Channel state report based on the use of detection reference signal resources in full-duplex mode

Abstract

Methods, systems, and devices for wireless communications are described. An integrated access and backhaul network (IAB) node may receive, from a parent IAB node, a CSI reporting configuration for generating a CSI report associated with at least one channel state information (CSI) reference signal (CSI-RS) resource set monitored by the IAB node, the configuration also indicating usage information for at least one CSI-RS resource set. The IAB node may send a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information. The IAB node may receive a CSI report indicating CSI from a downstream node, the CSI associated with the cross-link interference based at least in part on the number of spatial layers.

Description

[0001] Cross-references

[0002] This patent application claims the benefits of PCT Application No. PCT / CN2020 / 090689, entitled “CHANNELSTATUS REPORT BASED ON SOUNDING REFERENCE SIGNAL RESOURCE USAGE IN FULLDUPLEX,” filed by Huang et al. on May 15, 2020, which is assigned to the assignee of this application. Technical Field

[0003] The following relates generally to wireless communications, and more particularly, to channel state reporting based on sounding reference signal resource usage in full-duplex. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (e.g., long term evolution (LTE) systems, improved LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication for multiple communication devices (which may be further referred to as user equipment (UE)). Summary of the invention

[0005] The described technology relates to improved methods, systems, devices and apparatuses for supporting channel state reporting based on the use of sounding reference signal resources in full duplex. In summary, the described technology provides a base station to send a channel state information (CSI) report configuration message to a UE (e.g., a victim UE that experiences cross link interference (CLI) from an aggressor device). The message may carry or otherwise indicate at least one sounding reference signal (SRS) resource set (e.g., in which the aggressor device sends its SRS) and usage information of the SRS resource set, such as beam management information, codebook and non-codebook, antenna switching information, etc. If the usage information for the SRS resource set is non-codebook use, the base station may indicate the number of spatial layers of the aggressor device. The UE (which may be operating in a full duplex communication mode) determines the number of spatial layers of the CLI based on the indicated SRS resource set and the corresponding usage information. For example, if the use of the SRS resource set is non-codebook, the number of spatial layers may be equal to the indicated number of physical uplink shared channel (PUSCH) spatial layers. As another example, if the use of the SRS resource set is a codebook, the number of spatial layers may be equal to the number of antenna ports of the SRS resources in the SRS resource set. Thus, the UE may determine and report its CSI value for full-duplex mode communication (e.g., in a CLI feedback message) based on the determined number of spatial layers.

[0006] In some aspects of the described technology, such channel state reports may be employed within an integrated access and backhaul network (IAB) network. The IAB network may include an anchor node having a connection to a core network, one or more IAB nodes forming a link within the IAB network, and one or more UEs associated with at least a portion of the IAB node. Broadly speaking, the IAB network provides a backhaul connection to the core network for the UE via one or more intermediate IAB nodes to the anchor IAB node. In some aspects, each IAB node may include a distributed unit (DU) functional unit that manages various aspects of a wireless backhaul link between the IAB node and a parent IAB node (which may be only an upstream IAB node or may be an anchor IAB node) and between the IAB node and a downstream IAB node (which may be referred to as a child IAB node). In addition, each IAB node may also include a mobile terminal (MT) functional unit that manages various aspects of a wireless access link between the IAB node and one or more associated UEs (which may also be considered as downstream nodes in this context).

[0007] For example, a parent IAB node may send or otherwise transmit a CSI reporting configuration to an IAB node (e.g., a node between a parent IAB node of a downstream IAB node within an IAB network). In general, a CSI reporting configuration may generally carry or otherwise transmit information identifying how an IAB node generates a CSI report based on monitoring a CSI reference signal (CSI-RS) transmission from a parent IAB node. In some aspects, a CSI reporting configuration may also carry or otherwise transmit usage information for a CSI-RS resource set (e.g., information identifying the use of a CSI-RS transmission). Based on the CSI reporting configuration, the IAB node may send or otherwise provide a CSI resource configuration to a downstream node (which may be only a downstream IAB node served by a DU functional unit or may be a UE served by an MT functional unit). The parent IAB node may send a CSI-RS according to a CSI-RS resource set, and the IAB node may monitor the CSI-RS to determine the CSI for the parent IAB node. However, the downstream IAB node may also receive a CSI-RS transmission from the parent IAB node (which may be a CLI from the perspective of the downstream node) and determine (e.g., based on a CSI resource configuration provided to the downstream IAB node) CSI information (e.g., CLI information) for the parent IAB node. Thus, the downstream IAB node may send or otherwise provide a CSI report to the IAB node indicating CSI information for the parent node. That is, the CSI for the parent node may be associated with a CLI based on the number of spatial layers associated with the parent IAB node. Thus, the IAB node may identify or otherwise determine the number of interfering spatial layers associated with the parent IAB node, which may be equal to or less than the number of CSI-RS ports associated with the CSI-RS resource set.

[0008] In addition, such technology can be used in upstream scenarios within the IAB network. For example, the IAB node can send or otherwise provide an SRS measurement configuration to the parent IAB node. In a broad sense, the SRS measurement configuration can provide information to be used by the parent IAB node to measure the CLI on the reference signal resource set (e.g., SRS resource set) to be used by the downstream node to send SRS. The SRS measurement configuration can also identify or otherwise indicate the number of spatial layers of the CLI associated with the downstream node (e.g., based on the usage information for the reference signal resource). The IAB node can also send or otherwise provide an SRS transmission configuration to the downstream node, which carries or otherwise transmits information identifying the reference signal resource set to be used by the downstream node to send SRS. The SRS transmission configuration can also carry or otherwise transmit information identifying the usage information of the reference signal resource. The downstream IAB node sends the SRS according to the SRS transmission configuration, and the IAB node can use the SRS to determine the channel state of the link between the IAB nodes in the downstream node. However, the parent IAB node can also receive and measure the SRS transmission of the downstream IAB node. Again, this can provide an indication of the CLI to the parent IAB node based on the channel state of the link between the IAB node and its downstream IAB node. Therefore, the parent IAB node can also identify or otherwise determine the amount of interference (e.g., channel state / CLI interference) and make scheduling decisions for the IAB node and / or the downstream IAB node. The parent IAB node can send or otherwise provide uplink resource configuration (e.g., physical uplink control channel (PUCCH) and / or physical uplink shared channel (PUSCH) resource configuration) based on the CLI determined by the parent IAB node measuring the SRS transmission of the downstream IAB node. Again, this can be based on usage information (e.g., the number of spatial layers of the CLI associated with the downstream IAB node).

[0009] A method of wireless communication at a UE is described. The method may include: receiving a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration further indicating usage information for the at least one reference signal resource set; determining a number of spatial layers of a CLI associated with the interfering device based on the usage information; determining channel state information associated with the CLI based on the number of spatial layers; and sending the CLI feedback message indicating the channel state information.

[0010] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set; determine the number of spatial layers of the CLI associated with the interfering device based on the usage information; determine channel state information associated with the CLI based on the number of spatial layers; and send the CLI feedback message indicating the channel state information.

[0011] Another apparatus for wireless communication at a UE is described. The apparatus may include means for: receiving a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration further indicating usage information for the at least one reference signal resource set; determining a number of spatial layers of a CLI associated with the interfering device based on the usage information; determining channel state information associated with the CLI based on the number of spatial layers; and sending the CLI feedback message indicating the channel state information.

[0012] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set; determine a number of spatial layers of a CLI associated with the interfering device based on the usage information; determine channel state information associated with the CLI based on the number of spatial layers; and send the CLI feedback message indicating the channel state information.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the configuration may include operations, features, units, or instructions for performing the following operations: receiving an indication of the number of antenna ports for at least one reference signal resource in the at least one reference signal resource set together with the configuration.

[0014] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining that the configuration indicates a reference signal resource in the at least one reference signal resource set; determining, based on the configuration, the usage information for the reference signal resource including codebook-based usage; and determining, based on the codebook-based usage, the number of spatial layers of the CLI including the number of antenna ports for the reference signal resources in the at least one reference signal resource set.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining a reference signal resource set in the at least one reference signal resource set indicated by the configuration; selecting a reference signal resource from the reference signal resource set based on previously determined channel state information; determining usage information for the selected reference signal resource based on the configuration including codebook-based usage; and determining the number of spatial layers of the CLI including the number of antenna ports of the reference signal resource based on the codebook-based usage.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the configuration may include operations, features, units, or instructions for performing the following operations: receiving an indication of the number of spatial layers of the CLI associated with the interfering device together with the configuration.

[0017] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining, based on the configuration, that the usage information for the at least one reference signal resource set includes non-codebook-based usage and the number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources may be equal to or less than the number of spatial layers of the uplink transmission from the interfering device; and determining that the number of spatial layers of the CLI includes the number of reference signal resources based on the number of reference signal resources being equal to or less than the number of spatial layers and the non-codebook-based usage.

[0018] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining, based on the configuration, that the usage information for the at least one reference signal resource set includes non-codebook-based usage and the number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources may be greater than the number of spatial layers of the uplink transmission from the interfering device; and determining, based on the number of reference signal resources being greater than the number of spatial layers and the non-codebook-based usage, that the number of spatial layers of the CLI includes the number of spatial layers configured for the uplink transmission.

[0019] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: identifying a reference signal resource subset of the at least one reference signal resource set based on previous channel state information associated with each reference signal resource; determining, based on the configuration, that the usage information for the at least one reference signal resource set includes non-codebook based usage; and determining, for the reference signal resource subset, the channel state information associated with the CLI based on the non-codebook based usage and the number of spatial layers of the CLI.

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: identifying reference signal resources in the at least one reference signal resource set based on previous channel state information associated with each reference signal resource; determining the usage information for the at least one reference signal resource set based on the configuration including codebook-based usage; and determining the channel state information associated with the CLI for the reference signal resource based on the codebook-based usage and the number of spatial layers of the CLI.

[0021] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining, based on the configuration, that the usage information for the at least one reference signal resource set includes non-codebook based usage; and sending the CLI feedback message based on the non-codebook based usage, the CLI feedback message indicating the channel state information for a subset of reference signal resources in the at least one reference signal resource set.

[0022] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining, based on the configuration, that the usage information for the at least one reference signal resource set includes codebook-based usage; and sending the CLI feedback message based on the codebook-based usage, the CLI feedback message indicating the channel state information for the reference signal resources in the at least one reference signal resource set.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CLI feedback message indicates an SRS resource indicator (SRI) associated with the CLI.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CLI feedback message indicates an SRI based on the usage information for the at least one reference signal resource set including based on codebook usage.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CLI feedback message includes, based on the usage information for the at least one reference signal resource set, indicating a number of SRIs equal to the number of spatial layers of the CLI associated with the interfering device based on non-codebook usage.

[0026] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the configuration may be received in at least one of: an RRC message, or a medium access control (MAC) control element (CE), or a DCI, or a combination thereof.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the channel state information may be based on the UE operating in full-duplex communication with the interfering device.

[0028] A method of wireless communication at a base station is described. The method may include: determining, for CLI measurement by a UE of CLI from an interfering device, at least one reference signal resource set and usage information for the at least one reference signal resource set; sending a configuration for sending a CLI feedback message to the UE, the configuration indicating the at least one reference signal resource set to be monitored by the UE for CLI from the interfering device, the configuration also indicating the usage information for the at least one reference signal resource set; and receiving the CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information.

[0029] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: determine at least one reference signal resource set and usage information for the at least one reference signal resource set for CLI measurement by a UE of a CLI from an interfering device; send a configuration for sending a CLI feedback message to the UE, the configuration indicating the at least one reference signal resource set to be monitored by the UE for the CLI from the interfering device, the configuration also indicating the usage information for the at least one reference signal resource set; and receive the CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information.

[0030] Another apparatus for wireless communication at a base station is described. The apparatus may include means for determining, for a CLI measurement by a UE of a CLI from an interfering device, at least one reference signal resource set and usage information for the at least one reference signal resource set; sending a configuration for sending a CLI feedback message to the UE, the configuration indicating the at least one reference signal resource set to be monitored by the UE for the CLI from the interfering device, the configuration also indicating the usage information for the at least one reference signal resource set; and receiving the CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information.

[0031] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: determine at least one reference signal resource set and usage information for the at least one reference signal resource set for CLI measurement by a UE of a CLI from an interfering device; send a configuration for sending a CLI feedback message to the UE, the configuration indicating the at least one reference signal resource set to be monitored by the UE for CLI from the interfering device, the configuration also indicating the usage information for the at least one reference signal resource set; and receive the CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information.

[0032] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining that the usage information for the at least one reference signal resource set includes non-codebook based usage; and including an indication of the number of spatial layers in the configuration.

[0033] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining that the usage information for the at least one reference signal resource set includes codebook-based usage; and including in the configuration an indication of the number of antenna ports for at least one reference signal resource in the at least one reference signal resource set.

[0034] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining that there may be a set of interfering devices associated with the UE, each interfering device being associated with a corresponding set of reference signal resources having the same usage information; and combining the corresponding set of reference signal resources for each interfering device into the indication of the at least one reference signal resource set based on the same usage information.

[0035] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: identifying an interference level associated with at least one interfering device in the set of interfering devices based on the SRI and the associated CLI level indicated in the CLI message.

[0036] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the configuration indicating the usage information for the at least one reference signal resource set may include operations, features, units, or instructions for performing the following operations: receiving the CLI feedback message based on the non-codebook based usage, the CLI feedback message indicating the channel state information for a subset of reference signal resources in the at least one reference signal resource set.

[0037] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the configuration indicating the usage information for the at least one reference signal resource set may include operations, features, units, or instructions for performing the following operations: receiving the CLI feedback message based on the codebook-based usage, the CLI feedback message indicating the channel state information for the reference signal resources in the at least one reference signal resource set.

[0038] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the configuration may be sent in at least one of: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0039] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the channel state information may be based on the UE operating in full-duplex communication with the interfering device.

[0040] A method of wireless communication at an IAB node is described. The method may include: receiving a CSI report configuration from a parent IAB node for generating a CSI report associated with at least one CSI reference signal resource set monitored by the IAB node, the configuration further indicating usage information for the at least one CSI reference signal resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of a CLI associated with the parent IAB node based on the usage information; and receiving the CSI report from the downstream node indicating CSI associated with the CLI based on the number of spatial layers.

[0041] An apparatus for wireless communication at an IAB node is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: receiving a CSI report configuration for generating a CSI report associated with at least one CSI reference signal resource set monitored by the IAB node from a parent IAB node, the configuration also indicating usage information for the at least one CSI reference signal resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating the number of spatial layers of a CLI associated with the parent IAB node based on the usage information; and receiving the CSI report indicating CSI from the downstream node, the CSI associated with the CLI based on the number of spatial layers.

[0042] Another apparatus for wireless communication at an IAB node is described. The apparatus may include: means for receiving, from a parent IAB node, a CSI report configuration for generating a CSI report associated with at least one CSI reference signal resource set monitored by the IAB node, the configuration further indicating usage information for the at least one CSI reference signal resource set; means for sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of a CLI associated with the parent IAB node based on the usage information; and means for receiving, from the downstream node, the CSI report indicating CSI associated with the CLI based on the number of spatial layers.

[0043] A non-transitory computer-readable medium storing code for wireless communication at an IAB node is described. The code may include instructions executable by a processor to: receive from a parent IAB node a CSI reporting configuration for generating a CSI report associated with monitoring at least one CSI reference signal resource set by the IAB node, the configuration also indicating usage information for the at least one CSI reference signal resource set; send a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of a CLI associated with the parent IAB node based on the usage information; and receive from the downstream node the CSI report indicating CSI associated with the CLI based on the number of spatial layers.

[0044] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: identifying a number of interfering spatial layers based on the CSI report, the number of interfering spatial layers being equal to or less than a number of CSI reference signal ports associated with the at least one CSI reference signal resource set.

[0045] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for identifying a precoding matrix indicator associated with a number of interfering spatial layers based on the CSI report.

[0046] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: sending a second CSI report to the parent IAB node according to the CSI report configuration, the second CSI report indicating CSI obtained based on monitoring the at least one CSI reference signal resource set, the second CSI report indicating the CSI report received from the downstream node.

[0047] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the configuration may be received in at least one of: a radio resource control (RRC) message, or a MAC CE, or a DCI, or a combination thereof.

[0048] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CSI may be based on the IAB node operating in full-duplex communication with the downstream node.

[0049] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the downstream node includes a downstream IAB node or a UE.

[0050] A method for wireless communication at an IAB node is described. The method may include: sending an SRS measurement configuration to a parent IAB node for measuring a CLI by the parent IAB node on at least one reference signal resource set to be used by a downstream node when sending an SRS, the configuration also indicating a number of spatial layers of the CLI associated with the downstream node based on usage information for the at least one reference signal resource set; sending an SRS transmission configuration to the downstream node indicating the at least one reference signal resource set to be used when sending the SRS, the configuration indicating the usage information for the at least one reference signal resource set; and receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being based on the CLI determined by the measurement from the SRS and based on the number of spatial layers.

[0051] An apparatus for wireless communication at an IAB node is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: send an SRS measurement configuration for measuring a CLI on at least one reference signal resource set to be used by a downstream node when sending an SRS to a parent IAB node, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based on usage information for the at least one reference signal resource set; send an SRS transmission configuration indicating the at least one reference signal resource set to be used when sending the SRS to the downstream node, the configuration indicating the usage information for the at least one reference signal resource set; and receive an uplink resource configuration from the parent IAB node, the uplink resource configuration being based on the CLI determined by the measurement according to the SRS and based on the number of spatial layers.

[0052] Another apparatus for wireless communication at an IAB node is described. The apparatus may include: a unit for sending an SRS measurement configuration to a parent IAB node for measuring a CLI on at least one reference signal resource set to be used by a downstream node when sending an SRS by the parent IAB node, the configuration also indicating a number of spatial layers of the CLI associated with the downstream node based on usage information for the at least one reference signal resource set; a unit for sending an SRS transmission configuration to the downstream node indicating the at least one reference signal resource set to be used when sending the SRS, the configuration indicating the usage information for the at least one reference signal resource set; and a unit for receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being based on the CLI determined by the measurement from the SRS and based on the number of spatial layers.

[0053] A non-transitory computer-readable medium storing code for wireless communication at an IAB node is described. The code may include instructions executable by a processor to perform the following operations: sending an SRS measurement configuration to a parent IAB node for measuring a CLI on at least one reference signal resource set to be used by a downstream node when sending an SRS by the parent IAB node, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based on usage information for the at least one reference signal resource set; sending an SRS transmission configuration to the downstream node indicating the at least one reference signal resource set to be used when sending the SRS, the configuration indicating the usage information for the at least one reference signal resource set; and receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being based on the CLI determined from the SRS by the measurement and based on the number of spatial layers.

[0054] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the SRS measurement configuration may be sent in at least one of: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0055] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CSI may be based on the IAB node operating in full-duplex communication with the downstream node. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 An example of a system for wireless communications supporting channel state reporting based on sounding reference signal resource usage in full-duplex in accordance with aspects of the present disclosure is shown.

[0057] Figure 2An example of a wireless communication system supporting channel state reporting based on sounding reference signal resource usage in full-duplex in accordance with aspects of the present disclosure is shown.

[0058] Figure 3 An example of a process for supporting channel state reporting based on sounding reference signal resource usage in full-duplex in accordance with aspects of the present disclosure is shown.

[0059] Figure 4 An example of a process for supporting channel state reporting based on sounding reference signal resource usage in full-duplex in accordance with aspects of the present disclosure is shown.

[0060] Figure 5 An example of a process for supporting channel state reporting based on sounding reference signal resource usage in full-duplex in accordance with aspects of the present disclosure is shown.

[0061] Figure 6 An example of a process for supporting channel state reporting based on sounding reference signal resource usage in full-duplex in accordance with aspects of the present disclosure is shown.

[0062] Figure 7 and Figure 8 A block diagram of an apparatus supporting channel state reporting based on sounding reference signal resource usage in full-duplex is shown in accordance with aspects of the present disclosure.

[0063] Fig. 9 A block diagram of a communications manager supporting channel state reporting based on sounding reference signal resource usage in full-duplex is shown in accordance with aspects of the present disclosure.

[0064] Fig.10 A schematic diagram of a system including a device supporting channel state reporting based on sounding reference signal resource usage in full-duplex is shown in accordance with aspects of the present disclosure.

[0065] Fig.11 and Fig.12 A block diagram of an apparatus supporting channel state reporting based on sounding reference signal resource usage in full-duplex is shown in accordance with aspects of the present disclosure.

[0066] Fig.13 A block diagram of a communications manager supporting channel state reporting based on sounding reference signal resource usage in full-duplex is shown in accordance with aspects of the present disclosure.

[0067] Fig.14 A schematic diagram of a system including a device supporting channel state reporting based on sounding reference signal resource usage in full-duplex is shown in accordance with aspects of the present disclosure.

[0068] Figures 15 to 21 A flow chart illustrating a method of supporting channel state reporting based on sounding reference signal resource usage in full-duplex according to aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0069] Cross-link interference (CLI), which may include user equipment (UE) to UE interference, may use a sounding reference signal (SRS) transmission from an interfering device (e.g., an aggressor UE) that is used by a victim UE (e.g., an interfered UE) to perform channel state information (CSI) measurements and reporting. For example, a victim UE may receive an indication of an SRS resource set being used by an interfering device and use that information to measure the SRS transmissions from the interfering device. The results of the measurement are provided to a base station in a feedback message. However, since these UEs are typically associated with different cells, the backhaul data exchange rate may not support or comply with various latency / reliability requirements associated with some wireless communications. In addition, such techniques typically do not support configuring the victim UE with usage information for an SRS resource set for an interfering device, which may limit the integrity / accuracy of the CSI reporting. Therefore, such techniques may be limited to long-term interference management.

[0070] Various aspects of the present disclosure are first described in the context of a wireless communication system. In summary, the described technology provides a base station to send a CSI report configuration message to a UE (e.g., a victim UE that experiences a CLI from an aggressor device). The message may carry or otherwise indicate at least one SRS resource set (e.g., in which the aggressor device sends its SRS) and usage information of the SRS resource set, such as beam management information, codebook and non-codebook, antenna switching information, etc. If the usage information for the SRS resource set is non-codebook usage, the base station may indicate the number of spatial layers of the aggressor device. The UE (which may be operating in a full-duplex communication mode) determines the number of spatial layers of the CLI based on the indicated SRS resource set and the corresponding usage information. For example, if the use of the SRS resource set is non-codebook, the number of spatial layers may be equal to the indicated number of physical uplink shared channel (PUSCH) spatial layers. As another example, if the use of the SRS resource set is codebook, the number of spatial layers may be equal to the number of antenna ports of the SRS resources in the SRS resource set. Therefore, the UE may determine and report the CSI value of its full-duplex mode communication (eg, in a CLI feedback message) based on the determined number of spatial layers.

[0071] In some aspects of the described technology, such channel state reports may be employed within an integrated access and backhaul network (IAB) network. The IAB network may include an anchor node having a connection to a core network, one or more IAB nodes forming a link within the IAB network, and one or more UEs associated with at least a portion of the IAB node. Broadly speaking, the IAB network provides a backhaul connection to the core network for the UE via one or more intermediate IAB nodes to the anchor IAB node. In some aspects, each IAB node may include a distributed unit (DU) functional unit that manages various aspects of a wireless backhaul link between the IAB node and a parent IAB node (which may be only an upstream IAB node or may be an anchor IAB node) and between the IAB node and a downstream IAB node (which may be referred to as a child IAB node). In addition, each IAB node may also include a mobile terminal (MT) functional unit that manages various aspects of a wireless access link between the IAB node and one or more associated UEs (which may also be considered as downstream nodes in this context).

[0072] For example, a parent IAB node may send or otherwise transmit a CSI reporting configuration to an IAB node (e.g., a node between a parent IAB of a downstream IAB node within an IAB network). In general, a CSI reporting configuration may generally carry or otherwise transmit information identifying how an IAB node generates a CSI report based on monitoring a CSI reference signal (CSI-RS) transmission from a parent IAB node. In some aspects, a CSI reporting configuration may also carry or otherwise transmit usage information for a CSI-RS resource set (e.g., information identifying the use of a CSI-RS transmission). Based on the CSI reporting configuration, the IAB node may send or otherwise provide a CSI resource configuration to a downstream node (which may be only a downstream IAB node served by a DU functional unit or may be a UE served by an MT functional unit). A parent IAB node may send a CSI-RS according to a CSI-RS resource set, and the IAB node may monitor the CSI-RS to determine the CSI for the parent IAB node. However, the downstream IAB node may also receive a CSI-RS transmission from the parent IAB node (which may be a CLI from the perspective of the downstream node) and determine (e.g., based on a CSI resource configuration provided to the downstream IAB node) CSI information (e.g., CLI information) for the parent IAB node. Thus, the downstream IAB node may send or otherwise provide a CSI report to the IAB node indicating CSI information for the parent node. That is, the CSI for the parent node may be associated with a CLI based on the number of spatial layers associated with the parent IAB node. Thus, the IAB node may identify or otherwise determine the number of interfering spatial layers associated with the parent IAB node, which may be equal to or less than the number of CSI-RS ports associated with the CSI-RS resource set.

[0073] In addition, such technology can be used in upstream scenarios within the IAB network. For example, the IAB node can send or otherwise provide an SRS measurement configuration to the parent IAB node. In a broad sense, the SRS measurement configuration can provide information to be used by the parent IAB node to measure the CLI on the reference signal resource set (e.g., SRS resource set) to be used by the downstream node to send SRS. The SRS measurement configuration can also identify or otherwise indicate the number of spatial layers of the CLI associated with the downstream node (e.g., based on the usage information of the reference signal resource). The IAB node can also send or otherwise provide an SRS transmission configuration to the downstream node, which carries or otherwise transmits information identifying the reference signal resource set to be used by the downstream node to send SRS. The SRS transmission configuration can also carry or otherwise transmit information identifying the usage information of the reference signal resource. The downstream IAB node sends the SRS according to the SRS transmission configuration, and the IAB node can use the SRS to determine the channel state of the link between the IAB nodes in the downstream node. However, the parent IAB node can also receive and measure the SRS transmission of the downstream IAB node. Again, this can provide an indication of the CLI to the parent IAB node based on the channel state of the link between the IAB node and its downstream IAB node. Therefore, the parent IAB node can also identify or otherwise determine the amount of interference (e.g., channel state / CLI interference) and make scheduling decisions for the IAB node and / or the downstream IAB node. The parent IAB node can send or otherwise provide uplink resource configuration (e.g., physical uplink control channel (PUCCH) and / or PUSCH resource configuration) based on the CLI determined by the parent IAB node measuring the SRS transmission of the downstream IAB node. Again, this can be based on usage information (e.g., the number of spatial layers of the CLI associated with the downstream IAB node).

[0074] Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow diagrams relating to channel state reporting based on sounding reference signal resource usage in full-duplex.

[0075] Figure 1An example of a wireless communication system 100 that supports channel state reporting based on the use of sounding reference signal resources in full-duplex according to various aspects of the present disclosure is shown. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an improved LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, or communications with low-cost and low-complexity devices, or any combination thereof.

[0076] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100, and may be devices of different forms or capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support transmission of signals according to one or more radio access technologies.

[0077] UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, mobile, or both at different times. UEs 115 may be devices of different forms or with different capabilities. Figure 1 Some example UEs 115 are shown in FIG. 1. The UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul network (IAB) nodes, or other network devices), such as Figure 1 shown.

[0078] The base stations 105 may communicate with the core network 130, or communicate with each other, or perform both operations. For example, the base stations 105 may be connected to the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3 or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) on the backhaul links 120 (e.g., via X2, Xn or other interfaces), or communicate with each other indirectly (e.g., via the core network 130), or perform both operations. In some examples, the backhaul links 120 may be or include one or more wireless links.

[0079] One or more of the base stations 105 described herein may include or may be referred to by those skilled in the art as a base station transceiver, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B or a Gigabit Node B (either of which may be referred to as a gNB), a Home Node B, a Home Evolved Node B, or other appropriate terminology.

[0080] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other appropriate terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. 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, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, among other examples, which may be implemented in various items such as appliances, or vehicles, meters, and among other examples.

[0081] The UE 115 described herein is capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network devices, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, such as Figure 1 shown.

[0082] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating operations for the carrier, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers.

[0083] In some examples (e.g., in a carrier aggregation configuration), a carrier may also 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 Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be placed according to a channel grid to be discovered by a UE 115. A carrier may operate in a standalone mode, where a UE 115 performs initial acquisition and connection via a carrier, or a carrier may operate in a non-standalone mode, where a different carrier (e.g., of the same or different radio access technology) is used to anchor the connection.

[0084] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in TDD mode).

[0085] A carrier may be associated with a particular bandwidth of a radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a number of determined bandwidths for a carrier of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communication system 100 (e.g., base stations 105, UEs 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., subband, BWP) or all of the carrier bandwidth.

[0086] The signal waveform transmitted on the carrier may be composed of multiple subcarriers (e.g., using multicarrier 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 include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, wherein the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate for the UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communication with the UE 115.

[0087] One or more numerologies for a carrier may be supported, where the numerologies may include subcarrier spacing (Δf) and cyclic prefixes. A carrier may be divided into one or more BWPs with the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications for a UE 115 may be limited to the one or more active BWPs.

[0088] The basic time unit (which may be referred to as T s =1 / (Δf max ·N f ) seconds sampling period, where Δf max It can represent the maximum supported subcarrier spacing, and N f The time intervals for the base station 105 or the UE 115 may be expressed as multiples of a maximum supported discrete Fourier transform (DFT) size). The time intervals of the communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0089] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of symbol periods (e.g., depending on the length of a cyclic prefix added in front of each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of micro-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0090] A subframe, a time slot, a mini-time slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in the form of bursts of shortened TTIs (sTTIs)).

[0091] Physical channels may be multiplexed on a carrier according to various techniques. For example, one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique may be used to multiplex physical control channels and physical data channels on a downlink carrier. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by the number of symbol periods and may extend across the system bandwidth of a carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a group of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0092] Each base station 105 can provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots or other types of cells, or any combination thereof). The term "cell" can refer to a logical communication entity used to communicate with the base station 105 (e.g., on a carrier), and can be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID) or other identifier) ​​for distinguishing adjacent cells. In some examples, a cell can also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. Depending on various factors (such as the capabilities of the base station 105), the range of such a cell can range from a smaller area (e.g., a structure, a subset of a structure) to a larger area. For example, a cell can be or include a building, a subset of a building, or an external space between or overlapping geographic coverage areas 110, as well as other examples.

[0093] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by a UE 115 with a service subscription to a network provider that supports the macro cell. A small cell may be associated with a lower power base station 105 than a macro cell, and the small cell may operate in the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to a UE 115 with a service subscription to a network provider, or may provide restricted access to a UE 115 associated with a small cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 associated with a user in a residence or office). A base station 105 may support one or more cells, and may also support the use of one or more component carriers to communicate on one or more cells.

[0094] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0095] In some examples, the base stations 105 may be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for respective geographic coverage areas 110 using the same or different radio access technologies.

[0096] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and in some examples, transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operation.

[0097] Some UEs 115 (e.g., MTC or IoT devices) may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents the information to a human interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

[0098] Some UEs 115 may be configured to employ an operating mode that reduces power consumption, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception rather than transmission and reception simultaneously). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power saving techniques for UE 115 include entering a power-saving deep sleep mode when not participating in active communications, when operating on a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0099] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication, and can be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably in this article.

[0100] In some examples, UE 115 may also be able to communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, wherein each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0101] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these items. Vehicles can use signals to send information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in a V2X system can communicate with roadside infrastructure (such as roadside units), or communicate with a network via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communication, or both.

[0102] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connection, and other access, routing or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function unit (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function unit (UPF)) for routing packets to an external network or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UE 115 served by a base station 105 associated with the core network 130. User IP packets may be transmitted through a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0103] Some of the network devices (e.g., base stations 105) may include subcomponents such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with the UE 115 through one or more other access network transport entities 145 (which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs)). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or merged into a single network device (e.g., base station 105).

[0104] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to 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, but the waves may be sufficient to penetrate structures for macro cells to provide service to UEs 115 located indoors. Transmissions on UHF waves may be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0105] The wireless communication system 100 may also operate in a super high frequency (SHF) region using a frequency band from 3 GHz to 30 GHz (also referred to as a centimeter band) or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as a millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between UE 115 and base station 105, and the EHF antennas of the corresponding devices may be even smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, compared to SHF or UHF transmissions, the propagation of EHF transmissions may suffer from even greater atmospheric attenuation and shorter distances. The technology disclosed herein may be employed across transmissions using one or more different frequency regions, and the designated use of frequency bands across these frequency regions may differ according to countries or regulatory agencies.

[0106] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as the 5 GHz industrial, scientific, and medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) can employ carrier sensing for conflict detection and avoidance. In some examples, operations in unlicensed bands can be based on a carrier aggregation configuration in combination with component carriers operating in a licensed band (e.g., LAA). Operations in the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, as well as other examples.

[0107] The base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels (which may support MIMO operations or transmit or receive beamforming). For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having antenna ports of a number of rows and columns that the base station 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals sent via the antenna ports.

[0108] The base station 105 or UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technology may be referred to as spatial multiplexing. For example, a transmitting device may send multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[0109] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to form or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array so that some signals propagating in a specific orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements may be defined by a set of beamforming weights associated with a specific orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0110] As part of the beamforming operation, the base station 105 or the UE 115 may use beam scanning techniques. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communications with the UE 115. The base station 105 may send some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions. For example, the base station 105 may send signals based on different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by a transmitting device (such as the base station 105) or by a receiving device (such as the UE 115)) to identify a beam direction for subsequent transmission or reception by the base station 105.

[0111] Base station 105 may transmit some signals (e.g., data signals associated with a particular receiving device (e.g., UE 115)) in a single beam direction (e.g., a direction associated with the receiving device). In some examples, the beam direction associated with transmission along the single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 having the highest signal quality or otherwise acceptable signal quality.

[0112] In some examples, transmissions by a device (e.g., by a base station 105 or a UE 115) may be performed using multiple beam directions, and the device may generate a combined beam for transmission (e.g., from the base station 105 to the UE 115) using a combination of digital precoding or radio frequency beamforming. The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may send reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)) that may be precoded or not precoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type of codebook, a linear combination type of codebook, a port selection type of codebook). Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques to send signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to send signals in a single direction (e.g., to send data to a receiving device).

[0113] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, the receiving device (e.g., UE 115) can try multiple reception configurations (e.g., directional listening). For example, the receiving device can try multiple reception directions by receiving via different antenna subarrays, by processing the received signals according to different antenna subarrays, by receiving according to different reception beamforming weight sets applied to the signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets), or by processing the received signals according to different reception beamforming weight sets applied to the signals received at multiple antenna elements of the antenna array (any of the above operations may be referred to as "listening" according to different reception configurations or reception directions). In some examples, the receiving device can use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

[0114] The wireless communication system 100 may be a packet-based network operated according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly to transmit on a logical channel. The medium access control (MAC) layer may perform priority handling and multiplexing of logical channels to transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of an RRC connection (which supports radio bearers for user plane data) between a UE 115 and a base station 105 or a core network 130. At the physical layer, transport channels may be mapped to physical channels.

[0115] UE 115 and base station 105 can support retransmission of data to increase the possibility that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technology for increasing the possibility that data is correctly received on communication link 125. HARQ can include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC) and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput at the MAC layer under poor radio conditions (e.g., low signal and noise conditions). In some examples, the device can support same-slot HARQ feedback, wherein the device can provide HARQ feedback for data received in previous symbols in the slot in a specific slot. In other cases, the device can provide HARQ feedback in subsequent slots or according to some other time interval.

[0116] The UE 115 may receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE 115 for CLI from the interfering device, the configuration further indicating usage information for the at least one reference signal resource set. The UE 115 may determine a number of spatial layers of the CLI associated with the interfering device based at least in part on the usage information. The UE 115 may determine channel state information associated with the CLI based at least in part on the number of spatial layers. The UE 115 may send a CLI feedback message indicating the channel state information.

[0117] The base station 105 may determine at least one reference signal resource set and usage information for the at least one reference signal resource set for CLI measurement by the UE 115 of the CLI from the interfering device. The base station 105 may send a configuration for sending a CLI feedback message to the UE 115, the configuration indicating at least one reference signal resource set to be monitored by the UE 115 for the CLI from the interfering device, the configuration also indicating usage information for the at least one reference signal resource set. The base station 105 may receive a CLI feedback message from the UE 115 indicating channel state information associated with the CLI, the channel state information being based on the usage information.

[0118] An IAB node (e.g., a base station 105 and / or a UE 115 within an IAB network) may receive, from a parent IAB node, a CSI report configuration for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node, the configuration also indicating usage information for the at least one CSI-RS resource set. The IAB node may send a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of a CLI associated with the parent IAB node based at least in part on the usage information. The IAB node may receive a CSI report indicating channel state information from a downstream node, the CSI associated with the CLI based at least in part on the number of spatial layers.

[0119] The IAB node (e.g., a base station 105 and / or a UE 115 within the IAB network) may send, to a parent IAB node, an SRS measurement configuration for the parent IAB node to measure the CLI on at least one reference signal resource set to be used by the downstream node when transmitting the SRS, the configuration also indicating a number of spatial layers of the CLI associated with the downstream node based at least in part on usage information for the at least one reference signal resource set. The IAB node may send, to the downstream node, an SRS transmission configuration indicating at least one reference signal resource set to be used when transmitting the SRS, the configuration indicating usage information for the at least one reference signal resource set. The IAB node may receive an uplink resource configuration from the parent IAB node, the uplink resource configuration being based at least in part on measuring the CLI determined from the SRS and at least in part on the number of spatial layers. Figure 2An example of a wireless communication system 200 that supports channel state reporting based on the use of sounding reference signal resources in full duplex according to various aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement various aspects of the wireless communication system 100. The wireless communication system 200 may include a base station 205, a UE 210, and a UE 215, which may be examples of corresponding devices described herein. In some aspects, the UE 210 may be a victim UE (e.g., a downlink UE), and the UE 215 may be an aggressor UE (e.g., an uplink UE). Although the UE 215 is generally described as an aggressor UE, an interfering device, etc., it should be understood that interference may come from different devices.

[0120] In some aspects, the wireless communication system 200 may support or otherwise be configured for full-duplex communication. For example, a 5G wireless network (such as the wireless communication system 200) may provide ultra-high data rate communications that support a wide range of application scenarios. Wireless full-duplex (FD) communication is an emerging technology and may double the link capacity. This may include enabling a radio network node to simultaneously transmit and receive at the same time-frequency resource (or only the same time resource, for example, in an FDM manner). A full-duplex network node (such as a base station 205 in a cellular network) may use the same radio resources to communicate simultaneously with two half-duplex terminals (e.g., UE 210 and UE 215) in an uplink (UL) and a downlink (DL). Another typical wireless full-duplex application scenario is in a wireless backhaul network (such as an integrated access and backhaul network (IAB) network). In an IAB network, a relay node (e.g., an IAB node) can communicate with an anchor node (e.g., upstream using a backhaul link) and a mobile terminal (e.g., downstream using an access link) simultaneously in a single-hop scenario, or communicate with two other relay nodes (e.g., upstream and downstream using an access link in a multi-hop scenario) simultaneously. Full-duplex can significantly improve system throughput for various applications in wireless communication networks by doubling the capacity of each single link, and can also reduce transmission delays for time-critical services.

[0121] Wireless communication system 200 shows an example of a cellular system using full-duplex communication. A full-duplex network node (such as a base station 205 in a cellular network) can communicate with two UEs (e.g., UE 210 and UE 215) simultaneously in the uplink and downlink using the same radio resources. With full-duplex technology, the downlink of one UE (e.g., UE 210) and the uplink of another UE (e.g., UE 215) can coexist in the same radio spectrum at the same time in a cell. In the uplink, UE 215 sends a signal to base station 205 via link 225. In the downlink, UE 210 receives a signal from base station 205 via link 220. In full-duplex, a UE (e.g., UE 215) sending an uplink signal generates inter-UE interference (e.g., CLI 230) to a UE (e.g., UE 210) receiving a downlink signal.

[0122] In the example of an IAB wireless network, one IAB node may be considered a relay node (e.g., in this example, UE 215) through which data may be sent from an IAB donor (e.g., base station 205 or some other anchor node) to UE 210 (in this IAB example) or from UE 210 to the IAB donor. In full-duplex technology, an IAB node (e.g., in this example, UE 215) may receive data from an IAB donor (e.g., in this example, base station 205) and send the data to UE 210, or an IAB node (e.g., in this example, UE 215) may receive data from a UE 210 and send the data to the IAB donor using the same time-frequency radio resources. Similar to the Uu interface, at the IAB node (e.g., in this example, UE 210), interference from the backhaul link to the access link (e.g., in this example, from the IAB donor to the UE 210) or interference from the access link to the backhaul link (from the UE 210 to the IAB donor) may cause data reception performance degradation. It should be noted that the UE 210 may be another IAB node. In such a case, the link between the IAB donor (e.g., base station 205) and the IAB node (e.g., UE 215) is referred to as a parent link, and the link between the IAB node (e.g., UE 215) and another IAB node (e.g., UE 210) is referred to as a child link. Therefore, the parent link and the child link may interfere with each other.

[0123] In a cell where full-duplex communication is activated, a downlink UE (e.g., UE 210) may be subject to co-channel interference (e.g., CLI 230) from a paired uplink UE (e.g., UE 215). The interference strength depends on the distance between the two UEs and also on the uplink transmit beamforming implemented by the uplink UE (e.g., UE 215). If the downlink UE has more than one receive antenna and performs coherent antenna reception, the interference strength also depends on the spatial direction of the interfering signal (e.g., CLI 230).

[0124] CLI processing provides a method in which a UE in one cell (e.g., UE 210) can measure interference from UEs in other cells (e.g., UE 215). Due to the good multiplexing capability of SRS transmissions, the network (e.g., via base station 205) configures a set of SRS resources to both the victim UE (e.g., UE 210) and the aggressor UE (e.g., UE 215). In these SRS resources, the victim UE can be configured to measure the strength of the SRS transmission sent by the aggressor UE in the neighboring cell. Since the two UEs are located in two different cells, considering the backhaul data rate and latency constraints, the victim UE may only report layer 3 measurement results, i.e., values ​​of SRS reference signal received power (RSRP), CLI reference signal strength indicator (RSSI), etc., which are generated based on the results of long-term measurements (e.g., measurements spanning a duration of tens or even hundreds of time slots).

[0125] In order to implement such inter-cell SRS measurement, information about SRS configuration needs to be transmitted via the backhaul between the base stations of the victim cell and the aggressor cell. Due to the limitation on the backhaul transmission delay, such information transmission may only adopt static or semi-static mode, and accordingly, SRS measurement may only be configured in static or semi-static mode. Therefore, such CLI technology may only be used for long-term interference management, for example, allocating non-overlapping radio resources to the aggressor UE and the victim UE, which is limited by the system capacity compared with radio resource reuse.

[0126] According to such technology, the base station 205 will send an SRS configuration message for SRS transmission to the UE 215, which includes the configuration of multiple SRS resource sets. Each SRS resource set includes multiple SRS resources, and all SRS resources have the same parameter "usage" (e.g., usage information). Examples of usage information include, but are not limited to, beam management (e.g., beamManagement), codebook, non-codebook (e.g., nonCodebook), antenna switching (e.g., antennaSwitching). Beam management generally indicates that the resource set is used for beam management of uplink beamforming (e.g., UE 215 sends SRS in multiple SRS resources in the SRS resource set, and each SRS resource has a corresponding uplink beam direction). The codebook generally indicates that the SRS resource set is used for uplink channel estimation of precoded SRS. The UE 215 can be configured with multiple SRS resources in the SRS resource set, each of which has 1, 2 or 4 antenna ports. UE 215 may send an SRS transmission, precoding the SRS transmission at an antenna port using certain precoding weights at one SRS resource. Non-codebook generally indicates that the SRS resource set is used for uplink channel estimation of non-precoded SRS. UE 215 may be configured with multiple (e.g., the same number as antenna ports) SRS resources in the SRS resource set, at each SRS resource, the UE uses one antenna port for transmission. Antenna switching generally indicates that when there are fewer transmit antennas than receive antennas, the resource set is used for uplink channel estimation (e.g., UE 215 sends SRS from corresponding transmit antenna ports in sequence at different locations of the configured radio resources).

[0127] However, this approach may lead to various problems regarding CLI processing. As described above, the base station 205 may instruct a downlink UE (e.g., IE 210 or victim UE) operating in full-duplex mode to measure inter-UE interference (e.g., CLI 230) based on SRS reception, and then the downlink UE adds an SRS resource indicator (SRI) in its CSI report 240 to indicate the selection of a matching uplink UE (e.g., UE 215 or aggressor UE) and its beam. By doing so, the base station 205 can schedule appropriate downlink UEs (e.g., UE 210 or victim UE) and uplink UEs (e.g., UE 215 or aggressor UE), and determine their transmission formats (transmission beams, MIMO schemes, MCS values, etc.). However, such techniques cannot distinguish between situations where the SRS resource sets of the uplink UE have different uses (e.g., different usage information). That is, such techniques may configure UE210 with the SRS resource set of UE 215, but do not indicate the usage information for such SRS resource set. Different uses correspond to different beamforming operations for the PUSCH of the uplink UE (e.g., UE 215) associated with the SRS resource set. If the uplink UE is requested to send periodic, semi-persistent (e.g., through RRC signaling, MAC CE), or non-periodic SRS (e.g., through DCI formats 0-1, 0-2, 1-1, 1-2), and if the usage information of the triggered SRS resource set is non-codebook, the uplink UE sends SRS at some or all SRS resources in the SRS resource set. Then, the following non-codebook-based PUSCH uses the beam direction of min(L_max, N_SRS) SRS resources from the SRS resource set, where L_max is the maximum number of spatial layers for PUSCH, and N_SRS is the number of SRS resources in the SRS resource set. If the usage of the triggered SRS resource set is codebook, the uplink UE sends its SRS at some or all SRS resources in the SRS resource set. Then, the following codebook-based PUSCH uses the beam direction of one SRS resource from the SRS resource set.

[0128] In an example of another problem surrounding such techniques, a downlink UE (e.g., UE 210) operating in full-duplex mode cannot know how many SRS resources the inter-UE interference (e.g., CLI 230) comes from. Without this information, the downlink UE cannot select the correct matching uplink UE and cannot determine accurate CSI based on the inter-UE interference assumption. For example, if a downlink UE reports CSI with too many associated SRS resources, the base station 205 may schedule an excessively small MCS value for the PDSCH based on the CSI report, and therefore, the downlink spectrum efficiency may be reduced. As another example, if a downlink UE reports CSI with too few associated SRS resources, the base station 205 may schedule an excessively large MCS value for the PDSCH based on the CSI report, and therefore, the actual inter-UE interference at the PDSCH may cause PDSCH decoding errors.

[0129] Thus, aspects of the described techniques may include the base station 205 indicating to the UE 210 usage information for an SRS resource set for the UE 215 to support CLI processing. For example, the base station 205 may send or otherwise communicate to the UE 210 a configuration 235 for sending a CLI feedback message. The configuration 235 may identify or otherwise indicate a reference signal resource set (e.g., an SRS resource set) for the UE 210 to monitor for CLI 230 from an interfering device (e.g., in this example, the UE 215). The configuration 235 may also identify or otherwise indicate usage information for the reference signal resource set (e.g., usage information for the SRS resource set configured for the UE 215).

[0130] Therefore, the base station 205 sends a CSI report configuration message (e.g., configuration 235) to the UE 210 (e.g., in this example, a victim UE), which indicates at least one SRS resource set in which the UE 215 (e.g., in this example, an aggressor UE or an interfering device) sends SRS and the use of the SRS resource set. If the indicated use of the SRS resource set is non-codebook, the base station 205 may also indicate the number of PUSCH spatial layers of the UE 215. The message (e.g., configuration 235) may be sent via a layer 3 (e.g., RRC layer) message, a MAC CE, a DCI, or any combination.

[0131] In some aspects, since the number of antenna ports of the SRS resource can be statically configured by RRC signaling, the number of PUSCH spatial layers of inter-UE interference (e.g., the number of spatial layers of CLI 230) can be a static value of the SRS resource whose usage information corresponds to the codebook. Therefore, the base station 205 can indicate the number of antenna ports of the SRS resource to the UE 210 through RRC signaling or MAC CE, for example, in the configuration 235 message of the periodic or semi-periodic CSI report configuration. That is, the UE 210 can receive an indication of the number of antenna ports of at least one reference signal resource (e.g., SRS resource) in the reference signal resource set (e.g., SRS resource set) together with the configuration 235.

[0132] In some aspects, since the number of spatial layers of the UE 215 PUSCH can be dynamically configured by DCI, the number of spatial layers of the inter-UE interference (e.g., CLI 230) can be a dynamic value of the SRS resource set whose use is non-codebook. Therefore, the base station 205 can indicate the number of spatial layers of the UE 215 PUSCH to the UE 210 through DCI, for example, in the configuration 230 message of the non-periodic CSI reporting configuration. That is, the UE 210 can receive an indication of the number of spatial layers of the CLI 230 associated with the interfering device (e.g., UE 215) together with the configuration 235.

[0133] Based on the usage information indicated in the configuration 235, the UE 210 can identify or otherwise determine the number of spatial layers of the CLI 230 associated with the interfering device (e.g., in this example, the UE 215). In at least some aspects, the UE 210 can determine the channel state information (e.g., CSI) of the CLI 230 based on the number of spatial layers of the CLI 230.

[0134] In some aspects, the UE 210 may determine the number of spatial layers of inter-UE interference (e.g., CLI 230) when operating in full-duplex mode, for example, based at least in part on the indicated use of an SRS resource set. If the use of the SRS resource set is non-codebook, the number of spatial layers of the inter-UE interference (e.g., the number of spatial layers of the CLI 230) may be equal to the indicated (e.g., in configuration 235) number of PUSCH spatial layers. If the use of the SRS resource set is codebook, the number of spatial layers of the inter-UE interference (e.g., the number of spatial layers of the CLI 230) may be equal to the number of antenna ports of the SRS resources in the SRS resource set. If an SRS resource indicator (SRI) is associated with a CSI value, the number of spatial layers of the inter-UE interference may be equal to the number of antenna ports of the SRS resources corresponding to the SRI.

[0135] That is, based on the CSI report configuration message (e.g., configuration 235), the UE 210 may determine the number of spatial layers of the inter-UE interference (e.g., CLI 230) in full-duplex mode. If the base station 205 indicates the SRS resources whose usage is the codebook as the assumed interference and also indicates the number of antenna ports thereof, the UE 210 uses the number of antenna ports as the number of spatial layers of the inter-UE interference in full-duplex mode. Therefore, the UE 210 may determine that the configuration 235 indicates the reference signal resources in the at least one reference signal resource set. The UE 210 may determine, at least in part based on the configuration 235, that the usage information for the reference signal resources is based on the usage of the codebook. Therefore, the UE 210 may determine, at least in part based on the usage based on the codebook, that the number of spatial layers of the CLI is the number of antenna ports of the reference signal resources in the at least one reference signal resource set.

[0136] If the base station 205 indicates multiple SRS resources whose usage is a codebook as assumed interference and also indicates the number of antenna ports thereof, the UE 210 selects the SRS resource (e.g., the SRS resource with the minimum interference strength) as a paired uplink transmission in full-duplex mode. Then, the UE 210 determines the number of antenna ports of the SRS resource as the number of spatial layers of the inter-UE interference (e.g., CLI 230) in full-duplex mode. Therefore, the UE 210 can determine that the configuration 235 indicates multiple reference signal resources in at least one reference signal resource set. The UE 210 can select the reference signal resource from the multiple reference signal resources based at least in part on the previously determined channel state information. The UE 210 can determine at least in part based on the configuration 235 that the usage information for the selected reference signal resource is based on the usage of the codebook. The UE 210 can determine at least in part based on the usage of the codebook that the number of spatial layers of the CLI is the number of antenna ports of the reference signal resource.

[0137] If the base station 205 indicates one or more SRS resources whose usage is non-codebook as hypothetical interference and the number of these SRS resources is not greater than the indicated number of spatial layers of the PUSCH of the UE 215, the UE 210 determines the number of these SRS resources as the number of spatial layers of the inter-UE interference (e.g., CLI 230) in full-duplex mode. As discussed, this can include the base station 205 indicating the number of spatial layers in the configuration 235. Therefore, the UE 210 can determine, at least in part based on the configuration 235, that the usage information for at least one reference signal resource set is based on the use of non-codebook and the number of reference signal resources in the at least one reference signal resource set. The UE 210 can determine that the number of reference signal resources is equal to or less than (e.g., not greater than) the number of spatial layers of the uplink transmission (e.g., PUSCH of the UE 215) from the interfering device. The UE 210 can determine that the number of spatial layers of the CLI 230 is the number of reference signal resources based at least in part on the number of reference signal resources being equal to or less than the number of spatial layers and based on the use of non-codebook.

[0138] If the base station 205 indicates one or more SRS resources whose usage is non-codebook as hypothetical interference and the number of these SRS resources is greater than the indicated number of spatial layers of the UE 215 PUSCH, the UE 210 determines the number of spatial layers of the UE 215 PUSCH as the number of spatial layers of the inter-UE interference (e.g., CLI 230) in full-duplex mode. As discussed, this can include the base station 205 indicating the number of spatial layers in the configuration 235. Therefore, the UE 210 can determine, at least in part based on the configuration 235, that the usage information for at least one reference signal resource set is based on the use of non-codebook and the number of reference signal resources in the at least one reference signal resource set. The UE 210 can determine that the number of reference signal resources is greater than the number of spatial layers of the uplink transmission from the interfering device. The UE 210 can determine that the number of spatial layers of the CLI 230 is the number of spatial layers configured for uplink transmission based at least in part on the number of reference signal resources being greater than the number of spatial layers and based on the use of non-codebook.

[0139] In some aspects, the UE 210 may send or otherwise communicate a CLI feedback message (e.g., CSI report 240) to the base station 210 based on the number of spatial layers, which indicates channel state information (e.g., CSI) associated with the CLI 230. That is, the UE 210 may determine and report a CSI value for full-duplex mode based on the number of spatial layers of the determined inter-UE interference (e.g., CLI 230).

[0140] That is, the UE 210 calculates the full-duplex mode CSI based on the number of spatial layers (which may be represented as N) of the inter-UE interference (e.g., CLI 230). If the use of the SRS resource set is non-codebook, the UE 210 may select N SRS resources with the minimum interference strength as the assumed inter-UE interference. Then, the UE 210 may calculate the CSI value based on these assumed inter-UE interference. That is, the UE 210 may identify a reference signal resource subset of at least one reference signal resource set based at least in part on the previous channel state information associated with each reference signal resource. The UE 210 may determine, at least in part based on the configuration 235, that the use information for at least one reference signal resource set includes non-codebook-based use. The UE 210 may determine, at least in part based on the use of the non-codebook and the number of spatial layers of the CLI 230, the channel state information (e.g., CSI) associated with the cross-link interference of the reference signal resource subset.

[0141] If the use of the SRS resource set is a codebook, the UE 210 selects an SRS resource with the minimum interference strength as the assumed inter-UE interference. Then, the UE 210 can calculate the CSI value based on the assumed inter-UE interference. For example, the interference strength of the SRS resource with multiple antenna ports can be calculated by adding the interference strength of each port of the SRS resource. That is, the UE 210 can identify the reference signal resources in the at least one reference signal resource set based at least in part on the previous channel state information associated with each reference signal resource. The UE 210 can determine, at least in part based on the configuration 235, that the use information for at least one reference signal resource set includes the use based on the codebook. The UE 210 can determine the channel state information associated with the cross-link interference for the reference signal resource based at least in part on the use based on the codebook and the number of spatial layers of the cross-link.

[0142] Based on the determined channel state information (e.g., CSI), UE 210 may report its full-duplex mode CSI (e.g., in a CLI feedback message (such as CSI report 240)). If the usage of the SRS resource set is non-codebook, UE 210 may report no more than N SRI values. That is, UE 210 may determine, based at least in part on configuration 235, that usage information for at least one reference signal resource set includes non-codebook based usage. UE 210 may send a CLI feedback message indicating channel state information for a subset of reference signal resources in at least one reference signal resource set based at least in part on non-codebook usage.

[0143] If the usage of the SRS resource set is codebook, the UE 210 may report an SRI value. That is, the UE 210 may determine, based at least in part on the configuration 230, that the usage information for the at least one reference signal resource set includes codebook-based usage. The UE 210 may send a CLI feedback message based at least in part on the codebook-based usage, the CLI feedback message indicating channel state information for reference signal resources in the at least one reference signal resource set.

[0144] In some aspects, UE 210 may be paired with multiple uplink UEs (e.g., multiple potential interfering devices). If base station 205 pairs one downlink UE (e.g., UE 210) with multiple uplink UEs (e.g., in this example, UE 215 and other interfering devices) in full-duplex mode (where the uplink UEs operate using MU-MIMO transmission), base station 205 may combine SRS resources with the same usage from different uplink UEs into one SRS resource set. In this way, base station 205 may indicate to UE 210 an SRS resource set whose usage is a codebook or an SRS resource set whose usage is a non-codebook, each SRS resource set containing SRS resources with the same usage from multiple uplink UEs. UE 210 may determine the number of spatial layers of inter-UE interference (e.g., CLI 230 plus CLI from other interfering devices) based on the use of the SRS resource set, while ignoring the source of the SRS resources in the SRS resource set (e.g., UE 210 does not know which uplink UE the SRS resource set is configured for). UE 210 may report a CSI value and one or more associated SRI values, where the SRI value may identify SRS resources from one or more uplink UEs.

[0145] Thus, the base station 205 can determine that there are multiple interfering devices associated with the UE 210, each interfering device being associated with a corresponding set of reference signal resources having the same usage information. The base station 205 can combine the corresponding set of reference signal resources for each interfering device into an indication of at least one reference signal resource set based at least in part on the same usage information. In some aspects, this can include the base station 205 identifying an interference level associated with at least one interfering device of the multiple interfering devices based at least in part on an SRI and an associated CLI level indicated in a CLI message (e.g., a CLI feedback message such as a CSI report 240).

[0146] Therefore, various aspects of the described technology support informing UE 210 in full-duplex mode how many SRS resources the inter-UE interference comes from. With this information, UE 210 can select the correct matching uplink UE (e.g., interfering device) and determine the accurate CSI value based on the inter-UE interference hypothesis. This can improve the data throughput of the full-duplex system.

[0147] Figure 3 An example of a process 300 for supporting channel state reporting based on sounding reference signal resource usage in full duplex according to aspects of the present disclosure is shown. In some examples, the process 300 can implement aspects of the wireless communication system 100 and / or 200. Aspects of the process 300 can be implemented by the UE 305 and the base station 310 (which can be examples of corresponding devices described herein).

[0148] At 315, the base station 310 may determine, for the UE 305 CLI measurement of the CLI from the interfering device, at least one reference signal resource set (eg, an SRS resource set) and usage information for the at least one reference signal resource set.

[0149] At 320, the base station 310 may send (and the UE 305 may receive) a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE 305 for CLI from the interfering device, and the configuration also indicating usage information for the at least one reference signal resource set.

[0150] At 325, UE 305 may determine, based at least in part on the usage information, a number of spatial layers for a CLI associated with the interfering device. In some aspects (when a codebook is used), this may include base station 310 sending (and UE 305 receiving) an indication of a number of antenna ports for at least one reference signal resource of at least one reference signal resource set with the configuration. In some aspects (when a non-codebook is used), this may include base station 310 sending (and UE 305 receiving) an indication of a number of spatial layers for a CLI associated with the interfering device. Figure 4 The non-codebook usage scenario is specifically shown in FIG.

[0151] In some aspects, this may include the UE 305 determining that the configuration indicates reference signal resources in the at least one reference signal resource set. Thus, the UE 305 may determine, based at least in part on the configuration, that the usage information for the reference signal resources includes codebook-based usage, and may also determine, based at least in part on the codebook-based usage, that the number of spatial layers of the CLI is the number of antenna ports for the reference signal resources in the at least one reference signal resource set.

[0152] In some aspects, this may include the UE 305 determining that the configuration indicates a plurality of reference signal resources in the at least one reference signal resource set. The UE 305 may select the reference signal resource from the plurality of reference signal resources based at least in part on the previously determined channel state information. Thus, the UE 305 may determine, based at least in part on the configuration, that the usage information for the selected reference signal resource includes codebook-based usage, and further determine, based at least in part on the codebook-based usage, that the number of spatial layers of the CLI is the number of antenna ports for the reference signal resource.

[0153] At 330, UE 305 may determine channel state information (e.g., CSI) associated with the CLI based at least in part on the number of spatial layers. At 335, UE 305 may send (and base station 310 may receive) a CLI feedback message (e.g., CSI report) indicating the channel state information.

[0154] In some aspects, this may include the UE 305 determining, based at least in part on the configuration, that the usage information for the at least one reference signal resource set is based on non-codebook usage. Thus, the UE 305 may send a CLI feedback message based at least in part on the non-codebook usage, the CLI feedback message indicating channel state information for a subset of reference signal resources in the at least one reference signal resource set (also as Figure 4 shown).

[0155] In some aspects, this can include the UE 305 determining, based at least in part on the configuration, that the usage information for the at least one reference signal resource set is codebook-based usage. Accordingly, the UE 305 can send a CLI feedback message indicating channel state information for reference signal resources in the at least one reference signal resource set based at least in part on the codebook-based usage.

[0156] Figure 4 An example of a process 400 for supporting channel state reporting based on sounding reference signal resource usage in full duplex according to aspects of the present disclosure is shown. In some examples, the process 400 can implement aspects of the wireless communication system 100 and / or 200. Aspects of the process 400 can be implemented by a UE 405 and a base station 410 (which can be examples of corresponding devices described herein).

[0157] At 415, the base station 410 may determine, for the UE 405 CLI measurement of the CLI from the interfering device, at least one reference signal resource set (eg, an SRS resource set) and usage information for the at least one reference signal resource set.

[0158] At 420, base station 410 may send (and UE 405 may receive) a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by UE 405 for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set. Figure 4 In some aspects, the configuration information sent from the base station 410 to the UE 405 may indicate the number of spatial layers of the CLI associated with the interfering device.

[0159] At 425, UE 405 may determine, based at least in part on the usage information, a number of spatial layers for a CLI associated with the interfering device. In some aspects, this may include UE 405 determining that the configuration indicates one or more reference signal resources in at least one reference signal resource set. UE 405 may determine that the number of reference signal resources in at least one reference signal resource set is not greater than the indicated number of spatial layers associated with the interfering device. Thus, UE 405 may determine, based at least in part on the configuration, that the usage information for the selected reference signal resource includes non-codebook based usage, and further determine, based at least in part on the non-codebook based usage, that the number of spatial layers for the CLI is the number of reference signal resources.

[0160] Alternatively, at 425, UE 405 may determine that the number of reference signal resources in at least one reference signal resource set may be greater than the indicated number of spatial layers associated with the interfering device. Thus, UE 405 may determine, based at least in part on the configuration, that the usage information for the selected reference signal resources includes non-codebook based usage, and further determine, based at least in part on the non-codebook based usage, that the number of spatial layers of the CLI is the same as the indicated number of spatial layers (received at 420).

[0161] At 430, UE 405 may determine channel state information (e.g., CSI) associated with the CLI based at least in part on the number of spatial layers. At 435, UE 405 may send (and base station 410 may receive) a CLI feedback message (e.g., CSI report) indicating the channel state information.

[0162] In some aspects, this may include the UE 405 determining, based at least in part on the configuration, that the usage information for at least one reference signal resource set is based on non-codebook usage. Thus, the UE 405 may send a CLI feedback message based at least in part on the non-codebook usage, the CLI feedback message indicating channel state information for a subset of reference signal resources in the at least one reference signal resource set. The subset of reference signal resources for which the UE 405 reports the channel state information is not greater than the number of reference signal resources used by the UE 405 to calculate the channel state information.

[0163] Figure 5 An example of a process 500 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. In some examples, the process 500 can implement aspects of the wireless communication system 100 and / or 200. Aspects of the process 500 can be implemented by a parent node 505, an IAB node 510, and a downstream node 515 (which can be examples of corresponding devices described herein).

[0164] That is, the techniques for channel state reporting described herein can be adopted in an IAB network. The IAB network may include an anchor node having a connection to a core network, one or more IAB nodes forming a link within the IAB network, and one or more UEs associated with the IAB node (e.g., each IAB node may be associated with one or more UEs). In a broad sense, the IAB network provides a backhaul connection to the core network for the UE via one or more intermediate IAB nodes to the anchor IAB node. In some aspects, each IAB node may include a DU functional unit that manages various aspects of a wireless backhaul link between an IAB node and a parent IAB node (which may be only an upstream IAB node or may be an anchor IAB node) and between an IAB node and a downstream IAB node (which may be referred to as a child IAB node, where the child IAB node may be referred to as an IAB node or UE). In addition, each IAB node may also include a mobile terminal (MT) functional unit that manages various aspects of a wireless access link between an IAB node and one or more associated UEs (in this context, from the perspective of the IAB node, it may also be considered a downstream node). Thus, the parent node 505 may refer to an upstream IAB node within the IAB network, which in some examples may be an anchor node or another upstream IAB node between the IAB node 510 and the anchor node. The IAB node 510 may be an example of an IAB node within the IAB network, which may be implemented or implemented by a base station and / or a UE. The downstream node 515 may be an example of an IAB node downstream of the IAB node 510, which may be referred to as a downstream IAB node communicating with the IAB node 540 via a backhaul link or a UE communicating with the IAB node 510 via an access link. In some aspects, the IAB node 510 may operate in full-duplex communication with the parent node 505 and / or the downstream node 515.

[0165] In general, the process 500 illustrates an example in which a parent node 505 may send or otherwise communicate a CSI reporting configuration to an IAB node 510. In general, a CSI reporting configuration may generally carry or otherwise communicate information identifying how the IAB node 510 generates a CSI report based on monitoring CSI-RS transmissions from the parent IAB node 505 to the IAB node 510 using a CSI-RS resource set. In some aspects, the CSI reporting configuration may also carry or otherwise communicate usage information for the CSI-RS resource set (e.g., information identifying the usage or purpose of the CSI-RS transmission, such as an indication of using the transmission of the associated resources for CSI measurement and reporting purposes). Based on the CSI reporting configuration, the IAB node 510 may send or otherwise provide the CSI resource configuration to a downstream node 515 (which may be only a downstream IAB node served by a DU functional unit of the IAB node 510 or may be a UE served by an MT functional unit of the IAB node 510). The parent node 505 may transmit a CSI-RS according to a CSI-RS resource set, and the IAB node 510 may monitor the CSI-RS to determine the CSI for the link between the IAB node 510 and the parent IAB node 505. However, the downstream node 515 may also receive (e.g., listen to) a CSI-RS transmission from the parent IAB node (which may be a CLI from the perspective of the downstream node 515), and determine (e.g., based on a CSI resource configuration provided by the IAB node 510 to the downstream IAB node 515) CSI information (e.g., CLI information) for the parent IAB node 505. Therefore, the downstream node 515 may transmit or otherwise provide a CSI report to the IAB node 510 indicating the CSI information for the parent node 505. That is, the CSI for the parent node 505 may be associated with a CLI based on the number of spatial layers associated with the parent node 505 (e.g., the number of ports of the CSI-RS). Thus, the IAB node 510 may identify or otherwise determine a number of interfering spatial layers associated with the parent IAB node 505 (eg, from the perspective of the downstream node 515), which may be equal to or less than the number of CSI-RS ports associated with the CSI-RS resource set.

[0166] For example, at 520, the parent node 505 may send or otherwise provide (and the IAB node 510 may receive or otherwise obtain) a CSI report configuration for generating a CSI report. In at least some aspects, the CSI report may be based on the IAB node 510 monitoring the CSI-RS resource set. That is, the CSI report configuration may identify the CSI resource set to be used by the parent node 505 to send the CSI-RS, and the IAB node 510 may monitor the CSI-RS to determine the channel state of the link between the parent node 505 and the IAB node 510. In some aspects, the CSI report configuration may also identify or otherwise indicate usage information for the CSI-RS resource set. For example, the CSI report configuration may carry or otherwise transmit information identifying the number of ports in the CSI-RS resource set. In some aspects, the CSI report configuration may be sent or otherwise provided via an RRC message, a MAC CE, and / or a DCI.

[0167] At 525, the IAB node 510 may send or otherwise provide (and the downstream node 515 may receive or otherwise obtain) a CSI resource configuration. Broadly speaking, the CSI resource configuration may be based on the usage information for the CSI-RS resource set and may identify the number of spatial layers of the CLI associated with the parent node 505. That is, the IAB node 510 may send a CSI resource configuration to the downstream node 515 that includes the number of ports in the CSI-RS resource set. In some aspects, the CSI resource configuration may carry or otherwise convey information substantially similar to that received by the IAB node 510 from the parent node 505 in the CSI reporting configuration.

[0168] Therefore and at 530, the parent node 505 may transmit one or more CSI-RS according to the CSI-RS resource set identified in the CSI reporting configuration. CSI-RS transmission may use multiple ports, which may be associated with the number of spatial layers used for CSI-RS.

[0169] At 535, the downstream node 515 may identify or otherwise determine the CSI based on the CSI-RS transmission of the parent node 505 (e.g., based on the IAB node 510 monitoring the CSI-RS resource set according to the CSI resource configuration). In this context, the CSI-RS may be a reference signal configured by the parent node 505 for the IAB node 510 for channel state measurement and reporting. However, such a CSI-RS may also be received or otherwise detected by the downstream node 515 (e.g., from the perspective of the downstream node 511, the CSI-RS transmission from the parent node 505 to the IAB node 510 may be an interference signal). Therefore, from the perspective of the downstream node 505, the CSI-RS transmission for channel state and reporting from the parent node 505 to the IAB node 510 may result in a CLI at the downstream node 515.

[0170] At 540, the downstream node 515 may send or otherwise provide (and the IAB node 510 may receive or otherwise obtain) a CSI report indicating the CSI. In this context, the CSI may correspond to the CLI observed by the downstream node 515 based on the CSI-RS transmission. The CLI may be based at least to some extent on the number of spatial layers of the CLI (e.g., based on usage information for the CSI-RS, which indicates the number of CSI-RS ports). The CSI report may be sent via a backhaul link of the IAB network (e.g., when the downstream node 515 is another IAB node within the IAB network) or via an access link (e.g., when the downstream node 515 is a UE associated with the IAB node 510).

[0171] For example, the IAB node 510 may identify or otherwise determine (e.g., based on the CSI report) a number of interfering spatial layers determined or otherwise observed by the downstream node 515. In some aspects, the number of interfering spatial layers may be equal to or less than the number of CSI-RS ports associated with the CSI-RS resource set. In some aspects, the IAB node 510 may identify or otherwise determine (e.g., based on the CSI report) a PMI associated with the number of interfering spatial layers.

[0172] At 545, the IAB node 515 may send or otherwise provide a CSI report (e.g., a second CSI report) to the parent node 505. In this context, the CSI report may be based on the CSI-RS measurements performed by the IAB node 510 and the CSI report received from the downstream node 515. For example, the CSI report provided by the IAB node 510 to the parent node 505 may carry or otherwise transmit the CSI information of the IAB node 510 and the CSI report associated with the CLI from the downstream node 515 based on the number of spatial layers of the CSI-RS resource set. Thus, the IAB node 510 may send or otherwise provide (and the parent node 505 may receive or otherwise obtain) a CSI report (e.g., a second CSI report) indicating the CSI (e.g., based on the IAB node 510 monitoring the CSI-RS resource set). The CSI report (e.g., the second CSI report) in this example may carry or otherwise transmit part or all of the CSI report received from the downstream node 515.

[0173] Thus, the child node (e.g., downstream node 515) may report full-duplex CSI to the IAB node 510 based on an indication of the CSI resource configuration. The downstream node 515 may measure (e.g., monitor) the CSI-RS sent from the parent node 505, and then report the number of interfering signal spatial layers. In this context, the number of spatial layers may not be greater than the number of CSI-RS ports and corresponding CSI. In some aspects, the CSI report may report the precoding matrix (PMI) (e.g., precoding weights) of the interfering signal. The IAB node 510 then reports the full-duplex CSI to the parent node 505 based on the CSI report it receives from the downstream node 515. In the CSI report provided by the IAB node 510 to the parent node 505, the value of the rank indicator (RI) may be equal to the number of interfering spatial layers indicated by the downstream node 515. That is, the CSI report sent to the parent node 505 at 545 may also indicate the number of spatial layers and / or CLI based on spatial layers (eg, based on the downstream node 515 detecting CSI-RS transmissions from the parent node 505 to the IAB node 510).

[0174] Figure 6 An example of a process 600 for supporting channel state reporting based on sounding reference signal resource usage in full duplex according to aspects of the present disclosure is shown. In some examples, the process 600 can implement aspects of the wireless communication system 100 and / or 200. Aspects of the process 600 can be implemented by a parent node 605, an IAB node 610, and a downstream node 615 (which can be examples of corresponding devices described herein). In some aspects, the IAB node 610 can operate in full duplex communication with the parent node 605 and / or the downstream node 615.

[0175] In general, process 600 illustrates an example of the techniques described that can be used in an upstream scenario within an IAB network. For example, an IAB node 610 may send or otherwise provide an SRS measurement configuration to a parent node 605. In general, an SRS measurement configuration may provide information to be used by a parent node 605 to measure a CLI on a reference signal resource set (e.g., an SRS resource set) to be used by a downstream node 615 to send an SRS. The SRS measurement configuration may also identify or otherwise indicate the number of spatial layers of a CLI associated with a downstream node (e.g., based on usage information for reference signal resources). The IAB node 610 may also send or otherwise provide an SRS transmission configuration to a downstream node 615, which carries or otherwise transmits information identifying a reference signal resource set to be used by a downstream node 615 to send an SRS. The SRS transmission configuration may also carry or otherwise transmit information identifying usage information of reference signal resources. The downstream node 615 may send an SRS according to the SRS transmission configuration, and the IAB node 610 may use the SRS to determine the channel state of the link between the IAB node 610 and the downstream node 615. However, the parent node 605 may also receive and measure the SRS transmission of the downstream node 615. Again, this may provide the parent node 605 with an indication of the CLI based on the channel state of the link between the IAB node 610 and its downstream node 615. Therefore, the parent node 605 may also identify or otherwise determine the amount of interference (e.g., channel state / CLI interference) and make scheduling decisions for the IAB node 610 and / or the downstream node 615. The parent node 605 may send or otherwise provide uplink resource configuration (e.g., PUCCH and / or PUSCH resource configuration) based on the CLI determined by the parent node 605 measuring the SRS transmission of the downstream node 615. Again, this may be based on usage information (e.g., the number of spatial layers of the CLI associated with the downstream IAB node). In this context, the CLI or co-channel interference may come from the downstream node 615 and the parent node 605.

[0176] Thus and at 620, the IAB node 610 may send or otherwise provide (and the parent node 605 may receive or otherwise obtain) an SRS measurement configuration. Broadly speaking, the SRS measurement configuration may carry or otherwise convey information used by the parent node 605 to measure the CLI on a reference signal resource set used by the downstream node 615 to send the SRS. In some aspects, the SRS measurement configuration may also identify or otherwise indicate the number of spatial layers of the CLI associated with the downstream node 615 (e.g., based on usage information for the reference signal resource set). That is, the SRS measurement configuration may identify usage information for a reference signal resource set (e.g., an SRS resource set). Thus, in this context, the IAB node 610 may send a message to the parent node 605 indicating an SRS measurement configuration, the SRS measurement configuration containing usage information for the SRS resource set. In some aspects, the SRS measurement configuration may be communicated via a backhaul link within the IAB network (eg, sent in an RRC message, MAC CE, and / or DCI via a backhaul link between the parent node 605 and the IAB node 610).

[0177] At 625, the IAB node 610 may send or otherwise provide (and the downstream node 615 may receive or otherwise obtain) an SRS transmission configuration indicating a reference signal resource set to be used by the downstream node 615 to transmit the SRS. The SRS transmission configuration may also carry or otherwise convey an indication of usage information for the reference signal resources. That is, the IAB node 610 in this example may send a message indicating an SRS transmission configuration to the downstream node 615 (e.g., a child node or a UE), the SRS transmission configuration including usage information for the SRS resource set. In some aspects, the usage information (e.g., a usage value) may be the same as indicated to the parent node 605 in the SRS measurement configuration.

[0178] At 630, the downstream node 615 may perform SRS transmission according to the reference signal resource set (e.g., using resources identified in the SRS resource set). That is, the downstream node 615 may identify resources that may be used to send SRS and perform SRS transmission using the corresponding resources. Broadly speaking, SRS transmission is intended for use by the IAB node 610 for channel sounding (e.g., for channel measurement and reporting, such as CSI). However, such SRS transmission may also be received or otherwise monitored by the parent node 605. From the perspective of the parent node 606, the SRS transmission may be an interference signal to be measured and used by the parent node 655 for scheduling decisions.

[0179] Thus, at 635, the parent node 605 may identify or otherwise determine CSI (e.g., in this context, CLI) based on the SRS transmissions performed by the downstream node 615. That is, the parent node 605 may monitor and measure or otherwise quantify the SRS transmissions from the downstream node 615. Based on such measurements, the parent node 605 may identify or otherwise determine the amount or degree of interference (e.g., CLI) generated by the transmissions from the downstream node 615. Thus, in this context, the parent node 605 may use the CLI associated with the downstream node 615 transmissions when making scheduling decisions (e.g., identifying or otherwise allocating PUCCH and / or PUSCH resources) for communications involving the IAB node 610 and / or the downstream node 615. For example, the parent node 605 may optimize such scheduling decisions to mitigate or otherwise avoid interference associated with the downstream node 615 transmissions.

[0180] Therefore and at 640, the parent node 605 can send or otherwise provide (and the IAB node 610 can receive or otherwise obtain) an uplink resource configuration that is based at least in part on the CLI of the parent node 605 measuring the SRS transmission from the downstream node 615. Again, since the SRS measurement configuration includes usage information of the reference signal resource set, in this case, the uplink resource configuration can be based on the number of spatial layers associated with the SRS transmission. Therefore, the parent node 605 in this example can measure (e.g., monitor) the SRS transmission of the downstream node 615 and determine the number of interfering spatial layers associated with the CLI. This can improve the corresponding uplink resource configuration (e.g., PUSCH and / or PUCCH resource configuration) scheduling decision at the parent node 605.

[0181] Figure 7 A block diagram 700 of a device 705 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The device 705 may be an example of aspects of a UE 115 or an IAB node as described herein. The device 705 may include a receiver 710, a communication manager 715, and a transmitter 720. The device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0182] The receiver 710 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to channel state reporting supporting the use of sounding reference signal resources in full duplex, etc.). The information may be passed to other components of the device 705. The receiver 710 may be a reference Fig.10Examples of various aspects of the transceiver 1020 are described. The receiver 710 may utilize a single antenna or a group of antennas.

[0183] The communication manager 715 may perform the following operations: receiving a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from the interfering device, the configuration further indicating usage information for the at least one reference signal resource set; determining the number of spatial layers of the CLI associated with the interfering device based on the usage information; determining channel state information associated with the CLI based on the number of spatial layers; and sending a CLI feedback message indicating the channel state information. The communication manager 715 may be an example of aspects of the communication manager 1010 described herein.

[0184] When the device 705 is an example of an IAB node, the communication manager 715 can perform the following operations: receive a CSI report configuration for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node from a parent IAB node, the configuration also indicating usage information for at least one CSI-RS resource set; send a CSI resource configuration to a downstream node, the CSI resource configuration indicating the number of spatial layers of a CLI associated with the parent IAB node based at least in part on the usage information; and receive a CSI report indicating CSI from the downstream node, the CSI being associated with the CLI based at least in part on the number of spatial layers.

[0185] When the device 705 is an example of an IAB node, the communication manager 715 can perform the following operations: sending an SRS measurement configuration to a parent IAB node for the parent IAB node to measure cross-link interference on at least one reference signal resource set to be used by the downstream node when sending SRS, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on the usage information for the at least one reference signal resource set; sending an SRS transmission configuration to the downstream node indicating at least one reference signal resource set to be used when sending SRS, the configuration indicating the usage information for at least one reference signal resource set; and receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being based at least in part on measuring the CLI determined according to the SRS and at least in part on the number of spatial layers.

[0186] The communication manager 715 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 715 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0187] The communication manager 715 or its subcomponents may be physically located at various locations, including being distributed so that portions of the functions are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 715 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 715 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or combinations thereof).

[0188] The transmitter 720 can transmit signals generated by other components of the device 705. In some examples, the transmitter 720 can be co-located with the receiver 710 in a transceiver module. For example, the transmitter 720 can be a reference Fig.10 Examples of various aspects of the transceiver 1020 are described. The transmitter 720 may utilize a single antenna or a group of antennas.

[0189] Figure 8 A block diagram 800 of a device 805 supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The device 805 may be an example of aspects of a device 805, an IAB node, or a UE 115 as described herein. The device 805 may include a receiver 810, a communication manager 815, and a transmitter 840. The device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0190] The receiver 810 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to channel state reporting supporting the use of sounding reference signal resources in full duplex, etc.). The information may be passed to other components of the device 805. The receiver 810 may be a reference Fig.10 Examples of various aspects of the transceiver 1020 are described. The receiver 810 may utilize a single antenna or a group of antennas.

[0191] The communication manager 815 may be an example of aspects of the communication manager 715 as described herein. The communication manager 815 may include a configuration manager 820, a spatial layer manager 825, a CSI manager 830, and a CSI reporting manager 835. The communication manager 815 may be an example of aspects of the communication manager 1010 as described herein.

[0192] The configuration manager 820 may receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set.

[0193] The configuration manager 820 may receive, from a parent IAB node, a CSI reporting configuration for generating a CSI report associated with monitoring of at least one CSI-RS resource set by the IAB node, the configuration also indicating usage information for the at least one CSI-RS resource set.

[0194] The configuration manager 820 may send to a parent IAB node an SRS measurement configuration for the parent IAB node to measure cross-link interference on at least one reference signal resource set to be used by a downstream node when sending an SRS, the configuration also indicating a number of spatial layers of a CLI associated with the downstream node based at least in part on usage information for at least one reference signal resource set.

[0195] The spatial layer manager 825 may determine the number of spatial layers of the CLI associated with the interfering device based on the usage information.

[0196] The spatial layer manager 825 may send a CSI resource configuration to the downstream node, the CSI resource configuration indicating a number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information.

[0197] The spatial layer manager 825 may transmit, to a downstream node, an SRS transmission configuration indicating at least one reference signal resource set to be used when transmitting the SRS, the configuration indicating usage information for the at least one reference signal resource set.

[0198] The CSI manager 830 may determine channel state information associated with the CLI based on the number of spatial layers.

[0199] The CSI reporting manager 835 may send a CLI feedback message indicating channel state information.

[0200] The CSI reporting manager 835 may receive a CSI report from a downstream node indicating CSI associated with cross-link interference based at least in part on the number of spatial layers.

[0201] The CSI reporting manager 835 may receive an uplink resource configuration from a parent IAB node, the uplink resource configuration being based at least in part on measuring a CLI determined from the SRS and based at least in part on the number of spatial layers.

[0202] The transmitter 840 can transmit signals generated by other components of the device 805. In some examples, the transmitter 840 can be co-located with the receiver 810 in a transceiver module. For example, the transmitter 840 can be a reference Fig.10 Examples of various aspects of the transceiver 1020 are described. The transmitter 840 may utilize a single antenna or a group of antennas.

[0203] Fig. 9 A block diagram 900 of a communication manager 905 supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The communication manager 905 may be an example of aspects of the communication manager 715, the communication manager 815, or the communication manager 1010 described herein. The communication manager 1105 may include a configuration manager 910, a spatial layer manager 915, a CSI manager 920, a CSI reporting manager 925, an antenna port manager 930, an SRS RS manager 935, a multiple SRS RS manager 940, a CLI spatial layer manager 945, an SRS RS subset manager 950, a codebook usage manager 955, and a non-codebook usage manager 960. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0204] The configuration manager 910 may receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for the CLI from the interfering device, and the configuration also indicating usage information for the at least one reference signal resource set. In some cases, the CLI feedback message indicates an SRI associated with the CLI. In some cases, the CLI feedback message may indicate an SRI based at least in part on the usage information for at least one reference signal resource set including codebook-based usage. In some cases, the CLI feedback message may indicate a number of SRIs equal to the number of spatial layers of the CLI associated with the interfering device based at least in part on the usage information for at least one reference signal resource set including non-codebook-based usage. In some cases, the configuration is received in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0205] The configuration manager 910 may receive, from a parent IAB node, a CSI report configuration for generating a CSI report associated with monitoring at least one CSI-RS resource set by the IAB node, the configuration also indicating usage information for the at least one CSI-RS resource set. In some examples, the CSI report configuration may be received in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0206] The configuration manager 910 may send to the parent IAB node an SRS measurement configuration for measuring cross-link interference by the parent IAB node on at least one reference signal resource set to be used by the downstream node when sending the SRS, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on the usage information for the at least one reference signal resource set. In some examples, the downstream node is a downstream IAB node or a UE. In some examples, the CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

[0207] The spatial layer manager 915 may determine the number of spatial layers of the CLI associated with the interfering device based on the usage information.

[0208] The spatial layer manager 915 may send a CSI resource configuration to the downstream node, the CSI resource configuration indicating a number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information.

[0209] The spatial layer manager 915 may transmit, to a downstream node, an SRS transmission configuration indicating at least one reference signal resource set to be used when transmitting the SRS, the configuration indicating usage information for the at least one reference signal resource set.

[0210] The spatial layer manager 915 may identify, based at least in part on the CSI report, a number of interfering spatial layers that is equal to or less than a number of CSI-RS ports associated with at least one CSI-RS resource set.

[0211] Spatial layer manager 915 may identify a PMI associated with a number of interfering spatial layers based at least in part on the CSI report.

[0212] The CSI manager 920 may determine channel state information associated with the CLI based on the number of spatial layers. In some cases, the channel state information is based on the UE operating in full-duplex communication with the interfering device.

[0213] The CSI reporting manager 925 may send a CLI feedback message indicating channel state information.

[0214] The CSI reporting manager 925 may send a second CSI report to the parent IAB node according to the CSI reporting configuration, the second CSI report indicating CSI obtained based on monitoring at least one CSI-RS resource set, the second CSI report indicating a CSI report received from a downstream node.

[0215] The CSI reporting manager 925 may receive a CSI report from a downstream node indicating CSI associated with cross-link interference based at least in part on the number of spatial layers.

[0216] The CSI reporting manager 925 may receive an uplink resource configuration from a parent IAB node, the uplink resource configuration being based at least in part on measuring a CLI determined from an SRS and at least in part on the number of spatial layers. In some examples, the SRS measurement configuration is sent in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof. In some examples, the CSI is based at least in part on the IAB node operating in full-duplex communication with a downstream node.

[0217] Antenna port manager 930 may receive, along with the configuration, an indication of a number of antenna ports for at least one reference signal resource in at least one reference signal resource set.

[0218] The SRS RS manager 935 may determine a configuration indicating a reference signal resource in at least one reference signal resource set. In some examples, determining usage information for the reference signal resource based on the configuration includes codebook-based usage. In some examples, determining the number of spatial layers of the CLI based on the codebook-based usage includes the number of antenna ports for the reference signal resource in at least one reference signal resource set.

[0219] The multi-SRS RS manager 940 may determine a reference signal resource set in the configuration indicating at least one reference signal resource set. In some examples, the multi-SRS RS manager 940 may select a reference signal resource from the reference signal resource set based on previously determined channel state information. In some examples, determining the usage information for the selected reference signal resource based on the configuration includes codebook-based usage. In some examples, determining the number of spatial layers of the CLI based on the codebook-based usage includes the number of antenna ports for the reference signal resource.

[0220] The CLI spatial layer manager 945 may receive, together with the configuration, an indication of the number of CLI spatial layers associated with the interfering device. In some examples, determining usage information for at least one reference signal resource set based on the configuration includes non-codebook based usage and the number of reference signal resources in at least one reference signal resource set.

[0221] In some examples, the CLI spatial layer manager 945 may determine that the number of reference signal resources is equal to or less than the number of spatial layers of the uplink transmission from the interfering device. In some examples, the CLI spatial layer manager 945 may determine that the number of spatial layers of the CLI includes the number of reference signal resources based on the number of reference signal resources being equal to or less than the number of spatial layers and based on non-codebook usage. In some examples, determining usage information for at least one reference signal resource set based on configuration includes non-codebook based usage and the number of reference signal resources in at least one reference signal resource set.

[0222] In some examples, the CLI spatial layer manager 945 may determine that the number of reference signal resources is greater than the number of spatial layers for uplink transmission from the interfering device. In some examples, the CLI spatial layer manager 945 may determine that the number of spatial layers of the CLI includes the number of spatial layers configured for uplink transmission based on the number of reference signal resources being greater than the number of spatial layers and based on the use of a non-codebook.

[0223] The SRS RS subset manager 950 may identify a reference signal resource subset of at least one reference signal resource set based on previous channel state information associated with each reference signal resource. In some examples, determining usage information for at least one reference signal resource set based on the configuration includes non-codebook based usage. In some examples, the SRS RS subset manager 950 may determine channel state information associated with the CLI for the reference signal resource subset based on the non-codebook based usage and the number of spatial layers of the CLI.

[0224] The codebook usage manager 955 may identify reference signal resources of at least one reference signal resource set based on previous channel state information associated with each reference signal resource. In some examples, determining usage information for at least one reference signal resource set based on configuration includes based on usage of a codebook.

[0225] In some examples, the codebook usage manager 955 may determine channel state information associated with the CLI for reference signal resources based on the codebook-based usage and the number of spatial layers of the CLI. In some examples, the codebook usage manager 955 may send a CLI feedback message based on the codebook-based usage, the CLI feedback message indicating channel state information for reference signal resources in at least one reference signal resource set.

[0226] The non-codebook usage manager 960 may determine, based on the configuration, that usage information for at least one reference signal resource set includes non-codebook based usage. In some examples, the non-codebook usage manager 960 may send a CLI feedback message based on non-codebook usage, the CLI feedback message indicating channel state information for a reference signal resource subset in at least one reference signal resource set.

[0227] Fig.10 A schematic diagram of a system 1000 including a device 1005 supporting channel state reporting based on SRS resource usage in full duplex according to various aspects of the present disclosure is shown. The device 1005 may be an example of a device 705, a device 805, or a UE 115 as described herein or a component including the device 705, the device 805, the IAB node, or the UE 115. The device 1005 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 1010, an I / O controller 1015, a transceiver 1020, an antenna 1025, a memory 1030, and a processor 1040. These components may communicate electronically via one or more buses (e.g., a bus 1045).

[0228] The communication manager 1010 can perform the following operations: receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for at least one reference signal resource set; determine the number of spatial layers of the CLI associated with the interfering device based on the usage information; determine channel state information associated with the CLI based on the number of spatial layers; and send a CLI feedback message indicating the channel state information.

[0229] The communication manager 1010 may perform the following operations: receiving a CSI report configuration from a parent IAB node for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node, the configuration also indicating usage information for at least one CSI-RS resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating the number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information; and receiving a CSI report from the downstream node indicating CSI, the CSI being associated with the cross-link interference based at least in part on the number of spatial layers.

[0230] The communication manager 1010 can perform the following operations: sending an SRS measurement configuration to a parent IAB node for measuring cross-link interference by the parent IAB node on at least one reference signal resource set to be used by the downstream node when sending SRS, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on usage information for at least one reference signal resource set; sending an SRS transmission configuration to the downstream node indicating at least one reference signal resource set to be used when sending SRS, the configuration indicating usage information for at least one reference signal resource set; and receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being based at least in part on measuring the CLI determined according to the SRS and at least in part on the number of spatial layers.

[0231] I / O controller 1015 can manage input and output signals for device 1005. I / O controller 1015 can also manage peripheral devices that are not integrated into device 1005. In some cases, I / O controller 1015 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1015 can utilize a computer such as a , or another known operating system. In other cases, I / O controller 1015 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 1015 may be implemented as part of a processor. In some cases, a user may interact with device 1005 via I / O controller 1015 or via hardware components controlled by I / O controller 1015.

[0232] The transceiver 1020 may communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1020 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1020 may also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and demodulating packets received from an antenna.

[0233] In some cases, a wireless device may include a single antenna 1025. However, in some cases, the device may have more than one antenna 1025 that are capable of sending or receiving multiple wireless transmissions simultaneously.

[0234] The memory 1030 may include RAM and ROM. The memory 1030 may store computer-readable, computer-executable code 1035, which includes instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 1030 may also contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0235] Processor 1040 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1040 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 1040. Processor 1040 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1030) to cause device 1005 to perform various functions (e.g., functions or tasks that support channel state reporting based on the use of sounding reference signal resources in full duplex).

[0236] The code 1035 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1035 may be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, the code 1035 may not be directly executable by the processor 1040, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0237] Fig.11 A block diagram 1100 of a device 1105 supporting channel state reporting based on sounding reference signal resource usage in full duplex according to various aspects of the present disclosure is shown. The device 1105 may be an example of various aspects of a base station 105 or an IAB node as described herein. The device 1105 may include a receiver 1110, a communication manager 1115, and a transmitter 1120. The device 1105 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0238] The receiver 1110 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to channel state reporting supporting the use of sounding reference signal resources in full duplex, etc.). The information may be communicated to other components of the device 1105. The receiver 1110 may be a reference Fig.14Examples of various aspects of the transceiver 1420 are described. The receiver 1110 may utilize a single antenna or a group of antennas.

[0239] The communication manager 1115 may perform the following operations: determining at least one reference signal resource set and usage information for at least one reference signal resource set for CLI measurement by the UE of the CLI from the interfering device; sending a configuration for sending a CLI feedback message to the UE, the configuration indicating at least one reference signal resource set to be monitored by the UE for the CLI from the interfering device, the configuration also indicating usage information for at least one reference signal resource set; and receiving a CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information. The communication manager 1115 may be an example of aspects of the communication manager 1410 described herein.

[0240] The communication manager 1115 may perform the following operations: receiving a CSI report configuration from a parent IAB node for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node, the configuration also indicating usage information for at least one CSI-RS resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating the number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information; and receiving a CSI report from the downstream node indicating CSI, the CSI being associated with the cross-link interference based at least in part on the number of spatial layers.

[0241] The communication manager 1115 can perform the following operations: sending an SRS measurement configuration to a parent IAB node for measuring CLI by the parent IAB node on at least one reference signal resource set to be used by the downstream node when sending SRS, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on usage information for at least one reference signal resource set; sending an SRS transmission configuration to the downstream node indicating at least one reference signal resource set to be used when sending SRS, the configuration indicating usage information for at least one reference signal resource set; and receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being based at least in part on measuring the CLI determined according to the SRS and at least in part on the number of spatial layers.

[0242] The communication manager 1115 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 1115 or its subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0243] The communication manager 1115 or its subcomponents may be physically located at various locations, including being distributed so that portions of the functions are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 1115 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 1115 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or combinations thereof).

[0244] The transmitter 1120 may transmit signals generated by other components of the device 1105. In some examples, the transmitter 1120 may be co-located with the receiver 1110 in a transceiver module. For example, the transmitter 1120 may be a reference Fig.14 Examples of various aspects of the transceiver 1420 are described. The transmitter 1120 may utilize a single antenna or a group of antennas.

[0245] Fig.12 A block diagram 1200 of a device 1205 supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The device 1205 can be an example of aspects of a device 1205 or an IAB node or base station 105 as described herein. The device 1205 may include a receiver 1210, a communication manager 1215, and a transmitter 1235. The device 1205 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0246] The receiver 1210 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to channel state reporting supporting the use of sounding reference signal resources in full duplex, etc.). The information may be communicated to other components of the device 1205. The receiver 1210 may be a reference Fig.14 Examples of various aspects of the transceiver 1420 are described. The receiver 1210 may utilize a single antenna or a group of antennas.

[0247] The communication manager 1215 may be an example of aspects of the communication manager 1115 as described herein. The communication manager 1215 may include a usage manager 1220, a configuration manager 1225, and a CSI reporting manager 1230. The communication manager 1215 may be an example of aspects of the communication manager 1410 as described herein.

[0248] The usage manager 1220 may determine at least one reference signal resource set and usage information for the at least one reference signal resource set for CLI measurement by the UE of the CLI from the interfering device.

[0249] The usage manager 1220 may receive, from a parent IAB node, a CSI reporting configuration for generating a CSI report associated with monitoring of at least one CSI-RS resource set by the IAB node, the configuration also indicating usage information for the at least one CSI-RS resource set.

[0250] The usage manager 1220 can send to the parent IAB node an SRS measurement configuration for the parent IAB node to measure cross-link interference on at least one reference signal resource set to be used by the downstream node when sending SRS, and the configuration also indicates the number of spatial layers of the CLI associated with the downstream node based at least in part on the usage information for the at least one reference signal resource set.

[0251] The configuration manager 1225 may send a configuration for sending a CLI feedback message to the UE, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, and the configuration also indicating usage information for the at least one reference signal resource set.

[0252] The configuration manager 1225 may send a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of a CLI associated with a parent IAB node based at least in part on the usage information.

[0253] The configuration manager 1225 may transmit, to a downstream node, an SRS transmission configuration indicating at least one reference signal resource set to be used when transmitting the SRS, the configuration indicating usage information for the at least one reference signal resource set.

[0254] The CSI reporting manager 1230 may receive a CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information.

[0255] The CSI reporting manager 1230 may receive a CSI report from a downstream node indicating CSI associated with cross-link interference based at least in part on the number of spatial layers.

[0256] The CSI reporting manager 1230 may receive an uplink resource configuration from a parent IAB node, the uplink resource configuration being based at least in part on measuring a CLI determined from the SRS and based at least in part on the number of spatial layers.

[0257] The transmitter 1235 can transmit signals generated by other components of the device 1205. In some examples, the transmitter 1235 can be co-located with the receiver 1210 in a transceiver module. For example, the transmitter 1235 can be a reference Fig.14 Examples of various aspects of the transceiver 1420 are described. The transmitter 1235 can utilize a single antenna or a group of antennas.

[0258] Fig.13 A block diagram 1300 of a communication manager 1305 supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The communication manager 1305 may be an example of aspects of the communication manager 1115, the communication manager 1215, or the communication manager 1410 described herein. The communication manager 1305 may include a usage manager 1310, a configuration manager 1315, a CSI report manager 1320, a non-codebook usage manager 1325, a codebook usage manager 1330, a multi-CLI manager 1335, an SRS RS subset manager 1340, and an SRS RS manager 1345. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0259] The usage manager 1310 may determine at least one reference signal resource set and usage information for the at least one reference signal resource set for CLI measurement by the UE of the CLI from the interfering device.

[0260] The configuration manager 1315 may send a configuration for sending a CLI feedback message to the UE, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from the interfering device, and the configuration further indicating usage information for at least one reference signal resource set. In some cases, the configuration is sent in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0261] The configuration manager 1315 may receive from the parent IAB node a CSI report configuration for generating a CSI report associated with monitoring at least one CSI-RS resource set by the IAB node, the configuration also indicating usage information for at least one CSI-RS resource set. In some examples, the CSI report configuration may be received in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof. In some examples, the downstream node is a downstream IAB node or a UE.

[0262] The configuration manager 1315 may send a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information.

[0263] The configuration manager 1315 may send to the parent IAB node an SRS measurement configuration for measuring cross-link interference by the parent IAB node on at least one reference signal resource set to be used by the downstream node when sending the SRS, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on the usage information for the at least one reference signal resource set. In some examples, the SRS measurement configuration is sent in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof. In some examples, the CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

[0264] The configuration manager 1315 may transmit, to a downstream node, an SRS transmission configuration indicating at least one reference signal resource set to be used when transmitting the SRS, the configuration indicating usage information for the at least one reference signal resource set.

[0265] The CSI reporting manager 1320 may receive a CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information. In some cases, the channel state information is based on the UE operating in full-duplex communication with the interfering device.

[0266] The CSI reporting manager 1320 may receive a CSI report from a downstream node indicating CSI associated with cross-link interference based at least in part on the number of spatial layers. In some examples, the CSI may be based at least in part on the IAB node operating in full-duplex communication with the downstream node.

[0267] The CSI reporting manager 1320 may send a second CSI report to the parent IAB node according to the CSI reporting configuration, the second CSI report indicating CSI obtained based on monitoring at least one CSI-RS resource set, the second CSI report indicating a CSI report received from a downstream node.

[0268] The CSI reporting manager 1320 may identify, based at least in part on the CSI report, a number of interfering spatial layers that is equal to or less than a number of CSI-RS ports associated with at least one CSI-RS resource set.

[0269] The CSI reporting manager 1320 may identify a PMI associated with a number of interfering spatial layers based at least in part on the CSI report.

[0270] The non-codebook usage manager 1325 may determine that the usage information for at least one reference signal resource set includes non-codebook based usage. In some examples, the non-codebook usage manager 1325 may include an indication of the number of spatial layers in the configuration.

[0271] The codebook usage manager 1330 may determine that the usage information for at least one reference signal resource set includes codebook-based usage. In some examples, the codebook usage manager 1330 may include in the configuration an indication of the number of antenna ports for at least one reference signal resource of at least one reference signal resource set.

[0272] The multi-CLI manager 1335 may determine that there is a set of interfering devices associated with the UE, each interfering device being associated with a corresponding set of reference signal resources having the same usage information. In some examples, the multi-CLI manager 1335 may combine the corresponding set of reference signal resources for each interfering device into an indication of at least one reference signal resource set based on the same usage information.

[0273] In some examples, multi-CLI manager 1335 may identify an interference level associated with at least one interfering device in the set of interfering devices based on the SRI and the associated CLI level indicated in the CLI message.

[0274] The SRS RS subset manager 1340 may receive a CLI feedback message indicating channel state information for a reference signal resource subset in at least one reference signal resource set based on non-codebook based usage.

[0275] The SRS RS manager 1345 may receive a CLI feedback message indicating channel state information for reference signal resources in at least one reference signal resource set based on codebook-based usage.

[0276] Fig.14 A schematic diagram of a system 1400 including a device 1405 supporting channel state reporting based on SRS resource usage in full duplex according to various aspects of the present disclosure is shown. The device 1405 may be an example of a device 1105, a device 1205, or a base station 105 as described herein or include a component of the device 1105, the device 1205, the IAB node, or the base station 105. The device 1405 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 1410, a network communication manager 1415, a transceiver 1420, an antenna 1425, a memory 1430, a processor 1440, and an inter-station communication manager 1445. These components may communicate electronically via one or more buses (e.g., a bus 1450).

[0277] The communication manager 1410 can perform the following operations: determine at least one reference signal resource set and usage information for at least one reference signal resource set for CLI measurement by the UE of the CLI from the interfering device; send a configuration for sending a CLI feedback message to the UE, the configuration indicating at least one reference signal resource set to be monitored by the UE for the CLI from the interfering device, the configuration also indicating usage information for at least one reference signal resource set; and receive a CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information.

[0278] The communication manager 1410 may perform the following operations: receiving a CSI report configuration from a parent IAB node for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node, the configuration also indicating usage information for at least one CSI-RS resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating the number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information; and receiving a CSI report from the downstream node indicating CSI, the CSI being associated with the cross-link interference based at least in part on the number of spatial layers.

[0279] The communication manager 1410 can perform the following operations: sending an SRS measurement configuration to a parent IAB node for measuring cross-link interference by the parent IAB node on at least one reference signal resource set to be used by the downstream node when sending SRS, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on usage information for at least one reference signal resource set; sending an SRS transmission configuration to the downstream node indicating at least one reference signal resource set to be used when sending SRS, the configuration indicating usage information for at least one reference signal resource set; and receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being based at least in part on measuring the CLI determined according to the SRS and at least in part on the number of spatial layers.

[0280] The network communications manager 1415 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1415 may manage the transmission of data communications for client devices (eg, one or more UEs 115).

[0281] The transceiver 1420 may communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1420 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1420 may also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and demodulating packets received from an antenna.

[0282] In some cases, a wireless device may include a single antenna 1425. However, in some cases, the device may have more than one antenna 1425 that are capable of sending or receiving multiple wireless transmissions simultaneously.

[0283] Memory 1430 may include random access memory (RAM), read-only memory (ROM), or a combination thereof. Memory 1430 may store computer readable code 1435, which includes instructions that, when executed by a processor (e.g., processor 1440), cause the device to perform various functions described herein. In some cases, memory 1430 may also contain, among other things, a basic input / output system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0284] Processor 1440 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1440 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1440. Processor 1440 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1430) to cause device 1405 to perform various functions (e.g., functions or tasks that support channel state reporting based on the use of sounding reference signal resources in full duplex).

[0285] The inter-site communication manager 1445 can manage communications with other base stations 105 and can include a controller or scheduler for controlling communications with UE 115 in cooperation with other base stations 105. For example, the inter-site communication manager 1445 can coordinate the scheduling of transmissions to UE 115 to implement various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-site communication manager 1445 can provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0286] The code 1435 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1435 may be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, the code 1435 may not be directly executable by the processor 1440, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0287] Fig.15 A flow chart illustrating a method 1500 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1500 may be implemented by a UE 115 or a component thereof as described with reference to Figures 7 to 10 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0288] At 1505, the UE may receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed as described with reference to Figures 8 to 9 Describes the configuration manager to perform.

[0289] At 1510, the UE may determine the number of spatial layers of the CLI associated with the interfering device based on the usage information. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed as described with reference to Figures 8 to 9 The spatial layer manager described is used to perform the

[0290] At 1515, the UE may determine channel state information associated with the CLI based on the number of spatial layers. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be as described with reference to Figures 8 to 9 Described in the CSI Manager to perform.

[0291] At 1520, the UE may send a CLI feedback message indicating channel state information. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be described with reference to Figures 8 to 9 The CSI reporting manager described here is used to perform the

[0292] Fig.16 A flow chart illustrating a method 1600 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1600 may be implemented by a UE 115 or a component thereof as described herein. Figures 7 to 10 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0293] At 1605, the UE may receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set. The operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed as described with reference to Figures 8 to 9 Describes the configuration manager to perform.

[0294] At 1610, the UE may determine a configuration indicating reference signal resources in at least one reference signal resource set. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed as described with reference to Fig. 9 The SRS described is executed by the RS manager.

[0295] At 1615, the UE may determine, based on the configuration, usage information for reference signal resources including codebook-based usage. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be as described with reference to Fig. 9 The SRS described is executed by the RS manager.

[0296] At 1620, the UE may determine the number of spatial layers of the CLI associated with the interfering device based on the usage information. The operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be as described with reference to Figures 8 to 9 The spatial layer manager described is used to perform the

[0297] At 1625, the UE may determine the number of spatial layers of the CLI based on the use of the codebook including the number of antenna ports of the reference signal resources in the at least one reference signal resource set. The operation of 1625 may be performed according to the methods described herein. In some examples, aspects of the operation of 1625 may be performed as described with reference to Fig. 9 The SRS described is executed by the RS manager.

[0298] At 1630, the UE may determine channel state information associated with the CLI based on the number of spatial layers. The operations of 1630 may be performed according to the methods described herein. In some examples, aspects of the operations of 1630 may be as described with reference to Figures 8 to 9 Described in the CSI Manager to perform.

[0299] At 1635, the UE may send a CLI feedback message indicating channel state information. The operations of 1635 may be performed according to the methods described herein. In some examples, aspects of the operations of 1635 may be described with reference to Figures 8 to 9 The CSI reporting manager described here is used to perform the

[0300] Fig.17 A flow chart illustrating a method 1700 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The operations of the method 1700 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1700 may be implemented by a UE 115 or a component thereof as described herein. Figures 7 to 10 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0301] At 1705, the UE may receive a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set. The operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed as described with reference to Figures 8 to 9 Describes the configuration manager to perform.

[0302] At 1710, the UE may determine a configuration indicating a reference signal resource set in at least one reference signal resource set. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed as described with reference to Fig. 9 The multi-SRS RS manager described is executed.

[0303] At 1715, the UE may select a reference signal resource from a set of reference signal resources based on the previously determined channel state information. The operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed as described with reference to Fig. 9 The multi-SRS RS manager described is executed.

[0304] At 1720, the UE may determine the number of spatial layers of the CLI associated with the interfering device based on the usage information. The operations of 1720 may be performed according to the methods described herein. In some examples, aspects of the operations of 1720 may be performed as described with reference to Figures 8 to 9 The spatial layer manager described is used to perform the

[0305] At 1725, the UE may determine, based on the configuration, that the usage information for the selected reference signal resource includes usage based on a codebook. The operations of 1725 may be performed according to the methods described herein. In some examples, aspects of the operations of 1725 may be as described with reference to Fig. 9 The multi-SRS RS manager described is executed.

[0306] At 1730, the UE may determine the number of spatial layers of the CLI including the number of antenna ports of the reference signal resources based on the use of the codebook. The operations of 1730 may be performed according to the methods described herein. In some examples, aspects of the operations of 1730 may be as described with reference to Fig. 9 The multi-SRS RS manager described is executed.

[0307] At 1735, the UE may determine channel state information associated with the CLI based on the number of spatial layers. The operations of 1735 may be performed according to the methods described herein. In some examples, aspects of the operations of 1735 may be as described with reference to Figures 8 to 9 Described in the CSI Manager to perform.

[0308] At 1740, the UE may send a CLI feedback message indicating channel state information. The operations of 1740 may be performed according to the methods described herein. In some examples, aspects of the operations of 1740 may be as described with reference to Figures 8 to 9 The CSI reporting manager described here is used to perform the

[0309] Fig.18 A flow chart illustrating a method 1800 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The operations of the method 1800 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1800 may be implemented by a base station 105 or components thereof as described herein. Figures 11 to 14 In some examples, the base station may execute an instruction set to control the functional units of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0310] At 1805, the base station may determine at least one reference signal resource set and usage information for at least one reference signal resource set for CLI measurement by the UE of the CLI from the interfering device. The operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed as described with reference to Figures 12 to 13 The description is performed using a manager.

[0311] At 1810, the base station may send a configuration for sending a CLI feedback message to the UE, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from the interfering device, and the configuration further indicating usage information for the at least one reference signal resource set. The operations of 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of 1810 may be performed as described with reference to Figures 12 to 13 Describes the configuration manager to perform.

[0312] At 1815, the base station may receive a CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information. The operations of 1815 may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be performed as described with reference to Figures 12 to 13 The CSI reporting manager described here is used to perform the

[0313] Fig.19 A flow chart illustrating a method 1900 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The operations of the method 1900 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1900 may be implemented by a base station 105 or components thereof as described herein. Figures 11 to 14 In some examples, the base station may execute an instruction set to control the functional units of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0314] At 1905, the base station may determine at least one reference signal resource set and usage information for at least one reference signal resource set for CLI measurement by the UE of the CLI from the interfering device. The operations of 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed as described with reference to Figures 12 to 13 The description is executed using a manager.

[0315] At 1910, the base station may determine that usage information for at least one reference signal resource set includes non-codebook based usage. The operations of 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed as described with reference to Fig.13 The described non-codebook usage manager is executed.

[0316] At 1915, the base station may send a configuration for sending a CLI feedback message to the UE, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from the interfering device, and the configuration further indicating usage information for the at least one reference signal resource set. The operations of 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed as described with reference to Figures 12 to 13 Describes the configuration manager to perform.

[0317] At 1920, the base station may include an indication of the number of spatial layers in the configuration. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be described with reference to Figures 12 to 13 Describes the configuration manager to perform.

[0318] At 1925, the base station may receive a CLI feedback message from the UE indicating channel state information associated with the CLI, the channel state information being based on the usage information. The operations of 1925 may be performed according to the methods described herein. In some examples, aspects of the operations of 1925 may be performed as described with reference to Figures 12 to 13 The CSI reporting manager described here is used to perform the

[0319] Fig. 20 A flow chart illustrating a method 2000 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The operations of the method 2000 may be implemented by an IAB node (which may be an example of a base station 105 or UE 115 or components thereof as described herein). For example, the operations of the method 2000 may be implemented by a node as described with reference to Figures 7 to 9 11 to 14 described by the communication manager. In some examples, the IAB node can execute an instruction set to control the functional unit of the IAB node to perform the functions described below. Additionally or alternatively, the IAB node can use dedicated hardware to perform various aspects of the functions described below.

[0320] At 2005, the IAB node may receive from the parent IAB node a CSI report configuration for generating a CSI report associated with monitoring of at least one CSI-RS resource set by the IAB node, the configuration also indicating usage information for the at least one CSI-RS resource set. The operations of 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed as described with reference to Figures 12 to 13 The description is executed using a manager.

[0321] At 2010, the IAB node may send a CSI resource configuration to the downstream node, the CSI resource configuration indicating the number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information. The operations of 2010 may be performed according to the methods described herein. In some examples, aspects of the operations of 2010 may be performed as described with reference to Fig. 9 and 13 The described non-codebook usage manager is executed.

[0322] At 2015, the IAB node may receive a CSI report from a downstream node indicating CSI associated with cross-link interference based at least in part on the number of spatial layers. The operations of 2015 may be performed according to the methods described herein. In some examples, aspects of the operations of 2015 may be performed as described with reference to Figures 8 to 9 or the configuration manager described in 12 to 13.

[0323] Fig.21 A flow chart illustrating a method 2100 for supporting channel state reporting based on SRS resource usage in full duplex according to aspects of the present disclosure is shown. The operations of the method 2100 may be implemented by an IAB node (which may be an example of a base station 105 or UE 115 or components thereof as described herein). For example, the operations of the method 2100 may be implemented by a node as described with reference to Figures 7 to 9 11 to 14 described by the communication manager. In some examples, the IAB node can execute an instruction set to control the functional unit of the IAB node to perform the functions described below. Additionally or alternatively, the IAB node can use dedicated hardware to perform various aspects of the functions described below.

[0324] At 2105, the IAB node may send to the parent IAB node an SRS measurement configuration for measuring cross-link interference on at least one reference signal resource set to be used by the downstream node when sending the SRS, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on the usage information for the at least one reference signal resource set. The operations of 2105 may be performed according to the methods described herein. In some examples, aspects of the operations of 2105 may be performed as described with reference to Figures 12 to 13 The description is executed using a manager.

[0325] At 2110, the IAB node may send an SRS transmission configuration to a downstream node indicating at least one reference signal resource set to be used when transmitting an SRS, the configuration indicating usage information for at least one reference signal resource set. The operations of 2110 may be performed according to the methods described herein. In some examples, aspects of the operations of 2110 may be performed as described with reference to Fig. 9 and 13The described non-codebook usage manager is executed.

[0326] At 2115, the IAB node may receive an uplink resource configuration from the parent IAB node, the uplink resource configuration being based at least in part on measuring a CLI determined from the SRS and based at least in part on the number of spatial layers. The operations of 2115 may be performed according to the methods described herein. In some examples, aspects of the operations of 2115 may be performed as described with reference to Figures 8 to 9 or the configuration manager described in 12 to 13.

[0327] The following provides a summary of various aspects of the disclosure:

[0328] Aspect 1: A method for wireless communication at an IAB node, comprising: receiving a CSI report configuration from a parent IAB node for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node, the configuration also indicating usage information for the at least one CSI-RS resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating the number of spatial layers of a CLI associated with the parent IAB node based at least in part on the usage information; and receiving the CSI report indicating CSI from the downstream node, the CSI being associated with the CLI based at least in part on the number of spatial layers.

[0329] Aspect 2: The method according to aspect 1 also includes: identifying a number of interfering spatial layers based at least in part on the CSI report, wherein the number of interfering spatial layers is equal to or less than the number of CSI-RS ports associated with the at least one CSI-RS resource set.

[0330] Aspect 3: The method according to any one of aspects 1 to 2 further includes: identifying a PMI associated with a number of interfering spatial layers based at least in part on the CSI report.

[0331] Aspect 4: The method according to any one of Aspects 1 to 3 further includes: sending a second CSI report to the parent IAB node according to the CSI report configuration, wherein the second CSI report indicates the CSI obtained at least in part based on monitoring the at least one CSI-RS resource set, and the second CSI report indicates the CSI report received from the downstream node.

[0332] Aspect 5: The method according to any one of aspects 1 to 4, wherein the configuration is received in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0333] Aspect 6: The method according to any one of aspects 1 to 5, wherein the CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

[0334] Aspect 7: The method according to any one of aspects 1 to 6, wherein the downstream node comprises a downstream IAB node or a UE.

[0335] Aspect 8: A method for wireless communication at an IAB node, comprising: sending a sounding reference signal measurement configuration to a parent IAB node for the parent IAB node to measure a CLI on at least one reference signal resource set to be used by a downstream node when sending a sounding reference signal, the configuration also indicating the number of spatial layers of the CLI associated with the downstream node based at least in part on usage information for the at least one reference signal resource set; sending a sounding reference signal transmission configuration to the downstream node indicating the at least one reference signal resource set to be used when sending the sounding reference signal, the configuration indicating the usage information for the at least one reference signal resource set; and receiving an uplink resource configuration from the parent IAB node, the uplink resource configuration being at least in part based on the CLI determined by the measurement according to the sounding reference signal and at least in part based on the number of spatial layers.

[0336] Aspect 9: The method according to aspect 8, wherein the sounding reference signal measurement configuration is sent in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0337] Aspect 10: The method according to any one of aspects 8 to 9, wherein the CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

[0338] Aspect 11: A method for wireless communication at a UE, comprising: receiving a configuration for sending a CLI feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for CLI from an interfering device, the configuration also indicating usage information for the at least one reference signal resource set; determining the number of spatial layers of the CLI associated with the interfering device based at least in part on the usage information; determining CSI associated with the CLI based at least in part on the number of spatial layers; and sending the CLI feedback message indicating the CSI.

[0339] Aspect 12: The method according to aspect 11, wherein receiving the configuration includes: receiving an indication of the number of antenna ports of at least one reference signal resource in the at least one reference signal resource set together with the configuration.

[0340] Aspect 13: The method according to any one of Aspects 11 to 12 also includes: determining that the configuration indicates a reference signal resource in the at least one reference signal resource set; determining, at least in part based on the configuration, the usage information for the reference signal resource, including codebook-based usage; and determining, at least in part based on the codebook-based usage, the number of spatial layers of the CLI, including the number of antenna ports for the reference signal resources in the at least one reference signal resource set.

[0341] Aspect 14: The method according to any one of Aspects 11 to 13 further includes: determining that the configuration indicates multiple reference signal resources in the at least one reference signal resource set; selecting a reference signal resource from the multiple reference signal resources based at least in part on a previously determined CSI; determining usage information for the selected reference signal resource based at least in part on the configuration, including codebook-based usage; and determining the number of spatial layers of the CLI, including the number of antenna ports of the reference signal resource, based at least in part on the codebook-based usage.

[0342] Aspect 15: The method according to any one of aspects 11 to 14, wherein receiving the configuration includes: receiving an indication of the number of spatial layers of the CLI associated with the interfering device together with the configuration.

[0343] Aspect 16: The method according to Aspect 15 also includes: determining, at least in part based on the configuration, the usage information for the at least one reference signal resource set, including non-codebook-based usage and the number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources is equal to or less than the number of spatial layers of the uplink transmission from the interfering device; and determining, at least in part based on the number of reference signal resources being equal to or less than the number of spatial layers and the non-codebook-based usage, the number of spatial layers of the CLI, including the number of reference signal resources.

[0344] Aspect 17: The method according to any one of Aspects 15 to 16 also includes: determining, at least in part based on the configuration, the usage information for the at least one reference signal resource set, including non-codebook-based usage and the number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources is greater than the number of spatial layers of the uplink transmission from the interfering device; and determining, at least in part based on the number of reference signal resources being greater than the number of spatial layers and the non-codebook-based usage, the number of spatial layers of the CLI, including the number of spatial layers configured for the uplink transmission.

[0345] Aspect 18: The method according to any one of Aspects 11 to 17 further includes: identifying a reference signal resource subset of the at least one reference signal resource set based at least in part on a previous CSI associated with each reference signal resource; determining the usage information for the at least one reference signal resource set including non-codebook based usage based at least in part on the configuration; and determining the CSI associated with the CLI for the reference signal resource subset based at least in part on the non-codebook based usage and the number of spatial layers of the CLI.

[0346] Aspect 19: The method according to any one of Aspects 11 to 18 further includes: identifying a reference signal resource in the at least one reference signal resource set based at least in part on a previous CSI associated with each reference signal resource; determining the usage information for the at least one reference signal resource set based at least in part on the configuration, including codebook-based usage; and determining the CSI associated with the CLI for the reference signal resource based at least in part on the codebook-based usage and the number of spatial layers of the CLI.

[0347] Aspect 20: The method according to any one of Aspects 11 to 19 further includes: determining, at least in part based on the configuration, that the usage information for the at least one reference signal resource set includes non-codebook based usage; and sending the CLI feedback message based at least in part on the non-codebook based usage, the CLI feedback message indicating the CSI for a reference signal resource subset in the at least one reference signal resource set.

[0348] Aspect 21: The method according to any one of Aspects 11 to 20 further includes: determining, at least in part based on the configuration, that the usage information for the at least one reference signal resource set includes codebook-based usage; and sending the CLI feedback message based at least in part on the codebook-based usage, the CLI feedback message indicating the CSI for the reference signal resources in the at least one reference signal resource set.

[0349] Aspect 22: The method according to any one of Aspects 11 to 21, wherein the CLI feedback message indicates an SRI associated with the CLI.

[0350] Aspect 23: The method according to aspect 22, wherein the CLI feedback message indicates an SRI based at least in part on the usage information for the at least one reference signal resource set, including based on the usage of a codebook.

[0351] Aspect 24: A method according to any one of Aspects 22 to 23, wherein the CLI feedback message includes, based at least in part on the usage information for the at least one reference signal resource set, indicating a number of SRIs equal to the number of spatial layers of the CLI associated with the interfering device based on non-codebook usage.

[0352] Aspect 25: The method according to any one of aspects 11 to 24, wherein the configuration is received in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0353] Aspect 26: The method according to any one of aspects 11 to 25, wherein the CSI is based at least in part on the UE operating in full-duplex communication with the interfering device.

[0354] Aspect 27: A method for wireless communication at a base station, comprising: determining at least one reference signal resource set and usage information for the at least one reference signal resource set for CLI measurement by a UE of a CLI from an interfering device; sending a configuration for sending a CLI feedback message to the UE, the configuration indicating the at least one reference signal resource set to be monitored by the UE for the CLI from the interfering device, the configuration also indicating the usage information for the at least one reference signal resource set; and receiving the CLI feedback message from the UE indicating CSI associated with the CLI, the CSI being based on the usage information.

[0355] Aspect 28: The method according to aspect 27 further includes: determining that the usage information for the at least one reference signal resource set includes non-codebook based usage; and including an indication of the number of spatial layers in the configuration.

[0356] Aspect 29: The method according to any one of Aspects 27 to 28 further includes: determining that the usage information for the at least one reference signal resource set includes codebook-based usage; and including in the configuration an indication of the number of antenna ports for at least one reference signal resource in the at least one reference signal resource set.

[0357] Aspect 30: The method according to any one of Aspects 27 to 29 further includes: determining that there are multiple interfering devices associated with the UE, each interfering device being associated with a corresponding reference signal resource set having the same usage information; and combining the corresponding reference signal resource set for each interfering device into the indication of the at least one reference signal resource set based at least in part on the same usage information.

[0358] Aspect 31: The method according to aspect 30 further includes: identifying an interference level associated with at least one interfering device of the plurality of interfering devices based at least in part on the SRI and the associated CLI level indicated in the CLI message.

[0359] Aspect 32: A method according to any one of Aspects 27 to 31, wherein the configuration indicating the usage information for the at least one reference signal resource set includes non-codebook based usage, comprising: receiving the CLI feedback message at least partially based on the non-codebook based usage, the CLI feedback message indicating the CSI for a subset of reference signal resources in the at least one reference signal resource set.

[0360] Aspect 33: A method according to any one of Aspects 27 to 32, wherein the configuration indicating the usage information for the at least one reference signal resource set includes codebook-based usage, comprising: receiving the CLI feedback message at least partially based on the codebook-based usage, the CLI feedback message indicating the CSI for the reference signal resources in the at least one reference signal resource set.

[0361] Aspect 34: A method according to any one of aspects 27 to 33, wherein the configuration is sent in at least one of the following: an RRC message, or a MAC CE, or a DCI, or a combination thereof.

[0362] Aspect 35: The method according to any one of aspects 27 to 34, wherein the CSI is based at least in part on the UE operating in full-duplex communication with the interfering device.

[0363] Aspect 36: An apparatus for wireless communication at an IAB node, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of aspects 1 to 7.

[0364] Aspect 37: An apparatus for wireless communication at an IAB node, comprising at least one unit for performing the method according to any one of aspects 1 to 7.

[0365] Aspect 38: A non-transitory computer-readable medium storing code for wireless communication at an IAB node, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 7.

[0366] Aspect 39: An apparatus for wireless communication at an IAB node, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 8 to 10.

[0367] Aspect 40: An apparatus for wireless communication at an IAB node, comprising at least one unit for performing the method according to any one of aspects 8 to 10.

[0368] Aspect 41: A non-transitory computer-readable medium storing code for wireless communication at an IAB node, the code comprising instructions executable by a processor to perform the method according to any one of aspects 8 to 10.

[0369] Aspect 42: An apparatus for wireless communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 11 to 26.

[0370] Aspect 43: An apparatus for wireless communication at a UE, comprising at least one unit for performing the method according to any one of aspects 11 to 26.

[0371] Aspect 44: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 11 to 26.

[0372] Aspect 45: An apparatus for wireless communication at a base station, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 27 to 35.

[0373] Aspect 46: An apparatus for wireless communication at a base station, comprising at least one unit for performing the method according to any one of aspects 27 to 35.

[0374] Aspect 47: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method according to any one of aspects 27 to 35.

[0375] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0376] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems 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 communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0377] The information and signals described herein may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0378] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0379] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or sent through a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented in software executed by a processor, hardware, firmware, hard wiring, or any combination of these. Features that implement the functions may also be physically located at various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0380] Computer readable medium includes both non-transitory computer storage medium and communication medium, and communication medium includes any medium that promotes the transmission of computer program from one place to another place.Non-transitory storage medium can be any available medium that can be accessed by general-purpose computer or special-purpose computer.By way of example and not limitation, non-transitory computer readable medium can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage device, or can be used for carrying or storing desired program code unit and can be accessed by general-purpose or special-purpose computer or general-purpose or special-purpose processor in the form of instruction or data structure Any other non-transitory medium.In addition, any connection is appropriately referred to as computer readable medium.For example, if software is to send from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0381] As used herein (including in the claims), "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so 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). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0382] In the accompanying drawings, similar components or features may have the same reference numeral. In addition, various components of the same type may be distinguished by following the reference numeral with a dash and a second reference numeral, the second reference numeral being used to distinguish between similar components. If only the first reference numeral is used in the specification, the description applies to any of the similar components having the same first reference numeral, without regard to the second reference numeral or other subsequent reference numerals.

[0383] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations, and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "advantageous over other examples." For the purpose of providing an understanding of the described techniques, the detailed description includes specific details. However, these techniques may be implemented without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0384] To enable those skilled in the art to implement or use the present disclosure, the description herein is provided. It will be apparent to those skilled in the art that various modifications to the present disclosure will be apparent, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: receiving a configuration for sending a cross-link interference feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for cross-link interference from an interfering device, the configuration further indicating usage information for the at least one reference signal resource set; determining a number of spatial layers of cross-link interference associated with the interfering device based at least in part on the usage information; determining channel state information associated with the cross-link interference based at least in part on the number of spatial layers; as well as The cross-link interference feedback message indicating the channel state information is sent.

2. The method according to claim 1, wherein: Receiving the configuration includes: An indication of a number of antenna ports for at least one reference signal resource in the at least one set of reference signal resources is received along with the configuration.

3. The method according to claim 1, further comprising: determining a reference signal resource in the at least one reference signal resource set indicated by the configuration; Determining the usage information for the reference signal resources based at least in part on the configuration comprises based on usage of a codebook; as well as The number of spatial layers for determining cross-link interference based at least in part on the codebook-based usage comprises a number of antenna ports of reference signal resources in the at least one set of reference signal resources.

4. The method according to claim 1, further comprising: determining that the configuration indicates a plurality of reference signal resources in the at least one reference signal resource set; selecting a reference signal resource from the plurality of reference signal resources based at least in part on previously determined channel state information; Determining the usage information for the selected reference signal resource based at least in part on the configuration comprises based on usage of a codebook; as well as The number of spatial layers for determining cross-link interference based at least in part on the codebook-based use includes a number of antenna ports for the reference signal resources.

5. The method according to claim 1, wherein: Receiving the configuration includes: An indication of the number of spatial layers of cross-link interference associated with the interfering device is received along with the configuring.

6. The method according to claim 5, further comprising: determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set including non-codebook based usage and a number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources is equal to or less than the number of spatial layers of an uplink transmission from the interfering device; as well as The number of spatial layers for determining cross-link interference includes the number of reference signal resources based at least in part on the number of reference signal resources being equal to or less than the number of spatial layers and the non-codebook based use.

7. The method according to claim 5, further comprising: determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set including non-codebook based usage and a number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources is greater than the number of spatial layers of an uplink transmission from the interfering device; as well as The number of spatial layers for determining cross-link interference based at least in part on the number of reference signal resources being greater than the number of spatial layers and the non-codebook based use includes the number of spatial layers configured for the uplink transmission.

8. The method according to claim 1, further comprising: identifying a subset of reference signal resources of the at least one set of reference signal resources based at least in part on previous channel state information associated with each reference signal resource; determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set comprises non-codebook based usage; as well as The channel state information associated with the cross-link interference for the subset of reference signal resources is determined based at least in part on the non-codebook based usage and the number of spatial layers of cross-link interference.

9. The method according to claim 1, further comprising: identifying reference signal resources in the at least one set of reference signal resources based at least in part on previous channel state information associated with each reference signal resource; Determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set comprises based on usage of a codebook; as well as The channel state information associated with the cross-link interference for the reference signal resource is determined based at least in part on the codebook-based usage and the number of spatial layers of cross-link interference.

10. The method according to claim 1, further comprising: determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set comprises non-codebook based usage; as well as The cross-link interference feedback message is sent based at least in part on the non-codebook based usage, the cross-link interference feedback message indicating the channel state information for a subset of reference signal resources in the at least one set of reference signal resources.

11. The method according to claim 1, further comprising: Determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set comprises based on usage of a codebook; as well as The cross-link interference feedback message is sent based at least in part on the codebook-based usage, the cross-link interference feedback message indicating the channel state information for reference signal resources in the at least one reference signal resource set.

12. The method according to claim 1, wherein: The cross-link interference feedback message indicates a sounding reference signal (SRS) resource indicator (SRI) associated with the cross-link interference.

13. The method according to claim 12, wherein: The cross-link interference feedback message indicates an SRI based at least in part on the usage information for the at least one reference signal resource set, including based on usage of a codebook.

14. The method according to claim 12, wherein: The cross-link interference feedback message includes, based at least in part on the usage information for the at least one reference signal resource set, indicating a number of SRIs equal to the number of spatial layers of cross-link interference associated with the interfering device based on non-codebook usage.

15. The method according to claim 1, wherein: The configuration is received in at least one of: a radio resource control (RRC) message, or a medium access control (MAC) control element (CE), or downlink control information (DCI).

16. The method according to claim 1, wherein: The channel state information is based at least in part on the UE operating in full-duplex communication with the interfering device.

17. A method for wireless communication at a base station, comprising: determining, for a cross-link interference measurement by a user equipment (UE) of cross-link interference from an interfering device, at least one reference signal resource set and usage information for the at least one reference signal resource set; sending, to the UE, a configuration for sending a cross-link interference feedback message, the configuration indicating the at least one reference signal resource set to be monitored by the UE for cross-link interference from the interfering device, the configuration further indicating the usage information for the at least one reference signal resource set; as well as The cross-link interference feedback message is received from the UE indicating channel state information associated with the cross-link interference, the channel state information being based on the usage information.

18. The method according to claim 17, further comprising: Determining the usage information for the at least one reference signal resource set comprises non-codebook based usage; as well as An indication of the number of spatial layers is included in the configuration.

19. The method according to claim 17, further comprising: Determining the usage information for the at least one reference signal resource set comprises codebook-based usage; as well as An indication of a number of antenna ports for at least one reference signal resource in the at least one reference signal resource set is included in the configuration.

20. The method of claim 17, further comprising: determining that there are a plurality of interfering devices associated with the UE, each interfering device being associated with a corresponding set of reference signal resources having the same usage information; as well as The corresponding set of reference signal resources for each interfering device is combined into the indication of the at least one set of reference signal resources based at least in part on the same usage information.

21. The method according to claim 20, further comprising: An interference level associated with at least one of the plurality of interfering devices is identified based at least in part on a sounding reference signal (SRS) resource identifier (SRI) and an associated cross-link interference level indicated in the cross-link interference feedback message.

22. The method according to claim 17, wherein: The configuration indicating that the usage information for the at least one reference signal resource set includes non-codebook based usage includes: The cross-link interference feedback message is received based at least in part on the non-codebook based usage, the cross-link interference feedback message indicating the channel state information for a subset of reference signal resources in the at least one set of reference signal resources.

23. The method according to claim 17, wherein: The configuration indicating that the usage information for the at least one reference signal resource set includes codebook-based usage includes: The cross-link interference feedback message is received based at least in part on the codebook-based usage, the cross-link interference feedback message indicating the channel state information for reference signal resources in the at least one set of reference signal resources.

24. The method of claim 17, wherein: The configuration is sent in at least one of: a radio resource control (RRC) message, or a medium access control (MAC) control element (CE), or downlink control information (DCI).

25. The method of claim 17, wherein: The channel state information is based at least in part on the UE operating in full-duplex communication with the interfering device.

26. A method for wireless communication at an integrated access and backhaul network (IAB) node, comprising: receiving, from a parent IAB node, a CSI reporting configuration for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node, the CSI reporting configuration further indicating usage information for the at least one CSI-RS resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information; as well as The CSI report is received from the downstream node indicating CSI associated with the cross-link interference based at least in part on the number of spatial layers.

27. The method according to claim 26, further comprising: A number of interfering spatial layers is identified based at least in part on the CSI report, the number of interfering spatial layers being equal to or less than a number of CSI-RS ports associated with the at least one CSI-RS resource set.

28. The method of claim 26, further comprising: A PMI associated with a number of interfering spatial layers is identified based at least in part on the CSI report.

29. The method of claim 26, further comprising: A second CSI report is sent to the parent IAB node and according to the CSI report configuration, wherein the second CSI report indicates CSI obtained based on monitoring the at least one CSI-RS resource set, and the second CSI report indicates the CSI report received from the downstream node.

30. The method of claim 26, wherein: The CSI reporting configuration is received in at least one of the following: an RRC message, or a MAC CE, or a DCI.

31. The method of claim 26, wherein: The CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

32. The method of claim 26, wherein: The downstream node includes a downstream IAB node or a UE.

33. A method for wireless communication at an integrated access and backhaul network (IAB) node, comprising: sending, to a parent IAB node, an SRS measurement configuration for measuring, by the parent IAB node, cross-link interference on at least one reference signal resource set to be used by a downstream node when sending an SRS, the SRS measurement configuration further indicating a number of spatial layers of a CLI associated with the downstream node based at least in part on usage information for the at least one reference signal resource set; sending, to the downstream node, an SRS transmission configuration indicating the at least one reference signal resource set to be used when sending the SRS, the SRS transmission configuration indicating the usage information for the at least one reference signal resource set; as well as An uplink resource configuration is received from the parent IAB node, the uplink resource configuration being based at least in part on the CLI determined from the SRS based at least in part on the measurement and based at least in part on the number of spatial layers.

34. The method of claim 33, wherein: The SRS measurement configuration is sent in at least one of the following: an RRC message, or a MAC CE, or a DCI.

35. The method of claim 33, wherein: The CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

36. An apparatus for wireless communication at a user equipment (UE), comprising: processor, a memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the following operations: receiving a configuration for sending a cross-link interference feedback message, the configuration indicating at least one reference signal resource set to be monitored by the UE for cross-link interference from an interfering device, the configuration further indicating usage information for the at least one reference signal resource set; determining a number of spatial layers of cross-link interference associated with the interfering device based at least in part on the usage information; determining channel state information associated with the cross-link interference based at least in part on the number of spatial layers; as well as The cross-link interference feedback message indicating the channel state information is sent.

37. The device according to claim 36, wherein The instructions for receiving the configuration may be executed by the processor to cause the device to perform the following operations: An indication of a number of antenna ports for at least one reference signal resource in the at least one set of reference signal resources is received along with the configuration.

38. The device according to claim 36, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: determining a reference signal resource in the at least one reference signal resource set indicated by the configuration; Determining the usage information for the reference signal resources based at least in part on the configuration comprises based on usage of a codebook; as well as The number of spatial layers for determining cross-link interference based at least in part on the codebook-based usage comprises a number of antenna ports of reference signal resources in the at least one set of reference signal resources.

39. The device according to claim 36, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: determining that the configuration indicates a plurality of reference signal resources in the at least one reference signal resource set; selecting a reference signal resource from the plurality of reference signal resources based at least in part on previously determined channel state information; Determining the usage information for the selected reference signal resource based at least in part on the configuration comprises based on usage of a codebook; as well as The number of spatial layers for determining cross-link interference based at least in part on the codebook-based use includes a number of antenna ports for the reference signal resources.

40. The apparatus of claim 36, wherein: The instructions for receiving the configuration may be executed by the processor to cause the device to perform the following operations: An indication of the number of spatial layers of cross-link interference associated with the interfering device is received along with the configuring.

41. The device according to claim 40, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set including non-codebook based usage and a number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources is equal to or less than the number of spatial layers of an uplink transmission from the interfering device; as well as The number of spatial layers for determining cross-link interference includes the number of reference signal resources based at least in part on the number of reference signal resources being equal to or less than the number of spatial layers and the non-codebook based use.

42. The device according to claim 40, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set including non-codebook based usage and a number of reference signal resources in the at least one reference signal resource set; determining that the number of reference signal resources is greater than the number of spatial layers of an uplink transmission from the interfering device; as well as The number of spatial layers for determining cross-link interference based at least in part on the number of reference signal resources being greater than the number of spatial layers and the non-codebook based use includes the number of spatial layers configured for the uplink transmission.

43. The apparatus of claim 36, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: identifying a subset of reference signal resources of the at least one set of reference signal resources based at least in part on previous channel state information associated with each reference signal resource; determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set comprises non-codebook based usage; as well as The channel state information associated with the cross-link interference for the subset of reference signal resources is determined based at least in part on the non-codebook based usage and the number of spatial layers of cross-link interference.

44. The apparatus of claim 36, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: identifying reference signal resources in the at least one set of reference signal resources based at least in part on previous channel state information associated with each reference signal resource; Determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set comprises based on usage of a codebook; as well as The channel state information associated with the cross-link interference for the reference signal resource is determined based at least in part on the codebook-based usage and the number of spatial layers of cross-link interference.

45. The apparatus of claim 36, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: Determining, based at least in part on the configuration, the usage information for the at least one reference signal resource set comprises non-codebook based usage; and The cross-link interference feedback message is sent based at least in part on the non-codebook based usage, the cross-link interference feedback message indicating the channel state information for a subset of reference signal resources in the at least one set of reference signal resources.

46. ​​The apparatus of claim 36, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: Determining the usage information for the at least one reference signal resource set based at least in part on the configuration comprises based on usage of a codebook; and The cross-link interference feedback message is sent based at least in part on the codebook-based usage, the cross-link interference feedback message indicating the channel state information for reference signal resources in the at least one reference signal resource set.

47. The apparatus of claim 36, wherein: The cross-link interference feedback message indicates a sounding reference signal (SRS) resource indicator (SRI) associated with the cross-link interference.

48. The apparatus of claim 47, wherein: The cross-link interference feedback message indicates an SRI based at least in part on the usage information for the at least one reference signal resource set, including based on usage of a codebook.

49. The apparatus of claim 47, wherein: The cross-link interference feedback message includes, based at least in part on the usage information for the at least one reference signal resource set, indicating a number of SRIs equal to the number of spatial layers of cross-link interference associated with the interfering device based on non-codebook usage.

50. The apparatus of claim 36, wherein: The configuration is received in at least one of: a radio resource control (RRC) message, or a medium access control (MAC) control element (CE), or downlink control information (DCI).

51. The apparatus of claim 36, wherein: The channel state information is based at least in part on the UE operating in full-duplex communication with the interfering device.

52. An apparatus for wireless communication at a base station, comprising: processor, a memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the following operations: determining, for a cross-link interference measurement by a user equipment (UE) of cross-link interference from an interfering device, at least one reference signal resource set and usage information for the at least one reference signal resource set; sending, to the UE, a configuration for sending a cross-link interference feedback message, the configuration indicating the at least one reference signal resource set to be monitored by the UE for cross-link interference from the interfering device, the configuration further indicating the usage information for the at least one reference signal resource set; as well as The cross-link interference feedback message is received from the UE indicating channel state information associated with the cross-link interference, the channel state information being based on the usage information.

53. The apparatus of claim 52, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: Determining the usage information for the at least one reference signal resource set comprises non-codebook based usage; and An indication of the number of spatial layers is included in the configuration.

54. The apparatus of claim 52, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: Determining the usage information for the at least one reference signal resource set comprises codebook-based usage; and An indication of a number of antenna ports for at least one reference signal resource in the at least one reference signal resource set is included in the configuration.

55. The apparatus of claim 52, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: determining that there are a plurality of interfering devices associated with the UE, each interfering device being associated with a corresponding set of reference signal resources having the same usage information; as well as The corresponding set of reference signal resources for each interfering device is combined into the indication of the at least one set of reference signal resources based at least in part on the same usage information.

56. The apparatus of claim 55, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: An interference level associated with at least one of the plurality of interfering devices is identified based at least in part on a sounding reference signal (SRS) resource identifier (SRI) and an associated cross-link interference level indicated in the cross-link interference feedback message.

57. The apparatus of claim 52, wherein: The configuration indicates that the usage information for the at least one reference signal resource set includes non-codebook based usage, and the instructions may also be executed by the processor to cause the apparatus to perform the following operations: The cross-link interference feedback message is received based at least in part on the non-codebook based usage, the cross-link interference feedback message indicating the channel state information for a subset of reference signal resources in the at least one set of reference signal resources.

58. The apparatus of claim 52, wherein: The configuration indicates that the usage information for the at least one reference signal resource set includes codebook-based usage, and the instructions may also be executed by the processor to cause the apparatus to perform the following operations: The cross-link interference feedback message is received based at least in part on the codebook-based usage, the cross-link interference feedback message indicating the channel state information for reference signal resources in the at least one set of reference signal resources.

59. The apparatus of claim 52, wherein: The configuration is sent in at least one of: a radio resource control (RRC) message, or a medium access control (MAC) control element (CE), or downlink control information (DCI).

60. The apparatus of claim 52, wherein: The channel state information is based at least in part on the UE operating in full-duplex communication with the interfering device.

61. An apparatus for wireless communication at an integrated access and backhaul network (IAB) node, comprising: processor, a memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the following operations: receiving, from a parent IAB node, a CSI reporting configuration for generating a CSI report associated with at least one CSI-RS resource set monitored by the IAB node, the CSI reporting configuration further indicating usage information for the at least one CSI-RS resource set; sending a CSI resource configuration to a downstream node, the CSI resource configuration indicating a number of spatial layers of cross-link interference associated with the parent IAB node based at least in part on the usage information; as well as The CSI report is received from the downstream node indicating CSI associated with the cross-link interference based at least in part on the number of spatial layers.

62. The device according to claim 61, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: A number of interfering spatial layers is identified based at least in part on the CSI report, the number of interfering spatial layers being equal to or less than a number of CSI-RS ports associated with the at least one CSI-RS resource set.

63. The apparatus of claim 61, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: A PMI associated with a number of interfering spatial layers is identified based at least in part on the CSI report.

64. The apparatus of claim 61, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: A second CSI report is sent to the parent IAB node and according to the CSI report configuration, wherein the second CSI report indicates CSI obtained based on monitoring the at least one CSI-RS resource set, and the second CSI report indicates the CSI report received from the downstream node.

65. The apparatus of claim 61, wherein: The CSI reporting configuration is received in at least one of the following: an RRC message, or a MAC CE, or a DCI.

66. The apparatus of claim 61, wherein: The CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

67. The apparatus of claim 61, wherein: The downstream node includes a downstream IAB node or a UE.

68. An apparatus for wireless communication at an integrated access and backhaul network (IAB) node, comprising: processor, a memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the following operations: sending, to a parent IAB node, an SRS measurement configuration for measuring, by the parent IAB node, cross-link interference on at least one reference signal resource set to be used by a downstream node when sending an SRS, the SRS measurement configuration further indicating a number of spatial layers of a CLI associated with the downstream node based at least in part on usage information for the at least one reference signal resource set; sending, to the downstream node, an SRS transmission configuration indicating the at least one reference signal resource set to be used when sending the SRS, the SRS transmission configuration indicating the usage information for the at least one reference signal resource set; as well as An uplink resource configuration is received from the parent IAB node, the uplink resource configuration being based at least in part on the CLI determined from the SRS based at least in part on the measurement and based at least in part on the number of spatial layers.

69. The apparatus of claim 68, wherein: The SRS measurement configuration is sent in at least one of the following: an RRC message, or a MAC CE, or a DCI.

70. The apparatus of claim 68, wherein: The CSI is based at least in part on the IAB node operating in full-duplex communication with the downstream node.

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