ways, when a high-resolution TPMI is received, the UE may be able to correctly allocate power to the antenna ports for transmission.

[0039] Various aspects of the present disclosure are first described in the context of a wireless communication system. Various aspects of the present disclosure are further illustrated by and described with reference to codebook schemes, process flows, apparatus diagrams, system diagrams, and flow charts involving power scaling and splitting for uplink high-resolution TPMI.

[0040] Figure 1 An example of a wireless communication system 100 that supports power scaling and splitting for uplink high resolution TPMI according to 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 aspects, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (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).

[0041] 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 aspects, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, etc. In some aspects, the network entities 105 and the UE 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 UE 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 UE 115 may support signal communications according to one or more radio access technologies (RATs).

[0042] 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 in FIG. 1 . The UEs 115 described herein may be capable of supporting communication with various types of devices, such as Figure 1 Communicate with other UEs 115 or network entities 105) as shown.

[0043] 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, an apparatus, a device, 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 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 relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from a second node.

[0044] In some aspects, the network entities 105 may communicate with the core network 130, or with each other, or both. For example, the network entities 105 may communicate with the 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, the network entities 105 may communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some aspects, the network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), etc. or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0045] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base station, a radio base station, an NR base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next-generation Node B, or a giga-Node B (any of which may be referred to as a gNB), a 5G NB, a next-generation eNB (ng-eNB), a home Node B, a home evolved Node B, or other suitable terms). In some aspects, the network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, stand-alone) base station architecture, which 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 a base station 140).

[0046] In some aspects, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a 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., a near real-time RIC (near RT RIC), a 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, a smart radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmit receive point (TRP). One or more components of the network entity 105 in the decomposed 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 aspects, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0047] The functional split between CU 160, DU 165, and RU 170 is flexible and may support different functionalities, depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a functional split of a protocol stack may be employed between CU 160 and DU 165 such that CU 160 may support one or more layers of a protocol stack and DU 165 may support one or more different layers of a protocol stack. In some aspects, CU 160 may host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functionality and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack may be employed between the DUs 165 and RUs 170, such that the DUs 165 may support one or more layers of the protocol stack, and the RUs 170 may support one or more different layers of the protocol stack. The DUs 165 may support one or more different cells (e.g., via one or more RUs 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 may be within the protocol layer (e.g., some functions of the protocol layer may be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by different ones of CU 160, DU 165, or RU 170). CU 160 may be further functionally split into CU control plane (CU-CP) and CU user plane (CU-UP) functions. CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., open fronthaul (FH) interface). In some aspects, midhaul communication link 162 or fronthaul communication link 168 may be implemented according to an interface (eg, channel) between layers of a protocol stack supported by respective network entities 105 communicating via such communication links.

[0048] In some wireless communication systems (e.g., wireless communication system 100), 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 nodes 104) may be partially controlled 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 supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by a coupled IAB donor's DU 165. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the 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 aspects, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0049] In the case where the techniques described herein are applied to the context of a decomposed RAN architecture, one or more components of the decomposed RAN architecture may be configured to support power scaling and splitting for uplink high resolution TPMI as described herein. For example, some operations described as being performed by UE 115 or network entity 105 (e.g., base station 140) may additionally or alternatively be performed by one or more components of the decomposed RAN architecture (e.g., IAB node 104, DU 165, CU 160, RU 170, RIC 175, SMO 180).

[0050] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some aspects, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in, for example, an appliance or a vehicle, a meter, etc.

[0051] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may 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. Figure 1 shown.

[0052] The UE 115 and the network entity 105 may use resources associated with one or more carriers to wirelessly communicate with each other via one or more communication links 125 (e.g., access links). The term "carrier" may refer to a collection of RF spectrum resources having a physical layer structure defined to support the communication link 125. For example, a carrier for the communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with 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 a device and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of a network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0053] As described herein, a node (which may be referred to as a node, a network node, a network entity, or a wireless node) may include, may be, or may be included in (e.g., as a component of) a base station (e.g., any base station described herein), a UE (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, an integrated access and backhaul (IAB) node, a distributed unit (DU), a central unit (CU), a remote / radio unit (RU) (which may also be referred to as a remote radio unit (RRU)), and / or another processing entity configured to perform any of the techniques described herein. For example, the network node may be a UE. For another example, the network node may be a base station or a network entity. For another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a UE. In another aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a base station. In yet other aspects of this example, the first network node, the second network node, and the third network node may be different relative to these examples. Similarly, references to UE, base station, device, equipment, computing system, etc. may include disclosure of UE, base station, device, equipment, computing system, etc. as a network node. For example, a disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with the present disclosure, once a specific example is expanded according to the present disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node), a broader example of a narrower example may be interpreted in reverse, but in a broad, open-ended manner. In the above example where a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node, the first network node may refer to a first UE configured to receive information, a first base station, a first device, a first device, a first computing system, a first set of one or more components, a first processing entity, etc.; and the second network node may refer to a second UE, a second base station, a second device, a second device, a second computing system, a second set of one or more components, a second processing entity, etc.

[0054] As described herein, different terms may be used in various aspects to describe the communication of information (e.g., any information, signal, etc.). Disclosure of one communication term includes disclosure of other communication terms. For example, a first network node may be described as being configured to send information to a second network node. In this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the first network node is configured to provide, transmit, output, communicate, or send information to the second network node. Similarly, in this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the second network node is configured to receive, obtain, or decode information provided, transmitted, output, communicated, or sent by the first network node.

[0055] The signal waveform transmitted via the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may refer to a 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 coding rate of the modulation scheme, or both), so that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high order modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers, beams), and the use of multiple spatial resources may increase the data rate or data integrity used for communication with UE 115.

[0056] The time interval for the network entity 105 or the UE 115 may be expressed in multiples of a basic time unit, which may be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the supported subcarrier spacing, and N f The supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0057] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some aspects, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended in front of each symbol period). In some wireless communication systems 100, the time slot may be further divided into a plurality of mini-time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0058] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmit time interval (TTI). In some aspects, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0059] Physical channels may be multiplexed according to various techniques in order to communicate using a carrier. For example, physical control channels and physical data channels may be multiplexed using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique to signal via a downlink carrier. A control region (e.g., a control resource set (CORESET)) of a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more UEs in UE115 may monitor or search a control region to obtain control information according to one or more search space sets, and each search space set may 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 may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to a plurality of UEs 115 , and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0060] In some aspects, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and, therefore, provide communication coverage for mobile coverage areas 110. In some aspects, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other aspects, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0061] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). The UE 115 may be designed to support ultra-reliable, low-latency or critical functions. Ultra-reliable communication may include private communication or group communication, and may be supported by one or more services (such as push-to-talk, video or data). Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency and ultra-reliable low-latency are used interchangeably herein.

[0062] In some aspects, a UE 115 may be configured to support communication 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 aspects, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some aspects, one or more UEs 115 in such a group may be outside of 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 aspects, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group. In some aspects, the network entity 105 may facilitate scheduling of resources for D2D communications. In some other aspects, D2D communications may be performed between UEs 115 without involving the network entity 105.

[0063] 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 (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW) or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets may be delivered via a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to IP services 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0064] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelength range is about one decimeter to one meter. UHF waves may be blocked or redirected by buildings and environmental features (which may be referred to as clusters), but these waves may be sufficient to penetrate structures so that macro cells provide services to UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than communications using the lower frequencies and longer wavelengths of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0065] The wireless communication system 100 may utilize both licensed RF spectrum bands and unlicensed RF spectrum bands. For example, the wireless communication system 100 may use unlicensed bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band) to employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology. When operating using unlicensed RF spectrum bands, devices such as network entities 105 and UEs 115 may employ carrier sensing for conflict detection and avoidance. In some aspects, operations performed using unlicensed bands may be based on carrier aggregation configurations (e.g., LAA) in conjunction with component carriers operating using licensed bands. Operations performed using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, and the like.

[0066] The network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the network entity 105 or UE 115 may be located in 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 aspects, 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 multiple rows and columns of antenna ports that the network entity 105 can use to support beamforming for communications 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, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0067] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a sender device or a receiver device (e.g., network entity 105, UE 115) to shape or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the sender device and the receiver device. Beamforming may be achieved by combining signals conveyed via antenna elements of an antenna array so that some signals propagating along a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the sender device or the receiver device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of these antenna elements may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the sender device or the receiver device or relative to some other direction).

[0068] The network node 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network node 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communications with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network node 105 in different directions. For example, the network node 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device (such as the network node 105), or by a receiving device (such as the UE 115)) beam directions for later transmission or reception by the network node 105.

[0069] In some aspects, transmission by a device (e.g., by a network node 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the network node 105 to the UE 115). The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The network node 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent by network node 105 in one or more directions, UE 115 may employ similar techniques to send signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals in a single direction (e.g., to send data to a receiving device).

[0070] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly to communicate through logical channels. The medium access control (MAC) layer may perform priority handling and multiplexing of logical channels to transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of an RRC connection that supports radio bearers of user plane data between the UE 115 and the network node 105 or the core network 130. At the physical layer, transport channels may be mapped to physical channels.

[0071] The UE 115 may configure the uplink shared channel transmission using the precoder indicated by the network node 105 via the TPMI. The UE 115 may scale and split the transmit power for the uplink shared channel based on the TPMI. However, the TPMI may be a high-resolution TPMI (e.g., may indicate coefficients other than 0, 1, -1, j, or -j), and thus such scaling and splitting techniques may not be sufficient or applicable for transmitting the uplink shared channel.

[0072] The described techniques relate to improved techniques, devices and apparatuses that support power scaling and splitting for uplink high-resolution TPMI. The described techniques may enable a UE 115 to scale uplink shared channel transmit power based on a high-resolution TPMI received from a network node 105. For example, the UE 115 may calculate a ratio for one or more antenna ports of the UE 115 based on a coefficient magnitude from the TPMI, and may determine a scaling factor based on a comparison between the ratio and a threshold. The described techniques may also enable the UE 115 to split power for one or more antenna ports of the UE 115 based on the received high-resolution TPMI. For example, the UE 115 may calculate a ratio for each antenna port based on a coefficient magnitude from the TPMI, and may determine how to split power across antenna ports based on a comparison between the ratio and a threshold. By scaling and splitting the power for uplink shared channel transmission, when the UE 115 receives the high-resolution TPMI, the UE 115 may be able to correctly allocate power to the antenna ports for transmission.

[0073] Figure 2 An example of a wireless communication system 200 supporting power scaling and splitting for uplink high-resolution TPMI according to one or more aspects of the present disclosure is illustrated. The wireless communication system 200 may be implemented as shown in FIG. Figure 1Various aspects of the wireless communication system 100 described may be implemented by aspects of the wireless communication system. For example, the wireless communication system 200 may include a network node 205 and a UE 215, which may be examples of the network node 105 and the UE 115 as described herein or any other device. The wireless communication system 200 may support improvements in interference, processing, power consumption, and more efficient use of communication resources, among other things.

[0074] In some wireless communication systems, UE 215 may send a reference signal 210 (e.g., SRS) to a network node 205 (e.g., gNB). Network node 205 may determine a precoder (e.g., wideband precoder) (e.g., W, W2, Wf, etc.). Network node 205 may send a control signal 220 to UE 215 indicating the wideband precoder, SRS resources, or both for uplink data transmission (e.g., uplink transmission 230).

[0075] For codebook-based uplink transmission, UE 215 may use up to 2 resources to transmit non-precoded SRS, and each resource may include or correspond to 1, 2, or 4 ports. The network node 205 may measure the SRS, and may select an SRS resource and a broadband precoder (e.g., W) to be applied to the SRS port within the selected SRS resource. The network node 205 may configure the selected SRS resource, broadband precoder, or both to the UE 215 via a control signal 220 (e.g., the network node 205 may send one or more control signals 220). For example, the network node 205 may configure the selected SRS resource via an SRS resource indicator (SRI), and may configure the broadband precoder via TPMI. For dynamic grants, the network node 205 may configure the SRI and TPMI via a downlink control information (DCI) format (e.g., DCI format 0_1). For a configured grant, the network node 205 may configure the SRI and TPMI via RRC signaling or a DCI message.

[0076] For non-codebook based uplink transmission, the UE 215 may use up to 4 resources to send pre-coded SRS, and each resource may include or correspond to 1 port. The network node 205 may measure the SRS and may select one or more SRS resources based on the measurement. The network node 205 may configure the selected one or more SRS resources to the UE 215 via a control signal 220 (e.g., the network node 205 may send one or more control signals 220). The network node 205 may configure the selected one or more SRS resources via SRI. For dynamic grants, the network node 205 may configure the SRI via a DCI format (e.g., DCI format 0_1). For a configured grant, the network node 205 may configure the SRI via radio resource control (RRC) signaling or a DCI message.

[0077] For the differential structure codebook, the UE 215 or network node 205 may use wideband precoding, which may correspond to using wideband TPMI, and differential amplitude or different amplitudes, phases, or both. The UE 215 or network node 205 may additionally or alternatively use frequency selective precoding, which may correspond to using wideband TPMI, differential amplitude or different amplitudes, phases, or both, and a frequency domain (FD) basis and associated coefficients.

[0078] The DCI message may indicate a precoder (e.g., two levels of indication, via 2-stage DCI or single-stage DCI). At a first level (e.g., baseline), the DCI message may indicate a wideband precoder. At a second level, the DCI message may indicate one or more higher resolution coefficients, FD basis, or both.

[0079] At the first level, the DCI message may indicate, use, or correspond to a wideband TPMI (eg, and may again use DCI format 0_1). The network node 205 may indicate a wideband precoder and rank (eg, WB ), the wideband precoder and rank can be used even if the second DCI may be lost. In some cases, the modulation and coding scheme (MCS) can be combined with the wideband precoder (e.g., W WB ) is associated with.

[0080] At the second level for wideband high-resolution precoding, the second level may correspond to differential power, differential phase, or both, and the MCS may be associated with a wideband precoder (e.g., W). In some cases, the following formula (Formula 1) may apply to W:

[0081]

[0082] In some aspects, the first column p may correspond to a first layer (eg, layer 0), and the second column p may correspond to a second layer (eg, layer 1).

[0083] At the second level for frequency selective precoding, the second level may correspond to differential power, differential phase, FD-based indication, or a combination of these, and the MCS may be associated with a wideband precoder (e.g., W). In some cases, the following formula (Formula 2) may apply to W:

[0084]

[0085] In some cases, W diff It can be defined by the following formula (Equation 3), corresponding to 1 FD basis per port (for example, it can be similar to S-CDD):

[0086]

[0087] In some aspects, a first column of the matrix may correspond to a first layer (eg, layer 0), and a second column of the matrix may correspond to a second layer (eg, layer 1).

[0088] In some cases, W diff It can be defined by the following formula (Formula 4), corresponding to 2 FD bases per port per layer (e.g., a maximum of 2 FD bases):

[0089]

[0090] The following is a formula (Formula 5) that gives the relationship between the SRS port and the uplink shared channel (eg, PUSCH) layer when a wideband precoder (eg, W) is applied:

[0091]

[0092] z may represent the pth selected SRS resource (e.g., in Wherein: p may represent an SRS port of the selected resource or resources across the selected SRS port, and y may represent various PUSCH layers. For codebook-based uplink transmission, W may represent a wideband pre-decoder that can map each layer to a PUSCH port and can be extracted from a finite set. For non-codebook-based uplink transmission, W may represent a unit matrix.

[0093] The pre-decoder W may be based on the TPMI index. The relationship between the TPMI index and W may be shown in the following table. Tables 1-7 show pre-coding matrices for corresponding TPMI indexes, and each table may be applicable to various combinations of the number of layers of uplink shared channel transmissions, the number of antenna ports used for such transmissions, and whether transform pre-coding (e.g., pre-coding based on transform operations such as Fourier transforms) is enabled (e.g., at the UE, at the network node):

[0094]

[0095] Table 1 - Precoding matrix for single layer transmission using two antenna ports W

[0096]

[0097] Table 2 - Precoding for single layer transmission using four antenna ports with transform precoding enabled Matrix W

[0098]

[0099] Table 3 - Precoding for single layer transmission using four antenna ports with transform precoding disabled matrix W

[0100]

[0101] Table 4 - Precoding for dual layer transmission using two antenna ports with transform precoding disabled matrix W

[0102]

[0103]

[0104] Table 5 – Precoding for dual layer transmission using four antenna ports with transform precoding disabled matrix W

[0105]

[0106] Table 6 – Precoding for three-layer transmission using four antenna ports with transform precoding disabled matrix W

[0107]

[0108] Table 7 – Precoding for four-layer transmission using four antenna ports with transform precoding disabled Matrix W

[0109] The UE 215 may use the received TPMI to control the power used for PUSCH transmission. The UE 215 may first calculate the transmit power based on an open-loop or closed-loop power control system. The UE 215 may scale the calculated power by a factor (e.g., a factor s), where s may be defined in the following formula (Formula 6):

[0110]

[0111] For example, if W determined based on the received TPMI is as shown in Formula 7:

[0112]

[0113] As shown in Table 2, the value of s will be 1 / 4 because there is one non-zero antenna port (e.g., 1) and four SRS ports (e.g., 1, 0, 0, 0) per resource. On the other hand, if the TPMI indicates [1 0] for the calculated transmit power of 26 dBm, s will be 1 / 2, and thus the UE 215 can scale the calculated power by 1 / 2. That is, the UE 215 can reduce 26 dBm by 3 dB to generate 23 dBm (e.g., the power corresponding to 23 dBm can be half the power of 26 dBm).

[0114] The formula for s may reduce the calculated power in a conservative manner. For example, UE 215 may report supported power levels (e.g., 23dBm or 26dBm in total), but may not report the actual capabilities of one or more PAs (e.g., 26dBm may be achieved by two 23dBm together). In this way, network node 205 (e.g., network) may not be able to determine whether UE 215 can use a single PA to transmit full power. Additionally, if UE 215 is a non-coherent UE (e.g., can only use a single transmitter or a single transmission (Tx) at a time), it may not be transmitted at full power (e.g., full power relative to the supported power level of UE 215).

[0115] In some aspects, three modes may be utilized to introduce full power transmission, and the UE 215 may be able to report capability information to the network node 205 that indicates which modes are to be supported. For example, if the parameter ul-FullPowerTransmission in the PUSCH-Config is set to fullpower, the UE 215 or the network node 205 may set s=1. This may indicate that each PA of the UE 215 may be able to perform full power transmission, and therefore the UE 215 may not scale power. In some other aspects, if the parameter ul-FullPowerTransmission in the PUSCH-Config is set to fullpowerMode1, the UE 215 or the network node 205 may set s=1 according to Formula 6. Non-coherent UEs, partially coherent UEs, or both may be able to use a full phase pre-decoder (e.g., using full power using TPMI of indication

[11] ) via a transparent small cyclic delay diversity (S-CDD) implementation, while the actual pre-decoder may correspond to e(1 (j*θ(k)))). In some other aspects, if the parameter ul-FullPowerTransmission in PUSCH-Config is set to fullpowerMode2, the UE 215 or the network node 205 may set s=1 for some TPMIs (eg, this may depend on UE capabilities) and set s=1 for the remaining TPMIs according to Formula 6. Additionally, the UE 215 may split the transmit power equally across the antenna ports that transmit with non-zero power (eg, after scaling the transmit power by s).

[0116] However, UE 215 may receive (e.g., via control signal 220) a TPMI that may be a high-resolution TPMI. The TPMI may be a pre-decoder that includes one or more amplitudes, one or more phases, or both. In such cases, the high-resolution TPMI may include coefficients that may produce arbitrary amplitudes or powers applied to the antenna ports. For example, UE 215 may receive a TPMI whose coefficient amplitudes are [1, 0.5, 0.5, 0.25], which may include fractional values ​​(e.g., 0.5). Thus, UE 215 may determine power scaling factors and power splits for the high-resolution TPMI while taking into account the PA capabilities of the antenna ports of UE 215.

[0117] For example, UE 215 may correspond to power class 26dBm and may include 4 Txs, each Tx having a fully rated PA (e.g., fully rated with respect to power class 26dBm). Thus, UE 215 may be able to support any power split configuration across the 4 Txs and may be able to support some or all high resolution TPMIs (e.g., TPMI codewords).

[0118] In some other aspects, the UE 215 may correspond to a power level of 26dBm and may include 4 Tx and 4 PAs, each PA corresponding to 23dBm. If the actual transmit power (e.g., as calculated by closed-loop or open-loop power control or by any other method) is 26dBm, each PA may be able to operate at a maximum of 50% of the total power (e.g., the actual transmit power) (e.g., because 23dBm may correspond to a power that is half the power of 26dBm). This may mean that the energy of the coefficients (e.g., 1, 0.5, 0.25, or any other value) applied to each antenna port may not exceed 0.5 (e.g., corresponding to 50%) of the total energy of the coefficients applied collectively to the antenna port (e.g., collectively to all antenna ports). For example, a TPMI corresponding to a coefficient magnitude of [1, 0.5, 0.5, 0.25] may be valid when any single coefficient (e.g., 1, 0.5, or 0.25) does not exceed 0.5 (e.g., 50%) of the sum of the coefficients. However, when , [1, 0.25, 0.25, 0.25] may be invalid. That is, coefficient 1 constitutes about 57% of the sum of the coefficients.

[0119] In some other aspects, if the actual transmit power of UE 215 is 23dBm instead of 26dBm, and each PA may correspond to 23dBm respectively, UE 215 may be able to support any power split configuration across 4 Txs and may be able to support some or all high-resolution TPMIs (e.g., TPMI codewords).

[0120] In some other aspects, the UE may consider the actual transmit power, for example, if the UE power class is 26 dBm and each PA can handle 23 dBm, but the actual transmit power of UE 215 is 24.5 dBm, each PA may be able to operate at a maximum of about 70% of the total power (e.g., 23 dBm may correspond to a power value that is about 70% of the power value of 24.5 dBm). This may mean that the energy corresponding to the coefficient applied to each antenna port may not exceed about 0.7 of the total energy of the coefficients applied collectively to the antenna port (e.g., collectively to all antenna ports). For example, a TPMI corresponding to coefficient magnitudes [1, 0.5, 0.5, 0.25] may be valid, and [1, 0.25, 0.25, 0.25] may also be valid because a single coefficient does not exceed about 70% or 0.7 of the sum of the coefficients. Therefore, power scaling and splitting techniques for high-resolution TPMI may be considered to reduce the PUSCH power or adapt the power split ratio to meet the PUSCH power (e.g., so that the PA is not allocated too much power).

[0121] The UE 215 may scale and split the power 225 for uplink transmission 230. To scale the transmit power for uplink transmission 230 (e.g., PUSCH), the UE 215 may scale the transmit power for uplink transmission 230 based on the received (e.g., received via control signal 220) high resolution TPMI. For example, the UE 215 may calculate a ratio for each antenna port based on the coefficient magnitude from the TPMI, and may determine the scaling factor based on a comparison between the ratio and a threshold. To appropriately split the power for each antenna port, the UE 215 may split the power for each antenna port based on the received high resolution TPMI. For example, the UE 215 may calculate a ratio for each antenna port based on the coefficient magnitude from the TPMI, and may determine how to split the power across the antenna ports based on a comparison between the ratio and a threshold. By scaling and splitting the power 225 for uplink transmission 230 in any of these ways, when the high resolution TPMI is received, the UE 215 may be able to correctly allocate power to the antenna ports for transmission.

[0122] Figure 3A An example of a first codebook scheme 301 supporting power scaling and splitting for uplink high-resolution TPMI according to one or more aspects of the present disclosure is illustrated. The first codebook scheme 301 may be implemented as shown in FIG. Figure 1 and Figure 2 Aspects of the described wireless communication system 100, the wireless communication system 200, or both may be implemented thereby.

[0123] In some wireless communication systems, the UE or network node may use a codebook-based (CB) or non-codebook-based (NCB) scheme for uplink transmission. Some NCB schemes for uplink transmission may use singular value decomposition (SVD) of the channel and may use full channel reciprocity. Due to the low-resolution quantization of the SVD pre-decoder, some CB schemes for uplink transmission may not perform as well as NCB.

[0124] The first candidate codebook scheme may be exemplified by the first codebook scheme 301. The wideband pre-decoder with high-resolution TPMI may be represented in the following formula (Formula 8):

[0125]

[0126] In such cases, c i,l The network node may calculate the SVD of the channel estimate (e.g., instead of selecting a precoder from a table). The network node may use the wideband subband 310 of subband H 305, use SVD (H WB H WB H ) to calculate the wideband SVD (eg, the wideband subband 310 may correspond to six subbands of H, i.e., H WB =[H0, H1, H2, H3, H4, H5]) to obtain singular vectors 315 of the wideband matrix (e.g., singular vectors 315 may correspond to V0, V1, V2, V3 or more). Each column of singular vectors 315 may correspond to a layer index (e.g., 0, 1, 2, 3), and each row of singular vectors 315 may correspond to an SRS port index (e.g., 0, 1, 2, 3). The network node may quantize each element (e.g., corresponding to each layer) of the singular vectors 315 (e.g., V0, V1, V2, V3) to a pre-decoder 320 (e.g., corresponding to W0, W1, W2, W3). Each column of pre-decoders 320 may correspond to a layer index (e.g., 0, 1, 2, 3), and each row of pre-decoders 320 may correspond to an SRS port index (e.g., 0, 1, 2, 3).

[0127] Figure 3BAn example of a second codebook scheme 302 supporting power scaling and splitting for uplink high-resolution TPMI according to various aspects of the present disclosure is illustrated. The second codebook scheme 302 may be implemented as shown in FIG. Figure 1 and Figure 2 Aspects of the described wireless communication system 100, the wireless communication system 200, or both may be implemented thereby.

[0128] The second candidate codebook scheme may be exemplified by the second codebook scheme 302. The precoder for high resolution TPMI with frequency selective precoding may be represented by the following formula (Formula 9):

[0129] W l =W 2,l ×W f,l (9)

[0130] Formula 9 can be of size N tx ×N SB , and W l Can be used for cross-N SB Pre-decoder for layer 1 of uplink subband. 2,l Can be N tx ×M sparse coefficient matrix, and each coefficient may be indicated via quantization (e.g., amplitude / phase quantization). f,l Can be of size M×N SB And may include M FD bases. For frequency selective precoding, the network node may calculate the SVD of one or more subbands in subband H325. The network node may use SVD (H n H n H ) calculates the SVD of one or more subbands H 325 (e.g., may correspond to the six subbands of H, i.e., H0, H1, H2, H3, H4, and H5) to obtain singular vectors 330 (e.g., for a given layer denoted by l, singular vectors 330 may correspond to V 0,l 、V 1,l 、V 2,l 、V 3,l 、V 4,l 、V 5,l Each row of singular vectors 315 may correspond to an SRS port index (eg, 0, 1, 2, 3). The network node may select a singular vector 330 (eg, V 0,l 、V 1,l 、V 2,l 、V 3,l 、V 4,l 、V 5,l ) to compress and quantize each element of the pre-decoder. After compression and quantization, the network node can calculate the pre-decoder 335 (e.g., W 2,l) and pre-decoder 340 (e.g., W f,l ) (e.g., precoder 340 may include a factor in frequency domain compression or correspond to frequency domain compression). Each column precoder 335 may correspond to an FD base index (e.g., 0, 1, 2). Each column precoder 340 may correspond to a subband index (e.g., 0, 1, 2, 3, 4, 5), and each row precoder 340 may correspond to a vector (e.g., any one of f0, f1, f2, f3). Precoders 335 and precoders 340 multiplied together may produce precoder W for layer 1 l , as shown in Formula 9.

[0131] For frequency selective precoding, uplink subband precoding as a linear combination of FD bases can be considered. The uplink precoder of layer l∈{0,…,v-1} across N3 FD units can be expressed by the following formula (Formula 10):

[0132]

[0133] The size of 1×N3 can be the mth FD basis applied to SRS port i of layer l, and c 0,m,l Can be with base Each port may correspond to an FD unit, as shown in the following table, where each row may correspond to port 0, port 1, port 2, and port 3, and each column may correspond to FD unit 0, FD unit 1, ..., FD unit N3-1:

[0134]

[0135]

[0136] Table 8 – Frequency selective pre-decoding, FD units and ports

[0137] Figure 4 An example of a process flow 400 for supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is illustrated. The process flow 400 may be implemented as shown in FIG. Figure 1 and Figure 2 The process flow 400 may include aspects of or be implemented by the wireless communication system 100, the wireless communication system 200, or a combination thereof described herein. In some aspects, the process flow 400 may include example operations associated with a network node 405 and a UE 415, which may be reference Figure 1 and Figure 2In the following description of process flow 400, operations between network node 405 and UE 415 may be performed in an order different from the example order shown, or operations performed by network node 405 and UE 415 may be performed in a different order or at a different time. Some operations may also be omitted from process flow 400, and other operations may be added to process flow 400.

[0138] At 420, UE 415 may send an indication threshold (eg, γ i,thr In some aspects, the UE 415 may send a capability message for each of the one or more antenna ports of the UE 415. That is, the capability message indicating the threshold (e.g., amplitude or power threshold) may be a per-port report for the total number of ports (e.g., γ i,N,thr ). For the 4-port case, the UE 415 may transmit using each port from one Tx. For the 2-port case, the UE 415 may formulate the ports using >1 Tx, resulting in different thresholds (e.g., amplitude / power thresholds) for the 2-port case compared to the 4-port case. For example, for the 4-port case, the UE 415 may report a threshold for each port equal to 0.5. For the 2-port case, the UE 415 may report a threshold for the first port (e.g., port 0) as 1, while the UE 415 may report a threshold for the second port (e.g., port 1) as 0.5. In some cases, the threshold (e.g., amplitude / power threshold) may be dynamically updated by the uplink MAC control element (MAC-CE). In some cases, the threshold may be port-common or port-specific.

[0139] At 425, UE 415 may receive control signaling from network node 405 including a TPMI (e.g., a high-resolution TPMI), which may indicate a precoder to be applied by UE 415 when transmitting an uplink shared channel. The TPMI may include or indicate one or more coefficients corresponding to one or more amplitudes (e.g., [1, 0.5, 0.5, 0.25] may be an example of coefficients for the TPMI).

[0140] At 430, UE 415 may calculate an initial Tx power (eg, PUSCH transmit power) for transmitting an uplink shared channel. For example, UE 415 may calculate the power according to an open-loop or closed-loop power control system or process.

[0141] At 435, the UE 415 may modify the initial transmit power to determine a modified transmit power, wherein the modification of the initial transmit power may be based on one or more magnitudes of one or more coefficients associated with the TPMI. Such modification may include one or more steps, processes, features, etc. as described with reference to 435-a to 435-c.

[0142] At 435-a, the UE 415 may determine a power scaling factor (e.g., a power scaling factor s) based on a ratio of at least one of the one or more amplitudes (e.g., coefficients included in or indicated by the received high-resolution TPMI) divided by the total number of the one or more amplitudes and based on a comparison of the ratio with a threshold. That is, s may depend on a ratio of the amplitude of the coefficients on each antenna port (e.g., in the case of frequency selective precoding, all layers and all precoders are aggregated across frequency) to the total coefficient amplitude (e.g., the sum of the coefficient amplitudes) on the antenna port (e.g., all antenna ports) (e.g., aggregate all layers). In some aspects, if the ratio is less than or equal to the threshold, the UE 415 may assign a first value to the power scaling factor, or if the ratio is greater than or equal to the threshold, the UE may assign a second value to the power scaling factor. For example, if the ratio is less than or equal to the threshold, the UE 415 may set s equal to a first value (e.g., 1), otherwise (e.g., if the ratio of at least one port is greater than its corresponding ratio), the UE 415 may set s equal to a second value. That is, UE 415 may determine the corresponding ratio for antenna port i as If all γ i ≤γ i,thr , Then s=1; otherwise, s can be determined based on the minimum threshold, where the ratio is greater than the threshold. in In some aspects, if the UE 415 transmits an uplink shared channel (eg, PUSCH) at less than the maximum power, then γ i,thr can be interpreted as the highest power ratio for antenna port i.

[0143] In some aspects, if more than one port exceeds the corresponding threshold, the second value may be based on the minimum ratio of the ratio determined among all ports exceeding the corresponding threshold to the corresponding threshold. In this case, in The ratio determined can be γ i , and the ratio of the determined ratio to the corresponding threshold is And the smallest Can be used as scaled power.

[0144] At 435 - b , the UE 415 may scale the initial transmit power by a power scaling factor based on one or more magnitudes of one or more coefficients associated with the TPMI to determine a scaled transmit power.

[0145] For example, a UE 415 with a power level of 26 dBm may include 4 Txs with four PAs, each corresponding to 23 dBm. The UE 415 may report {0.5, 0.5, 0.5, 0.5} as the threshold for each antenna port of the 4 Txs (e.g., 23 dBm may correspond to a power value that is half the power value of 26 dBm). If the network node 405 sends control signaling at 425 indicating the TPMI as shown in Formula 11:

[0146]

[0147] As shown in Formula 12:

[0148]

[0149] Then UE 415 can calculate as shown in Formula 13:

[0150]

[0151] Calculated as each ratio corresponding to each antenna port. i ) is compared with the threshold 0.5, and it can be determined that the scaling factor s is equal to 1, because for any i, γ i <0.5. UE 415 may scale the transmit power by 1 (eg, the value of s).

[0152] In some other aspects, if the network node 405 sends control signaling at 425 indicating the TPMI as shown in Equation 14:

[0153]

[0154] As shown in Formula 15:

[0155]

[0156] Then UE 415 can be as shown in Formula 16:

[0157]

[0158] Calculated as each ratio corresponding to each antenna port. i ) is compared with a threshold of 0.5 and the scaling factor can be determined because UE 415 may use 7 / 8 (eg, the value of s)

[0159] Scale transmit power.

[0160] In some aspects, the UE 415 may additionally determine a power scaling factor based on the initial transmit power (e.g., the PUSCH transmit power) and one or more parameters included in the power headroom report (e.g., the PUSCH transmit power may be based on the parameter P C,max In some aspects, the power headroom report including at least one of the one or more parameters is a per-antenna port power headroom report for one or more antenna ports. In some aspects, the threshold may be a scaled threshold.

[0161] The power scaling factor s may depend on the ratio of the magnitude of the coefficients on each antenna port (e.g., in the case of frequency selective precoding, aggregating all layers and all precoders across frequency) to the total coefficient magnitude (e.g., the sum of coefficient magnitudes) on the antenna port (e.g., all antenna ports) (e.g., aggregating all layers), which is compared to a scaled threshold. If the ratio is less than or equal to the scaled threshold, the UE 415 may set s equal to a first value (e.g., 1), otherwise (e.g., if the ratio of at least one port is greater than its corresponding ratio), the UE 415 may set s equal to a second value. That is, the UE 415 may determine the corresponding ratio for antenna port i as If all γ i ≤γ i,thr , Then s=1; otherwise, s can be determined based on the minimum threshold, where the ratio is greater than the threshold. in in And P cmax,f,c can be the configured maximum power (e.g., on carrier f serving cell c), P PUSCH,b,f,c can be the calculated PUSCH power and P PUSCH,b,f,c =max(0,P cmax,f,c -PH type1,b,f,c ), where PH type1,b,f,c It can be the power headroom on bandwidth portion b of carrier f serving cell c.

[0162] For example, a UE 415 with a power level of 26 dBm may include 4 Txs with four PAs, each PA corresponding to 23 dBm. The UE 415 may report {0.5, 0.5, 0.5, 0.5} as the threshold for each antenna port of the 4 Txs (e.g., 23 dBm may correspond to a power value that is half of the power value of 26 dBm). Based on uplink power control (e.g., open loop, closed loop), the UE 415 may calculate the actual uplink transmission (e.g., PUSCH) power of 24.5 dBm, while P C,max =26dBm. If the network node 405 sends control signaling at 425 indicating the TPMI as shown in Formula 17:

[0163]

[0164] As shown in formula 18:

[0165]

[0166] Then UE 415 can be as shown in Formula 19:

[0167]

[0168] Calculated as each ratio corresponding to each antenna port. UE 415 may i is compared with an adjusted (e.g., scaled) threshold. That is, And UE 415 may determine the scaling factor s=1 because

[0169] In some aspects, the threshold may be port specific. In some aspects, the threshold may be common to one or more antenna ports.

[0170] In some cases, P C,max The power headroom report and / or power headroom may be per uplink transmission (eg, PUSCH) port or per Tx, rather than per P C,max For example, if the power headroom is reported per PUSCH port or per Tx, the threshold can be defined as In some other aspects, if P C,max For each PUSCH port or each Tx, the threshold can be defined as In some other aspects, if the power headroom and P C,max If both are per PUSCH port or per Tx, the threshold can be defined as

[0171] Additionally or alternatively, the UE 415 may scale the initial transmit power by a power scaling factor to determine the scaled transmit power. In some aspects, the UE 415 may scale the initial transmit power by a power scaling factor defined as the number of non-zero antenna ports divided by the number of SRS antenna ports. For example, the UE 415 may scale the initial transmit power by s as mentioned in Formula 6.

[0172] At 435-c, UE 415 may split the scaled transmit power across one or more antenna ports. In some aspects, UE 415-d may split the scaled transmit power based on a ratio. For example, after scaling, UE 415 may split the scaled transmit power based on a ratio γ i To split the power across antenna ports. For example, the power allocated to antenna i of layer v can be shared based on the coefficient magnitude c i,v ratio to the total coefficient magnitude (e.g., based on the ratio ).

[0173] For example, if UE 415 will be as shown in Formula 20:

[0174]

[0175] Calculated as each ratio corresponding to each antenna port, the UE 415 may calculate the ratio based on γ of 0.4, 0.2, 0.2, and 0.2, respectively. i to allocate uplink shared channel power (eg, PUSCH power) across antenna ports (eg, 0, 1, 2, and 3).

[0176] In some other aspects, if UE 415 will be as shown in Formula 21:

[0177]

[0178] Calculated as each ratio corresponding to each antenna port, the UE 415 can be based on γ of 4 / 7, 1 / 7, 1 / 7 and 1 / 7 respectively. i to allocate uplink shared channel power (eg, PUSCH power) across antenna ports (eg, 0, 1, 2, and 3).

[0179] In addition, UE 415 may be based on |c i,0 | 2 With |c i,1 | 2 The allocated uplink shared channel power (e.g., PUSCH power) is distributed to each antenna across one or more layers according to the ratio between the two.

[0180] Additionally or alternatively, the UE 415 may split the scaled transmit power across the one or more antenna ports based on one or more magnitudes of one or more coefficients associated with the TPMI (e.g., high-resolution TPMI). In some aspects, the UE 415 may calculate one or more power ratios corresponding to each of the one or more antenna ports based on one or more magnitudes of the one or more coefficients associated with the TPMI. That is, the UE 415 may determine the ratio for antenna port i as (For example, if configured for frequency selective precoding, the UE 415 may also aggregate all precoders across frequencies).

[0181] The UE 415 may compare each of the one or more power ratios with a threshold value, wherein a first portion of the one or more antenna ports corresponding to a power ratio exceeding the threshold value includes a first antenna port set, and a second portion of the one or more antenna ports corresponding to a power ratio not exceeding the threshold value includes a second antenna port set. The UE 415 may set the corresponding power ratio for the first antenna port set to be equal to the threshold value based on the power ratio exceeding the threshold value. The UE 415 may allocate the remaining power to the second antenna port set based on the one or more power ratios. The UE 415 may repeat the setting and allocation until one or more power ratios corresponding to each of the one or more antenna ports are less than or equal to the threshold value.

[0182] That is, if the ratio is greater than the threshold, then the power ratio is given by the threshold. i ≥γ i,thr , UE 415 may determine The remaining power (i.e. ) can be assigned to i <γ i,thr other ports that are proportional to the power ratio obtained according to the calculated TPMI, and the UE 415 may determine UE 415 may repeat these steps until all

[0183] In some cases, the threshold γ i,thr can be port-common or port-specific and can be signaled by the UE as a capability (e.g., at 420). If an uplink transmission (e.g., PUSCH) is transmitted at maximum power (additionally or alternatively, at less than maximum power), the threshold γ i,thrCan be interpreted as the highest power ratio for antenna port i. In addition, for each of the one or more antenna ports, one or more power ratios across one or more transmission layers can be based on the amplitude of the one or more transmission layers. That is, for each antenna port of UE 415, one or more power split ratios across each layer can be based on one or more amplitudes of the corresponding layer.

[0184] In some aspects, the splitting may include the UE 415 splitting the scaled transmit power (e.g., PUSCH power) based additionally on the initial transmit power and one or more parameters included in the power headroom report. (For example, the scaled transmit power (e.g., PUSCH power) may be split based on the parameters P C,max The PUSCH transmit power may be calculated based on the power headroom parameters in the power headroom report. For example, the UE 415 may split the scaled transmit power across one or more antenna ports based on one or more magnitudes of one or more coefficients associated with the TPMI (e.g., high-resolution TPMI). In some aspects, the UE 415 may calculate one or more power ratios corresponding to each of the one or more antenna ports based on one or more magnitudes of one or more coefficients associated with the TPMI. That is, the UE 415 may determine the ratio for antenna port i as (For example, if configured for frequency selective precoding, the UE 415 may also aggregate all precoders across frequencies).

[0185] UE 415 may compare each of the one or more power ratios to a threshold. That is, if the ratio is greater than the threshold, the power ratio may be given by the threshold. UE 415 may determine In some cases, Where P cmax,f,c It can be the configured maximum power (on carrier f serving cell c), P PUSCH,b,f,c may be the calculated uplink transmit (eg, PUSCH) power, and P PUSCH,b,f,c =max(0,P cmax,f,c -PH type1,b,f,c ), where PH type1,b,f,c It can be the power headroom on bandwidth portion b of carrier f serving cell c. The remaining power (i.e., Can be assigned to other ports that may be proportional to the power ratio obtained from the calculated TPMI, and the UE 415 may determine UE 415 may repeat these steps until all

[0186] For example, a UE 415 with a power level of 26 dBm may include 4 Txs with four PAs, each PA corresponding to 23 dBm. The UE 415 may report {0.5, 0.5, 0.5, 0.5} as the threshold for each antenna port of the 4 Txs (e.g., 23 dBm may correspond to a power value that is half of the power value of 26 dBm). Based on uplink power control (e.g., open loop, closed loop), the UE 415 may calculate the actual uplink transmission (e.g., PUSCH) power of 24.5 dBm, while P C,max =26dBm. UE 415 may determine that the power scaling factor s=1. If network node 405 sends control signaling at 425 indicating the TPMI as shown in equation 22:

[0187]

[0188] As shown in Formula 23:

[0189]

[0190] Then UE 415 can calculate as shown in Formula 24:

[0191]

[0192] Calculated as each ratio corresponding to each antenna port. UE 415 may i is compared with an adjusted (e.g., scaled) threshold. That is, UE 415 may determine the power split ratio γ0=0.5, and when When the remaining power can be P PUSCH,线性 =1-0.5. Therefore, UE 415 can calculate the value of γ for each i based on i Uplink shared channel power (eg, PUSCH power) is allocated (eg, split) across antenna ports 0, 1, 2, and 3 as 1 / 2, 1 / 6, 1 / 6, and 1 / 6, respectively.

[0193] In addition, UE 415 may be based on |c i,0 | 2 With |c i,1 | 2 The allocated uplink shared channel power (e.g., PUSCH power) is distributed to each antenna across one or more layers according to the ratio between the two.

[0194] In some cases, the threshold γ i,thrcan be port-common or port-specific and can be signaled by the UE as a capability (e.g., at 420). If an uplink transmission (e.g., PUSCH) is transmitted at maximum power (additionally or alternatively, at less than maximum power), the threshold γ i,thr can be interpreted as the highest ratio for antenna port i. In addition, for each of the one or more antenna ports, one or more power ratios across one or more transmission layers can be based on the amplitude of the one or more transmission layers. That is, for each antenna port of the UE 415, one or more power split ratios across the layers can be based on one or more amplitudes of the corresponding layer.

[0195] In some aspects, the power headroom report including at least one of the one or more parameters may be a per antenna port power headroom report for one or more antenna ports.

[0196] For frequency selective precoding, in some aspects, a UE 415 with a power level of 26 dBm may include 4 Txs with four PAs, each PA corresponding to 23 dBm. The UE 415 may report {0.5, 0.5, 0.5, 0.5} as the threshold for each antenna port of the 4 Txs (e.g., 23 dBm may correspond to a power value that is half of the power value of 26 dBm). Based on uplink power control (e.g., open loop, closed loop), the UE 415 may calculate an actual uplink transmit (e.g., PUSCH) power of 24.5 dBm, while P C,max =26dBm. UE 415 may determine that power scaling factor s=1. If network node 405 sends control signaling at 425 indicating TPMI as shown in equation 25:

[0197]

[0198] As shown in Formula 26:

[0199]

[0200] Then UE 415 can calculate as shown in Formula 27:

[0201]

[0202] Calculated as each ratio corresponding to each antenna port. UE 415 may i is compared with an adjusted (e.g., scaled) threshold. That is, UE 415 may determine the power split ratio γ0=0.5, and when When the remaining power can be P PUSCH,线性=1-0.5. Therefore, UE 415 can calculate the value of γ for each i based on i Uplink shared channel power (eg, PUSCH power) is allocated (eg, split) across antenna ports 0, 1, 2, and 3 as 1 / 2, 1 / 6, 1 / 6, and 1 / 6, respectively.

[0203] In addition, UE 415 may be based on |c i,0 | 2 With |c i,1 | 2 The allocated uplink shared channel power (e.g., PUSCH power) is distributed to each antenna across one or more layers according to the ratio between the two.

[0204] For frequency selective precoding, in some other aspects, a UE 415 with a power level of 26 dBm may include 4 Txs with four PAs, each PA corresponding to 23 dBm. The UE 415 may report {0.5, 0.5, 0.5, 0.5} as the threshold for each antenna port of the 4 Txs (e.g., 23 dBm may correspond to a power value that is half of the power value of 26 dBm). Based on uplink power control (e.g., open loop, closed loop), the UE 415 may calculate an actual uplink transmit (e.g., PUSCH) power of 24.5 dBm, while P C,max =26 dBm. UE 415 may determine a power scaling factor s=1. For uplink TPMI with FD compression, if network node 405 (eg, network) configures the TPMI on subband k as follows (Formula 28):

[0205]

[0206] As shown in Formula 29:

[0207]

[0208] where f m(i,v) [k] may be the kth entry of the FD basis to be applied to port i and layer v. Then UE 415 may convert as shown in Formula 30:

[0209]

[0210] Calculated as each ratio corresponding to each antenna port. UE 415 may i is compared with an adjusted (e.g., scaled) threshold. That is, UE 415 may determine the power split ratio γ0=0.5, and when When the remaining power can be P PUSCH,线性=1-0.5. Therefore, UE 415 can calculate the value of γ for each i based on i Uplink shared channel power (eg, PUSCH power) is allocated (eg, split) across antenna ports 0, 1, 2, and 3 as 1 / 2, 1 / 6, 1 / 6, and 1 / 6, respectively.

[0211] In addition, UE 415 may be based on |c i,0 | 2 With |c i,1 | 2 The allocated uplink shared channel power (e.g., PUSCH power) is distributed to each antenna across one or more layers according to the ratio between the two.

[0212] At 440, UE 415 may send an uplink transmission (eg, an uplink shared channel) to network node 405 using one or more antenna ports according to the modified (eg, scaled, split, or both) transmit power.

[0213] By scaling and splitting the power used for uplink transmissions (eg, PUSCH), the UE 415 may be able to correctly allocate power to antenna ports (eg, so as not to over-allocate power to the PA) for transmissions in high-resolution TPMI scenarios.

[0214] Figure 5 A block diagram 500 of a device 505 supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0215] The receiver 510 may provide means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to power scaling and splitting for uplink high resolution TPMI), user data, control information, or any combination thereof. The information may be delivered to other components of the device 505. The receiver 510 may utilize a single antenna or a collection of multiple antennas.

[0216] The transmitter 515 may provide means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to power scaling and splitting for uplink high resolution TPMI), 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 a collection of multiple antennas.

[0217] The communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of power scaling and splitting for uplink high resolution TPMI as described herein. For example, the communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof, or components thereof, may support methods for performing one or more of the functions described herein.

[0218] In some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit system). The hardware may include a processor, a digital signal processor (DSP), a central processing unit (CPU), 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, which is configured to or otherwise supports means for performing the functions described in the present disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0219] 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., as communication management software or firmware). If implemented in code executed by a processor, the functionality 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, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting means for performing the functions described in the present disclosure).

[0220] In some examples, communication manager 520 can be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with receiver 510, transmitter 515, or both. For example, communication manager 520 can receive information from receiver 510, transmit information to transmitter 515, or be integrated with receiver 510, transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0221] According to examples as disclosed herein, the communication manager 520 may support wireless communications at a network node (e.g., a UE). For example, the communication manager 520 may be configured to or otherwise support means for receiving information indicating a predecoder to be applied in an uplink shared channel transmission from a second network node. The communication manager 520 may be configured to or otherwise support means for modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the predecoder. The communication manager 520 may be configured to or otherwise support means for transmitting an uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0222] By including or configuring a communication manager 520 according to the examples described herein, a device 505 (e.g., a processor controlling or otherwise coupled to a receiver 510, a transmitter 515, a communication manager 520, or a combination thereof) may support techniques for reducing processing, reducing power consumption, and more efficiently utilizing communication resources.

[0223] Figure 6 A block diagram 600 of a device 605 supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. The device 605 may be an example of aspects of the device 505 or UE 115 as 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).

[0224] The receiver 610 may provide means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to power scaling and splitting for uplink high resolution TPMI), user data, control information, or any combination thereof. The information may be delivered to other components of the device 605. The receiver 610 may utilize a single antenna or a collection of multiple antennas.

[0225] The transmitter 615 may provide means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to power scaling and splitting for uplink high resolution TPMI), 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 a collection of multiple antennas.

[0226] The device 605 or its various components may be examples of means for performing various aspects of power scaling and splitting for uplink high resolution TPMI as described herein. For example, the communication manager 620 may include a receiving component 625, a modifying component 630, a sending component 635, or any combination thereof. The communication manager 620 may be an example of various aspects of the communication manager 520 as described herein. In some examples, the communication manager 620 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 610, the transmitter 615, or both. For example, the communication manager 620 may receive information from the receiver 610, transmit information to the transmitter 615, or be integrated with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

[0227] According to examples as disclosed herein, the communication manager 620 may support a wireless communication network node (e.g., a UE). The receiving component 625 may be configured to or otherwise support means for receiving information indicating a predecoder to be applied in an uplink shared channel transmission from a second network node. The modifying component 630 may be configured to or otherwise support means for modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the predecoder. The transmitting component 635 may be configured to or otherwise support means for transmitting the uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0228] Figure 7A block diagram 700 of a communication manager 720 supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. The communication manager 720 can be an example of aspects of the communication manager 520, the communication manager 620, or both as described herein. The communication manager 720 or its various components can be examples of means for performing various aspects of power scaling and splitting for uplink high resolution TPMI as described herein. For example, the communication manager 720 can include a receiving component 725, a modifying component 730, a sending component 735, a scaling component 740, a splitting component 745, a power ratio component 750, a setting component 755, an allocating component 760, or any combination thereof. Each of these components can communicate with each other directly or indirectly (e.g., via one or more buses).

[0229] According to examples as disclosed herein, the communication manager 720 may support a wireless communication network node (e.g., a UE). The receiving component 725 may be configured to or otherwise support means for receiving information indicating a predecoder to be applied in an uplink shared channel transmission from a second network node. The modifying component 730 may be configured to or otherwise support means for modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the predecoder. The transmitting component 735 may be configured to or otherwise support means for transmitting the uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0230] In some examples, to support modifying the first transmit power, scaling component 740 can be configured to or otherwise support means for scaling the first transmit power by a power scaling factor to produce a second transmit power, wherein the power scaling factor is based on one or more coefficients associated with a pre-decoder. In some examples, to support modifying the first transmit power, splitting component 745 can be configured to or otherwise support means for splitting the second transmit power across one or more antenna ports.

[0231] In some examples, the power scaling factor is based on a comparison of a ratio to a threshold value. In some examples, the ratio corresponds to one of the one or more coefficients divided by a sum of the one or more coefficients.

[0232] In some examples, the power scaling factor is based on power headroom information corresponding to an amount of available transmit power.

[0233] In some examples, the power headroom information includes respective power headroom information for each respective antenna port of the one or more antenna ports.

[0234] In some examples, if the ratio is less than or equal to a threshold, the power scaling factor is a first value, or if the ratio is greater than or equal to the threshold, the power scaling factor is a second value.

[0235] In some examples, each of the one or more antenna ports corresponds to a respective port-specific threshold.

[0236] In some examples, the threshold corresponds to each antenna port of the one or more antenna ports.

[0237] In some examples, sending component 735 may be configured to or otherwise support means for sending information indicating the threshold to the second network node.

[0238] In some examples, to support splitting the second transmit power across one or more antenna ports, splitting component 745 can be configured as or otherwise support means for splitting the second transmit power based on a ratio.

[0239] In some examples, the transmitting component 735 may be configured to or otherwise support means for transmitting a message indicating a respective threshold for each of one or more antenna ports, wherein the power scaling factor is based on a comparison of a ratio to one or more of the respective thresholds, and wherein the ratio corresponds to one of the one or more coefficients divided by a sum of the one or more coefficients.

[0240] In some examples, to support modifying the first transmit power, scaling component 740 may be configured or otherwise support means for scaling the first transmit power by a power scaling factor to produce a second transmit power. In some examples, to support modifying the first transmit power, splitting component 745 may be configured or otherwise support means for splitting the second transmit power across one or more antenna ports based on one or more coefficients associated with a precoder.

[0241] In some examples, to support splitting the second transmit power, the power ratio component 750 may be configured as or otherwise support a component for determining one or more power ratios corresponding to each of the one or more antenna ports based on one or more coefficients associated with the predecoder, wherein a first portion of the one or more antenna ports corresponding to a power ratio exceeding a threshold includes a first set of antenna ports, and a second portion of the one or more antenna ports corresponding to a power ratio not exceeding the threshold includes a second set of antenna ports.

[0242] In some examples, to support splitting the second transmit power, setting component 755 can be configured to or otherwise support means for setting the respective power ratios for the first set of antenna ports equal to the threshold based on the power ratio exceeding the threshold before being set equal to the threshold. In some examples, to support splitting the second transmit power, allocating component 760 can be configured to or otherwise support means for allocating the second transmit power across the first set of antenna ports and the second set of antenna ports based on one or more power ratios.

[0243] In some examples, to support determining one or more power ratios, power ratio component 750 may be configured as or otherwise support components for determining one or more power ratios, wherein for each of one or more antenna ports, the one or more power ratios across one or more transmit layers are based on amplitudes of the one or more transmit layers.

[0244] In some examples, each of the one or more antenna ports corresponds to a respective port-specific threshold.

[0245] In some examples, the threshold corresponds to each antenna port of the one or more antenna ports.

[0246] In some examples, sending component 735 may be configured to or otherwise support means for sending information indicating the threshold to the second network node.

[0247] In some examples, transmitting component 735 can be configured to or otherwise support means for transmitting a message indicating a respective threshold for each of one or more antenna ports.

[0248] In some examples, to support splitting the second transmit power, splitting component 745 may be configured or otherwise support means for splitting the second transmit power based on the first transmit power and power headroom information corresponding to an amount of available transmit power.

[0249] In some examples, the power headroom information includes respective power headroom information for each respective antenna port of the one or more antenna ports.

[0250] In some examples, to support scaling the first transmit power by a power scaling factor, scaling component 740 may be configured as or otherwise support components for scaling the first transmit power by a power scaling factor defined as the number of non-zero antenna ports divided by the number of sounding reference signal antenna ports.

[0251] Figure 8A diagram 800 of a system including a device 805 supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. The device 805 may be an example of a device 505, a device 605, or a UE 115 as 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 communications, including components for sending and receiving communications, such as a communication manager 820, an input / output (I / O) controller 810, a transceiver 815, an antenna 825, a memory 830, a code 835, and a processor 840. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 845).

[0252] I / O controller 810 can manage input signals and output signals of device 805. I / O controller 810 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 810 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 810 can utilize an operating system such as or another known operating system. Additionally or alternatively, I / O controller 810 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 810 may be implemented as part of a processor (such as processor 840). In some cases, a user may interact with device 805 via I / O controller 810 or via hardware components controlled by I / O controller 810.

[0253] 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 bidirectionally via one or more antennas 825, wired or wireless links, as described herein. For example, the transceiver 815 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 815 may also include a modem for: modulating packets; providing the modulated packets to one or more antennas 825 for transmission; and demodulating packets received from one or more antennas 825. The transceiver 815 or the transceiver 815 and one or more antennas 825 may be examples of transmitters 515, transmitters 615, receivers 510, receivers 610, or any combination thereof or components thereof as described herein.

[0254] The memory 830 may include random access memory (RAM) and 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 various functions described herein. The code 835 may be stored in a non-transitory computer-readable medium (such as system memory or another type of memory). In some cases, the code 835 may not be directly executable by the processor 840, but (e.g., when compiled and executed) may cause the computer to perform the functions described herein. In some cases, the memory 830 may also include a basic I / O system (BIOS), etc., which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0255] The processor 840 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, 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., a memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks that support power scaling and splitting for uplink high-resolution TPMI). For example, the device 805 or a component of the device 805 may include a processor 840 and a memory 830 coupled to the processor 840, and the processor 840 and the memory 830 are configured to perform the various functions described herein.

[0256] According to examples as disclosed herein, the communication manager 820 may support a wireless communication network node (e.g., a UE). For example, the communication manager 820 may be configured to or otherwise support means for receiving information indicating a predecoder to be applied in an uplink shared channel transmission from a second network node. The communication manager 820 may be configured to or otherwise support means for modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the predecoder. The communication manager 820 may be configured to or otherwise support means for transmitting an uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

[0257] By including or configuring a communications manager 820 according to examples as described herein, the device 805 may support techniques for improved communications reliability, reduced latency, an improved user experience associated with reduced processing, reduced power consumption, more efficient utilization of communications resources, improved coordination between devices, extended battery life, and improved utilization of processing power.

[0258] In some examples, the communication manager 820 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating 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 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 are executable by the processor 840 to cause the device 805 to perform various aspects of power scaling and splitting for uplink high-resolution TPMI as described herein, or the processor 840 and the memory 830 may be otherwise configured to perform or support such operations.

[0259] Fig. 9 A flow chart illustrating a method 900 for supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. The operations of the method 900 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 900 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 8 The described functions may be performed by the UE 115. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0260] At 905, the method may include: receiving information from the second network node indicating a pre-decoder to be applied to the uplink shared channel transmission. The operations of 905 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 905 may be performed as described in reference to Figure 7 The receiving component 725 described above performs the above steps.

[0261] At 910, the method may include: modifying a first transmit power to generate a second transmit power, wherein the first transmit power is used for transmission of an uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with a pre-decoder. The operations of 910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 910 may be performed as described in reference to Figure 7 The modification component 730 described is performed.

[0262] At 915, the method may include: transmitting an uplink shared channel to the second network node using one or more antenna ports according to the second transmit power. The operations of 915 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 915 may be performed as described in reference to Figure 7 The sending component 735 described above is executed.

[0263] Fig.10 A flow chart illustrating a method 1000 for supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 8 The described functions may be performed by the UE 115. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0264] At 1005, the method may include: receiving information from the second network node indicating a pre-decoder to be applied to the uplink shared channel transmission. The operations of 1005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed as described in reference to Figure 7 The receiving component 725 described above performs the above steps.

[0265] At 1010, the method may include scaling the first transmit power by a power scaling factor to generate a second transmit power, wherein the power scaling factor is based on one or more coefficients associated with a pre-decoder. The operations of 1010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed as described in reference Figure 7 The scaling component 740 described above performs the above.

[0266] At 1015, the method may include: splitting the second transmit power across one or more antenna ports. The operations of 1015 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1015 may be performed as described in reference Figure 7 The split component 745 described is executed.

[0267] At 1020, the method may include: modifying a first transmit power to generate a second transmit power, wherein the first transmit power is used for transmission of an uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with a pre-decoder. The operations of 1020 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1020 may be performed as described in reference to Figure 7 The modification component 730 described is performed.

[0268] At 1025, the method may include: transmitting an uplink shared channel to the second network node using one or more antenna ports according to the second transmit power. The operations of 1025 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1025 may be performed as described in reference to Figure 7 The sending component 735 described above is executed.

[0269] Fig.11 A flow chart illustrating a method 1100 for supporting power scaling and splitting for uplink high resolution TPMI according to one or more aspects of the present disclosure is shown. The operations of the method 1100 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1100 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 8 The described functions may be performed by the UE 115. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0270] At 1105, the method may include: receiving information from the second network node indicating a pre-decoder to be applied to the uplink shared channel transmission. The operations of 1105 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1105 may be performed as described in reference to Figure 7 The receiving component 725 described above performs the above steps.

[0271] At 1110, the method may include scaling the first transmit power by a power scaling factor to generate a second transmit power. The operations of 1110 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 1110 may be performed as described in reference to Figure 7 The scaling component 740 described above performs the above.

[0272] At 1115, the method may include: splitting the second transmit power across one or more antenna ports based on one or more coefficients associated with the pre-decoder. The operations of 1115 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1115 may be performed as described in reference Figure 7 The split component 745 described is executed.

[0273] At 1120, the method may include: modifying the first transmit power to generate a second transmit power, wherein the first transmit power is used for transmission of an uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with a pre-decoder. The operations of 1120 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1120 may be performed as described in reference to Figure 7The modification component 730 described is performed.

[0274] At 1125, the method may include: transmitting an uplink shared channel to the second network node using one or more antenna ports according to the second transmit power. The operations of 1125 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1125 may be performed as described in reference to Figure 7 The sending component 735 described above is executed.

[0275] The following provides an overview of various aspects of the disclosure:

[0276] Aspect 1: A method for wireless communication at a first network node, the method comprising: receiving information indicating a predecoder to be applied to an uplink shared channel transmission from a second network node; modifying a first transmission power to produce a second transmission power, wherein the first transmission power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmission power based on one or more coefficients associated with the predecoder; and transmitting the uplink shared channel transmission to the second network node using one or more antenna ports based on the second transmission power.

[0277] Aspect 2: A method according to Aspect 1, wherein modifying the first transmit power further includes: scaling the first transmit power according to a power scaling factor to generate the second transmit power, wherein the power scaling factor is based on one or more coefficients associated with the predecoder; and splitting the second transmit power across one or more antenna ports.

[0278] Aspect 3: The method according to aspect 2, wherein the power scaling factor is based on a comparison of a ratio with a threshold, the ratio corresponding to one of the one or more coefficients divided by the sum of the one or more coefficients.

[0279] Aspect 4: The method according to aspect 3, wherein the power scaling factor is based on power headroom information corresponding to an amount of available transmit power.

[0280] Aspect 5: The method according to aspect 4, wherein the power headroom information includes respective power headroom information for each respective antenna port of the one or more antenna ports.

[0281] Aspect 6: A method according to any one of Aspects 3 to 5, wherein if the ratio is less than or equal to the threshold, the power scaling factor is a first value, or if the ratio is greater than or equal to the threshold, the power scaling factor is a second value.

[0282] Aspect 7: The method according to any one of aspects 3 to 6, wherein each of the one or more antenna ports corresponds to a corresponding port-specific threshold.

[0283] Aspect 8: The method according to any one of aspects 3 to 7, wherein the threshold corresponds to each antenna port of the one or more antenna ports.

[0284] Aspect 9: According to the method according to any one of aspects 3 to 8, the method further comprises: sending information indicating the threshold to the second network node.

[0285] Aspect 10: The method according to any one of aspects 3 to 9, wherein splitting the second transmit power across the one or more antenna ports further comprises: splitting the second transmit power based on the ratio.

[0286] Aspect 11: According to any one of Aspects 2 to 10, the method further includes: sending a message indicating a corresponding threshold for each of the one or more antenna ports, wherein the power scaling factor is based on a comparison of a ratio with one or more of the corresponding thresholds, and wherein the ratio corresponds to one of the one or more coefficients divided by the sum of the one or more coefficients.

[0287] Aspect 12: A method according to any one of Aspects 1 to 11, wherein modifying the first transmit power further includes: scaling the first transmit power according to a power scaling factor to produce a second transmit power; and splitting the second transmit power across one or more antenna ports based on one or more coefficients associated with the predecoder.

[0288] Aspect 13: A method according to Aspect 12, wherein splitting the second transmit power further includes: determining one or more power ratios corresponding to each of the one or more antenna ports based on the one or more coefficients associated with the predecoder, wherein a first part of the one or more antenna ports corresponding to a power ratio exceeding a threshold includes a first antenna port set, and a second part of the one or more antenna ports corresponding to a power ratio not exceeding the threshold includes a second antenna port set.

[0289] Aspect 14: A method according to Aspect 13, wherein splitting the second transmit power further includes: setting the corresponding power ratio for the first antenna port set equal to the threshold based on the power ratio exceeding the threshold before being set equal to the threshold; and allocating the second transmit power across the first antenna port set and the second antenna port set based on the one or more power ratios.

[0290] Aspect 15: A method according to any one of Aspects 13 to 14, wherein determining the one or more power ratios further includes: determining the one or more power ratios, wherein for each of the one or more antenna ports, the one or more power ratios across one or more transmission layers are based on the amplitude of the one or more transmission layers.

[0291] Aspect 16: The method according to any one of aspects 13 to 15, wherein each of the one or more antenna ports corresponds to a respective port-specific threshold.

[0292] Aspect 17: The method according to any one of aspects 13 to 16, wherein the threshold corresponds to each antenna port of the one or more antenna ports.

[0293] Aspect 18: The method according to any one of aspects 13 to 17, further comprising: sending information indicating the threshold to the second network node.

[0294] Aspect 19: The method according to any one of aspects 13 to 18, further comprising: sending a message indicating a corresponding threshold for each of the one or more antenna ports.

[0295] Aspect 20: The method according to any one of aspects 12 to 19, wherein splitting the second transmit power further comprises: splitting the second transmit power based on the first transmit power and power headroom information corresponding to the amount of available transmit power.

[0296] Aspect 21: The method according to aspect 20, wherein the power headroom information includes respective power headroom information for each respective antenna port of the one or more antenna ports.

[0297] Aspect 22: A method according to any one of Aspects 12 to 21, wherein scaling the first transmit power according to the power scaling factor further includes: scaling the first transmit power according to the power scaling factor defined as the number of non-zero antenna ports divided by the number of detection reference signal antenna ports.

[0298] Aspect 23: A first network node for wireless communication (e.g., a device for performing wireless communication at a first network node), the first network node comprising a memory; and at least one processor, the at least one processor being coupled to the memory, wherein the at least one processor is configured to cause the device to perform a method according to any one of Aspects 1 to 22.

[0299] Aspect 24: An apparatus for wireless communication at a first network node, the apparatus comprising at least one means for performing the method according to any one of aspects 1 to 22.

[0300] Aspect 25: A non-transitory computer readable medium having stored thereon code for wireless communication, the code, when executed by a first network node, causes the first network node to perform the method according to any one of aspects 1 to 22.

[0301] The above methods describe possible implementations, and the operations and steps may be rearranged or otherwise modified, and other implementations are possible. In addition, aspects from two or more methods may be combined.

[0302] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0303] The information and signals described herein may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0304] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed using a general purpose processor, DSP, ASIC, CPU, 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 an alternative, the 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, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0305] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as one or more instructions or codes of a computer-readable medium, or sent using one or more instructions or codes of a computer-readable medium. Other examples and specific implementations are within the scope of the present disclosure and claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these items. Features that implement the functions may also be physically located at different locations, including being distributed so that the various parts of the functions are implemented at different physical locations.

[0306] Computer-readable medium includes both non-transient computer storage medium and communication medium, and the communication medium includes any medium that promotes computer program to be transferred from one position to another position.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.By way of example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage device, disk storage device or other magnetic storage device, or can be used for carrying or storing desired program code member and can be accessed by general or special-purpose computer or general or special-purpose processor in the form of instruction or data structure Any other non-transient medium.Moreover, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. As used herein, disks and optical disks include CDs, laser disks, optical disks, digital versatile disks (DVDs), floppy disks, and Blu-ray disks. Disks can reproduce data magnetically, and optical disks can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0307] As used herein, the term "or" is an inclusive "or" unless restrictive language is used with respect to the listed alternatives. For example, references to "X is based on A or B" should be interpreted as including within its scope X based on A, X based on B, and X based on A and B. In this regard, references to "X is based on A or B" refer to "at least one of A or B" or "one or more of A or B" because "or" is inclusive. Similarly, references to "X is based on A, B, or C" should be interpreted as including within its scope X based on A, X based on B, X based on C, X based on A and B, X based on A and C, X based on B and C, and X based on A, B, and C. In this regard, references to "X is based on A, B, or C" refer to "at least one of A, B, or C" or "one or more of A, B, or C" because "or" is inclusive. As an example of restrictive language, a reference to "X is based on only one of A or B" should be interpreted to include within its scope X being based on A and X being based on B, but not including X being based on both A and B. Furthermore, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, a condition, a factor, etc.) should be interpreted as "based on at least A" unless specifically stated differently. Additionally, as used herein, the phrase "set" should be understood to include the possibility of a set having one member. That is, the phrase "set" should be understood in the same manner as "one or more" or "at least one."

[0308] The term "determining" encompasses a variety of actions, and thus, "determining" may include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, database or other data structure), ascertaining, and the like. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Additionally, "determining" may include parsing, obtaining, selecting, choosing, establishing, and other such similar actions.

[0309] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label to distinguish between the similar components. If only the first reference label is used in the specification, the description may apply to any of the similar components having the same first reference label, regardless of the second or other subsequent reference labels.

[0310] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The terms "aspect" or "example" used herein mean "used as an aspect, example, instance, or illustration," rather than "preferred" or "having advantages over other aspects." The specific embodiments include specific details for providing an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, structures and devices are shown in block diagram form to avoid obscuring the concepts of the examples.

[0311] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A first network node for wireless communication, the first network node comprising: Memory; and at least one processor coupled to the memory, wherein the at least one processor is configured to: receiving, from the second network node, information indicating a precoder to be applied for uplink shared channel transmissions; modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein to modify the first transmit power, the at least one processor is configured to: modify the first transmit power based on one or more coefficients associated with the predecoder; as well as The uplink shared channel transmission is transmitted to the second network node using one or more antenna ports according to the second transmission power.

2. The first network node according to claim 1, wherein in order to modify the first transmit power, the at least one processor is configured to: scaling the first transmit power by a power scaling factor to produce the second transmit power, wherein the power scaling factor is based on one or more coefficients associated with the pre-decoder; and The second transmit power is split across one or more antenna ports.

3. The first network node according to claim 2, wherein: The power scaling factor is based on a comparison of the ratio to a threshold, and The ratio corresponds to one of the one or more coefficients divided by the sum of the one or more coefficients. 4 . The first network node of claim 3 , wherein the power scaling factor is based on power headroom information corresponding to an amount of available transmit power. 5 . The first network node of claim 4 , wherein the power headroom information comprises respective power headroom information for each respective antenna port of the one or more antenna ports.

6. The first network node of claim 3, wherein if the ratio is less than or equal to the threshold, the power scaling factor is a first value, or if the ratio is greater than or equal to the threshold, the power scaling factor is a second value. 7 . The first network node according to claim 3 , wherein each of the one or more antenna ports corresponds to a respective port-specific threshold.

8. The first network node of claim 3, wherein the threshold corresponds to each antenna port of one or more antenna ports.

9. The first network node of claim 3, wherein the at least one processor is configured to: Information indicating the threshold is sent to the second network node.

10. The first network node of claim 3, wherein to split the second transmit power across the one or more antenna ports, the at least one processor is configured to: The second transmit power is split based on the ratio.

11. The first network node of claim 2, wherein the at least one processor is configured to: Sending a message indicating a corresponding threshold for each of the one or more antenna ports, wherein the power scaling factor is based on a comparison of a ratio to one or more of the corresponding thresholds, and wherein the ratio corresponds to one of the one or more coefficients divided by a sum of the one or more coefficients.

12. The first network node of claim 1 , wherein to modify the first transmit power, the at least one processor is configured to: scaling the first transmit power according to a power scaling factor to generate a second transmit power; and The second transmit power is split across one or more antenna ports based on one or more coefficients associated with the precoder.

13. The first network node according to claim 12, wherein in order to split the second transmit power, the at least one processor is configured to: One or more power ratios corresponding to each of the one or more antenna ports are determined based on the one or more coefficients associated with the predecoder, wherein a first portion of the one or more antenna ports corresponding to power ratios exceeding a threshold includes a first antenna port set, and a second portion of the one or more antenna ports corresponding to power ratios not exceeding the threshold includes a second antenna port set.

14. The first network node according to claim 13, wherein in order to split the second transmit power, the at least one processor is configured to: setting a respective power ratio for the first set of antenna ports equal to the threshold based on the power ratio exceeding the threshold before being set equal to the threshold; and The second transmit power is allocated across the first set of antenna ports and the second set of antenna ports based on the one or more power ratios.

15. The first network node of claim 13, wherein to determine one or more power ratios, the at least one processor is configured to: The one or more power ratios are determined, wherein for each of the one or more antenna ports, the one or more power ratios across one or more transmit layers are based on amplitudes of the one or more transmit layers.

16. The first network node of claim 13, wherein each of the one or more antenna ports corresponds to a respective port-specific threshold.

17. The first network node of claim 13, wherein the threshold corresponds to each antenna port of one or more antenna ports.

18. The first network node of claim 13, wherein the at least one processor is configured to: Information indicating the threshold is sent to the second network node.

19. The first network node of claim 13, wherein the at least one processor is configured to: A message is sent indicating a respective threshold for each of the one or more antenna ports.

20. The first network node of claim 12, wherein to split the second transmit power, the at least one processor is configured to: The second transmit power is split based on the first transmit power and power headroom information corresponding to an amount of available transmit power.

21. The first network node of claim 20, wherein the power headroom information comprises respective power headroom information for each respective antenna port of the one or more antenna ports.

22. The first network node of claim 12, wherein to scale the first transmit power by the power scaling factor, the at least one processor is configured to: The first transmit power is scaled by the power scaling factor defined as the number of non-zero antenna ports divided by the number of sounding reference signal antenna ports.

23. A method for wireless communication at a first network node, the method comprising: receiving, from the second network node, information indicating a precoder to be applied for uplink shared channel transmissions; modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the precoder; and The uplink shared channel transmission is transmitted to the second network node using one or more antenna ports according to the second transmission power.

24. The method of claim 23, wherein modifying the first transmit power further comprises: scaling the first transmit power by a power scaling factor to produce the second transmit power, wherein the power scaling factor is based on one or more coefficients associated with the pre-decoder; as well as The second transmit power is split across one or more antenna ports.

25. The method according to claim 24, further comprising: Sending a message indicating a corresponding threshold for each of the one or more antenna ports, wherein the power scaling factor is based on a comparison of a ratio to one or more of the corresponding thresholds, and wherein the ratio corresponds to one of the one or more coefficients divided by a sum of the one or more coefficients.

26. The method of claim 23, wherein modifying the first transmit power further comprises: Scaling the first transmit power according to a power scaling factor to generate a second transmit power; as well as The second transmit power is split across one or more antenna ports based on one or more coefficients associated with the precoder.

27. The method of claim 26, wherein splitting the second transmit power further comprises: The second transmit power is split based on the first transmit power and power headroom information corresponding to an amount of available transmit power.

28. The method of claim 26, wherein scaling the first transmit power according to the power scaling factor further comprises: The first transmit power is scaled by the power scaling factor defined as the number of non-zero antenna ports divided by the number of sounding reference signal antenna ports.

29. An apparatus for wireless communication at a first network node, the apparatus comprising: means for receiving, from a second network node, information indicating a precoder to be applied for uplink shared channel transmissions; means for modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the precoder; and means for transmitting the uplink shared channel transmission to the second network node using one or more antenna ports according to the second transmit power.

30. A non-transitory computer readable medium having stored thereon code for wireless communication, the code, when executed by a first network node, causing the first network node to: receiving, from the second network node, information indicating a precoder to be applied for uplink shared channel transmissions; modifying a first transmit power to produce a second transmit power, wherein the first transmit power is used for transmission of the uplink shared channel transmission, and wherein the first network node modifies the first transmit power based on one or more coefficients associated with the precoder; and The uplink shared channel transmission is transmitted to the second network node using one or more antenna ports according to the second transmission power.

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