Interference power control for sidelink communications

Abstract

Methods, systems, and devices for wireless communication are described. In general, the described techniques provide a first transmission to be received from a first device at a second device. The second device may determine one or more interference parameters (e.g., a maximum allowable interference power) for receiving the first transmission from the first device, and the second device may transmit an indication of the one or more interference parameters using a full duplex operation (e.g., using a resource overlapping the resource for receiving the first transmission). The third device may receive an indication of one or more interference parameters, and determine a transmission parameter (e.g., maximum transmit power) for communicating with the fourth device based on the one or more interference parameters. The third device may transmit the second transmission to the fourth device based on the transmission parameter.

Description

[0001] This application is a divisional application of the Chinese invention patent application with application date of July 16, 2020 and application number 202080062722.3. Technical Field

[0002] The following relates to wireless communications, including interference power control for sidelink communications. Background Art

[0003] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may employ various technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread OFDM (DFT-S-OFDM). A wireless multiple access communication system may include several base stations or network access nodes, each of which simultaneously supports communication for multiple communication devices, which may be referred to as user equipment (UE).

[0004] In some wireless communication systems, a UE may be able to simultaneously use at least partially overlapping time and frequency resources to send traffic to another UE while receiving traffic from a third UE. This ability to communicate in two directions using at least partially overlapping time and frequency resources may be referred to as full-duplex capability. However, in some cases, a UE may be prevented from detecting a transmission from another UE, which may cause interference at the corresponding receiving UE. Effective techniques for managing such interference may be needed to help enhance system performance and reliability. Summary of the invention

[0005] The described technology relates to an improved method, system, device or apparatus for supporting interference power control for sidelink communications. In general, the described technology provides a user equipment (UE) that receives a first transmission from a first device (e.g., another UE) using a first set of wireless resources (e.g., time-frequency resources). In some cases, the UE may determine one or more interference parameters for receiving the first transmission from the first device, wherein the one or more interference parameters may be associated with a second transmission from a third device (e.g., a third UE) to a fourth device (e.g., a fourth UE) using a second set of wireless resources. An interference parameter may include, for example, one or more of the following: a maximum allowable interference power, an interference power adjustment, or resources (e.g., time-frequency resources) that the UE can use to receive the first transmission from the first device.

[0006] The UE may send (e.g., broadcast) an indication of the determined interference parameters (e.g., when receiving a transmission from the first device), which may include full-duplex operation using a third set of wireless resources that at least partially overlaps with the first set of wireless resources in the time domain. The third device (i.e., the third UE) may use the third set of wireless resources to receive an indication of one or more interference parameters. The third UE may determine a transmission parameter for communicating with the fourth device based on the one or more received interference parameters. For example, the third UE may determine a maximum transmit power for sending a second transmission to the fourth device based on the received interference parameters. Based on the transmission parameters, the third UE may send a second transmission to the fourth device.

[0007] A method of wireless communication is described. The method may include receiving, at a second device, a first transmission from a first device using a first set of wireless resources, determining one or more interference parameters for receiving the first transmission from the first device, the one or more interference parameters associated with a second transmission from a third device to a fourth device using a second set of wireless resources, and sending an indication of the one or more interference parameters using a third set of wireless resources.

[0008] An apparatus for wireless communication is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to receive a first transmission from a first device at a second device using a first set of wireless resources, determine one or more interference parameters for receiving the first transmission from the first device, the one or more interference parameters associated with a second transmission from a third device to a fourth device using a second set of wireless resources, and send an indication of the one or more interference parameters using a third set of wireless resources.

[0009] Another apparatus for wireless communication is described. The apparatus may include means for receiving, at a second device, a first transmission from a first device using a first set of wireless resources, determining one or more interference parameters for receiving the first transmission from the first device, the one or more interference parameters associated with a second transmission from a third device to a fourth device using a second set of wireless resources, and sending an indication of the one or more interference parameters using a third set of wireless resources.

[0010] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to: receive, at a second device, a first transmission from a first device using a first set of wireless resources, determine one or more interference parameters for receiving the first transmission from the first device, the one or more interference parameters associated with a second transmission from a third device to a fourth device using a second set of wireless resources, and send an indication of the one or more interference parameters using a third set of wireless resources.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of one or more interference parameters may include operations, features, components, or instructions for sending the indication in full-duplex operation using a third set of wireless resources that at least partially overlaps with the first set of wireless resources in the time domain.

[0012] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for broadcasting an indication of one or more interference parameters.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of one or more interference parameters may include operations, features, components, or instructions for sending an indication of one or more interference parameters to a third device, and the second set of wireless resources at least partially overlaps with the first set of wireless resources.

[0014] In some examples of methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of one or more interference parameters may include operations, features, components, or instructions for periodically sending an indication of one or more interference parameters in a set of transmission time intervals.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of one or more interference parameters may include operations, features, components, or instructions for sending one or more reference signals (e.g., one or more modulated reference signals).

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more reference signals may include one or more synchronization signals.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of one or more interference parameters may include operations, features, components, or instructions for sending a sequence set corresponding to the one or more interference parameters.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more interference parameters may include a maximum interference power for receiving a first transmission from a first device using a first set of wireless resources.

[0019] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a maximum interference power based on a received signal power value and a target channel quality for communicating with the first device.

[0020] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, an indication of one or more interference parameters may be transmitted as a function of a transmit power parameter for transmissions to a third device.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more interference parameters may include an interference power adjustment for receiving transmissions from the first device.

[0022] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a current interference level for communicating with the first device, and determining an interference power adjustment based on comparing the current interference level to an interference threshold.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the interference power adjustment may indicate a reduction in a maximum transmit power for a second transmission from the third device to the fourth device, the interference power adjustment based on a current interference level exceeding an interference threshold.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the interference power adjustment indicates an increase in a maximum transmit power for a second transmission from the third device to the fourth device, the interference power adjustment being based on a current interference level not exceeding an interference threshold.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of one or more interference parameters may include an indication of a time domain resource set for the first set of radio resources.

[0026] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of one or more interference parameters may include an indication of a frequency-domain resource set for the first set of wireless resources.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a frequency-domain resource set for a first set of wireless resources may be indicated by a frequency location at which the indication may be sent.

[0028] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the third set of wireless resources at least partially overlaps in frequency with the first set of wireless resources.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the third set of wireless resources may overlap with the first set of wireless resources for a complete time duration of the third set of wireless resources.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating between the first device and the second device may include sidelink communications.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of one or more interference parameters to a third device may include a sidelink communication.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the transmission from the third device to the fourth device may include sidelink communications.

[0033] A method for wireless communication is described. The method may include receiving an indication of one or more interference parameters for receiving a first transmission from a first device using a first wireless resource set at a second device, the indication being received at a third device from the second device via a third wireless resource set; determining transmission parameters for communicating with a fourth device using a second wireless resource set based on the one or more interference parameters received from the second device, the second wireless resource set at least partially overlapping the first wireless resource set; and communicating with the fourth device using the second wireless resource set based on the transmission parameters.

[0034] An apparatus for wireless communication is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to receive an indication of one or more interference parameters for receiving a first transmission from a first device using a first wireless resource set at a second device, the indication being received from the second device at a third device via a third wireless resource set; determine, based on the one or more interference parameters received from the second device, transmission parameters for communicating with a fourth device using a second wireless resource set, the second wireless resource set at least partially overlapping the first wireless resource set; and communicate with the fourth device using the second wireless resource set based on the transmission parameters.

[0035] Another apparatus for wireless communication is described. The apparatus may include components for: receiving an indication of one or more interference parameters for receiving a first transmission from a first device using a first wireless resource set at a second device, the indication being received at a third device from the second device via a third wireless resource set; determining transmission parameters for communicating with a fourth device using a second wireless resource set based on the one or more interference parameters received from the second device, the second wireless resource set at least partially overlapping the first wireless resource set; and communicating with the fourth device using the second wireless resource set based on the transmission parameters.

[0036] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to: receive an indication of one or more interference parameters for receiving a first transmission from a first device using a first wireless resource set at a second device, the indication received at a third device from the second device via a third wireless resource set; determine transmission parameters for communicating with a fourth device using a second wireless resource set based on the one or more interference parameters received from the second device, the second wireless resource set at least partially overlapping the first wireless resource set; and communicate with the fourth device using the second wireless resource set based on the transmission parameters.

[0037] In some examples of methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of one or more interference parameters may include operations, features, components, or instructions for periodically receiving an indication of one or more interference parameters in a set of transmission time intervals.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with the fourth device may include operations, features, components, or instructions for sending one or more transmissions to the fourth device using the second set of wireless resources.

[0039] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a third set of wireless resources for receiving an indication of one or more interference parameters may at least partially overlap in the time domain with a first set of wireless resources used by the second device to receive a first transmission from the first device.

[0040] In some examples of methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of one or more interference parameters may include operations, features, components, or instructions for receiving one or more reference signals for the one or more interference parameters.

[0041] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more reference signals may include one or more synchronization signals.

[0042] In some examples of methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of one or more interference parameters may include operations, features, components, or instructions for receiving a sequence set corresponding to the one or more interference parameters.

[0043] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more interference parameters may include a maximum interference power for a second device to receive a first transmission from a first device using a first set of wireless resources.

[0044] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a signal quality metric for communicating with a second device, and determining a maximum transmit power for communicating with a fourth device based on the signal quality metric and a maximum interference power.

[0045] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining a signal quality metric may include operations, features, components, or instructions for measuring a path loss of a signal received from the second device.

[0046] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, measuring path loss may include operations, features, components, or instructions for measuring a received power of a transmission received from a second device, and determining the path loss based on the received power and a transmit power parameter for the transmission from the second device.

[0047] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more interference parameters may include an interference power adjustment to a maximum interference power at which the second device receives transmissions from the first device.

[0048] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a maximum transmit power for communicating with a fourth device based on the interference power adjustment.

[0049] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining a maximum transmit power for communicating with a fourth device may include operations, features, components, or instructions for increasing the maximum transmit power based on an increase in the interference power adjustment indicating the maximum interference power.

[0050] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining a maximum transmit power for communicating with a fourth device may include operations, features, components, or instructions for reducing the maximum transmit power based on an interference power adjustment indicating a reduction in the maximum interference power.

[0051] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of one or more interference parameters may include an indication of a frequency-domain resource set for the first set of wireless resources.

[0052] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of one or more interference parameters may include an indication of a frequency-domain resource set for the first set of wireless resources.

[0053] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a frequency-domain resource set for a first set of wireless resources may be indicated by a frequency location at which an indication of the frequency-domain resource set may be received.

[0054] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with a fourth device may include operations, features, components, or instructions for sending a second transmission to the fourth device during a time domain resource set according to a maximum transmit power, and sending a third transmission to the fourth device outside the time domain resource set according to the maximum transmit power.

[0055] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with a fourth device may include operations, features, components, or instructions for sending a second transmission to the fourth device during a time domain resource set according to a maximum transmit power, and sending a third transmission to the fourth device outside the time domain resource set using a transmit power exceeding the maximum transmit power.

[0056] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a signal quality metric based on transmission parameters for communicating with a fourth device, comparing the signal quality metric to a signal quality threshold, and determining whether the transmission parameters are sufficient for further communication with the fourth device based on the comparison.

[0057] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with a fourth device may include operations, features, components, or instructions for determining, based on a signal quality metric exceeding a signal quality threshold, that a transmission parameter is sufficient for further communication with the fourth device, and performing further communication with the fourth device based on determining that the transmission parameter is sufficient.

[0058] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with a fourth device may include operations, features, components, or instructions for determining, based on a signal quality metric not exceeding a signal quality threshold, that a transmission parameter is insufficient for further communication with the fourth device, and determining, based on determining that the transmission parameter is insufficient, one or more additional resource sets for communicating with the fourth device.

[0059] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with a fourth device may include operations, features, components, or instructions for communicating with the fourth device according to a maximum transmit power during a configured time domain resource set based on transmission parameters, and communicating with the first device according to the maximum transmit power outside the configured time domain resource set.

[0060] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with a fourth device may include operations, features, components, or instructions for communicating with the fourth device according to a maximum transmit power during a configured time domain resource set based on transmission parameters, and communicating with the first device using a transmit power exceeding the maximum transmit power outside the configured time domain resource set.

[0061] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the first transmission from the first device by the second device may include sidelink communication.

[0062] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of one or more interference parameters may include operations, features, components, or instructions for sidelink communication.

[0063] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating with a fourth device may include operations, features, components, or instructions for sidelink communication.

[0064] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of one or more interference parameters from a second device via a third set of wireless resources and communicating with a fourth device using the second set of wireless resources may include operations, features, components, or instructions for full-duplex operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 An example of a wireless communication system supporting interference power control for sidelink communications in accordance with aspects of the present disclosure is described.

[0066] Figure 2 An example of a wireless communication system supporting interference power control for sidelink communications in accordance with aspects of the present disclosure is described.

[0067] Figure 3 An example of a transmission timeline supporting interference power control for sidelink communications in accordance with aspects of the present disclosure is illustrated.

[0068] Figure 4 An example of a process flow to support interference power control for sidelink communications in accordance with aspects of the present disclosure is described.

[0069] Figure 5 and Figure 6 A block diagram is shown of a device supporting interference power control for sidelink communications in accordance with aspects of the present disclosure.

[0070] Figure 7 A block diagram of a communication manager supporting interference power control for sidelink communications is shown in accordance with aspects of the present disclosure.

[0071] Figure 8 A diagram of a system including a device supporting interference power control for sidelink communications in accordance with aspects of the present disclosure is shown.

[0072] Fig. 9 and Fig.10 A flow chart illustrating a method of supporting interference power control for sidelink communications in accordance with aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0073] In some wireless communication systems (e.g., next generation wireless networks, fifth generation (5G) communication systems, new radio (NR) communication systems, etc.), it is expected that ultra-high data rates and a wide range of application scenarios will be supported. Therefore, wireless full-duplex communication is an emerging technology and can increase (e.g., double) the link capacity that can accommodate ultra-high data rates and a wide range of application scenarios. Wireless full-duplex can include enabling radio network nodes to simultaneously transmit and receive on the same frequency band and at the same time slot (i.e., using overlapping sets of time and frequency resources). Full-duplex communication devices (such as base stations or user equipment (UE)) can simultaneously send and receive communications with other devices. It is expected that by doubling the capacity of each single link, full-duplex communication can increase the communication system throughput in various applications in wireless communication networks while also reducing transmission delays for time-sensitive services.

[0074] In some cases, the first full-duplex UE may be subject to cross interference caused by side link transmissions between other UEs using resources overlapping with the resources used by the first UE. In order to avoid or mitigate this type of interference, the second UE (e.g., the transmitter UE) can monitor the transmission before transmitting so as not to cause interference by transmitting on the same resource set that has been used for other parallel transmissions. If the second UE senses a transmission (e.g., a transmission sent by the first UE), the second UE can determine not to transmit or to use different resources to transmit. However, in some cases, an obstacle may be located between the first UE and the second UE. In this case, the second UE may not detect the transmission from the first UE. Therefore, the second UE may use the same resource set as the first UE to transmit, which may cause interference between the two transmissions.

[0075] A technique for mitigating interference in this case may include: the receiving UE (e.g., a UE receiving a transmission from a first UE, a full-duplex UE) sends a signal to mute transmissions from other devices while receiving transmissions from the first UE. The device (such as a second UE) receiving the signal can accordingly determine not to use these resources to send transmissions. However, although this technique can reduce interference to these transmissions, it can provide relatively inefficient utilization of resources by muting potentially interfering transmissions. For example, instead of muting these transmissions, different side link communication applications may have different interference power requirements, and therefore in some cases, different side link communications can coexist using the same set of resources. For example, the allowable interference level may vary based on the received signal power of the transmission received at the first UE, the interference cancellation capability of the first UE, and other similar parameters or combinations thereof. Therefore, in some cases, absolute muting of potentially interfering transmissions may be relatively inefficient utilization of spectrum resources.

[0076] Provided herein are techniques by which a receiving UE (e.g., a UE for receiving one or more first side link transmissions from a first UE) can configure and signal one or more interference parameters, such as a maximum transmit power (or, alternatively, a maximum transmission power), during communication between the first UE and the receiving UE so that other nearby devices can communicate over the same resources. For example, the receiving UE can send (e.g., broadcast) one or more interference notification signals, which can include a transmission when receiving a first side link transmission from the first UE. Other nearby devices can receive the interference notification signal and use the information contained in the interference notification signal to configure transmission parameters for sending additional side link transmissions. For example, the interference notification signal can include information indicating one or more of the following: a maximum allowable interference power, an interference power adjustment, or resources (e.g., time domain resources) that the receiving UE can use to receive the first side link transmission from the first UE. Based on the information included in the interference notification signal, the second UE can determine a transmission parameter (e.g., a maximum transmit power) to utilize the transmission parameter to send an additional side link transmission to another UE using resources that at least partially overlap with the resources (e.g., in the time domain, in the frequency domain) used by the first UE to send the first side link transmission to the receiving UE.

[0077] Various aspects of the disclosure are first described in the context of a wireless communication system. Various aspects of the disclosure are then described in the context of a wireless communication system, a transmission timeline, and a process flow. Various aspects of the disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow charts related to interference power control for sidelink communications.

[0078] Figure 1 An example of a wireless communication system 100 that supports interference power control for sidelink communications in accordance with various aspects of the present disclosure is described. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some cases, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, or communications with low-cost and low-complexity devices.

[0079] The base station 105 may communicate wirelessly with the UE 115 via one or more base station antennas. The base station 105 described herein may include or may be referred to by those skilled 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 (any of which may be referred to as a gNB), a home NodeB, a home eNodeB, or some other suitable term. The wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). The UE 115 described herein may be able to communicate with various types of base stations 105 and network equipment (including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.).

[0080] Each base station 105 may be associated with a particular geographic coverage area 110 in which it supports communications with various UEs 115. Each base station 105 may provide communications coverage for the respective geographic coverage area 110 via a communications link 125, and the communications link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communications link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

[0081] The geographic coverage area 110 of the base station 105 may be divided into sectors that constitute a portion of the geographic coverage area 110, and each sector may be associated with a cell. For example, each base station 105 may provide communication coverage for a macro cell, a small cell, a hotspot, or other types of cells, or various combinations thereof. In some examples, the base station 105 may be mobile and therefore provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE / LTE-A / LTE-A Pro or NR network, in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

[0082] The term "cell" refers to a logical communication entity used to communicate with a base station 105 (e.g., on a carrier), and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID)) to distinguish between adjacent cells operating via the same or different carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types that may provide access to different types of devices (e.g., machine type communication (MTC), narrowband Internet of Things (NB-IoT), enhanced mobile broadband (eMBB), or other). In some cases, the term "cell" may refer to a portion of a geographic coverage area 110 (e.g., a sector) on which the logical entity operates.

[0083] Each UE 115 can be dispersed throughout the wireless communication system 100, and each UE 115 can be stationary or mobile. UE 115 can also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, wherein "device" can also be referred to as a unit, a station, a terminal, or a client. UE 115 can also be a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 can also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, etc., which can be implemented in various items (such as electrical appliances, vehicles, meters, etc.).

[0084] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that integrate sensors or meters to measure or capture information and relay the information to a central server or application, which may utilize the information or present the information to a person interacting with the program or application. Some UEs 115 may be designed to collect information or implement automated behavior of machines. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, wild life monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0085] Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power saving techniques for UE 115 include entering a power saving "deep sleep" mode when not engaged in active communications, or operating on a limited bandwidth (e.g., in accordance with narrowband communications). In some cases, UE 115 may be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communications for these functions.

[0086] In some cases, UE 115 may also be able to communicate directly with other UE 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol). One or more UEs in a group of UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in this group may be outside the geographic coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some cases, each group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group. In some cases, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0087] The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 via a backhaul link 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130) on a backhaul link 134 (e.g., via X2, Xn, or other interfaces).

[0088] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management of UEs 115 served by base stations 105 associated with the EPC. User IP packets may be delivered via the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation and other functions. The P-GW may be connected to a network operator IP service. Operator IP services may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet switched (PS) streaming service.

[0089] At least some network devices (such as base stations 105) may include subcomponents, such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with each UE 115 through a number of other access network transport entities, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or merged into a single network device (e.g., base station 105).

[0090] The wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region of 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band, because the wavelengths are in the range of from about 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by buildings and environmental features. However, these waves can fully penetrate various structures for macro cells to provide services to UEs 115 located indoors. Compared to transmissions using lower frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz, transmissions using UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0091] The wireless communication system 100 may also operate in the Super High Frequency (SHF) region using a frequency band from 3 GHz to 30 GHz, also known as the centimeter band. The SHF region includes frequency bands that may be opportunistically used by devices that may be able to tolerate interference from other users, such as the 5 GHz Industrial, Scientific, and Medical (ISM) band.

[0092] The wireless communication system 100 may also operate in the extremely high frequency (EHF) region of the spectrum (e.g., from 30Ghz to 300GHz), which is also referred to as the millimeter band. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be even smaller and more closely spaced than the UHF antennas. In some cases, this may facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0093] In some cases, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as a 5 GHz ISM band). When operating in an unlicensed radio frequency spectrum band, wireless devices (such as base stations 105 and UE 115) may employ a listen-before-talk (LBT) procedure to ensure that the frequency channel is clear before sending data. In some cases, operations in unlicensed bands may be based on carrier aggregation configurations (e.g., LAA) in coordination with component carriers operating in licensed bands. Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of the two.

[0094] In some examples, the base station 105 or the UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a sender device (e.g., the base station 105) and a receiver device (e.g., the UE 115), wherein the sender device is equipped with multiple antennas and the receiver device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to increase spectral efficiency by sending or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, the sender device may send multiple signals via different antennas or different antenna combinations. Similarly, the receiver device may receive multiple signals via different antennas or different antenna combinations. 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. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0095] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a sending device or a receiving device (e.g., a base station 105 or a UE 115) to shape or direct an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the sending device and the receiving device. Beamforming can be achieved by combining signals conveyed via antenna elements of an antenna array so that signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the sending device or the receiving device applying a specific amplitude and phase shift to the signal carried via each antenna element associated with the device. The adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the sending device or the receiving device, or relative to some other orientation).

[0096] In one example, the base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with the UE 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the base station 105 in different directions, which may include a signal being sent according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by the base station 105 or a receiving device, such as the UE 115) to identify a beam direction used by the base station 105 for subsequent transmission and / or reception.

[0097] Some signals, such as data signals associated with a particular receiving device, may be sent by base station 105 in a single beam direction (e.g., a direction associated with a receiving device, such as UE 115). In some examples, a beam direction associated with transmissions along a single beam direction may be determined based at least in part on signals sent in different beam directions. For example, UE 115 may receive one or more signals sent by base station 105 in different directions, and UE 115 may report to base station 105 an indication of the signals received by it with the highest signal quality or other acceptable signal quality. Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may use similar techniques for sending signals multiple times in different directions (e.g., for identifying a beam direction used by UE 115 for subsequent transmission or reception) or for sending signals in a single direction (e.g., for sending data to a receiving device).

[0098] A receiving device (e.g., UE 115, which may be an example of a mmW receiving device) may attempt multiple receive beams when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiving device may attempt multiple receive directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, or 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 beams or receive directions. In some examples, the receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal). The single receive beam may be aligned on a beam direction determined at least in part based on listening according to different receive beam directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio, or other acceptable signal quality based at least in part on listening according to multiple beam directions).

[0099] In some cases, the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays that 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 cases, the antennas or antenna arrays associated with a base station 105 may be located at different geographic locations. A base station 105 may have an antenna array having several rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

[0100] In some cases, the wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer can be based on IP. The radio link control (RLC) layer can perform packet segmentation and reassembly to communicate on the logical channel. The media access control (MAC) layer can perform priority handling and multiplex logical channels to transport channels. The MAC layer can also use hybrid automatic repeat request (HARQ) to provide retransmission of the MAC layer, thereby improving link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration and maintenance of the RRC connection of the radio bearer supporting user plane data between the UE 115 and the base station 105 or the core network 130. At the physical layer, the transport channel can be mapped to the physical channel.

[0101] In some cases, UE 115 and base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique that increases the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput of the MAC layer in poor radio conditions (e.g., signal-to-noise ratio conditions). In some cases, a wireless device may support simultaneous slot HARQ feedback, where the device may provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In other cases, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0102] The time interval in LTE or NR can be expressed in terms of a basic time unit (which may refer to, for example, a sampling period T s =1 / 30,720,000 seconds). The time intervals of the communication resources may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be expressed as T f=307,200Ts. A radio frame may be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots, each slot having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the minimum scheduling unit of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI) or in a selected component carrier using sTTI).

[0103] In some wireless communication systems, a time slot may be further divided into a plurality of mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot or a mini-slot may be a minimum scheduling unit. For example, each symbol may vary in duration depending on the subcarrier spacing or the operating frequency band. Further, some wireless communication systems may implement time slot aggregation, where multiple time slots or mini-slots are aggregated together and used for communication between UE 115 and base station 105.

[0104] The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications on the communication link 125. For example, a carrier of the communication link 125 may include a portion of a radio frequency spectrum band that operates according to a physical layer channel for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a predefined frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by a UE 115. A carrier may be downlink or uplink (e.g., in FDD mode), or configured to carry downlink communications and uplink communications (e.g., in TDD mode). In some examples, a signal waveform sent on a carrier may include multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)).

[0105] The organization structure of the carrier may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR). For example, communications on a carrier may be organized according to TTIs or time slots, each of which may include user data and control information or signaling to support decoding of the user data. A carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling to coordinate carrier operations. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling to coordinate the operations of other carriers.

[0106] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. In some examples, control information sent in a physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).

[0107] 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 the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several predetermined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 may be configured to operate on part or all of the carrier bandwidth. In other examples, some UEs 115 may be configured to operate using a narrowband protocol type associated with a predefined portion or range (e.g., a set of subcarriers or RBs) within a carrier (e.g., an "in-band" deployment of a narrowband protocol type).

[0108] In a system using MCM technology, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. In a MIMO system, wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and space resources (e.g., space layers), and the use of multiple space layers may further increase the data rate of communication with UE 115.

[0109] A device (e.g., base station 105 or UE 115) of wireless communication system 100 may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, wireless communication system 100 may include base stations 105 and / or UEs 115 that support simultaneous communication via carriers associated with more than one different carrier bandwidths.

[0110] The wireless communication system 100 may support communication with the UE 115 on multiple cells or carriers, a feature that may be referred to as carrier aggregation or multi-carrier operation. The UE 115 may 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 FDD and TDD component carriers.

[0111] In some cases, the wireless communication system 100 may utilize an enhanced component carrier (eCC). An eCC may be characterized by one or more features including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC may also be configured to be used in an unlicensed spectrum or a shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be utilized by a UE 115 that is not capable of monitoring the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0112] In some cases, an eCC may utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to the symbol duration of other component carriers. A shorter symbol duration may be associated with an increased spacing between adjacent subcarriers. A device utilizing an eCC (such as a UE 115 or a base station 105) may transmit a wideband signal (e.g., according to a frequency channel or carrier bandwidth of 20, 40, 60, 80 MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may include one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable.

[0113] The wireless communication system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, etc. The flexibility of eCC symbol duration and subcarrier spacing may allow eCC to be used across multiple spectrums. In some examples, NR shared spectrum may improve spectrum utilization and spectrum efficiency, particularly through dynamic vertical (e.g., across frequency domain) and horizontal (e.g., across time domain) sharing of resources.

[0114] In some wireless communication systems (e.g., next generation wireless networks, 5G networks, NR, etc.), it is expected that ultra-high data rates and a wide range of application scenarios will be supported. Wireless full-duplex communication is an emerging technology that can increase (e.g., double) the link capacity that can accommodate ultra-high data rates and a wide range of application scenarios. Wireless full-duplex can include enabling radio network nodes to simultaneously transmit and receive on the same frequency band and at the same time slot (i.e., using overlapping sets of time and frequency resources). This simultaneous communication using the same frequency band at the same time can be contrasted with conventional operations (e.g., half-duplex operations, non-full-duplex operations, etc.) in which transmission and reception are different in time and / or frequency. A full-duplex network node (such as a base station 105 in a cellular network) can communicate simultaneously with two half-duplex terminals (e.g., half-duplex UE 115) using the same radio resources (e.g., the same time-frequency resources) in the uplink and downlink. In another implementation, a relay node (e.g., an IAB node) can communicate with an anchor node (e.g., an IAB parent node) and a child node (e.g., a UE 115 or an IAB child node) simultaneously in a one-hop scenario, or communicate with two other relay nodes in a multi-hop scenario. It is expected that full-duplex communication can increase communication system throughput in various applications in a wireless communication network by doubling the capacity of each single link, while also reducing transmission delays for time-sensitive services.

[0115] In some cases, UE 115 can be full-duplex capable, wherein UE 115 can use at least partially overlapping time-frequency resources to simultaneously send to another device (e.g., the second UE 115) and receive other transmissions from another device (e.g., the third UE). In some cases, this full-duplex UE 115 may be subject to self-interference from concurrent uplink communication and downlink communication. In order to mitigate the self-interference caused by this full-duplex communication, UE 115 can perform interference cancellation process (e.g., to eliminate strong self-interference). That is, UE 115 can use one or more interference cancellation techniques to suppress self-interference. For example, UE 115 can mitigate self-interference by beamforming, analog cancellation, digital cancellation, or antenna cancellation or its various combinations.

[0116] In some cases, the first UE 115 (e.g., a full-duplex UE) may be subject to cross-interference caused by transmissions (e.g., side links or other transmissions) between other UEs 115 that use resources that overlap with the resources used by the first UE 115, and the techniques for mitigating self-interference may not be able to cope with the cross-interference. In some cases, to avoid or mitigate this type of interference, the second UE 115 (e.g., a transmitter UE 115) may listen to the transmission before transmitting so as not to cause interference by transmitting on the same set of resources that have been used for other parallel transmissions. If the second UE 115 senses a transmission (e.g., a transmission sent by the first UE 115), the second UE 115 may determine not to transmit or to transmit using different resources.

[0117] However, in some cases, an obstacle may be located between the first device 115 and the second device 115. In this case, the second UE 115 may not detect the transmission from the first UE 115. Therefore, the second UE 115 may use the same set of resources as the first UE 115 for transmission, which may cause interference between the two transmissions. One technique to mitigate interference in this case may include the receiving UE 115 (e.g., a UE 115 for receiving transmissions from the first UE 115, a full-duplex UE) being configured to send a signal to mute transmissions from other devices when receiving transmissions from the first UE 115. The device (e.g., the second device 115) that receives the signal may accordingly determine not to use these resources to send transmissions.

[0118] However, while this technique can reduce interference to these transmissions, it can provide a relatively inefficient use of resources by muting potentially interfering transmissions. For example, instead of muting these transmissions, different sidelink communication applications may have different interference power requirements, and thus in some cases, different sidelink communications may coexist using the same set of resources. For example, the allowable interference level may vary based on one or more of the received signal power of the transmission received from the first UE 115, the interference cancellation capability of the receiving UE 115, and other similar parameters. Therefore, in some cases, absolute muting of potentially interfering transmissions may be a relatively inefficient use of spectrum resources.

[0119] Techniques are provided herein by which a receiving UE 115 (e.g., a UE 115 for receiving one or more first sidelink transmissions from a first UE 115) can configure and signal one or more interference parameters, such as a maximum transmit power (or, alternatively, a maximum transmission power), for communication between the first UE 115 and the receiving UE 115 so that other nearby devices can communicate over the same resources. For example, (e.g., when receiving a first sidelink transmission from the first UE 115) the receiving UE 115 can send (e.g., broadcast) one or more interference notification signals so that other nearby devices can receive the interference notification signals and use the information contained in the interference notification signals to configure transmission parameters for sending additional sidelink transmissions. For example, the interference notification signal can include information indicating one or more of the following: a maximum allowable interference power, an interference power adjustment, or resources (e.g., time domain resources) that the receiving UE 115 can use to receive the first sidelink transmission from the first UE 115. Based on the information included in the interference notification signal, the second UE 115 can determine to utilize transmission parameters (e.g., maximum transmit power) to utilize the transmission parameters to send additional side link transmissions to another UE 115 using resources that at least partially overlap with the resources used by the first UE 115 to send the first side link transmission to the receiving UE 115.

[0120] Figure 2 An example of a wireless communication system 200 that supports interference power control for sidelink communications according to aspects of the present invention is described. In some examples, the wireless communication system 200 may be implemented as described in reference Figure 1 Various aspects of the wireless communication system 100 are described. Figure 2 In the example of FIG. 1 , the wireless communication system 200 may include multiple UEs 115, which may be reference Figure 1 An example of a UE 115 is depicted. The UEs 115 may communicate with each other using respective sidelink channels 205, for example, via respective directional (eg, beamforming) transmissions.

[0121] In some examples, the sidelink channel 205 may correspond to a radio interface between two UEs 115 that may not require assistance from the network (e.g., a proximity service interface such as a PC5 or a vehicle-to-everything (V2X) interface). As described herein, the sidelink channel 205 may be a directional link between one UE 115 and another UE 115, for example, a directional link formed using beamforming techniques (such as using mmW communication). Figure 2As shown in the illustrative example, a first UE 115-a can communicate with a second UE 115-b via a first side link channel 205-a, and a third UE 115-c can communicate with a fourth UE 115-d via a second side link channel 205-b.

[0122] In some cases, such as reference Figure 1 As described, UE 115 (e.g., UE 115-b) may be full-duplex capable, wherein UE 115-b is capable of simultaneously transmitting to another device (e.g., UE 115-c) and receiving other transmissions from another device (e.g., UE 115-a) using at least partially overlapping time-frequency resources. In some cases, wireless resources (e.g., time, frequency, and / or spatial resources) for sidelink communications may be configured according to different modes. For example, in a first mode (e.g., “Mode 1”), a base station may send an indication to a UE 115 (e.g., UE 115-a) of resources scheduled for sidelink communications with another UE 115 (e.g., UE 115-b). Additionally or alternatively, in a second mode (e.g., “Mode 2”), UE 115 (e.g., UE 115-a) may determine sidelink resources to be used by UE 115 for sidelink communications (e.g., with UE 115-b) from a preconfigured set of resources or resources that have been configured, for example, based on previous signaling from a base station or other network device.

[0123] In some cases, UE 115 may experience self-interference from these concurrent uplink and downlink communications. In order to mitigate the self-interference caused by such full-duplex communications, UE 115-b may perform an interference cancellation process (e.g., to eliminate strong self-interference). That is, UE 115-b may use one or more interference cancellation techniques to suppress self-interference. For example, UE 115-b may mitigate self-interference through beamforming, analog cancellation, digital cancellation, or antenna cancellation, or various combinations thereof.

[0124] In some cases, UE 115 may also experience cross-interference caused by transmissions (e.g., sidelink transmissions) between other UEs 115, and techniques for mitigating self-interference may not be able to cope with the cross-interference. For example, after being allocated or determining resources (e.g., for sidelink communications), UE 115-a may send one or more first sidelink transmissions 210 to UE 115-b using a first sidelink channel 205-a (e.g., based on the allocated or determined resources), and UE 115-c may similarly send one or more second sidelink transmissions 215 to UE 115-d using a second sidelink channel 205-b. In some cases, the first sidelink transmissions 210 and the second sidelink transmissions 215 may use partially or completely overlapping sets of resources (e.g., in frequency and time), and may therefore cause interference at neighboring UEs 115 receiving these communications. For example, UE 115-b may receive a first sidelink transmission 210 from UE 115-a, but sending a second sidelink transmission 215 to UE 115-d may interfere with successfully receiving the first sidelink transmission 210 at UE 115-b (e.g., resulting in incorrect decoding of a certain amount of bits of the first sidelink transmission 210). Similarly, UE 115-d may receive a second sidelink transmission 215 from UE 115-c, but sending the first sidelink transmission 210 to UE 115-b may interfere with successfully receiving the second sidelink transmission 215 at UE 115-d.

[0125] In some cases, to avoid or mitigate this type of interference, the transmitting UE 115 or a lower priority UE 115 may listen to the transmission before transmitting so as not to cause interference by transmitting on the same set of resources already used for other concurrent transmissions. Figure 2, communications between UE 115-a and UE 115-b may be associated with a first service priority, and communications between UE 115-c and UE 115-d may be associated with a second service priority, the second service priority being a priority equal to or lower than the first service priority. UE 115-a may first send a first side link transmission 210 to UE 115-b on a set of resources, and UE 115-c may be configured to send a second side link transmission 215 to UE 115-d using the same set of resources (or, for example, an overlapping set of resources). UE 115-c may first listen to these resources (e.g., perform an energy sensing process) before sending the second side link transmission 215 to UE 115-d. If UE 115-c senses a first side link transmission 210 sent by UE 115-a, UE 115-c may determine not to send a second side link transmission 215, or may determine to send the second side link transmission 215 using different resources.

[0126] However, in some cases, such as Figure 2 As shown in the illustrative example of , an obstacle 220 (e.g., a physical obstruction such as a wall, a machine, a moving vehicle, etc.) may be located between UE 115-a and UE 115-c. In this case, UE 115-c may not detect the first side link transmission 210 sent from UE 115-a. Based on UE 115-c not detecting the first side link transmission 210, UE 115-c may determine that the same resources are available for transmission, and UE 115-c may accordingly send a second side link transmission 215 to UE 115-d on the same resources. In some cases, because the first side link transmission 210 and the second side link transmission 215 are sent on the same set of resources (e.g., overlapping time and frequency resources), the second side link transmission 215 may interfere with receiving the first side link transmission 210 at UE 115-b, where the first side link transmission 210 may be a higher priority communication than the second side link transmission 215.

[0127] When UE 115 (e.g., UE 115-b) supports full-duplex communication, some techniques for mitigating interference can be used in this case. For example, a full-duplex UE 115-b can send a signal to mute transmissions from other devices while concurrently receiving transmissions from UE 115-a, where the sent signal and the received transmission use the resource set (e.g., use the same frequency resources). Accordingly, a device (such as UE 115-c) that receives the signal can identify that other communications in its vicinity are using these resources, and UE 115-c will not use these resources to communicate with UE 115-d. In this way, UE 115-b can continue to receive transmissions from UE 115-a while notifying other devices to avoid interfering with the received transmissions without knowing whether other devices are in its vicinity.

[0128] However, although the technology can reduce the interference to the transmission using the first side link channel 205-a, it can provide a relatively inefficient utilization of resources by muting the potential interference transmission. For example, instead of muting these transmissions, different side link communication applications can have different interference power requirements, and therefore in some cases, different side link communications can coexist using the same resource set. For example, the permissible interference level can be based on the received signal power of the transmission received at UE 115-b, the interference cancellation capability of UE 115-b, or other similar parameters or combinations thereof. For example, if the distance between UE 115-a and UE 115-b is relatively short, the received signal power can be relatively large, and the permissible received interference power level can be relatively large accordingly (for example, compared with the relatively large distance between UE 115-a and UE 115-b). Similarly, if UE 115-b is equipped with an antenna with cancellation capability, such as some multi-antenna implementations, UE 115-b can eliminate higher levels of interference, and therefore the permissible received interference power level can also be relatively large. Thus, in some cases, absolute muting of UE 115 - c ’s transmissions on the second sidelink channel 205 - b may be a relatively inefficient use of spectral resources.

[0129] Techniques are provided herein by which a UE 115-b may configure and signal one or more interference parameters, such as a maximum transmit power (or, alternatively, a maximum transmission power), during communications between a UE 115-a and a UE 115-b so that other nearby devices may communicate on the same resources. For example, a full-duplex UE 115-b may send (e.g., broadcast) one or more interference notification signals 225, which may or may not include transmissions concurrent with receiving a first side link transmission 210 from UE 115-a (e.g., using the same time resources in full-duplex operation). In such examples, other nearby devices (such as UE 115-c) may receive one or more of the interference notification signals 225 (e.g., interference notification signal 225-a) and use the information contained in the interference notification signal 225 to configure transmission parameters for sending a second side link transmission 215. For example, the interference notification signal 225 may include information indicating a maximum allowable interference power, an interference power adjustment, or resources that UE 115-b may use to receive the first side link transmission 210 from UE 115-a, or any combination thereof. Upon receiving one or more interference notification signals 225, and based on the information included in the interference notification signal 225, UE 115-c may determine transmission parameters, such as a maximum transmit power, with which to send a second side link transmission 215 to UE 115-d (e.g., over an existing communication link, such as side link channel 205-b). UE 115-c may then send the first side link transmission 210 to UE 115-d based on the determined transmission parameters.

[0130] In some cases, according to the techniques described herein, UE 115-b may determine the maximum amount of interference that it may experience so that UE 115-b can successfully receive transmissions (e.g., one or more first sidelink transmissions 210) from UE 115-a. For example ... rx,B and a target channel quality metric (e.g., signal to interference plus noise ratio (SINR)) γ to calculate the maximum allowable interference power P i,max The received signal power P rx,B The maximum permissible interference power is calculated by subtracting SINRγ from the value of

[0131] P i,max =P rx,B -γ (1)

[0132] In some cases, UE 115-b may send (eg, broadcast) in interference notification signal 225 a signal for maximum allowable interference power P i,maxThe interference notification signal 225 may include, for example, in a field or subfield for a maximum allowable interference power parameter (e.g., in addition to or in lieu of a sequence corresponding to the value, and other signaling techniques described herein) an indication of the maximum allowable interference power P. i,max In some cases, UE 115-b may adjust the interference power P i,max t to control the interference power, i.e., the maximum interference level that UE 115-b may experience when successfully receiving first side link transmission 210 (e.g., such that UE 115-b may decode information bits of first side link transmission 210 at or above a target success rate threshold). For example, UE 115-b may increase interference power P i,max to indicate an increase in the maximum interference power, or UE 115-b may reduce the interference power P i,max to indicate a reduction in the maximum interference power.

[0133] Figure 3 An example of a transmission timeline 300 that supports interference power control for sidelink communications in accordance with aspects of the present disclosure is illustrated. In some aspects, the transmission timeline 300 may be implemented as described with reference to Figure 1 and Figure 2 The transmission timeline 300 is illustrated as representing frequency domain resources along the y-axis and time domain resources along the x-axis. The transmission timeline 300 may include instructions executed to transmit a signal to a UE 115 (such as a reference signal). Figure 2 Operations of implementing communications at a UE 115-b) are described. Example transmission timeline 300 may illustrate an example of resource allocation for transmissions at a UE 115-b on a physical sidelink shared channel (PSSCH).

[0134] The example transmission timeline 300 shows a total receive bandwidth 305 for the PSSCH. The example transmission timeline 300 also shows a transmit bandwidth 310 within which the UE 115-b may transmit interference notification signaling corresponding to a signal received at the UE 115-b. As shown by the example transmission timeline 300, the frequency resources of the transmit bandwidth 310 may completely overlap with the frequency resources used for the receive bandwidth 305. In other cases, the frequency resources of the transmit bandwidth 310 may partially overlap with the frequency resources used for the receive bandwidth 305, or the frequency resources of the transmit bandwidth 310 may not overlap with the frequency resources used for the receive bandwidth 305.

[0135] The example transmission timeline 300 shows periodic time resources allocated for transmitting reference signals 315 (e.g., synchronization signals (SS), demodulation reference signals (DMRS), etc.) and data portions 320. The resource location for each data portion 320 may start at the end of the resources for each reference signal 315, and the resource location for each reference signal 315 may start at the end of the resources for each data portion 320. In this way, the UE 115-b may transmit periodic reference signals 315 and data portions 320 for the entire duration of the time resource, and the UE 115-b may send a transmission to declare resource occupancy for the full duration of the resource. The reference signal 315 and the data portion 320 may be periodic (i.e., defined by some period) and have a minimum timing granularity of one transmission time interval (TTI), which may be, for example, one symbol.

[0136] Reference again Figure 2 In some cases, the interference notification signal 225 including one or more interference parameters (eg, maximum transmit power) may be similar to the interference notification signal 225 of FIG. Figure 3 The reference signal (e.g., SS, DMRS, etc.) described in the embodiment of the present invention may be associated with a reference signal (e.g., SS, DMRS, etc.) described in the embodiment of the present invention. In some cases, the reference signal may be sent using the same set of quasi-co-location (QCL) information. The QCL information may indicate that these different signals may have a QCL relationship (e.g., the antenna ports used to send these signals may share one or more characteristics, such as one or more spatial characteristics). Subsequently, the UE 115-b may send an interference notification signal 225 together with the reference signal. Upon receiving the reference signal based on the QCL information, the receiving UE (e.g., UE 115-c) may demodulate and decode the data portion to obtain one or more interference parameters.

[0137] Additionally or alternatively, UE 115-b may send one or more sequences (e.g., in a sequence set), wherein a sequence may correspond to a particular value or set of values. By corresponding the sequence to the interference parameter, UE 115-b may send interference notification signal 225 with a certain amount of repetitions, which may increase the likelihood that interference notification signal 225 is received and information included in interference notification signal 225 is correctly transmitted. In some cases, the sequence set may include multiple sequences, wherein each sequence in the sequence set may correspond to a value (or multiple values) of one or more of the maximum allowable interference power parameters. Additionally or alternatively, each sequence in the sequence set may correspond to a value (or multiple values) of the interference power adjustment parameter. Further additionally or alternatively, each sequence in the sequence set may correspond to a value (or multiple values) for one or more resource allocation parameters (e.g., corresponding to a corresponding value for a time domain resource length).

[0138] In some cases, the UE 115-c may send the second side link transmission 215 to the UE 115-d based on a transmission parameter (e.g., a determined maximum transmit power) determined at least in part based on the received interference notification signal 225. In some cases, the UE 115-c may send the second side link transmission 215 using frequency domain resources that are based on a frequency band or sub-band (having a size or bandwidth equal to, e.g., a configured size parameter for the frequency band or sub-band) within which the UE 115-c receives one or more interference notification signals 225. For example, the UE 115-c may determine that the UE 115-c will send the second side link transmission 215 at a frequency location in the sub-band that covers (e.g., overlaps) the frequency location at which the UE 115-c receives the interference notification signal 225. In some cases, the UE 115-c may send the second side link transmission 215 using a time domain resource location that is based on the time domain resource location at which the UE 115-c receives the interference notification signal 225. For example, the UE 115 - c may determine to send the second sidelink transmission 215 using a set of time-domain resources having a configured length starting from a time at which the UE 115 - c receives the interference notification signal 225 .

[0139] UE 115-c may receive a transmission of an interference notification signal 225, such as interference notification signal 225-a, from UE 115-b. Based on the information included in interference notification signal 225-a, UE 115-c may determine one or more transmission parameters used to send a second sidelink transmission 215 to UE 115-d using sidelink channel 205-b. For example, interference notification signal 225-a may include an indication of the maximum allowable interference power P i,max The UE 115-c may receive information (e.g., a parameter or a parameter set) regarding the value of the maximum allowable interference power P. i,max The value of is used to determine the maximum transmit power for sending the second side link transmission 215 to UE 115-d.

[0140] In some examples, upon receiving a signal indicating a maximum allowable interference power P i,max After receiving the interference notification signal 225-a from UE 115-b, UE 115-c may measure a signal quality metric (e.g., path loss) of the interference notification signal 225-a received from UE 115-b (and / or other signals received from UE 115-b, e.g., reference signals). For example, UE 115-c may measure a received signal power P of the interference notification signal 225-a received from UE 115-b. rx,C, and calculates a path loss metric corresponding to the communication between UE 115-b and UE 115-c. Path loss PL C2B The path loss for communication from UE 115-c to UE 115-b may be determined by the transmit power P used by UE 115-b to transmit the interference notification signal 225a. tx,B The received signal power P of the interference notification signal 225-a is subtracted from rx,C To calculate the path loss PL C2B Can be equal to PL B2C (i.e., the path loss for communications from UE 115-b to UE 115-c), because the path loss may be substantially the same in either communication direction, with substantially the same signal quality characteristics in either direction. The transmit power P used by UE 115-b to transmit the interference notification signal 225-a tx,B It may be configured and provided to UE 115-c in advance (e.g., according to a set rule), or may have been indicated to UE 115-c in other ways (e.g., by UE 115-b, by a base station, or by another network device). Therefore, the path loss PL may be calculated according to the following equation: C2B :

[0141] PL C2B =PL B2C =P tx,B -P rx,C (2)

[0142] Based on the maximum allowable interference power P received from UE 115-b in interference notification signal 225-a i,max The value of and the determined path loss PL for the associated C2B , UE 115-c may calculate the maximum transmit power P for transmission at UE 115-c. tx,C,max For example, the maximum transmission power P tx,X,max A maximum transmit power may be set that UE 115-c may use to transmit a second sidelink transmission 215 to UE 115-d using resources (e.g., frequency and / or time resources) associated with or indicated by interference notification signal 225-a. UE 115-c may determine the path loss PL by applying the determined maximum transmit power to UE 115-d according to the following equation: C2B The value of the received maximum permissible interference power P i,max The value of (for example, from the received signal power P rx,C Subtract SINR from the maximum transmit power P tx,C,max :

[0143] P tx,C,max=P i,max +PL C2B (3)

[0144] Additionally or alternatively, in accordance with the techniques described herein, UE 115-b may determine a value for an interference power adjustment based on an amount of interference experienced by UE 115-b when receiving a first side link transmission 210 from UE 115-a. For example, UE 115-b may be configured with a threshold for the amount of interference (e.g., 110 decibels (dB)) based on which UE 115-b may determine to signal an interference power adjustment (the threshold being associated, for example, with the spatial relationship of UE 115, the device capabilities of UE 115-b, etc.). For example, UE 115-b may measure the amount of interference experienced (e.g., based on the receive power and transmit power calculations described herein) and compare the measured interference to the threshold. For example, if the interference measured by UE 115-b exceeds the threshold, UE 115-b may signal a negative value to UE 115-c indicating that UE 115-c will reduce its maximum transmit power. Alternatively, for example, if the interference measured by UE 115-b does not exceed the threshold (e.g., by some margin), UE 115-b may signal a positive value to UE 115-c to indicate that UE 115-c may increase its maximum transmit power.

[0145] UE 115-b may transmit (e.g., broadcast) the determined value for the interference power adjustment in interference notification signal 225. Interference notification signal 225 may include information indicating the interference power adjustment, for example, in a field or subfield for an interference power adjustment parameter (e.g., in addition to or in lieu of a sequence corresponding to the value, as well as other signaling techniques described herein).

[0146] As described herein, UE 115-c may receive interference notification signal 225-a and, accordingly, determine one or more transmission parameters for transmitting a second sidelink transmission 215 to UE 115-d using sidelink channel 205-b. For example, interference notification signal 225-a may include information (e.g., a parameter or a set of parameters) indicating a value for an interference power adjustment. UE 115-c may then adjust its maximum transmit power for transmitting to UE 115-d based on the received value for the interference power adjustment. For example, if the interference power adjustment value indicates a positive value, UE 115-c may increase its maximum transmit power based on the indicated value, and if the interference power adjustment value indicates a negative value, UE 115-c may decrease its maximum transmit power based on the indicated value.

[0147] Additionally or alternatively, the interference notification signal 225 may include information indicating one or more resource allocation parameters (e.g., corresponding to corresponding values ​​of the time domain resource lengths). For example, the interference notification signal 225 may include one or more fields or subfields of resource allocation parameters (e.g., in addition to or in lieu of a sequence corresponding to the values, and other signaling techniques described herein). For example, the one or more resource allocation parameters may indicate a set of time domain resources over which UE 115-b will receive one or more first side link transmissions 210 from UE 115-a and over which UE 115-b may correspondingly send overlapping interference notification signals (e.g., by indicating a starting point and an ending point, a starting point and a duration, a timestamp and a remaining duration, etc., or any combination thereof).

[0148] UE 115-c may receive the interference notification signal 225-a including the one or more resource allocation parameters and accordingly determine one or more transmission parameters to use to send a second side link transmission 215 to UE 115-d using the side link channel 205b. For example, UE 115-c may determine a set of time domain resources having a length (i.e., duration) configured according to the one or more resource allocation parameters (e.g., according to a time domain resource length parameter indicating that an effective time domain resource length is equal to the time domain resources for which UE 115-a transmits to UE 115-b and UE 115-b accordingly sends the interference notification signal 225) for sending the second side link transmission 215. Alternatively, in some cases, the interference notification signal 225 may not provide an indication of the time domain resources, in which case UE 115-c may use a time domain resource length according to previously configured or managed parameters.

[0149] UE 115-c may determine a maximum transmit power for these time domain resources (e.g., based on the techniques described herein, or based on a configured or controlled value), and UE 115-c may transmit signals (e.g., one or more second side link transmissions 215) using the time domain resources and the determined maximum transmit power. After these time domain resources end, UE 115-c may transmit additional side link transmissions to UE 115-d using the second side link channel 205b. In this case, because the time domain resources indicate that UE 115-a is no longer transmitting to UE 115-b, UE 115-c may not limit its transmit power. Therefore, UE 115-c may send these additional side link transmissions to UE 115-d using a maximum transmit power that may exceed the previously determined maximum transmit power (as needed, and subject to general and other maximum transmit power constraints).

[0150] In some cases, after determining the maximum transmit power and the time domain resources, UE 115-c may determine whether the maximum transmit power is large enough to effectively communicate during these time-frequency resources. UE 115-c may determine a signal quality metric (e.g., SINR) for the second side link transmission 215 as received at UE 115-d. For example, UE 115-d may provide feedback to UE 115-c indicating the received power for the second side link transmission 215. Alternatively, other signal quality feedback methods may be used, such as an acknowledgement (ACK) or negative acknowledgement (NACK), ARQ, etc.

[0151] UE 115-c may be configured with a threshold for a signal quality metric based on which UE 115-c may determine whether the signal quality is sufficient for communication with UE 115-d (the threshold being associated, for example, with the spatial relationship of UE 115, the device capabilities of UE 115-d, etc.).

[0152] UE 115-c may compare the signal quality metric to a threshold and determine whether the link with UE 115-d is of sufficient quality to send a second side link transmission 215 (or similarly for other types of feedback). For example, if the signal quality metric indicated by UE 115-d exceeds the threshold, UE 115-c may determine that the link is of sufficient quality and UE 115-c may continue to transmit to UE 115-d according to the maximum transmit power and time domain resources indicated by interference notification signal 225-a. Alternatively, for example, if the signal quality metric indicated by UE 115-d does not exceed the threshold, UE 115-c may determine that the link is not of sufficient quality.

[0153] In this case, UE 115-c may monitor other frequency domain resources to locate other time-frequency resources that may be used to transmit to UE 115-d (e.g., by performing an energy sensing process, etc.). Once UE 115-c has located available resources that UE 115-c may use to transmit with a maximum transmit power sufficient for its given signal quality requirements, UE 115-c may transmit to UE 115-d accordingly.

[0154] Figure 4 An example of a process flow 400 for supporting interference power control for sidelink communications in accordance with aspects of the present disclosure is illustrated. In some examples, the process flow 400 may be performed by referring to Figure 1 and Figure 2 The process flow 400 may include UE 115-e, UE 115-f, UE 115-g, and UE 115-h, which may be as described in reference to Figure 1 and Figure 2 The example of the UE described. One or more UEs 115 may support full-duplex communication. In some cases, the transmission between the corresponding UEs 115 may be an example of sidelink communication. The following alternative examples may be implemented, in which some steps are performed in a different order than described or not performed at all. In some cases, the steps may include additional features not mentioned below, or additional steps may be added.

[0155] At 405 , UE 115 - e may send a first transmission to UE 115 - f using the first set of wireless resources, and UE 115 - f may receive the first transmission from UE 115 - e using the first set of wireless resources. UE 115 - e may continue to transmit to UE 115 - f for a time duration 408 .

[0156] At 410, UE 115-f may determine one or more interference parameters for receiving a first transmission from UE 115-e, the one or more interference parameters associated with a second transmission from UE 115-g to UE 115-h using a second set of radio resources. In some cases, UE 115-f may determine a maximum interference power based on a received signal power value and a target channel quality for communicating with UE 115-e.

[0157] In some cases, UE 115-f may determine a current interference level for communications with UE 115-e and determine an interference power adjustment based on comparing the current interference level to an interference threshold. In some cases, the interference power adjustment may indicate a decrease in maximum transmit power for a second transmission from UE 115-g to UE 115-h (e.g., based on the current interference level exceeding the interference threshold). In some cases, the interference power adjustment may indicate an increase in maximum transmit power for a second transmission from UE 115-g to UE 115-h (e.g., based on the current interference level not exceeding the interference threshold).

[0158] At 415, UE 115-f may send an indication of one or more interference parameters to UE 115-g using the third set of radio resources, and UE 115-g may receive an indication of one or more interference parameters from UE 115-f using the third set of radio resources. In some examples, the transmission of 415 may include full-duplex operation using a third set of radio resources that at least partially overlaps with the first set of radio resources in the time domain (e.g., concurrently sending the indication of 415 and receiving the first transmission of 405). In other examples, the transmission of 415 may not include full-duplex transmission (e.g., sending the indication of 415 during a transmission or reception gap of the first transmission of 405, sending the indication of 415 before receiving at least a portion of the first transmission of 405, which may include interference parameters determined before at least a portion of the transmission of 405, or interference parameters that are not determined based on the first transmission of 405 or determined based on a different transmission). UE 115-f may continue to transmit to UE 115-g for a time duration 418 (e.g., corresponding to time duration 408). In some cases, UE 115-f may broadcast an indication of one or more interference parameters.

[0159] In some cases, sending an indication of one or more interference parameters may include sending an indication of the one or more interference parameters to UE 115-g, and the second set of radio resources may at least partially overlap with the first set of radio resources. In some cases, sending an indication of the one or more interference parameters may include periodically sending an indication of the one or more interference parameters in a plurality of transmission time intervals.

[0160] In some cases, sending an indication of one or more interference parameters may include sending one or more reference signals. In some cases, the one or more reference signals for the one or more interference parameters may be associated with the same QCL information set. In some cases, the one or more reference signals may include one or more synchronization signals. In some cases, the UE 115-g may receive the reference signal to obtain the one or more interference parameters. In some cases, sending an indication of the one or more interference parameters may include sending a sequence set corresponding to the one or more interference parameters.

[0161] In some cases, one or more interference parameters may include a maximum interference power for receiving a first transmission from UE 115-e using the first wireless resource set. In some cases, an indication of one or more interference parameters may be sent according to a transmit power parameter for a transmission to UE 115-g. In some cases, one or more interference parameters may include an interference power adjustment for receiving a transmission from UE 115-e. In some cases, the indication of one or more interference parameters may include an indication of a time domain resource set for the first wireless resource set. In some cases, the indication of one or more interference parameters may include an indication of a frequency domain resource set for the first wireless resource set. In some cases, the frequency domain resource set for the first wireless resource set may be indicated by a frequency location at which the indication is sent. In some cases, the third wireless resource set at least partially overlaps with the first wireless resource set in frequency. In some cases, the third wireless resource set may overlap with the first wireless resource set for the complete duration of the third wireless resource set.

[0162] In some examples, at 420, UE 115-g may determine a signal quality metric based on transmission parameters used to communicate with UE 115-h.

[0163] At 425, UE 115-g may determine transmission parameters for communicating with UE 115-h using a second set of wireless resources based at least in part on one or more interference parameters received from UE 115-f, wherein the second set of wireless resources at least partially overlaps with the first set of wireless resources (e.g., in the time domain, in the frequency domain).

[0164] In some cases, UE 115-g may determine a maximum transmit power for communicating with UE 115-h based on the signal quality metric and the maximum interference power (e.g., as determined at 420). In some examples, UE 115-g may compare the signal quality metric to a signal quality threshold and may determine whether the transmission parameters are sufficient for communicating with UE 115-h based on the comparison. For example, UE 115-g may determine that the transmission parameters are sufficient for further communication with UE 115-h based on the signal quality metric exceeding the signal quality threshold.

[0165] In some examples, UE 115-g may measure the path loss of a signal received from UE 115-f. In some cases, UE 115-g may measure the received power of a transmission received from UE 115-f and determine the path loss based on the received power of the transmission from UE 115-f and a transmit power parameter.

[0166] In some cases, UE 115-g may determine a maximum transmit power for communicating with UE 115h based on the interference power adjustment at 425. In some cases, UE 115-g may increase the maximum transmit power (e.g., of UE 115-g) based on the interference power adjustment indicating an increase in the maximum interference power. In some cases, UE 115-g may decrease the maximum transmit power based on the interference power adjustment indicating a decrease in the maximum interference power.

[0167] In some examples, at 430, UE 115-g may send a second transmission to UE 115-h during a second time domain resource set, for example, based on a maximum transmit power (e.g., as determined at 425), and UE 115-h may receive a second transmission from UE 115-g during a second time domain resource set, for example, based on a maximum transmit power (e.g., as determined at 425).

[0168] In some examples, at 435, UE 115-g may send a third transmission to UE 115-h outside the set of time domain resources (e.g., after time duration 408), and UE 115h may receive the third transmission from UE 115g outside the set of time domain resources (e.g., after time duration 408). In various examples, the third transmission may be sent by UE 115-g according to the maximum transmit power determined at 425, or with a transmit power that exceeds the maximum transmit power determined at 425 (e.g., because the first transmission of 405 may have completed by the end of time duration 408).

[0169] Figure 5 A block diagram 500 of a device 505 supporting interference power control for sidelink communications according to aspects of the present disclosure is shown. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0170] The receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to interference power control for full-duplex side link communications, etc.). The information may be passed to other components of the device 505. The receiver 510 may be a reference Figure 8 Examples of various aspects of the transceiver 820 are described. The receiver 510 may utilize a single antenna or a group of antennas.

[0171] In one example, the communication manager 515 can receive a first transmission from a first device at a second device using a first set of wireless resources, determine (e.g., be associated with) one or more interference parameters for receiving the first transmission from the first device, the one or more interference parameters being associated with a second transmission from a third device to a fourth device using a second set of wireless resources, and send an indication of the one or more interference parameters using a third set of wireless resources. In one example, sending the indication of the one or more interference parameters can include sending in full-duplex operation using a third set of wireless resources that at least partially overlaps with the first set of wireless resources in the time domain.

[0172] In one example, the communication manager 515 may receive an indication of one or more interference parameters for (e.g., associated with) receiving a first transmission from a first device using a first wireless resource set at a second device, the indication being received from the second device via a third wireless resource set at a third device; determine transmission parameters for communicating with a fourth device using a second wireless resource set based on the one or more interference parameters received from the second device, the second wireless resource set at least partially overlapping with the first wireless resource set; and communicate with the fourth device using the second wireless resource set based on the transmission parameters.

[0173] The communication manager 515 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 515 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof. The communication manager 515 may be an example of aspects of the communication manager 810 described herein.

[0174] The communication manager 515 or its subcomponents may be physically located at various locations, including being distributed so that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or combinations thereof).

[0175] Transmitter 520 can transmit signals generated by other components of device 505. In some examples, transmitter 520 can be co-located with receiver 510 in a transceiver module. For example, transmitter 520 can be a reference Figure 8 Examples of various aspects of the transceiver 820 are described. The transmitter 520 may utilize a single antenna or a group of antennas.

[0176] Figure 6 A block diagram 600 of a device 605 supporting interference power control for sidelink communications according to aspects of the present disclosure is shown. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 650. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0177] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to interference power control for sidelink communications, etc.). The information may be passed to other components of the device 605. The receiver 610 may be a reference Figure 8 Examples of various aspects of the transceiver 820 are described. The receiver 610 may utilize a single antenna or a group of antennas.

[0178] Communications manager 615 may be an example of aspects of communications manager 515 as described herein. Communications manager 615 may include sidelink transmission receiving component 620, interference parameter determining component 625, interference parameter indicating component 630, transmission parameter component 635, and sidelink transmission sending component 640. Communications manager 615 may be an example of aspects of communications manager 810 as described herein.

[0179] In one example, the sidelink transmission receiving component 620 may receive a first transmission from a first device at a second device using a first wireless resource set. The interference parameter determining component 625 may determine one or more interference parameters for receiving the first transmission from the first device, the one or more interference parameters being associated with a second transmission from a third device to a fourth device using a second wireless resource set. The interference parameter indicating component 630 may send an indication of one or more interference parameters using a third wireless resource set. In one example, the interference parameter indicating component 630 may be configured to send an indication of one or more interference parameters using a third wireless resource set that at least partially overlaps with the first wireless resource set in a time domain in full-duplex operation.

[0180] In one example, the interference parameter indicating component 630 may receive an indication of one or more interference parameters for receiving a first transmission from a first device using a first wireless resource set at a second device, the indication being received from the second device at a third device using a third wireless resource set. The transmission parameter component 635 may determine, based on the one or more interference parameters received from the second device, a transmission parameter for communicating with a fourth device using a second wireless resource set, the second wireless resource set at least partially overlapping the first wireless resource set. The sidelink transmission sending component 640 may communicate with the fourth device using the second wireless resource set based on the transmission parameter.

[0181] Transmitter 650 can transmit signals generated by other components of device 605. In some examples, transmitter 650 can be co-located with receiver 610 in a transceiver module. For example, transmitter 650 can be a reference Figure 8 Examples of various aspects of the transceiver 820 are described. The transmitter 650 may utilize a single antenna or a group of antennas.

[0182] Figure 7 A block diagram 700 of a communication manager 705 supporting interference power control for sidelink communications in accordance with aspects of the present disclosure is shown. The communication manager 705 can be an example of aspects of the communication manager 515, the communication manager 615, or the communication manager 810 described herein. The communication manager 705 can include a sidelink transmission receiving component 710, an interference parameter determining component 715, an interference parameter indicating component 720, a modulation component 725, an interference level component 730, a transmission parameter component 735, a sidelink transmission sending component 740, a demodulation component 745, and a signal quality metric component 750. Each of these modules can be in communication with each other (e.g., via one or more buses), directly or indirectly.

[0183] The sidelink transmission receiving component 710 can receive, at the second device, a first transmission from the first device using the first set of wireless resources. In some examples, the communication between the first device and the second device includes a sidelink communication.

[0184] Interference parameter determining component 715 can determine one or more interference parameters for receiving a first transmission from the first device, the one or more interference parameters associated with a second transmission from the third device to the fourth device using the second set of radio resources.

[0185] In some cases, the one or more interference parameters include a maximum interference power for receiving a first transmission from the first device using the first set of radio resources.In some examples, interference parameter determining component 715 can determine the maximum interference power based on a received signal power value and a target channel quality for communicating with the first device.

[0186] In some cases, the one or more interference parameters include an interference power adjustment for receiving a transmission from the first device. In some examples, the interference parameter determination component 715 can determine the interference power adjustment based on comparing the current interference level with the interference threshold. In some cases, the interference power adjustment indicates a decrease in the maximum transmit power for a second transmission from the third device to the fourth device, the interference power adjustment being based on the current interference level exceeding the interference threshold. In some cases, the interference power adjustment indicates an increase in the maximum transmit power for a second transmission from the third device to the fourth device, the interference power adjustment being based on the current interference level not exceeding the interference threshold.

[0187] The interference parameter indicating component 720 may use a third wireless resource set to send an indication of one or more interference parameters. The interference parameter indicating component 720 may use a third wireless resource set that at least partially overlaps with the first wireless resource set in the time domain to send an indication of one or more interference parameters in full-duplex operation. In some cases, the third wireless resource set at least partially overlaps with the first wireless resource set in frequency. In some cases, the third wireless resource set overlaps with the first wireless resource set within a complete time duration of the third wireless resource set.

[0188] In some examples, the interference parameter indicating component 720 can send an indication of one or more interference parameters to a third device, and wherein the second set of wireless resources can at least partially overlap with the first set of wireless resources.

[0189] In some examples, interference parameter indicating component 720 can broadcast an indication of one or more interference parameters. In some examples, interference parameter indicating component 720 can periodically send an indication of one or more interference parameters in a set of transmission time intervals.

[0190] In some examples, to send an indication of one or more interference parameters, interference parameter indicating component 720 can send one or more reference signals. In some cases, the one or more reference signals can include one or more synchronization signals.

[0191] In some examples, to send an indication of one or more interference parameters, interference parameter indicating component 720 may send a sequence set corresponding to the one or more interference parameters.

[0192] In some examples, sending an indication of one or more interference parameters to a third device may include a sidelink communication.

[0193] In some cases, the indication of one or more interference parameters may be sent as a function of a transmit power parameter for transmissions to the third device.

[0194] In some cases, the indication of one or more interference parameters may include an indication of a time domain resource set for the first set of radio resources.

[0195] In some cases, the indication of one or more interference parameters may include an indication of a frequency domain resource set for the first set of radio resources. In some cases, the frequency domain resource set for the first set of radio resources is indicated by a frequency location at which the indication is sent.

[0196] In some cases, the transmission from the third device to the fourth device includes sidelink communication.

[0197] In some cases, interference parameter indicating component 720 may receive an indication of one or more interference parameters for receiving a first transmission from a first device using a first set of wireless resources at a second device, the indication received at a third device from a second device over a third set of wireless resources.

[0198] In some examples, interference parameter indicating component 720 may periodically receive indications of one or more interference parameters during a set of transmission time intervals.

[0199] In some examples, to receive an indication of one or more interference parameters, interference parameter indicating component 720 can receive a reference signal for the one or more interference parameters. In some cases, the one or more reference signals include one or more synchronization signals.

[0200] In some examples, to receive an indication of one or more interference parameters, interference parameter indicating component 735 may receive a set of sequences corresponding to the one or more interference parameters.

[0201] In some examples, receiving an indication of one or more interference parameters includes sidelink communication. In some examples, receiving a first transmission from a first device by a second device includes sidelink communication.

[0202] In some cases, the third set of wireless resources used to receive the indication of one or more interference parameters at least partially overlaps in the time domain with the first set of wireless resources used by the second device to receive the first transmission from the first device.

[0203] In some cases, the one or more interference parameters include a maximum interference power at which the second device receives a first transmission from the first device using the first set of radio resources. In some cases, the one or more interference parameters include an interference power adjustment to the maximum interference power of a transmission received by the second device from the first device.

[0204] In some cases, the indication of one or more interference parameters includes an indication of a time domain resource set for the first radio resource set. In some cases, the indication of one or more interference parameters includes an indication of a frequency domain resource set for the first radio resource set. In some cases, the frequency domain resource set for the first radio resource set is indicated by a frequency location at which the indication of the frequency domain resource set is received.

[0205] The transmission parameter component 735 can determine the transmission parameters for communicating with the fourth device using the second set of wireless resources based on the one or more interference parameters received from the second device. In some examples, the second set of wireless resources can at least partially overlap with the first set of wireless resources.

[0206] In some examples, transmission parameter component 735 can determine a maximum transmit power for communicating with a fourth device based on a signal quality metric and a maximum interference power.

[0207] In some examples, the transmission parameter component 735 can determine a maximum transmit power for communicating with the fourth device based on the interference power adjustment. In some examples, the transmission parameter component 735 can increase the maximum transmit power based on the interference power adjustment indicating an increase in the maximum interference power. In some examples, the transmission parameter component 735 can reduce the maximum transmit power based on the interference power adjustment indicating a decrease in the maximum interference power.

[0208] In some examples, transmission parameter component 735 may determine one or more additional sets of resources for communicating with a fourth device based on determining that the transmission parameters are insufficient.

[0209] In some examples, the side link transmission sending component 740 can use the second wireless resource set based on the transmission parameter to communicate with the fourth device. In some examples, the side link transmission sending component 740 can use the second wireless resource set to send one or more transmissions to the fourth device. In some examples, the side link transmission sending component 740 can send a second transmission to the fourth device during the time domain resource set according to the maximum transmit power. In some examples, communicating with the fourth device includes side link communication.

[0210] In some examples, the sidelink transmission transmitting component 740 can transmit a third transmission to the fourth device outside the time domain resource set according to the maximum transmit power. In some examples, the sidelink transmission transmitting component 740 can use a transmit power exceeding the maximum transmit power to transmit the third transmission to the fourth device outside the time domain resource set.

[0211] In some examples, sidelink transmission sending component 740 can perform further communications with the fourth device based on determining that the transmission parameters are sufficient.

[0212] In some examples, the sidelink transmission transmitting component 740 can communicate with the fourth device during the configured time domain resource set according to the maximum transmit power based on the transmission parameters.

[0213] In some examples, the sidelink transmission transmitting component 740 can communicate with the first device outside the configured time domain resource set according to the maximum transmit power. In some examples, the sidelink transmission transmitting component 740 can use a transmit power exceeding the maximum transmit power to communicate with the first device outside the configured time domain resource set.

[0214] In some examples, communicating with a fourth device using the second set of wireless resources may include the sidelink transmission transmitting component 740 performing full-duplex operation.

[0215] In some examples, to send an indication of one or more interference parameters, modulation component 725 can send one or more modulated interference parameters.

[0216] In some examples, interference level component 730 can determine a current interference level for communicating with the first device.

[0217] In some examples, to receive an indication of one or more interference parameters, the demodulation component 745 can demodulate the reference signal to obtain the one or more interference parameters.

[0218] In some examples, signal quality metric component 750 can determine a signal quality metric for communicating with a second device. In some examples, signal quality metric component 750 can measure a path loss of a signal received from the second device. In some examples, signal quality metric component 750 can measure a received power of a transmission received from the second device. In some examples, signal quality metric component 750 can determine the path loss based on a received power parameter and a transmit power parameter of the transmission from the second device.

[0219] In some examples, signal quality metric component 750 can determine a signal quality metric based on the transmission parameters used to communicate with the fourth device. In some examples, signal quality metric component 750 can compare the signal quality metric with a signal quality threshold. In some examples, signal quality metric component 750 can determine whether the transmission parameters are sufficient for further communication with the fourth device based on the comparison.

[0220] In some examples, signal quality metric component 750 can determine that the transmission parameter is sufficient for further communication with the fourth device based on the signal quality metric exceeding the signal quality threshold. In some examples, signal quality metric component 755 can determine that the transmission parameter is insufficient for further communication with the fourth device based on the signal quality metric not exceeding the signal quality threshold.

[0221] Figure 8 A diagram of a system 800 including a device 805 supporting interference power control for sidelink communications according to aspects of the present disclosure is shown. The device 805 may be an example of or include components of a device 505, device 605, or UE 115 as described herein. The device 805 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 810, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may be in electronic communication via one or more buses (e.g., bus 845).

[0222] In some examples, the communication manager 810 may receive a first transmission from the first device at the second device using the first set of wireless resources, determine one or more interference parameters for receiving the first transmission from the first device, the one or more interference parameters associated with a second transmission from the third device to the fourth device using the second set of wireless resources, and send an indication of the one or more interference parameters using the third set of wireless resources. In some examples, sending the one or more interference parameters may include transmission in full-duplex operation using a third set of wireless resources that at least partially overlaps with the first set of wireless resources in the time domain.

[0223] In some examples, the communication manager 810 may receive an indication of one or more interference parameters for receiving a first transmission from a first device using a first wireless resource set at a second device, the indication being received from the second device via a third wireless resource set at a third device; determine transmission parameters for communicating with a fourth device using a second wireless resource set based on the one or more interference parameters received from the second device, the second wireless resource set at least partially overlapping with the first wireless resource set; and communicate with the fourth device using the second wireless resource set based on the transmission parameters.

[0224] I / O controller 815 can manage input and output signals for device 805. I / O controller 815 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 815 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 815 can utilize a computer such as a Or another known operating system. In other cases, I / O controller 815 can represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 815 can be implemented as part of a processor. In some cases, a user can interact with device 805 via I / O controller 815 or via hardware components controlled by I / O controller 815.

[0225] The transceiver 820 may communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 820 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0226] In some cases, a wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of sending or receiving multiple wireless transmissions concurrently.

[0227] The memory 830 may include RAM and ROM. The memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 830 may contain a basic input / output system (BIOS), etc., which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0228] The processor 840 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks that support interference power control for side link communications).

[0229] The code 835 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 835 may be stored in a non-transitory computer-readable medium (such as a system memory or other type of memory). In some cases, the code 835 may not be directly executed by the processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0230] Fig. 9 A flow chart illustrating a method 900 for supporting interference power control for sidelink communications according to aspects of the present disclosure is shown. The operations of the method 900 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 900 may be implemented by a UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0231] At 905, the UE may receive a first transmission from a first device using a first set of wireless resources at a second device. The operations of 905 may be performed according to the methods described herein. In some examples, aspects of the operations of 905 may be performed as described in reference to Figures 5 to 8 The side link transmission receiving component described is performed.

[0232] At 910, the UE may determine one or more interference parameters for receiving a first transmission from the first device, the one or more interference parameters being associated with a second transmission from the third device to the fourth device using the second set of radio resources. The operations of 910 may be performed according to the methods described herein. In some examples, aspects of the operations of 910 may be performed as described in reference to Figures 5 to 8 The interference parameter determination component described is performed.

[0233] At 915, the UE may send an indication of one or more interference parameters using a third set of radio resources. In some examples, the sending of 915 may include transmission in full-duplex operation using a third set of radio resources that at least partially overlaps the first set of radio resources in the time domain.

[0234] The operations of 915 may be performed according to the methods described herein. In some examples, various aspects of the operations of 915 may be performed as described in reference to Figures 5 to 8 The disturbance parameters describe what the component is instructed to do.

[0235] Fig.10 A flow chart illustrating a method 1000 for supporting interference power control for sidelink communications according to aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0236] At 1005, the UE may receive an indication of one or more interference parameters for receiving a first transmission from a first device using a first set of radio resources at a second device, the indication being received at a third device from a second device using a third set of radio resources. The operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be performed as described in reference to Figures 5 to 8 The described interference parameters instruct the components to perform.

[0237] At 1010, the UE may determine, based on one or more interference parameters received from the second device, transmission parameters for communicating with a fourth device using a second set of wireless resources, the second set of wireless resources at least partially overlapping the first set of wireless resources. The operations of 1010 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1010 may be performed as described in reference to Figures 5 to 8 The transfer parameter components described are executed.

[0238] At 1015, the UE may communicate with the fourth device using the second set of wireless resources based on the transmission parameters. The operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be as described in reference to Figures 5 to 8 The sidelink transmission sending component described is performed.

[0239] It should be noted that the above methods describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects of two or more methods may be combined.

[0240] The technology described in this article can be used in various wireless communication systems, for example, code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system, orthogonal frequency division multiple access (OFDMA) system, single carrier frequency division multiple access (SC-FDMA) system and other systems. CDMA system can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 version is commonly referred to as CDMA20001X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, high speed packet data (HRPD), etc. UTRA includes broadband CDMA (WCDMA) and other variants of CDMA. TDMA system can implement radio technologies such as global system for mobile communication (GSM).

[0241] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-APro are versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-APro, NR, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The technology described herein can be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may be applicable beyond LTE, LTE-A, LTE-A Pro, or NR applications.

[0242] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UEs with service subscriptions to a network provider. Small cells are associated with lower power base stations compared to macro cells, and small cells may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency bands compared to macro cells. According to various examples, small cells may include pico cells, femto cells, and micro cells. For example, a pico cell may cover a smaller geographic area and may allow unrestricted access to UEs with service subscriptions to a network provider. A femto cell may also cover a smaller geographic area (e.g., a home) and may provide restricted access to UEs associated with a femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). The eNB of a macro cell may be referred to as a macro eNB. The eNB of a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells and may also support communications using one or more component carriers.

[0243] One or more wireless communication systems described herein may support synchronous operation or asynchronous operation. For synchronous operation, base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, base stations may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0244] The information and signals described herein may be represented using any of a variety of different processes and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0245] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a DSP, an ASIC, 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 an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0246] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or sent by a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0247] Computer-readable media include both non-transitory computer storage media and communication media, including any media that facilitates a computer program to be transferred from one place to another.Non-transitory storage media can be any available media that can be accessed by a general or special computer.As an example and not limitation, non-transitory computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage devices, or can be used to carry or store instructions or data structure forms of desired program code means and can be accessed by a general or special computer, or a general or special processor.Any connection is also properly referred to as a computer-readable medium.For example, if the software is sent from a website, a server, or other remote sources using a coaxial cable, a fiber optic cable, a twisted pair, a digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, 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.

[0248] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an exemplary step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0249] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0250] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or that fall within the scope of the claims. The term "exemplary" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0251] The description herein is provided to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the universal principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication, comprising: receiving an indication of one or more interference parameters for receiving, at a second device, a first transmission from a first device using a first set of wireless resources, the indication being received at a third device from the second device via a third set of wireless resources; determining, based at least in part on the one or more interference parameters received from the second device, transmission parameters for communicating with a fourth device using the second set of wireless resources, the second set of wireless resources at least partially overlapping with the first set of wireless resources; as well as Communicate with the fourth device using the second set of wireless resources based at least in part on the transmission parameters.

2. The method of claim 1, wherein: Receiving an indication of one or more interference parameters includes: Indications of the one or more interference parameters are received periodically in a plurality of transmission time intervals.

3. The method of claim 1, wherein: Communicating with the fourth device includes: One or more transmissions are sent to the fourth device using the second set of radio resources.

4. The method of claim 1, wherein: The third set of wireless resources used to receive the indication of the one or more interference parameters at least partially overlaps in the time domain with the first set of wireless resources used by the second device to receive the first transmission from the first device.

5. The method of claim 1, wherein: Receiving an indication of the one or more interference parameters includes: One or more reference signals for the one or more interference parameters are received.

6. The method of claim 5, wherein: The one or more reference signals include one or more synchronization signals.

7. The method of claim 1, wherein: Receiving an indication of the one or more interference parameters includes: A sequence set corresponding to the one or more interference parameters is received.

8. The method of claim 1, wherein: The one or more interference parameters include a maximum interference power for the second device to receive the first transmission from the first device using the first set of radio resources.

9. The method of claim 1, further comprising: determining a signal quality metric for communicating with the second device; as well as A maximum transmit power for communicating with the fourth device is determined based at least in part on the signal quality metric and the maximum interference power.

10. The method of claim 9, wherein: Determining the signal quality metric includes: A path loss of a signal received from the second device is measured.

11. The method of claim 10, wherein: Measuring the path loss includes: measuring a received power of a transmission received from the second device; and The path loss is determined based at least in part on the received power and a transmit power parameter for transmissions from the second device.

12. The method of claim 1, wherein: The one or more interference parameters include an interference power adjustment for a maximum interference power at which the second device receives transmissions from the first device.

13. The method of claim 12, further comprising: A maximum transmit power for communicating with the fourth device is determined based at least in part on the interference power adjustment.

14. The method of claim 13, wherein: Determining the maximum transmit power for communicating with the fourth device includes: The maximum transmit power is increased based at least in part on the interference power adjustment indicating an increase in the maximum interference power.

15. The method of claim 13, wherein: Determining the maximum transmit power for communicating with the fourth device includes: The maximum transmit power is reduced based at least in part on the interference power adjustment indicating a reduction in the maximum interference power.

16. The method of claim 1, wherein: The indication of the one or more interference parameters includes an indication of a time domain resource set for the first set of radio resources.

17. The method of claim 1, wherein: The indication of the one or more interference parameters includes an indication of a frequency domain resource set for the first set of radio resources.

18. The method of claim 17, wherein: The frequency domain resource set for the first set of radio resources is indicated by a frequency location at which the indication of the frequency domain resource set is received.

19. The method of claim 1, wherein: Communicating with the fourth device includes: sending a second transmission to the fourth device during the set of time domain resources according to the maximum transmit power; and A third transmission is sent to the fourth device outside the set of time-domain resources according to the maximum transmit power.

20. The method of claim 1, wherein: Communicating with the fourth device includes: sending a second transmission to the fourth device during the set of time domain resources according to the maximum transmit power; and A third transmission is sent to the fourth device outside of the set of time-domain resources using a transmit power that exceeds the maximum transmit power.

21. The method of claim 1, further comprising: determining a signal quality metric based at least in part on the transmission parameters used to communicate with the fourth device; comparing the signal quality metric to a signal quality threshold; as well as A determination is made based at least in part on the comparison whether the transmission parameters are sufficient for further communication with the fourth device.

22. The method of claim 21, wherein: Communicating with the fourth device includes: determining, based at least in part on the signal quality metric exceeding the signal quality threshold, that the transmission parameter is sufficient for further communications with the fourth device; and The further communicating with the fourth device is performed based at least in part on determining that the transmission parameter is sufficient.

23. The method of claim 21, wherein: Communicating with the fourth device includes: determining, based at least in part on the signal quality metric not exceeding the signal quality threshold, that the transmission parameters are insufficient for further communication with the fourth device; and One or more additional sets of resources for communicating with the fourth device are determined based at least in part on determining that the transmission parameters are insufficient.

24. The method of claim 1, wherein: Communicating with the fourth device includes: communicating with the fourth device during the configured set of time domain resources according to a maximum transmit power based at least in part on the transmission parameters; and Communicate with the first device outside the configured time domain resource set according to the maximum transmit power.

25. The method of claim 1, wherein: Communicating with the fourth device includes: communicating with the fourth device during the configured set of time domain resources according to a maximum transmit power based at least in part on the transmission parameters; and The method further comprises: communicating with the first device outside the configured set of time domain resources using a transmit power exceeding the maximum transmit power.

26. The method of claim 1, wherein: Receiving, by the second device, the first transmission from the first device comprises a sidelink communication.

27. The method of claim 1, wherein: Receiving the indication of the one or more interference parameters comprises a sidelink communication.

28. The method of claim 1, wherein: Communicating with the fourth device includes sidelink communications.

29. The method of claim 1, wherein: Receiving the indication of the one or more interference parameters from the second device via the third set of wireless resources and communicating with the fourth device using the second set of wireless resources comprises full-duplex operation.

30. An apparatus for wireless communication, comprising: processor; a memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor to cause the device to: receiving an indication of one or more interference parameters for receiving, at a second device, a first transmission from a first device using a first set of wireless resources, the indication being received at a third device from the second device via a third set of wireless resources; determining, based at least in part on the one or more interference parameters received from the second device, transmission parameters for communicating with a fourth device using the second set of wireless resources, the second set of wireless resources at least partially overlapping with the first set of wireless resources; as well as Communicate with the fourth device using the second set of wireless resources based at least in part on the transmission parameters.

31. The device of claim 30, wherein: The instructions for receiving an indication of the one or more interference parameters are executable by the processor to cause the apparatus to: Indications of the one or more interference parameters are received periodically in a plurality of transmission time intervals.

32. The apparatus of claim 30, wherein: The instructions for communicating with the fourth device can be executed by the processor to cause the apparatus to perform the following operations: One or more transmissions are sent to the fourth device using the second set of radio resources.

33. The apparatus of claim 30, wherein: The third set of wireless resources used to receive the indication of the one or more interference parameters at least partially overlaps in the time domain with the first set of wireless resources used by the second device to receive the first transmission from the first device.

34. The apparatus of claim 30, wherein: The instructions for receiving an indication of the one or more interference parameters are executable by the processor to cause the apparatus to: One or more reference signals for the one or more interference parameters are received.

35. The apparatus of claim 30, wherein: The one or more reference signals include one or more synchronization signals.

36. The apparatus of claim 30, wherein: The instructions for receiving an indication of the one or more interference parameters are executable by the processor to cause the apparatus to: A sequence set corresponding to the one or more interference parameters is received.

37. The apparatus of claim 30, wherein: The one or more interference parameters include a maximum interference power for the second device to receive the first transmission from the first device using the first set of radio resources.

38. The apparatus of claim 30, wherein: The instructions can also be executed by the processor to cause the device to perform the following operations: determining a signal quality metric for communicating with the second device; as well as A maximum transmit power for communicating with the fourth device is determined based at least in part on the signal quality metric and the maximum interference power.

39. The apparatus of claim 38, wherein: The instructions for determining the signal quality metric are executable by the processor to cause the apparatus to: A path loss of a signal received from the second device is measured.

40. The apparatus of claim 39, wherein: The instructions for measuring the path loss are executable by the processor to cause the apparatus to: measuring a received power of a transmission received from the second device; as well as The path loss is determined based at least in part on the received power and a transmit power parameter for transmissions from the second device.

41. The apparatus of claim 30, wherein: The one or more interference parameters include an interference power adjustment for a maximum interference power at which the second device receives transmissions from the first device.

42. The apparatus of claim 41, wherein: The instructions can also be executed by the processor to cause the device to perform the following operations: A maximum transmit power for communicating with the fourth device is determined based at least in part on the interference power adjustment.

43. The apparatus of claim 42, wherein: The instructions for determining the maximum transmit power for communicating with the fourth device are executable by the processor to cause the apparatus to: The maximum transmit power is increased based at least in part on the interference power adjustment indicating an increase in the maximum interference power.

44. The apparatus of claim 42, wherein: The instructions for determining the maximum transmit power for communicating with the fourth device are executable by the processor to cause the apparatus to: The maximum transmit power is reduced based at least in part on the interference power adjustment indicating a reduction in the maximum interference power.

45. The apparatus of claim 30, wherein: The indication of the one or more interference parameters includes an indication of a time domain resource set for the first set of radio resources.

46. ​​The apparatus of claim 30, wherein: The indication of the one or more interference parameters includes an indication of a frequency domain resource set for the first set of radio resources.

47. The apparatus of claim 46, wherein: The indication of the frequency domain resource set for the first set of radio resources is indicated by a frequency location at which the indication of the frequency domain resource set is received.

48. The apparatus of claim 30, wherein: The instructions for communicating with the fourth device can be executed by the processor to cause the apparatus to perform the following operations: sending a second transmission to the fourth device during the set of time domain resources according to the maximum transmit power; and A third transmission is sent to the fourth device outside the set of time-domain resources according to the maximum transmit power.

49. The apparatus of claim 30, wherein: sending a second transmission to the fourth device during the set of time domain resources according to the maximum transmit power; and A third transmission is sent to the fourth device outside of the set of time-domain resources using a transmit power that exceeds the maximum transmit power.

50. The apparatus of claim 30, wherein: The instructions can also be executed by the processor to cause the device to perform the following operations: determining a signal quality metric based at least in part on the transmission parameters used to communicate with the fourth device; comparing the signal quality metric to a signal quality threshold; as well as A determination is made based at least in part on the comparison whether the transmission parameters are sufficient for further communication with the fourth device.

51. The apparatus of claim 50, wherein: The instructions for communicating with the fourth device can be executed by the processor to cause the apparatus to perform the following operations: determining, based at least in part on the signal quality metric exceeding the signal quality threshold, that the transmission parameter is sufficient for further communications with the fourth device; and The further communicating with the fourth device is performed based at least in part on determining that the transmission parameter is sufficient.

52. The apparatus of claim 50, wherein: The instructions for communicating with the fourth device can be executed by the processor to cause the apparatus to perform the following operations: determining, based at least in part on the signal quality metric not exceeding the signal quality threshold, that the transmission parameter is insufficient for further communications with the fourth device; as well as One or more additional sets of resources for communicating with the fourth device are determined based at least in part on determining that the transmission parameters are insufficient.

53. The apparatus of claim 30, wherein: The instructions for communicating with the fourth device can be executed by the processor to cause the apparatus to perform the following operations: communicating with the fourth device during the configured set of time domain resources according to a maximum transmit power based at least in part on the transmission parameters; as well as Communicate with the first device outside the configured time domain resource set according to the maximum transmit power.

54. The apparatus of claim 30, wherein: The instructions for communicating with the fourth device can be executed by the processor to cause the apparatus to perform the following operations: communicating with the fourth device during the configured set of time domain resources according to a maximum transmit power based at least in part on the transmission parameters; as well as Communicate with the first device outside the configured time domain resource set using a transmit power exceeding the maximum transmit power.

55. The apparatus of claim 30, wherein: Receiving, by the second device, the first transmission from the first device comprises a sidelink communication.

56. The apparatus of claim 30, wherein: Receiving an indication of one or more interference parameters includes a sidelink communication.

57. The apparatus of claim 30, wherein: Communicating with the fourth device includes sidelink communications.

58. The apparatus of claim 30, wherein: Receiving the indication of the one or more interference parameters from the second device via the third set of wireless resources and communicating with the fourth device using the second set of wireless resources comprises full-duplex operation.

59. An apparatus for wireless communication, comprising: means for receiving an indication of one or more interference parameters for receiving, at a second device, a first transmission from a first device using a first set of wireless resources, the indication being received at a third device from the second device via a third set of wireless resources; means for determining, based at least in part on the one or more interference parameters received from the second device, transmission parameters for communicating with a fourth device using the second set of wireless resources, the second set of wireless resources at least partially overlapping with the first set of wireless resources; as well as Means for communicating with the fourth device using the second set of wireless resources based at least in part on the transmission parameters.

60. A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to: receiving an indication of one or more interference parameters for receiving, at a second device, a first transmission from a first device using a first set of wireless resources, the indication being received at a third device from the second device via a third set of wireless resources; determining, based at least in part on the one or more interference parameters received from the second device, transmission parameters for communicating with a fourth device using the second set of wireless resources, the second set of wireless resources at least partially overlapping with the first set of wireless resources; as well as Communicate with the fourth device using the second set of wireless resources based at least in part on the transmission parameters.

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