Patent ID: 12192965

DETAILED DESCRIPTION

A wireless communications system may include communication devices, such as a user equipment (UE) or a base station, that may support multiple radio access technologies. Examples of radio access technologies include 4G systems, such as LTE systems, and 5G systems, which may be referred to as NR systems. The communication devices may support wireless communication while operating in a half-duplex mode or a full-duplex mode. For example, a communication device (e.g., one or more components of a base station or a UE) may support wireless communications while operating in a full-duplex mode in which the communication device may simultaneously transmit and receive wireless communications using the same time resources (e.g., symbol, slot, or subframe) and the same frequency resources (e.g., frequency subband). That is, the communication device (such as a base station) may receive uplink communications and transmit downlink communications at a same time while operating in the full-duplex mode. In some examples, full-duplex communications may provide latency reduction, increase of spectrum efficiency (e.g., on a per-cell or per-UE or per-base station basis), more efficient resource utilization, and coverage enhancement among other examples.

Additionally or alternatively, the communication device may support wireless communications while operating in a half-duplex mode in which the communication device may transmit or receive wireless communications at a time. That is, the communication device (such as a base station) may receive uplink communications or transmit downlink communications at a time while operating in the half-duplex mode. Such situations may create interference with other communication devices. In some examples, a second base station may be susceptible to interference (also referred to as crosslink interference (CLI)) caused by communications at a first base station. For example, the first base station may communicate (e.g., transmit or receive wireless communications) at a same time that the second base station is transmitting or receiving wireless communication due to full-duplex operations or misaligned communication schedules and may cause interference at the second base station.

For example, a base station may receive signaling during communications with a first UE (or for example, any other wireless device) at the same time as a neighboring base station is transmitting to a second UE. In such examples, a receive panel of the base station may be enabled and the base station may experience noise (e.g., may unintentionally receive transmissions energy) from the neighboring base station transmissions. The base station and the neighboring base station may be respectively receiving/transmitting at a same time due to full-duplex operations or functions at the base station and the neighboring base station or due to misaligned transmission schedules in half duplex operations which may cause interference at the base station. In some examples, the interference caused by the neighboring base station communicating on an opposite communication link (e.g., downlink at the base station during uplink at the neighboring UE or vice versa) during a same time period may cause CLI. In some examples, the base station experiencing cross-link interference may be referred to as a victim base station and the base station causing the cross-link interference may be referred to as an aggressor base station.

The victim base station and the aggressor base station may coordinate to measure CLI and mitigate the associated affects using OTA channels (e.g., physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), physical random access channel (PRACH)) as a reference signal for inter-base station CLI measurements and mitigation. For example, OTA signaling may be performed between base stations via Xn signaling.

For example, a receiving base station (e.g., a victim base station that is susceptible to interference from other base stations, or an aggressor base station that creates interference for other base stations) may receive a broadcast communication, from a transmitting base station, indicating a downlink control channel (e.g., physical downlink control channel (PDCCH) repetition pattern where each repetition may be used as a reference signal for measuring CLI by the receiving base station. The transmitting base station may transmit a number of PDCCH repetitions using a number of transmit beams and the receiving base station may monitor for the repetitions using a number of receive beams according to the repetition pattern.

The receiving entity may measure an interference level for each transmit/receive combination and may select a beam for communicating over an overlapping set of communication resources (e.g., overlapping time, or frequency resources, or both). Based on the measured interference level for each beam combination, the receiving base station may select a communication beam to communicate with a user equipment (UE). The selected communication beam may be, for example, associated with a lowest measured CLI level, a CLI level lower than a threshold or both. Additionally or alternatively, the receiving base station may configure the UE to transmit using a higher power (e.g., when the receiving base station is a victim base station) or may transmit to the UE using a lower power (e.g., when the receiving base station is an aggressor base station) according to the measured interference level for the selected communication beam.

As such the receiving base station (e.g., victim base station or aggressor base station) may mitigate interference caused by overlapping full-duplex communications or misaligned communication schedules at a victim base station.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are then described in the context of a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to OTA signaling for inter-base station CLI measurements.

FIG.1illustrates an example of a wireless communications system100that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The wireless communications system100may include one or more network entities (such as one or more components of one or more base stations105), one or more UEs115, and a core network130. In some examples, the wireless communications system100may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system100may support enhanced broadband communications, ultra-reliable communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

The base stations105may be dispersed throughout a geographic area to form the wireless communications system100and may be devices in different forms or having different capabilities. The base stations105and the UEs115may wirelessly communicate via one or more communication links125. Each base station105may provide a coverage area110over which the UEs115and the base station105may establish one or more communication links125. The coverage area110may be an example of a geographic area over which a base station105and a UE115may support the communication of signals according to one or more radio access technologies.

The UEs115may be dispersed throughout a coverage area110of the wireless communications system100, and each UE115may be stationary, or mobile, or both at different times. The UEs115may be devices in different forms or having different capabilities. Some example UEs115are illustrated inFIG.1. The UEs115described herein may be able to communicate with various types of devices, such as other UEs115, the base stations105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown inFIG.1.

In some examples, one or more components of the wireless communications system100may operate as or be referred to as a network node or network entity. As used herein, a network node or network entity may refer to any UE115, base station105, entity of a core network130, apparatus, device, or computing system configured to perform any techniques described herein. For example, a network node may be a UE115. As another example, a network node may be a base station105. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE115, the second network node may be a base station105, and the third network node may be a UE115. In another aspect of this example, the first network node may be a UE115, the second network node may be a base station105, and the third network node may be a base station105. In yet other aspects of this example, the first, second, and third network nodes may be different. Similarly, reference to a UE115, a base station105, an apparatus, a device, or a computing system may include disclosure of the UE115, base station105, apparatus, device, or computing system being a network node. For example, disclosure that a UE115is configured to receive information from a base station105also discloses that a first network node is configured to receive information from a second network node. In this example, consistent with this disclosure, the first network node may refer to a first UE115, a first base station105, a first apparatus, a first device, or a first computing system configured to receive the information; and the second network node may refer to a second UE115, a second base station105, a second apparatus, a second device, or a second computing system.

The base stations105may communicate with the core network130, or with one another, or both. For example, the base stations105may interface with the core network130through one or more backhaul links120(e.g., via an S1, N2, N3, or other interface). The base stations105may communicate with one another over the backhaul links120(e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations105), or indirectly (e.g., via core network130), or both. In some examples, the backhaul links120may be or include one or more wireless links.

One or more of the base stations105described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

A UE115may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE115may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a multimedia/entertainment device (e.g., a radio, a MP3 player, or a video device), a camera, a gaming device, a navigation/positioning device (e.g., GNSS (global navigation satellite system) devices based on, for example, GPS (global positioning system), Beidou, GLONASS, or Galileo, or a terrestrial-based device), a tablet computer, a laptop computer, a netbook, a smartbook, a personal computer, a smart device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, virtual reality goggles, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet)), a drone, a robot/robotic device, a vehicle, a vehicular device, a meter (e.g., parking meter, electric meter, gas meter, water meter), a monitor, a gas pump, an appliance (e.g., kitchen appliance, washing machine, dryer), a location tag, a medical/healthcare device, an implant, a sensor/actuator, a display, or any other suitable device configured to communicate via a wireless or wired medium. In some examples, a UE115may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.

The UEs115described herein may be able to communicate with various types of devices, such as other UEs115that may sometimes act as relays as well as the base stations105and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown inFIG.1.

The UEs115and the base stations105may wirelessly communicate with one another via one or more communication links125over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links125. For example, a carrier used for a communication link125may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system100may support communication with a UE115using carrier aggregation or multi-carrier operation. A UE115may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be positioned according to a channel raster for discovery by the UEs115. A carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs115via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology).

The communication links125shown in the wireless communications system100may include uplink transmissions from a UE115to a base station105, or downlink transmissions from a base station105to a UE115. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode).

A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system100. For example, the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communications system100(e.g., the base stations105, the UEs115, or both) may have hardware configurations that support communications over a particular carrier bandwidth or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system100may include base stations105or UEs115that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE115may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements that a UE115receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE115. A wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE115.

The time intervals for the base stations105or the UEs115may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1/(Δfmax·Nf) seconds, where Δfmaxmay represent the maximum supported subcarrier spacing, and Nfmay represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from0to1023).

Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems100, a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system100and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system100may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs115. For example, one or more of the UEs115may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs115and UE-specific search space sets for sending control information to a specific UE115.

Each base station105may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a base station105(e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area110or a portion of a geographic coverage area110(e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station105. For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas110, among other examples.

A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs115with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered base station105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs115with service subscriptions with the network provider or may provide restricted access to the UEs115having an association with the small cell (e.g., the UEs115in a closed subscriber group (CSG), the UEs115associated with users in a home or office). A base station105may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.

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

In some examples, a base station105may be movable and therefore provide communication coverage for a moving geographic coverage area110. In some examples, different geographic coverage areas110associated with different technologies may overlap, but the different geographic coverage areas110may be supported by the same base station105. In other examples, the overlapping geographic coverage areas110associated with different technologies may be supported by different base stations105. The wireless communications system100may include, for example, a heterogeneous network in which different types of the base stations105provide coverage for various geographic coverage areas110using the same or different radio access technologies.

The wireless communications system100may support synchronous or asynchronous operation. For synchronous operation, the base stations105may have similar frame timings, and transmissions from different base stations105may be approximately aligned in time. For asynchronous operation, the base stations105may have different frame timings, and transmissions from different base stations105may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.

Some UEs115may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously). In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for the UEs115include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs115may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guard-band of a carrier, or outside of a carrier.

The wireless communications system100may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system100may be configured to support ultra-reliable low-latency communications (URLLC). The UEs115may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.

In some examples, a UE115may also be able to communicate directly with other UEs115over a device-to-device (D2D) communication link135(e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs115utilizing D2D communications may be within the geographic coverage area110of a base station105. Other UEs115in such a group may be outside the geographic coverage area110of a base station105or be otherwise unable to receive transmissions from a base station105. In some examples, groups of the UEs115communicating via D2D communications may utilize a one-to-many (1:M) system in which each UE115transmits to every other UE115in the group. In some examples, a base station105facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs115without the involvement of a base station105.

The core network130may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network130may be an evolved packet core (EPC) or 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs115served by the base stations105associated with the core network130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services150for one or more network operators. The IP services150may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.

Some of the network devices, such as a base station105, may include subcomponents such as an access network entity140, which may be an example of an access node controller (ANC). Each access network entity140may communicate with the UEs115through one or more other access network transmission entities145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs). Each access network transmission entity145may include one or more antenna panels. In some configurations, various functions of each access network entity140or base station105may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station105).

As described herein, a base station105may include one or more components, such as network nodes or network entities, that are located at a single physical location or one or more components located at various physical locations. In examples in which the base station105includes components that are located at various physical locations, the various components may each perform various functions such that, collectively, the various components achieve functionality that is similar to a base station105that is located at a single physical location. As such, a base station105described herein may equivalently refer to a standalone base station105(also known as a monolithic base station) or a base station105including components that are located at various physical locations or virtualized locations (also known as a disaggregated base station). In some implementations, such a base station105including components that are located at various physical locations may be referred to as or may be associated with a disaggregated radio access network (RAN) architecture, such as an Open RAN (O-RAN) or Virtualized RAN (VRAN) architecture. In some implementations, such components of a base station105may include or refer to one or more of a central unit (or centralized unit CU), a distributed unit (DU), or a radio unit (RU).

The wireless communications system100may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. The UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs115located indoors. The transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

The wireless communications system100may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system100may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as the base stations105and the UEs115may employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

A base station105or a UE115may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station105or a UE115may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a base station105may be located in diverse geographic locations. A base station105may have an antenna array with a number of rows and columns of antenna ports that the base station105may use to support beamforming of communications with a UE115. Likewise, a UE115may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.

The base stations105or the UEs115may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station105, a UE115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation).

A base station105or a UE115may use beam sweeping techniques as part of beam forming operations. For example, a base station105may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station105multiple times in different directions. For example, the base station105may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station105, or by a receiving device, such as a UE115) a beam direction for later transmission or reception by the base station105.

Some signals, such as data signals associated with a particular receiving device, may be transmitted by a base station105in a single beam direction (e.g., a direction associated with the receiving device, such as a UE115). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions. For example, a UE115may receive one or more of the signals transmitted by the base station105in different directions and may report to the base station105an indication of the signal that the UE115received with a highest signal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station105or a UE115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station105to a UE115). The UE115may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands. The base station105may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded. The UE115may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted in one or more directions by a base station105, a UE115may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE115) may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

The wireless communications system100may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE115and a base station105or a core network130supporting radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels.

A base station105and a UE115may support wireless communication while operating in a half-duplex mode or a full-duplex mode. In some cases, the base station105and the UE115may support wireless communication, while operating in the half-duplex mode or the full-duplex mode, in various radio frequency spectrum ranges, such as a frequency range 2 (FR2). When operating in the half-duplex mode, the base station105and the UE115may separately (e.g., at different times) transmit wireless communication (e.g., uplink signals, downlink signals) or receive wireless communication (e.g., uplink signals, downlink signals). Alternatively, when operating in the full-duplex mode, the base station105and the UE115may simultaneously (e.g., at the same time) transmit wireless communication (e.g., uplink signals, downlink signals) and receive wireless communication (e.g., uplink signals, downlink signals).

The base station105may support communication of uplink signals using one panel (e.g., an antenna panel, an antenna port) and another panel for communication of downlink signals. For example, the base station105may receive uplink signals using one panel and transmit downlink signals using another panel. In some cases, the wireless communications while operating in the full-duplex mode may depend on a capability of the base station105. Additionally or alternatively, to support full-duplex operations by the base station105, the capability of the base station105may be based on a beam separation between beams for uplink signals and beams for downlink signals. In some other cases, to support full-duplex operations, by the base station105, the capability of the base station105may be based on self-interference between uplink signals and downlink signals at the base station105. In other cases, to support full-duplex operation by the base station105, the capability of the base station105may be based on a clutter echo between uplink signals and downlink signals.

In some cases, scheduled communications between the base station105and a UE115may overlap in a time domain or a frequency domain, or both with scheduled communications between a neighboring base station105and another UE115. As described herein, an overlap may between an uplink communications and downlink communications and may refer to a partial overlap or a full overlap in a time domain or a frequency domain, or both and may be caused by full-duplex operations at the base station105or due to a misaligned communications schedule for half-duplex operations between the base station105and the neighboring base station105, for example, that causes the base station105to receive at a same time the neighboring base station transmits, or vice versa.

In some cases, due to the overlap, the base station105may be susceptible to interference (also referred to as CLI) from the other base station105. In some examples, to reduce or eliminate interference (e.g., a CLI), the base station105may perform CLI measurement and beam selection based on receiving one or more reference signals from the neighboring base station105.

For example, a base station105may receive, from a neighboring base station105, a broadcast transmission indicating a downlink control channel transmission pattern associated with the neighboring base station105. For examples, the pattern may indicate a set of communication resources on which the neighboring base station105may transmit a number of PDCCH repetitions. The base station105may monitor a plurality of receive beams for a plurality of downlink control channel transmissions from the neighboring base station105according to the downlink control channel transmission pattern. The base station105may select a communication beam according to one or more CLI measurements associated with one or more of the plurality of receive beams based on the monitoring, and may communicate with a UE115using the selected communication beam via a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the neighboring base station105.

In some examples, the first base station105may be experiencing CLI and the neighboring base station105may be causing CLI, or vice versa. By enabling the base station105(e.g., either of the victim or aggressor base station) to support measuring CLI results, the base station105may mitigate effects caused by CLI, among other examples, when performing communications in a full-duplex communications mode or according to a misaligned communications schedule with a UE115.

FIG.2illustrates an example of a wireless communications system200that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The wireless communications system200may implement aspects of the wireless communications system100or may be implemented by aspects of the wireless communications systems100as described with reference toFIG.1. For example, the wireless communications system200may include a base station105-a, a base station105-b, a UE115-a, and a UE115-b, which may be examples of corresponding devices as described with reference toFIG.1. One or more components of base station105-aor base station105-bmay be considered a network entity, and in some examples base station105-aand/or base station105-bmay have a disaggregated architecture, such as an O-RAN or VRAN architecture. In the example ofFIG.2, the base station105-amay support wireless communications with the UE115-aand the UE115-bwhile operating in a full-duplex mode or a half-duplex mode in which the base station105-aand the base station105-bcommunicate according to a misaligned communication schedule (e.g., a schedule in which one base station transmits while another receives).

In the example ofFIG.2, base station105-amay be enabled to perform full-duplex communications as described herein or may communicate according to a communication schedule that is oppositely aligned with a communication schedule of the base station105-b. That is, the base station105-amay receive uplink communications210from the UE115-aover a same set of time resources, or frequency resources, or both, as base station105-btransmits downlink communications220(e.g., PDSCH) to the UE115-b. Thus, the base station105-amay experience CLI230caused by the downlink transmissions performed by the base station105-bwhile monitoring for uplink communications210from the UE115-a. Thus the base station105-amay be a victim base station and the base station105-bmay be an aggressor base station. As such, methods for CLI mitigation may be performed by the base station105-aor the base station105-b.

In a first example, the victim base station105-amay transmit a plurality of PDCCH transmissions for CLI mitigation performed by the neighboring aggressor base station105-b. For example, the base station105-amay broadcast a PDCCH transmission pattern, and time or frequency resources, or both to the base station105-b. The base station105-bmay monitor and measure the received PDCCH transmission, where the PDCCH may serve as an inter-base station CLI measurement signal (e.g., reference signal) for the base station105-b(e.g., or additionally, one or more other neighboring aggressor base stations105) to measure a corresponding interference level.

The base station105-amay transmit the PDCCH transmissions or repetitions according to the broadcasted pattern, to the base station105-b. The base station105-bmay monitor and measure each received PDCCH transmission, where: 1) each PDCCH transmission serves as an inter-base station CLI measurement signal (e.g., reference signal) for the base station105-bto measure a CLI level and 2) the PDCCH transmissions schedule PUSCH transmissions for the base station105-aduring a set of symbols allocated for uplink transmissions at the base station105-a(e.g., during U symbols), which may overlap (e.g., partially or fully) in time with one or more scheduled downlink communications at the base station105-b. The base station105-amay use a number of uplink beams to transmit a number of PDCCH repetitions, such that the base station105-bmay sweep a number of downlink beams to measure a per-downlink beam CLI reference signal received power (RSRP) for each uplink/downlink beam pair (e.g., corresponding to the base station105-aand the base station105-brespectively.

The base station105-bmay decode and measure the PDCCH transmissions to determine a corresponding CLI interference level for each uplink/downlink beam pair. For example, the base station105-bmay measure multiple downlink receive beams to receive the PDCCH repetitions.

Based on measurement results per downlink beam, the base station105-bmay choose or select a downlink beam to use for communications during the U symbols allocated to uplink communications (e.g., PUSCH scheduled by the PDCCH repetitions) at the base station105-a.

In some examples, the base station105-bmay select the downlink beam having or associated with the lowest CLI interference level. In some examples, the base station105-bmay select the downlink beam associated with or having a CLI level that is less than a threshold (e.g., a predetermined threshold, a dynamically configured threshold, or a dynamically indicated threshold). In some examples, the base station105-bmay select the downlink beam having or associated with a CLI level that is relatively high (e.g., higher than a threshold or higher than a CLI level associated with another downlink beam) but may apply a power backoff when transmitting with the downlink beam having or associated with the relatively high CLI level. The base station105-bmay select the downlink beam having or associated with the relatively high CLI level for a number of reasons including channel conditions, availability of other downlink beams, reliability, or quality of service, among other examples.

In some examples, to ensure that the interference measurement performed using the PDCCH transmission may be applied or effective with the later-scheduled PUSCH transmissions for interference mitigation, the base station105-amay transmit the PDCCH and may receive the scheduled PUSCH using a same common downlink/uplink beam or using uplink/downlink beams sharing a same quasi-colocation root reference signal (e.g., transmitting PDCCH may use a relatively wider beam, and receiving PUSCH may use a relatively narrower beam). Therefore, the PDCCH transmissions may be used for measurements by the base station105-bto determine a path loss and hence the CLI level (path loss=reference signal transmit power-RSRP) for communications at the base station105-bduring the scheduled PUSCH on the U symbols allocated to the base station105-a.

Thus, inter-base station CLI experienced by the base station105-amay be mitigated by using OTA channels' measurements to select a downlink beam for overlapping communications at the base station105-b.

In a second example, the aggressor base station105-bmay transmit a plurality of PDCCH transmissions for CLI mitigation performed by the victim base station105-a. For example, the base station105-bmay broadcast a PDCCH transmission pattern and time or frequency resources, or both to the base station105-a. The base station105-amay monitor and measure the received PDCCH transmissions, where the PDCCH may serve as an inter-base station CLI measurement signal (e.g., reference signal) for the base station105-ato measure a corresponding interference level. In some examples, this may use the assumption that the channel between base station105-band the base station105-ais reciprocal.

The base station105-bmat transmit the PDCCH transmission or repetitions according to the broadcasted pattern, to the base station105-a. The base station105-amay monitor and measure each received PDCCH transmission, where: 1) each PDCCH transmission serves as an inter-base station CLI measurement signal (e.g., reference signal) for the base station105-ato measure a CLI level and 2) the PDCCH transmissions schedule PDSCH transmissions for the base station105-bduring a set of symbols allocated for downlink transmissions by the base station105-b(e.g., during D symbols), which may overlap (e.g., partially or fully) in time with one or more scheduled uplink communications at the base station105-a. The base station105-bmay use a number of downlink beams to transmit a number of PDCCH repetitions, such that the base station105-amay sweep a number of uplink beams to measure a per-uplink beam CLI RSRP for each downlink/uplink beam pair (e.g., corresponding to the base station105-band the base station105-arespectively.

The base station105-amay decode and measure the PDCCH transmissions to determine a corresponding CLI interference level for each downlink/uplink beam pair. For example, the base station105-amay measure multiple uplink receive beams to receive the PDCCH repetitions.

Based on measurement results per uplink beam, the base station105-amay choose or select an uplink beam to use for communications during the D symbols allocated to downlink communications (e.g., PDSCH scheduled by the PDCCH repetitions) at the base station105-b.

In some examples, the base station105-amay select the uplink beam having or associated with the lowest CLI interference level. In some examples, the base station105-amay select the uplink beam associated with or having a CLI level that is less than a threshold (e.g., a predetermined threshold, a dynamically configured threshold, or a dynamically indicated threshold). In some examples, the base station105-amay select the uplink beam having or associated with a CLI level that is relatively high (e.g., higher than a threshold or higher than a CLI level associated with another uplink beam) but may indicate to the UE115-ato transmit uplink communications using a higher transmit power for the selected beam communication. For example, the base station105-amay select the uplink beam having or associated with the relatively high CLI level for a number of reasons including channel conditions, availability of other downlink beams, reliability, or quality of service, among other examples and may transmit a configuration to the UE115-athat indicated the UE115-ais to transmit uplink communications for the selected uplink beam using a higher transmit power.

In some examples, to ensure that the interference measurement performed using the PDCCH transmission may be applied or effective with the later-scheduled PDSCH transmissions for interference mitigation, the base station105-bmay transmit the PDCCH and may transmit the scheduled PDSCH using a same common multi-downlink channel beam or using downlink beams sharing a same quasi-colocation root reference signal (e.g., transmitting PDCCH may use a relatively wider beam, and transmitting PDSCH may use a relatively narrower beam). Therefore, the PDCCH transmissions may be used for measurements by the base station105-ato determine a path loss and hence the CLI level (path loss=reference signal transmit power-RSRP) for communications at the base station105-aduring the scheduled PDSCH on the D symbols allocated to the base station105-b.

Thus, inter-base station CLI experienced by the base station105-amay be mitigated by using OTA channels' measurements to select an uplink beam for overlapping communications with the base station105-b.

FIGS.3A &3Billustrate an example of wireless communications systems301and302, respectively, that each supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. In some examples, the wireless communications systems301and302may implement or be implemented by aspects of the wireless communications system100and200. For example, the wireless communications systems301and302may be implemented by base stations105and UEs115as described with reference toFIG.1.

In the example ofFIG.3A, a victim base station105may transmit a plurality of PDCCH transmissions for CLI mitigation performed by a neighboring aggressor base station105. One or more components of the victim base station105or the aggressor base station105may be considered a network entity, and in some examples the victim base station105and/or the aggressor base station105may have a disaggregated architecture, such as an O-RAN or VRAN architecture

For example, the victim base station105may transmit a plurality of PDCCH transmissions (e.g., repetitions) using a plurality of uplink beams305. For example, a first portion of PDCCH transmissions may be transmitted with an uplink beam305-aand a second portion of the PDCCH transmissions may be transmitted with an uplink beam305-b.

The aggressor base station105may monitor for the PDCCH transmissions. For example, the aggressor base station105may sweep a plurality of downlink beams310to identify a downlink receive beam that causes a relatively low amount of CLI with respect to each of the plurality of uplink transmission beams. For example, the aggressor base station105may use a downlink beam310-ato receive a first PDCCH transmission communicated using uplink beam305-aand to receive a first PDCCH transmission communicated using uplink beam305-b(e.g., the fourth depicted PDCCH repetition ofFIG.3A). The aggressor base station105may use a downlink beam310-bto receive a second PDCCH transmission communicated using uplink beam305-a(e.g., the second depicted PDCCH repetition ofFIG.3A) and to receive a second PDCCH transmission communicated using uplink beam305-b(e.g., the fifth depicted PDCCH repetition ofFIG.3A). The aggressor base station105may use a downlink beam310-cto receive a third PDCCH transmission communicated using uplink beam305-a(e.g., the third depicted PDCCH repetition ofFIG.3A) and to receive a third PDCCH transmission communicated using uplink beam305-b(e.g., the sixth depicted PDCCH repetition ofFIG.3A). In such a way, the aggressor base station105may measure a CLI associated with each uplink/downlink beam pair.

For example, the aggressor base station105may determine that a CLI level associated with the uplink beam305-aand the downlink beam310-ais less than a CLI level threshold, T but a CLI level associated with the uplink beam305-band the same downlink beam,310-ais larger than the CLI threshold. The aggressor base station105may determine that a CLI level associated with the uplink beam305-aand the downlink beam310-cis greater than the CLI level threshold, T but a CLI level associated with the uplink beam305-band the same downlink beam,310-cis less than the CLI threshold, T. Thus, in some examples, because each of downlink beams310-aand310-ccause a CLI level to be greater than the CLI threshold, T with at least one of uplink beams305-aand305-b, there may be another more suitable downlink beam310for selection by the aggressor base station105.

For example, the aggressor base station105may determine that a CLI level associated with the uplink beam305-aand the downlink beam310-bis less than a CLI level threshold, T and that a CLI level associated with the uplink beam305-band the same downlink beam,310-bis also less than the CLI threshold. This may indicate downlink beam310-bas a more suitable downlink beam (e.g., may generally cause less CLI during overlapping communications when each uplink beam of the victim base station is taken into account) than downlink beams310-aand310-c.

Thus, based on sweeping each downlink beam310to receive a PDCCH repetition transmitted by each uplink beam305, the aggressor base station105may determine that downlink beam310-bmay most effectively mitigate CLI at the victim base station105.

The PDCCH repetitions may schedule a number of data communications (e.g., PUSCH communications) for reception by the victim base station105. For example, the victim base station '05may receive a PUSCH communication on each of a number of U symbols. The aggressor base station105may be scheduled to communicate during at least one of the U symbols and may transmit using the selected downlink beam310-bidentified as causing a relatively low amount of CLI based on the measurements performed by the aggressor base station105.

In the example ofFIG.3B, an aggressor base station may transmit a plurality of PDCCH transmissions for CLI mitigation performed by a victim base station.

For example, the aggressor base station105may transmit a plurality of PDCCH transmissions (e.g., repetitions) using a plurality of downlink beams315. For example, a first portion of PDCCH transmissions may be transmitted with a downlink beam315-aand a second portion of the PDCCH transmissions may be transmitted with a downlink beam315-b.

The victim base station105may monitor for the PDCCH transmissions. For example, the victim base station105may sweep a plurality of uplink beams320to identify an uplink receive beam that causes a relatively low amount of CLI with respect to each of the plurality of downlink transmission beams315. For example, the victim base station105may use an uplink beam320-ato receive a first PDCCH transmission communicated using downlink beam315-aand to receive a first PDCCH transmission communicated using downlink beam315-b(e.g., the fourth depicted PDCCH repetition ofFIG.3B). The victim base station105may use an uplink beam320-bto receive a second PDCCH transmission communicated using downlink beam315-a(e.g., the second depicted PDCCH repetition ofFIG.3B) and to receive a second PDCCH transmission communicated using downlink beam315-b(e.g., the fifth depicted PDCCH repetition ofFIG.3B). The victim base station105may use an uplink beam320-cto receive a third PDCCH transmission communicated using downlink beam315-a(e.g., the third depicted PDCCH repetition ofFIG.3B) and to receive a third PDCCH transmission communicated using downlink beam315-b(e.g., the sixth depicted PDCCH repetition ofFIG.3B). In such a way, the victim base station105may measure a CLI associated with each uplink/downlink beam pair.

For example, the victim base station105may determine that a CLI level associated with the downlink beam315-aand the uplink beam320-ais less than a CLI level threshold, T but a CLI level associated with the downlink beam315-band the same uplink beam,320-ais larger than the CLI threshold. The victim base station105may determine that a CLI level associated with the downlink beam315-aand the uplink beam320-cis greater than the CLI level threshold, T but a CLI level associated with the downlink beam315-band the same uplink beam,320-cis less than the CLI threshold, T. Thus, in some examples, because each of uplink beams320-aand320-ccause a CLI level to be greater than the CLI threshold, T with at least one of downlink beams315-aand315-b, there may be another more suitable uplink beam320for selection by the victim base station105.

For example, the victim base station105may determine that a CLI level associated with the downlink beam315-aand the uplink beam320-bis less than a CLI level threshold, T and that a CLI level associated with the downlink beam315-band the same uplink beam,320-bis also less than the CLI threshold. This may indicate uplink beam320-bas a more suitable uplink beam (e.g., may generally cause less CLI during overlapping communications when each downlink beam of the aggressor base station is taken into account) than uplink beams320-aand320-c.

Thus, based on sweeping each uplink beam320to receive a PDCCH repetition transmitted by each downlink beam315, the victim base station105may determine that uplink beam320-bmay most effectively mitigate CLI at the victim base station105.

The PDCCH repetitions may schedule a number of data communications (e.g., PDSCH communications) for transmission by the aggressor base station105. For example, the aggressor base station105may transmit a PDSCH communication on each of a number of D symbols. The victim base station105may be scheduled to communicate during at least one of the D symbols and may communicate using the selected uplink beam320-bidentified as causing a relatively low amount of CLI based on the measurements performed by the victim base station105.

FIG.4illustrates an example of a process flow400that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The process flow400may implement or be implemented by aspects of wireless communications system100or200or300. For example, the process flow400may illustrate operations between a UE115-c, a base station105-c, and a base station105-dwhich may be examples of a UE115and a base station105, as described with reference toFIG.1. One or more components of base station105-cor base station105-dmay be considered a network entity, and in some examples base station105-cand/or base station105-dmay have a disaggregated architecture, such as an O-RAN or VRAN architecture.

In the following description of the process flow400, the operations between the UE115-c, the base station105-c, and the base station105-dmay be transmitted in a different order than the example order shown, or the operations performed by the UE115-c, the base station105-c, and the base station105-dmay be performed in different orders or at different times or by different devices. Some operations may also be omitted from the process flow400, and other operations may be added to the process flow400.

At405, the base station105-dmay transmit a broadcast communication that indicates a downlink control channel (e.g., PDCCH) transmission pattern. For example, the indication may include a set of time or frequency resources, or both via which the base station105-dwill transmit one or more PDCCH repetitions.

At410, the base station105-dmay transmit a plurality of downlink control channel transmissions (e.g., PDCCH repetitions) to the base station105-d. In some examples, the base station may transmit the plurality of downlink control channel transmissions using each of a plurality of transmit beams of the base station105-c. In some examples, the plurality of downlink control channel transmissions schedule communications at the base station105-dto be performed using a communication beam having a same quasi-colocation root reference signal as or that is wider than a beam for communications between the base station105-cand the UE115-c.

At415, the base station105-cmay monitor for the plurality of downlink control channel transmissions (e.g., PDCCH transmissions) from the base station105-daccording to the downlink control channel transmission pattern. For example, the base station105-cmay monitor the time or frequency resources or both, indicated by the downlink control channel transmission pattern for the PDCCH repetitions. In some examples, the base station105-cmay monitor using a plurality of receive beams of the base station105-c.

At420, the base station105-cmay perform one or more CLI measurements (e.g., RSRP measurements) based on receiving at least one transmission of the plurality of PDCCH transmissions. For example, the base station105-cmay receive, using a first receive beam, the at least one transmission from the base station105-dusing a first transmit beam. The base station105-cmay measure the cross-link interference caused by communications using the pair of first beams. In some examples, the measured CLI may be compared to a threshold CLI. The base station105-cmay perform a CLI measurement for each receive beam that receives a downlink control channel transmission from the base station105-dusing each of the plurality of transmit beams. That is, a CLI measurement may be performed for each receive beam/transmit beam pairing.

At425, the base station105-cmay select a beam for communications with the UE115-c. In some examples, the base station105-cmay be an aggressor base station. That is, downlink transmissions performed by the base station105-cmay cause interference at the base station105-dwhen receiving uplink communications at a same time as the downlink transmissions (e.g., using a set of resources that at least partially overlap with resources for receiving the uplink communications). In such examples, the base station105-cmay select a transmit beam for transmitting communications to the UE115-caccording to the CLI measurements performed at420. In such examples, the plurality of receive beams may be downlink receive beams. In some examples, the base station105-cmay select a transmit beam associated with a lowest CLI level of the CLI measurements, or may select a transmit beam associated with a CLI level that is smaller than a threshold CLI level, or may selecting a transmit beam associated with a CLI level that is higher than a first threshold.

If the base station105-cselects a transmit beam having a CLI level that is higher than the first threshold, then at430, the base station105-cmay communicate with the UE115-cby transmitting using the selected transmit beam and using a reduced transmission power to mitigate CLI caused by the selected transmit beam.

In some examples, the base station105-cmay be a victim base station. That is, downlink transmissions performed by the base station105-dmay cause interference at the base station105-cwhen receiving uplink communications at a same time as the downlink transmissions (e.g., using a set of resources that at least partially overlap with resources for receiving the uplink communications). In such examples, the base station105-cmay select a receive beam for receiving communications from the UE115-caccording to the CLI measurements performed at420. In such examples, the plurality of receive beams may be uplink receive beams. In some examples, the base station105-cmay select a receive beam having a lowest CLI level according to the CLI measurements performed at420, or may select a receive beam having a CLI level that is smaller than a threshold CLI level, or may select a receive beam having a CLI level that is higher than a threshold.

If the base station105-cselects a receive beam having a CLI level that is higher than the threshold, the base station may transmit signaling indicating a power increase to the UE115-c, then at430, the base station105-cmay communicate with the UE115-cby receiving, using the selected receive beam, an uplink transmission from the UE115-cbased on the power increase to mitigate CLI experienced by the selected receive beam.

At430, the base station105-cmay communicate with the UE115-cusing the selected communication beam and a first set of resources that at least partially overlap in time and frequency with scheduled communications at the base station105-d. However, using the communication beam selected based on the CLI measurements may mitigate the effects of CLI caused by the overlapping communications.

At435, the base station105-dmay communicate with one or more other entities over the first set of resources that at least partially overlap in time and frequency with scheduled communications at the base station105-c.

FIG.5shows a block diagram500of a device505that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The device505may be an example of aspects of a network entity, such as one or more components of a base station105as described herein. The device505may include a receiver510, a transmitter515, and a communications manager520. The device505may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver510may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to OTA signaling for inter-base station CLI measurements). Information may be passed on to other components of the device505. The receiver510may utilize a single antenna or a set of multiple antennas.

The transmitter515may provide a means for transmitting signals generated by other components of the device505. For example, the transmitter515may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to OTA signaling for inter-base station CLI measurements). In some examples, the transmitter515may be co-located with a receiver510in a transceiver module. The transmitter515may utilize a single antenna or a set of multiple antennas.

The communications manager520, the receiver510, the transmitter515, or various combinations thereof or various components thereof may be examples of means for performing various aspects of OTA signaling for inter-base station CLI measurements as described herein. For example, the communications manager520, the receiver510, the transmitter515, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager520, the receiver510, the transmitter515, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory).

Additionally or alternatively, in some examples, the communications manager520, the receiver510, the transmitter515, or various combinations or components thereof may be implemented in code (e.g., as communications management software) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager520, the receiver510, the transmitter515, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, a graphics processing unit (GPU) an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure).

In some examples, the communications manager520may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver510, the transmitter515, or both. For example, the communications manager520may receive information from the receiver510, send information to the transmitter515, or be integrated in combination with the receiver510, the transmitter515, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager520may support wireless communication in accordance with examples as disclosed herein. For example, the communications manager520may be configured as or otherwise support a means for receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The communications manager520may be configured as or otherwise support a means for monitoring a set of multiple receive beams at a second network entity for a set of multiple downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern. The communications manager520may be configured as or otherwise support a means for selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the set of multiple receive beams in accordance with the monitoring. The communications manager520may be configured as or otherwise support a means for communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity.

Additionally or alternatively, the communications manager520may support wireless communication in accordance with examples as disclosed herein. For example, the communications manager520may be configured as or otherwise support a means for broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associating with the first network entity. The communications manager520may be configured as or otherwise support a means for transmitting a set of multiple downlink control channel transmissions using a set of multiple transmit beams according to the downlink control channel transmission pattern, where the set of multiple downlink control channel transmissions schedule resources for communications at the first network entity. The communications manager520may be configured as or otherwise support a means for communicating during the scheduled resources, where the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity.

By including or configuring the communications manager520in accordance with examples as described herein, the device505(e.g., a processor controlling or otherwise coupled to the receiver510, the transmitter515, the communications manager520, or a combination thereof) may support techniques for more efficient utilization of communication resources, among other examples.

FIG.6shows a block diagram600of a device605that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The device605may be an example of aspects of a device505or a network entity, such as one or more components of a base station105, as described herein. The device605may include a receiver610, a transmitter615, and a communications manager620. The device605may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver610may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to OTA signaling for inter-base station CLI measurements). Information may be passed on to other components of the device605. The receiver610may utilize a single antenna or a set of multiple antennas.

The transmitter615may provide a means for transmitting signals generated by other components of the device605. For example, the transmitter615may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to OTA signaling for inter-base station CLI measurements). In some examples, the transmitter615may be co-located with a receiver610in a transceiver module. The transmitter615may utilize a single antenna or a set of multiple antennas.

The device605, or various components thereof, may be an example of means for performing various aspects of OTA signaling for inter-base station CLI measurements as described herein. For example, the communications manager620may include a downlink control channel transmission pattern component625, a monitoring component630, a beam selection component635, a beam communication component640, a downlink control channel transmission pattern broadcast component645, a downlink control channel transmission pattern transmission component650, a scheduled communications component655, or any combination thereof. The communications manager620may be an example of aspects of a communications manager520as described herein. In some examples, the communications manager620, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver610, the transmitter615, or both. For example, the communications manager620may receive information from the receiver610, send information to the transmitter615, or be integrated in combination with the receiver610, the transmitter615, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager620may support wireless communication in accordance with examples as disclosed herein. The downlink control channel transmission pattern component625may be configured as or otherwise support a means for receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The monitoring component630may be configured as or otherwise support a means for monitoring a set of multiple receive beams at a second network entity for a set of multiple downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern. The beam selection component635may be configured as or otherwise support a means for selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the set of multiple receive beams in accordance with the monitoring. The beam communication component640may be configured as or otherwise support a means for communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity.

Additionally or alternatively, the communications manager620may support wireless communication in accordance with examples as disclosed herein. The downlink control channel transmission pattern broadcast component645may be configured as or otherwise support a means for broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associated with the first network entity. The downlink control channel transmission pattern transmission component650may be configured as or otherwise support a means for transmitting a set of multiple downlink control channel transmissions using a set of multiple transmit beams according to the downlink control channel transmission pattern, where the set of multiple downlink control channel transmissions schedule resources for communications at the first network entity. The scheduled communications component655may be configured as or otherwise support a means for communicating during the scheduled resources, where the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity.

FIG.7shows a block diagram700of a communications manager720that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The communications manager720may be an example of aspects of a communications manager520, a communications manager620, or both, as described herein. The communications manager720, or various components thereof, may be an example of means for performing various aspects of OTA signaling for inter-base station CLI measurements as described herein. For example, the communications manager720may include a downlink control channel transmission pattern component725, a monitoring component730, a beam selection component735, a beam communication component740, a downlink control channel transmission pattern broadcast component745, a downlink control channel transmission pattern transmission component750, a scheduled communications component755, a transmit beam communication component760, a receive beam communication component765, a CLI measurement component770, a power configuration component775, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager720may support wireless communication in accordance with examples as disclosed herein. The downlink control channel transmission pattern component725may be configured as or otherwise support a means for receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The monitoring component730may be configured as or otherwise support a means for monitoring a set of multiple receive beams at a second network entity for a set of multiple downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern. The beam selection component735may be configured as or otherwise support a means for selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the set of multiple receive beams in accordance with the monitoring. The beam communication component740may be configured as or otherwise support a means for communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity.

In some examples, to support communication beam includes a transmit beam and communicating with the UE, the transmit beam communication component760may be configured as or otherwise support a means for performing a downlink transmission from the second network entity to the UE using the selected transmit beam, where the scheduled communication at the first network entity includes an uplink transmission to the first network entity scheduled by the set of multiple downlink control channel transmissions.

In some examples, to support communication beam includes a receive beam and communicating with the UE, the receive beam communication component765may be configured as or otherwise support a means for receiving an uplink communication from the UE using the selected receive beam, where the scheduled communication at the first network entity includes a downlink transmission from the first network entity scheduled by the set of multiple downlink control channel transmissions.

In some examples, the receive beam communication component765may be configured as or otherwise support a means for receiving, using a first receive beam of the set of multiple receive beams, at least one downlink control channel transmission of the set of multiple downlink control channel transmissions associated with a transmit beam of the first network entity based on the monitoring. In some examples, the CLI measurement component770may be configured as or otherwise support a means for measuring a cross-link interference level associated with the at least one downlink control channel transmission as one of the one or more cross-link interference measurements, where selecting the transmit beam is based on the measuring.

In some examples, to support selecting the communication beam, the beam selection component735may be configured as or otherwise support a means for selecting a transmit beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements. In some examples, to support selecting the communication beam, the beam selection component735may be configured as or otherwise support a means for selecting a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.

In some examples, to support selecting the communication beam, the beam selection component735may be configured as or otherwise support a means for selecting a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a first threshold, where the communicating with the UE includes. In some examples, to support selecting the communication beam, the beam selection component735may be configured as or otherwise support a means for transmitting, using the selected transmit beam, a downlink transmission using a reduced transmission power based on the cross-link interference level associated with the selected transmit beam being higher than the first threshold.

In some examples, to support selecting the communication beam, the beam selection component735may be configured as or otherwise support a means for selecting a receive beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements. In some examples, to support selecting the communication beam, the beam selection component735may be configured as or otherwise support a means for selecting a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.

In some examples, to support selecting the communication beam, the beam selection component735may be configured as or otherwise support a means for selecting a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a threshold. In some examples, to support selecting the communication beam, the power configuration component775may be configured as or otherwise support a means for transmitting signaling indicating a power increase to the UE, where the communicating with the UE includes. In some examples, to support selecting the communication beam, the receive beam communication component765may be configured as or otherwise support a means for receiving, using the selected receive beam from the UE, an uplink transmission based on the power increase.

In some examples, the downlink control channel transmission pattern includes a set of time and frequency resources for a set of multiple downlink control channel transmission repetitions.

In some examples, the one or more cross-link interference measurements include one or more reference signal receive power measurements for each receive beam of the set of multiple receive beams.

In some examples, the set of multiple receive beams are downlink beams.

In some examples, the set of multiple receive beams are uplink beams.

Additionally or alternatively, the communications manager720may support wireless communication in accordance with examples as disclosed herein. The downlink control channel transmission pattern broadcast component745may be configured as or otherwise support a means for broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associated with the first network entity. The downlink control channel transmission pattern transmission component750may be configured as or otherwise support a means for transmitting a set of multiple downlink control channel transmissions using a set of multiple transmit beams according to the downlink control channel transmission pattern, where the set of multiple downlink control channel transmissions schedule resources for communications at the first network entity. The scheduled communications component755may be configured as or otherwise support a means for communicating during the scheduled resources, where the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity.

In some examples, the scheduled resources for communications at the first network entity include resources for an uplink transmission to the first network entity.

In some examples, to support communicating during the scheduled resources, the scheduled communications component755may be configured as or otherwise support a means for receiving the uplink transmission during the scheduled resources, where the scheduled communication at the second network entity is a downlink transmission.

In some examples, the scheduled resources for communications at the first network entity include resources for a downlink communication by the first network entity.

In some examples, to support communicating during the scheduled resources, the scheduled communications component755may be configured as or otherwise support a means for transmitting the downlink communication during the scheduled resources, where scheduled communication at the second network entity is an uplink transmission.

In some examples, the set of multiple downlink control channel transmissions schedule the communications at the first network entity to be performed using a communication beam having a same quasi-colocation root reference signal as a beam for transmitting or receiving the scheduled communication.

In some examples, the downlink control channel transmission pattern includes a set of time and frequency resources for a set of multiple downlink control channel transmission repetitions.

FIG.8shows a diagram of a system800including a device805that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The device805may be an example of or include the components of a device505, a device605, or a network entity, such as one or more components of a base station105, as described herein. The device805may communicate wirelessly with one or more base stations105, UEs115, or any combination thereof. The device805may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager820, a network communications manager810, a transceiver815, an antenna825, a memory830, code835, a processor840, and an inter-station communications manager845. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus850).

The network communications manager810may manage communications with a core network130(e.g., via one or more wired backhaul links). For example, the network communications manager810may manage the transfer of data communications for client devices, such as one or more UEs115.

In some cases, the device805may include a single antenna825. However, in some other cases the device805may have more than one antenna825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver815may communicate bi-directionally, via the one or more antennas825, wired, or wireless links as described herein. For example, the transceiver815may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver815may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas825for transmission, and to demodulate packets received from the one or more antennas825. The transceiver815, or the transceiver815and one or more antennas825, may be an example of a transmitter515, a transmitter615, a receiver510, a receiver610, or any combination thereof or component thereof, as described herein.

The memory830may include random-access memory (RAM) and read-only memory (ROM). The memory830may store computer-readable, computer-executable code835including instructions that, when executed by the processor840, cause the device805to perform various functions described herein. The code835may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code835may not be directly executable by the processor840but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory830may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor840may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a GPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor840may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor840. The processor840may be configured to execute computer-readable instructions stored in a memory (e.g., the memory830) to cause the device805to perform various functions (e.g., functions or tasks supporting OTA signaling for inter-base station CLI measurements). For example, the device805or a component of the device805may include a processor840and memory830coupled with or to the processor840, the processor840and memory830configured to perform various functions described herein.

The inter-station communications manager845may manage communications with other base stations105, and may include a controller or scheduler for controlling communications with UEs115in cooperation with other base stations105. For example, the inter-station communications manager845may coordinate scheduling for transmissions to UEs115for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager845may provide an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between base stations105.

The communications manager820may support wireless communication in accordance with examples as disclosed herein. For example, the communications manager820may be configured as or otherwise support a means for receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The communications manager820may be configured as or otherwise support a means for monitoring a set of multiple receive beams at a second network entity for a set of multiple downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern. The communications manager820may be configured as or otherwise support a means for selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the set of multiple receive beams in accordance with the monitoring. The communications manager820may be configured as or otherwise support a means for communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity.

Additionally or alternatively, the communications manager820may support wireless communication in accordance with examples as disclosed herein. For example, the communications manager820may be configured as or otherwise support a means for broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associating with the first network entity. The communications manager820may be configured as or otherwise support a means for transmitting a set of multiple downlink control channel transmissions using a set of multiple transmit beams according to the downlink control channel transmission pattern, where the set of multiple downlink control channel transmissions schedule resources for communications at the first network entity. The communications manager820may be configured as or otherwise support a means for communicating during the scheduled resources, where the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity.

By including or configuring the communications manager820in accordance with examples as described herein, the device805may support techniques for improved communication reliability, reduced latency, improved user experience related to more efficient utilization of communication resources, and improved coordination between devices, among other examples.

In some examples, the communications manager820may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver815, the one or more antennas825, or any combination thereof. Although the communications manager820is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager820may be supported by or performed by the processor840, the memory830, the code835, or any combination thereof. For example, the code835may include instructions executable by the processor840to cause the device805to perform various aspects of OTA signaling for inter-base station CLI measurements as described herein, or the processor840and the memory830may be otherwise configured to perform or support such operations.

FIG.9shows a flowchart illustrating a method900that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The operations of the method900may be implemented by a base station or its components as described herein. For example, the operations of the method900may be performed by a base station105as described with reference toFIGS.1through8. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At905, the method may include receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The operations of905may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of905may be performed by a downlink control channel transmission pattern component725as described with reference toFIG.7.

At910, the method may include monitoring a set of multiple receive beams at a second network entity for a set of multiple downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern. The operations of910may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of910may be performed by a monitoring component730as described with reference toFIG.7.

At915, the method may include selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the set of multiple receive beams in accordance with the monitoring. The operations of915may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of915may be performed by a beam selection component735as described with reference toFIG.7.

At920, the method may include communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity. The operations of920may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of920may be performed by a beam communication component740as described with reference toFIG.7.

FIG.10shows a flowchart illustrating a method1000that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The operations of the method1000may be implemented by a base station or its components as described herein. For example, the operations of the method1000may be performed by a base station105as described with reference toFIGS.1through8. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At1005, the method may include receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The operations of1005may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1005may be performed by a downlink control channel transmission pattern component725as described with reference toFIG.7.

At1010, the method may include monitoring a set of multiple receive beams at a second network entity for a set of multiple downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern. The operations of1010may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1010may be performed by a monitoring component730as described with reference toFIG.7.

At1015, the method may include selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the set of multiple receive beams in accordance with the monitoring. The operations of1015may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1015may be performed by a beam selection component735as described with reference toFIG.7.

At1020, the method may include communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity. The operations of1020may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1020may be performed by a beam communication component740as described with reference toFIG.7.

At1025, the method may include performing a downlink transmission from the second network entity to the UE using the selected transmit beam, where the scheduled communication at the first network entity includes an uplink transmission to the first network entity scheduled by the set of multiple downlink control channel transmissions. The operations of1025may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1025may be performed by a transmit beam communication component760as described with reference toFIG.7.

FIG.11shows a flowchart illustrating a method1100that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The operations of the method1100may be implemented by a base station or its components as described herein. For example, the operations of the method1100may be performed by a base station105as described with reference toFIGS.1through8. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At1105, the method may include receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The operations of1105may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1105may be performed by a downlink control channel transmission pattern component725as described with reference toFIG.7.

At1110, the method may include monitoring a set of multiple receive beams at a second network entity for a set of multiple downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern. The operations of1110may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1110may be performed by a monitoring component730as described with reference toFIG.7.

At1115, the method may include selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the set of multiple receive beams in accordance with the monitoring. The operations of1115may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1115may be performed by a beam selection component735as described with reference toFIG.7.

At1120, the method may include communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity. The operations of1120may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1120may be performed by a beam communication component740as described with reference toFIG.7.

At1125, the method may include receiving an uplink communication from the UE using the selected receive beam, where the scheduled communication at the first network entity includes a downlink transmission from the first network entity scheduled by the set of multiple downlink control channel transmissions. The operations of1125may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1125may be performed by a receive beam communication component765as described with reference toFIG.7.

FIG.12shows a flowchart illustrating a method1200that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The operations of the method1200may be implemented by a base station or its components as described herein. For example, the operations of the method1200may be performed by a base station105as described with reference toFIGS.1through8. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At1205, the method may include broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associated with the first network entity. The operations of1205may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1205may be performed by a downlink control channel transmission pattern broadcast component745as described with reference toFIG.7.

At1210, the method may include transmitting a set of multiple downlink control channel transmissions using a set of multiple transmit beams according to the downlink control channel transmission pattern, where the set of multiple downlink control channel transmissions schedule resources for communications at the first network entity. The operations of1210may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1210may be performed by a downlink control channel transmission pattern transmission component750as described with reference toFIG.7.

At1215, the method may include communicating during the scheduled resources, where the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity. The operations of1215may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1215may be performed by a scheduled communications component755as described with reference toFIG.7.

FIG.13shows a flowchart illustrating a method1300that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The operations of the method1300may be implemented by a base station or its components as described herein. For example, the operations of the method1300may be performed by a base station105as described with reference toFIGS.1through8. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At1305, the method may include broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associated with the first network entity. The operations of1305may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1305may be performed by a downlink control channel transmission pattern broadcast component745as described with reference toFIG.7.

At1310, the method may include transmitting a set of multiple downlink control channel transmissions using a set of multiple transmit beams according to the downlink control channel transmission pattern, where the set of multiple downlink control channel transmissions schedule resources for communications at the first network entity. The operations of1310may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1310may be performed by a downlink control channel transmission pattern transmission component750as described with reference toFIG.7.

At1315, the method may include communicating during the scheduled resources, where the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity. The operations of1315may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1315may be performed by a scheduled communications component755as described with reference toFIG.7.

At1320, the method may include receiving an uplink transmission during the scheduled resources, where the scheduled communication at the second network entity is a downlink transmission. The operations of1320may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1320may be performed by a scheduled communications component755as described with reference toFIG.7.

FIG.14shows a flowchart illustrating a method1400that supports OTA signaling for inter-base station CLI measurements in accordance with aspects of the present disclosure. The operations of the method1400may be implemented by a base station or its components as described herein. For example, the operations of the method1400may be performed by a base station105as described with reference toFIGS.1through8. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At1405, the method may include broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associated with the first network entity. The operations of1405may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1405may be performed by a downlink control channel transmission pattern broadcast component745as described with reference toFIG.7.

At1410, the method may include transmitting a set of multiple downlink control channel transmissions using a set of multiple transmit beams according to the downlink control channel transmission pattern, where the set of multiple downlink control channel transmissions schedule resources for communications at the first network entity. The operations of1410may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1410may be performed by a downlink control channel transmission pattern transmission component750as described with reference toFIG.7.

At1415, the method may include communicating during the scheduled resources, where the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity. The operations of1415may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1415may be performed by a scheduled communications component755as described with reference toFIG.7.

At1420, the method may include transmitting a downlink communication during the scheduled resources, where scheduled communication at the second network entity is an uplink transmission. The operations of1420may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1420may be performed by a scheduled communications component755as described with reference toFIG.7.

The following provides an overview of aspects of the present disclosure:Aspect 1: A method for wireless communication, comprising: receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity; monitoring a plurality of receive beams at a second network entity for a plurality of downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern; selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the plurality of receive beams in accordance with the monitoring; and communicating with a UE using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity.Aspect 2: The method of aspect 1, wherein the communication beam comprises a transmit beam and communicating with the UE comprises: performing a downlink transmission from the second network entity to the UE using the selected transmit beam, wherein the scheduled communication at the first network entity comprises an uplink transmission to the first network entity scheduled by the plurality of downlink control channel transmissions.Aspect 3: The method of any of aspects 1 through 2, wherein the communication beam comprises a receive beam and communicating with the UE comprises: receiving an uplink communication from the UE using the selected receive beam, wherein the scheduled communication at the first network entity comprises a downlink transmission from the first network entity scheduled by the plurality of downlink control channel transmissions.Aspect 4: The method of any of aspects 1 through 3, further comprising: receiving, using a first receive beam of the plurality of receive beams, at least one downlink control channel transmission of the plurality of downlink control channel transmissions associated with a transmit beam of the first network entity based at least in part on the monitoring; and measuring a cross-link interference level associated with the at least one downlink control channel transmission as one of the one or more cross-link interference measurements, wherein selecting the transmit beam is based at least in part on the measuringAspect 5: The method of any of aspects 1 through 4, wherein selecting the communication beam comprises: selecting a transmit beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements; or selecting a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.Aspect 6: The method of any of aspects 1 through 5, wherein selecting the communication beam comprises: selecting a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a first threshold, wherein the communicating with the UE comprises: transmitting, using the selected transmit beam, a downlink transmission using a reduced transmission power based at least in part on the cross-link interference level associated with the selected transmit beam being higher than the first threshold.Aspect 7: The method of any of aspects 1 through 6, wherein selecting the communication beam comprises: selecting a receive beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements; or selecting a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.Aspect 8: The method of any of aspects 1 through 7, wherein selecting the communication beam comprises: selecting a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a threshold; and transmitting signaling indicating a power increase to the UE, wherein the communicating with the UE comprises: receiving, using the selected receive beam from the UE, an uplink transmission based at least in part on the power increase.Aspect 9: The method of any of aspects 1 through 8, wherein the downlink control channel transmission pattern comprises a set of time and frequency resources for a plurality of downlink control channel transmission repetitions.Aspect 10: The method of any of aspects 1 through 9, wherein the one or more cross-link interference measurements comprise one or more reference signal receive power measurements for each receive beam of the plurality of receive beams.Aspect 11: The method of any of aspects 1 through 10, wherein the plurality of receive beams are downlink beams.Aspect 12: The method of any of aspects 1 through 11, wherein the plurality of receive beams are uplink beams.Aspect 13: A method for wireless communication, comprising: broadcasting, by a first network entity, an indication of a downlink control channel transmission pattern associated with the first network entity; transmitting a plurality of downlink control channel transmissions using a plurality of transmit beams according to the downlink control channel transmission pattern, wherein the plurality of downlink control channel transmissions schedule resources for communications at the first network entity; and communicating during the scheduled resources, wherein the scheduled resources at least partially overlap in time and frequency with a scheduled communication at a second network entity.Aspect 14: The method of aspect 13, wherein the scheduled resources for communications at the first network entity comprise resources for an uplink transmission to the first network entity.Aspect 15: The method of aspect 14, wherein communicating during the scheduled resources comprises: receiving the uplink transmission during the scheduled resources, wherein the scheduled communication at the second network entity is a downlink transmission.Aspect 16: The method of any of aspects 13 through 15, wherein the scheduled resources for communications at the first network entity comprise resources for a downlink communication by the first network entity.Aspect 17: The method of aspect 16, wherein communicating during the scheduled resources comprises: transmitting the downlink communication during the scheduled resources, wherein scheduled communication at the second network entity is an uplink transmission.Aspect 18: The method of any of aspects 13 through 17, wherein the plurality of downlink control channel transmissions schedule the communications at the first network entity to be performed using a communication beam having a same quasi-colocation root reference signal as a beam for transmitting or receiving the scheduled communication.Aspect 19: The method of any of aspects 13 through 18, wherein the downlink control channel transmission pattern comprises a set of time and frequency resources for a plurality of downlink control channel transmission repetitions.Aspect 20: An apparatus for wireless communication, comprising at least one processor; memory coupled with the at least one processor, the memory storing instructions executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 12.Aspect 21: An apparatus for wireless communication, comprising at least one means for performing a method of any of aspects 1 through 12.Aspect 22: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by at least one processor to perform a method of any of aspects 1 through 12.Aspect 23: An apparatus for wireless communication, comprising at least one processor; memory coupled with the at least one processor, the memory storing instructions executable by the processor to cause the apparatus to perform a method of any of aspects 13 through 19.Aspect 24: An apparatus for wireless communication, comprising at least one means for performing a method of any of aspects 13 through 19.Aspect 25: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by at least one processor to perform a method of any of aspects 13 through 19.

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

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

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

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

The functions described herein may be implemented in hardware, software executed by a processor, or any combination thereof. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

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

As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.” As used herein, the term “and/or,” when used in a list of two or more items, means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed. For example, if a composition is described as containing components A, B, and/or C, the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

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

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

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

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