Downlink multiple-input, multiple-output coordination

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control signal indicating a scale factor for a channel state information (CSI) parameter. The scale factor may correspond to a CSI reference signal (CSI-RS) measurement and a second measurement. The UE may receive a CSI-RS, and a value of the CSI parameter may be based on the CSI-RS. The UE may transmit a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor. In some examples, the scale factor may be associated with a downlink shared channel block error rate, a demodulation reference signal measurement, an uplink sounding reference signal, or any combination thereof.

Description

DOWNLINK MULTIPLE-INPUT, MULTIPLE-OUTPUT COORDINATIONCROSS REFERENCES

[0001] The present Application for Patent claims priority to U.S. Patent Application No. 19 / 221,974 by YANG et al., entitled “DOWNLINK MULTIPLE-INPUT, MULTIPLE-OUTPUT COORDINATION”, filed May 29, 2025, which claims the benefit of U.S. Provisional Patent Application No. 63 / 661,670 by YANG et al., entitled “DOWNLINK MULTIPLE-INPUT, MULTIPLE-OUTPUT COORDINATION,” filed June 19, 2024, each of which is assigned to the assignee hereof, and each of which is expressly incorporated herein.FIELD OF TECHNOLOGY

[0002] The following relates to wireless communications, including downlink multiple-input, multiple-output coordination.BACKGROUND

[0003] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE- Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE).SUMMARY

[0004] The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein.

[0005] A method for wireless communications by a user equipment (UE) is described. The method may include receiving a control signal indicating a scale factor for a channel state information (CSI) parameter, the scale factor corresponding to a CSI reference signal (CSI-RS) measurement, receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS, and transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0006] A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the UE to receive a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement, receive a CSI-RS, a value of the CSI parameter being based on the CSI- RS, and transmit a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0007] Another UE for wireless communications is described. The UE may include means for receiving a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement, means for receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS, and means for transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0008] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to receive a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement, receive a CSI-RS, a value of the CSI parameter being based on the CSI-RS, and transmit a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0009] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a downlink shared channel transmission, where the adjusted value of the CSI parameter may be based on a physical downlink shared channel (PDSCH) block error rate (BLER) for the downlink shared channel transmission and the scale factor.

[0010] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a downlink shared channel transmission, where the adjusted value of the CSI parameter may be based on a demodulation reference signal (DMRS) signal-to-noise ratio (SNR) for the downlink shared channel transmission and the scale factor.

[0011] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a downlink shared channel transmission having one or more characteristics associated with an uplink sounding reference signal (SRS), where the adjusted value of the CSI parameter may be based on the uplink SRS and the scale factor.

[0012] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a downlink shared channel transmission, where the adjusted value of the CSI parameter may be based on a spectrum efficiency for the downlink shared channel transmission and the scale factor.

[0013] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a message indicating a capability of the UE to adjust the value of the CSI parameter according to the scale factor, where the control signal may be received based on the capability of the UE.

[0014] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the adjusted value of the CSI parameter may be only based on the CSI-RS based on the scale factor.

[0015] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the control signal indicates a set of multiple scale factors including at least a first scale factor corresponding to the CSI-RS measurement and a second scale factor corresponding to a second metric from an SRS, a PDSCH BLER, a DMRS SNR, a PDSCH spectrum efficiency, or any combination thereof and the first scale factor and the second scale factor indicate a weighting value for the CSI-RS measurement and the second metric.

[0016] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the CSI parameter includes a channel quality indicator or a rank indicator.

[0017] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the control signal indicates a first scale factor for the channel quality indicator and a second scale factor for the rank indicator.

[0018] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a second control signal indicating a second scale factor for the CSI parameter in response to the CSI report.

[0019] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the control signal or the second control signal, or both, may be transmitted via a medium access control element or downlink control information, or both.

[0020] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for adjusting the scale factor for the CSI parameter based on radiofrequency conditions, mobility of the UE, an application Quality of Service (QoS) requirement, or any combination thereof.

[0021] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the scale factor may be associated with an uplink SRS, a PDSCH BLER, a PDSCH DMRS SNR, a PDSCH spectrum efficiency, or any combination thereof.

[0022] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a second control signal indicating a further adjusted CSI parameter in response to the CSI report.

[0023] Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, the drawings, and the claims. Note that the relative dimensions of the following figures may not be drawn to scale.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 shows an example of a wireless communications system that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure.

[0025] FIG. 2 shows an example of a wireless communications system that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure.

[0026] FIG. 3 shows an example of a process flow that supports downlink multipleinput, multiple-output coordination in accordance with one or more aspects of the present disclosure.

[0027] FIGs. 4 and 5 show block diagrams of devices that support downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure.

[0028] FIG. 6 shows a block diagram of a communications manager that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure.

[0029] FIG. 7 shows a diagram of a system including a device that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure.

[0030] FIGs. 8 and 9 show flowcharts illustrating methods that support downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure.DETAILED DESCRIPTION

[0031] A wireless communications system may support different reference signals which a receiver can measure to estimate downlink channel characteristics. For example, a network entity may transmit a channel state information reference signal (CSLRS) to a user equipment (UE), and the UE may perform channel estimation based on measuring the CSLRS. In some examples, the UE may transmit a sounding reference signal (SRS) on an uplink channel. The network entity may measure the SRS to estimate the uplink channel, and the network entity may estimate the uplink channel based on channel reciprocity between the uplink channel and the downlink channel.

[0032] A wireless device, such as the UE or the network entity, may determine channel state information (CSI) parameters, such as a channel quality indicator (CQI), a rank indicator (RI), and a precoding matrix indicator (PMI) based on channel estimation techniques. For example, the network entity may use the SRS to determine a downlink precoding matrix based on channel reciprocity. A UE may measure the CSI-RS to obtain a signal-to-interference plus noise (SINR) measurement of the CSI-RS and determine a CSI parameters based on the SINR measurement. In some examples, the UE may also receive downlink shared channel signaling from a network entity. The UE may indicate to the network entity if a block error rate (BLER) of the downlink shared channel is high, such as by reporting a negative acknowledgment (NACK) for the downlink shared channel signal. In some cases, the UE may reduce some CSI parameters based on the CSI-RS measurement, such as if the SINR measurement of the CSI-RS is low. Additionally, the network entity may reduce or adjust some CSI parameters based on the downlink shared channel feedback or an SRS received from the UE. If both the UE and the network entity independently reduce the CSI parameters, the CSI parameters may be lowered such that channel quality degrades. For example, the RI may be lowered by both the UE and the network entity to a value which does not support MIMO communications.

[0033] A network entity may configure a UE with a scale factor for determining one or more CSI parameters. The scale factor may weigh the determination of the one or more CSI parameters between different measurements or metrics, such as CSI measurements, downlink shared channel measurements, and SRS measurements, among others. For example, if the scale factor is set to zero, the CSI parameters may be based only on CSI-RS measurements (e.g., or CSI interference measurements). If the scale factor is set to one, the CSI parameters may be based on both CSI-RS measurements or CSI interference measurements and downlink shared channel measurements (e.g., BLER). If the scale factor is between zero and one, the CSI parameters are weighted between CSI measurements (e.g., CSI-RS measurements or CSI interference measurements) and downlink shared channel measurements accordingly. The UE may transmit a CSI report including the adjusted CSI parameters, and the network entity may adjust the CSI parameters according to the scaling factor. For example, if the UE already adjusted the CSI parameters according to the downlink shared channel measurements, the network entity may avoid over-adjusting the CSI parameters based on the downlink shared channel measurements. The UE may transmit capability signaling to indicate support for using the scale factor.

[0034] Such implementations of the subject matter described in this disclosure also can be implemented to realize one or more of the following potential advantages. For example, in accordance with supporting the network entity configuring a scale factor for a CSI parameter at the UE, the UE and the network entity may coordinate adjustments to the CSI parameter such that the CSI parameter is not double-adjusted by both the UE and the network entity, preventing the CSI parameter from being over-adjusted to a value which reduces MIMO communications quality or throughput.

[0035] Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to downlink multiple-input, multiple-output coordination.

[0036] FIG. 1 shows an example of a wireless communications system 100 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The wireless communications system 100 may include one or more devices, such as one or more network devices (e.g., networkentities 105), one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE- Advanced (LTE- A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0037] The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via communication link(s) 125 (e.g., a radio frequency (RF) access link). For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish the communication link(s) 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs).

[0038] The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices in the wireless communications system 100 (e.g., other wireless communication devices, including UEs 115 or network entities 105), as shown in FIG. 1.

[0039] As described herein, a node of the wireless communications 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, a node may be a UE 115. As another example, a node may be a network entity 105. As another example, a first node may beconfigured 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 yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.

[0040] In some examples, network entities 105 may communicate with a core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via backhaul communication link(s) 120 (e.g., in accordance with an SI, N2, N3, or other interface protocol). In some examples, network entities 105 may communicate with one another via backhaul communication link(s) 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via the core network 130). In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol), or any combination thereof. The backhaul communication link(s) 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) or one or more wireless links (e.g., a radio link, a wireless optical link), among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.

[0041] One or more of the network entities 105 or network equipment described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or giga-NodeB (either of which may be referred to as a gNB), a 5GNB, a next-generation eNB (ng-eNB), a HomeNodeB, a Home eNodeB, or other suitable terminology). In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within one network entity (e.g., a network entity 105 or a single RAN node, such as a base station 140).

[0042] In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture), which may be configured to utilize a protocol stack that is physically or logically distributed among multiple network entities (e.g., network entities 105), such as an integrated access and 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, a network entity 105 may include one or more of a central unit (CU), such as a CU 160, a distributed unit (DU), such as a DU 165, a radio unit (RU), such as an RU 170, a RAN Intelligent Controller (RIC), such as an 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) system, such as an SMO system 180, or any combination thereof. An 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 transmission reception point (TRP). One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more of the network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU), a virtual DU (VDU), a virtual RU (VRU)).

[0043] The split of functionality between a CU 160, a DU 165, and an 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, or any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper 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 (e.g., one or more CUs) may be connected to a DU 165 (e.g., one or more DUs) or an RU 170 (e.g., one or more RUs), or some combination thereof, and the DUs 165, RUs 170, or both may host lower protocol layers, such as layer 1 (LI) (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 a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or multiple different RUs, such as an RU 170). In some cases, a functional split between a CU 160 and a DU 165 or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170). A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to a DU 165 via a midhaul communication link 162 (e.g., Fl, Fl-c, Fl-u), and a DU 165 may be connected to an RU 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface). In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities (e.g., one or more of the network entities 105) that are in communication via such communication links.

[0044] In some wireless communications systems (e.g., the wireless communications system 100), infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130). In some cases, in an IAB network, one or more of the network entities 105 (e.g., network entities 105 or IAB node(s) 104) may be partially controlled by each other. The IAB node(s) 104 may be referred to as a donor entity or an IAB donor. A DU 165 or an RU 170 may be partially controlled by a CU 160 associated with a network entity 105 or base station140 (such as a donor network entity or a donor base station). The one or more donor entities (e.g., IAB donors) may be in communication with one or more additional devices (e.g., IAB node(s) 104) via supported access and backhaul links (e.g., backhaul communication link(s) 120). IAB node(s) 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by one or more DUs (e.g., DUs 165) of a coupled IAB donor. An IAB-MT may be equipped with an independent set of antennas for relay of communications with UEs 115 or may share the same antennas (e.g., of an RU 170) of IAB node(s) 104 used for access via the DU 165 of the IAB node(s) 104 (e.g., referred to as virtual IAB-MT (vIAB-MT)). In some examples, the IAB node(s) 104 may include one or more DUs (e.g., DUs 165) that support communication links with additional entities (e.g., IAB node(s) 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream). In such cases, one or more components of the disaggregated RAN architecture (e.g., the IAB node(s) 104 or components of the IAB node(s) 104) may be configured to operate according to the techniques described herein.

[0045] For instance, an access network (AN) or RAN may include communications between access nodes (e.g., an IAB donor), IAB node(s) 104, and one or more UEs 115. The IAB donor may facilitate connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, an IAB donor may refer to a RAN node with a wired or wireless connection to the core network 130. The IAB donor may include one or more of a CU 160, a DU 165, and an RU 170, in which case the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB donor and IAB node(s) 104 may communicate via an Fl interface according to a protocol that defines signaling messages (e.g., an Fl AP protocol). Additionally, or alternatively, the CU 160 may communicate with the core network 130 via an interface, which may be an example of a portion of a backhaul link, and may communicate with other CUs (e.g., including a CU 160 associated with an alternative IAB donor) via an Xn-C interface, which may be an example of another portion of a backhaul link.

[0046] IAB node(s) 104 may refer to RAN nodes that provide IAB functionality (e.g., access for UEs 115, wireless self-backhauling capabilities). A DU 165 may act as a distributed scheduling node towards child nodes associated with the IAB node(s) 104,and the IAB-MT may act as a scheduled node towards parent nodes associated with IAB node(s) 104. That is, an IAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an IAB donor may relay transmissions for UEs through other IAB node(s) 104). Additionally, or alternatively, IAB node(s) 104 may also be referred to as parent nodes or child nodes to other IAB node(s) 104, depending on the relay chain or configuration of the AN. The IAB-MT entity of IAB node(s) 104 may provide a Uu interface for a child IAB node (e.g., the IAB node(s) 104) to receive signaling from a parent IAB node (e.g., the IAB node(s) 104), and a DU interface (e.g., a DU 165) may provide a Uu interface for a parent IAB node to signal to a child IAB node or UE 115.

[0047] For example, IAB node(s) 104 may be referred to as parent nodes that support communications for child IAB nodes, or may be referred to as child IAB nodes associated with IAB donors, or both. An IAB donor may include a CU 160 with a wired or wireless connection (e.g., backhaul communication link(s) 120) to the core network 130 and may act as a parent node to IAB node(s) 104. For example, the DU 165 of an IAB donor may relay transmissions to UEs 115 through IAB node(s) 104, or may directly signal transmissions to a UE 115, or both. The CU 160 of the IAB donor may signal communication link establishment via an Fl interface to IAB node(s) 104, and the IAB node(s) 104 may schedule transmissions (e.g., transmissions to the UEs 115 relayed from the IAB donor) through one or more DUs (e.g., DUs 165). That is, data may be relayed to and from IAB node(s) 104 via signaling via an NR Uu interface to MT of IAB node(s) 104 (e.g., other IAB node(s)). Communications with IAB node(s) 104 may be scheduled by a DU 165 of the IAB donor or of IAB node(s) 104.

[0048] In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support test as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., components such as an IAB node, a DU 165, a CU 160, an RU 170, an RIC 175, an SMO system 180).

[0049] A 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 othersuitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A 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 examples, a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (loT) device, an Internet of Everything (loE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, vehicles, or meters, among other examples.

[0050] The UEs 115 described herein may be able to communicate with various types of devices, such as UEs 115 that may sometimes operate as relays, as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.

[0051] The UEs 115 and the network entities 105 may wirelessly communicate with one another via the communication link(s) 125 (e.g., one or more access links) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined PHY layer structure for supporting the communication link(s) 125. For example, a carrier used for the communication link(s) 125 may include a portion of an RF spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more PHY layer channels for a given RAT (e.g., LTE, LTE-A, LTE-A Pro, NR). Each PHY layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting,” “receiving,” or “communicating,” when referring to a network entity 105, may refer to any portion of anetwork entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities, such as one or more of the network entities 105).

[0052] In some examples, such as in a carrier aggregation configuration, a carrier may have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute RF channel number (EARFCN)) and may be identified according to a channel raster for discovery by the UEs 115. A carrier may be operated in a standalone mode, in which case initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non- standalone mode, in which case a connection is anchored using a different carrier (e.g., of the same or a different RAT).

[0053] The communication link(s) 125 of the wireless communications system 100 may include downlink transmissions (e.g., forward link transmissions) from a network entity 105 to a UE 115, uplink transmissions (e.g., return link transmissions) from a UE 115 to a network entity 105, or both, among other configurations of transmissions. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode).

[0054] A carrier may be associated with a particular bandwidth of the RF spectrum and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a set of bandwidths for carriers of a particular RAT (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communications system 100 (e.g., the network entities 105, the UEs 115, or both) may have hardware configurations that support communications using a particular carrier bandwidth or may be configurable to support communications using one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include network entities 105 or UEs 115 that support concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.

[0055] Signal waveforms transmitted via a carrier may be made up of 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 resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity 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), such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam), and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.

[0056] The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts= l / (A / mflx■ Ay) seconds, for which fmaxmay represent a supported subcarrier spacing, and Ay may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource 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 multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems, such as the wireless communications system 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., Ay) sampling periods.The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.

[0058] A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0059] Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to UEs 115 (e.g., one or more UEs) or may include UE-specific search space sets for sending control information to a UE 115 (e.g., a specific UE).

[0060] In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area, such as the coverage area 110. In some examples, coverage areas 110 (e.g., different coverage areas) associated with different technologies may overlap, but the coverage areas 110 (e.g., different coverage areas) may be supported by the same network entity (e.g., a network entity 105). In some other examples, overlappingcoverage areas, such as a coverage area 110, associated with different technologies may be supported by different network entities (e.g., the network entities 105). The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 support communications for coverage areas 110 (e.g., different coverage areas) using the same or different RATs.

[0061] The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC). The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications 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 may be used interchangeably herein.

[0062] In some examples, a UE 115 may be configured to support communicating directly with other UEs (e.g., one or more of the UEs 115) via a device-to-device (D2D) communication link, such as a D2D communication link 135 (e.g., in accordance with a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170), which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to- many (1 :M) system in which each UE 115 transmits to one or more of the UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.

[0063] In some systems, a D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115). In some examples, vehicles may communicate using vehicle-to- everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., network entities 105, base stations 140, RUs 170) using vehicle-to- network (V2N) communications, or with both.

[0064] 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 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.

[0065] The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to asclusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than one hundred kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

[0066] The wireless communications system 100 may also operate using a super high frequency (SHF) region, which may be in the range of 3 GHz to 30 GHz, also known as the centimeter band, or using an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the network entities 105 (e.g., base stations 140, RUs 170), and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, such techniques may facilitate using antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.

[0067] The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) RAT, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA). Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0068] A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such astransmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.

[0069] The network entities 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), for which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), for which multiple spatial layers are transmitted to multiple devices.

[0070] 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 transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antennaarray such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation).

[0071] A network entity 105 or a UE 115 may use beam sweeping techniques as part of beamforming operations. For example, a network entity 105 (e.g., a base station 140, an RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a network entity 105 multiple times along different directions. For example, the network entity 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device, such as a network entity 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the network entity 105.

[0072] Some signals, such as data signals associated with a particular receiving device, may be transmitted by a transmitting device (e.g., a network entity 105 or a UE 115) along a single beam direction (e.g., a direction associated with the receiving device, such as another network entity 105 or UE 115). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted along one or more beam directions. For example, a UE 115 may receive one or more of the signals transmitted by the network entity 105 along different directions and may report to the network entity 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.

[0073] In some examples, transmissions by a device (e.g., by a network entity 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from a network entity 105 to a UE 115). The UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more sub-bands. The network entity 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a CSI-RS), which may be precoded or unprecoded. The UE 115 may provide feedback for beam selection, which may be a PMI or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted along one or more directions by a network entity 105 (e.g., a base station 140, an RU 170), a UE 115 may employ similar techniques for transmitting signals multiple times along different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal along a single direction (e.g., for transmitting data to a receiving device).

[0074] A receiving device (e.g., a UE 115) may perform reception operations in accordance with multiple receive configurations (e.g., directional listening) when receiving various signals from a transmitting device (e.g., a network entity 105), such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may perform reception in accordance with multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned along a beam directiondetermined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to- noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

[0075] The wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP -based. An RLC layer may perform packet segmentation and reassembly to communicate via logical channels. A MAC layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer also may implement error detection techniques, error correction techniques, or both to support retransmissions to improve link efficiency. In the control plane, an RRC layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a network entity 105 or a core network 130 supporting radio bearers for user plane data. A PHY layer may map transport channels to physical channels.

[0076] The UEs 115 and the network entities 105 may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly via a communication link (e.g., the communication link(s) 125, a D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in relatively poor radio conditions (e.g., low signal -to-noise conditions). In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific slot for data received via a previous symbol in the slot. In some other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.

[0077] Some wireless communications systems may use reference signals which a receiving device, such as a UE 115, may measure to estimate downlink channel characteristics. For example, a network entity 105 may transmit a CSI-RS to a UE 115. The UE 115 may measure the CSI-RS and estimate downlink channel characteristics based on the measurement of the CSI-RS. The UE 115 may report CSI, for example bytransmitting a CSI report, to indicate CSI parameters. CSI parameters may include CAI, RI, PMI, a layer indicator (LI), a CSI-RS resource indicator (CRI), an SSB resource indicator (SRI), an LI RSRP, or any combination thereof. CSI reporting may be used for link adaptation, MIMO rank selection or adaptation, precoding selection, beam management, or any combination thereof.

[0078] In some examples, the UE 115 may transmit an uplink SRS to the network entity 105. The network entity 105 may measure the SRS and determine uplink channel characteristics. In some examples, the network entity 105 may determine downlink channel characteristics based on the measurement of the SRS using channel reciprocity, where the uplink channel characteristics are indicative of the downlink channel characteristics.

[0079] CSLRS may be used for downlink channel state feedback (CSF) for both frequency division duplex (FDD) communications and time division duplex (TDD) communications. A CSLRS may be associated with a codebook or precoding. In some examples, the codebook may have codebook quantization error. In some examples, up to 32 ports may be supported for CSLRS. SRS may be used for channel-reciprocity- based downlink MIMO for TDD communications. In some examples, SRS may not be associated with a codebook or codebook quantization error.

[0080] In some examples, downlink MIMO precoding may be based on PMI or SRS, or both. PMLbased downlink MIMO precoding techniques may include codebook-based procedures used for both FDD and TDD systems. In some examples, PMLbased techniques may be used when an RI is greater than a quantity of SRS antennas or SRS antenna switching is not implemented. PMLbased techniques may have a larger spatial granularity, which may provide limited multi-used MIMO. PML based techniques may have overhead including downlink CSLRS transmission and physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission for CSI reporting.

[0081] SRS-based downlink MIMO precoding techniques may be based on uplinkdownlink channel reciprocity. SRS-based downlink MIMO precoding techniques may be implemented for TDD systems. SRS-based techniques may be implemented when SRS antenna switching is configured or when an RI is less than or equal to a quantity ofSRS antennas at a UE 115. SRS-based techniques may have a higher spatial granularity and dynamic beamforming sequence compared to PMI-based techniques, which may be beneficial for MU-MIMO techniques. SRS-based techniques may have overhead including uplink SRS transmission. In some examples, SRS-based techniques may have less frequency downlink CSI transmission and CSI reporting.

[0082] In a TDD system, a network entity 105 may receive and measure an SRS from a UE 115 and define a downlink precoding matrix based on channel reciprocity. For example, a UE 115 may transmit four SRS transmissions through four respective UE transmit antennas. The network entity 105 may calculate a beamforming weight and transmit a beamformed PDSCH message to the UE 115 using the calculated beamforming weight.

[0083] For a CSI-based downlink beamforming procedure, a network entity 105 may transmit a CSI-RS to a UE 115. For example, the network entity 105 may transmit a 32-port CSI-RS to the UE 115. The UE 115 may calculate PMI and transmit a CSI report indicate an RI, a CQI, and a PMI. The network entity 105 may transmit a beamformed PDSCH message to the UE 115 using the CSI parameters (e.g., the RI, the CQI, and the PMI).

[0084] In some examples, both SRS and CSI-based downlink MIMO techniques are implemented. For example, a sub-6 GHz TDD system may use both SRS-based downlink MIMO techniques and PMI-based downlink MIMO techniques. There may be differences between SINR or spectral efficiency metrics for CSI-RS and SINR or spectral efficiency metrics for PDSCH. For example, the same CSI interference measurements may be configured across cells, or different interferences may be measured between CSI-RS and PDSCH.

[0085] In some cases, both a UE 115 and a network entity 105 may adjust CQI or RI, or both, as current systems do not provide for coordination between CSI and SRS- based downlink MIMO techniques. This may lead to an over-adjustment to one or more of the CSI parameters. For example, a UE 115 may receive a CSI-RS and reduce a CSI parameter (e.g., CQI or RI) based on the CSI-RS measurement or an interference measurement. The UE 115 may also receive PDSCH signaling from a network entity 105. The UE 115 may fail to decode the PDSCH, and the UE 115 may report a negativeacknowledgment for the PDSCH. Based on the negative acknowledgment for the PDSCH, the network entity 105 may also reduce the CSI parameter. For example, the network entity 105 may not be aware that the UE 115 has already adjusted the CSI parameter based on measurements of the CSI-RS, and the network entity 105 may further adjust the CSI parameter. The network entity 105 may select an MCS layer which is lower than supported for radiofrequency communications, which may degrade downlink MIMO spectral efficiency and downlink throughput.

[0086] The wireless communications system 100 may support techniques for SRS and CSI-based downlink MIMO coordination. For example, a network entity 105 may configure the UE 115 for SRS and CSI-based downlink MIMO coordination. In some examples, the network entity 105 may configure the UE 115 with one or more scale factors for CSI parameter adjustment. For example, the UE 115 may adjust one or more CSI parameters based on CSI-RS metrics (e.g., CSI-RS SINR or CSI interference measurements), an uplink SRS, a PDSCH BLER, a PDSCH DMRS SNR, a PDSCH spectral efficiency, or any combination thereof, in accordance with the one or more scale factors. For example, if a scale factor for a CSI parameter is set to zero, the CSI parameter may only be adjusted based on CSI metrics (e.g., CSI-RS measurements or CSI interference measurements). If the scale factor for the CSI parameter is set to one, the CSI parameter may be adjusted based on CSI metrics and one or more other metrics, such as PDSCH BLER, DMRS SNR, and the like.

[0087] By configuring the scale factor, the network entity 105 and the UE 115 may determine whether CSI parameters are adjusted based on CSI-RS or based on CSI-RS and other metrics or measurements. This may prevent the CSI parameter from being over-adjusted or adjusted by both the UE 115 and the network entity 105. By avoiding over-adjustment or double adjustment (e.g., by both the UE 115 and the network entity 105), downlink MIMO performance degradation may be prevented.

[0088] FIG. 2 shows an example of a wireless communications system 200 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The wireless communications system 200 may implement aspects of a wireless communications system 100. For example, the wireless communications system 200 may include a UE 115-a and a network entity 105-a, which may be respective examples of a UE 115 and a network entity 105 asdescribed herein. The UE 115-a may transmit signaling to the network entity 105-a via an uplink or uplink channels. The network entity 105-a may transmit signaling to the UE 115-a via a downlink or downlink channels.

[0089] The network entity 105-a or the UE 115-a, or both, may implement techniques to coordinate between SRS-based parameter adjustment and CSI-based parameter adjustment for downlink MIMO. For example, the UE 115-a may include a CSI determination component 205, and the network entity 105-a may include a CSI determination component 210. Either the UE 115-a or the network entity 105-a may adjust one or more CSI parameters, such as an RI, a CQI, or a PMI. The coordination techniques described herein may enable the UE 115-a and the network entity 105-a to coordinate adjustments to CSI parameters, such that one device may, or may not, adjust the CSI parameters based on previous adjustments to the CSI parameters performed by the other device.

[0090] The UE 115-a may transmit a capability message 215 indicating capability information for the UE 115-a. For example, the UE 115-a may indicate that the UE 115-a supports SRS and CSI-based downlink MIMO coordination. The network entity 105-a may transmit signaling indicating a coordination configuration 230 to the UE 115-a based on the capability of the UE 115-a. In some examples, the coordination configuration 230 may indicate one or more scale factors for one or more CSI parameters. For example, the coordination configuration 230 may indicate a first scale factor associated with CQI and a second scale factor associated with RI. In some examples, the coordination configuration 230 may indicate multiple scale factors for a single CSI parameter, where each of the multiple scale factors are associated with different measurements or metrics. For example, the coordination configuration 230 may indicate a first scale factor associated with CQI and PDSCH BLER and a second scale factor associated with CQI and PDSCH DMRS SNR. Additionally, or alternatively, the coordination configuration 230 may indicate a range of values for the one or more scale factors.

[0091] In some examples, the UE 115-a may transmit an SRS 220. The network entity 105-a may measure the SRS 220 and select a PMI for the downlink channel based on a channel reciprocity between the uplink channel and the downlink channel. The network entity 105-a may transmit a PDSCH signal 240 to the UE 115-a. The UE 115-amay transmit feedback for the PDSCH signal 240. For example, if the UE 115-a is unable to decode the PDSCH signal 240, the UE 115-a may report a negative acknowledgment. Additionally, or alternatively, the feedback may indicate a BLER for the PDSCH signal 240.

[0092] In some examples, the network entity 105-a may transmit a CSI-RS 235 to the UE 115-a. The UE 115-a may measure the CSI-RS 235 to estimate the downlink channel. In some examples, the network entity 105-a may configure the UE 115-a for a CSI interference measurement via a CSI interference measurement resource, and the UE 115-a may determine an interference measurement via the CSI interference measurement resource. For example, the CSI-RS 235 may be an example of a CSI-RS used for interference measurement or a CSI-RS used for channel measurement, or both.

[0093] The UE 115-a may determine one or more CSI parameters in accordance with the one or more scale factors indicated by the coordination configuration 230. For example, the UE 115-a may determine CQI based on a first scale factor. A value of the first scale factor may indicate whether CQI is to be adjusted based on CSI measurements or other measurements. For example, if a value of the first scale factor is zero, the UE 115-a may determine CQI only based on measurements of the CSI-RS 235. If the value of the first scale factor is one, the UE 115-a may determine CQI based on the measurements of the CSI-RS 235 and another measurement associated with the scale factor, such as the BLER of the PDSCH signal 240, equally. If the value of the first scale factor is between zero and one, the UE 115-a may determine CQI based on a weighting of the measurements of the CSI-RS 235 and the other measurement associated with the scale factor.

[0094] For example, the UE 115-a may adjust the CQI based on the BLER of the PDSCH signal 240 in accordance with the first scale factor. If the scale factor is a first value (e.g., zero), the UE 115-a may not adjust the CQI based on the BLER of the PDSCH signal 240. If the scale factor is a second value (e.g., zero), the UE 115-a may adjust the CQI based on the BLER of the PDSCH signal 240. If the scale factor is between the first value and the second value (e.g., between zero and one), the UE 115-a may adjust the CQI based on the BLER of the PDSCH signal 240 according to a weighting of the scale factor.

[0095] The UE 115-a may transmit a CSI report 225 indicating one or more CSI parameters determine, or adjusted, according to the one or more scale factors. For example, the CSI report 225 may indicate a CQI, an RI, or a PMI, or any combination thereof, which may be adjusted or determined in accordance with one or more scale factors. The network entity 105-a may receive the CSI report 225 and may adjust one or more of the CSI parameters indicated by the CSI report 225 in accordance with the one or more scale factors. For example, if a scale factor for the CQI configures the UE 115-a to adjust the CQI based on the BLER of the PDSCH signal 240, the network entity 105-a may not adjust the CQI based on the feedback message from the UE 115-a indicating the BLER of the PDSCH signal 240, as the UE 115-a may have already adjusted the CQI based on the BLER of the PDSCH signal 240.

[0096] FIG. 3 shows an example of a process flow 300 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The process flow 300 may implement aspects of a wireless communications system 100 or a wireless communications system 200. For example, the process flow 300 may be implemented by a UE 115-b or a network entity 105-b, or both, which may be respective examples of a UE 115 and a network entity 105 described herein.

[0097] Alternative examples of the following may be implemented, where some steps are performed in a different order than described or are not performed at all. In some cases, steps may include additional features not mentioned below, or further steps may be added. Although the UE 115-b and the network entity 105-b are shown performing the operations of the process flow 300, some aspects of some operations may also be performed by one or more other wireless devices.

[0098] In some examples, at 305, the UE 115-b may transmit capability information to the network entity 105-b. The UE 115-b may indicate a capability to support SRS and CSLbased downlink MIMO coordination. For example, the UE 115-b may transmit a message indicating a capability of the UE 115-b to adjust the value of a CSI parameter according to a scale factor.

[0099] At 310, the network entity 105-b may indicate a coordination configuration (e.g., transmit a control signal). For example, the network entity 105-b may enable andconfiguration SRS and CSI-based downlink MIMO coordination. The UE 115-b may receive a control signal indicating a scale factor for a CSI parameter. The scale factor may correspond to a CSI-RS measurement, such as a channel measurement based on CSI-RS or an interference measurement.

[0100] In some examples, the coordination configuration may indicate one or more scale factors corresponding to one or more CSI parameters or one or more measurements, or both. In some examples, a scale factor may be associated with multiple measurements or metrics. For example, a scale factor associated with CQI may be associated with SRS measurements, BLER measurements, SNR measurements, interference measurements, channel measurements, spectral efficiency measurements, or any combination thereof.

[0101] For example, the control signal may indicate multiple scale factors including at least a first scale factor corresponding to the CSI-RS measurement and a second scale factor corresponding to a second metric. The second metric may be associated with, or determined based on, an SRS, a PDSCH BLER, a DMRS SNR, a PDSCH spectrum efficiency, or any combination thereof. The first scale factor and the second scale factor indicate a weighting value for the CSI-RS measurement and the second metric. For example, the control signal may indicate a first scale factor, al, associated with how much to adjust a CSI parameter based on the CSI-RS measurement and a second scale factor, a2, associated with how much to adjust the CSI parameter based on the second metric. Additionally, or alternatively, a single scale factor may correspond to a single value which indicates a weighting between a first metric (e.g., the CSI-RS measurement) and the second metric (e.g., the SRS, PDSCH BLER, DMRS SNR, or PDSCH spectrum efficiency).

[0102] In some examples, the control signal may indicate different scale factors for different CSI parameters. For example, the control signal may indicate a first scale factor associated with adjusting CQI and a second scale factor associated with adjusting RI. In some examples, a scale factor may be associated with multiple second metrics. For example, a scale factor may be associated with weighing an adjustment of a CSI parameter between CSI-RS measurement, a PDSCH BLER, and a PDSCH DMRS SNR.

[0103] In some examples, at 315, the UE 115-b may transmit an SRS to the network entity 105-b. The network entity 105-b may measure the SRS. In some examples, the network entity 105-b may determine one or more CSI parameters based on the SRS. For example, the network entity 105-b may determine a PMI for a downlink channel based on the measurement of the SRS and channel reciprocity. In some examples, the network entity 105-b may transmit a PDSCH message to the UE 115-b. In some examples, the network entity 105-b may transmit the PDSCH message using a PMI determined based on measurement of the SRS and a channel reciprocity between an uplink channel and the downlink channel. The UE 115-b may attempt to decode the PDSCH message. The UE 115-b may transmit feedback for the PDSCH message. The feedback for the PDSCH message may indicate a BLER measurement of the PDSCH message. In some examples, the UE 115-b may be unable to decode the PDSCH message, and the UE 115-b may indicate a NACK or a high BLER measurement, or both, for the PDSCH message. In some other examples, the UE 115-b may be able to decode the PDSCH message, and the UE 115-b may indicate an acknowledgment or a low BLER measurement, or both, for the PDSCH message.

[0104] In some examples, at 325, the network entity 105-b may transmit one or more reference signals, such as a CSI-RS, to the UE 115-b. The UE 115-b may measure an SINR and a spectral efficiency for the CSI-RS. In some examples, the UE 115-b may receive a CSI-RS associated with channel measurement or interference measurement, or both. For example, the UE 115-b may determine a channel measurement, based on receiving one or more CSI-RS. The UE 115-b may determine a value of a CSI parameter based on the CSI-RS. For example, the UE 115-b may determine an initial value for a CSI parameter, such as CQI, RI, or PMI, based on a measurement of the CSI-RS. In some examples, the network entity 105-b may configure the UE 115-b for an interference measurement via a CSI interference measurement resource. The UE 115-b may measure signaling from neighboring cells via the CSI interference measurement resource, for example during which the network entity 105-b does not transmit to the UE 115-b. The UE 115-b may, for example, measure CSI-RS from neighbor cells to obtain the interference measurement.

[0105] At 330, the UE 115-b may adjust the initial value for the CSI parameter according to the scale factor. For example, the UE 115-b may adjust an SINRmeasurement or spectral efficiency measurement based on the CSI-RS channel measurement or the CSI interference measurement and a second metric associated with the scale factor. The second metric associated with the scale factor may be, for example, the BLER for the PDSCH message received at 320, an SNR of a DMRS received with the PDSCH message at 320, the SRS message transmitted at 315, a spectral efficiency measurement of the PDSCH message, or any combination thereof.

[0106] A value of the scale factor may correspond to how the UE 115-b adjusts the initial value for the CSI parameter. The UE 115-b may adjust the CSI parameter according to the one or more scale factors indicated by the network entity 105-b. If the scale factor is set to a first value, the UE 115-b may adjust the CSI parameter more heavily based on the CSI-RS measurement. For example, if the scale factor is set to zero (e.g., al / a2 =0), the UE 115-b may adjust the initial value of the CSI parameter solely based on the CSI-RS channel measurement or CSI-RS interference measurement, or both. If the scale factor is set to a second value (e.g., al / a2 =1), the UE 115-b may adjust the initial value of the CSI parameter based on both the CSI-RS measurement (e.g., CSI-RS channel measurement or CSI-RS interference measurement, or both) and the second metric associated with the scale factor. For example, the UE 115-b may adjust the initial value of the CSI parameter based on the CSI-RS measurement and the second metric associated with the scale factor evenly. If the scale factor is set between the first value and the second value (e.g., al / a2 = value between 0 and 1), the UE 115-b may use a weighted value (e.g., al / a2) to adjust the CSI parameter based on the CSI-RS measurement and the second metric associated with the scale factor.

[0107] At 335, the UE 115-b may transmit a CSI report indicating the adjusted value of the CSI parameter in accordance with the scale factor. In some examples, the CSI report may indicate multiple CSI parameters, one or more of which may be adjusted by the UE 115-b according to one or more scale factors. For example, the UE 115-b may transmit a CSI report indicating an adjusted CQI value, an adjusted PMI value, an adjusted RI value, or any combination thereof.

[0108] The network entity 105-b may receive the CSI report and may adjust the CQI or RI, or both, based on the scale factor at 340 (e.g., adjust based on al / a2). For example, the network entity 105-b may adjust one or more CSI parameters based on the scale factor to avoid double-adjustment of the one or more CSI parameters. In someexamples, the network entity 105-b may not adjust a CSI parameter, as the UE 115-b may have already adjusted the CSI parameter according to the scale factor.

[0109] In some examples, the UE 115-b may transmit an indication of a preferred scale factor at 345. For example, the UE 115-b may transmit an indication of a recommendation for one or more scale factors. The UE 115-b may transmit the indication of the preferred scale factor via a MAC CE or a CSI report.

[0110] At 350, the network entity 105-b may transmit an indication of one or more updated scale factors to the UE 115-b. For example, the network entity 105-b may dynamically change a scale factor or a value for the scale factor (e.g., adjust al, a2, or both). In some examples, the network entity 105-b may update a scale factor based on radiofrequency conditions, mobility of the UE 115-b, a Quality of Service (QoS) requirement, or any combination thereof. The network entity 105-b may transmit the indicate of the updated scale factor via a MAC CE or downlink control information. The UE 115-b may adjust CSI parameters in accordance with the updated one or more scale factors.

[0111] FIG. 4 shows a block diagram 400 of a device 405 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The device 405 may be an example of aspects of a UE 115 as described herein. The device 405 may include a receiver 410, a transmitter 415, and a communications manager 420. The device 405, or one or more components of the device 405 (e.g., the receiver 410, the transmitter 415, the communications manager 420), may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses).

[0112] The receiver 410 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to downlink multiple-input, multiple-output coordination). Information may be passed on to other components of the device 405. The receiver 410 may utilize a single antenna or a set of multiple antennas.

[0113] The transmitter 415 may provide a means for transmitting signals generated by other components of the device 405. For example, the transmitter 415 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to downlink multiple-input, multiple-output coordination). In some examples, the transmitter 415 may be co-located with a receiver 410 in a transceiver module. The transmitter 415 may utilize a single antenna or a set of multiple antennas.

[0114] The communications manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be examples of means for performing various aspects of downlink multiple-input, multiple-output coordination as described herein. For example, the communications manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be capable of performing one or more of the functions described herein.

[0115] In some examples, the communications manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include at least one of 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 configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory).

[0116] Additionally, or alternatively, the communications manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor (e.g., referred to as a processor-executable code). If implemented in code executed by at least one processor, the functions of the communications manager 420, the receiver 410, the transmitter 415, or variouscombinations 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, individually or collectively, a means for performing the functions described in the present disclosure).

[0117] In some examples, the communications manager 420 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 410, the transmitter 415, or both. For example, the communications manager 420 may receive information from the receiver 410, send information to the transmitter 415, or be integrated in combination with the receiver 410, the transmitter 415, or both to obtain information, output information, or perform various other operations as described herein.

[0118] The communications manager 420 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 420 is capable of, configured to, or operable to support a means for receiving a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement. The communications manager 420 is capable of, configured to, or operable to support a means for receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS. The communications manager 420 is capable of, configured to, or operable to support a means for transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0119] By including or configuring the communications manager 420 in accordance with examples as described herein, the device 405 (e.g., at least one processor controlling or otherwise coupled with the receiver 410, the transmitter 415, the communications manager 420, or a combination thereof) may support techniques for enhanced MIMO performance and more efficient utilization of communication resources.

[0120] FIG. 5 shows a block diagram 500 of a device 505 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The device 505 may be an example of aspects of a device 405 or a UE 115 as described herein. The device 505 may include a receiver 510, a transmitter515, and a communications manager 520. The device 505, or one or more components of the device 505 (e.g., the receiver 510, the transmitter 515, the communications manager 520), may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses).

[0121] The receiver 510 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to downlink multiple-input, multiple-output coordination). Information may be passed on to other components of the device 505. The receiver 510 may utilize a single antenna or a set of multiple antennas.

[0122] The transmitter 515 may provide a means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to downlink multiple-input, multiple-output coordination). In some examples, the transmitter 515 may be co-located with a receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a set of multiple antennas.

[0123] The device 505, or various components thereof, may be an example of means for performing various aspects of downlink multiple-input, multiple-output coordination as described herein. For example, the communications manager 520 may include a scale factor configuration component 525, a CSI measurement component 530, a CSI report component 535, or any combination thereof. The communications manager 520 may be an example of aspects of a communications manager 420 as described herein. In some examples, the communications manager 520, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 510, the transmitter 515, or both. For example, the communications manager 520 may receive information from the receiver 510, send information to the transmitter 515, or be integrated in combination with the receiver 510, the transmitter515, or both to obtain information, output information, or perform various other operations as described herein.

[0124] The communications manager 520 may support wireless communications in accordance with examples as disclosed herein. The scale factor configuration component 525 is capable of, configured to, or operable to support a means for receiving a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement. The CSI measurement component 530 is capable of, configured to, or operable to support a means for receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS. The CSI report component 535 is capable of, configured to, or operable to support a means for transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0125] FIG. 6 shows a block diagram 600 of a communications manager 620 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The communications manager 620 may be an example of aspects of a communications manager 420, a communications manager 520, or both, as described herein. The communications manager 620, or various components thereof, may be an example of means for performing various aspects of downlink multiple-input, multiple-output coordination as described herein. For example, the communications manager 620 may include a scale factor configuration component 625, a CSI measurement component 630, a CSI report component 635, a downlink measurement component 640, a capability component 645, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories), may communicate, directly or indirectly, with one another (e.g., via one or more buses).

[0126] The communications manager 620 may support wireless communications in accordance with examples as disclosed herein. The scale factor configuration component 625 is capable of, configured to, or operable to support a means for receiving a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement. The CSI measurement component 630 is capable of, configured to, or operable to support a means for receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS. The CSI report component 635is capable of, configured to, or operable to support a means for transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0127] In some examples, the downlink measurement component 640 is capable of, configured to, or operable to support a means for receiving a downlink shared channel transmission, where the adjusted value of the CSI parameter is based on a PDSCH BLER for the downlink shared channel transmission and the scale factor.

[0128] In some examples, the downlink measurement component 640 is capable of, configured to, or operable to support a means for receiving a downlink shared channel transmission, where the adjusted value of the CSI parameter is based on a demodulation reference signal signal-to-noise ratio for the downlink shared channel transmission and the scale factor.

[0129] In some examples, the downlink measurement component 640 is capable of, configured to, or operable to support a means for receiving a downlink shared channel transmission having one or more characteristics associated with an uplink sounding reference signal, where the adjusted value of the CSI parameter is based on the uplink SRS and the scale factor.

[0130] In some examples, the downlink measurement component 640 is capable of, configured to, or operable to support a means for receiving a downlink shared channel transmission, where the adjusted value of the CSI parameter is based on a spectrum efficiency for the downlink shared channel transmission and the scale factor.

[0131] In some examples, the capability component 645 is capable of, configured to, or operable to support a means for transmitting a message indicating a capability of the UE to adjust the value of the CSI parameter according to the scale factor, where the control signal is received based on the capability of the UE.

[0132] In some examples, the adjusted value of the CSI parameter is only based on the CSI-RS according to the scale factor.

[0133] In some examples, the control signal indicates a set of multiple scale factors including at least a first scale factor corresponding to the CSI-RS measurement and a second scale factor corresponding to a second metric from an SRS, a PDSCH BLER, a DMRS SNR, or a PDSCH spectrum efficiency, or any combination thereof. In someexamples, the first scale factor and the second scale factor indicate a weighting value for the CSI-RS measurement and the second metric.

[0134] In some examples, the CSI parameter includes a channel quality indicator or a rank indicator.

[0135] In some examples, the control signal indicates a first scale factor for the channel quality indicator and a second scale factor for the rank indicator.

[0136] In some examples, the scale factor configuration component 625 is capable of, configured to, or operable to support a means for receiving a second control signal indicating a second scale factor for the CSI parameter in response to the CSI report.

[0137] In some examples, the control signal or the second control signal, or both, are transmitted via a medium access control element or downlink control information, or both.

[0138] In some examples, the control signal or the second control signal, or both, are transmitted via a medium access control element or downlink control information, or both.

[0139] In some examples, the scale factor configuration component 625 is capable of, configured to, or operable to support a means for adjusting the scale factor for the CSI parameter based on radiofrequency conditions, mobility of the UE, an application QoS requirement, or any combination thereof.

[0140] In some examples, the scale factor is associated with an uplink SRS, a PDSCH BLER, a PDSCH demodulation reference signal signal-to-noise ratio, a PDSCH spectrum efficiency, or any combination thereof.

[0141] In some examples, the scale factor configuration component 625 is capable of, configured to, or operable to support a means for receiving a second control signal indicating a further adjusted CSI parameter in response to the CSI report.

[0142] FIG. 7 shows a diagram of a system 700 including a device 705 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The device 705 may be an example of or include components of a device 405, a device 505, or a UE 115 as described herein. Thedevice 705 may communicate (e.g., wirelessly) with one or more other devices (e.g., network entities 105, UEs 115, or a combination thereof). The device 705 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 720, an input / output (I / O) controller, such as an I / O controller 710, a transceiver 715, one or more antennas 725, at least one memory 730, code 735, and at least one processor 740. 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 745).

[0143] The I / O controller 710 may manage input and output signals for the device 705. The I / O controller 710 may also manage peripherals not integrated into the device 705. In some cases, the I / O controller 710 may represent a physical connection or port to an external peripheral. In some cases, the I / O controller 710 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX®, or another known operating system. Additionally, or alternatively, the I / O controller 710 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I / O controller 710 may be implemented as part of one or more processors, such as the at least one processor 740. In some cases, a user may interact with the device 705 via the I / O controller 710 or via hardware components controlled by the I / O controller 710.

[0144] In some cases, the device 705 may include a single antenna. However, in some other cases, the device 705 may have more than one antenna, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 715 may communicate bi-directionally via the one or more antennas 725 using wired or wireless links as described herein. For example, the transceiver 715 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 715 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 725 for transmission, and to demodulate packets received from the one or more antennas 725. The transceiver 715, or the transceiver 715 and one or more antennas 725, may be an example of a transmitter 415, a transmitter 515, a receiver 410, a receiver 510, or any combination thereof or component thereof, as described herein.

[0145] The at least one memory 730 may include random access memory (RAM) and read-only memory (ROM). The at least one memory 730 may store computer- readable, computer-executable, or processor-executable code, such as the code 735. The code 735 may include instructions that, when executed by the at least one processor 740, cause the device 705 to perform various functions described herein. The code 735 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 735 may not be directly executable by the at least one processor 740 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 730 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

[0146] The at least one processor 740 may include one or more intelligent hardware devices (e.g., one or more general-purpose processors, one or more DSPs, one or more CPUs, one or more graphics processing units (GPUs), one or more neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs)), one or more microcontrollers, one or more ASICs, one or more FPGAs, one or more programmable logic devices, discrete gate or transistor logic, one or more discrete hardware components, or any combination thereof). In some cases, the at least one processor 740 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the at least one processor 740. The at least one processor 740 may be configured to execute computer- readable instructions stored in a memory (e.g., the at least one memory 730) to cause the device 705 to perform various functions (e.g., functions or tasks supporting downlink multiple-input, multiple-output coordination). For example, the device 705 or a component of the device 705 may include at least one processor 740 and at least one memory 730 coupled with or to the at least one processor 740, the at least one processor 740 and the at least one memory 730 configured to perform various functions described herein.

[0147] In some examples, the at least one processor 740 may include multiple processors and the at least one memory 730 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiplememories, which may, individually or collectively, be configured to perform various functions described herein. In some examples, the at least one processor 740 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 740) and memory circuitry (which may include the at least one memory 730)), or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 740 or a processing system including the at least one processor 740 may be configured to, configurable to, or operable to cause the device 705 to perform one or more of the functions described herein. Further, as described herein, being “configured to,” being “configurable to,” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code 735 (e.g., processor-executable code) stored in the at least one memory 730 or otherwise, to perform one or more of the functions described herein.

[0148] The communications manager 720 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 720 is capable of, configured to, or operable to support a means for receiving a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement. The communications manager 720 is capable of, configured to, or operable to support a means for receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS. The communications manager 720 is capable of, configured to, or operable to support a means for transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor.

[0149] By including or configuring the communications manager 720 in accordance with examples as described herein, the device 705 may support techniques for improved communication reliability, more efficient utilization of communication resources, and improved coordination between devices.

[0150] In some examples, the communications manager 720 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 715, the one or more antennas 725, or any combination thereof. Although the communications manager 720 is illustrated as aseparate component, in some examples, one or more functions described with reference to the communications manager 720 may be supported by or performed by the at least one processor 740, the at least one memory 730, the code 735, or any combination thereof. For example, the code 735 may include instructions executable by the at least one processor 740 to cause the device 705 to perform various aspects of downlink multiple-input, multiple-output coordination as described herein, or the at least one processor 740 and the at least one memory 730 may be otherwise configured to, individually or collectively, perform or support such operations.

[0151] FIG. 8 shows a flowchart illustrating a method 800 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The operations of the method 800 may be implemented by a UE or its components as described herein. For example, the operations of the method 800 may be performed by a UE 115 as described with reference to FIGs. 1 through 7. In some examples, a 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 perform aspects of the described functions using special-purpose hardware.

[0152] At 805, the method may include receiving a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement. The operations of 805 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 805 may be performed by a scale factor configuration component 625 as described with reference to FIG. 6.

[0153] At 810, the method may include receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS. The operations of 810 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 810 may be performed by a CSI measurement component 630 as described with reference to FIG. 6.

[0154] At 815, the method may include transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor. The operations of 815 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 815 may be performed by a CSI report component 635 as described with reference to FIG. 6.

[0155] FIG. 9 shows a flowchart illustrating a method 900 that supports downlink multiple-input, multiple-output coordination in accordance with one or more aspects of the present disclosure. The operations of the method 900 may be implemented by a UE or its components as described herein. For example, the operations of the method 900 may be performed by a UE 115 as described with reference to FIGs. 1 through 7. In some examples, a 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 perform aspects of the described functions using special-purpose hardware.

[0156] At 905, the method may include receiving a control signal indicating a scale factor for a CSI parameter, the scale factor corresponding to a CSI-RS measurement. The operations of 905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 905 may be performed by a scale factor configuration component 625 as described with reference to FIG. 6.

[0157] At 910, the method may include receiving a CSI-RS, a value of the CSI parameter being based on the CSI-RS. The operations of 910 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 910 may be performed by a CSI measurement component 630 as described with reference to FIG. 6.

[0158] At 915, the method may include receiving a downlink shared channel transmission. The operations of 915 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 915 may be performed by a downlink measurement component 640 as described with reference to FIG. 6.

[0159] At 920, the method may include transmitting a CSI report indicating an adjusted value of the CSI parameter in accordance with the scale factor, where the adjusted value of the CSI parameter is based on a physical downlink shared channel BLER for the downlink shared channel transmission and the scale factor. The operations of 920 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 920 may be performed by a CSI report component 635 as described with reference to FIG. 6.

[0160] The following provides an overview of aspects of the present disclosure:

[0161] Aspect 1 : A method for wireless communications at a UE, comprising: receiving a control signal indicating a scale factor for a channel state information parameter, the scale factor corresponding to a channel state information reference signal measurement; receiving a channel state information reference signal, a value of the channel state information parameter being based at least in part on the channel state information reference signal; and transmitting a channel state information report indicating an adjusted value of the channel state information parameter in accordance with the scale factor.

[0162] Aspect 2: The method of aspect 1, further comprising: receiving a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a physical downlink shared channel block error rate for the downlink shared channel transmission and the scale factor.

[0163] Aspect 3: The method of any of aspects 1 through 2, further comprising: receiving a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a demodulation reference signal signal-to-noise ratio for the downlink shared channel transmission and the scale factor.

[0164] Aspect 4: The method of any of aspects 1 through 3, further comprising: receiving a downlink shared channel transmission having one or more characteristics associated with an uplink sounding reference signal, wherein the adjusted value of the channel state information parameter is based at least in part on the uplink sounding reference signal and the scale factor.

[0165] Aspect 5: The method of any of aspects 1 through 4, further comprising: receiving a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a spectrum efficiency for the downlink shared channel transmission and the scale factor.

[0166] Aspect 6: The method of any of aspects 1 through 5, further comprising: transmitting a message indicating a capability of the UE to adjust the value of the channel state information parameter according to the scale factor, wherein the control signal is received based at least in part on the capability of the UE.

[0167] Aspect 7: The method of any of aspects 1 through 6, wherein the adjusted value of the channel state information parameter is only based on the channel state information reference signal according to the scale factor.

[0168] Aspect 8: The method of any of aspects 1 through 7, wherein the control signal indicates a plurality of scale factors including at least a first scale factor corresponding to the channel state information reference signal measurement and a second scale factor corresponding to a second metric from a sounding reference signal, a physical downlink shared channel block error rate, a demodulation reference signal signal-to-noise ratio, a physical downlink shared channel spectrum efficiency, or any combination thereof, and the first scale factor and the second scale factor indicate a weighting value for the channel state information reference signal measurement and the second metric.

[0169] Aspect 9: The method of any of aspects 1 through 8, wherein the channel state information parameter comprises a channel quality indicator or a rank indicator.

[0170] Aspect 10: The method of aspect 9, wherein the control signal indicates a first scale factor for the channel quality indicator and a second scale factor for the rank indicator.

[0171] Aspect 11 : The method of any of aspects 1 through 10, further comprising: receiving a second control signal indicating a second scale factor for the channel state information parameter in response to the channel state information report.

[0172] Aspect 12: The method of aspect 11, wherein the control signal or the second control signal, or both, are transmitted via a medium access control element or downlink control information, or both.

[0173] Aspect 13: The method of any of aspects 1 through 12, further comprising: adjusting the scale factor for the channel state information parameter based at least in part on radiofrequency conditions, mobility of the UE, an application Quality of Service (QoS) requirement, or any combination thereof.

[0174] Aspect 14: The method of any of aspects 1 through 13, wherein the scale factor is associated with an uplink sounding reference signal, a physical downlink shared channel block error rate, a physical downlink shared channel demodulationreference signal signal-to-noise ratio, a physical downlink shared channel spectrum efficiency, or any combination thereof.

[0175] Aspect 15: The method of any of aspects 1 through 14, further comprising: receiving a second control signal indicating a further adjusted channel state information parameter in response to the channel state information report.

[0176] Aspect 16: A UE for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 1 through 15.

[0177] Aspect 17: A UE for wireless communications, comprising at least one means for performing a method of any of aspects 1 through 15.

[0178] Aspect 18: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to perform a method of any of aspects 1 through 15.

[0179] It should be noted that the methods described herein describe possible implementations. The operations and the steps may be rearranged or otherwise modified and other implementations are possible. Further, aspects from two or more of the methods may be combined.

[0180] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications 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, as well as other systems and radio technologies not explicitly mentioned herein.

[0181] Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagneticwaves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0182] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, a graphics processing unit (GPU), a neural processing unit (NPU), an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration). Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.

[0183] 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 or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

[0184] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM),flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.

[0185] As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of’ or “one or more of’) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.”

[0186] As used herein, including in the claims, the article “a” before a noun is open- ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns. Thus, the terms “a,” “at least one,” “one or more,” and “at least one of one or more” may be interchangeable. For example, if a claim recites “a component” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “acomponent” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent reference to a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components,” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components.” Similarly, subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components. For example, referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components.”

[0187] The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database, or another data structure), ascertaining, and the like. Also, “determining” can include receiving (e.g., receiving information), accessing (e.g., accessing data stored in memory), and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.

[0188] In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label or other subsequent reference label.

[0189] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. Thesetechniques, however, may be practiced without these specific details. In some figures, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0190] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

CLAIMSWhat is claimed is:

1. A user equipment (UE), comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to: receive a control signal indicating a scale factor for a channel state information parameter, the scale factor corresponding to a channel state information reference signal measurement; receive a channel state information reference signal, a value of the channel state information parameter being based at least in part on the channel state information reference signal; and transmit a channel state information report indicating an adjusted value of the channel state information parameter in accordance with the scale factor.

2. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a physical downlink shared channel block error rate for the downlink shared channel transmission and the scale factor.

3. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a demodulation reference signal signal-to-noise ratio for the downlink shared channel transmission and the scale factor.

4. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:transmitting an uplink sounding reference signal, wherein the adjusted value of the channel state information parameter is based at least in part on the uplink sounding reference signal and the scale factor.

5. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a spectrum efficiency for the downlink shared channel transmission and the scale factor.

6. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: transmit a message indicating a capability of the UE to adjust the value of the channel state information parameter according to the scale factor, wherein the control signal is received based at least in part on the capability of the UE.

7. The UE of claim 1, wherein the adjusted value of the channel state information parameter is only based on the channel state information reference signal according to the scale factor.

8. The UE of claim 1, wherein the control signal indicates a plurality of scale factors including at least a first scale factor corresponding to the channel state information reference signal measurement and a second scale factor corresponding to a second metric from a sounding reference signal, a physical downlink shared channel block error rate, a demodulation reference signal signal-to-noise ratio, a physical downlink shared channel spectrum efficiency, or any combination thereof, and the first scale factor and the second scale factor indicate a weighting value for the channel state information reference signal measurement and the second metric.

9. The UE of claim 1, wherein the channel state information parameter comprises a channel quality indicator or a rank indicator.

10. The UE of claim 9, wherein the control signal indicates a first scale factor for the channel quality indicator and a second scale factor for the rank indicator.

11. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive a second control signal indicating a second scale factor for the channel state information parameter in response to the channel state information report.

12. The UE of claim 11, wherein the control signal or the second control signal, or both, are transmitted via a medium access control element or downlink control information, or both.

13. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: adjust the scale factor for the channel state information parameter based at least in part on a radiofrequency condition, mobility of the UE, an application Quality of Service (QoS) requirement, or any combination thereof.

14. The UE of claim 1, wherein the scale factor is associated with an uplink sounding reference signal, a physical downlink shared channel block error rate, a physical downlink shared channel demodulation reference signal signal-to-noise ratio, a physical downlink shared channel spectrum efficiency, or any combination thereof.

15. The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive a second control signal indicating a further adjusted channel state information parameter in response to the channel state information report.

16. A method for wireless communications at a user equipment (UE), comprising: receiving a control signal indicating a scale factor for a channel state information parameter, the scale factor corresponding to a channel state information reference signal measurement; receiving a channel state information reference signal, a value of the channel state information parameter being based at least in part on the channel state information reference signal; and transmitting a channel state information report indicating an adjusted value of the channel state information parameter in accordance with the scale factor.

17. The method of claim 16, further comprising: receiving a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a physical downlink shared channel block error rate for the downlink shared channel transmission and the scale factor.

18. The method of claim 16, further comprising: receiving a downlink shared channel transmission, wherein the adjusted value of the channel state information parameter is based at least in part on a demodulation reference signal signal-to-noise ratio for the downlink shared channel transmission and the scale factor.

19. The method of claim 16, further comprising: transmitting a message indicating a capability of the UE to adjust the value of the channel state information parameter according to the scale factor, wherein the control signal is received based at least in part on the capability of the UE.

20. A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to: receive a control signal indicating a scale factor for a channel state information parameter, the scale factor corresponding to a channel state information reference signal measurement; receive a channel state information reference signal, a value of the channel state information parameter being based at least in part on the channel state information reference signal; and transmit a channel state information report indicating an adjusted value of the channel state information parameter in accordance with the scale factor.

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