Sidelink transmission of cross-link interference information by the victim user equipment

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a victim user equipment (UE) may measure a cross-link interference strength from an aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE. The victim UE may send cross-link interference information to the aggressor UE on a sidelink channel. For example, the cross-sidelink interference information sent to the aggressor UE may indicate at least the cross-link interference strength measured by the victim UE. Various other aspects are also provided.

Description

Technical Field

[0001] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for sidelink transmission of cross-link interference information by a victim user device. Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0003] A wireless communication network may include several base stations (BSs) that can support communications for several user equipment (UEs). User equipment (UEs) can communicate with a base station (BS) via downlinks and uplinks. The uplink (or forward link) refers to the communication link from the BS to the UE, and the downlink (or reverse link) refers to the communication link from the UE to the BS. As will be described in detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0004] The aforementioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at city, national, regional, and even global levels. New Radio (NR), also known as 5G, is a set of enhancements to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, leveraging new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to grow, further improvements to LTE and NR technologies remain valuable. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that employ them. Summary of the Invention

[0005] In some aspects, a method of wireless communication performed by a victim user equipment (UE) may include: measuring a cross-link interference strength from an attacker UE based at least in part on an uplink transmission from the attacker UE colliding with a downlink transmission to the victim UE; and sending cross-link interference information to the attacker UE on a sidelink channel, wherein the cross-link interference information sent to the attacker UE at least indicates the cross-link interference strength.

[0006] In some aspects, a victim UE for wireless communication may include: a memory; and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to: measure a cross-link interference strength from an aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE; and send cross-link interference information to the aggressor UE on a sidelink channel, wherein the cross-link interference information sent to the aggressor UE indicates at least the cross-link interference strength.

[0007] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a victim UE, may cause the one or more processors to: measure a cross-link interference strength from an aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE; and send cross-link interference information to the aggressor UE on a sidelink channel, wherein the cross-link interference information sent to the aggressor UE indicates at least the cross-link interference strength.

[0008] In some aspects, an apparatus for wireless communication may include: a component for measuring a cross-link interference strength from an attacker UE based at least in part on an uplink transmission from the attacker UE colliding with a downlink transmission to the apparatus; and a component for sending cross-link interference information to the attacker UE on a sidelink channel, wherein the cross-link interference information sent to the attacker UE at least indicates the cross-link interference strength.

[0009] In some aspects, a method of wireless communication performed by an aggressor UE may include: receiving cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength that is at least partially based on uplink transmissions from the aggressor UE conflicting with downlink transmissions to the victim UE; and adjusting one or more uplink transmissions to mitigate performance loss at the victim UE based at least in part on the cross-link interference information.

[0010] In some aspects, an aggressor UE for wireless communication may include: a memory; and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to: receive cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE; and adjust one or more uplink transmissions based at least in part on the cross-link interference information to mitigate performance loss at the victim UE.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of an aggressor UE, may cause the one or more processors to: receive cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE; and adjust one or more uplink transmissions based at least in part on the cross-link interference information to mitigate performance loss at the victim UE.

[0012] In some aspects, an apparatus for wireless communication may include: a component for receiving cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength, which is at least partially based on an uplink transmission from the apparatus conflicting with a downlink transmission to the victim UE; and a component for adjusting one or more uplink transmissions to mitigate performance loss at the victim UE based at least in part on the cross-link interference information.

[0013] In some aspects, a method of wireless communication performed by a base station may include: receiving information related to cross-link interference experienced at the victim UE from a victim UE, wherein the cross-link interference is at least partially based on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE; and sending configuration information for a sidelink channel to the victim UE and the aggressor UE to enable direct transmission of information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

[0014] In some aspects, a base station for wireless communication may include: a memory; and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to: receive information related to cross-link interference experienced at a victim UE from a victim UE, wherein the cross-link interference is based at least in part on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE; and send configuration information for a sidelink channel to the victim UE and the aggressor UE to enable direct transmission of information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

[0015] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to: receive, from a victim UE, information related to cross-link interference experienced at the victim UE, wherein the cross-link interference is based at least in part on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE; and send configuration information for a sidelink channel to the victim UE and the aggressor UE to enable direct transmission of information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

[0016] In some aspects, an apparatus for wireless communication may include: components for receiving information related to cross-link interference experienced at the victim UE from a victim UE, wherein the cross-link interference is at least partially based on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE; and components for sending configuration information for a sidelink channel to the victim UE and the aggressor UE to enable direct transmission of information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

[0017] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems substantially as described with reference to and as illustrated by the accompanying drawings and description.

[0018] The features and technical advantages of the examples according to the present disclosure have been outlined quite broadly above so that the subsequent detailed description may be better understood. Additional features and advantages will be described below. The concepts and specific examples disclosed may be readily used as a basis for modifying or designing other structures for implementing the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, their organization and method of operation, and the associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each figure is provided for the purpose of illustration and description and not as a definition of limitations to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order that the features of the present disclosure enumerated above may be understood in detail, a more particular description, briefly summarized above, may be made by reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only certain typical aspects of the present disclosure and are therefore not to be considered limiting of its scope, as the description may admit to other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0020] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0021] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network according to various aspects of the present disclosure.

[0022] Figure 3 is a diagram illustrating one or more examples of UE-to-UE cross-link interference according to various aspects of the present disclosure.

[0023] Figure 4 is a diagram illustrating one or more examples of sidelink transmission of cross-link interference information by a victim UE according to various aspects of the present disclosure.

[0024] Figure 5 is a diagram illustrating an example process performed, for example, by a victim UE, according to various aspects of the present disclosure.

[0025] Figure 6 is a diagram illustrating an example process performed, for example, by an attacker UE, according to various aspects of the present disclosure.

[0026] Figure 7 is a diagram illustrating example processes performed, for example, by a base station, according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0027] Various aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. On the contrary, these aspects are provided so that the present disclosure will be exhaustive and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, those skilled in the art should understand that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method that is practiced using other structures, functionality, or structures and functionality in addition to or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of the claims.

[0028] Several aspects of telecommunications systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the detailed description below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0029] It should be noted that although various aspects may be described herein using terminology generally associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied to other generation-based communication systems, such as 5G and later communication systems, including NR technology.

[0030] Figure 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include several BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or a BS subsystem serving that coverage area, depending on the context in which the term is used.

[0031] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1In the example shown, BS 110a may be a macro BS for macrocell 102a, BS 110b may be a pico BS for picocell 102b, and BS 110c may be a femto BS for femtocell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB," "base station," "NR BS," "gNB," "TRP," "AP," "Node B," "5G NB," and "cell" may be used interchangeably herein.

[0032] In some aspects, cells are not necessarily stationary, and the geographic area of ​​a cell can move depending on the location of a mobile BS. In some aspects, BSs can be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in wireless network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

[0033] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, a relay station 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay station may also be referred to as a relay BS, relay base station, relay, etc.

[0034] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0035] A network controller 130 may be coupled to a set of BSs and provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other, for example, directly or indirectly via a wireless or wired backhaul.

[0036] UEs 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart wristband)), an entertainment device (e.g., a music or video device, or satellite radio), a component or sensor of a vehicle, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0037] Some UEs 120 may be considered machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location markers, etc. that can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network such as the Internet or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices and / or may be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs may be considered customer premises equipment (CPE). The UE 120 may be included in a housing that houses components of the UE 120 (such as a processor component, a memory component, etc.).

[0038] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific radio access technology (RAT) and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0039] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e, but may alternatively include, for example, an aggressor UE that causes UE-to-UE cross-link interference to be experienced at a victim UE as described elsewhere herein) may communicate directly using one or more sidelink channels (e.g., without using the base station 110 as an intermediary to communicate with each other). For example, the UEs 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In such cases, the UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110. In some aspects, the one or more sidelink channels may include a physical sidelink control channel (PSCCH) that the two or more UEs 120 may use to communicate control information, a physical sidelink feedback channel (PSFCH) that the two or more UEs 120 may use to communicate feedback information (e.g., hybrid automatic repeat request (HARQ) feedback providing an acknowledgment (ACK) or negative acknowledgment (NACK) for a scheduled sidelink transmission), a physical sidelink shared channel (PSSCH) that the two or more UEs 120 may use to transmit data, and the like. Furthermore, in some aspects, communication over the one or more sidelink channels may occur over a carrier shared between the UE 120 and the base station 110 using a Uu interface, dedicated for sidelink communications, and the like. In some aspects, the carrier to be used for sidelink communications may be configured by the base station 110 or the UE 120 performing scheduling operations, resource selection operations, and the like. In some aspects, communication over the one or more sidelink channels may include unsupervised transmissions and / or unicast transmissions supervised by the base station 110.

[0040] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 The examples described are different.

[0041] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown. Base station 110 may be Figure 1 and UE 120 may be one of the base stations in Figure 1 Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T ≥ 1 and R ≥ 1.

[0042] At the base station 110, a transmit processor 220 may receive data for one or more UEs from a data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. In accordance with various aspects described in detail below, position coding may be utilized to generate synchronization signals to convey additional information.

[0043] At UE 120, antennas 252a through 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0044] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.) from the controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulators 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and may provide decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0045] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, or Figure 2Any other components of may perform one or more techniques associated with sidelink transmission of cross-link interference information, as described in more detail elsewhere herein. Figure 2 1. The UE 120 shown in FIG. 1 may be an aggressor UE 120agg causing UE-to-UE cross-link interference to be experienced at a victim UE 120vic or a victim UE 120vic experiencing UE-to-UE cross-link interference caused by the aggressor UE 120agg, as described elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of a can perform or direct operations such as: Figure 5 The process of 500 Figure 6 The process of 600 Figure 7 Process 700 and / or other processes as described herein, such as below in conjunction with Figure 4 The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. Thus, the memory 282 of the UE 120 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication, wherein the one or more instructions include instructions that, when executed by one or more processors of the UE 120 (e.g., the processor 258 and / or the controller / processor 280), cause and / or direct the one or more processors to perform the following referenced instructions. Figures 4 to 7 One or more instructions of one or more methods described in greater detail. In some aspects, scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0046] In some aspects, the UE 120 can include: means for measuring a cross-link interference strength from the aggressor UE 120 (e.g., using the antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.) based at least in part on an uplink transmission from the aggressor UE 120 colliding with a downlink transmission to the UE 120; means for sending cross-link interference information to the aggressor UE 120 on a sidelink channel (e.g., using the controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.), the cross-link interference information indicating at least the cross-link interference strength; etc. In some aspects, such means can include means for combining Figure 2One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0047] Additionally or alternatively, in some aspects, the UE 120 may include: means for receiving cross-link interference information from the victim UE 120 on a sidelink channel (e.g., using the antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.), the cross-link interference information indicating at least a cross-link interference strength based at least in part on an uplink transmission from the apparatus colliding with a downlink transmission to the victim UE; means for adjusting one or more uplink transmissions based at least in part on the cross-link interference information to mitigate performance loss at the victim UE (e.g., using the controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.); etc. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0048] In some aspects, the base station 110 can include: means for receiving information related to cross-link interference experienced at the victim UE 120 from the victim UE 120 (e.g., using the antenna 234, the DEMOD 232, the MIMO detector 236, the receive processor 238, the controller / processor 240, etc.) based at least in part on an uplink transmission from the aggressor UE 120 colliding with a downlink transmission to the victim UE 120; means for sending configuration information for a sidelink channel to the victim UE 120 and the aggressor UE 120 to enable direct transmission of information related to cross-link interference from the victim UE 120 to the aggressor UE 120 via the sidelink channel (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, etc.); etc. In some aspects, such means can include a combination of Figure 2One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0049] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 The examples described are different.

[0050] Figure 3 is a diagram illustrating one or more examples 300 of UE-to-UE cross-link interference according to various aspects of the present disclosure.

[0051] like Figure 3 As shown and indicated by reference numeral 310, UE-to-UE cross-link interference may occur in a first scenario in which a first base station 110-1 may provide a first cell for serving a first UE 120agg, and a second base station 110-2 may provide a second cell adjacent to the first cell for serving a second UE 120vic. In some cases, dynamic time division duplex (TDD) configuration may cause UE-to-UE cross-link interference (CLI). For example, when a first UE 120agg sends an uplink (UL) transmission on an uplink symbol in the first cell, the uplink transmission may conflict with a downlink (DL) transmission to the second UE 120vic on a downlink symbol in the second cell. In this case, the first UE 120agg may be referred to herein as an aggressor UE 120agg causing UE-to-UE cross-link interference, and the second UE 120vic may be referred to herein as a victim UE 120vic experiencing UE-to-UE cross-link interference. In general, UE-to-UE cross-link interference may more easily occur at the cell edge between neighboring cells and may result in degradation of the signal-to-noise-and-interference ratio (SINR) for the victim UE 120vic. For example, neighboring cells may be associated with different TDD configurations or time division multiplexing (TDM) patterns, which may result in UE-to-UE cross-link interference if a first cell is associated with a first TDD configuration or TDM pattern that includes one or more uplink (interfering symbols) that coincide or otherwise collide with one or more downlink (interfered symbols) in a nearby neighboring cell.

[0052] Additionally or alternatively, as shown by reference numeral 320, UE-to-UE cross-link interference may occur in a second scenario in which a single base station 110 provides a cell to provide coverage to both an aggressor UE 120agg and a victim UE 120vic. For example, in some aspects, the base station 110 may provide full-duplex capability that enables concurrent uplink and downlink transmissions. In this case, the aggressor UE 120agg and / or the victim UE 120vic may be provided with a TDD configuration and / or TDM mode that enables concurrent uplink and downlink transmissions. For example, in some aspects, the TDD configuration and / or TDD mode that enables concurrent uplink and downlink transmissions may be provided to all UEs in the cell via cell-specific signaling (e.g., radio resource control (RRC) signaling), or may be provided to individual UEs with full-duplex capability via UE-specific signaling. Therefore, UE-to-UE cross-link interference may occur in an intra-cell scenario where the aggressor UE 120agg transmits on the uplink in symbols that the victim UE 120vic will receive a downlink transmission, which may cause cross-link interference at the victim UE 120vic.

[0053] In some circumstances, the aggressor UE 120agg may be configured to adjust uplink transmissions that cause UE-to-UE cross-link interference to the victim UE 120vic in order to mitigate the performance loss (e.g., degraded SINR) experienced at the victim UE 120vic. For example, the aggressor UE 120agg may be configured to perform a transmit power control procedure that enables the aggressor UE 120agg to adjust (e.g., reduce) uplink transmit power based, at least in part, on physical uplink shared channel (PUSCH) transmit power, maximum configured output power, target receive power at the base station 110, and / or other factors. Generally speaking, the aggressor UE 120agg may rely on having applicable cross-link interference measurements so that the aggressor UE 120 can take appropriate actions to mitigate the UE-to-UE cross-link interference experienced at the victim UE 120vic. However, when the victim UE 120vic is experiencing UE-to-UE cross-link interference from the aggressor UE 120agg, there may not be any UE-to-UE cross-link interference experienced or otherwise measurable at the aggressor UE 120agg.

[0054] Therefore, in some cases, the victim UE 120vic may measure the cross-link interference experienced at the victim UE 120vic and report the measured cross-link interference to the base station, which then decides whether to provide the cross-link interference information to the aggressor UE 120agg. This may result in inefficiencies in notifying the aggressor UE 120agg about the UE-to-UE cross-link interference experienced at the victim UE 120vic, as the cross-link interference information must travel multiple hops before reaching the aggressor UE 120agg. Furthermore, in the event that the base station decides not to notify the aggressor 120agg about the cross-link interference, the victim UE 120vic may continue to experience performance degradation due to the uplink transmission by the aggressor 120agg colliding with the downlink transmission to the victim 120vic. Thus, some aspects described herein enable a victim UE 120vic to provide information related to cross-link interference directly to an aggressor UE 120agg via one or more sidelink channels, so that the aggressor UE 120agg can adjust uplink transmissions that cause cross-link interference to mitigate performance loss at the victim UE 120vic. In this manner, the likelihood of the aggressor UE 120agg causing cross-link interference at the victim UE 120vic is reduced, thereby improving network communications, and directly sending cross-link interference information via sidelink channel(s) can improve network capacity and efficiency.

[0055] As indicated above, Figure 3 are provided as examples. Other examples can be compared with Figure 3 The examples described are different.

[0056] Figure 4 4 is a diagram illustrating one or more examples 400 of sidelink transmission of cross-link interference information by a victim UE according to various aspects of the present disclosure. Figure 4 As shown, example(s) 400 include a victim UE 120vic transmitting cross-link interference information directly to the aggressor UE 120agg via one or more sidelink channels based at least in part on the UE-to-UE cross-link interference caused at the victim UE 120vic by the aggressor UE 120agg. Furthermore, in some aspects, example(s) 400 may include a base station 110 facilitating establishment of a sidelink configuration between the victim UE 120vic and the aggressor UE 120agg to enable sidelink transmission of the cross-link interference information from the victim UE 120vic to the aggressor UE 120agg.

[0057] like Figure 4As shown and indicated by reference numeral 410, the victim UE 120vic may measure a cross-link interference strength experienced at the victim UE 120vic based at least in part on detecting one or more uplink symbols transmitted by the aggressor UE 120agg that collide with one or more downlink symbols of the victim UE 120vic. For example, in some aspects, the cross-link interference strength may be measured at least in part based on a received signal strength indicator (RSSI), which may be measured as a linear average of the total received power observed by the victim UE 120vic in certain OFDM symbols corresponding to measurement time resources in the frequency bandwidth to be measured. In some aspects, the resources to be used for RSSI measurement may be configured based on a symbol-level indication (e.g., a starting OFDM symbol and an ending OFDM symbol) and a physical resource block (PRB) indication (e.g., a starting PRB and an ending PRB) within the downlink effective bandwidth portion. Additionally or alternatively, the cross-link interference strength may be measured at least in part based on a reference signal received power (RSRP) associated with a sounding reference signal (SRS). For example, in some aspects, the SRS may correspond to a reference signal transmitted by the aggressor UE 120agg in the uplink direction to a base station (e.g., base station 110) to enable the base station to estimate uplink quality, evaluate uplink transmission timing, etc. Thus, in some aspects, the victim UE 120vic may measure RSRP based at least in part on a linear average of the power contributions of the SRS transmitted by the aggressor UE 120agg over a set of configured resource elements or measurement occasions, the set of configured resource elements or measurement occasions including the time and frequency resources in which the aggressor UE 120agg transmits the SRS. Additionally or alternatively, in some aspects, the cross-link interference strength may be measured based at least in part on one or more physical layer (or layer 1 (L1)) parameters measured in one or more symbols in which the uplink transmission(s) from the aggressor UE 120agg collide with the downlink transmission(s) to the victim UE 120vic (e.g., L1-RSRP, reference signal received quality (RSRQ), SINR, SNR, etc.).

[0058] like Figure 4As further shown and indicated by reference numeral 420, in the absence of an existing sidelink configured with the aggressor UE 120agg, the victim UE 120vic may transmit, and the base station 110 may receive, feedback related to cross-link interference experienced at the victim UE 120vic. For example, in some aspects, the cross-link interference feedback may indicate a cross-link interference strength measured by the victim UE 120vic, a frequency bandwidth in which the cross-link interference strength was measured, one or more downlink symbols in which the victim UE 120vic experienced the cross-link interference, and the like.

[0059] like Figure 4 As further shown and indicated by reference numeral 430, the base station 110 may provide sidelink configuration information to the victim UE 120vic and the aggressor UE 120agg based at least in part on the cross-link interference feedback provided by the victim UE 120vic. For example, in some aspects, the sidelink configuration information may indicate a carrier frequency to be used for sidelink communications between the victim UE 120vic and the aggressor UE 120agg. For example, the carrier frequency may be a shared carrier used for sidelink communications between the victim UE 120vic and the aggressor UE 120agg and also used for communications between the base station 110 and the victim UE 120vic and / or the aggressor UE 120agg over the Uu interface. Additionally, in some aspects, the sidelink configuration information may indicate whether the sidelink communications between the victim UE 120vic and the aggressor UE 120agg will include unsupervised unicast transmissions or unicast transmissions supervised by the base station 110.

[0060] like Figure 4 As further shown and indicated by reference numeral 440, the victim UE 120vic may transmit and the aggressor UE 120agg may receive cross-link interference information via one or more sidelink channels. For example, in some aspects, the one or more sidelink channels may be associated with an existing sidelink connection between the victim UE 120vic and the aggressor UE 120agg, or the sidelink connection may be established based on sidelink configuration information provided by the base station 110 in the absence of an existing sidelink connection between the victim UE 120vic and the aggressor UE 120agg.

[0061] In general, the cross-link interference information sent to the aggressor UE 120agg may include at least the cross-link interference strength measured by the victim UE 120vic. For example, as described above, the cross-link interference strength may be based at least in part on: RSSI measured as a linear average of the total received power observed by the victim UE 120vic in certain OFDM symbols, RSRP measured as a linear average of the power contribution of the SRS transmitted by the aggressor UE 120agg over a set of configured resource elements or measurement opportunities, one or more physical layer (or L1) parameters measured in one or more symbols in which (multiple) uplink transmissions from the aggressor UE 120agg collide with (multiple) downlink transmissions to the victim UE 120vic, etc. In addition, in some aspects, the cross-link interference information sent to the aggressor UE 120agg may also include: the frequency bandwidth in which the cross-link interference is measured by the victim UE 120vic and / or information related to one or more downlink symbols in which the victim UE 120vic experiences cross-link interference from the aggressor UE 120agg. In the latter case, the downlink symbol(s) in which victim UE 120vic experiences cross-link interference from aggressor UE 120agg may be explicitly indicated in the cross-link interference information, or the interfered downlink symbol(s) may be implicitly indicated. For example, victim UE 120vic may send information related to a downlink symbol pattern configured for victim UE 120vic or a TDM configuration (e.g., an uplink / downlink configuration) including uplink and downlink symbols for each time slot to aggressor UE 120agg. In this case, aggressor UE 120agg may determine which downlink symbols of victim UE 120vic are affected by uplink symbols of aggressor UE 120agg that cause cross-link interference at victim UE 120vic.

[0062] In some aspects, when sending cross-link interference information to the aggressor UE 120agg, the victim UE 120vic may send information scheduling the transmission of the cross-link interference to the aggressor UE 120agg via a physical sidelink control channel (PSCCH). In addition, in some aspects, the cross-link interference information may be sent via the PSCCH, or the cross-link interference information may be sent via a physical sidelink shared channel (PSSCH) scheduled by the PSCCH. For example, in the case where the cross-link interference information has a size that fails to meet a threshold (e.g., where the cross-link interference information only includes the cross-link interference strength measured by the victim UE 120vic), the cross-link interference information may be sent via the PSCCH. Alternatively, if the cross-link interference information has a size that meets the threshold (e.g., where the cross-link interference information includes additional information such as the frequency bandwidth in which the cross-link interference is measured, the TDM mode of the victim UE 120vic, etc.), the cross-link interference information may be sent via the PSSCH.

[0063] In some aspects, the victim UE 120vic may also determine a transmit power level to use when sending cross-link interference information to the aggressor UE 120agg. For example, in some cases, an uplink beam used by the victim UE 120vic for communicating with a base station (e.g., base station 110) may be associated with a transmit power that is different from a transmit power associated with a sidelink beam used for direct communication with the aggressor UE 120agg via sidelink channel(s). In this case, the victim UE 120vic may determine an appropriate power level to use when sending cross-link interference information to the aggressor UE 120agg.

[0064] For example, in some aspects, the victim UE 120vic may explicitly indicate at least a portion of the cross-link interference information using a transmit power associated with a sidelink beam, or the victim UE 120vic may use a transmit power associated with an uplink beam, in which case at least a portion of the cross-link interference information may be implicitly indicated. For example, rather than explicitly indicating the cross-link interference strength in the cross-link interference information sent to the aggressor UE 120agg, the aggressor UE 120agg may measure the interference from the victim UE 120vic based at least in part on channel reciprocity of the sidelink channel(s) between the victim UE 120vic and the aggressor UE 120agg. In particular, due to the channel reciprocity principle in a TDD configuration, the cross-link interference from the aggressor UE 120agg to the victim UE 120vic may be the same as the cross-link interference from the victim UE 120vic to the aggressor UE 120agg. Therefore, when the victim UE 120vic sends cross-link interference information to the aggressor UE 120agg using the transmit power associated with the uplink beam, the aggressor UE 120agg can measure the cross-link interference strength that will occur when the victim UE 120vic performs uplink transmission concurrently with downlink reception at the aggressor UE 120agg.

[0065] In some aspects, the victim UE 120vic may determine whether to use a transmit power associated with a sidelink beam or a transmit power associated with an uplink beam to transmit cross-link interference information based on one or more criteria, which may be based at least in part on the cross-link interference strength and / or one or more predefined rules. In some aspects, the criteria used by the victim UE 120vic to select an appropriate transmit power for cross-link interference information transmission may be determined from cell-specific RRC signaling, from UE-specific signaling associated with the victim UE 120vic, and the like. In some aspects, where the transmit power to be used is determined from the cross-link interference strength, the victim UE 120vic may use the transmit power associated with the uplink beam based at least in part on the cross-link interference strength satisfying a threshold. For example, in this case, the aggressor UE 120agg may be able to measure the cross-link interference experienced at the victim UE 120vic due to channel reciprocity, as described above. Alternatively, in the event that the cross-link interference strength fails to meet a threshold such that the aggressor UE 120agg may be unable to measure the cross-link interference experienced at the victim UE 120vic, the victim UE 120vic may explicitly indicate the cross-link interference information using the transmit power associated with the sidelink beam.

[0066] In another example, the victim UE 120vic may determine the transmit power to use based at least in part on the configuration of the sidelink between the victim UE 120vic and the aggressor UE 120agg. For example, if the sidelink communication between the victim UE 120vic and the aggressor UE 120agg is over a carrier shared with the base station 110 using a Uu interface, the victim UE 120vic may use the transmit power of an uplink beam to transmit the cross-link interference information, or if the sidelink communication between the victim UE 120vic and the aggressor UE 120agg is over a dedicated sidelink carrier, the victim UE 120vic may alternatively use the transmit power of a sidelink beam to transmit the cross-link interference information.

[0067] In another example, the victim UE 120vic may initially transmit cross-link interference information using the transmit power of an uplink beam to implicitly indicate the cross-link interference information, and may subsequently retransmit the cross-link interference information using the transmit power of a sidelink beam to explicitly indicate the cross-link interference information based at least in part on a lack of feedback from the aggressor UE 120agg or a lack of interference cancellation after the initial cross-link interference information transmission. For example, if the victim UE 120vic does not receive feedback from the aggressor UE 120agg or cross-link interference continues to occur after the initial cross-link interference information transmission, the victim UE 120vic may determine that the aggressor UE 120agg did not receive the initial cross-link interference information transmission or may otherwise be unable to accurately determine parameters to mitigate the cross-link interference from the initial transmission in which the cross-link interference information was implicitly indicated using the transmit power of an uplink beam. Therefore, the victim UE 120vic may use the transmit power of a sidelink beam to explicitly indicate the cross-link interference information in the retransmission.

[0068] like Figure 4As further shown and indicated by reference numeral 450, the aggressor UE 120agg may perform one or more actions based at least in part on the cross-link interference information transmitted by the victim UE 120vic via the sidelink channel(s) to mitigate the performance loss at the victim UE 120vic. For example, in some aspects, the one or more actions performed by the aggressor UE 120agg may generally include adjusting one or more uplink transmissions that may cause cross-link interference experienced at the victim UE 120vic. For example, in some aspects, the aggressor UE 120agg may reduce the uplink transmit power in all uplink symbols within a timeslot, reduce the uplink transmit power only in one or more uplink symbols of the aggressor UE 120agg that coincide with one or more downlink symbols of the victim UE 120vic, reduce the uplink power in all uplink symbols associated with the same uplink transmission (e.g., to maintain phase continuity for all symbols associated with a particular physical uplink shared channel transmission), etc. Additionally or alternatively, in a case where the aggressor UE 120agg receives cross-link interference information from multiple victim UEs 120vic, the action(s) performed by the aggressor UE 120agg to mitigate performance loss at the victim UE 120vic may adjust uplink transmissions based on: the strongest cross-link interference among the cross-link interference measurements provided by the victim UE 120vic, the average cross-link interference experienced by the victim UE 120vic, or the cross-link interference strength from one of the victim UEs 120vic having the highest priority.

[0069] As indicated above, Figure 4 are provided as examples. Other examples may differ from those with respect to Figure 4 Examples described.

[0070] Figure 5 is a diagram illustrating an example process 500, performed, for example, by a victim UE, in accordance with various aspects of the present disclosure. Example process 500 is an example of operations performed by a victim UE (eg, UE 120, victim UE 120vic, etc.) associated with sidelink transmission of cross-link interference information.

[0071] like Figure 5As shown, in some aspects, process 500 may include measuring a cross-link interference strength from an aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to a victim UE (block 510). For example, the victim UE may measure (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.) a cross-link interference strength from the aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE, as described above, for example, with reference to FIG. Figure 3 and / or Figure 4 As stated.

[0072] like Figure 5 As further shown, in some aspects, process 500 may include sending cross-link interference information to the aggressor UE on a sidelink channel, wherein the cross-link interference information sent to the aggressor UE indicates at least a cross-link interference strength (block 520). For example, the victim UE may send (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) the cross-link interference information to the aggressor UE on the sidelink channel, as described above, for example, with reference to Figure 3 and / or Figure 4 In some aspects, the cross-link interference information sent to the aggressor UE indicates at least a cross-link interference strength.

[0073] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0074] In a first aspect, process 500 includes sending information scheduling transmission of cross-link interference information to an aggressor UE via a PSCCH.

[0075] In a second aspect, alone or in combination with the first aspect, process 500 includes sending information related to the cross-link interference strength from the attacker UE to the base station, and process 500 also includes receiving configuration information for the sidelink channel from the base station, wherein the cross-link interference information is sent to the attacker UE based at least in part on the configuration information for the sidelink channel.

[0076] In a third aspect, alone or in combination with one or more of the first and second aspects, the cross-link interference strength is based at least in part on RSSI, RSRP and / or physical layer parameters measured in one or more symbols in which an uplink transmission from the aggressor UE collides with a downlink transmission to the victim UE.

[0077] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the cross-link interference information sent to the aggressor UE further indicates a frequency bandwidth in which the cross-link interference strength is measured.

[0078] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the cross-link interference information sent to the aggressor UE further indicates one or more symbols in which the uplink transmission from the aggressor UE collides with the downlink transmission to the victim UE.

[0079] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the cross-link interference information sent to the aggressor UE further indicates a TDM pattern including one or more downlink symbols for the victim UE.

[0080] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information.

[0081] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the cross-link interference information is transmitted using a transmit power associated with an uplink beam based at least in part on a cross-link interference strength satisfying a threshold.

[0082] In aspect nine, alone or in combination with one or more of aspects one to eight, cross-link interference information is transmitted using a transmit power associated with an uplink beam based at least in part on a configuration of a sidelink channel for a carrier that the victim UE will use to communicate with a base station using a Uu interface.

[0083] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the cross-link interference information is transmitted using a transmit power associated with a sidelink beam to explicitly indicate at least a portion of the cross-link interference information.

[0084] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the cross-link interference information is transmitted using a transmit power associated with the sidelink beam based at least in part on a failure of the cross-link interference strength to meet a threshold.

[0085] In a twelfth aspect, alone or in combination with one or more of aspects one to eleven, the cross-link interference information is transmitted using a transmit power associated with a sidelink beam based at least in part on a lack of feedback from the aggressor UE or one or more of interference cancellation by the aggressor UE following a previous transmission of the cross-link interference information using a transmit power associated with an uplink beam.

[0086] In a thirteenth aspect, alone or in combination with one or more of aspects one to twelfth, the cross-link interference information is transmitted at least in part based on a sidelink channel having a dedicated carrier configuration, using a transmit power associated with the sidelink beam.

[0087] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the sidelink channel used to transmit the cross-link interference information is based at least in part on a PSCCH having cross-link interference information of a magnitude that fails to meet a threshold.

[0088] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the sidelink channel used to transmit the cross-link interference information is a PSSCH based at least in part on the cross-link interference information having a size that satisfies a threshold.

[0089] although Figure 5 Example blocks of process 500 are shown, but in some aspects, process 500 may include blocks other than Figure 5 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in process 500 may be included. Additionally or alternatively, two or more of the blocks of process 500 may be executed in parallel.

[0090] Figure 6 6 is a diagram illustrating an example process 600, performed, for example, by an aggressor UE, in accordance with various aspects of the present disclosure. Example process 600 is an example of an aggressor UE (e.g., UE 120, aggressor UE 120agg, etc.) performing operations associated with sidelink transmission of cross-link interference information by a victim UE.

[0091] like Figure 6As shown, in some aspects, process 600 may include receiving cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE (block 610). For example, the aggressor UE may receive (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.) cross-link interference information from the victim UE on a sidelink channel, as described above, for example, with reference to FIG. Figure 3 and / or Figure 4 In some aspects, the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from an aggressor UE colliding with a downlink transmission to a victim UE.

[0092] like Figure 6 As further shown, in some aspects, process 600 may include adjusting one or more uplink transmissions based at least in part on the cross-link interference information to mitigate performance loss at the victim UE (block 620). For example, an aggressor UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may adjust one or more uplink transmissions based at least in part on the cross-link interference information to mitigate performance loss at the victim UE, as described above, for example, with reference to FIG. Figure 3 and / or Figure 4 As stated.

[0093] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0094] In a first aspect, process 600 includes receiving information scheduling transmission of cross-link interference information from a victim UE via a PSCCH.

[0095] In a second aspect, alone or in combination with the first aspect, process 600 includes receiving configuration information for a sidelink channel from a base station, wherein the cross-link interference information is received from a victim UE based at least in part on the configuration information for the sidelink channel.

[0096] In a third aspect, alone or in combination with one or more of the first and second aspects, the cross-link interference strength is based at least in part on: a received channel strength indicator, a reference channel received power and / or physical layer parameters measured in one or more symbols in which an uplink transmission from the aggressor UE collides with a downlink transmission to the victim UE.

[0097] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the cross-link interference information received from the victim UE further indicates a frequency bandwidth in which the cross-link interference strength is measured.

[0098] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the cross-link interference information received from the victim UE further indicates one or more symbols in which the uplink transmission from the aggressor UE collides with the downlink transmission to the victim UE.

[0099] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the cross-link interference information received from the victim UE further indicates a time division multiplexing pattern including one or more downlink symbols for the victim UE.

[0100] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information.

[0101] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the cross-link interference information is transmitted using a transmit power associated with a sidelink beam to explicitly indicate at least a portion of the cross-link interference information.

[0102] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the sidelink channel used to transmit the cross-link interference information comprises one or more of a PSCCH or a PSSCH.

[0103] although Figure 6 Example blocks of process 600 are shown, but in some aspects, process 600 may include blocks other than Figure 6 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in process 600 may be included. Additionally or alternatively, two or more of the blocks of process 600 may be executed in parallel.

[0104] Figure 7is a diagram illustrating an example process 700, for example, performed by a base station, in accordance with various aspects of the present disclosure. Example process 700 is an example of operations performed by a base station (eg, base station 110, etc.) associated with sidelink transmission of cross-link interference information by a victim UE.

[0105] like Figure 7 As shown, in some aspects, process 700 may include receiving, from a victim UE, information related to cross-link interference experienced at the victim UE, wherein the cross-link interference is based at least in part on uplink transmissions from the aggressor UE colliding with downlink transmissions to the victim UE (block 710). For example, a base station may receive (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) information related to cross-link interference experienced at the victim UE from the victim UE, as described above, for example, with reference to FIG. Figure 3 and / or Figure 4 In some aspects, the cross-link interference is based at least in part on an uplink transmission from an aggressor UE colliding with a downlink transmission to a victim UE.

[0106] like Figure 7 As further shown, in some aspects, process 700 may include sending configuration information for a sidelink channel to the victim UE and the aggressor UE to enable direct transmission of information related to cross-link interference from the victim UE to the aggressor UE via the sidelink channel (block 720). For example, the base station may send (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) configuration information for a sidelink channel to the victim UE and the aggressor UE to enable direct transmission of information related to cross-link interference from the victim UE to the aggressor UE via the sidelink channel, as described above, for example, with reference to Figure 3 and / or Figure 4 As stated.

[0107] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described above and / or in conjunction with one or more other processes described elsewhere herein.

[0108] although Figure 7 Example blocks of process 700 are shown, but in some aspects, process 700 may include blocks other than Figure 7 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in process 700 may be included. Additionally or alternatively, two or more of the blocks of process 700 may be executed in parallel.

[0109] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the aspects.

[0110] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.

[0111] As used herein, satisfying a threshold may refer to a value that is greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0112] It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limiting in any way. Thus, the operation and behavior of the systems and / or methods are described herein without reference to specific software code—it being understood that software and hardware can be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0113] Even if a specific combination of features is recorded in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of each aspect. In fact, many of these features can be combined in a manner that is not specifically recorded in the claims and / or not specifically disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of each aspect includes each dependent claim combined with each other claim in the claim set. The phrase "at least one" referenced in the list of items refers to any combination of those items, including single members. As an example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, as well as any combination of identical elements in multiples (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other sorting of a, b and c).

[0114] Unless explicitly described as such, the elements, actions or instructions used herein should not be interpreted as key or necessary elements, actions or instructions. Likewise, as used herein, the articles "a" and "an" are intended to include one or more projects and can be used interchangeably with "one or more". Additionally, as used herein, the terms "set" and "group" are intended to include one or more projects (e.g., related projects, unrelated projects, a combination of related projects and unrelated projects, etc.) and can be used interchangeably with "one or more". In the case of intending only one project, the phrase "only one" or similar language is used. Similarly, as used herein, the terms "has", "have", "having" etc. are intended to be open terms. Additionally, the phrase "based on" is intended to mean "based at least in part on", unless explicitly stated otherwise.

Claims

1. A method of wireless communication performed by a victim user equipment (UE), comprising: measuring a cross-link interference strength from the aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE; as well as Cross-link interference information is sent to the aggressor UE on a sidelink channel, wherein the cross-link interference information sent to the aggressor UE at least indicates the cross-link interference strength, and wherein the cross-link interference information is sent using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information.

2. The method according to claim 1, further comprising: Information scheduling transmission of the cross-link interference information is sent to the aggressor UE via a physical sidelink control channel.

3. The method according to claim 1, further comprising: sending information related to the cross-link interference intensity from the attacker UE to a network entity; as well as Configuration information for the sidelink channel is received from the network entity, wherein the cross-link interference information is sent to the aggressor UE based at least in part on the configuration information for the sidelink channel.

4. The method according to claim 1, wherein The cross-link interference strength is based at least in part on one or more of a received signal strength indicator, a reference signal received power, or a physical layer parameter measured in one or more symbols in which the uplink transmission from the aggressor UE collides with the downlink transmission to the victim UE.

5. The method according to claim 1, wherein The cross-link interference information sent to the aggressor UE also indicates a frequency bandwidth in which the cross-link interference strength is measured.

6. The method according to claim 1, wherein The cross-link interference information sent to the aggressor UE also indicates one or more symbols in which the uplink transmission from the aggressor UE collides with the downlink transmission to the victim UE.

7. The method according to claim 1, wherein The cross-link interference information sent to the aggressor UE also indicates a time division multiplexing pattern including one or more downlink symbols for the victim UE.

8. The method according to claim 1, wherein The cross-link interference information is transmitted using the transmit power associated with the uplink beam based at least in part on the cross-link interference strength satisfying a threshold.

9. The method according to claim 1, wherein The cross-link interference information is sent using the transmit power associated with the uplink beam based at least in part on a configuration of the sidelink channel for sharing a carrier that the victim UE will use to communicate with a network entity using a Uu interface.

10. The method according to claim 1, wherein The cross-link interference information is transmitted using a transmit power associated with a sidelink beam to explicitly indicate at least a portion of the cross-link interference information.

11. The method according to claim 10, wherein: The cross-link interference information is transmitted using the transmit power associated with the sidelink beam based at least in part on the cross-link interference strength failing to satisfy a threshold.

12. The method according to claim 10, wherein: The cross-link interference information is transmitted using the transmit power associated with the sidelink beam based at least in part on a lack of feedback from the aggressor UE or one or more of interference cancellation by the aggressor UE following a previous transmission of the cross-link interference information using the transmit power associated with the uplink beam.

13. The method according to claim 10, wherein: The cross-link interference information is transmitted based at least in part on the sidelink channel having a dedicated carrier configuration using the transmit power associated with the sidelink beam.

14. The method according to claim 1, wherein The sidelink channel used to transmit the cross-link interference information is a physical sidelink control channel based at least in part on the cross-link interference information having a magnitude that fails to satisfy a threshold.

15. The method according to claim 1, wherein The sidelink channel used to transmit the cross-link interference information is a physical sidelink shared channel based at least in part on the cross-link interference information having a magnitude satisfying a threshold.

16. A victim user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: measuring a cross-link interference strength from the aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE; as well as Cross-link interference information is sent to the aggressor UE on a sidelink channel, wherein the cross-link interference information sent to the aggressor UE at least indicates the cross-link interference strength, and wherein the cross-link interference information is sent using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information.

17. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a victim user equipment (UE), cause the one or more processors to: measuring a cross-link interference strength from the aggressor UE based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE; as well as Cross-link interference information is sent to the aggressor UE on a sidelink channel, wherein the cross-link interference information sent to the aggressor UE at least indicates the cross-link interference strength, and wherein the cross-link interference information is sent using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information.

18. An apparatus for wireless communication, comprising: means for measuring a cross-link interference strength from an aggressor user equipment (UE) based at least in part on an uplink transmission from the UE colliding with a downlink transmission to the apparatus; as well as A component for sending cross-link interference information to the aggressor UE on a sidelink channel, wherein the cross-link interference information sent to the aggressor UE at least indicates the cross-link interference strength, and wherein the cross-link interference information is sent using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information.

19. A method of wireless communication performed by an attacker user equipment (UE), comprising: receiving cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and One or more uplink transmissions are adjusted based at least in part on the cross-link interference information to mitigate performance loss at the victim UE.

20. The method according to claim 19, further comprising: Information scheduling transmission of the cross-link interference information is received from the victim UE via a physical sidelink control channel.

21. The method of claim 19, further comprising: Configuration information for the sidelink channel is received from a network entity, wherein the cross-link interference information is received from the victim UE based at least in part on the configuration information for the sidelink channel.

22. The method according to claim 19, wherein The cross-link interference strength is based at least in part on one or more of a received signal strength indicator, a reference signal received power, or a physical layer parameter measured in one or more symbols in which the uplink transmission from the aggressor UE collides with the downlink transmission to the victim UE.

23. The method according to claim 19, wherein The cross-link interference information received from the victim UE also indicates a frequency bandwidth in which the cross-link interference strength is measured.

24. The method according to claim 19, wherein The cross-link interference information received from the victim UE also indicates one or more symbols in which the uplink transmission from the aggressor UE collided with the downlink transmission to the victim UE.

25. The method according to claim 19, wherein The cross-link interference information received from the victim UE further indicates a time division multiplexing pattern including one or more downlink symbols for the victim UE.

26. The method according to claim 19, wherein The cross-link interference information is transmitted using a transmit power associated with a sidelink beam to explicitly indicate at least a portion of the cross-link interference information.

27. The method according to claim 19, wherein The sidelink channel used to transmit the cross-link interference information includes one or more of a physical sidelink control channel or a physical sidelink shared channel.

28. An attacker user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receiving cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and One or more uplink transmissions are adjusted based at least in part on the cross-link interference information to mitigate performance loss at the victim UE.

29. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of an attacker user equipment (UE), cause the one or more processors to: receiving cross-link interference information from a victim UE on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from the aggressor UE colliding with a downlink transmission to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and One or more uplink transmissions are adjusted based at least in part on the cross-link interference information to mitigate performance loss at the victim UE.

30. An apparatus for wireless communication, comprising: means for receiving cross-link interference information from a victim user equipment (UE) on a sidelink channel, wherein the cross-link interference information indicates at least a cross-link interference strength based at least in part on an uplink transmission from the apparatus colliding with a downlink transmission to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and Means for adjusting one or more uplink transmissions based at least in part on the cross-link interference information to mitigate performance loss at the victim UE.

31. A method of wireless communication performed by a network entity, comprising: receiving, from a victim user equipment (UE), information related to cross-link interference experienced at the victim UE, wherein the cross-link interference is based at least in part on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and Configuration information for a sidelink channel is sent to the victim UE and the aggressor UE to enable direct transmission of the information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

32. A network entity for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receiving, from a victim user equipment (UE), information related to cross-link interference experienced at the victim UE, wherein the cross-link interference is based at least in part on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and Configuration information for a sidelink channel is sent to the victim UE and the aggressor UE to enable direct transmission of the information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

33. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a network entity, cause the one or more processors to: receiving, from a victim user equipment (UE), information related to cross-link interference experienced at the victim UE, wherein the cross-link interference is based at least in part on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and Configuration information for a sidelink channel is sent to the victim UE and the aggressor UE to enable direct transmission of the information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

34. An apparatus for wireless communication, comprising: means for receiving, from a victim user equipment (UE), information related to cross-link interference experienced at the victim UE, wherein the cross-link interference is based at least in part on uplink transmissions from an aggressor UE colliding with downlink transmissions to the victim UE, and wherein the cross-link interference information is transmitted using a transmit power associated with an uplink beam to implicitly indicate at least a portion of the cross-link interference information; and means for sending configuration information for a sidelink channel to the victim UE and the aggressor UE to enable direct transmission of the information related to the cross-link interference from the victim UE to the aggressor UE via the sidelink channel.

35. A computer program product comprising instructions, wherein: The instructions are executable by one or more processors to cause the processors to perform the method according to any one of claims 1 to 15.

36. A computer program product comprising instructions, wherein: The instructions are executable by one or more processors to cause the processors to perform the method according to any one of claims 19 to 27.

37. A computer program product comprising instructions, wherein: The instructions are executable by one or more processors to cause the processors to perform the method according to claim 31 .

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