WO2021248444A1

WO2021248444A1 - Receive beam control

Info

Publication number: WO2021248444A1
Application number: PCT/CN2020/095793
Authority: WO
Inventors: Qunfeng HE; Huilin Xu; Mihir Vijay Laghate; Yuwei REN
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-12-16
Anticipated expiration: 2022-12-12

Abstract

A wireless communication device is described. The wireless communication device includes a memory. The wireless communication device also includes a processor in electronic communication with the memory. The processor is configured to measure cross-link interference (CLI) for respective receive beams to produce a set of CLI measurements. The processor is also configured to determine whether a beam switching criterion is satisfied based on the set of CLI measurements. The processor is further configured to switch a serving receive beam in response to determining that the beam switching criterion is satisfied.

Description

RECEIVE BEAM CONTROL

FIELD OF DISCLOSURE

The present disclosure relates generally to electronic devices. More specifically, the present disclosure relates to systems and methods for receive beam control.

BACKGROUND

In the last several decades, the use of electronic devices has become common. In particular, advances in electronic technology have reduced the cost of increasingly complex and useful electronic devices. Cost reduction and consumer demand have proliferated the use of electronic devices such that they are practically ubiquitous in modern society. As the use of electronic devices has expanded, so has the demand for new and improved features of electronic devices. More specifically, electronic devices that perform new functions and/or that perform functions faster, more efficiently, or with higher quality are often sought after.

Some electronic devices (e.g., cellular phones, smartphones, laptop computers, etc. ) communicate with other electronic devices. For example, electronic devices may transmit and/or receive radio frequency (RF) signals to communicate. Improving electronic device communication may be beneficial.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a block diagram illustrating one example of a wireless communication device in which systems and methods for receive beam control may be implemented;

Figure 2 is a flow diagram illustrating one configuration of a method for receive beam control;

Figure 3 is a diagram illustrating an example of a transmission and reception schedule of an aggressor device and a transmission and reception schedule of a victim device;

Figure 4 is a diagram illustrating an example of cross-link interference (CLI) ;

Figure 5 is a diagram illustrating another example of CLI;

Figure 6 is a diagram illustrating an example of a wireless communication device with relatively wide receive beams;

Figure 7 is a diagram illustrating another example of a wireless communication device;

Figure 8 is a diagram illustrating an example of a base station, an aggressor device, and a victim device;

Figure 9 is a diagram illustrating another example of a base station, an aggressor device, and a victim device;

Figure 10 is a diagram illustrating another example of a base station, an aggressor device, and a victim device;

Figure 11 is a flow diagram illustrating another configuration of a method for receive beam control; and

Figure 12 illustrates certain components that may be included within an electronic device configured to implement various configurations of the systems and methods disclosed herein.

DETAILED DESCRIPTION

Some configurations of the systems and methods disclosed herein relate to receive beam control. For example, a wireless communication device may perform beamforming to form a receive (Rx) beam. In receive beamforming, different phase shifts (e.g., delays) and/or weights (e.g., amplification) may be applied to signals received from different antennas of an antenna array to form a receive beam in a directional range with increased sensitivity. Different directional ranges (e.g., widths) of a receive beam and/or nulls may be achieved with various phase shifts and/or weights. For example, the directionality and/or width of a receive beam may be controlled to improve reception of a wireless signal and/or to reduce interference. Receive beam control may include selecting and/or switching receive beam direction and/or width.

Cross-link interference (CLI) may occur when nearby wireless communication devices (e.g., user equipments (UEs) ) utilize overlapping resources (e.g., time resources, frequency resources, and/or spatial resources) . For example, a wireless communication device causing the CLI may be referred to as an aggressor device, and a wireless communication device that experiences the CLI may be referred to as a victim device. In a time-division duplexing (TDD) communication system, for example, nearby wireless communication devices may have different uplink (UL) and downlink (DL) slot formats. The victim device may receive a transmission from the aggressor device, where an uplink symbol (e.g., an interfering uplink symbol) of the aggressor device collides with a downlink symbol of the victim device, thereby causing CLI to occur. For instance, CLI may be caused by an uplink transmission (e.g., physical uplink control channel (PUCCH) transmission, physical uplink shared channel (PUSCH) transmission, physical random access channel (PRACH) preamble transmission, sounding reference signal (SRS) transmission, etc. ) from the aggressor device. Some examples of the systems and methods disclosed herein may enable receive beam control based on measured CLI. For example, a wireless communication device may control a receive beam to reduce CLI. Some examples of the systems and methods described herein may relate to employing CLI measurement for receive beam selection.

Various configurations are now described with reference to the Figures, where like reference numbers may indicate functionally similar elements. The systems and methods as generally described and illustrated in the Figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of several configurations, as represented in the Figures, is not intended to limit scope, as claimed, but is merely representative of the systems and methods.

Figure 1 is a block diagram illustrating one example of a wireless communication device 102 in which systems and methods for receive beam control may be implemented. The wireless communication device 102 may be a device or apparatus for transmitting and/or receiving RF signals. Examples of the wireless communication device 102 may include user equipments (UEs) , smartphones, tablet devices, computing devices, computers (e.g., desktop computers, laptop computers, etc. ) , televisions, cameras, virtual reality devices (e.g., headsets) , vehicles (e.g., semi-autonomous vehicles, autonomous vehicles, etc. ) , robots, aircraft, drones, unmanned aerial vehicles (UAVs) , healthcare equipment, gaming consoles, Internet of Things (IoT) devices, etc. The wireless communication device 102 may include one or more components or elements. One or more of the components or elements may be implemented in hardware (e.g., circuitry) or a combination of hardware and instructions (e.g., a processor with software stored in memory) .

In some configurations, the wireless communication device 102 may include a processor 110, a memory 104, one or more transceivers 106, and/or antennas 108a–n. In some configurations, the wireless communication device 102 may include one or more other components and/or elements. For example, the wireless communication device 102 may include a display (e.g., touchscreen) . The processor 110 may be integrated circuitry configured to perform one or more functions. In some configurations, the processor 110 may execute instructions to perform the one or more functions. In some configurations, the processor 110 may include one or more functionalities that are structurally implemented in the processor 110. In some configurations, the processor 110 may be a baseband processor, a modem, an application processor, and/or any combination thereof. The processor 110 may be coupled to (e.g., in electronic communication with) the memory 104 and/or transceiver (s) 106.

The memory 104 may store instructions and/or data. The processor 110 may access (e.g., read from and/or write to) the memory 104. Examples of instructions and/or data that may be stored by the memory 104 may include CLI measurement instructions 112, beam selection instructions 114, measurement data 116, and/or instructions for other elements, etc.

The transceiver (s) 106 may enable the wireless communication device 102 to communicate with one or more other electronic devices. For example, the transceiver (s) 106 may provide an interface for wireless communications. In some configurations, the transceiver 106 may be coupled to antennas 108a–n for transmitting and/or receiving radio frequency (RF) signals. For example, the transceiver 106 may enable one or more modes of wireless (e.g., cellular, wireless local area network (WLAN) , personal area network (PAN) , etc. ) communication. The transceiver (s) 106 may include one or more transmitters and/or one or more receivers. In some configurations, the transceiver (s) 106 may be included in an RF front-end and/or may include an RF front-end. In some configurations, the transceiver (s) 106 may include one or more switches, one or more filters, one or more power amplifiers, one or more downconverters, and/or one or more upconverters, etc., to enable wireless communication.

In some configurations, multiple transceivers 106 may be implemented and/or utilized. For example, one transceiver 106 may be utilized for cellular (e.g., 3G, Long Term Evolution (LTE) , CDMA, 5G, etc. ) communications, and yet another transceiver 106 may be utilized for wireless local area network (WLAN) (e.g., Institute of Electrical and Electronics Engineers (IEEE) 802.11) communications. In some configurations, the transceiver (s) 106 may send information (e.g., CLI information, etc. ) to and/or receive information (e.g., CLI configuration information) from another device (e.g., base station, evolved NodeB (eNodeB) , next generation NodeB (gNB) , etc. ) . In some examples, one or more network devices (e.g., base stations) may configure CLI resources for CLI measurement. For example, the wireless communication device 102 may receive a message from a base station that indicates CLI resources to measure CLI. For example, the message may indicate time and/or frequency resources for measuring CLI caused by another wireless communication device. In some examples, the message may indicate a measurement resource configuration including periodicity, frequency resource block (s) (RBs) , slot (s) , and/or symbol (s) (e.g., orthogonal frequency-division multiplexing (OFDM) symbol (s) ) , etc., where the CLI may be measured. For instance, the message may indicate resources used by one or more nearby wireless communication devices (e.g., aggressor device (s) ) for uplink transmissions. In some approaches, the message may indicate one or more resources (e.g., slots) used by a wireless communication device to send an SRS in the uplink direction.

In some configurations, the memory 104 may include CLI measurement instructions 112. The CLI measurement instructions 112 may be instructions for measuring CLI. For example, the processor 110 may execute the CLI measurement instructions to measure CLI for respective receive beams to produce a set of CLI measurements. For example, the wireless communication device 102 may receive one or more interfering signals using the antenna (s) 108a–n. The interfering signal (s) may be received on CLI resources indicated by a message received from a base station. The processor 110 may measure CLI for respective receive beams. For example, the wireless communication device 102 may measure CLI for different receive beams. In some approaches, the wireless communication device 102 (e.g., processor 110) may set a receive beam (using a precoding matrix, for instance) and measure CLI corresponding to that receive beam for a sequence of receive beams.

In some examples, the respective receive beams may be a set of receive beams with different directions and/or different widths. For instance, the respective receive beams may include receive beams with directions ranging over 30, 45, 60, 90, 120, 135, 180, 270, or 360 degrees, etc., relative to the wireless communication device 102 and/or an array of antennas 108a–n. In some examples, the respective receive beams may include receive beams with different widths (e.g., widths of 5, 10, 15, 25, 45, 70, 90, 120, and/or 180 degrees, etc. ) . In some examples, the directions and/or widths of the receive beams may be controlled by the processor 110. For instance, the processor 110 may apply different receive beamforming and/or precoding matrices to set the respective receive beams. The processor 110 may measure the CLI (based on the configured CLI resources, for example) for each respective receive beam.

In some examples, the respective receive beams may include one or more serving receive beams and one or more non-serving receive beams. A serving receive beam may be a receive beam that is utilized (e.g., that is being utilized currently) for receiving signals from a base station. A non-serving receive beam may be a receive beam that is not utilized (e.g., that is not being utilized currently) for receiving signals from a base station. In some approaches, the wireless communication device 102 may be configured to measure and report CLI for a serving receive beam. For example, the wireless communication device 102 may measure CLI for a serving receive beam and send an indicator of the CLI to the base station. The base station may utilize the indicator of the CLI measured by the wireless communication device 102 to perform interference management (e.g., to change scheduling, to change uplink-downlink configuration, etc., for one or more wireless communication devices) .

The wireless communication device 102 may measure CLI for one or more non-serving receive beams. In some examples, the wireless communication device 102 may not report the measured CLI corresponding to the non-serving receive beams.

In some examples, the wireless communication device 102 (e.g., processor 110) may determine (e.g., calculate, compute, etc. ) one or more metrics to measure the CLI and/or produce a CLI measurement. Examples of metrics may include a sounding reference signal-reference signal received power (SRS-RSRP) , cross-link interference-received signal strength indicator (CLI-RSSI) , signal-to-noise ratio (SNR) , etc. SRS-RSRP may be a metric that the wireless communication device 102 (e.g., processor 110) may calculate based on a signal sent by an aggressor device. For example, the wireless communication device 102 (e.g., a victim device) may receive (on the configured CLI resource (s) , for instance) and/or may descramble a SRS-RSRP signal sent by an aggressor device. In some approaches, a SRS-RSRP may be measured from a signal and/or single resource element (RE) . A RE may be a unit of frequency domain allocation. The SRS-RSRP may indicate a power contribution (in watts (W) , for example) of a RE (e.g., a signal contribution from a single RE) . For example, the wireless communication device 102 may estimate the SRS-RSRP by converting time domain samples to the frequency domain using a Fourier transform, extracting frequency domain SRS tones to estimate signal power, and normalizing the signal power to determine per-RE signal power. CLI-RSSI may be a metric that the wireless communication device 102 (e.g., processor 110) may calculate based on signal and noise contributions associated with an aggressor device. For example, CLI-RSSI may be calculated as a summation over the victim device receive bandwidth in terms of total power (including signal and noise, for instance) . In some approaches, the CLI-RSSI may characterize the overall contribution of the interference. For instance, the CLI-RSSI may be calculated as a summation from all resource blocks (RBs) over the receive bandwidth of the victim device, including signal power plus noise. In some approaches, the processor 110 may execute the CLI measurement instructions to process a CLI configuration (received from a network and/or base station, for instance) and/or to compute the CLI measurement (e.g., SRS-RSRP and/or CLI-RSSI, etc. ) .

In some approaches, a CLI measurement may be the SRS-RSRP metric, may be the CLI-RSSI metric, may be a SNR metric, or may be a combination (e.g., average, weighted sum, etc. ) of multiple metrics. For example, the wireless communication device 102 (e.g., processor 110) may measure the CLI for a beam by measuring and/or determining the SRS-RSRP metric, the CLI-RSSI metric, and/or a SNR (or any combination thereof, for instance) . In some approaches, each of the CLI measurements in the set of CLI measurements may correspond to a respective receive beam. For example, the set of CLI measurements may include a CLI measurement corresponding to a serving receive beam and CLI measurements corresponding to non-serving receive beams.

The CLI measurements (e.g., set of CLI measurements) and/or metric (s) (e.g., SRS-RSRP, CLI-RSSI, SNR, etc. ) may be stored as measurement data 116 in the memory 104. For example, the measurement data 116 may include a CLI measurement per receive beam. In some approaches, the measurement data 116 may include a table, database, list, array, etc., of a CLI measurement (e.g., SRS-RSRP, CLI-RSSI, and/or SNR, etc. ) for each receive beam (e.g., each receive beam of the wireless communication device 102 for which a CLI measurement has been taken) .

In some configurations, the memory 104 may include beam selection instructions 114. The beam selection instructions 114 may be instructions for selecting a receive beam. For example, the processor 110 may execute the beam selection instructions 114 to determine whether a beam switching criterion is satisfied based on the set of CLI measurements. A beam switching criterion may be one or more conditions for switching a serving receive beam. Examples of the beam switching criterion may include one or more thresholds and/or comparisons between receive beams.

In some approaches, to determine whether the beam switching criterion is satisfied, the processor 110 may be configured to determine whether a CLI measurement corresponding to the serving receive beam satisfies a threshold. For instance, if the CLI measurement (e.g., SRS-RSRP, CLI-RSSI, etc. ) corresponding to a serving receive beam is greater than a threshold (e.g., -90 decibels relative to one milliwatt (dBm) for SRS-RSRP and/or -50 dBm for CLI-RSSI) , the wireless communication device 102 (e.g., processor 110) may determine that the beam switching criterion is satisfied.

In some approaches, to determine whether the beam switching criterion is satisfied, the processor 110 may be configured to determine whether a CLI measurement corresponding to a non-serving receive beam satisfies a threshold. For instance, if the CLI measurement (e.g., SRS-RSRP, CLI-RSSI, etc. ) corresponding to a non-serving receive beam is less than a threshold, the wireless communication device 102 (e.g., processor 110) may determine that the beam switching criterion is satisfied. For example, if a measured SRS-RSRP < -100 dBm and/or if a measured CLI-RSSI < -65 dBm for a non-serving receive beam, the CLI measurement may satisfy a threshold and/or the non-serving receive beam may be selected as the serving receive beam. Other threshold values may be utilized in other examples. SRS-RSRP may have an approximate range of -140 to -70 dBm and/or CLI-RSSI may have an approximate range of -80 to -35 dBm.

In some approaches, to determine whether the beam switching criterion is satisfied, the processor 110 may be configured to determine whether a CLI measurement corresponding to the serving receive beam is greater than a first threshold and a CLI measurement corresponding to a non-serving receive beam is less than a second threshold. In some approaches, to determine whether the beam switching criterion is satisfied, the processor 110 may be configured to determine whether a first CLI measurement corresponding to the serving receive beam is greater than a threshold and whether a second CLI measurement corresponding to a non-serving receive beam is less than the first CLI measurement.

In some approaches, the processor 110 may be configured to determine whether the beam switching criterion is satisfied based on the SRS-RSRP and the CLI-RSSI. For example, to determine whether the beam switching criterion is satisfied, the processor 110 may be configured to determine whether a CLI-RSSI metric corresponding to the serving receive beam satisfies (e.g., is greater than) a first threshold (e.g., -50 dBm) and whether an SRS-RSRP metric corresponding to the serving receive beam satisfies (e.g., is greater than) a second threshold (e.g., -90 dBm) . For instance, if the CLI-RSSI metric is greater than the first threshold and the SRS-RSRP metric is greater than the second threshold, the wireless communication device 102 (e.g., processor 110) may determine that the beam switching criterion is satisfied. In some examples, the first threshold for the CLI-RSSI may be -50 dBm (or another value) and the second for the SRS-RSRP may be -90 dBm (or another value) . An example of a procedure for determining whether the beam switching criterion is satisfied based on SRS-RSRP and CLI-RSSI is given in Listing (1) .

In some approaches, the processor 110 may be configured to determine a serving receive beam by balancing network (e.g., base station) measurements (e.g., TRP, RSSI, and/or RSRP) and CLI measurements (e.g., CLI-RSSI and/or SRS-RSRP) between beams. For example, the processor 110 may evaluate a first receive beam and a second receive beam. If the first receive beam and the second receive beam have similar network measurements (e.g., TRP, RSSI, and/or RSRP within a range) and the second receive beam has a lower CLI measurement (e.g., CLI-RSSI and/or SRS-RSRP) , the processor 110 may determine that the switching criterion is satisfied and/or may switch the serving receive beam to the second receive beam. Other approaches, including combinations of the described approaches, may be utilized in some configurations.

In some configurations, the processor 110 may execute the beam selection instructions 114 to switch a serving receive beam in response to determining that the beam switching criterion is satisfied. For example, the processor 110 may switch the serving receive beam to another receive beam using beamforming and/or by applying a precoding matrix corresponding to the receive beam. For instance, the processor 110 may change the serving receive beam to a different direction and/or to a different width. In some examples, switching the serving receive beam may include changing the serving receive beam to a receive beam that has a minimum CLI measurement in the set of CLI measurements. The receive beam (to which the serving receive beam may be switched) may be referred to as a selected or target receive beam.

In some approaches, the processor 110 may execute the CLI measurement instructions 112 and/or the beam selection instructions 114 to determine a measurement frequency for one or more receive beams. For example, the wireless communication device 102 may determine CLI measurements for different receive beams at different frequencies and/or periodicities. In some approaches, a measurement frequency for a receive beam may be determined based on one or more CLI measurements corresponding to the receive beam and/or a similarity (e.g., proximity) to a serving receive beam.

In some examples, the processor 110 may reduce the measurement frequency for a receive beam that has a CLI measurement that satisfies a threshold. For instance, if a CLI measurement (e.g., SRS-RSRP and/or CLI-RSSI) for a non-serving receive beam is greater than a threshold, the processor 110 may reduce the measurement frequency for that non-serving receive beam. Measurement frequency may be reduced by skipping CLI measurement for a receive beam for one or more measurement cycles (e.g., measurement sweeps) and/or by removing the receive beam from a set of receive beams (e.g., set of candidate beams) for measurement and/or switching.

In some examples, the processor 110 may maintain or increase the measurement frequency for a receive beam that has a CLI measurement that satisfies a threshold. For instance, if a CLI measurement (e.g., SRS-RSRP and/or CLI-RSSI) for a non-serving receive beam is less than or equal to a threshold, the processor 110 may increase the measurement frequency for that non-serving receive beam. Measurement frequency may be increased by adding CLI measurement for a receive beam for one or more measurement cycles (e.g., measurement sweeps) and/or by adding the receive beam to a set of receive beams (e.g., set of candidate beams) for measurement.

In some examples, the processor 110 may determine the measurement frequency for a receive beam based on similarity to a serving receive beam. For instance, if a non-serving receive beam is within an angular range from the serving receive beam and/or is within a neighbor threshold from the serving receive beam, the measurement frequency may be maintained and/or increased. If a non-serving receive beam is not within an angular range from the serving receive beam and/or is not within a neighbor threshold from the serving receive beam, the measurement frequency may be reduced. Measurement frequency may be reduced by skipping CLI measurement for a receive beam for one or more measurement cycles (e.g., measurement sweep) and/or by removing the receive beam from a set of receive beams (e.g., set of candidate beams) for measurement and/or switching.

In some examples, the processor 110 may rank respective receive beams based on the set of CLI measurements. For example, the processor 110 may order the respective receive beams in an ascending or descending order of corresponding CLI measurement. The processor 110 may determine a measurement frequency for at least one of the respective receive beams based on the ranking. For example, receive beams with lower CLI measurements may be assigned increased measurement frequencies, while receive beams with higher CLI measurements may be assigned decreased measurement frequencies. In some examples, the processor 110 may execute the CLI measurement instructions 112 and/or the beam selection instructions 114 to determine how frequently to measure the receive beams (e.g., candidate beams) by ranking the CLI measurements (e.g., CLI-RSSIs and/or SRS-RSRPs) .

In some examples, the wireless communication device 102 (e.g., processor 110) may determine a set of candidate beams. For example, the processor 110 may execute the CLI measurement instructions 112 and/or the beam selection instructions 114 to determine the set of candidate beams. In some approaches, the set of candidate beams may be determined based on CLI measurement, candidate CLI threshold, ranking, neighbor threshold, angular range, etc. For example, the set of candidate beams may include one or more receive beams with CLI measurements that satisfy the candidate CLI threshold, receive beam (s) in a portion (e.g., top percentage, highest positions, etc. ) of the ranking, receive beam (s) within the neighbor threshold (e.g., within a number of discrete angular steps from the serving receive beam) , receive beam (s) within the angular range from the serving receive beam, etc. For instance, the processor 110 may determine and/or provide a set of candidate beams (that may be a subset of all receive beams, for example) for monitoring CLI that are neighbor beams to the serving receive beam. In some approaches, the wireless communication device 102 may perform CLI measurement and/or beam switching within the set of candidate beams (after performing a CLI measurement sweep and/or determining the set of candidate beams, for instance) . For instance, the wireless communication device 102 may perform CLI measurement more frequently for the set of candidate beams than for receive beams that are not in the set of candidate beams. In some approaches, the wireless communication device 102 (e.g., processor 110) may limit CLI measurement and/or beam switching to the set of candidate beams.

In some examples, one or more of the elements illustrated in the wireless communication device 102 and/or processor 110 may be excluded (e.g., not implemented and/or not included) , may be combined, and/or may be divided. For example, the CLI measurement instructions 112 and the beam selection instructions 114 may be combined in some implementations. In some examples, the CLI measurement instructions 112, the beam selection instructions 114, and/or the measurement data 116 may be divided and/or separated into subsets of the instructions and/or data described. In some implementations, the wireless communication device 102 may include multiple processors 110 and/or multiple memories 104, and one or more of the elements described herein may be distributed across multiple processors 110 and/or multiple memories 104. In some implementations, functions described in relation to the CLI measurement instructions 112 and/or the beam selection instructions 114 may be implemented in hardware (e.g., structural circuitry of the processor (s) 110, state machine, etc. ) instead of being expressed as instructions in the memory 104.

In some configurations, the wireless communication device 102 may include one or more elements that are not shown in Figure 1. For example, the wireless communication device 102 may include one or more displays. A display may be a screen or panel for presenting images. In some examples, the display (s) may be implemented with one or more display technologies, such as liquid crystal display (LCD) , light-emitting diode (LED) , organic light-emitting diode (OLED) , plasma, cathode ray tube (CRT) , etc. The display (s) may present content. Examples of content may include one or more interactive controls, graphics, symbols, characters, etc. In some configurations, information, data, and/or images based on CLI measurement (s) and/or beam switching may be presented on the display.

The display (s) may be integrated into the wireless communication device 102 or may be linked to the wireless communication device 102. In some examples, the display (s) may be a monitor with a desktop computer, a display on a laptop, a touch screen on a tablet device, an OLED panel in a smartphone, etc. In another example, the wireless communication device 102 may be a virtual reality headset with integrated displays. In another example, the wireless communication device 102 may be a computer that is coupled to a virtual reality headset with the displays.

In some configurations, the wireless communication device 102 may present a user interface on the display. For example, the user interface may enable a user to interact with the wireless communication device 102. In some configurations, the display may be a touchscreen that receives input from physical touch (by a finger, stylus, or other tool, for example) . Additionally or alternatively, the wireless communication device 102 may include or be coupled to another input interface. For example, the wireless communication device 102 may include a camera and may detect user gestures (e.g., hand gestures, arm gestures, eye tracking, eyelid blink, etc. ) . In another example, the wireless communication device 102 may be linked to a mouse and may detect a mouse click. In another example, the wireless communication device 102 may be linked to a keyboard and may detect keyboard input. In yet another example, the wireless communication device 102 may be linked to one or more other controllers (e.g., game controllers, joy sticks, touch pads, motion sensors, etc. ) and may detect input from the one or more controllers. In some examples, the wireless communication device 102 may utilize input received with the input interface to set and/or adjust one or more parameters for CLI measurement and/or beam selection. For instance, the wireless communication device 102 (e.g., processor 110) may set one or more directions of receive beams, widths of receive beams, thresholds for switching a serving receive beam, a number of receive beams, etc., based on received input.

In some configurations, the wireless communication device 102 may request and/or receive input and/or data from another device. For example, the wireless communication device 102 may receive one or more signals indicating directions of receive beams, widths of receive beams, thresholds for switching a serving receive beam, a number of receive beams, etc. The wireless communication device 102 may utilize the received signal (s) to set and/or adjust one or more parameters for CLI measurement and/or beam selection.

Figure 2 is a flow diagram illustrating one configuration of a method 200 for receive beam control. In some examples, the method 200 may be performed by the wireless communication device 102 described in relation to Figure 1 or by another device. The wireless communication device 102 may measure 202 CLI from respective receive beams to produce a set of CLI measurements. In some examples, measuring 202 the CLI from the respective receive beams may be performed as described in relation to Figure 1. For example, the wireless communication device 102 may determine a SRS-RSRP metric, CLI-RSSI metric, and/or SNR for each of the receive beams. In some approaches, the wireless communication device 102 may measure the CLI for the receive beams using resources indicated by CLI configuration information received from a base station. In some approaches, the wireless communication device 102 may perform a sequence or sweep of CLI measurements over a set of receive beams (e.g., set of candidate beams) .

The wireless communication device 102 may determine 204 whether a beam switching criterion is satisfied. In some examples, determining 204 whether the beam switching criterion is satisfied may be performed as described in relation to Figure 1. For instance, the wireless communication device 102 may compare a CLI measurement or measurements to a threshold or thresholds and/or may compare CLI measurements between receive beams. In an example, the wireless communication device 102 may determine 204 that a beam switching criterion is satisfied in a case that a CLI measurement for a serving receive beam is greater than a threshold and that a CLI measurement for a non-serving receive beam (e.g., a candidate beam) is less than the CLI measurement for the serving receive beam. In another example, the wireless communication device 102 may determine 204 that the beam switching criterion is satisfied in a case that a CLI-RSSI of the serving receive beam is greater than a first threshold and that a SRS-RSRP for the serving receive beam is greater than a second threshold. Other examples of a beam switching criterion or criteria may be utilized in other approaches.

In a case that the beam switching criterion is not satisfied, the wireless communication device 102 may return to measuring 202 the CLI from the respective receive beams. For example, the wireless communication device 102 may repeatedly measure 202 CLI from respective receive beams and/or may return to measuring 202 the CLI after a delay.

In a case that the beam switching criterion is satisfied, the wireless communication device 102 may switch 206 a serving receive beam. For instance, the wireless communication device 102 may switch 206 the serving receive beam in response to determining 204 that the beam switching criterion is satisfied. In some examples, switching 206 the serving receive beam may be performed as described in relation to Figure 1. For instance, the wireless communication device 102 may switch 206 the serving receive beam to a receive beam with a different direction and/or width by adjusting beamforming and/or a precoding matrix. In some approaches, the serving receive beam may be switched 206 to a receive beam with a lesser CLI measurement (e.g., a minimum CLI measurement in a set of receive beams) . In some examples, the wireless communication device 102 may return to measuring 202 CLI from respective receive beams upon switching 206 and/or after a delay.

In some examples, the method 200 may include determining one or more candidate beams. For instance, the wireless communication device 102 may determine the candidate beam (s) as described in relation to Figure 1. For example, the wireless communication device 102 may utilize the CLI measurements, beam switching determination, and/or serving receive beam switch to switch and/or toggle the candidate beam (s) . In some approaches, if the serving receive beam is switched, the candidate beams may be determined as receive beams within an angular range of the serving receive beam with a CLI measurement that is less than a candidate CLI threshold. Other approaches may be utilized, as described in relation to Figure 1.

Figure 3 is a diagram illustrating an example of a transmission and reception schedule 318 of an aggressor device and a transmission and reception schedule 320 of a victim device. In Figure 3, a downlink slot, symbol, and/or subframe is denoted with a “D, ” an uplink slot, symbol, and/or subframe is denoted with a “U, ” and a switching slot, symbol, and/or subframe is denoted with a “S. ” For instance, one or more switching slots may be utilized in a downlink to uplink transition. In the example of Figure 3, the victim device schedule 320 includes downlink slots, symbols, and/or subframes that overlap with uplink slots, symbols, and/or subframes of the aggressor device schedule 318. CLI 322 may occur in the overlapping period. For instance, the wireless communication device 102 described in relation to Figure 1 may have the victim device schedule 320 and may experience CLI 322 in the overlapping period due to uplink transmissions by another wireless communication device with the aggressor device schedule 318.

As described herein, the wireless communication device 102 may measure the CLI 322. For example, the wireless communication device 102 may utilize CLI resources that are configured by the network (e.g., base station) to measure the CLI 322. The wireless communication device 102 may monitor the CLI 322 for a serving receive beam and/or for non-serving receive beams (e.g., in non-serving receive directions) . The wireless communication device 102 may report the CLI measurement for the serving receive beam to the network (e.g., base station) , if configured. In some examples, the CLI measurement (s) may be utilized to select a receive beam. For instance, utilizing the CLI measurement (s) to select a receive beam may improve measurement efficiency and/or reduce or avoid interference on the serving receive beam. In some approaches, the wireless communication device 102 may skip or reduce repeatedly monitoring some receive beams with known CLI conditions. A wireless communication device may accordingly select and/or switch a serving receive beam to reduce the CLI and/or improve signal-to-interference noise ratio (SINR) . A selected or target serving receive beam may be a narrower beam or wider beam over the same or a different direction.

Figure 4 is a diagram illustrating an example of CLI 432. In this example, a base station 424 communicates with devices in a cell 426. For example, an aggressor device 428 and a victim device 430 may communicate with the base station 424. The victim device 430 may be an example of the wireless communication device 102 described in relation to Figure 1. As illustrated in Figure 4, CLI 432 may occur between devices in the same cell 426 in some cases. For example, the aggressor device 428 may perform uplink transmissions to the base station 424 in a time period in which the victim device 430 receives downlink transmissions from the base station 424, which may cause CLI 432 to occur.

In some approaches, the victim device 430 may not know the TDD UL/DL configuration (e.g., slot format) or SRS transmission configuration. For example, the victim device 430 may measure the CLI 432 based on the CLI resource configuration provided by the base station 424. For instance, the victim device 430 may not perform blind CLI detection and measurement before the base station 424 provides the CLI resource configuration. The base station 424 may send the CLI resource configuration to the victim device 430, which may utilize the CLI resource configuration to measure the CLI 432 corresponding to the aggressor device 528.

Figure 5 is a diagram illustrating another example of CLI 532. In this example, base station A 524a communicates with an aggressor device 528 in cell A 526a and base station B 524b communicates with a victim device 530 in cell B 526b. For example, the aggressor device 528 may communicate with base station A 524a and the victim device 530 may communicate with base station B 524b. The aggressor device 528 and the victim device 530 may be situated near respective cell edges and near each other. The victim device 530 may be an example of the wireless communication device 102 described in relation to Figure 1. As illustrated in Figure 5, CLI 532 may occur between devices in different cells 526a–b in some cases. For example, the aggressor device 528 may perform uplink transmissions to base station A 524a in a time period in which the victim device 530 receives downlink transmissions from base station B 524b, which may cause CLI 532 to occur. In some examples, base station A 524a may send a CLI resource configuration of cell A 526a and/or the aggressor device 528 to base station B 524b. For example, the CLI resource configuration may be sent via an inter-cell or inter-node message. Base station B 524b may relay the CLI resource configuration to the victim device 530, which may utilize the CLI resource configuration to measure the CLI 532 corresponding to the aggressor device 528.

Figure 6 is a diagram illustrating an example of a wireless communication device 634 with relatively wide receive beams 636a–c. The wireless communication device 634 may be an example of the wireless communication device 102 described in relation to Figure 1. The wireless communication device 634 may have a capability of selecting among multiple receive beams 636a–c. For example, the wireless communication device 634 may select one of the receive beams 636a–c to improve reception of a total radiated power (TRP) signal in the downlink. In some examples, the wireless communication device 634 may also select a transmit beam (not shown) to improve base station reception of an uplink signal.

The wireless communication device 634 may form multiple receive beams 636a–c. In Figure 6, the receive beams 636a–c are relatively wider beams (e.g., pseudo-omnidirectional (PO) beams) , which may provide relatively less beamforming gain with wider coverage. In some approaches to receive beam selection, the wireless communication device may monitor the receive beams 636a–c and/or directions over time and may switch to a beam when a target receive beam has a stronger measured TRP reference signal strength and/or when the serving receive beam has a weaker measured TRP reference signal strength. In some of the approaches described herein, the wireless communication device 634 may monitor CLI and select one of the receive beams 636a–c based on the measured CLI. In some approaches, a combination of CLI and reference signal strength (e.g., TRP) may be utilized to select one of the receive beams 636a–c. For example, assume that a current serving receive beam A 636a has TRP _A and CLI-RSSI _A, and that a candidate beam B 636b has TRP _B and CLI-RSSI _B. If TRP _A >> TRP _B, and CLI-RSSI _A = CLI-RSSI _B, then receive beam A 636a may be selected (e.g., maintained as the current serving receive beam) . If TRP _A = TRP _B and CLI-RSSI _A << CLI-RSSI _B, then receive beam A 636a may be selected (e.g., maintained as the current serving receive beam) . If TRP _A = TRP _B, and CLI-RSSI _A >>CLI-RSSI _B, then candidate receive beam B 636b may be selected (e.g., the serving receive beam may switch from receive beam A 636a to receive beam B 636b) . If TRP _A << TRP _B, and CLI-RSSI _A << CLI-RSSI _B, then receive beam A 636a may be selected (e.g., maintained as the current serving receive beam) . If TRP _A << TRP _B, and CLI-RSSI _A >> CLI-RSSI _B, then candidate receive beam B 636b may be selected (e.g., the serving receive beam may switch from receive beam A 636a to receive beam B 636b) .

Figure 7 is a diagram illustrating an example of a wireless communication device 734 with relatively narrow receive beams 736a–u. The wireless communication device 734 may be an example of the wireless communication device 102 described in relation to Figure 1. The wireless communication device 734 may have a capability of selecting among multiple receive beams 736a–u. For example, the wireless communication device 734 may select one of the receive beams 736a–u to improve reception of a TRP signal in the downlink. In some examples, the wireless communication device 734 may also select a transmit beam (not shown) to improve base station reception of an uplink signal.

The wireless communication device 734 may form multiple receive beams 736a–u. In Figure 7, the receive beams 736a–u are relatively narrower beams, which may provide relatively greater beamforming gain with less coverage. In some approaches to receive beam selection, the wireless communication device may monitor the receive beams 736a–u and/or directions over time and may switch to a beam when a target receive beam has a stronger measured TRP reference signal strength and/or when the serving receive beam weaker measured TRP reference signal strength. In some of the approaches described herein, the wireless communication device 734 may monitor CLI and select one of the receive beams 736a–u based on the measured CLI. In some approaches, a combination of CLI and reference signal strength (e.g., TRP) may be utilized to select one of the receive beams 736a–u as described in relation to Figure 6.

In some approaches, a wireless communication device may select among a group of wider beams (as shown in Figure 6, for example) and narrower beams (as shown in Figure 7, for example) . In some examples, a wireless communication device may select a wider beam in order to reduce computational complexity and/or power consumption. For example, in a case that a narrow beam and a wider beam each provide a minimum threshold signal strength and/or less than a threshold CLI, the wireless communication device may select the wider beam. Receiving with a wider beam may consume less processing and/or power resources in some cases.

Figure 8 is a diagram illustrating an example of a base station 838, an aggressor device 840, and a victim device 842. The victim device 842 may be an example of the wireless communication device 102 described in relation to Figure 1. The base station 838 may communicate with the aggressor device 840 and the victim device 842. For instance, the victim device 842 may receive signals from the base station 838 using a serving receive beam 844. The victim device 842 may also experience CLI from the aggressor device 840. The victim device 842 may measure the CLI resources sourced from the aggressor device 840. For example, the victim device 842 may record the SRS-RSRP and CLI-RSSI measured with a set of receive beams (e.g., candidate receive beams) .

Some examples of the techniques described herein may perform one or more of the following functions to select a serving receive beam. The victim device 842 may threshold the CLI measurements per receive beam. If the CLI measurement of the serving receive beam 844 becomes larger than a threshold, the victim device 842 may evaluate alternative receive beams with smaller CLI measurements. In some cases, the victim device 842 may select a beam with a different direction that detects less interference. An example of a wider beam with a different direction is given in relation to Figure 9. In some cases, the victim device 842 may select beam with a different width on the same or different receive direction that reduces or avoids interference. An example of a narrower beam with a different direction is given in relation to Figure 10. For receive beams that are impacted by CLI (e.g., that have greater than a threshold CLI measurement) , the victim device 842 may reduce the measurement frequency, which may reduce power consumption and/or may conserve power. If the victim device 842 identifies one or more receive beams with an improved or lower CLI measurement, those receive beam (s) can be scheduled for a greater measurement frequency.

Figure 9 is a diagram illustrating another example of a base station 938, an aggressor device 940, and a victim device 942. The victim device 942 may be an example of the wireless communication device 102 described in relation to Figure 1. In the example of Figure 9, the victim device 942 has switched the serving receive beam 944 to a different direction relative to the example in Figure 8. For instance, the victim device 942 has selected a new serving receive beam in a different direction with a relatively wide beam width. In this example, the victim device reduces CLI from the aggressor device 940 by changing the direction of the serving receive beam 944.

Figure 10 is a diagram illustrating another example of a base station 1038, an aggressor device 1040, and a victim device 1042. The victim device 1042 may be an example of the wireless communication device 102 described in relation to Figure 1. In the example of Figure 10, the victim device 1042 has switched the serving receive beam 1044 to a different direction and has narrowed the beam width relative to the example in Figure 8. For instance, the victim device 1042 has selected a new serving receive beam in a different direction with a relatively narrow beam width. In this example, the victim device reduces CLI from the aggressor device 1040 by changing the direction and narrowing the width of the serving receive beam 1044.

Figure 11 is a flow diagram illustrating another configuration of a method 1100 for receive beam control. In some examples, the method 1100 may be performed by the wireless communication device 102 described in relation to Figure 1 or by another device. The wireless communication device 102 may measure 1102 CLI-RSSI and SRS-RSRP for a receive beam. In some examples, measuring 1102 the CLI-RSSI and the SRS-RSRP for a receive beam may be performed as described in relation to one or more of the Figures herein. For example, the wireless communication device 102 may determine a SRS-RSRP metric and a CLI-RSSI metric for the receive beam.

The wireless communication device 102 may determine 1104 whether the CLI-RSSI corresponding to the receive beam is greater than a first threshold. In some examples, determining 1104 whether the CLI-RSSI is greater than the first threshold may be performed as described in relation to one or more of the Figures herein. For instance, the wireless communication device 102 may compare the CLI-RSSI to a first threshold to determine whether the CLI-RSSI metric is greater than the first threshold.

In a case that the CLI-RSSI is not greater than the first threshold, the wireless communication device 102 may iterate 1114 to a next receive beam based on a measurement frequency. For example, the wireless communication device 102 may proceed to a next receive beam in a set of receive beams (e.g., candidate beams) based on a measurement frequency and may measure 1102 the CLI-RSSI and SRS-RSRP for the next receive beam, etc. For instance, the measurement frequency may indicate whether a receive beam in a set of receive beams is to be skipped or measured. In some examples, the wireless communication device 102 may iterate 1114 to a next receive beam that is not skipped.

In a case that the CLI-RSSI is greater than the first threshold, the wireless communication device 102 may determine 1106 whether the SRS-RSRP corresponding to the receive beam is greater than a second threshold. In some examples, determining 1106 whether the SRS-RSRP is greater than the second threshold may be performed as described in relation to one or more of the Figures herein. For instance, the wireless communication device 102 may determine whether the SRS-RSRP metric is greater than the second threshold in response to determining 1104 that the CLI-RSSI is greater than the first threshold.

In a case that the SRS-RSRP is not greater than the second threshold, the wireless communication device 102 may iterate 1114 to a next receive beam based on a measurement frequency. For example, the wireless communication device 102 may proceed to a next receive beam in a set of receive beams (e.g., candidate beams) and may measure 1102 the CLI-RSSI and SRS-RSRP for the next receive beam, etc., as described above.

In a case that the SRS-RSRP is greater than the second threshold, the wireless communication device 102 may determine 1108 whether the receive beam (e.g., the current receive beam being evaluated) is the serving receive beam. For example, the wireless communication device 102 may determine 1108 whether the receive beam is the serving receive beam in response to determining 1106 that the SRS-RSRP is greater than the second threshold. For instance, the wireless communication device 102 may compare an indicator (e.g., index, direction, etc. ) of the receive beam with an indicator (e.g., index, direction, etc. ) of the serving receive beam. The receive beam may be the serving receive beam in a case that the indicators match and/or in a case that the serving receive beam is set to the receive beam being evaluated.

In a case that the receive beam is not the serving receive beam, the wireless communication device 102 may reduce 1112 a measurement frequency for the receive beam. For example, the wireless communication device 102 may reduce 1112 the measurement frequency in response to determining 1108 that the first receive beam is not the serving receive beam. For instance, the wireless communication device 102 may designate the receive beam to be skipped (e.g., skipped for a number of iterations or sweeps) . In some examples, the wireless communication device 102 may reduce 1112 the measurement frequency for the receive beam by removing the receive beam from a set of candidate beams. The wireless communication device 102 may iterate 1114 to a next receive beam based on a measurement frequency as described above.

In a case that the receive beam is the serving receive beam, the wireless communication device 102 may switch 1110 the serving receive beam. In some examples, switching 1110 the serving receive beam may be performed as described in relation to one or more of the Figures herein. For instance, the wireless communication device 102 may switch 1110 the serving receive beam in response to determining that the receive beam is the serving receive beam. The serving receive beam may be switched to a receive beam with a different direction and/or width by adjusting beamforming and/or a precoding matrix, for example. In some approaches, the serving receive beam may be switched to a receive beam with a lesser CLI-RSSI and/or SRS-RSRP. The wireless communication device 102 may iterate 1114 to a next receive beam based on a measurement frequency as described above.

Figure 12 illustrates certain components that may be included within an electronic device 1202 configured to implement various configurations of the systems and methods disclosed herein. Examples of the electronic device 1202 may include wireless communication devices, base stations, network devices, access points, routers, cellular phones, smartphones, computers (e.g., desktop computers, laptop computers, etc. ) , tablet devices, media players, televisions, vehicles, automobiles, cameras, virtual reality devices (e.g., headsets) , augmented reality devices (e.g., headsets) , mixed reality devices (e.g., headsets) , aircraft, drones, unmanned aerial vehicles (UAVs) , gaming consoles, personal digital assistants (PDAs) , smart appliances, etc. In some examples, the electronic device 1202 may be implemented in accordance with one or more of the electronic devices (e.g., wireless communication device 102, base station) described herein.

The electronic device 1202 includes a processor 1221. The processor 1221 may be a single-or multi-chip microprocessor (e.g., an ARM) , a special purpose microprocessor (e.g., a digital signal processor (DSP) ) , a microcontroller, a programmable gate array, etc. The processor 1221 may be referred to as a central processing unit (CPU) . Although just a single processor 1221 is shown in the electronic device 1202, in an alternative configuration, a combination of processors (e.g., an ARM and DSP) could be implemented.

The electronic device 1202 also includes memory 1201. The memory 1201 may be any electronic component capable of storing electronic information. The memory 1201 may be embodied as random access memory (RAM) , read-only memory (ROM) , magnetic disk storage media, optical storage media, flash memory devices in RAM, on-board memory included with the processor, EPROM memory, EEPROM memory, registers, and so forth, including combinations thereof.

Data 1205a and instructions 1203a may be stored in the memory 1201. The instructions 1203a may be executable by the processor 1221 to implement one or more of the methods, procedures, steps, and/or functions described herein. Executing the instructions 1203a may involve the use of the data 1205a that is stored in the memory 1201. When the processor 1221 executes the instructions 1203, various portions of the instructions 1203b may be loaded onto the processor 1221 and/or various pieces of data 1205b may be loaded onto the processor 1221.

The electronic device 1202 may also include a transmitter 1211 and/or a receiver 1213 to allow transmission and reception of signals to and from the electronic device 1202. The transmitter 1211 and receiver 1213 may be collectively referred to as a transceiver 1215. One or more antennas 1209a-b may be electrically coupled to the transceiver 1215. The electronic device 1202 may also include (not shown) multiple transmitters, multiple receivers, multiple transceivers, and/or additional antennas.

The electronic device 1202 may include a digital signal processor (DSP) 1217. The electronic device 1202 may also include a communication interface 1219. The communication interface 1219 may allow and/or enable one or more kinds of input and/or output. For example, the communication interface 1219 may include one or more ports and/or communication devices for linking other devices to the electronic device 1202. In some configurations, the communication interface 1219 may include the transmitter 1211, the receiver 1213, or both (e.g., the transceiver 1215) . Additionally or alternatively, the communication interface 1219 may include one or more other interfaces (e.g., touchscreen, keypad, keyboard, microphone, camera, etc. ) . For example, the communication interface 1219 may enable a user to interact with the electronic device 1202.

The various components of the electronic device 1202 may be coupled together by one or more buses, which may include a power bus, a control signal bus, a status signal bus, a data bus, etc. For the sake of clarity, the various buses are illustrated in Figure 12 as a bus system 1207.

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

The phrase “based on” does not mean “based only on, ” unless expressly specified otherwise. In other words, the phrase “based on” describes both “based only on” and/or “based at least on. ”

The term “processor” should be interpreted broadly to encompass a processor, a central processing unit (CPU) , a microprocessor, a digital signal processor (DSP) , a controller, a microcontroller, a state machine, and so forth. Under some circumstances, a “processor” may refer to an application specific integrated circuit (ASIC) , a programmable logic device (PLD) , a field programmable gate array (FPGA) , etc. In some examples, the term “processor” may refer to a combination of processing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The term “memory” should be interpreted broadly to encompass any electronic component capable of storing electronic information. The term memory may refer to various types of processor-readable media such as random access memory (RAM) , read-only memory (ROM) , non-volatile random access memory (NVRAM) , programmable read-only memory (PROM) , erasable programmable read-only memory (EPROM) , electrically erasable PROM (EEPROM) , flash memory, magnetic or optical data storage, registers, etc. Memory is said to be in electronic communication with a processor if the processor can read information from and/or write information to the memory. Memory that is integral to a processor is in electronic communication with the processor.

The terms “instructions” and “code” should be interpreted broadly to include any type of computer-readable statement (s) . For example, the terms “instructions” and “code” may refer to one or more programs, routines, sub-routines, functions, procedures, etc. “Instructions” and “code” may comprise a single computer-readable statement or many computer-readable statements.

The functions described herein may be implemented in software or firmware being executed by hardware. The functions may be stored as one or more instructions on a computer-readable medium. The terms “computer-readable medium” or “computer-program product” refer to any tangible storage medium that can be accessed by a computer or a processor. By way of example, and not limitation, a computer-readable medium may comprise RAM, ROM, EEPROM, compact disc read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Disk and disc, as used herein, includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and

disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. It should be noted that a computer-readable medium may be tangible and non-transitory. The term “computer-program product” refers to a computing device or processor in combination with code or instructions (e.g., a “program” ) that may be executed, processed, or computed by the computing device or processor. As used herein, the term “code” may refer to software, instructions, code, or data that is/are executable by a computing device or processor.

Software or instructions may also be transmitted over a transmission 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 transmission medium.

The methods disclosed herein comprise one or more steps or actions for achieving the described method. The method steps and/or actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is required for proper operation of the method that is being described, the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims. It should also be noted that one or more steps and/or actions may be added to the method (s) and/or omitted from the method (s) in some configurations of the systems and methods disclosed herein. In some configurations, one or more elements of a method described herein may be combined with one or more elements of another method described herein.

Further, it should be appreciated that modules and/or other appropriate means for performing the methods and techniques described herein, can be downloaded, and/or otherwise obtained by a device. For example, a device may be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, various methods described herein can be provided via a storage means (e.g., random access memory (RAM) , read-only memory (ROM) , a physical storage medium such as a compact disc (CD) or floppy disk, etc. ) , such that a device may obtain the various methods upon coupling or providing the storage means to the device.

As used herein, the term “and/or” should be interpreted to mean one or more items. For example, the phrase “A, B, and/or C” should be interpreted to mean any of: only A, only B, only C, A and B (but not C) , B and C (but not A) , A and C (but not B) , or all of A, B, and C. As used herein, the phrase “at least one of” should be interpreted to mean one or more items. For example, the phrase “at least one of A, B, and C” or the phrase “at least one of A, B, or C” should be interpreted to mean any of: only A, only B, only C, A and B (but not C) , B and C (but not A) , A and C (but not B) , or all of A, B, and C. As used herein, the phrase “one or more of” should be interpreted to mean one or more items. For example, the phrase “one or more of A, B, and C” or the phrase “one or more of A, B, or C” should be interpreted to mean any of: only A, only B, only C, A and B (but not C) , B and C (but not A) , A and C (but not B) , or all of A, B, and C.

It is to be understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes, and variations may be made in the arrangement, operation, and details of the systems, methods, and electronic device described herein without departing from the scope of the claims. For example, one or more functions or operations of the techniques described herein may be reordered.

Claims

A wireless communication device, comprising:

a memory;

a processor in electronic communication with the memory, wherein the processor is configured to:

measure cross-link interference (CLI) for respective receive beams to produce a set of CLI measurements;

determine whether a beam switching criterion is satisfied based on the set of CLI measurements; and

switch a serving receive beam in response to determining that the beam switching criterion is satisfied.
The wireless communication device of claim 1, wherein to determine whether the beam switching criterion is satisfied, the processor is configured to determine whether a first CLI measurement corresponding to the serving receive beam satisfies a first threshold.
The wireless communication device of claim 2, wherein to determine whether the beam switching criterion is satisfied, the processor is configured to determine whether a second CLI measurement corresponding to a non-serving receive beam satisfies a second threshold.
The wireless communication device of claim 1, wherein to measure the CLI for the respective receive beams, the processor is configured to measure the CLI for non-serving receive beams.
The wireless communication device of claim 1, wherein to measure the CLI, the processor is configured to measure at least one of a sounding reference signal-reference signal received power (SRS-RSRP) or a cross-link interference-received signal strength indicator (CLI-RSSI) .
The wireless communication device of claim 5, wherein the processor is configured to determine whether the beam switching criterion is satisfied based on the SRS-RSRP and the CLI-RSSI.
The wireless communication device of claim 6, wherein to determine whether the beam switching criterion is satisfied, the processor is configured to:

determine whether a first CLI-RSSI corresponding to a first receive beam is greater than a first threshold;

determine whether a first SRS-RSRP corresponding to the first receive beam is greater than a second threshold in response to determining that the first CLI-RSSI is greater than the first threshold; and

determine whether the first receive beam is the serving receive beam in response to determining that the first SRS-RSRP is greater than the second threshold.
The wireless communication device of claim 7, wherein the processor is to switch the serving receive beam in response to determining that the first receive beam is the serving receive beam.
The wireless communication device of claim 7, wherein the processor is further configured to reduce a measurement frequency for the first receive beam in response to determining that the first receive beam is not the serving receive beam.
The wireless communication device of claim 1, wherein the processor is further configured to:

rank the respective receive beams based on the set of CLI measurements; and

determine a measurement frequency for at least one of the respective receive beams based on the ranking.
A method performed by a wireless communication device, comprising:

measuring cross-link interference (CLI) for respective receive beams to produce a set of CLI measurements;

determining whether a beam switching criterion is satisfied based on the set of CLI measurements; and

switching a serving receive beam in response to determining that the beam switching criterion is satisfied.
The method of claim 11, wherein determining whether the beam switching criterion is satisfied comprises determining whether a first CLI measurement corresponding to the serving receive beam satisfies a first threshold.
The method of claim 12, wherein determining whether the beam switching criterion is satisfied comprises determining whether a second CLI measurement corresponding to a non-serving receive beam satisfies a second threshold.
The method of claim 11, wherein measuring the CLI for the respective receive beams comprises measuring the CLI for non-serving receive beams.
The method of claim 11, wherein measuring the CLI comprises measuring at least one of a sounding reference signal-reference signal received power (SRS-RSRP) or a cross-link interference-received signal strength indicator (CLI-RSSI) .
The method of claim 15, wherein determining whether the beam switching criterion is satisfied is based on the SRS-RSRP and the CLI-RSSI.
The method of claim 16, wherein determining whether the beam switching criterion is satisfied comprises:

determining whether a first CLI-RSSI corresponding to a first receive beam is greater than a first threshold;

determining whether a first SRS-RSRP corresponding to the first receive beam is greater than a second threshold in response to determining that the first CLI-RSSI is greater than the first threshold; and

determining whether the first receive beam is the serving receive beam in response to determining that the first SRS-RSRP is greater than the second threshold.
The method of claim 17, wherein the serving receive beam is switched in response to determining that the first receive beam is the serving receive beam.
The method of claim 17, further comprising reducing a measurement frequency for the first receive beam in response to determining that the first receive beam is not the serving receive beam.
The method of claim 11, further comprising:

ranking the respective receive beams based on the set of CLI measurements; and

determining a measurement frequency for at least one of the respective receive beams based on the ranking.
A non-transitory tangible computer-readable medium storing computer-executable code, comprising:

code for causing a processor to measure cross-link interference (CLI) for respective receive beams to produce a set of CLI measurements;

code for causing the processor to determine whether a beam switching criterion is satisfied based on the set of CLI measurements; and

code for causing the processor to switch a serving receive beam in response to determining that the beam switching criterion is satisfied.
The computer-readable medium of claim 21, wherein the code for causing the processor to determine whether the beam switching criterion is satisfied comprises code for causing the processor to determine whether a first CLI measurement corresponding to the serving receive beam satisfies a first threshold.
The computer-readable medium of claim 21, wherein the code for causing the processor to measure the CLI for the respective receive beams comprises code for causing the processor to measure the CLI for non-serving receive beams.
The computer-readable medium of claim 21, wherein the code for causing the processor to measure the CLI comprises code for causing the processor to measure at least one of a sounding reference signal-reference signal received power (SRS-RSRP) or a cross-link interference-received signal strength indicator (CLI-RSSI) .
The computer-readable medium of claim 21, further comprising:

code for causing the processor to rank the respective receive beams based on the set of CLI measurements; and

code for causing the processor to determine a measurement frequency for at least one of the respective receive beams based on the ranking.
An apparatus, comprising:

means for measuring cross-link interference (CLI) for respective receive beams to produce a set of CLI measurements;

means for determining whether a beam switching criterion is satisfied based on the set of CLI measurements; and

means for switching a serving receive beam in response to determining that the beam switching criterion is satisfied.
The apparatus of claim 26, wherein the means for determining whether the beam switching criterion is satisfied comprises means for determining whether a first CLI measurement corresponding to the serving receive beam satisfies a first threshold.
The apparatus of claim 26, wherein the means for measuring the CLI for the respective receive beams comprises means for measuring the CLI for non-serving receive beams.
The apparatus of claim 26, wherein the means for measuring the CLI comprises means for measuring at least one of a sounding reference signal-reference signal received power (SRS-RSRP) or a cross-link interference-received signal strength indicator (CLI-RSSI) .
The apparatus of claim 26, further comprising:

means for ranking the respective receive beams based on the set of CLI measurements; and

means for determining a measurement frequency for at least one of the respective receive beams based on the ranking.