Full duplex for line-of-sight multiple input multiple output

Abstract

The first wireless device may transmit a message to the second wireless device indicating a capability of the first wireless device to support full-duplex line-of-sight (LOSLOS) MIMO MIMO communications. The first wireless device may receive control signaling from the second wireless device indicating assigned UL channel resources for one or more UL communications, assigned DL channel resources for one or more DL communications, a first set of LOS MIMO transmission modes for the one or more UL communications, and a second set of LOS MIMO transmission modes for the one or more DL communications. The UL channel resources may at least partially overlap with the DL channel resources in time, frequency, or both. The first wireless device may communicate one or more UL communications and one or more DL communications based on the control signaling.

Description

[Technical Field]

[0001] The following relates to wireless communications, including full duplex for line-of-sight (LOS) multiple-input multiple-output (MIMO). [Background technology]

[0002] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasts, etc. These systems may be capable of supporting 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, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth-generation (5G) systems, sometimes referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may sometimes be known as user equipment (UE). The components within a wireless communication system may be coupled (e.g., operatively, communicatively, functionally, electronically, and / or electrically) with one another.

[0003] Some wireless devices may be capable of performing full-duplex communication. For example, a wireless device may be capable of transmitting a first signal while simultaneously receiving a second signal. However, in some cases, conventional full-duplex operation may not be suitable for line-of-sight (LOS) multiple-input multiple-output (MIMO) communication schemes. Summary of the Invention

[0004] The described techniques relate to improved methods, systems, devices, and apparatuses supporting full-duplex for line-of-sight (LOS) multiple-input multiple-output (MIMO). Generally, the described techniques provide for configuring wireless devices to perform full-duplex communication using different LOS MIMO transmission modes. A first wireless device may transmit a message to a second wireless device indicating the first wireless device's capability to support full-duplex LOS MIMO communication. The first wireless device may receive control signaling from the second wireless device indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of LOS MIMO transmission modes for the one or more uplink communications, and a second set of LOS MIMO transmission modes for the one or more downlink communications. The uplink channel resources may at least partially overlap with the downlink channel resources in time, frequency, or both. The first wireless device may communicate one or more uplink communications and one or more downlink communications based on the control signaling.

[0005] A method for wireless communication in a first wireless device is described. The method may include transmitting a message to a second wireless device indicating a capability of the first wireless device to support full-duplex LOS MIMO communications; receiving control signaling from the second wireless device in response to the message, the control signaling indicating one or more of uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, or a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both; and communicating the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes and communicating the one or more downlink communications over the downlink channel resources in accordance with the second set of one or more LOS MIMO transmission modes based on the control signaling.

[0006] An apparatus for wireless communication in a first wireless device is described. The apparatus may include a processor; a memory coupled to the processor; and one or more instructions stored in the memory, wherein the one or more instructions cause the apparatus, based on the one or more instructions, to transmit a message to a second wireless device indicating a capability of the first wireless device to support full-duplex LOS MIMO communications; receive control signaling from the second wireless device in response to the message indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time, frequency, or both; and, based on the control signaling, communicate one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes; The method is executable by the processor to communicate one or more downlink communications over the downlink channel resources according to a second set of MIMO transmission modes.

[0007] Another apparatus for wireless communication in a first wireless device is described. The apparatus may include means for transmitting a message to a second wireless device indicating a capability of the first wireless device to support full-duplex LOS MIMO communications; means for receiving control signaling from the second wireless device in response to the message, the control signaling indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both; and means for communicating one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes and communicating one or more downlink communications over the downlink channel resources in accordance with the second set of one or more LOS MIMO transmission modes based on the control signaling.

[0008] A non-transitory computer-readable medium storing code for wireless communication in a first wireless device is described. The code may include instructions executable by a processor to: send a message to a second wireless device indicating a capability of the first wireless device to support full-duplex LOS MIMO communications; receive control signaling from the second wireless device in response to the message indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both; and communicate one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes and communicate one or more downlink communications over the downlink channel resources in accordance with the second set of one or more LOS MIMO transmission modes based on the control signaling.

[0009] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include operations, features, means, or instructions for receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources, and receiving a second control message from the second wireless device indicating a first channel resource pairing of the plurality of channel resource pairings including an uplink channel resource and a downlink channel resource.

[0010] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include operations, features, means, or instructions for receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of transmission configuration indicator (TCI) states, and receiving a second control message from the second wireless device indicating one or both of a first TCI state of the plurality of TCI states to be used for one or more uplink communications or a second TCI state of the plurality of TCI states to be used for one or more downlink communications.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include operations, features, means, or instructions for receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations, and receiving a second control message from the second wireless device indicating one or both of a first polarization of the plurality of polarizations to be used for transmitting one or more uplink communications or a second polarization of the plurality of polarizations to be used for transmitting one or more downlink communications.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include operations, features, means, or instructions for receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes, and receiving a second control message from the second wireless device indicating one or both of a first precoding scheme of the plurality of precoding schemes to be used for transmitting one or more uplink communications or a second precoding scheme of the plurality of precoding schemes to be used for transmitting one or more downlink communications.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include acts, features, means, or instructions for receiving control signaling indicating a first set of one or more LOS MIMO transmission modes to be used for one or more uplink communications, wherein the first set of one or more LOS MIMO transmission modes corresponds to uplink channel resources to be used for transmitting the one or more uplink communications, a transmission priority of the one or more uplink communications, a quality of service (QoS) threshold associated with the one or more uplink communications, a precoding scheme to be used for transmitting the one or more uplink communications, or a combination thereof.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include acts, features, means, or instructions for receiving control signaling indicating a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the second set of one or more LOS MIMO transmission modes corresponds to downlink channel resources to be used for transmitting the one or more downlink communications, a transmission priority of the one or more downlink communications, a QoS threshold associated with the one or more downlink communications, a precoding scheme to be used for transmitting the one or more downlink communications, or a combination thereof.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include acts, features, means, or instructions for receiving control signaling indicating a first set of one or more polarizations to be used for transmitting one or more uplink communications, a second set of one or more polarizations to be used for transmitting one or more downlink communications, or both.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include acts, features, means, or instructions for receiving control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used for one or more uplink communications, the pattern corresponding to a transport block size (TBS) of the one or more uplink communications, a QoS threshold associated with the one or more uplink communications, a priority level of the one or more uplink communications, a TCI state to be used for the one or more uplink communications, or a combination thereof.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include acts, features, means, or instructions for receiving control signaling indicating a pattern of LOS MIMO transmission modes to be used for one or more downlink communications, the pattern corresponding to a TBS of the one or more downlink communications, a QoS threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a TCI state to be used for the one or more downlink communications, or a combination thereof.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include acts, features, means, or instructions for receiving control signaling indicating an uplink repetition number for one or more uplink communications, a downlink repetition number for one or more downlink communications, a mapping between a first set of one or more LOS MIMO transmission modes and the uplink repetition number, a mapping between a second set of one or more LOS MIMO transmission modes and the downlink repetition number, or combinations thereof.

[0019] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving control signaling may include operations, features, means, or instructions for receiving one or more of a radio resource control (RRC) message or an instance of downlink control information (DCI) indicating uplink channel resources, downlink channel resources, a first set of one or more LOS MIMO transmission modes, a second set of one or more LOS MIMO transmission modes, or a combination thereof.

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for determining a rotation matrix based on a matching between a first antenna array of a first wireless device and a second antenna array of a second wireless device, and compensating one or more downlink communications, one or more uplink communications, or both based on the rotation matrix.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating one or more uplink communications and one or more downlink communications may include acts, features, means, or instructions for communicating the one or more uplink communications and one or more downlink communications in accordance with a Slepian-based precoding scheme or a Legendre-based precoding scheme.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating one or more uplink communications and one or more downlink communications may include acts, features, means, or instructions for communicating the one or more uplink communications and one or more downlink communications using a uniform linear array (ULA) structure, a uniform rectangular array (URA) structure, a uniform circular array (UCA) structure, or a uniform planar array (UPA) structure.

[0023] A method for wireless communication in a first wireless device is described. The method may include receiving a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communications; transmitting control signaling based on receiving the message from the second wireless device, the control signaling indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both; and communicating the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes and communicating the one or more downlink communications over the downlink channel resources in accordance with the second set of one or more LOS MIMO transmission modes based on the control signaling.

[0024] An apparatus for wireless communication in a first wireless device is described. The apparatus may include a processor, a memory coupled to the processor, and one or more instructions stored in the memory, wherein the one or more instructions cause the apparatus, based on the one or more instructions, to receive a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communications; transmit control signaling based on receiving the message from the second wireless device indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time, frequency, or both; communicate the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes based on the control signaling; The method is executable by the processor to communicate one or more downlink communications over the downlink channel resources according to a second set of MIMO transmission modes.

[0025] Another apparatus for wireless communication in a first wireless device is described. The apparatus may include means for receiving a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communications; means for transmitting control signaling based on receiving the message from the second wireless device, the control signaling indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both; and means for communicating the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes and communicating the one or more downlink communications over the downlink channel resources in accordance with the second set of one or more LOS MIMO transmission modes based on the control signaling.

[0026] A non-transitory computer-readable medium storing code for wireless communication in a first wireless device is described. The code may include instructions executable by a processor to: receive a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communications; transmit control signaling based on receiving the message from the second wireless device, the control signaling indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time, frequency, or both; and communicate the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes and communicate the one or more downlink communications over the downlink channel resources in accordance with the second set of one or more LOS MIMO transmission modes based on the control signaling.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include operations, features, means, or instructions for: transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources; and transmitting a second control message indicating a first channel resource pairing of the plurality of channel resource pairings including an uplink channel resource and a downlink channel resource.

[0028] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include operations, features, means, or instructions for transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of TCI states, and transmitting a second control message indicating one or both of a first TCI state to be used for one or more uplink communications or a second TCI state to be used for one or more downlink communications.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include operations, features, means, or instructions for transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations, and transmitting a second control message indicating one or both of a first polarization of the plurality of polarizations to be used for transmitting one or more uplink communications or a second polarization of the plurality of polarizations to be used for transmitting one or more downlink communications.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include operations, features, means, or instructions for transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes, and transmitting a second control message indicating one or both of a first precoding scheme of the plurality of precoding schemes to be used for transmitting one or more uplink communications or a second precoding scheme of the plurality of precoding schemes to be used for transmitting one or more downlink communications.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include acts, features, means, or instructions for transmitting control signaling indicating a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, wherein the first set of one or more LOS MIMO transmission modes corresponds to uplink channel resources to be used for transmitting the one or more uplink communications, a transmission priority of the one or more uplink communications, a QoS threshold associated with the one or more uplink communications, a precoding scheme to be used for transmitting the one or more uplink communications, or a combination thereof.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for transmitting the control signaling indicating a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the second set of one or more LOS MIMO transmission modes corresponds to downlink channel resources to be used for transmission of the one or more downlink communications, a transmission priority of the one or more downlink communications, a QoS threshold associated with the one or more downlink communications, a precoding scheme to be used for the one or more downlink communications, or a combination thereof.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include acts, features, means, or instructions for transmitting control signaling indicating a first set of one or more polarizations to be used for transmitting one or more uplink communications, a second set of one or more polarizations to be used for transmitting one or more downlink communications, or both.

[0034] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include acts, features, means, or instructions for transmitting control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used (e.g., at the transmitter or receiver) for one or more uplink communications, where the pattern corresponds to a TBS of the one or more uplink communications, a QoS threshold associated with the one or more uplink communications, a priority level of the one or more uplink communications, a TCI state to be used (e.g., at the transmitter or receiver) for the one or more uplink communications, or a combination thereof.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include acts, features, means, or instructions for transmitting control signaling indicating a pattern of LOS MIMO transmission modes to be used for one or more downlink communications, the pattern corresponding to a TBS of the one or more downlink communications, a QoS threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a TCI state to be used for the one or more downlink communications, or a combination thereof.

[0036] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include operations, features, means, or instructions for transmitting control signaling indicating an uplink repetition number for one or more uplink communications, a downlink repetition number for one or more downlink communications, a mapping between a first set of one or more LOS MIMO transmission modes and the uplink repetition number, a mapping between a second set of one or more LOS MIMO transmission modes and the downlink repetition number, or a combination thereof.

[0037] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting control signaling may include operations, features, means, or instructions for transmitting one or more of an RRC message or an instance of DCI indicating uplink channel resources, downlink channel resources, a first set of one or more LOS MIMO transmission modes, a second set of one or more LOS MIMO transmission modes, or a combination thereof.

[0038] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for determining an interference estimate based on the first set of one or more LOS MIMO transmission modes and the second set of one or more LOS MIMO transmission modes, and compensating one or more downlink communications, one or more uplink communications, or both based on the interference estimate. [Brief explanation of the drawings]

[0039] [Figure 1] 1 illustrates an example of a wireless communication system supporting full duplex for line-of-sight (LOS) multiple-input multiple-output (MIMO) in accordance with aspects of the present disclosure. [Figure 2] 1 illustrates an example of a wireless communication system supporting full duplex for line-of-sight (LOS) multiple-input multiple-output (MIMO) in accordance with aspects of the present disclosure. [Figure 3] 1 illustrates an example of an antenna array structure supporting full duplex for LOS MIMO, according to an embodiment of the present disclosure. [Figure 4A] 1 illustrates an example of a wireless communication system supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 4B] 1 illustrates an example of a wireless communication system supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 5A] 1 illustrates an example of transmission mode correlation supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 5B] 1 illustrates an example of transmission mode correlation supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 6A] 1 illustrates an example of a resource diagram supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 6B] 1 illustrates an example of a resource diagram supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 6C]1 illustrates an example of a resource diagram supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 7] 1 illustrates an example of a communication scheme supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 8A] 1 illustrates an example of a full-duplex configuration supporting full-duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 8B] 1 illustrates an example of a full-duplex configuration supporting full-duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 8C] 1 illustrates an example of a full-duplex configuration supporting full-duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 8D] 1 illustrates an example of a full-duplex configuration supporting full-duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 9] 1 illustrates an example of a wireless communication system supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 10] 1 illustrates an example process flow for supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 11] 1 illustrates a block diagram of a device supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 12] 1 illustrates a block diagram of a device supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 13] 1 illustrates a block diagram of a communications manager supporting full duplex for LOS MIMO, according to an aspect of the disclosure. [Figure 14] 1 illustrates a diagram of a system including a device supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 15] 1 illustrates a block diagram of a device supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 16] 1 illustrates a block diagram of a device supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 17] 1 illustrates a block diagram of a communications manager supporting full duplex for LOS MIMO, according to an aspect of the disclosure. [Figure 18] 1 illustrates a diagram of a system including a device supporting full duplex for LOS MIMO, according to an aspect of the present disclosure. [Figure 19] 1 shows a flowchart illustrating a method for supporting full duplex for LOS MIMO according to an aspect of the present disclosure. [Figure 20] 1 shows a flowchart illustrating a method for supporting full duplex for LOS MIMO according to an aspect of the present disclosure. [Figure 21] 1 shows a flowchart illustrating a method for supporting full duplex for LOS MIMO according to an aspect of the present disclosure. [Figure 22] 1 shows a flowchart illustrating a method for supporting full duplex for LOS MIMO according to an aspect of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0040] Some wireless communication systems may support line-of-sight (LOS) multiple-input multiple-output (MIMO) communication between wireless devices. For example, when there is an LOS channel between a first wireless device and a second wireless device (e.g., there are no obstacles between the first wireless device and the second wireless device) and the distance between the first wireless device and the second wireless device is below a threshold, the first wireless device and the second wireless device can communicate using an LOS MIMO communication scheme. Using LOS MIMO may enable the first wireless device and the second wireless device to achieve a higher multiplexing gain.

[0041] However, existing LOS MIMO schemes may be limited to half-duplex communication. That is, existing LOS MIMO schemes may not be suitable for full-duplex communication (e.g., communication involving simultaneous transmission and reception) between a first wireless device and a second wireless device. For example, when used for full-duplex communication, existing LOS MIMO schemes may result in higher self-interference (e.g., interference between simultaneous transmission and reception operations) and lower communication reliability. Therefore, using a conventional LOS MIMO scheme for full-duplex may reduce the likelihood of successful communication between the first wireless device and the second wireless device.

[0042] Aspects of the present disclosure provide for enabling full-duplex LOS MIMO communication. Specifically, techniques described herein provide for configuring wireless devices to perform full-duplex LOS MIMO communication using different transmission modes (e.g., antenna weighting schemes) and precoding schemes that result in reduced self-interference and higher signal quality. As an example, a first wireless device (e.g., user equipment (UE)) may transmit a capability message to a second wireless device (e.g., a base station). The capability message may indicate the first wireless device's capability to support full-duplex LOS MIMO communication (e.g., no support, partial support, or full support). The second wireless device may transmit control signaling to the first wireless device based on receiving the capability message. The control signaling may indicate a set of resources allocated for full-duplex LOS MIMO communication and a set of transmission modes to be used for full-duplex LOS MIMO communication.

[0043] The transmission modes indicated by the control signaling may correspond to different precoding schemes (e.g., singular value decomposition (SVD) precoding schemes) that reduce inter-layer interference at the first wireless device. Thus, the first wireless device and the second wireless device may perform full-duplex MIMO communication over a set of resources according to the set of transmission modes indicated by the control signaling. The techniques described herein may enable the first wireless device and the second wireless device to achieve higher throughput levels (e.g., by performing simultaneous transmission and reception) and higher multiplexing gains (e.g., by using LOS MIMO) without reducing the reliability of communication between the first wireless device and the second wireless device.

[0044] Aspects of the present disclosure are initially described in the context of wireless communication systems, antenna array structures, transmission mode correlations, resource diagrams, communication schemes, full-duplex configurations, and process flows. Aspects of the present disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts for full-duplex for LOS MIMO.

[0045] 1 illustrates an example of a wireless communication system 100 supporting full-duplex for LOS MIMO in accordance with an aspect of the present disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable communications, low-latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0046] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may be devices of different types or with different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base stations 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support communication of signals according to one or more radio access technologies.

[0047] The UEs 115 may be dispersed throughout the wireless communication system 100, and each UE 115 may be fixed or mobile. The UEs 115 may also be referred to as mobile devices, wireless devices, remote devices, handheld devices, or subscriber devices, or some other suitable terminology, and a "device" may also be referred to as a unit, station, terminal, or client. The UE 115 may be a device such as a cellular phone, a smartphone, a personal digital assistant (PDA), a multimedia / entertainment device (e.g., a radio, MP3 player, video device), a camera, a game console, a navigation / positioning device (e.g., a Global Navigation Satellite System (GNSS) device, e.g., based on Global Positioning System (GPS), Beidou, GLONASS, or Galileo, a ground-based device), a tablet computer, a laptop computer, a netbook, a smartbook, a personal computer, a smart device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, virtual reality goggles, smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet)), a drone, a robot / robotic device, a vehicle, a vehicular device, a meter (e.g., a parking meter, an electric meter, a gas meter, a water meter), a monitor, a gas pump, a home appliance (e.g., a kitchen appliance, a washer, a dryer), a location tag, a medical / healthcare device, an implant, a sensor / actuator, a display, or any other suitable device configured to communicate over a wireless or wired medium.In some examples, UE 115 may also refer to a wireless local loop (WLL) station, an Internet of Everything (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, which may be implemented in various items such as an appliance, a drone, a robot, a vehicle, a meter, etc.

[0048] The base stations 105 may communicate with the core network 130, or with each other, or both. For example, the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an S1, N2, N3, or other interface). The base stations 105 may communicate with each other via the backhaul links 120 (e.g., via an X2, Xn, or other interface), either directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130), or both. In some examples, the backhaul links 120 may be or include one or more wireless links.

[0049] One or more of the base stations 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 giga-NodeB (any of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

[0050] The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may act as relays, as shown in FIG. 1, as well as base stations 105 and network equipment, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among various examples.

[0051] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier used for the communication link 125 may include a portion (e.g., a bandwidth part (BWP)) of a radio frequency spectrum band operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling coordinating operation on the carrier, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using 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 can be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.

[0052] The communication links 125 shown in the wireless communication system 100 may include uplink transmissions from the UE 115 to the base station 105 or downlink transmissions from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry downlink and uplink communications (e.g., in TDD mode).

[0053] 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 carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths for a particular radio access technology carrier (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). A device (e.g., a base station 105, a UE 115, or both) of the wireless communication system 100 may have a hardware configuration that supports communication over a particular carrier bandwidth or may be configurable to support communication over one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication over carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over a portion (e.g., a sub-band, BWP) or all of the carrier bandwidth.

[0054] A signal waveform transmitted on a carrier may be composed of 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)). In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE 115. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase data rates or data integrity for communications with UE 115.

[0055] One or more numerologies for a carrier may be supported, and a numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs with the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communication for the UE 115 may be limited to one or more active BWPs.

[0056] The time interval for the base station 105 or the UE 115 is, for example, T s =1 / (Δf max N f) seconds, and Δf max may represent the maximum supported subcarrier spacing, and N f may represent the maximum supported discrete Fourier transform (DFT) size. The communication resource time intervals may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0057] Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into several slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on the subcarrier spacing. Each slot may include several symbol periods (e.g., depending on the length of a cyclic prefix prepended to each symbol period). In some wireless communication systems, a slot may be further divided into multiple minislots, each containing one or more symbols. Excluding the cyclic prefix, each symbol period may include one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the frequency band of operation.

[0058] A subframe, slot, minislot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0059] Physical channels may be multiplexed on carriers according to various techniques. Physical control channels and physical data channels may be multiplexed on downlink carriers using, for example, one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth of the carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search the control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for control channel candidates may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for sending control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0060] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0061] In some examples, the base stations 105 may be mobile and therefore may provide communication coverage to moving geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include a heterogeneous network, for example, where different types of base stations 105 provide coverage to various geographic coverage areas 110 using the same or different radio access technologies.

[0062] The wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and transmissions from different base stations 105 may, in some instances, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operation.

[0063] 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 technologies that enable devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that incorporate sensors or meters to measure or capture information and relay that information to a central server or application program that can utilize the information or present the information to a human who interacts with the program or application. Some UEs 115 may be designed to collect information or enable automated behavior of machinery. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security detection, physical access control, and transaction-based business billing. In one aspect, the techniques disclosed herein may be applicable to MTC UEs or IoT UEs. An MTC UE or IoT UE may include an MTC / enhanced MTC (eMTC, also called category (CAT)-M, CAT M1) UE, an NB-IoT (also called CAT NB1) UE, and other types of UE. eMTC and NB-IoT may refer to future technologies that may evolve from or be based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (further enhanced eMTC), and mMTC (massive MTC), and NB-IoT may include eNB-IoT (enhanced NB-IoT) and FeNB-IoT (further enhanced NB-IoT).

[0064] Some UEs 115 may be configured to employ operating modes that reduce power consumption, 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 at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communication, operating over a limited bandwidth (e.g., pursuant to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured for operation using a narrowband protocol type associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0065] The wireless communication system 100 may be configured to support ultra-reliable or low-latency communications, or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communications (URLLC). The UE 115 may be designed to support ultra-reliable, low-latency, or critical functionality. Ultra-reliable communications may include private or group communications and may be supported by one or more services such as push-to-talk, video, data, etc. Support for ultra-reliable, low-latency functionality may include service prioritization, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.

[0066] In some examples, the UE 115 may also be able to communicate directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) protocol or a D2D protocol). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105 or may in some cases be unable to receive transmissions from the base station 105. In some examples, a group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system in which each UE 115 transmits to all other UEs 115 in the group. In some examples, the base station 105 facilitates scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without the involvement of the base station 105.

[0067] In some systems, the D2D communication link 135 may be an example of a communication channel between vehicles (e.g., UEs 115), such as a sidelink communication channel. In some examples, the vehicles may communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination thereof. The vehicles may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with a network via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communication, or both.

[0068] 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) or a 5G core (5G core, 5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (PDN gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnects to external networks. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be forwarded through a user plane entity, which may provide IP address allocation and other functions. The user plane entity may connect to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, an intranet, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0069] Some of the network devices, such as the base stations 105, may include subcomponents, such as an access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with the UE 115 through one or more other access network transmitting entities 145, which may be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transmitting entity 145 may include one or more antenna panels. In some configurations, various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or integrated into a single network device (e.g., the base station 105).

[0070] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The 300 MHz to 3 GHz region is commonly known as the ultra-high frequency (UHF) region or decimeter band because wavelengths range in length from approximately 1 decimeter to 1 meter. Although UHF waves may be blocked or redirected by buildings and environmental features, the waves can penetrate structures sufficiently for a macrocell to provide service to UEs 115 located indoors. Transmission of UHF waves may involve smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmissions using lower frequencies and longer waves in the shortwave (high frequency (HF)) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0071] The wireless communication system 100 may also operate in the super high frequency (SHF) region, also known as the centimeter band, using the frequency band from 3 GHz to 30 GHz, or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known 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 on each device may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, propagation of EHF transmissions may experience greater atmospheric attenuation and shorter distances than SHF or UHF transmissions. The techniques disclosed herein may be employed over transmissions using one or more different frequency ranges, and the designated use of bands across these frequency ranges may vary by country or regulatory body.

[0072] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may utilize License Assisted Access (LAA), LTE-Unlicensed (LTE-U), or NR technology in an unlicensed band, such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency spectrum band, devices such as the base station 105 and the UE 115 may utilize carrier sensing for collision detection and avoidance. In some examples, operation in an unlicensed band may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operation in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0073] In some examples, the base station 105 or the UE 115 may be equipped with multiple antennas, which may be used to utilize techniques such as transmit diversity, receive diversity, MIMO communications, or beamforming. The antennas of the base station 105 or the UE 115 may be located in one or more antenna arrays or antenna panels, which may support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be collocated in an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located in various geographic locations. The base station 105 may have an antenna array with several rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays, which may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted through the antenna ports.

[0074] A base station 105 or a UE 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques are sometimes referred to as spatial multiplexing. Multiple signals may be transmitted by a transmitting device, for example, via different antennas or different combinations of antennas. Similarly, multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits related to the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0075] Beamforming, sometimes referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming may be achieved by combining signals communicated through antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjusting signals communicated through antenna elements may include the transmitting or receiving device applying an amplitude offset, a phase offset, or both to signals carried through the antenna element associated with the device. The adjustment associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., relative to the antenna array of the transmitting or receiving device, or to some other orientation).

[0076] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform a beamforming operation for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by the base station 105 multiple times in different directions. For example, the base station 105 may transmit signals according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used (e.g., by a transmitting device such as the base station 105 or by a receiving device such as the UE 115) to identify beam directions for later transmissions or receptions by the base station 105.

[0077] Some signals, such as data signals associated with a particular receiving device, may be transmitted by the base station 105 in a single beam direction (e.g., a direction associated with a receiving device, such as the UE 115). In some examples, the beam direction associated with transmission along the single beam direction may be determined based on signals transmitted in one or more beam directions. For example, the UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with the highest signal quality or, in some cases, acceptable signal quality.

[0078] In some examples, transmission by a device (e.g., by the base station 105 or the UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the base station 105 to the UE 115). The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)) that may or may not be precoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted by the base station 105 in one or more directions, the UE 115 may employ similar techniques to transmit a signal multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by the UE 115) or to transmit a signal in a single direction (e.g., to transmit data to a receiving device).

[0079] A receiving device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals, such as synchronization signals, reference signals, beam selection signals, or other control signals, from the base station 105. For example, the receiving device may attempt multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of the antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as “listening” with different receive configurations or receive directions. In some examples, the receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned to a beam direction determined based on listening with different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or possibly acceptable signal quality based on listening with multiple beam directions).

[0080] The wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly for communications on logical channels. The Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels onto transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer and improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may establish, configure, and maintain an RRC connection between the UE 115 and the base station 105 or core network 130, which supports radio bearers for user plane data. In the physical layer, transport channels may be mapped to physical channels.

[0081] The UE 115 and the base station 105 may support retransmission of data to increase the likelihood of successful reception of the data. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data will be correctly received over the 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 may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, in which the device may provide HARQ feedback in a particular slot for data received in a previous symbol within that slot. In other cases, the device may provide HARQ feedback in a subsequent slot or according to some other time interval.

[0082] Some wireless communication systems may support LOS MIMO and massive MIMO. LOS MIMO may be based on a Rician channel model, where the LOS percentage is a 2 The Rician channel model for LOS MIMO can be derived using Equations 1-3. In Equation 1, a is the LOS component, b is the non-LOS component, H is the channel matrix, and H LOS is the LOS channel matrix, and H NLOS is the non-LOS channel matrix. In Equation 2, r jk is the distance between the receiving antenna element at the receiving device and the transmitting antenna element at the transmitting device, and λ is the wavelength of the signal transmitted by the transmitting device.

[0083] Circular one-dimensional (1D) or two-dimensional (2D) antenna arrays may be used for LOS MIMO, while 1D or 2D antenna arrays may be used for massive MIMO. LOS MIMO may involve a large (e.g., strong) LOS component (e.g., when a is greater than 0.9 and b is less than 0.1, such that the LOS component occupies more than 90% of the equivalent channel), while massive MIMO may involve a smaller (e.g., weaker) LOS component (e.g., when a is less than b). LOS MIMO may involve an implicit SVD-based precoder, which may be based on a specific channel structure with limited or no channel state feedback. In contrast, massive MIMO may utilize an explicit SVD-based precoder, and channel state feedback may be required at the transmit side to calculate this SVD-based precoder.

[0084]

number

[0085] Aspects of the present disclosure may enable devices (e.g., base stations, UEs, relay nodes) to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable devices to perform simultaneous transmission and reception using specific combinations of LOS MIMO transmission modes (e.g., orbital angular momentum (OAM) mode, singular mode) that result in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operations, which may increase the likelihood that devices will successfully perform full-duplex LOS MIMO communications.

[0086] 2 illustrates an example of a wireless communication system 200 supporting full-duplex for LOS MIMO in accordance with aspects of the present disclosure. The wireless communication system 200 may implement or be implemented by aspects of the wireless communication system 100. For example, the wireless communication system 200 may include a base station 105-a and a UE 115-a, which may be examples of corresponding devices described with reference to FIG. 1. The base station 105-a and the UE 115-a may communicate within a geographic coverage area 110-a, which may be an example of the geographic coverage area 110 described with reference to FIG. 1. In the wireless communication system 200, the UE 115-a may perform full-duplex communication with the base station 105-a in accordance with a LOS MIMO communication scheme.

[0087] The wireless communication system 200 may have specific conditions for uplink and downlink multiplexing in the LOS MIMO mode. For example, the wireless communication system 200 may have conditions for achieving sufficient isolation between the uplink and downlink. These conditions may include a large LOS component (e.g., when a is greater than b in Equation 1) and a synchronization timeline (e.g., whether the time misalignment between the downlink and uplink is within the cyclic prefix (CP)). If the misalignment between the downlink and uplink is within the CP, the impact of inter-symbol interference (ISI) may be limited. The wireless communication system 200 may support techniques for reducing misalignment in full-duplex mode by applying an extended CP and a fractional timing advance (TA). Physical alignment between the transmit and receive arrays of the base station 105-a and the UE 115-a may be a prerequisite for achieving sufficient isolation between the uplink and downlink. Alternatively, if there is a mismatch between the transmit and receive arrays of base station 105-a and UE 115-a, the mismatch may be compensated for in LOS MIMO operation.

[0088] In the following description of the wireless communication system 200, it is assumed that the transmit and receive arrays of the base station 105-a and the UE 115-a are aligned, or that mismatch between the transmit and receive arrays of the base station 105-a and the UE 115-a is estimated and compensated for to achieve LOS MIMO multiplexing gain. For example, compensation for x-axis or y-axis rotation can be achieved by updating the precoding matrix and the combining matrix. Using multiple panels or TRPs can improve isolation between the uplink and downlink. In some cases, mismatch compensation can be performed per panel or per TRP.

[0089] The wireless communications system 200 may support mapped modes for the downlink and uplink, which may generally apply to both OAM and singular modes (e.g., SVD modes) for uniform linear array (ULA) and uniform rectangular array (URA) antenna structures. These mapped modes, also referred to herein as LOS MIMO modes or transmission modes, may be utilized for full-duplex sessions between the base station 105-a (e.g., TRP) and the UE 115-a (e.g., relay device). In the case of a dynamic physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH), the base station 105-a may indicate the mode used for the downlink and the mode used for the uplink when scheduling downlink control information (DCI). For configured grant uplink or semi-persistent scheduled (SPS) downlink transmissions, the base station 105-a may indicate these modes in the per-SPS RRC configuration or configured grant configuration (e.g., per index), or in the activation or deactivation DCI (e.g., for SPS and configured grant type 2). The base station 105-a may also indicate the mode to be used by the UE for transmission of uplink control information (UCI). These signals may be transmitted in a single mode or in multiple modes repeating the same signal. Alternatively, the mode used for physical downlink control channel (PDCCH) transmissions, such as DCI, may be predefined.

[0090] The following description of the wireless communication system 200 may generally apply to both OAM and single modes for ULA and URA architectures and may illustrate how the base station 105-a determines the mapping of modes to uplink or downlink. In some examples, the base station 105-a may determine the mapping based on channel pairing in full duplex. This channel pairing may be channel-dependent. For example, channel pairing of a PDSCH and a physical uplink control channel (PUCCH) may be associated with a higher detectability compared to channel pairing of a PDSCH and a PUSCH. The base station 105-a may assign modes based on a threshold isolation level between scheduled channels and a threshold detection signal-to-interference-and-noise ratio (SINR). The mapping may also be based on transmission priority or QoS. For example, the base station 105-a may associate a particular mode pattern with a particular priority. For SPS transmissions and configured grant-based transmissions, this priority may be configured via RRC and may not change with DCI. Thus, the configuration may be semi-static. Other constraints, such as the type of precoder used and open-loop or closed-loop operation, may also be considered when determining this mapping.

[0091] The base station 105-a can also indicate to the UE 115-a how to use the OAM mode for uplink repetition or downlink repetition. That is, the base station 105-a can map the repetition to a pattern of modes. For example, a repetition sequence for uplink or downlink communication can be mapped to a sequence of modes, with each repetition being communicated using a respective mode in the sequence of modes. Additionally or alternatively, the base station 105-a can define multiple patterns of mode assignment and parameterize these patterns based on transport block size (TBS), QoS threshold, or transmission priority. Accordingly, the base station 105-a can signal a pattern index to the UE 115-a via DCI. Alternatively or additionally, the UE 115-a can determine this pattern based on predefined rules, transmission priority, or TBS, among other examples. The mode pattern used for the uplink and downlink can also depend on the active transmission set indication (TCI) state of the UE 115-a or the base station 105-a. That is, the selection of the uplink or downlink beam can affect the mode allocation.

[0092] The base station 105-a may also consider different polarization states (e.g., antenna polarization) and power constraints when determining the mapping. For example, different LOS MIMO modes may be indicated or defined for each polarization. Different polarizations may be used to improve isolation between the uplink and downlink. As an example, the base station 105-a may assign different LOS MIMO modes for the downlink and uplink, and the LOS MIMO modes assigned for the downlink and uplink may correspond to different polarizations. That is, the downlink LOS MIMO mode may be mapped to a first polarization (e.g., horizontal polarization), while the uplink LOS MIMO mode may be mapped to a second polarization (e.g., vertical polarization). The base station 105-a may consider both the LOS MIMO mode and polarization when scheduling communication with the UE 115-a. In some examples, LOS MIMO modes with lower isolation may be used with different polarizations, which may increase the likelihood of successful communication when using these modes. The base station 105-a can also improve the power allocation across the modes and selected polarizations to achieve the desired downlink and uplink performance (e.g., target throughput or block error rate (BLER)).

[0093] In the case of in-band full duplex (IBFD), the main source of interference may be linear interference caused by the signal transmitted by the base station 105-a. In such an example, the base station 105-a may estimate the correlation between the LOS MIMO modes and obtain information related to the transmitted signal. Thus, the base station 105-a (e.g., a full-duplex node) may construct and cancel this interference based on the correlation between the LOS MIMO modes. Specifically, the base station 105-a may construct and cancel this interference using Equation 4: where y is the signal received by the receiving device (e.g., the base station 105-a),

[0094]

number

[0095]

number

[0096]

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[0097]

number

[0098] In the example of FIG. 2, the UE 115-a may transmit a capability message 205 indicating the UE 115-a's ability to support full-duplex LOS MIMO communication. In response to (e.g., following receiving) the capability message 205, the base station 105-a may transmit control signaling 210 to the UE 115-a. For example, the base station 105-a may transmit the control signaling 210 to the UE 115-a after (e.g., based on) receiving the capability message 205 from the UE 115-a. The control signaling 210 may indicate uplink resources, downlink resources, and an LOS MIMO transmission mode to be used for full-duplex communication between the base station 105-a and the UE 115-a. Thus, the base station 105-a transmits downlink communication 220 to the UE 115-a while simultaneously receiving uplink communication 215 from the UE 115-a. For example, the base station 105-a may transmit downlink communications 220 using a first set of one or more LOS MIMO communication modes (e.g., an SVD precoding scheme), and the UE 115-a may transmit uplink communications 215 using a second set of one or more LOS MIMO communication modes. The combination of the first set of LOS MIMO communication modes and the second set of one or more LOS MIMO communication modes may result in reduced interference at the UE 115-a and the base station 105-a for full-duplex communication.

[0099] The wireless communication system 200 may enable the base station 105-a and the UE 115-a to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable the base station 105-a and the UE 115-a to perform simultaneous transmission and reception using a particular combination of transmission modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operation, which may increase the likelihood that the base station 105-a and the UE 115-a will successfully perform full-duplex LOS MIMO communications.

[0100] 3 illustrates an example of an antenna array structure 300 supporting full-duplex for LOS MIMO in accordance with aspects of the present disclosure. The antenna array structure 300 may implement or be implemented by aspects of wireless communication system 100 or wireless communication system 200. For example, the antenna array structure 300 may implement or be implemented by a UE or a base station, which may be examples of the corresponding devices described with reference to FIGS. 1 and 2. The antenna array structure 300 may illustrate an example of a LOS MIMO channel between a transmit antenna array 305 and a receive antenna array 310.

[0101] The antenna array structure 300 may support higher LOS MIMO multiplexing gain, among other benefits. Specifically, the structure of the LOS MIMO channel may be exploited to achieve high multiplexing gain. This LOS MIMO gain decreases with distance, and the multiplexing gain may be negligible at a threshold distance (e.g., 1000 lambda, which may be approximately 85 m for 3.5 GHz). The distance at which maximum LOS MIMO multiplexing gain occurs may depend on the product of the transmit and receive antenna apertures. This multiplexing gain may also be related to a spectral efficiency factor (e.g., log2(1+Nr * SNR), where Nr refers to the number of receive antenna elements. The spectral efficiency factor may indicate the spatial multiplexing gain.

[0102] As described herein, a wireless device may be capable of compensating for x-axis or y-axis rotation. This compensation may include far-field simplifications. For example, the compensation may be performed on the x-axis rotation component γ∈[0 2π] (e.g., γ for the transmitter and receiver). Tx and γ Rx ) and y-axis rotation component β∈[0 2π] (e.g., β for the transmitter and receiver) Tx and β Rx). A simplification is to use approximations for small angles and large distances, estimate the rotation parameters (e.g., and ) locally, and use the rotation matrix (e.g., R Tx or R Rx and construct the precoder matrix (e.g., V new ) and update the receiving post-processor matrix (e.g., U new ) can be derived by updating the x-axis and y-axis rotations. The x-axis and y-axis rotations can be compensated for separately at the transmitter and receiver (e.g., using beam steering). Receiver compensation can also be done implicitly using a minimum mean square error (MMSE) receiver. This compensation can be calculated according to Equations 5-7.

[0103]

number

[0104] In the example of FIG. 3 , a first device may perform full-duplex LOS MIMO communication with a second device. The first device may employ a transmit antenna array 305, and the second device may employ a receive antenna array 310. The transmit antenna array 305 may be separated from the receive antenna array 310 by a distance 325 (e.g., r). The transmit antenna array 305 of the first device may include multiple antennas, such as antenna 315-a. Similarly, the receive antenna array 310 of the second device may include multiple antennas, such as antenna 315-b. The LOS channel matrix between the first device and the second device may be calculated according to Equation 5, where d mn represents the distance 320 between the antenna 315-a and the antenna 315-b. k is the orientation of the transmit antenna array 305 (e.g.,

[0105]

number

[0106]

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[0107] The antenna array structure 300 may enable devices (e.g., base stations, UEs, relay nodes) to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable devices to perform simultaneous transmission and reception using a particular combination of transmission modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operations, which may increase the likelihood that devices will successfully perform full-duplex LOS MIMO communications.

[0108] 4A and 4B illustrate examples of wireless communication systems 400 and 401 supporting full-duplex for LOS MIMO in accordance with an aspect of the present disclosure. Wireless communication systems 400 and 401 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, or antenna array structure 300. For example, wireless communication systems 400 and 401 may include base station 105-b, base station 105-c, UE 115-b, UE 115-c, and UE 115-d, which may be examples of corresponding devices described with reference to FIGS. 1 to 3. In wireless communication systems 400 and 401, base station 105 may perform full-duplex communication with UE 115 in accordance with a LOS MIMO communication scheme.

[0109] LOS MIMO can provide high multiplexing gain under certain conditions. For example, when the distance between the transmit and receive arrays is less than a certain distance threshold that depends on the apertures of the transmit and receive arrays and the carrier frequency used. Accurate LOS MIMO precoding can be based on channel information, distance, feedback, and mismatch compensation available at the transmitter, among other examples. There can be multiple deployment scenarios with different constraints, which can include LOS MIMO for the backhaul link between the base station and relay (e.g., integrated access and backhaul (IAB) node, smart repeater, customer premises equipment (CPE)), and LOS MIMO for the access link between the base station or TRP and the UE.

[0110] As described herein, different precoder designs may be associated with different feedback overhead levels. Aspects of the present disclosure may provide a codebook-based precoder that supports higher LOS MIMO multiplexing gain. Some precoders, such as SVD-based precoders, may be based on full channel information and high overhead. Other precoders may be derived based on limited feedback. The techniques described herein may be based on codebook-based precoders and may be applicable to scenarios with limited feedback and no sounding or limited sounding capability (e.g., as opposed to full spatial sounding). The described techniques may be applicable to matched transmit and receive arrays, or to nodes with mismatch estimation and compensation capabilities (e.g., distance and mismatch feedback), and to devices with relatively low mobility (e.g., semi-static receive orientation).

[0111] Aspects of the present disclosure may support the use of open-loop precoders for LOS MIMO. If a transmitting node has limited or no feedback from a receiving node, the transmitting node may not be able to accurately estimate the channel to derive a precoder. For semi-open-loop operation (e.g., with known receive and transmit array configurations), it may be difficult to achieve high LOS MIMO multiplexing gain. That is, without knowledge of the transmit and receive array configurations (e.g., without a universal precoder), it may be difficult to achieve high multiplexing gain in fully open-loop operation. The techniques described herein may be applicable to receiving nodes with no or limited sounding capabilities (e.g., smart repeaters with limited mobile termination (MT) capabilities), devices with aligned transmit and receive arrays, or devices with mismatch estimation and compensation capabilities. Open-loop precoders may also be used to reduce sounding overhead for large receive arrays and for low-complexity operation (e.g., when the overhead of alignment estimation is smaller than the sounding overhead).

[0112] In the example of FIG. 4A , the base station 105-b may be capable of performing full-duplex LOS MIMO communication with the UE 115-b via a first access link. The base station 105-b may also be capable of performing LOS MIMO communication with a relay device 405-a (e.g., an IAB node, a relay node, a CPE) via a first backhaul link. In addition, the relay device 405-a may be capable of performing full-duplex LOS MIMO communication with the UE 115-c via a second access link. In the example of FIG. 4B , the base station 105-c may be capable of performing full-duplex communication with the relay node 405-b via a second backhaul link, and the relay node 405-b may be capable of performing full-duplex communication with the UE 115-d via a third access link. However, the base station 105-c may not be able to perform full-duplex LOS MIMO communication with the UE 115-d due to an obstruction 410 between the UE 115-d and the base station 105-c.

[0113] The wireless communication system 400 and the wireless communication system 401 may enable the base station 105, the UE 115, and the relay node 405 to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable the UE 115, the base station 105, and the relay node 405 to perform simultaneous transmission and reception using a particular combination of transmit LOS MIMO modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmit modes may result in greater separation between uplink and downlink operation, which may increase the likelihood that the UE 115, the base station 105, and the relay node 405 will successfully perform full-duplex LOS MIMO communications.

[0114] 5A and 5B illustrate example transmission mode correlations 500 and 501 supporting full duplex for LOS MIMO in accordance with aspects of the present disclosure. Transmission mode correlations 500 and 501 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, antenna array structure 300, wireless communication system 400, or wireless communication system 401. For example, transmission mode correlations 500 and 501 may implement or be implemented by a base station or a UE, which may be examples of the corresponding devices described with reference to FIGS. 1-4. Transmission mode correlations 500 and 501 illustrate different combinations of LOS MIMO transmission modes that result in different levels of inter-layer interference.

[0115] Aspects of the present disclosure may support the use of a Legendre-based precoding scheme for full-duplex LOS MIMO communications. The Legendre-based precoder may reduce inter-layer interference because any two consecutive layers may be orthogonal (e.g., layer 1 and layer 2 may be orthogonal). The described techniques may be applied to a URA antenna structure in which Nt (e.g., the number of transmit array elements) is less than Nr (e.g., the number of receive antenna elements). When Nr is greater than Nt, the processing gain and SINR may be high because a large Nr may compensate for several precoders.

[0116] The described techniques may support mode separation for open-loop LOS MIMO using a ULA antenna structure. For a ULA, the Slepian or Legendre-based precoder may include a Slepian or Legendre precoder for transmit and receive arrays where Nt is less than Nr, and a block-Slepian or block-Legendre precoder for transmit and receive arrays where Nt is greater than Nr. According to aspects of the present disclosure, a full-duplex base station, relay, or UE using a ULA may use a Slepian or Legendre-based precoder to precode downlink and uplink signals. Slepian and Legendre-based precoders can provide approximate orthogonality between even and odd modes. These odd and even modes do not need to be shared between the downlink and uplink to ensure sufficient isolation between the uplink and downlink. For example, modes 0, 2, and 4 may be used for the uplink, and modes 1, 3, and 5 may be used for the downlink (or vice versa).

[0117] The described techniques may also support mode separation for open-loop LOS MIMO using UPA. In the case of UPA, the Kronecker product of two 1D precoders may be used. For example, the Kronecker product of Slepian or Legendre precoders for the transmit and receive arrays, where Nt_x (e.g., the number of x-axis transmit antenna elements) is less than or equal to Nr_x (e.g., the number of x-axis receive antenna elements) and Nt_y (e.g., the number of y-axis transmit antenna elements) is less than or equal to Nr_y (e.g., the number of y-axis receive antenna elements). According to examples described herein, a full-duplex base station, relay, or UE using UPA may use Slepian- or Legendre-based precoders for downlink and uplink signals. There may be approximate orthogonality between even and odd modes. In addition, due to the Kronecker product structure of the precoder, there may be orthogonality between blocks of modes. In some examples, odd and even modes may be used to ensure sufficient isolation between the uplink and downlink. In another example, odd and even blocks of modes (eg, corresponding to rows of a precoding matrix) may be used to make the downlink and uplink orthogonal.

[0118] Transmission mode correlation 500 and transmission mode correlation 501 may indicate correlations between LOS MIMO modes (e.g., singular modes) for a channel precoded using a LOS MIMO precoder. More specifically, transmission mode correlation 500 and transmission mode correlation 501 may be used to calculate the Gram matrix (e.g.,

[0119]

number

[0120]

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[0121]

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[0122] 5A shows an example of a 1D precoding matrix. Each column and row of the 1D precoding matrix can represent a different LOS MIMO communication mode. For example, matrix position 505-a may indicate that a first LOS MIMO communication mode (e.g., mode 1) is used for transmission and a fourth LOS MIMO communication mode (e.g., mode 4) is used for reception (or vice versa). Similarly, matrix position 505-b may indicate that a seventh LOS MIMO communication mode (e.g., mode 7) is used for transmission and an eighth LOS MIMO communication mode (e.g., mode 8) is used for reception (or vice versa). The value of each matrix position may be determined according to Equation 8, which represents an interference level between the respective LOS MIMO communication modes indicated by the matrix position. For example, the value of matrix position 505-a may correspond to an interference level between the first LOS MIMO communication mode and the fourth LOS MIMO communication mode.

[0123] 5B shows an example of a 2D precoding matrix that may include blocks 510 of LOS MIMO transmission modes. For example, the 2D precoding matrix may include a first block 510-a of LOS MIMO transmission modes (e.g., modes 1-4) and a second block 510-b of LOS MIMO transmission modes (e.g., modes 13-16). As shown in the example of FIG. 5B, there may be orthogonality between different blocks 510 of the 2D precoding matrix, which may result in lower inter-layer interference. There may also be orthogonality between even and odd LOS MIMO transmission modes within each of the blocks 510, which may provide additional isolation between uplink and downlink operation.

[0124] Transmission mode correlation 500 and transmission mode correlation 501 may enable devices (e.g., base stations, UEs, relay nodes) to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable devices to perform simultaneous transmission and reception using a particular combination of transmission modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operations, which may increase the likelihood that devices will successfully perform full-duplex LOS MIMO communications.

[0125] 6A, 6B, and 6C illustrate example resource diagrams 600, 601, and 602 supporting full duplex for LOS MIMO in accordance with aspects of the present disclosure. Resource diagrams 600, 601, and 602 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, antenna array structure 300, wireless communication system 400, wireless communication system 401, transmission mode correlation 500, or transmission mode correlation 501. For example, resource diagrams 600, 601, and 602 may implement or be implemented by a UE or a base station, which may be examples of the corresponding devices described with reference to FIGS. 1-5. Resource diagrams 600, 601, and 602 may illustrate an in-band full duplex communication scheme with full overlap, an in-band full duplex communication scheme with partial overlap, and a sub-band full duplex communication scheme.

[0126] Aspects of the present disclosure can support various full-duplex communication schemes, such as IBFD and sub-band full-duplex (SBFD). In IBFD, transmit and receive operations may occur on the same time and frequency resources. That is, the downlink and uplink may utilize the same IBFD time and frequency resources (e.g., fully overlapping or partially overlapping). In the case of sub-band full-duplex (e.g., flexible full-duplex), transmission and reception may occur simultaneously but on different frequency resources. Downlink resources may be separated from uplink resources in the frequency domain.

[0127] FIG. 6A illustrates an example of an IBFD communication scheme with complete overlap between uplink and downlink resources. For example, uplink resource 605-a may completely overlap with downlink resource 610-a in frequency and time. FIG. 6B illustrates an example of IBFD communication with partial overlap between uplink and downlink resources. For example, uplink resource 605-b may partially overlap with downlink resource 610-b in time and frequency. FIG. 6C illustrates an example of an SBFD communication scheme with no frequency overlap between uplink and downlink resources. For example, uplink resource 605-c may not overlap with downlink resource 610-c in frequency. However, if there is a guard band 615 configured between uplink resource 605-c and downlink resource 610-c, uplink resource 605-c may overlap with downlink resource 610-c in time.

[0128] Resource diagram 600, resource diagram 601, and resource diagram 602 may enable devices (e.g., base stations, UEs, relay nodes) to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable devices to perform simultaneous transmission and reception using a particular combination of transmission modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operations, which may increase the likelihood that devices will successfully perform full-duplex LOS MIMO communications.

[0129] 7 illustrates an example of a communication scheme 700 supporting full-duplex for LOS MIMO in accordance with an aspect of the present disclosure. The communication scheme 700 may implement or be implemented by aspects of the wireless communication system 100, the wireless communication system 200, the antenna array structure 300, the wireless communication system 400, the wireless communication system 401, the transmission mode correlation 500, the transmission mode correlation 501, the resource diagram 600, the resource diagram 601, or the resource diagram 602. For example, the communication scheme 700 may implement or be implemented by a UE or a base station, which may be examples of the corresponding devices described with reference to FIGS. 1-6. The communication scheme 700 illustrates an antenna panel 710 supporting full-duplex operation.

[0130] The example of Figure 7 shows an example of a base station that supports full-duplex communication. Aspects of the present disclosure may support self-interference mitigation in a base station. For improved isolation (e.g., greater than 50 dB), an architecture including two separate panels for simultaneous transmit and receive operation may be used. A first panel may be used for downlink transmission at both edges of the frequency band, and a second panel may be used for uplink reception in the center of the frequency band. To achieve greater than 40 dB of isolation using sub-band full duplex, the downlink and uplink may be allocated to different portions of the frequency band.

[0131] Additionally or alternatively, a guard band may be included between the uplink and downlink. Receive-side weighted overlap and add (WOLA) may also be used to reduce the adjacent channel leakage ratio (ACLR) corresponding to the uplink signal. An analog low pass filter (LPF) may also be used to improve the base station's analog digital converter (ADC) dynamic range. The described techniques may support improvements to the receiver-side automatic gain control (AGC) state, which may provide noise figure (NF) improvements. Digital interference cancellation (IC) may also reduce ACLR leakage by more than 20 dB using a nonlinear model for each transmit-receive pair.

[0132] In the example of Figure 7, the base station utilizes antenna panel 710-a and antenna panel 710-b to perform full-duplex communication. Antenna panel 710 may be configured to provide isolation between uplink and downlink operations at the base station. Full-duplex communication may include PDCCH, PUSCH, PUCCH, and PDSCH transmissions, among other examples. When antenna panel 710-a is performing downlink transmissions while antenna panel 710-b is performing uplink reception, a guard band may be configured between the downlink and uplink transmissions to provide isolation between the uplink and downlink operations at the base station.

[0133] The communication scheme 700 may enable devices (e.g., base stations, UEs, relay nodes) to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable devices to perform simultaneous transmission and reception using a particular combination of transmission modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operations, which may increase the likelihood that devices will successfully perform full-duplex LOS MIMO communications.

[0134] 8A, 8B, 8C, and 8D illustrate examples of full-duplex configuration 800, full-duplex configuration 801, full-duplex configuration 802, and full-duplex configuration 803 supporting full-duplex for LOS MIMO in accordance with aspects of the present disclosure. Full-duplex configuration 800, full-duplex configuration 801, full-duplex configuration 802, and full-duplex configuration 803 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, antenna array structure 300, wireless communication system 400, wireless communication system 401, transmission mode correlation 500, transmission mode correlation 501, resource diagram 600, resource diagram 601, resource diagram 602, or communication scheme 700. For example, full-duplex configuration 800, full-duplex configuration 801, full-duplex configuration 802, and full-duplex configuration 803 may implement or be implemented by a base station or a UE, which may be examples of the corresponding devices described with reference to FIGS. 1-7. Full-duplex configuration 800, full-duplex configuration 801, full-duplex configuration 802, and full-duplex configuration 803 may illustrate different examples of self-interference caused by full-duplex operation.

[0135] Figures 8A, 8B, 8C, and 8D may illustrate scenarios for implementing full duplex using LOS MIMO. IBFD for LOS MIMO may be implemented in different ways, such as using a subset of the antenna array for transmit and a subset for receive at the base station, relay, UE, or any combination thereof. In other examples, IBFD for LOS MIMO may be implemented using multiple antennas at the base station, relay, UE, or any combination thereof. Additionally or alternatively, IBFD for LOS MIMO may be implemented using multiple TRPs or distributed antennas at the base station. A similar example may involve simultaneous operation of MT and distributed unit (DU) functions at an IAB node. With respect to IBFD, linear interference may be a primary concern (as opposed to, for example, the impact of nonlinear interference on ACLR for SBFD).

[0136] FIG. 8A illustrates an example of a device 805 that uses a subset of a transmit antenna array and a subset of a receive antenna array to perform full-duplex communication. For example, the device 805 may include a receive antenna 810 and a transmit antenna 815, which may be different subsets of the same antenna array. In some examples, the transmit antenna 815 may cause self-interference at the receive antenna 810. FIG. 8B illustrates an example of a device that uses a receive panel 820 and a transmit panel 825 to perform full-duplex communication. Unlike the device 805 illustrated with reference to FIG. 8A, the transmit panel 825 and the receive panel 820 may be separate components. In some examples, the transmit panel 825 may cause self-interference at the receive panel 820. FIG. 8C illustrates an example of a base station 105-d that uses a receive TRP 830 and a transmit TRP 835 to perform full-duplex communication. In some examples, the transmit TRP 835 may cause self-interference at the receive TRP 830. FIG. 8D illustrates an example of an IAB node 840 that includes an MT function 845 and a DU function 850. The MT function 845 and the DU function 850 may enable the IAB node 840 to perform full-duplex communication. In some examples, the DU function 850 may cause self-interference in the MT function 845.

[0137] Full-duplex configuration 800, full-duplex configuration 801, full-duplex configuration 802, and full-duplex configuration 803 may enable devices (e.g., base stations, UEs, IAB nodes) to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable devices to perform simultaneous transmission and reception using a particular combination of transmission modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operations, which may increase the likelihood that devices will successfully perform full-duplex LOS MIMO communications.

[0138] 9 illustrates an example of a wireless communication system 900 supporting full-duplex for LOS MIMO in accordance with an aspect of the present disclosure. The wireless communication system 900 may implement or be implemented by aspects of the wireless communication system 100, the wireless communication system 200, the antenna array structure 300, the wireless communication system 400, the wireless communication system 401, the transmission mode correlation 500, the transmission mode correlation 501, the resource diagram 600, the resource diagram 601, the resource diagram 602, the communication scheme 700, the full-duplex configuration 800, the full-duplex configuration 801, the full-duplex configuration 802, or the full-duplex configuration 803. For example, the wireless communication system 900 may include a transmitter 905, a receiver 910, and a jammer 915, which may be examples of the base station or UE described with reference to FIGS. 1-8. In the wireless communication system 900, transmissions from the jammer 915 may interfere with communication between the transmitter 905 and the receiver 910.

[0139] In the example of FIG. 9, receiver 910 may experience interference while using a LOS MIMO communication scheme. Jammer 915 may transmit a signal that forms a particular radiation pattern. The radiation pattern may include lobe 925-a (e.g., a first side lobe), lobe 925-b (e.g., a second side lobe), and lobe 925-c (e.g., a main lobe). Lobe 925-c may be generated by jammer 915 using a DFT and a LOS MIMO precoder. Leakage from lobe 925-a may interfere with receiver 910 (e.g., a receiving node). In some examples, jammer 915 may be an example of a DU panel in an IAB node, and receiver 910 may be an example of a MT panel in the IAB node. In the example of FIG. 9, the transmitter 905 and receiver 910 may be separated by a distance 920-a (e.g., 200 lambda), while the jammer 915 and receiver 910 may be separated by a distance 920-b (e.g., 50 lambda in the x-axis and 20 lambda in the z-axis).

[0140] To model the directivity of the antenna array of the jammer 915, it may be assumed that DFT beamsteering is used in the jammer 915 (e.g., in addition to a LOS MIMO precoder) when the interference is caused by lobe 925-a (e.g., the first sidelobe). This may be applicable when the transmitter 905, receiver 910, jammer 915, or a combination thereof, utilizes 1D ULA, Kronecker product of 1D precoder, URA, or UPA. The combined channel (e.g., H) between the transmitter 905, receiver 910, and jammer 915 may be calculated according to Equation 10. The equivalent channel may be determined using Equation 9, where

[0141]

number

[0142]

number

[0143]

number

[0144] To analyze the equivalent channel (e.g., interference channel) of the receiver 910 when the jammer 915 is a transmitting node, it may be assumed that a LOS MIMO precoder (e.g., a Legendre-based precoder or a Slepian-based precoder) is used in the transmit array of the jammer 915. This analysis may be based on the LOS MIMO channel between the jammer 915 and the receiver 910 and may assume either an omnidirectional transmit or receiver array or a directional transmit array (e.g., when a DFT precoder is used in addition to the LOS MIMO precoder). This analysis may reflect the effects of mismatch. In some examples, only a specific LOS MIMO communication mode (e.g., mode 0) may be detectable.

[0145] The example of FIG. 9 may show the effect of self-interference on the combined channel of the receiver 910. In some examples, the transmitter 905, receiver 910, jammer 915, or a combination thereof may use a 1D ULA (e.g., a 1×8 ULA). In these cases, the difference in achievable SINR and interference may not affect the correlation between transmission modes (e.g., between mode x and mode x+1, where x is greater than 1). In some examples, interference may be caused primarily by a first unique mode (e.g., mode 0). Self-interference may be reduced or minimized at the receiver 910 (e.g., a full-duplex node) by using a first unique mode for reception and a different unique mode for transmission. This may also be applicable in the absence of a DFT and a directional shift (e.g., in the x-axis) of 20 or 50 lambda. Equation 10 may be used to determine the equivalent channel at the receiver 910, where H is the combined channel matrix and H Tx_Rx is the first equivalent channel matrix between the transmitting device and the receiving device, and H Jam_Rx is the second equivalent channel matrix between the jamming device and the receiving device,

[0146]

number

[0147]

number

[0148] The wireless communication system 900 may enable devices (e.g., base stations, UEs, relay nodes) to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable devices to perform simultaneous transmission and reception using a particular combination of transmission modes (e.g., OAM mode, singular mode) that results in lower interference and higher reliability. Specifically, the combination of transmission modes may result in greater separation between uplink and downlink operations, which may increase the likelihood that devices will successfully perform full-duplex LOS MIMO communications.

[0149] 10 illustrates an example process flow 1000 supporting full duplex for LOS MIMO in accordance with aspects of the present disclosure. Process flow 1000 may implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, antenna array structure 300, wireless communication system 400, wireless communication system 401, transmission mode correlation 500, transmission mode correlation 501, resource diagram 600, resource diagram 601, resource diagram 602, communication scheme 700, full duplex configuration 800, full duplex configuration 801, full duplex configuration 802, full duplex configuration 803, or wireless communication system 900. For example, process flow 1000 may include UE 115-e and base station 105-e, which may be examples of corresponding devices described with reference to FIGS. 1-9. In the following description of process flow 1000, operations between UE 115-e and base station 105-e may be performed in a different order or at different times than shown. Additionally or alternatively, some operations may also be omitted from process flow 1000 and other operations may be added to process flow 1000.

[0150] At 1005, the UE 115-e (e.g., a first wireless device) may send a message to the base station 105-e (e.g., a second wireless device). The message may indicate the UE 115-e's capability to support full-duplex LOS MIMO communication. At 1010, the base station 105-e may send control signaling to the UE 115-e in response to (e.g., subsequent to, based on) the message. That is, the base station 105-e may send the control signaling to the UE 115-e after receiving the message from the UE 115-e. The control signaling may include an RRC message or an instance of DCI, among other examples. The control signaling may indicate uplink channel resources allocated for one or more uplink communications, downlink channel resources allocated for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, or a combination thereof. The base station 105-e may indicate uplink LOS transmission modes and downlink LOS transmission modes that support LOS full-duplex MIMO communications, and the selected mode combination can manage (e.g., reduce, minimize) interference between the uplink and downlink full-duplex communications. The uplink channel resources may overlap (e.g., partially or fully) with the downlink channel resources in time, frequency, or both.

[0151] The first set of LOS MIMO transmission modes may correspond to a transmission priority of one or more uplink communications, a QoS threshold associated with one or more uplink communications, a precoding scheme to be used for one or more uplink communications, or a combination thereof. Similarly, the second set of one or more LOS MIMO transmission modes may correspond to a transmission priority of one or more downlink communications, a QoS threshold associated with one or more downlink communications, a precoding scheme to be used for one or more downlink communications, or a combination thereof. In some examples, the control signaling may indicate a pattern of LOS MIMO transmission modes to be used for one or more uplink communications and one or more downlink communications. Additionally or alternatively, the control signaling may indicate a number of uplink repetitions for one or more uplink communications or a number of downlink repetitions for one or more downlink communications.

[0152] In some examples, the control signaling may indicate a mapping between LOS MIMO transmission modes and channel resource pairings. Each channel resource pairing (also referred to as a channel resource pair) may include a respective uplink channel resource and a respective downlink channel resource. In such examples, the base station 105-e may transmit another control message indicating a first channel resource pairing including an uplink channel resource and a downlink channel resource. Additionally or alternatively, the control signaling may indicate a mapping between LOS MIMO transmission modes and TCI states, which may be applied on either the transmitter side or the receiver side. In such examples, the base station 105-e may transmit another control message indicating a first TCI state to be used for one or more uplink communications (e.g., by one or both of the base station 105-e or the UE 115-e), a second TCI state to be used for one or more downlink communications (e.g., by one or both of the base station 105-e or the UE 115-e), or both.

[0153] In another example, the control signaling may indicate a mapping between LOS MIMO transmission modes and polarizations (e.g., antenna polarizations), which may be applicable at either the transmitter side or the receiver side. In such an example, the base station 105-e may transmit another control message indicating a first polarization to be used for one or more uplink communications (e.g., by one or both of the base station 105-e or the UE 115-e), a second polarization to be used for one or more downlink communications (e.g., by one or both of the base station 105-e or the UE 115-e), or both. The control signaling may also indicate a mapping between LOS MIMO transmission modes and precoding schemes, which may be applicable at either the transmitter side or the receiver side. In such an example, the base station 105-e may transmit another control message indicating a first precoding scheme to be used for one or more uplink communications (e.g., by either or both of the base station 105-e or the UE 115-e), a second precoding scheme to be used for one or more downlink communications (e.g., by either or both of the base station 105-e or the UE 115-e), or both.

[0154] In some examples, the UE 115-e may determine 1015 a rotation matrix based on matching between the antenna array of the UE 115-e and the antenna array of the base station 105-e. The UE 115-e may determine the rotation matrix in accordance with Equations 5-7, as described with reference to FIG. 3. Similarly, the base station 105-e may determine 1020 an interference estimate based on the first set of LOS MIMO transmission modes, the second set of LOS MIMO transmission modes, and Equation 4, as described with reference to FIG.

[0155] At 1025, the UE 115-e may transmit one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes. At 1030, the base station 105-e may transmit one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes. In some examples, the UE 115-e may apply a precoder according to the first set of one or more LOS MIMO transmission modes to generate one or more uplink communications, and the UE 115-e may monitor and receive one or more downlink communications that are precoded by the base station 105-e according to the second set of one or more LOS MIMO transmission modes. In some examples, the UE 115-e may select a receive beam from a set of one or more available receive beams, the selected receive beam corresponding to the second set of one or more LOS MIMO transmission modes for receiving the one or more downlink communications.

[0156] In some examples, one or both of the UE 115-e or the base station 105-e may utilize a ULA structure, a URA structure, a uniform circular array (UCA) structure, or a uniform planar array (UPA) structure to communicate one or more uplink communications and one or more downlink communications. Additionally or alternatively, one or both of the UE 115-e or the base station 105-e may utilize a Slepian-based precoding scheme or a Legendre-based precoding scheme to communicate one or more uplink communications and one or more downlink communications. Thus, full-duplex communication of one or more uplink communications and one or more downlink communications between the UE 115-e and the base station 105-e may follow first and second sets of one or more LOS MIMO transmission modes to manage interference.

[0157] At 1035, the UE 115-e may compensate one or more downlink communications, one or more uplink communications, or both based on the rotation matrix determined at 1015. At 1040, the base station 105-e may compensate one or more downlink communications, one or more uplink communications, or both based on the interference estimate. Compensating one or more downlink communications and one or more uplink communications may improve the likelihood of successful communication between the UE 115-e and the base station 105-e.

[0158] The techniques and operations described in process flow 1000 may enable UE 115-e and base station 105-e to perform full-duplex LOS MIMO communications with improved communication reliability, reduced interference, and greater multiplexing gain, among other benefits. For example, the techniques and operations described in process flow 1000 may enable UE 115-e and base station 105-e to perform full-duplex communications with reduced interference based on using a particular combination of LOS MIMO transmission modes (e.g., SVD precoding schemes), which may increase the likelihood of successful communications between base station 105-e and UE 115-e.

[0159] 11 shows a block diagram 1100 of a device 1105 supporting full-duplex for LOS MIMO in accordance with an aspect of the present disclosure. The device 1105 may be an example of an aspect of a UE 115 as described with reference to FIG. 1. For example, the device 1105 may be an example of an aspect of a relay device, a wireless device, a handheld device, or a subscriber device, among other examples. The device 1105 may include a receiver 1110, a transmitter 1115, and a communications manager 1120. The device 1105 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0160] The receiver 1110 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). The information may be passed to other components of the device 1105. The receiver 1110 may utilize a single antenna or multiple antennas.

[0161] The transmitter 1115 may provide a means for transmitting signals generated by other components of the device 1105. For example, the transmitter 1115 may transmit information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). In some examples, the transmitter 1115 may be co-located with the receiver 1110 within a transceiver module. The transmitter 1115 may utilize a single antenna or multiple antennas.

[0162] The communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be examples of means for performing various aspects of full duplex for LOS MIMO as described herein. For example, the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

[0163] In some examples, the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting means for performing the functions described in this disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0164] Additionally or alternatively, in some examples, the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be implemented in code executed by a processor. When implemented in code executed by a processor, the functionality of the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be performed by a general-purpose processor (e.g., configured as or otherwise supporting a means for performing the functions described in this disclosure), a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices.

[0165] In some examples, the communications manager 1120 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the receiver 1110, the transmitter 1115, or both. For example, the communications manager 1120 may receive information from the receiver 1110 and transmit information to the transmitter 1115, or may be integrated in combination with the receiver 1110, the transmitter 1115, or both to receive information, transmit information, or perform various other operations as described herein.

[0166] The communications manager 1120 can support wireless communications in the device 1105 (e.g., the UE 115) according to examples disclosed herein. For example, the communications manager 1120 may be configured with or otherwise support a means for transmitting a message to a second wireless device indicating an ability of the device 1105 to support full-duplex LOS MIMO communications. The communications manager 1120 may be configured with or otherwise support a means for receiving control signaling from the second wireless device in response to the message, the control signaling indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications manager 1120 may be configured as or otherwise support a means for communicating (e.g., transmitting) one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and communicating (e.g., receiving) one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on control signaling.

[0167] Additionally or alternatively, the communications manager 1120 can support wireless communications in the device 1105 (e.g., the UE 115) according to examples disclosed herein. For example, the communications manager 1120 may be configured with or otherwise support a means for transmitting a message to a second wireless device indicating an ability of the device 1105 to support full-duplex LOS MIMO communications. The communications manager 1120 may be configured with or otherwise support a means for receiving control signaling from the second wireless device in response to the message, the control signaling indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications manager 1120 may be configured as or otherwise support a means for either transmitting one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and receiving one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on control signaling, or receiving one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and transmitting one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on control signaling.

[0168] By including or configuring the communications manager 1120 according to examples as described herein, the device 1105 (e.g., a processor controlling or otherwise coupled to the receiver 1110, the transmitter 1115, the communications manager 1120, or a combination thereof) may support techniques for reduced power consumption based on reducing the number of retransmissions performed by the device 1105. For example, the described techniques may enable the device 1105 to perform full-duplex communications with reduced interference based on using a particular combination of LOS MIMO transmission modes. Performing full-duplex communications with reduced interference may reduce the number of retransmissions performed by the device 1105, which may allow the device 1105 to remain in sleep mode for a longer duration. As a result, the device 1105 may experience greater power savings, among other benefits.

[0169] 12 shows a block diagram 1200 of a device 1205 supporting full-duplex for LOS MIMO in accordance with an aspect of the disclosure. The device 1205 may be an example of an aspect of the device 1105 or the UE 115 as described herein. The device 1205 may include a receiver 1210, a transmitter 1215, and a communications manager 1220. The device 1205 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0170] The receiver 1210 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). The information may be passed to other components of the device 1205. The receiver 1210 may utilize a single antenna or multiple antennas.

[0171] The transmitter 1215 may provide a means for transmitting signals generated by other components of the device 1205. For example, the transmitter 1215 may transmit information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). In some examples, the transmitter 1215 may be co-located with the receiver 1210 within a transceiver module. The transmitter 1215 may utilize a single antenna or multiple antennas.

[0172] Device 1205, or various components thereof, may be an example of a means for performing various aspects of full-duplex for LOS MIMO as described herein. For example, communications manager 1220 may include a capability message transmitter 1225, a control signaling receiver 1230, a communications component 1235, or any combination thereof. Communications manager 1220 may be an example of aspects of communications manager 1120 as described herein. In some examples, communications manager 1220 or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with receiver 1210, transmitter 1215, or both. For example, communications manager 1220 may receive information from receiver 1210 and transmit information to transmitter 1215, or may be integrated in combination with receiver 1210, transmitter 1215, or both to receive information, transmit information, or perform various other operations as described herein.

[0173] The communications manager 1220 can support wireless communications in the device 1205 (e.g., the UE 115) according to examples disclosed herein. The capabilities message transmitter 1225 may be configured with or otherwise support a means for transmitting a message to a second wireless device indicating the device's 1205's capability to support full-duplex LOS MIMO communications. The control signaling receiver 1230 may be configured with or otherwise support a means for receiving control signaling from the second wireless device in response to a message, the control signaling indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications component 1235 may be configured with or otherwise support a means for communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on the control signaling.

[0174] FIG. 13 shows a block diagram 1300 of a communications manager 1320 supporting full-duplex for LOS MIMO according to aspects of the present disclosure. Communications manager 1320 may be an example of aspects of communications manager 1120, communications manager 1220, or both, as described herein. Communications manager 1320, or various components thereof, may be an example of a means for implementing various aspects of full-duplex for LOS MIMO as described herein. For example, communications manager 1320 may include a capability message transmitter 1325, a control signaling receiver 1330, a communications component 1335, a matrix determination component 1340, a compensation component 1345, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0175] The communications manager 1320 may support wireless communications at a first wireless device (e.g., UE 115) according to examples disclosed herein. The capabilities message transmitter 1325 may be configured with or otherwise support a means for transmitting a message to a second wireless device indicating the first wireless device's capability to support full-duplex LOS MIMO communications. The control signaling receiver 1330 may be configured with or otherwise support a means for receiving control signaling from the second wireless device in response to a message, the control signaling indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications component 1335 may be configured with or otherwise support a means for communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on the control signaling.

[0176] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving from the second wireless device a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources. In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving from the second wireless device a second control message indicating a first channel resource pairing of a plurality of channel resource pairings including an uplink channel resource and a downlink channel resource.

[0177] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of TCI states. In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving a second control message from the second wireless device indicating one or both of a first TCI state of a plurality of TCI states to be used for one or more uplink communications or a second TCI state of a plurality of TCI states to be used for one or more downlink communications.

[0178] In some examples, to support receiving the control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations. In some examples, to support receiving the control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving a second control message from the second wireless device indicating one or both of a first polarization of a plurality of polarizations to be used for transmitting one or more uplink communications or a second polarization of a plurality of polarizations to be used for transmitting one or more downlink communications.

[0179] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes. In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured or otherwise support a means for receiving a second control message from the second wireless device indicating one or both of a first precoding scheme of a plurality of precoding schemes to be used for transmitting one or more uplink communications or a second precoding scheme of a plurality of precoding schemes to be used for transmitting one or more downlink communications.

[0180] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured with or otherwise support a means for receiving control signaling indicating a first set of one or more LOS MIMO transmission modes to be used for one or more uplink communications, the first set of one or more LOS MIMO transmission modes corresponding to uplink channel resources to be used for transmission of the one or more uplink communications, transmission priorities of the one or more uplink communications, QoS thresholds associated with the one or more uplink communications, precoding schemes to be used for transmission of the one or more uplink communications, or a combination thereof. For example, the first set of one or more LOS MIMO transmission modes may be determined based on the transmission priorities of the one or more uplink communications, the QoS thresholds associated with the one or more uplink communications, precoding schemes to be used for transmission of the one or more uplink communications, or a combination thereof.

[0181] In some examples, to support receiving the control signaling, the control signaling receiver 1330 may be configured with or otherwise support a means for receiving control signaling indicating a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the second set of one or more LOS MIMO transmission modes corresponding to downlink channel resources to be used for transmission of the one or more downlink communications, transmission priorities of the one or more downlink communications, QoS thresholds associated with the one or more downlink communications, a precoding scheme to be used for transmission of the one or more downlink communications, or a combination thereof.

[0182] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured with or otherwise support a means for receiving control signaling indicating a first set of one or more polarizations to be used for transmitting one or more uplink communications, a second set of one or more polarizations to be used for transmitting one or more downlink communications, or both.

[0183] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured with or otherwise support a means for receiving control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used for one or more uplink communications, the pattern corresponding to a TBS of the one or more uplink communications, a QoS threshold associated with the one or more uplink communications, a priority level (equivalently referred to herein as a transmission priority) of the one or more uplink communications, a TCI state to be used for the one or more uplink communications, or a combination thereof.

[0184] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured with or otherwise support a means for receiving control signaling indicating a pattern of LOS MIMO transmission modes to be used for one or more downlink communications, the pattern corresponding to a TBS of the one or more downlink communications, a QoS threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a TCI state to be used for the one or more downlink communications, or a combination thereof.

[0185] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured as or otherwise support a means for receiving control signaling indicating an uplink repetition number for one or more uplink communications, a downlink repetition number for one or more downlink communications, a mapping between a first set of one or more LOS MIMO transmission modes and the uplink repetition number, a mapping between a second set of one or more LOS MIMO transmission modes and the downlink repetition number, or a combination thereof.

[0186] In some examples, to support receiving control signaling, the control signaling receiver 1330 may be configured with or otherwise support a means for receiving one or more of an RRC message or an instance of DCI indicating uplink channel resources, downlink channel resources, a first set of one or more LOS MIMO transmission modes, a second set of one or more LOS MIMO transmission modes, or a combination thereof.

[0187] In some examples, matrix determination component 1340 may be configured or otherwise support a means for determining a rotation matrix based on a matching between a first antenna array of a first wireless device and a second antenna array of a second wireless device. In some examples, compensation component 1345 may be configured or otherwise support a means for compensating one or more downlink communications, one or more uplink communications, or both based on the rotation matrix.

[0188] In some examples, to support communicating one or more uplink communications and one or more downlink communications, communications component 1335 may be configured as or otherwise support a means for communicating one or more uplink communications and one or more downlink communications in accordance with a Slepian-based precoding scheme or a Legendre-based precoding scheme.

[0189] In some examples, to support communicating one or more uplink communications and one or more downlink communications, the communications component 1335 may be configured as or otherwise support a means for communicating one or more uplink communications and one or more downlink communications using a ULA structure, a URA structure, a UCA structure, or a UPA structure.

[0190] 14 shows a diagram of a system 1400 including a device 1405 supporting full-duplex for LOS MIMO according to aspects of the disclosure. The device 1405 may be or include an example of a component of a device 1105, a device 1205, or a UE 115 as described herein. The device 1405 may communicate wirelessly with one or more base stations 105, UEs 115, or any combination thereof. The device 1405 may include components for two-way voice and data communication, including components for transmitting and receiving communications, such as a communications manager 1420, an input / output (I / O) controller 1410, a transceiver 1415, an antenna 1425, a memory 1430, code 1435, and a processor 1440. These components may be in electronic communication via one or more buses (e.g., bus 1445) or may be otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically).

[0191] The I / O controller 1410 may manage input and output signals for the device 1405. The I / O controller 1410 may also manage peripheral devices not integrated with the device 1405. In some cases, the I / O controller 1410 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1410 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX®, or another known operating system. Additionally or alternatively, the I / O controller 1410 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 1410 may be implemented as part of a processor, such as the processor 1440. In some cases, a user may interact with the device 1405 through the I / O controller 1410 or through hardware components controlled by the I / O controller 1410 .

[0192] In some cases, the device 1405 may include a single antenna 1425. However, in some other cases, the device 1405 may have two or more antennas 1425, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions. The transceiver 1415 may communicate bidirectionally via one or more antennas 1425, a wired link, or a wireless link, as described herein. For example, the transceiver 1415 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1415 may also include a modem for modulating packets and providing the modulated packets to one or more antennas 1425 for transmission, and for demodulating packets received from the one or more antennas 1425. The transceiver 1415, or the transceiver 1415 and one or more antennas 1425, may be an example of the transmitter 1115, transmitter 1215, receiver 1110, receiver 1210, or any combination or component thereof described herein.

[0193] Memory 1430 may include random access memory (RAM) and read-only memory (ROM). Memory 1430 may store computer-readable computer-executable code 1435 including instructions that, when executed by processor 1440, cause device 1405 to perform various functions described herein. Code 1435 may be stored on a non-transitory computer-readable medium, such as system memory or another type of memory. In some cases, code 1435 may not be directly executable by processor 1440, but may (e.g., when compiled and executed) cause a computer to perform functions described herein. In some cases, memory 1430 may include a basic I / O system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices, among other things.

[0194] The processor 1440 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, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1440 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated with the processor 1440. The processor 1440 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1430) to cause the device 1405 to perform various functions (e.g., functions or tasks supporting full duplex for LOS MIMO). For example, the device 1405 or a component of the device 1405 may include the processor 1440 and the memory 1430 coupled to the processor 1440, where the processor 1440 and the memory 1430 are configured to perform various functions described herein.

[0195] The communications manager 1420 can support wireless communications in the device 1405 (e.g., the UE 115) according to examples disclosed herein. For example, the communications manager 1420 may be configured with or otherwise support a means for transmitting a message to a second wireless device indicating an ability of the device 1405 to support full-duplex LOS MIMO communications. The communications manager 1420 may be configured with or otherwise support a means for receiving control signaling from the second wireless device in response to the message, the control signaling indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications manager 1420 may be configured as or otherwise support a means for communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on control signaling.

[0196] By including or configuring a communications manager 1420 according to examples described herein, the device 1405 may support techniques for improved communication reliability and reduced interference. For example, the described techniques may enable the device 1405 to perform full-duplex communications with reduced interference by using a particular combination of LOS MIMO transmission modes (e.g., SVD precoding schemes). In addition, the described techniques may enable the device 1405 to experience higher multiplexing gain by using a full-duplex LOS MIMO communication scheme.

[0197] In some examples, communications manager 1420 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with transceiver 1415, one or more antennas 1425, or any combination thereof. Although communications manager 1420 is shown as a separate component, in some examples, one or more functions described with respect to communications manager 1420 may be supported or performed by processor 1440, memory 1430, code 1435, or any combination thereof. For example, code 1435 may include instructions executable by processor 1440 to cause device 1405 to perform various aspects of full duplex for LOS MIMO described herein, or processor 1440 and memory 1430 may be otherwise configured to perform or support such operations.

[0198] FIG. 15 shows a block diagram 1500 of a device 1505 supporting full-duplex for LOS MIMO according to an aspect of the present disclosure. The device 1505 may be an example of an aspect of a base station 105 as described with reference to FIG. 1. For example, the device 1505 may be an example of an aspect of an access point, a radio transceiver, a TRP, an eNB, or a gNB, among other examples. The device 1505 may include a receiver 1510, a transmitter 1515, and a communications manager 1520. The device 1505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0199] The receiver 1510 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). The information may be passed to other components of the device 1505. The receiver 1510 may utilize a single antenna or multiple antennas.

[0200] The transmitter 1515 may provide a means for transmitting signals generated by other components of the device 1505. For example, the transmitter 1515 may transmit information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). In some examples, the transmitter 1515 may be co-located with the receiver 1510 within a transceiver module. The transmitter 1515 may utilize a single antenna or multiple antennas.

[0201] The communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be examples of means for performing various aspects of full duplex for LOS MIMO as described herein. For example, the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

[0202] In some examples, the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in this disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0203] Additionally or alternatively, in some examples, the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be implemented in code executed by a processor. When implemented in code executed by a processor, the functionality of the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be performed by a general-purpose processor (e.g., configured as or otherwise supporting a means for performing the functions described in this disclosure), a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices.

[0204] In some examples, the communications manager 1520 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the receiver 1510, the transmitter 1515, or both. For example, the communications manager 1520 may receive information from the receiver 1510 and transmit information to the transmitter 1515, or may be integrated in combination with the receiver 1510, the transmitter 1515, or both to receive information, transmit information, or perform various other operations described herein.

[0205] The communications manager 1520 can support wireless communications in the device 1505 (e.g., a base station 105) according to examples disclosed herein. For example, the communications manager 1520 may be configured with or otherwise support a means for receiving a message from a second wireless device indicating an ability of the second wireless device to support full-duplex LOS MIMO communications. The communications manager 1520 may be configured with or otherwise support a means for transmitting control signaling based on receiving a message from the second wireless device indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications manager 1520 may be configured as or otherwise support a means for communicating (e.g., receiving) one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and communicating (e.g., transmitting) one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on control signaling.

[0206] Additionally or alternatively, the communications manager 1520 can support wireless communications in the device 1505 (e.g., base station 105, control node, TRP) according to examples disclosed herein. For example, the communications manager 1520 may be configured with or otherwise support a means for receiving a message from the second wireless device indicating an ability of the second wireless device to support full-duplex LOS MIMO communications. The communications manager 1520 may be configured with or otherwise support a means for transmitting control signaling based on receiving a message from the second wireless device indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications manager 1520 may be configured as or otherwise support a means for either receiving one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and transmitting one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on control signaling, or transmitting one or more uplink communications over uplink channel resources according to the first set of one or more LOS MIMO transmission modes and receiving one or more downlink communications over downlink channel resources according to the second set of one or more LOS MIMO transmission modes based on control signaling.

[0207] By including or configuring the communications manager 1520 according to examples as described herein, the device 1505 (e.g., a processor controlling or otherwise coupled to the receiver 1510, the transmitter 1515, the communications manager 1520, or a combination thereof) may support techniques for reduced power consumption based on reducing the number of retransmissions performed by the device 1505. For example, the described techniques may enable the device 1505 to perform full-duplex communications with greater reliability and reduced interference, which may reduce the number of retransmissions performed by the device 1505. As a result, the device 1505 can stay in sleep mode for longer durations, which may lower power consumption in the device 1505, among other benefits.

[0208] 16 shows a block diagram 1600 of a device 1605 supporting full-duplex for LOS MIMO in accordance with an aspect of the disclosure. The device 1605 may be an example of an aspect of the device 1505 or base station 105 as described herein. The device 1605 may include a receiver 1610, a transmitter 1615, and a communications manager 1620. The device 1605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0209] The receiver 1610 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). The information may be passed to other components of the device 1605. The receiver 1610 may utilize a single antenna or multiple antennas.

[0210] The transmitter 1615 may provide a means for transmitting signals generated by other components of the device 1605. For example, the transmitter 1615 may transmit information such as packets, user data, control information, or any combination thereof associated with various traffic channels (e.g., control channels, data channels, traffic channels related to full duplex for LOS MIMO). In some examples, the transmitter 1615 may be co-located with the receiver 1610 within a transceiver module. The transmitter 1615 may utilize a single antenna or multiple antennas.

[0211] The device 1605, or various components thereof, may be an example of a means for performing various aspects of full-duplex for LOS MIMO as described herein. For example, the communications manager 1620 may include a capability message receiver 1625, a control signaling transmitter 1630, a communications component 1635, or any combination thereof. The communications manager 1620 may be an example of aspects of the communications manager 1520 described herein. In some examples, the communications manager 1620 or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the receiver 1610, the transmitter 1615, or both. For example, the communications manager 1620 may receive information from the receiver 1610 and transmit information to the transmitter 1615, or may be integrated in combination with the receiver 1610, the transmitter 1615, or both to receive information, transmit information, or perform various other operations described herein.

[0212] The communications manager 1620 can support wireless communications in the device 1605 (e.g., a base station 105) according to examples disclosed herein. The capabilities message receiver 1625 may be configured as or otherwise support a means for receiving a message from the second wireless device indicating the second wireless device's capability to support full-duplex LOS MIMO communications. The control signaling transmitter 1630 may be configured as or otherwise support a means for transmitting control signaling based on receiving a message from the second wireless device indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications component 1635 may be configured with or otherwise support a means for communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on the control signaling.

[0213] FIG. 17 shows a block diagram 1700 of a communications manager 1720 supporting full-duplex for LOS MIMO according to aspects of the disclosure. Communications manager 1720 may be an example of aspects of communications manager 1520, communications manager 1620, or both, as described herein. Communications manager 1720, or various components thereof, may be an example of a means for implementing various aspects of full-duplex for LOS MIMO as described herein. For example, communications manager 1720 may include a capabilities message receiver 1725, a control signaling transmitter 1730, a communications component 1735, an interference estimation component 1740, a compensation component 1745, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0214] The communications manager 1720 may support wireless communications at a first wireless device (e.g., a base station 105) according to examples disclosed herein. The capabilities message receiver 1725 may be configured as or otherwise support a means for receiving a message from the second wireless device indicating the second wireless device's capability to support full-duplex LOS MIMO communications. The control signaling transmitter 1730 may be configured as or otherwise support a means for transmitting control signaling based on receiving a message from the second wireless device indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications component 1735 may be configured with or otherwise support a means for communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and communicating one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on the control signaling.

[0215] In some examples, to support receiving control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources. In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a second control message indicating a first channel resource pairing of a plurality of channel resource pairings including an uplink channel resource and a downlink channel resource.

[0216] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of TCI states. In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a second control message indicating one or both of a first TCI state to be used for one or more uplink communications or a second TCI state to be used for one or more downlink communications.

[0217] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations. In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a second control message indicating one or both of a first polarization of a plurality of polarizations to be used for transmitting one or more uplink communications or a second polarization of a plurality of polarizations to be used for transmitting one or more downlink communications.

[0218] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes. In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured or otherwise support a means for transmitting a second control message indicating one or both of a first precoding scheme of a plurality of precoding schemes to be used for transmitting one or more uplink communications or a second precoding scheme of a plurality of precoding schemes to be used for transmitting one or more downlink communications.

[0219] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured as or otherwise support a means for transmitting control signaling indicating a first set of one or more LOS MIMO transmission modes to be used for one or more uplink communications, the first set of one or more LOS MIMO transmission modes corresponding to uplink channel resources to be used for transmission of the one or more uplink communications, transmission priorities of the one or more uplink communications, QoS thresholds associated with the one or more uplink communications, a precoding scheme to be used for transmission of the one or more uplink communications, or a combination thereof.

[0220] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured with or otherwise support a means for transmitting control signaling indicating a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the second set of one or more LOS MIMO transmission modes corresponding to downlink channel resources to be used for transmission of the one or more downlink communications, transmission priorities of the one or more downlink communications, QoS thresholds associated with the one or more downlink communications, precoding schemes to be used for the one or more downlink communications, or a combination thereof.

[0221] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured with or otherwise support a means for transmitting control signaling indicating a first set of one or more polarizations to be used for transmitting one or more uplink communications, a second set of one or more polarizations to be used for transmitting one or more downlink communications, or both.

[0222] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured with or otherwise support a means for transmitting control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used for one or more uplink communications, the pattern corresponding to a TBS of the one or more uplink communications, a QoS threshold associated with the one or more uplink communications, a priority level of the one or more uplink communications, a TCI state to be used for the one or more uplink communications, or a combination thereof.

[0223] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured with or otherwise support a means for transmitting control signaling indicating a pattern of LOS MIMO transmission modes to be used for one or more downlink communications, the pattern corresponding to a TBS of the one or more downlink communications, a QoS threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a TCI state to be used for the one or more downlink communications, or a combination thereof.

[0224] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured as or otherwise support a means for transmitting control signaling indicating an uplink repetition number for one or more uplink communications, a downlink repetition number for one or more downlink communications, a mapping between a first set of one or more LOS MIMO transmission modes and the uplink repetition number, a mapping between a second set of one or more LOS MIMO transmission modes and the downlink repetition number, or a combination thereof.

[0225] In some examples, to support transmitting control signaling, the control signaling transmitter 1730 may be configured with or otherwise support a means for transmitting one or more of an RRC message or an instance of DCI indicating uplink channel resources, downlink channel resources, a first set of one or more LOS MIMO transmission modes, a second set of one or more LOS MIMO transmission modes, or a combination thereof.

[0226] In some examples, interference estimation component 1740 may be configured or otherwise support a means for determining an interference estimate based on a first set of one or more LOS MIMO transmission modes and a second set of one or more LOS MIMO transmission modes. In some examples, compensation component 1745 may be configured or otherwise support a means for compensating one or more downlink communications, one or more uplink communications, or both based on the interference estimate.

[0227] 18 shows a diagram of a system 1800 including a device 1805 supporting full-duplex for LOS MIMO according to aspects of the disclosure. The device 1805 may be or include examples of components of a device 1505, a device 1605, or a base station 105 as described herein. The device 1805 may be in wireless communication with one or more base stations 105, UEs 115, or any combination thereof. The device 1805 may include components for two-way voice and data communication, including components for transmitting and receiving communications, such as a communications manager 1820, a network communications manager 1810, a transceiver 1815, an antenna 1825, a memory 1830, code 1835, a processor 1840, and an inter-station communications manager 1845. These components may be in electronic communication via one or more buses (e.g., a bus 1850) or may be otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically).

[0228] The network communications manager 1810 may manage communications with the core network 130 (e.g., via one or more wired backhaul links). For example, the network communications manager 1810 may manage the forwarding of data communications for client devices, such as one or more UEs 115.

[0229] In some cases, the device 1805 may include a single antenna 1825. However, in some other cases, the device 1805 may have two or more antennas 1825, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions. The transceiver 1815 may communicate bidirectionally via one or more antennas 1825, a wired link, or a wireless link, as described herein. For example, the transceiver 1815 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1815 may also include a modem for modulating packets and providing the modulated packets to one or more antennas 1825 for transmission, and for demodulating packets received from the one or more antennas 1825. The transceiver 1815, or the transceiver 1815 and one or more antennas 1825, may be an example of the transmitter 1515, the transmitter 1615, the receiver 1510, the receiver 1610, or any combination or component thereof described herein.

[0230] The memory 1830 may include RAM and ROM. The memory 1830 may store computer-readable computer-executable code 1835 including instructions that, when executed by the processor 1840, cause the device 1805 to perform various functions described herein. The code 1835 may be stored on a non-transitory computer-readable medium, such as system memory or another type of memory. In some cases, the code 1835 may not be directly executable by the processor 1840, but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, the memory 1830 may include a BIOS, which may control basic hardware or software operations, such as interaction with peripheral components or devices, among other things.

[0231] The processor 1840 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, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1840 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated with the processor 1840. The processor 1840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1830) to cause the device 1805 to perform various functions (e.g., functions or tasks supporting full duplex for LOS MIMO). For example, the device 1805 or a component of the device 1805 may include the processor 1840 and the memory 1830 coupled to the processor 1840, where the processor 1840 and the memory 1830 are configured to perform various functions described herein.

[0232] The inter-station communications manager 1845 may manage communications with other base stations 105 and may include a controller or scheduler for cooperating with the other base stations 105 to control communications with the UE 115. For example, the inter-station communications manager 1845 may coordinate scheduling for transmissions to the UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-station communications manager 1845 may provide an X2 interface within the LTE / LTE-A wireless communications network technology for communicating between the base stations 105.

[0233] The communications manager 1820 can support wireless communications in the device 1805 (e.g., a base station 105) according to examples disclosed herein. For example, the communications manager 1820 may be configured with or otherwise support a means for receiving a message from a second wireless device indicating an ability of the second wireless device to support full-duplex LOS MIMO communications. The communications manager 1820 may be configured with or otherwise support a means for transmitting control signaling based on receiving a message from the second wireless device indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The communications manager 1820 may be configured as or otherwise support a means for communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based on control signaling.

[0234] By including or configuring a communications manager 1820 according to examples described herein, the device 1805 may support techniques for improved communication reliability, reduced interference, and higher multiplexing gain, among other benefits. For example, the described techniques may enable the device 1805 to perform full-duplex communications using a combination of LOS MIMO transmission modes. The combination of LOS MIMO transmission modes used by the device 1805 may result in lower interference levels at the device 1805, which may increase the likelihood of successful communications at the device 1805.

[0235] In some examples, communications manager 1820 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with transceiver 1815, one or more antennas 1825, or any combination thereof. Although communications manager 1820 is shown as a separate component, in some examples, one or more functions described with respect to communications manager 1820 may be supported or performed by processor 1840, memory 1830, code 1835, or any combination thereof. For example, code 1835 may include instructions executable by processor 1840 to cause device 1805 to perform various aspects of full duplex for LOS MIMO described herein, or processor 1840 and memory 1830 may be otherwise configured to perform or support such operations.

[0236] FIG. 19 shows a flowchart illustrating a method 1900 for supporting full-duplex for LOS MIMO according to an aspect of the present disclosure. The operations of method 1900 may be implemented by a first wireless device (e.g., a UE) or components thereof, as described herein. For example, the operations of method 1900 may be performed by a UE 115, as described with reference to FIGS. 1-14. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using dedicated hardware.

[0237] At 1905, the method may include transmitting a message to a second wireless device indicating a capability of the first wireless device to support full-duplex LOS MIMO communication. The operations of 1905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed by a capability message transmitter 1325, as described with reference to FIG. 13.

[0238] At 1910, the method may include receiving, in response to the message, control signaling from the second wireless device indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The operations of 1910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1910 may be performed by a control signaling receiver 1330 as described with reference to FIG. 13.

[0239] At 1915, the method may include communicating, based at least in part on the control signaling, one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and communicating one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes. The operations of 1915 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1915 may be performed by communication component 1335 as described with reference to FIG. 13.

[0240] FIG. 20 shows a flowchart illustrating a method 2000 for supporting full-duplex for LOS MIMO according to an aspect of the present disclosure. The operations of method 2000 may be implemented by a first wireless device (e.g., a UE) or components thereof, as described herein. For example, the operations of method 2000 may be performed by a UE 115, as described with reference to FIGS. 1-14. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using dedicated hardware.

[0241] At 2005, the method may include transmitting a message to a second wireless device indicating a capability of the first wireless device to support full-duplex LOS MIMO communication. The operations of 2005 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2005 may be performed by a capability message transmitter 1325, as described with reference to FIG. 13 .

[0242] In 2010, the method may include receiving from a second wireless device a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources. The operations of 2010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2010 may be performed by a control signaling receiver 1330, as described with reference to FIG. 13.

[0243] In 2015, the method may include receiving a second control message from the second wireless device indicating a first channel resource pairing of a plurality of channel resource pairings including an uplink channel resource and a downlink channel resource. The operations of 2015 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2015 may be performed by a control signaling receiver 1330, as described with reference to FIG. 13.

[0244] At 2020, the method may include communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and communicating one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based at least in part on the first control message and the second control message. The operations of 2020 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2020 may be performed by a communication component 1335 as described with reference to FIG. 13.

[0245] FIG. 21 shows a flowchart illustrating a method 2100 for supporting full duplex for LOS MIMO according to an aspect of the present disclosure. The operations of method 2100 may be implemented by a base station or components thereof as described herein. For example, the operations of method 2100 may be performed by base station 105 as described with reference to FIGS. 1-10 and 15-18. In some examples, the base station may execute a set of instructions to control functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using dedicated hardware.

[0246] At 2105, the method may include receiving a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communication. The operations of 2105 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2105 may be performed by a capability message receiver 1725, as described with reference to FIG. 17.

[0247] At 2110, the method may include transmitting, based at least in part on receiving a message from the second wireless device, control signaling indicating uplink channel resources assigned for one or more uplink communications, downlink channel resources assigned for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time, frequency, or both. The operations of 2110 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2110 may be performed by a control signaling transmitter 1730, as described with reference to FIG. 17.

[0248] At 2115, the method may include communicating one or more uplink communications over uplink channel resources according to a first set of one or more LOS MIMO transmission modes and communicating one or more downlink communications over downlink channel resources according to a second set of one or more LOS MIMO transmission modes based at least in part on the control signaling. The operations of 2115 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2115 may be performed by communication component 1735, as described with reference to FIG. 17.

[0249] FIG. 22 shows a flowchart illustrating a method 2200 for supporting full duplex for LOS MIMO according to an aspect of the present disclosure. The operations of method 2200 may be implemented by a base station or components thereof as described herein. For example, the operations of method 2200 may be performed by base station 105 as described with reference to FIGS. 1-10 and 15-18. In some examples, the base station may execute a set of instructions to control functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using dedicated hardware.

[0250] At 2205, the method may include receiving a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communication. The operations of 2205 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2205 may be performed by a capability message receiver 1725, as described with reference to FIG. 17.

[0251] At 2210, the method may include transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations. The operations of 2210 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2210 may be performed by the control signaling transmitter 1730, as described with reference to FIG. 17.

[0252] At 2215, the method may include transmitting a second control message indicating one or both of a first polarization of the plurality of polarizations to be used for transmission of the one or more uplink communications or a second polarization of the plurality of polarizations to be used for transmission of the one or more downlink communications. The operations of 2215 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2215 may be performed by a control signaling transmitter 1730, as described with reference to FIG. 17.

[0253] At 2220, the method may include communicating one or more uplink communications using a first polarization and communicating one or more downlink communications using a second polarization based at least in part on the first control message and the second control message. The operations of 2220 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2220 may be performed by communication component 1735, as described with reference to FIG. 17.

[0254] The following provides a summary of aspects of the present disclosure.

[0255] Aspect 1: A method for wireless communication in a first wireless device, the method comprising: transmitting a message to a second wireless device indicating a capability of the first wireless device to support full-duplex line-of-sight (LOS) multiple-input multiple-output (MIMO) communications; receiving control signaling from the second wireless device in response to the message, the control signaling indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time, frequency, or both; and communicating the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes based at least in part on the control signaling. and communicating one or more downlink communications over downlink channel resources according to a second set of MIMO transmission modes. The method of aspect 1 may enable the first wireless device to perform one or more uplink communications and one or more downlink communications with greater communication reliability by reducing interference between the one or more uplink communications and the one or more downlink communications.

[0256] Aspect 2: A method for wireless communication in a first wireless device, the method comprising: transmitting a message to a second wireless device indicating a capability of the first wireless device to support full-duplex line-of-sight (LOS) multiple-input multiple-output (MIMO) communications; receiving control signaling from the second wireless device in response to the message, the control signaling indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time, frequency, or both; or transmitting, based at least in part on the control signaling, the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes, and transmitting the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes. and receiving, based at least in part on the control signal, one or more downlink communications via downlink channel resources according to a first set of one or more LOS MIMO transmission modes and transmitting, based at least in part on the control signal, one or more downlink communications via uplink channel resources according to a second set of one or more LOS MIMO transmission modes. The method of aspect 2 may enable the first wireless device to perform one or more uplink communications and one or more downlink communications with higher communication reliability by reducing interference between the one or more uplink communications and the one or more downlink communications.

[0257] Aspect 3: The method of Aspects 1 or 2, wherein receiving control signaling includes: receiving from the second wireless device a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources; and receiving from the second wireless device a second control message indicating a first channel resource pairing of the plurality of channel resource pairings including an uplink channel resource and a downlink channel resource. The method of Aspect 3 may enable the second wireless device to indicate the uplink channel resource and the downlink channel resource with reduced signaling overhead.

[0258] Aspect 4: The method of any of Aspects 1-3, wherein receiving control signaling includes receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of transmission configuration indication states, and receiving a second control message from the second wireless device indicating one or both of a first transmission configuration indication state of the plurality of transmission configuration indication states to be used for one or more uplink communications or a second transmission configuration indication state of the plurality of transmission configuration indication states to be used for one or more downlink communications. The method of Aspect 4 may enable the second wireless device to indicate the first transmission configuration indication state and the second transmission configuration indication state with reduced signaling overhead.

[0259] Aspect 5: The method of any of Aspects 1-4, wherein receiving the control signaling includes receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations, and receiving a second control message from the second wireless device indicating one or both of a first polarization of the plurality of polarizations to be used for transmitting one or more uplink communications or a second polarization of the plurality of polarizations to be used for transmitting one or more downlink communications. The method of Aspect 5 may enable the second wireless device to indicate the first polarization and the second polarization with reduced signaling overhead.

[0260]

[0014] Aspect 6: The method of any of aspects 1 to 5, wherein receiving control signaling includes receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes, and receiving a second control message from the second wireless device indicating one or both of a first precoding scheme of the plurality of precoding schemes to be used for transmitting one or more uplink communications or a second precoding scheme of the plurality of precoding schemes to be used for transmitting one or more downlink communications. The method of aspect 4 may enable the second wireless device to indicate the first precoding scheme and the second precoding scheme with reduced signaling overhead.

[0261] Aspect 7: The method of any of aspects 1-6, wherein receiving the control signaling includes receiving control signaling indicating a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, wherein the first set of one or more LOS MIMO transmission modes corresponds to uplink channel resources to be used for transmission of the one or more uplink communications, transmission priorities of the one or more uplink communications, quality of service thresholds associated with the one or more uplink communications, precoding schemes to be used for transmission of the one or more uplink communications, or a combination thereof.

[0262] Aspect 8: The method of any of aspects 1-7, wherein receiving the control signaling includes receiving control signaling indicating a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the second set of one or more LOS MIMO transmission modes corresponds to downlink channel resources to be used for transmission of the one or more downlink communications, transmission priorities of the one or more downlink communications, quality of service thresholds associated with the one or more downlink communications, precoding schemes to be used for transmission of the one or more downlink communications, or a combination thereof.

[0263] Aspect 9: The method of any of aspects 1-8, wherein receiving the control signaling includes receiving control signaling indicating a first set of one or more polarizations to be used for transmitting one or more uplink communications, a second set of one or more polarizations to be used for transmitting one or more downlink communications, or both.

[0264] Aspect 10: The method of any of aspects 1-9, wherein receiving the control signaling includes receiving control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used for one or more uplink communications, the pattern corresponding to a transport block size of the one or more uplink communications, a quality of service threshold associated with the one or more uplink communications, a priority level of the one or more uplink communications, a transmission configuration indication state to be used for the one or more uplink communications, or a combination thereof.

[0265] Aspect 11: The method of any of aspects 1-10, wherein receiving the control signaling includes receiving control signaling indicating a pattern of LOS MIMO transmission modes to be used for one or more downlink communications, the pattern corresponding to a transport block size of the one or more downlink communications, a quality of service threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a transmission configuration indication state to be used for the one or more downlink communications, or a combination thereof.

[0266] Aspect 12: The method of any of aspects 1-11, wherein receiving the control signaling includes receiving control signaling indicating an uplink repetition count for one or more uplink communications, a downlink repetition count for one or more downlink communications, a mapping between a first set of one or more LOS MIMO transmission modes and the uplink repetition count, a mapping between a second set of one or more LOS MIMO transmission modes and the downlink repetition count, or a combination thereof.

[0267] Aspect 13: The method of any of aspects 1-12, wherein receiving the control signaling includes receiving one or more of a radio resource control message or an instance of downlink control information indicating uplink channel resources, downlink channel resources, a first set of one or more LOS MIMO transmission modes, a second set of one or more LOS MIMO transmission modes, or a combination thereof.

[0268] Aspect 14: The method of any of Aspects 1-13, further including: determining a rotation matrix based at least in part on a matching between a first antenna array of the first wireless device and a second antenna array of the second wireless device; and compensating one or more downlink communications, one or more uplink communications, or both based at least in part on the rotation matrix.

[0269] Aspect 15: The method of any of aspects 1 to 14, wherein communicating one or more uplink communications and one or more downlink communications includes communicating the one or more uplink communications and the one or more downlink communications in accordance with a Slepian-based precoding scheme or a Legendre-based precoding scheme.

[0270] Aspect 16: The method of any of aspects 1-15, wherein communicating the one or more uplink communications and the one or more downlink communications includes communicating the one or more uplink communications and the one or more downlink communications using a uniformly spaced linear array structure, a uniformly spaced rectangular array structure, a uniformly spaced circular array structure, or a uniformly spaced planar array structure.

[0271] Aspect 17: A method for wireless communication in a first wireless device, the method comprising: receiving a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communications; transmitting control signaling based at least in part on receiving the message from the second wireless device indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time, frequency, or both; communicating the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes based at least in part on the control signaling; and communicating one or more downlink communications over downlink channel resources according to a second set of MIMO transmission modes. The method of aspect 17 can enable the first wireless device to perform one or more uplink communications and one or more downlink communications with greater communication reliability by reducing interference between the one or more uplink communications and the one or more downlink communications.

[0272] Aspect 18: A method for wireless communication in a first wireless device, the method comprising: receiving a message from the second wireless device indicating a capability of the second wireless device to support full-duplex LOS MIMO communications; transmitting control signaling based at least in part on receiving the message from the second wireless device, the control signaling indicating assigned uplink channel resources for one or more uplink communications, assigned downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time, frequency, or both; receiving the one or more uplink communications over the uplink channel resources in accordance with the first set of one or more LOS MIMO transmission modes based at least in part on the control signaling; and transmitting, based at least in part on the control signaling, one or more downlink communications over the uplink channel resources according to a first set of one or more LOS MIMO transmission modes and receiving one or more downlink communications over the downlink channel resources according to a second set of one or more LOS MIMO transmission modes. The method of aspect 18 may enable the first wireless device to perform one or more uplink communications and one or more downlink communications with higher communication reliability by reducing interference between the one or more uplink communications and the one or more downlink communications.

[0273] Aspect 19: The method of aspect 17 or 18, wherein transmitting the control signaling includes: transmitting a first control message indicating mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources; and transmitting a second control message indicating a first channel resource pairing of the plurality of channel resource pairings including an uplink channel resource and a downlink channel resource. The method of aspect 19 may enable the first wireless device to indicate the uplink channel resource and the downlink channel resource with reduced signaling overhead.

[0274] Aspect 20: The method of any of Aspects 17-19, wherein transmitting the control signaling includes transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of transmission configuration indication states, and transmitting a second control message indicating one or both of a first transmission configuration indication state to be used for one or more uplink communications or a second transmission configuration indication state to be used for one or more downlink communications. The method of Aspect 20 may enable the first wireless device to indicate the first transmission configuration indication state and the second transmission configuration indication state with reduced signaling overhead.

[0275] Aspect 21: The method of any of Aspects 17-20, wherein transmitting the control signaling includes transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations, and transmitting a second control message indicating one or both of a first polarization of the plurality of polarizations to be used for transmitting one or more uplink communications or a second polarization of the plurality of polarizations to be used for transmitting one or more downlink communications. The method of Aspect 21 may enable the first wireless device to indicate the first polarization and the second polarization with reduced signaling overhead.

[0276] Aspect 22: The method of any of Aspects 17-21, wherein transmitting the control signaling includes transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes, and transmitting a second control message indicating one or both of a first precoding scheme of the plurality of precoding schemes to be used for transmitting one or more uplink communications or a second precoding scheme of the plurality of precoding schemes to be used for transmitting one or more downlink communications. The method of Aspect 21 may enable the first wireless device to indicate the first precoding scheme and the second precoding scheme with reduced signaling overhead.

[0277] Aspect 23: The method of any of aspects 17-22, wherein transmitting the control signaling includes transmitting control signaling indicating a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, wherein the first set of one or more LOS MIMO transmission modes corresponds to uplink channel resources to be used for transmission of the one or more uplink communications, transmission priorities of the one or more uplink communications, quality of service thresholds associated with the one or more uplink communications, precoding schemes to be used for transmission of the one or more uplink communications, or a combination thereof.

[0278] Aspect 24: The method of any of aspects 17-23, wherein transmitting the control signaling includes transmitting control signaling indicating a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the second set of one or more LOS MIMO transmission modes corresponds to downlink channel resources to be used for transmission of the one or more downlink communications, transmission priorities of the one or more downlink communications, quality of service thresholds associated with the one or more downlink communications, precoding schemes to be used for the one or more downlink communications, or a combination thereof.

[0279] Aspect 25: The method of any of aspects 17 to 24, wherein transmitting the control signaling includes transmitting control signaling indicating a first set of one or more polarizations to be used for transmitting one or more uplink communications, a second set of one or more polarizations to be used for transmitting one or more downlink communications, or both.

[0280] Aspect 26: The method of any of aspects 17-25, wherein transmitting the control signaling includes transmitting control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used for one or more uplink communications, the pattern corresponding to a transport block size of the one or more uplink communications, a quality of service threshold associated with the one or more uplink communications, a priority level of the one or more uplink communications, a transmission configuration indication state to be used for the one or more uplink communications, or a combination thereof.

[0281] Aspect 27: The method of any of aspects 17-26, wherein transmitting the control signaling includes transmitting control signaling indicating a pattern of LOS MIMO transmission modes to be used for one or more downlink communications, the pattern corresponding to a transport block size of the one or more downlink communications, a quality of service threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a transmission configuration indication state to be used for the one or more downlink communications, or a combination thereof.

[0282] Example 28: The method of any of Examples 17 to 27, wherein transmitting the control signaling includes transmitting control signaling indicating an uplink repetition number for one or more uplink communications, a downlink repetition number for one or more downlink communications, a mapping between a first set of one or more LOS MIMO transmission modes and the uplink repetition number, a mapping between a second set of one or more LOS MIMO transmission modes and the downlink repetition number, or a combination thereof.

[0283] Example 29: The method of any of Examples 17 to 28, wherein transmitting the control signaling includes transmitting one or more of a radio resource control message or an instance of downlink control information indicating uplink channel resources, downlink channel resources, a first set of one or more LOS MIMO transmission modes, a second set of one or more LOS MIMO transmission modes, or a combination thereof.

[0284] Aspect 30: The method of any of aspects 17-29, further including: determining an interference estimate based at least in part on the first set of one or more LOS MIMO transmission modes and the second set of one or more LOS MIMO transmission modes; and compensating one or more downlink communications, one or more uplink communications, or both based at least in part on the interference estimate.

[0285] Aspect 31: An apparatus for wireless communication in a first wireless device, comprising: a processor; a memory coupled to the processor; and one or more instructions stored in the memory, the one or more instructions executable by the processor to cause the apparatus to perform any of the methods of aspects 1-16 based at least in part on the one or more instructions.

[0286] Aspect 32: An apparatus for wireless communication in a first wireless device, the apparatus comprising at least one means for performing the method of any of aspects 1-16.

[0287] Aspect 33: A non-transitory computer-readable medium storing code for wireless communication in a first wireless device, the code comprising instructions executable by a processor to perform the method of any of aspects 1-16.

[0288] Aspect 34: An apparatus for wireless communication in a first wireless device, comprising: a processor; a memory coupled to the processor; and one or more instructions stored in the memory, the one or more instructions executable by the processor to cause the apparatus to perform any of the methods of aspects 17-30 based at least in part on the one or more instructions.

[0289] Aspect 35: An apparatus for wireless communication in a first wireless device, comprising at least one means for performing the method of any of aspects 17-30.

[0290] Aspect 36: A non-transitory computer-readable medium storing code for wireless communication in a first wireless device, the code comprising instructions executable by a processor to perform the method of any of aspects 17-30.

[0291] It should be noted that the methods described herein describe possible implementations, that the operations and steps may be rearranged or otherwise modified, and that other implementations are possible. Furthermore, aspects from two or more of these methods may be combined.

[0292] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described as examples, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used throughout much of the description, the techniques described herein may be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR. For example, the techniques described may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0293] The information and signals described herein may be represented using any of a wide variety of technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0294] The various example blocks and components described in connection with the disclosure herein may be implemented or performed using a general purpose processor, a DSP, an ASIC, a CPU, 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 alternatively, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0295] The functions described herein may be implemented in hardware, software executed by a processor, or any combination thereof. Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, should be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, or functions. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be performed using software executed by a processor, hardware, hardwiring, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed so that portions of the functions are implemented in different physical locations.

[0296] Computer-readable media includes both non-transitory computer storage media and communication media, including any medium that facilitates transfer of a computer program from one place to another. Non-transitory storage media may be any available medium that can be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, Electrically Erasable Programmable Read Only Memory (EEPROM), Flash memory, phase-change memory, compact disc (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer or processor. Also, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included within the definition of computer-readable media. As used herein, disk and disc include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray® discs, where disks typically reproduce data magnetically and discs reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0297] As used herein, including in the claims, "or" used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such as, 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 (e.g., A and B and C). Also, the phrase "based on" as used herein should not be construed 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" is to be interpreted the same as the phrase "based at least in part on." As used herein, the term "and / or," when used in a list of two or more items, means that any one of the listed items may be employed alone, or any combination of two or more of the listed items may be employed. For example, if a composition is described as containing components A, B, and / or C, the composition may contain only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, or a combination of A, B, and C.

[0298] The terms "determine" or "determining" encompass a wide variety of actions, and thus "determining" can include calculating, computing, processing, deriving, investigating, looking up (e.g., via a lookup in a table, database, or another data structure), ascertaining, etc. "Determining" can also include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc. "Determining" can also include resolving, selecting, choosing, establishing, and other similar acts.

[0299] In the accompanying figures, similar components or features may have the same reference label. Furthermore, various components of the same type may be distinguished by following the reference label with a dash and a second label that distinguishes between the similar components. If only a first reference label is used herein, the description is applicable to any of the similar components having the same first reference label, regardless of a second reference label, or other subsequent reference label.

[0300] The descriptions set forth herein with reference to the accompanying drawings describe exemplary configurations and do not necessarily represent all examples that may be implemented or fall within the scope of the claims. As used herein, the term "example" means "serving as an example, instance, or illustration" and does not mean "preferred" or "advantageous over other examples." The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0301] The description herein is provided to enable any person skilled in the art to make or use the disclosure. Various modifications of the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. 1. A method for wireless communication in a first wireless device, comprising: transmitting a message to a second wireless device indicating an ability of the first wireless device to support full-duplex line-of-sight (LOS) multiple-input multiple-output (MIMO) communications; receiving control signaling from the second wireless device in response to the message, the control signaling indicating allocated uplink channel resources for one or more uplink communications, allocated downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time or in both time and frequency; communicating the one or more uplink communications over the uplink channel resources according to a first set of the one or more LOS MIMO transmission modes and communicating the one or more downlink communications over the downlink channel resources according to a second set of the one or more LOS MIMO transmission modes based at least in part on the control signaling; A method comprising:

2. receiving the control signaling; receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources; receiving a second control message from the second wireless device indicating a first channel resource pairing of the plurality of channel resource pairings including the uplink channel resource and the downlink channel resource; The method of claim 1 , comprising:

3. receiving the control signaling; receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of transmission configuration indication states; receiving a second control message from the second wireless device indicating one or both of a first transmission configuration indication state of the plurality of transmission configuration indication states to be used for the one or more uplink communications or a second transmission configuration indication state of the plurality of transmission configuration indication states to be used for the one or more downlink communications; The method of claim 1 , comprising:

4. receiving the control signaling; receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations; receiving a second control message from the second wireless device indicating one or both of a first polarization of the plurality of polarizations to be used for transmission of the one or more uplink communications or a second polarization of the plurality of polarizations to be used for transmission of the one or more downlink communications; The method of claim 1 , comprising:

5. receiving the control signaling; receiving a first control message from the second wireless device indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes; receiving a second control message from the second wireless device indicating one or both of a first precoding scheme of the plurality of precoding schemes to be used for transmitting the one or more uplink communications or a second precoding scheme of the plurality of precoding schemes to be used for transmitting the one or more downlink communications; The method of claim 1 , comprising:

6. receiving the control signaling; 2. The method of claim 1, comprising receiving the control signaling indicating a first set of the one or more LOS MIMO transmission modes to be used for the one or more uplink communications, wherein the first set of one or more LOS MIMO transmission modes corresponds to the uplink channel resources to be used for transmission of the one or more uplink communications, a transmission priority of the one or more uplink communications, a quality of service threshold associated with the one or more uplink communications, a precoding scheme to be used for transmission of the one or more uplink communications, or a combination thereof.

7. receiving the control signaling; 2. The method of claim 1, comprising receiving the control signaling indicating a second set of the one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the second set of one or more LOS MIMO transmission modes corresponds to the downlink channel resources to be used for transmission of the one or more downlink communications, a transmission priority of the one or more downlink communications, a quality of service threshold associated with the one or more downlink communications, a precoding scheme to be used for transmission of the one or more downlink communications, or a combination thereof.

8. receiving the control signaling; 2. The method of claim 1, comprising receiving the control signaling indicating a first set of one or more polarizations to be used for transmission of the one or more uplink communications, a second set of one or more polarizations to be used for transmission of the one or more downlink communications, or both.

9. receiving the control signaling; 2. The method of claim 1, comprising receiving the control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, the pattern corresponding to a transport block size of the one or more uplink communications, a quality of service threshold associated with the one or more uplink communications, a priority level of the one or more uplink communications, a transmission configuration indication state to be used for the one or more uplink communications, or a combination thereof.

10. receiving the control signaling; 2. The method of claim 1, comprising receiving the control signaling indicating a pattern of LOS MIMO transmission modes to be used for the one or more downlink communications, the pattern corresponding to a transport block size of the one or more downlink communications, a quality of service threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a transmission configuration indication state to be used for the one or more downlink communications, or a combination thereof.

11. receiving the control signaling; 2. The method of claim 1, comprising receiving the control signaling indicating an uplink repetition number for the one or more uplink communications, a downlink repetition number for the one or more downlink communications, a mapping between a first set of the one or more LOS MIMO transmission modes and the uplink repetition number, a mapping between a second set of the one or more LOS MIMO transmission modes and the downlink repetition number, or a combination thereof.

12. receiving the control signaling; 2. The method of claim 1, comprising receiving one or more of a radio resource control message or an instance of downlink control information indicating the uplink channel resources, the downlink channel resources, the first set of one or more LOS MIMO transmission modes, the second set of one or more LOS MIMO transmission modes, or a combination thereof.

13. communicating the one or more uplink communications and the one or more downlink communications; 10. The method of claim 1, comprising communicating the one or more uplink communications and the one or more downlink communications in accordance with a Slepian-based precoding scheme or a Legendre-based precoding scheme.

14. communicating the one or more uplink communications and the one or more downlink communications; 10. The method of claim 1, comprising communicating the one or more uplink communications and the one or more downlink communications using a uniform linear array structure, a uniform rectangular array structure, a uniform circular array structure, or a uniform planar array structure.

15. 1. A method for wireless communication in a first wireless device, comprising: receiving a message from a second wireless device indicating an ability of the second wireless device to support full-duplex line-of-sight (LOS) multiple-input multiple-output (MIMO) communications; transmitting control signaling based at least in part on receiving the message from the second wireless device, the control signaling indicating allocated uplink channel resources for one or more uplink communications, allocated downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time or in both time and frequency; communicating the one or more uplink communications over the uplink channel resources according to a first set of the one or more LOS MIMO transmission modes and communicating the one or more downlink communications over the downlink channel resources according to a second set of the one or more LOS MIMO transmission modes based at least in part on the control signaling; A method comprising:

16. transmitting the control signaling transmitting a first control message indicating mapping between a plurality of LOS MIMO transmission modes and a plurality of channel resource pairings, each channel resource pairing including a respective uplink channel resource of a plurality of uplink channel resources and a respective downlink channel resource of a plurality of downlink channel resources; transmitting a second control message indicating a first channel resource pairing of the plurality of channel resource pairings including the uplink channel resource and the downlink channel resource; 16. The method of claim 15, comprising:

17. transmitting the control signaling Transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of transmission configuration indication states; and transmitting a second control message indicating one or both of a first transmission configuration indication state to be used for the one or more uplink communications or a second transmission configuration indication state to be used for the one or more downlink communications.

18. transmitting the control signaling Transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of polarizations; transmitting a second control message indicating one or both of a first polarization of the plurality of polarizations to be used for transmission of the one or more uplink communications or a second polarization of the plurality of polarizations to be used for transmission of the one or more downlink communications; 16. The method of claim 15, comprising:

19. transmitting the control signaling Transmitting a first control message indicating a mapping between a plurality of LOS MIMO transmission modes and a plurality of precoding schemes; transmitting a second control message indicating one or both of a first precoding scheme of the plurality of precoding schemes to be used for transmission of the one or more uplink communications or a second precoding scheme of the plurality of precoding schemes to be used for transmission of the one or more downlink communications; 16. The method of claim 15, comprising:

20. transmitting the control signaling transmitting the control signaling indicating a first set of the one or more LOS MIMO transmission modes to be used for the one or more uplink communications, wherein the first set of one or more LOS MIMO transmission modes corresponds to the uplink channel resources to be used for transmission of the one or more uplink communications, a transmission priority of the one or more uplink communications, a quality of service threshold associated with the one or more uplink communications, a precoding scheme to be used for transmission of the one or more uplink communications, or a combination thereof.

16. The method of claim 15.

21. transmitting the control signaling 16. The method of claim 15, comprising transmitting the control signaling indicating a second set of the one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the second set of one or more LOS MIMO transmission modes corresponds to the downlink channel resources to be used for transmission of the one or more downlink communications, a transmission priority of the one or more downlink communications, a quality of service threshold associated with the one or more downlink communications, a precoding scheme to be used for the one or more downlink communications, or a combination thereof.

22. transmitting the control signaling 16. The method of claim 15, comprising transmitting the control signaling indicating a first set of one or more polarizations to be used for transmission of the one or more uplink communications, a second set of one or more polarizations to be used for transmission of the one or more downlink communications, or both.

23. transmitting the control signaling 16. The method of claim 15, comprising transmitting the control signaling indicating a pattern of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, the pattern corresponding to a transport block size of the one or more uplink communications, a quality of service threshold associated with the one or more uplink communications, a priority level of the one or more uplink communications, a transmission configuration indication state to be used for the one or more uplink communications, or a combination thereof.

24. transmitting the control signaling 16. The method of claim 15, comprising transmitting the control signaling indicating a pattern of LOS MIMO transmission modes to be used for the one or more downlink communications, the pattern corresponding to a transport block size of the one or more downlink communications, a quality of service threshold associated with the one or more downlink communications, a priority level of the one or more downlink communications, a transmission configuration indication state to be used for the one or more downlink communications, or a combination thereof.

25. transmitting the control signaling 16. The method of claim 15, comprising transmitting the control signaling indicating an uplink repetition number for the one or more uplink communications, a downlink repetition number for the one or more downlink communications, a mapping between the first set of the one or more LOS MIMO transmission modes and the uplink repetition number, a mapping between the second set of the one or more LOS MIMO transmission modes and the downlink repetition number, or a combination thereof.

26. transmitting the control signaling 16. The method of claim 15, comprising transmitting one or more of a radio resource control message or an instance of downlink control information indicating the uplink channel resources, the downlink channel resources, the first set of one or more LOS MIMO transmission modes, the second set of one or more LOS MIMO transmission modes, or a combination thereof.

27. determining an interference estimate based at least in part on the first set of one or more LOS MIMO transmission modes and the second set of one or more LOS MIMO transmission modes; compensating the one or more downlink communications, the one or more uplink communications, or both based at least in part on the interference estimate; 16. The method of claim 15, further comprising:

28. 1. An apparatus for wireless communication in a first wireless device, comprising: a processor; a memory coupled to the processor; one or more instructions stored in the memory; Equipped with The one or more instructions cause the device to, based at least in part on the one or more instructions: transmitting a message to a second wireless device indicating an ability of the first wireless device to support full-duplex line-of-sight (LOS) multiple-input multiple-output (MIMO) communications; receive control signaling from the second wireless device in response to the message, the control signaling indicating allocated uplink channel resources for one or more uplink communications, allocated downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, the uplink channel resources at least partially overlapping with the downlink channel resources in time or in both time and frequency; communicating the one or more uplink communications over the uplink channel resources in accordance with a first set of the one or more LOS MIMO transmission modes and communicating the one or more downlink communications over the downlink channel resources in accordance with a second set of the one or more LOS MIMO transmission modes based at least in part on the control signaling; Executable by the processor to: Device.

29. 1. An apparatus for wireless communication in a first wireless device, comprising: a processor; a memory coupled to the processor; one or more instructions stored in the memory; Equipped with The one or more instructions cause the device to, based at least in part on the one or more instructions: receiving a message from a second wireless device indicating an ability of the second wireless device to support full-duplex line-of-sight (LOS) multiple-input multiple-output (MIMO) communications; transmit, based at least in part on receiving the message from the second wireless device, control signaling indicating allocated uplink channel resources for one or more uplink communications, allocated downlink channel resources for one or more downlink communications, a first set of one or more LOS MIMO transmission modes to be used for the one or more uplink communications, and a second set of one or more LOS MIMO transmission modes to be used for the one or more downlink communications, wherein the uplink channel resources at least partially overlap with the downlink channel resources in time or in both time and frequency; communicating the one or more uplink communications over the uplink channel resources in accordance with a first set of the one or more LOS MIMO transmission modes and communicating the one or more downlink communications over the downlink channel resources in accordance with a second set of the one or more LOS MIMO transmission modes based at least in part on the control signaling; Executable by the processor to: Device.

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