Uplink power control for cross-link interference scenarios

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a first user equipment (UE) may receive cross-link interference information identifying a cross-link interference strength at a second UE from a second UE; determine an uplink transmit power based at least in part on the cross-link interference strength at the second UE; and transmit on an uplink using the determined uplink transmit power. Many other aspects are provided.

Description

Technical Field

[0001] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for uplink power control for cross-link interference scenarios. Background Art

[0002] Wireless communication systems are widely deployed to provide various communication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support 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) systems. 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), which may support several user equipments (UEs) for communication. User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from BSs to UEs, and uplinks (or reverse links) refer to the communication link from UEs to BSs. As will be described in more detail herein, BSs may be referred to as NodeBs, gNBs, access points (APs), radio heads, transmit receive points (TRPs), new radio (NR) BSs, 5G NodeBs, etc.

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

[0005] In some aspects, a method of wireless communication performed by a first user equipment (UE) may include: receiving cross-link interference information identifying a cross-link interference strength at the second UE from a second UE; determining an uplink transmit power based at least in part on the cross-link interference strength at the second UE; and transmitting on an uplink using the uplink transmit power based at least in part on the determined uplink transmit power.

[0006] In some aspects, a first 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 identifying a cross-link interference strength at the second UE from a second UE; determine an uplink transmit power based at least in part on the cross-link interference strength at the second UE; and transmit on the uplink using the determined uplink transmit power.

[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 first UE, may cause the one or more processors to: receive cross-link interference information identifying a cross-link interference strength at the second UE from a second UE; determine an uplink transmit power based at least in part on the cross-link interference strength at the second UE; and transmit on the uplink using the determined uplink transmit power.

[0008] In some aspects, an apparatus for wireless communication may include: a component for receiving cross-link interference information identifying a cross-link interference strength at a second UE from a second UE; a component for determining an uplink transmit power based at least in part on the cross-link interference strength at the second UE; and a component for transmitting on an uplink using the determined uplink transmit power.

[0009] 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 as generally described and illustrated herein with reference to and through the accompanying drawings and description.

[0010] The features and technical advantages of the examples according to the present disclosure have been summarized quite extensively above so that the following detailed description may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as the basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent structures do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and methods of operation, and 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 limitation to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to enable a detailed understanding of the above features of the present disclosure, a more specific description briefly summarized above may be obtained by reference to some aspects, some of which are shown in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of the present disclosure and are therefore not to be considered as limiting the scope thereof, as the specification may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0012] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0013] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network in accordance with various aspects of the present disclosure.

[0014] Figure 3A and Figure 3B is a schematic diagram illustrating an example of cross-link interference in a sidelink communication scenario according to various aspects of the present disclosure.

[0015] FIG. 4A to FIG. 4C is a schematic diagram illustrating an example of uplink power control for cross-link interference in a sidelink communication scenario according to various aspects of the present disclosure.

[0016] Figure 5 is a schematic diagram illustrating example processing performed, for example, by a user device according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0017] Various aspects of the present disclosure are described more fully below 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. Rather, these aspects are provided to make the present disclosure in-depth and complete, and to fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art 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 may 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, wherein a structure and function or a structure or function other than or different from the aspects of the present disclosure set forth herein is used to practice. It should be understood that any aspect of the disclosure disclosed herein may be implemented by one or more elements of the claims.

[0018] Several aspects of the communication system will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms and / or the like (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0019] It should be noted that although terms generally associated with 3G and / or 4G wireless technologies may be used herein to describe various aspects, aspects of the present disclosure may be applied to communication systems based on other generations, such as 5G and beyond including NR technology.

[0020] Figure 11 is a schematic 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, NodeB, gNB, 5G nodeB (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 a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0021] A BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) 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 1 In the example shown, BS 110a may be a macro BS of macro cell 102a, BS 110b may be a pico BS of pico cell 102b, and BS 110c may be a femto BS of femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5GNB", and "cell" may be used interchangeably herein.

[0022] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

[0023] 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 a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0024] 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 effects 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 low transmit power level (e.g., 0.1 to 2 watts).

[0025] A network controller 130 may be coupled to a set of BSs and may 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 directly or indirectly, for example, via a wireless or wired backhaul.

[0026] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a notebook 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 biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0027] Some UEs may be considered to be 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 tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node may provide connectivity to or with a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered to be Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered to be customer premises equipment (CPE). UE 120 may be included in a housing that houses components of UE 120 (e.g., processor components, memory components, etc.).

[0028] Generally, 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, channel, etc. In order to avoid interference between wireless networks of different RATs, each frequency can support a single RAT in a given geographic area. In some cases, NR or 5G RAT networks can be deployed.

[0029] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may use peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110. In some aspects, the one or more sidelink channels may include a physical sidelink control channel (PSCCH) that two or more UEs 120 may use to communicate control information, a physical sidelink feedback channel (PSFCH) that two or more UEs 120 may use to communicate feedback information (e.g., hybrid automatic repeat request (HARQ) feedback to provide an acknowledgement (ACK) or negative acknowledgement (NACK) for a scheduled sidelink transmission), a physical sidelink shared channel (PSSCH) that two or more UEs 120 may use to transmit data, etc. In addition, in some aspects, communication on the one or more sidelink channels may occur on a carrier shared with a Uu interface between the UE 120 and the base station 110, dedicated to sidelink communication, etc. In some aspects, the carrier to be used for sidelink communication may be configured by the base station 110 or by the UE 120 performing scheduling operations, resource selection operations, etc. In some aspects, communication on the one or more sidelink channels may include unsupervised transmissions and / or unicast transmissions supervised by the base station 110.

[0030] As described above, Figure 1 are provided as examples. Other examples may be relevant to Figure 1 Different than described.

[0031] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be 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.

[0032] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indication (CQI) received from the UE, process (e.g., decode and modulate) 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), etc.) 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 (MOD) 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 also 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. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information.

[0033] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations, and may provide received signals to demodulators (DEMODs) 254a to 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 also 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 to 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 indication (RSSI), reference signal received quality (RSRQ), channel quality indication (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0034] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). 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 antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and 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.

[0035] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other components of 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 the can execute or guide e.g. Figure 5 The operations of the process 500 and / or other processes described herein. The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. As such, the memory 282 of the UE may include a non-transitory computer-readable medium storing one or more instructions for wireless communication, wherein the one or more instructions include, when executed by one or more processors of the UE 120 (e.g., the processor 258 and / or the controller / processor 280), causing the one or more processors to perform reference FIG. 4A to FIG. 4C and Figure 5 In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120, the one or more instructions may execute or direct, for example, Figure 5 The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0036] In some aspects, Figure 2 The UE 120 shown in the figure may include a first UE, as further described below. The first UE may include a component for receiving (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.) cross-link interference information identifying the cross-link interference strength at the second UE 120-2 from the second UE; a component for determining (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) an uplink transmit power based at least in part on the cross-link interference strength at the second UE 120-2; a component for transmitting on the uplink using the determined uplink transmit power, etc. (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.); and so on. In some aspects, such components may include a combination of 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, etc. UE 120 may also include a second UE, as described elsewhere herein.

[0037] As mentioned above, Figure 2 are provided as examples. Other examples may be relevant to Figure 2 Different than described.

[0038] Figure 3A and Figure 3B is a schematic diagram illustrating an example 300 / 300 ′ of cross-link interference in a sidelink communication scenario according to various aspects of the present disclosure.

[0039] like Figure 3A As shown, in a first scenario, a first BS 110-1 may provide a first cell including a first UE 120-1-1, and a second BS 110-2 may provide a second cell adjacent to the first cell, the second cell including a second UE 120-2. In some cases, dynamic time division duplexing (TDD) may cause UE-to-UE cross-link interference (CLI). For example, when the first UE 120-1 sends an uplink (UL) transmission on an uplink symbol in the first cell, the uplink transmission may conflict with a downlink (DL) transmission on a downlink symbol in the second cell. In this case, the first UE 120-1 may be referred to as an aggressor UE, which causes cross-link interference, and the second UE 120-2 may be referred to as a victim UE, which experiences cross-link interference. Cross-link interference may be more common at the cell edge between adjacent cells and may cause the signal to interference and noise ratio (SINR) of the victim UE to degrade.

[0040] like Figure 3B As shown, in another scenario, a single BS 110 may provide coverage for both the first UE 120-1 and the second UE 120-2. For example, the BS 110 may provide full-duplex capability, which enables the second UE 120-2 to receive on the downlink while the first UE 120-1 is transmitting on the uplink. In this case, simultaneously scheduling uplink transmissions of the first UE 120-1 in uplink symbols with downlink transmissions to the second UE 120-2 in downlink symbols may cause the second UE 120-2 to experience cross-link interference.

[0041] The first UE 120-1 may be configured with a transmit power control process that enables the UE 120 to adjust the uplink transmit power based at least in part on a physical uplink shared channel (PUSCH) transmit power, a maximum configured output power, a target receive power at the BS 110, and / or other factors. However, cross-link interference measurements may not be included in the transmit power control process. Therefore, some aspects described herein enable the victim UE to provide information identifying the strength of cross-link interference via a sidelink so that the attacker UE can perform improved transmit power control. In this way, the victim UE and the attacker UE are enabled to reduce the possibility of interference, thereby improving network communications.

[0042] As pointed out above, Figure 3A and 3B Other examples may differ from those described with respect to FIGS. 3 and 4 .

[0043] FIG. 4A to FIG. 4C 4 is a schematic diagram illustrating an example 400 / 400' / 400" of uplink power control for cross-link interference in a sidelink communication scenario according to various aspects of the present disclosure. Figure 4A As shown, the example 400 may include a first UE 120-1 (eg, which is an aggressor UE in a cross-link interference scenario) and a second UE 120-2 (eg, which is a victim UE in a cross-link interference scenario).

[0044] like Figure 4A As shown, and in accordance with reference numeral 410, the second UE 120-2 may detect and measure cross-link interference. For example, during a period in which the first UE 120-1 may transmit on the uplink, the second UE 120-2 is simultaneously receiving on the downlink, which may cause the second UE 120-2 to experience cross-link interference. In some aspects, the second UE 120-2 may measure specific characteristics of the network to determine the strength of the cross-link interference. For example, the second UE 120-2 may determine a reference signal received power (RSRP), such as a sounding reference signal (SRS). Additionally or alternatively, the second UE 120-2 may determine a received signal strength indicator (RSSI), among other things. In some aspects, the second UE 120-2 may generate a layer 3 (L3) measurement report for the SRS RSRP and / or RSSI. In some aspects, as Figure 4B As shown, and in example 400', multiple victim UEs may detect and measure cross-link interference. For example, both the second UE 120-2 and the third UE 120-3 may detect and measure cross-link interference.

[0045] like Figure 4AAs further shown, and according to reference numeral 420, the first UE 120-1 may receive cross-link interference information identifying the cross-link interference strength from the second UE 120-2. For example, the second UE 120-2 may send the information identifying the cross-link interference strength via a sidelink connection with the first UE 120-1. Additionally or alternatively, the second UE 120-2 may send the information via one or more BSs 110, which may relay the information to the first UE 120-1. In some aspects, as Figure 4B As shown, the first UE 120-1 may receive multiple reports on cross-link interference strengths. For example, the first UE 120-1 may receive first cross-link interference information identifying a first cross-link interference strength and second cross-link interference information identifying a second cross-link interference strength.

[0046] like Figure 4A As further shown, and in accordance with reference numeral 430, the first UE 120-1 may perform a power control procedure. For example, the first UE 120-1 may determine an uplink transmit power based at least in part on the cross-link interference strength. In some aspects, the first UE 120-1 may reduce the transmit power to cause the cross-link interference to be reduced. For example, the first UE 120-1 may reduce the uplink transmit power based at least in part on the cross-link interference strength to ensure that the cross-link interference strength on subsequent uplink transmissions is less than a threshold. In this case, the first UE 120-1 may change from using a first transmit power control formula, which may take the following form:

[0047]

[0048] Where P PUSCH is the uplink transmit power (e.g., for PUSCH transmission), P CMAX is the maximum output power configured by BS 110 for the cell in which the first UE 120 - 1 is operating, P O_PUSCH is the target received power at BS 110 normalized by the bandwidth of the PUSCH transmission, μ is the subcarrier spacing configuration, M is the bandwidth of the PUSCH transmission in terms of the number of resource blocks, α is the segmented path loss compensation coefficient, PL is the downlink path loss estimate determined by the first UE 120-1, Δ TF is a parameter related to the modulation and coding scheme and code rate of PUSCH transmission, f is a closed-loop power control parameter, and q, j and l are configurable parameters. Further, the first UE 120-1 can be changed to use a second transmit power control formula, which can take the following form:

[0049] P′PUSCH (j, q, l) = P PUSCH (j, q, l)-min{0, τ·(P CLI，ref -P CLI )} (2)

[0050] Where P' PUSCH is the uplink transmit power, P CLI is the cross-link interference strength, P CLI,ref is a reference cross-link interference strength (e.g., used to convert the absolute power of the cross-link interference strength into a decibel (dB) value), and τ is a scaling factor. In this case, the second transmit power control formula results in the determined uplink transmit power being less than or equal to the uplink transmit power determined using the first transmit power control formula. Additionally or alternatively, the first UE 120-1 may adjust one or more parameters (such as the path loss scaling factor (α), the target received power (P ), and the target receive power (P ) based at least in part on the occurrence of cross-link interference. O_PUSCH ) or a modulation and coding scheme parameter (ΔTF) (for example, which can reduce channel throughput by reducing the modulation and coding scheme and / or increasing the code rate)) to reduce the uplink transmit power calculated using the first and / or second power control formulas, thereby reducing the uplink transmit power to reduce cross-link interference.

[0051] In some aspects, the first UE 120-1 may determine a scheduling request indicator (SRI) in conjunction with determining an uplink transmit power. For example, the first UE 120-1 may determine the SRI of the second UE 120-2 so that the first UE 120-1 can identify subsequent uplink transmissions that are to cause subsequent cross-link interference to the second UE 120-2 (and adjust the subsequent uplink transmit power of the subsequent uplink transmissions). In this case, the first UE 120-1 may adjust the uplink transmit power for each uplink transmission that is associated with the same SRI reported by the second UE 120-2 in conjunction with reporting the cross-link interference strength.

[0052] In some aspects, the first UE 120-1 may determine the uplink transmit power based at least in part on receiving information identifying multiple cross-link interference strengths from multiple UEs 120, such as Figure 4BAs shown. For example, the first UE 120-1 may select the strongest cross-link interference strength reported by the UE 120, and may adjust the uplink transmit power based at least in part on the strongest cross-link interference strength. Alternatively, the first UE 120-1 may determine an average cross-link interference strength based at least in part on a plurality of cross-link interference strengths, and may adjust the uplink transmit power based at least in part on the average cross-link interference strength. Additionally or alternatively, the first UE 120-1 may select a subset of the reported cross-link interference strengths, and adjust the uplink transmit power based at least in part on the subset of the reported cross-link interference strengths. For example, the first UE 120-1 may select one or more cross-link interference strengths reported by one or more UEs 120 having the highest priority for scheduling downlink transmissions. In other words, the first UE 120-1 may adjust the uplink transmit power to ensure that another UE 120 that is to receive or has received a high priority downlink transmission (such as a downlink transmission of an ultra-reliable low-latency communication (URLLC) service) does not experience a threshold level of cross-link interference in subsequent symbols.

[0053] In some aspects, first UE 120-1 may determine uplink transmit power control for multiple symbol sets. Figure 4CAs shown, the first symbol set 4 and 5 may have an uplink transmission by the first UE 120-1 and a downlink transmission to the second UE 120-2 resulting in a cross-link interference scenario, symbols 6 and 7 may have an uplink transmission by the first UE 120-1 and a flexible transmission or reception by the second UE 120-2 resulting in a cross-link interference scenario, and symbols 8 and 9 may have an uplink transmission by the first UE 120-1 and an uplink transmission by the second UE 120-2 resulting in a cross-link interference scenario. In this case, the first UE 120-1 may determine to perform separate power control for different subsets of symbols. For example, the first UE 120-1 may perform a first power control process in symbols 4 and 5 to avoid cross-link interference and a second power control process in symbols 6 to 9 (e.g., to achieve a higher uplink transmit power). In some aspects, the first UE 120-1 may perform the same power control process on each symbol subset, which results in a single uplink transmit power being applied on symbols 4 to 9 to avoid cross-link interference. In this case, the first UE 120-1 can maintain phase continuity for symbols 4 to 9 by using a single power control process. In some aspects, the first UE 120-1 can apply a transmit power control process to multiple cross-link interference strengths across multiple symbol sets. For example, the first UE 120-1 can select the strongest cross-link interference strength for the symbol set and adjust the uplink transmit power of the multiple symbol sets based at least in part on the strongest cross-link interference strength. Additionally or alternatively, to determine the uplink transmit power, the first UE 120-1 can select an average cross-link interference strength across multiple symbol sets, or select one or more cross-link interference strengths associated with, for example, a high priority type of transmission.

[0054] References FIG. 4A to FIG. 4C , and the first UE 120-1 may transmit using the new uplink transmit power as indicated by reference numeral 440. For example, based at least in part on determining the uplink transmit power to avoid cross-link interference, the first UE 120-1 may transmit using the uplink transmit power on the uplink. In this manner, the first UE 120-1 and the second UE 120-2 may reduce cross-link interference, thereby improving network communications.

[0055] As pointed out above, FIG. 4A to FIG. 4C are provided as examples. Other examples can be found in the FIG. 4A to FIG. 4C Different than described.

[0056] Figure 5is a diagram illustrating an example process 500 performed, for example, by a first UE in accordance with various aspects of the present disclosure. The example process 500 is an example in which a first UE (eg, UE 120, etc.) performs operations associated with uplink power control for a cross-link interference scenario.

[0057] like Figure 5 As shown, in some aspects, process 500 may include receiving, from a second UE, cross-link interference information identifying a cross-link interference strength at the second UE (block 510). For example, a first UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.) may receive, from a second UE, cross-link interference information identifying a cross-link interference strength at the second UE, as described above with reference to 4A to 4C.

[0058] like Figure 5 As further shown, in some aspects, process 500 may include determining an uplink transmit power based at least in part on a cross-link interference strength at the second UE (block 520). For example, the first UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may determine an uplink transmit power based at least in part on a cross-link interference strength at the second UE, as described above with reference to FIG. 4A to FIG. 4C As described.

[0059] like Figure 5 As further shown, in some aspects, process 500 may include transmitting on the uplink using the determined uplink transmit power (block 530). For example, on the uplink, the first UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may transmit using the determined uplink transmit power, as described above with reference to FIG. 4A to FIG. 4C As described.

[0060] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0061] In a first aspect, receiving the cross-link interference information includes receiving the cross-link interference information directly from the second UE.

[0062] In a second aspect, alone or in combination with the first aspect, receiving the cross-link interference information includes receiving the cross-link interference information via a base station.

[0063] In a third aspect, alone or in combination with one or more of the first and second aspects, determining the uplink transmit power comprises determining the uplink transmit power for one or more symbols during which the first UE is to transmit on the uplink and the second UE is to receive on the downlink.

[0064] In a fourth aspect, alone or in combination with one or more of the first to third aspects, determining the uplink transmit power comprises determining the uplink transmit power based at least in part on a power control function, a cross-link interference strength, a reference cross-link interference strength, and a scaling factor.

[0065] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, determining the uplink transmit power includes determining the uplink transmit power based at least in part on a transmission parameter, wherein the transmission parameter is selected at least in part based on a cross-link interference strength, and the transmission parameter is at least one of the following: a path loss scaling factor parameter, a channel throughput parameter, or a target receive power parameter.

[0066] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, determining the uplink transmit power includes determining a scheduling request indicator for an uplink beam, the uplink beam causing cross-link interference at a second UE, and determining the uplink transmit power of the uplink beam based at least in part on determining the scheduling request indicator for the uplink beam.

[0067] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, determining the uplink transmit power includes receiving one or more other cross-link interference reports at one or more third UEs, and determining the uplink transmit power based at least in part on the strongest cross-link interference strength reported by the second UE and one or more third UEs.

[0068] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, determining the uplink transmit power includes receiving one or more other cross-link interference reports at one or more third UEs, and determining the uplink transmit power based at least in part on the average cross-link interference strength reported by the second UE and one or more third UEs.

[0069] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, determining the uplink transmit power includes receiving one or more other cross-link interference reports at one or more third UEs, and determining the uplink transmit power based at least in part on at least one cross-link interference strength reported by the second UE and one or more third UEs and at least in part on the relative priorities of the second UE and the one or more third UEs.

[0070] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, determining the uplink transmit power includes identifying a subset of symbols that generates cross-link interference for a second UE, and determining an uplink transmit power for the subset of symbols.

[0071] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, determining the uplink transmit power includes determining the uplink transmit power for a symbol set that includes a subset of symbols that generates cross-link interference for a second UE and includes one or more other symbols.

[0072] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, determining the uplink transmit power includes identifying multiple symbol subsets associated with different cross-link interferences at a second UE, and determining the uplink transmit power based at least in part on a highest cross-link strength in a symbol subset among the multiple symbol subsets.

[0073] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, determining the uplink transmit power includes identifying multiple symbol subsets associated with different cross-link interferences at a second UE, and determining the uplink transmit power based at least in part on an average cross-link strength over the multiple symbol subsets.

[0074] In a fourteenth aspect, alone or in combination with one or more of aspects one to thirteen, determining the uplink transmit power includes identifying multiple symbol subsets associated with different cross-link interferences at a second UE, and determining the uplink transmit power based at least in part on a specific cross-link strength in a symbol subset of the multiple symbol subsets associated with a specific type of uplink transmission.

[0075] although Figure 5 An example block diagram of process 500 is shown, but in some aspects process 500 may include additional blocks, fewer blocks, different blocks, or different Figure 5 The blocks shown are arranged differently. Additionally, or alternatively, two or more blocks of process 500 can be executed in parallel.

[0076] The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise form disclosed, and modifications and variations are possible in light of the above disclosure or may be acquired from practice of these aspects.

[0077] 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.

[0078] As used herein, satisfying a threshold may refer to a value 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.

[0079] It is apparent that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit these aspects. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to specific software code. It should be understood that software and hardware can be designed to implement the systems and / or methods based at least in part on the description herein.

[0080] Although the specific combination of features is enumerated in the claims and / or the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or undisclosed in the specification. Although each dependent claim listed below may only directly quote a claim, the disclosure of various aspects includes the combination of each dependent claim and each other claim in the claims. The phrase pointing to "at least one" in a series of projects refers to any combination (including single members) of those projects. As an example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, and any combination with the multiple of the same element (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other order of a, b and c).

[0081] Unless explicitly stated, any element, behavior or instruction used in this article should not be interpreted as critical or essential. In addition, as used herein, the terms "a" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.), and can be used interchangeably with "one or more". If only one item is intended to be used, the phrase "only one" or similar language is used. In addition, as used herein, the terms "have", "have", "have ..." and the like are intended to be open terms. In addition, unless otherwise explicitly stated, the phrase "based on" means "based at least in part on".

Claims

1. A method for wireless communication performed by a first user equipment UE, comprising: receiving, from a second UE, cross-link interference information identifying a cross-link interference strength at the second UE; determining an uplink transmit power based at least in part on a power control function, the cross-link interference strength at the second UE, a reference cross-link interference strength determined based on an absolute power of the cross-link interference strength, and a scaling factor; as well as Transmission is performed on the uplink using the determined uplink transmission power.

2. The method of claim 1, wherein: Receiving the cross-link interference information includes: The cross-link interference information is received directly from the second UE.

3. The method of claim 1, wherein: Receiving the cross-link interference information includes: The cross-link interference information is received via a base station.

4. The method of claim 1, wherein: Determining the uplink transmit power includes: The uplink transmit power is determined for one or more symbols during which the first UE is to transmit on the uplink and the second UE is to receive on the downlink.

5. The method of claim 1, wherein: Determining the uplink transmit power includes: determining the uplink transmit power based at least in part on a transmission parameter selected based at least in part on the cross-link interference strength, and The transmission parameter is at least one of the following: Path loss scaling factor parameter, channel throughput parameters, or Target receive power parameter.

6. The method of claim 1, wherein: Determining the uplink transmit power includes: determining a scheduling request indicator for an uplink beam causing cross-link interference at the second UE; and The uplink transmit power of the uplink beam is determined based at least in part on determining the scheduling request indicator for the uplink beam.

7. The method of claim 1, further comprising: receiving one or more other cross-link interference reports at one or more third UEs; as well as Wherein, determining the uplink transmit power includes: The uplink transmit power is determined based at least in part on the strongest cross-link interference strength reported by the second UE and the one or more third UEs.

8. The method of claim 1, further comprising: receiving one or more other cross-link interference reports at one or more third UEs; as well as Wherein, determining the uplink transmit power includes: The uplink transmit power is determined based at least in part on an average cross-link interference strength reported by the second UE and the one or more third UEs.

9. The method of claim 1, further comprising: receiving one or more other cross-link interference reports at one or more third UEs; as well as Wherein, determining the uplink transmit power includes: The uplink transmit power is determined based at least in part on at least one cross-link interference strength reported by the second UE and the one or more third UEs and based at least in part on a relative priority of the second UE and the one or more third UEs.

10. The method of claim 1, wherein: Determining the uplink transmit power includes: identifying a subset of symbols for which cross-link interference is generated for the second UE; and The uplink transmit power for the subset of symbols is determined.

11. The method of claim 1, wherein: Determining the uplink transmit power includes: The uplink transmit power is determined for a symbol set, the symbol set comprising a subset of symbols for which cross-link interference is generated for the second UE, and the symbol set comprising one or more other symbols.

12. The method of claim 1, wherein: Determining the uplink transmit power includes: identifying a plurality of symbol subsets associated with different cross-link interferences at the second UE; and The uplink transmit power is determined based at least in part on a highest cross-link strength in a symbol subset of the plurality of symbol subsets.

13. The method of claim 1, wherein: Determining the uplink transmit power includes: identifying a plurality of symbol subsets associated with different cross-link interferences at the second UE; and The uplink transmit power is determined based at least in part on an average cross-link strength across the plurality of symbol subsets.

14. The method of claim 1, wherein: Determining the uplink transmit power includes: identifying a plurality of symbol subsets associated with different cross-link interferences at the second UE; and The uplink transmit power is determined based at least in part on a particular cross-link strength in a subset of symbols in the plurality of subsets of symbols that is associated with a particular type of uplink transmission.

15. A first user equipment UE for wireless communication, comprising: Memory; as well as one or more processors, the one or more processors operably coupled to the memory, the memory and the one or more processors configured to: receiving, from a second UE, cross-link interference information identifying a cross-link interference strength at the second UE; determining an uplink transmit power based at least in part on a power control function, the cross-link interference strength at the second UE, a reference cross-link interference strength determined based on an absolute power of the cross-link interference strength, and a scaling factor; as well as Transmission is performed on the uplink using the determined uplink transmission power.

16. The first UE according to claim 15, wherein: When receiving the cross-link interference information, the memory and the one or more processors are configured to: The cross-link interference information is received directly from the second UE.

17. The first UE according to claim 15, wherein: When receiving the cross-link interference information, the memory and the one or more processors are configured to: The cross-link interference information is received via a base station.

18. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: The uplink transmit power is determined for one or more symbols during which the first UE is to transmit on the uplink and the second UE is to receive on the downlink.

19. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: determining the uplink transmit power based at least in part on a transmission parameter selected based at least in part on the cross-link interference strength, and The transmission parameter is at least one of the following: Path loss scaling factor parameter, channel throughput parameters, or Target receive power parameter.

20. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: determining a scheduling request indicator for an uplink beam causing cross-link interference at the second UE; as well as The uplink transmit power of the uplink beam is determined based at least in part on determining the scheduling request indicator for the uplink beam.

21. The first UE of claim 15, wherein the memory and the one or more processors are further configured to: receiving one or more other cross-link interference reports at one or more third UEs; and in, Determining the uplink transmit power includes: The uplink transmit power is determined based at least in part on the strongest cross-link interference strength reported by the second UE and the one or more third UEs.

22. The first UE of claim 15, wherein the memory and the one or more processors are further configured to: receiving one or more other cross-link interference reports at one or more third UEs; and in, Determining the uplink transmit power includes: The uplink transmit power is determined based at least in part on an average cross-link interference strength reported by the second UE and the one or more third UEs.

23. The first UE of claim 15, wherein the memory and the one or more processors are further configured to: receiving one or more other cross-link interference reports at one or more third UEs; and in, Determining the uplink transmit power includes: The uplink transmit power is determined based at least in part on at least one cross-link interference strength reported by the second UE and the one or more third UEs and based at least in part on a relative priority of the second UE and the one or more third UEs.

24. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: identifying a subset of symbols for which cross-link interference is generated for the second UE; and The uplink transmit power for the subset of symbols is determined.

25. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: The uplink transmit power is determined for a symbol set, the symbol set comprising a subset of symbols for which cross-link interference is generated for the second UE, and the symbol set comprising one or more other symbols.

26. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: identifying a plurality of subsets of symbols associated with different cross-link interferences at the second UE; as well as The uplink transmit power is determined based at least in part on a highest cross-link strength in a symbol subset of the plurality of symbol subsets.

27. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: identifying a plurality of subsets of symbols associated with different cross-link interferences at the second UE; as well as The uplink transmit power is determined based at least in part on an average cross-link strength across the plurality of symbol subsets.

28. The first UE according to claim 15, wherein: When determining the uplink transmit power, the memory and the one or more processors are configured to: identifying a plurality of subsets of symbols associated with different cross-link interferences at the second UE; as well as The uplink transmit power is determined based at least in part on a particular cross-link strength in a subset of symbols in the plurality of subsets of symbols that is associated with a particular type of uplink transmission.

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, which, when executed by one or more processors of a first user equipment UE, cause the one or more processors to: receiving, from a second UE, cross-link interference information identifying a cross-link interference strength at the second UE; determining an uplink transmit power based at least in part on a power control function, the cross-link interference strength at the second UE, a reference cross-link interference strength determined based on an absolute power of the cross-link interference strength, and a scaling factor; as well as Transmission is performed on the uplink using the determined uplink transmission power.

30. An apparatus for wireless communication, comprising: means for receiving, from a second UE, cross-link interference information identifying a cross-link interference strength at the second UE; means for determining an uplink transmit power based at least in part on a power control function, the cross-link interference strength at the second UE, a reference cross-link interference strength determined based on an absolute power of the cross-link interference strength, and a scaling factor; as well as Means for transmitting on the uplink using the determined uplink transmit power.

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