Beamforming channel busy rate

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may measure a first channel busy ratio (CBR) for a first beam group of a set of beam groups associated with the UE. The UE may receive an indication of a second CBR for a second beam group associated with the second UE from a second UE. The UE may transmit a signal to the second UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR. Numerous other aspects are described.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This patent application claims priority to U.S. Non-provisional Patent Application No. 17 / 167,607, filed February 4, 2021, entitled "BEAMFORMED CHANNEL BUSY RATIO," which is expressly incorporated by reference into this specification.

[0002] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for beamforming channel busy ratio (CBR). [Background technology]

[0003]

[0003] Wireless communication systems have been widely deployed to provide various telecommunication services, such as telephone, video, data, messaging, and broadcast. A typical wireless communication system may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of extensions to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the 3rd Generation Partnership Project (3GPP).

[0004] A wireless network may include several base stations (BSs) that can support communication for several user equipments (UEs). The UEs may communicate with the BSs via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a new radio (NR) BS, a 5G Node B, etc.

[0005]

[0005] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that allows different user equipment to communicate on a city, national, regional, or even global scale. NR, sometimes referred to as 5G, is a set of extensions to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, lowering costs, improving services, utilizing new spectrum, and better integrating with other open standards using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink (DL) and CP-OFDM and / or SC-FDM (also known as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to grow, further developments in LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0006]

[0006] In some aspects, a user equipment (UE) for wireless communication includes a memory and one or more processors operably coupled to the memory, where the memory and the one or more processors are configured to: measure, for a first beam group of a set of beam groups associated with the UE, a first channel busy ratio (CBR) for the first beam group; receive from a second UE an indication of a second CBR for a second beam group associated with the second UE; and transmit a signal to the second UE using a beam included in the first beam group using one or more transmit parameters based at least in part on at least one of the first CBR or the second CBR.

[0007]

[0007] In some aspects, a method of wireless communication performed by a UE includes measuring a first CBR for a first beam group of a set of beam groups associated with the UE, receiving an indication of a second CBR for a second beam group associated with the second UE from a second UE, and transmitting a signal to the second UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0008]

[0008] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communications includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to measure a first CBR for a first beam group of a set of beam groups associated with the UE, receive an indication from a second UE of a second CBR for a second beam group associated with the second UE, and transmit a signal to the second UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0009]

[0009] In some aspects, an apparatus for wireless communications includes means for measuring, for a first beam group of a set of beam groups associated with the apparatus, a first CBR for the first beam group, means for receiving from the UE an indication of a second CBR for a second beam group associated with the UE, and means for transmitting a signal to the UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0010]

[0010] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems substantially as described in this specification with reference to and as illustrated by the drawings and specification.

[0011]

[0011] The above has outlined rather broadly the features and technical advantages of the examples according to the present disclosure so that the following detailed description may be better understood. Additional features and advantages are described below. The concepts and examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both their organization and the method of operation, together with associated advantages, will be better understood from the following description when considered in conjunction with the accompanying figures. Each of the figures is provided for illustration and description, and not as a definition of the limits of the claims.

[0012]

[0012] In order that the above-mentioned features of the present disclosure may be understood in detail, a more specific description briefly summarized above may be obtained by referring to the embodiments, some of which are shown in the attached drawings. However, it should be noted that the attached drawings show only some typical embodiments of the present disclosure, and therefore should not be considered as limiting the scope of the present disclosure, since the description may lead to other equally effective embodiments. The same reference numbers in different drawings may identify the same or similar elements. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 illustrates an example of a wireless network. [Diagram 2]

[0014] 1 illustrates an example of a base station in communication with a UE in a wireless network. [Diagram 3]

[0015] FIG. 1 illustrates an example beamforming architecture that supports beamforming for communication. [Figure 4]

[0016] FIG. 1 is a diagram showing an example of sidelink communication. [Diagram 5]

[0017] FIG. 1 illustrates an example of side link communication and access link communication. [Figure 6]

[0018] FIG. 13 is a diagram showing an example of a beam group. [Figure 7]

[0019] FIG. 1 illustrates an example of a sidelink communication network. [Figure 8A]

[0020] FIG. 1 illustrates an example associated with a beamforming channel busy ratio (CBR) in accordance with various aspects of the present disclosure. [Figure 8B] FIG. 1 illustrates an example associated with a beamforming channel busy ratio (CBR) in accordance with various aspects of the present disclosure. [Figure 8C] FIG. 1 illustrates an example associated with a beamforming channel busy ratio (CBR) in accordance with various aspects of the present disclosure. [Figure 9]

[0021] FIG. 2 illustrates an example associated with beamforming CBR, in accordance with various aspects of the present disclosure. [Figure 10] FIG. 2 illustrates an example associated with beamforming CBR, in accordance with various aspects of the present disclosure. [Figure 11]

[0022] 1 illustrates an example process associated with beamforming CBR, in accordance with various aspects of the present disclosure. [Figure 12]

[0023] 1 is a block diagram of an example apparatus for wireless communication in accordance with various aspects of the present disclosure. [Figure 13] 1 is a block diagram of an example apparatus for wireless communication in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014]

[0024] Various aspects of the disclosure are described more fully below with reference to the accompanying drawings. However, the disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout the disclosure. Rather, these aspects are provided so that the disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should appreciate that the scope of the disclosure covers any aspect of the disclosure disclosed herein, whether implemented independently of other aspects of the disclosure or in combination with other aspects of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects described herein. Furthermore, the scope of the disclosure is intended to cover such an apparatus or method practiced using other structures, functions, or structures and functions in addition to or other than the various aspects of the disclosure described herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

[0015]

[0025] Several aspects of a telecommunications system are now presented with reference to various apparatus and techniques that are described in the detailed description that follows and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0016]

[0026] It should be noted that although aspects may be described herein using terminology commonly associated with 5G or NR radio access technologies (RATs), aspects of the present disclosure may apply to other RATs, such as 3G RATs, 4G RATs, and / or RATs subsequent to 5G (e.g., 6G).

[0017]

[0027] FIG. 1 illustrates an example of a wireless network 100. The wireless network 100 may be or include an element of a 5G (NR) network and / or an LTE network, among other examples. The wireless network 100 may include several base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, transmit / receive point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a coverage area of ​​a BS and / or a BS subsystem serving this coverage area, depending on the context in which the term is used.

[0018]

[0028] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a few kilometers in radius) and may allow unrestricted access by UEs with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs with an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In the example shown in FIG. 1, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or multiple (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” may be used interchangeably herein.

[0019]

[0029] In some aspects, the cells may not necessarily be fixed and the geographic area of ​​the cells may move according to the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in wireless network 100 through various types of backhaul interfaces, such as direct physical connections or virtual networks, using any suitable transport network.

[0020]

[0030] The wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send the transmission of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. In the example shown in FIG. 1, a relay BS 110d may communicate with a BS 110a and a UE 120d to enable communication between the macro BS 110a and the UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a relay, etc.

[0021]

[0031] The wireless network 100 may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5-40 watts), while a pico BS, femto BS, and relay BS may have a lower transmit power level (e.g., 0.1-2 watts).

[0022]

[0032] A network controller 130 may couple to a set of BSs and provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other directly or indirectly via wireless or wireline backhaul.

[0023]

[0033] The UEs 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate over a wireless or wired medium.

[0024]

[0034] Some UEs may be considered as machine type communication (MTC) UEs or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and eMTC UEs include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, and / or a location tag that may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network, such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). The UE 120 may be included in a housing that stores components of the UE 120, such as a processor component and / or a memory component. In some aspects, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0025]

[0035] Generally, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. The RAT may also be referred to as a radio technology, an air interface, etc. The frequencies may also be referred to as a carrier, a frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0026]

[0036] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using a base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, vehicle-to-everything (V2X) protocols (which may include, e.g., vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), and / or mesh networks. In this case, the UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110.

[0027]

[0037] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various classes, bands, channels, etc., based on frequency or wavelength. For example, the devices of the wireless network 100 may communicate using an operating band having a first frequency range (FR1), which may range from 410 MHz to 7.125 GHz, and / or may communicate using an operating band having a second frequency range (FR2), which may range from 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. FR1 is often referred to as the "sub-6 GHz" band, although a portion of FR1 is greater than 6 GHz. Similarly, FR2 is often referred to as "millimeter wave" even though it is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) identified as the "millimeter wave" band by the International Telecommunications Union (ITU). Thus, unless otherwise specified, it should be understood that terms such as "sub-6 GHz," as used herein, may broadly refer to frequencies below 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specified, it should be understood that terms such as "millimeter wave," as used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and that the techniques described herein are applicable to those modified frequency ranges.

[0028]

[0038] As noted above, Figure 1 is provided as an example. Other examples may differ from those described with respect to Figure 1.

[0029]

[0039] 2 is a diagram showing an example base station 200 in communication with a UE 120 in wireless network 100. The base station 110 may be equipped with T antennas 234a through 234t, and the UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0030]

[0040] At the base station 110, a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCSs) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the selected MCS(es) for that UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or higher layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0031]

[0041] At the UE 120, antennas 252a-252r may receive downlink signals from the base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a-254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control and system information to a controller / processor 280. The term “controller / processor” may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, among other examples. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0032]

[0042] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0033]

[0043] An antenna (e.g., antennas 234a-t and / or antennas 252a-r) may include or be included within one or more antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays, among other examples. An antenna panel, antenna group, set of antenna elements, and / or antenna array may include one or more antenna elements. An antenna panel, antenna group, set of antenna elements, and / or antenna array may include a set of coplanar antenna elements and / or a set of non-coplanar antenna elements. An antenna panel, antenna group, set of antenna elements, and / or antenna array may include antenna elements in a single housing and / or antenna elements in multiple housings. An antenna panel, antenna group, set of antenna elements, and / or antenna array may include one or more antenna elements coupled to one or more transmitting and / or receiving components, such as one or more components of FIG. 2.

[0034]

[0044] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by modulators 254a-254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulators and demodulators (e.g., MOD / DEMOD 254) of the UE 120 may be included within a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, a modulator and / or demodulator 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to implement aspects of any of the methods described herein, for example, as described with reference to Figures 8A, 8B, 8C, 9, 10, and / or 11.

[0035]

[0045] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by a MIMO detector 236, if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate to the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communication. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included within a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modulators and / or demodulators 232, MIMO detectors 236, receive processors 238, transmit processors 220, and / or TX MIMO processors 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to implement aspects of any of the methods described herein, for example, as described with reference to Figures 8A, 8B, 8C, 9, 10, and / or 11.

[0036]

[0046] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other components of FIG. 2 may perform one or more techniques associated with beamforming channel busy ratio (CBR), as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other component(s) of FIG. 2 may, for example, perform or direct the operation of the process 1100 of FIG. 11 and / or other processes described herein. The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. In some aspects, the memory 242 and / or the memory 282 may include a non-transitory computer-readable medium that stores one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of the base station 110 and / or the UE 120 (e.g., directly or after compiling, translating, and / or interpreting), may cause the one or more processors, the UE 120, and / or the base station 110 to perform or direct operations of, for example, process 1100 of FIG. 11 and / or other processes described herein. In some aspects, executing the instructions may include running the instructions, translating the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.

[0037]

[0047] In some aspects, the UE 120 includes, for a first beam group of the set of beam groups associated with the UE 120, means for measuring a CBR for the first beam group, means for receiving an indication of a second CBR for a second beam group associated with the second UE from a second UE, and / or means for transmitting a signal to the second UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR. The means for the UE 120 to perform the operations described herein may include, for example, one or more of the antenna 252, the demodulator 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the modulator 254, the controller / processor 280, or the memory 282.

[0038]

[0048] In some aspects, UE 120 includes means for receiving an indication from the second UE or one or more other UEs of a number of resources used or utilized to receive a signal by the second UE or one or more other UEs using a beam included in the first beam group or another beam, and / or means for determining a first CBR for the first beam group based at least in part on the number of resources used or utilized to receive a signal by the second UE or one or more other UEs.

[0039]

[0049] In some aspects, the UE 120 includes means for receiving the indication via at least one of an announcement message or a physical sidelink feedback channel signal.

[0040]

[0050] In some aspects, the UE 120 includes means for determining one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0041]

[0051] In some aspects, the UE 120 includes means for determining a highest CBR among the first CBR and the second CBR, and / or means for determining one or more transmission parameters based at least in part on the highest CBR.

[0042]

[0052] In some aspects, UE 120 includes means for determining a first transmission parameter included in the one or more transmission parameters based at least in part on the first CBR and / or means for determining a second transmission parameter included in the one or more transmission parameters based at least in part on the second CBR.

[0043]

[0053] In some aspects, UE 120 includes means for receiving from the third UE an indication of a third CBR for a third beam group associated with the third UE, and / or means for transmitting a different signal to the third UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the third CBR.

[0044]

[0054] 2 are shown as separate components, the functionality described above with respect to those blocks may be implemented in a single hardware, software, or combination component, or in various combinations of components. For example, functionality described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0045]

[0055] As noted above, Figure 2 is provided as an example. Other examples may differ from those described with respect to Figure 2.

[0046]

[0056] 3 is a diagram illustrating an example beamforming architecture 300 that supports beamforming for communications. In some aspects, the architecture 300 may implement aspects of the wireless network 100. In some aspects, the architecture 300 may be implemented in a transmitting device (e.g., a first wireless communication device, UE, or base station) and / or a receiving device (e.g., a second wireless communication device, UE, or base station) as described herein.

[0047]

[0057] Broadly, FIG. 3 illustrates an exemplary hardware component of a wireless communication device according to an aspect of the present disclosure. The components shown may include those that may be used for antenna element selection and / or for beamforming for transmission of wireless signals. Numerous architectures exist for implementing antenna element selection and phase shifting, only one example of which is shown here. The architecture 300 includes a modem (modulator / demodulator) 302, a digital-to-analog converter (DAC) 304, a first mixer 306, a second mixer 308, and a splitter 310. The architecture 300 also includes a plurality of first amplifiers 312, a plurality of phase shifters 314, a plurality of second amplifiers 316, and an antenna array 318 including a plurality of antenna elements 320.

[0048]

[0058] Transmission lines, or other waveguides, wires, and / or traces, etc., connecting various components are shown to illustrate how transmitted signals may travel between components. Reference numerals 322, 324, 326, and 328 indicate areas within architecture 300 where different types of signals travel or are processed. Specifically, reference numeral 322 indicates an area where digital baseband signals travel or are processed, reference numeral 324 indicates an area where analog baseband signals travel or are processed, reference numeral 326 indicates an area where analog intermediate frequency (IF) signals travel or are processed, and reference numeral 328 indicates an area where analog radio frequency (RF) signals travel or are processed. The architecture also includes a local oscillator A 330, a local oscillator B 332, and a controller / processor 334. In some aspects, the controller / processor 334 may correspond to the base station controller / processor 240 described above in connection with FIG. 2 and / or the UE controller / processor 280 described above in connection with FIG. 2.

[0049]

[0059] Each of the antenna elements 320 may include one or more sub-elements for radiating or receiving RF signals. For example, a single antenna element 320 may include a first sub-element cross-polarized with a second sub-element that may be used to independently transmit a cross-polarized signal. The antenna elements 320 may include patch antennas, dipole antennas, or other types of antennas arranged in a linear, two-dimensional, or other pattern. The spacing between the antenna elements 320 may be such that signals having desired wavelengths transmitted separately by the antenna elements 320 may interact or interfere (e.g., to form a desired beam). For example, given an expected range of wavelengths or frequencies, the spacing may provide a quarter wavelength, half wavelength, or other fraction of the wavelength of the spacing between adjacent antenna elements 320 to allow for interaction or interference of signals transmitted by separate antenna elements 320 that are within the expected range.

[0050]

[0060] The modem 302 may process and generate digital baseband signals and control the operation of the DAC 304, the first and second mixers 306, 308, the splitter 310, the first amplifier 312, the phase shifter 314, and / or the second amplifier 316 to transmit the signals via one or more or all of the antenna elements 320. The modem 302 may process signals and control the operation in accordance with a communication standard, such as the wireless standard discussed herein. The DAC 304 may convert the digital baseband signal received (transmitted) from the modem 302 to an analog baseband signal. The first mixer 306 upconverts the analog baseband signal to an analog IF signal in the IF using the local oscillator A 330. For example, the first mixer 306 may mix a signal with an oscillator signal generated by the local oscillator A 330 to "shift" the baseband analog signal to the IF. In some cases, some processing or filtering (not shown) may be performed at the IF. The second mixer 308 upconverts the analog IF signal to an analog RF signal using local oscillator B 332. Similar to the first mixer, the second mixer 308 may mix the signal with an oscillator signal generated by local oscillator B 332 to "shift" the IF analog signal to the RF or frequency at which the signal is to be transmitted or received. The modem 302 and / or the controller / processor 334 may adjust the frequency of local oscillator A 330 and / or local oscillator B 332 such that a desired IF and / or RF frequency is generated and used to facilitate processing and transmission of signals within a desired bandwidth.

[0051]

[0061] In the depicted architecture 300, the signal upconverted by the second mixer 308 is split or duplicated into multiple signals by the splitter 310. The splitter 310 in the architecture 300 splits the RF signal into multiple identical or nearly identical RF signals. In other examples, the splitting can be done using any type of signal, including using baseband digital, baseband analog, or IF analog signals. Each of these signals can correspond to an antenna element 320, and the signal travels through and is processed by the amplifiers 312, 316, phase shifter 314, and / or other elements corresponding to the respective antenna element 320 in order to be provided to and transmitted by a corresponding antenna element 320 of the antenna array 318. In one example, the splitter 310 can be an active splitter that is connected to a power source and provides some gain so that the RF signal leaving the splitter 310 is at a power level equal to or greater than the signal entering the splitter 310. In another example, the splitter 310 is a passive splitter that is not connected to a power source. The RF signal exiting the splitter 310 may be at a lower power level than the RF signal entering the splitter 310 .

[0052]

[0062] After being split by the splitter 310, the resulting RF signal may enter an amplifier, such as the first amplifier 312, corresponding to the antenna element 320, or a phase shifter 314. The first and second amplifiers 312, 316 are shown with dashed lines since one or both may not be necessary in some embodiments. In some embodiments, both the first amplifier 312 and the second amplifier 316 are present. In some embodiments, neither the first amplifier 312 nor the second amplifier 316 are present. In some embodiments, one of the two amplifiers 312, 316 is present but the other is not. As an example, if the splitter 310 is an active splitter, the first amplifier 312 may not be used. As a further example, if the phase shifter 314 is an active phase shifter that can provide gain, the second amplifier 316 may not be used.

[0053]

[0063] The amplifiers 312, 316 may provide a desired level of positive or negative gain. A positive gain (positive dB) may be used to increase the amplitude of the signal for radiation by a particular antenna element 320. A negative gain (negative dB) may be used to decrease the amplitude of the signal and / or suppress radiation by a particular antenna element. Each of the amplifiers 312, 316 may be independently controlled (e.g., by the modem 302 or the controller / processor 334) to provide independent control of the gain for each antenna element 320. For example, the modem 302 and / or the controller / processor 334 may have at least one control line connected to each of the splitter 310, the first amplifier 312, the phase shifter 314, and / or the second amplifier 316 that may be used to configure the gain to provide a desired amount of gain for each component and thus each antenna element 320.

[0054]

[0064] The phase shifters 314 may provide a configurable phase shift or offset to the corresponding RF signal being transmitted. The phase shifters 314 may be passive phase shifters that are not directly connected to a power source. A passive phase shifter may introduce some insertion loss. The second amplifier 316 may boost the signal to compensate for the insertion loss. The phase shifters 314 may be active phase shifters that are connected to a power source to provide some amount of gain or prevent insertion loss. The settings of each of the phase shifters 314 are independent, meaning that each may be independently set to provide a desired amount of phase shift, or the same amount of phase shift, or some other configuration. The modem 302 and / or the controller / processor 334 may have at least one control line connected to each of the phase shifters 314 and that may be used to configure the phase shifters 314 to provide a desired amount of phase shift or phase offset between the antenna elements 320.

[0055]

[0065] In the illustrated architecture 300, RF signals received by the antenna elements 320 are provided to one or more first amplifiers 356 to boost signal strength. The first amplifiers 356 may be connected to the same antenna array 318 (e.g., for time division duplex (TDD) operation). The first amplifiers 356 may be connected to different antenna arrays 318. The boosted RF signals are input to one or more phase shifters 354 to provide a configurable phase shift or phase offset to the corresponding received RF signals to enable reception via one or more Rx beams. The phase shifters 354 may be active or passive phase shifters. The settings of the phase shifters 354 are independent, meaning that each may be independently set to provide a desired amount of phase shift, or the same amount of phase shift, or some other configuration. The modem 302 and / or the controller / processor 334 may have at least one control line connected to each of the phase shifters 354 and used to configure the phase shifters 354 to provide a desired amount of phase shift or phase offset between the antenna elements 320 to enable reception via one or more Rx beams.

[0056]

[0066] The output of the phase shifter 354 may be input to one or more second amplifiers 352 for signal amplification of the phase shifted received RF signal. The second amplifiers 352 may be individually configured to provide a configured amount of gain. The second amplifiers 352 may be individually configured to provide an amount of gain that ensures that the signals input to the combiner 350 have the same magnitude. Amplifiers 352 and / or 356 are shown in dashed lines since they may not be necessary in some embodiments. In some embodiments, both amplifier 352 and amplifier 356 are present. In other embodiments, neither amplifier 352 nor amplifier 356 are present. In other embodiments, one of amplifiers 352, 356 is present but the other is not present.

[0057]

[0067] In the illustrated architecture 300, the signals output by the phase shifters 354 (through the amplifiers 352, if present) are combined in a combiner 350. The combiner 350 in the architecture 300 combines the RF signals into a signal. The combiner 350 may be a passive combiner (e.g., not connected to a power source) that may provide some insertion loss. The combiner 350 may be an active combiner (e.g., connected to a power source) that may provide some signal gain. When the combiner 350 is an active combiner, it may provide a different (e.g., configurable) amount of gain for each input signal so that when the input signals are combined, they have the same magnitude. When the combiner 350 is an active combiner, the combiner 350 may not require a second amplifier 352 because the active combiner may provide signal amplification.

[0058]

[0068] The output of combiner 350 is input to mixers 348 and 346. Mixers 348 and 346 typically downconvert the received RF signal using inputs from local oscillators 372 and 370, respectively, to generate an intermediate or baseband signal that carries the coded and modulated information. The outputs of mixers 348 and 346 are input to analog-to-digital converter (ADC) 344 for conversion to an analog signal. The analog signal output from ADC 344 is input to modem 302 for baseband processing, such as decoding and / or deinterleaving.

[0059]

[0069] The architecture 300 is provided solely by way of example to illustrate an architecture for transmitting and / or receiving signals. In some cases, the architecture 300, and / or portions of the architecture 300, may be repeated multiple times within the architecture to accommodate or provide any number of RF chains, antenna elements, and / or antenna panels. Additionally, numerous alternative architectures are possible and contemplated. For example, while only one antenna array 318 is shown, two, three, or more antenna arrays may be included, each with its own corresponding one or more of amplifiers, phase shifters, splitters, mixers, DACs, ADCs, and / or modems. For example, a single UE may include two, four, or more antenna arrays to transmit or receive signals at different physical locations on the UE or in different directions.

[0060]

[0070] Furthermore, the mixers, splitters, amplifiers, phase shifters, and other components may be located in different signal type areas (e.g., represented by different ones of reference numbers 322, 324, 326, 328) in different implemented architectures. For example, the splitting of a signal to be transmitted into multiple signals may be performed at analog RF, analog IF, analog baseband, or digital baseband frequencies in different examples. Similarly, the amplification and / or phase shifting may also be performed at different frequencies. For example, in some aspects, one or more of the splitter 310, amplifiers 312, 316, or phase shifter 314 may be located between the DAC 304 and the first mixer 306, or between the first mixer 306 and the second mixer 308. In one example, the functions of one or more of the components may be combined into one component. For example, the phase shifter 314 may include or replace the first and / or second amplifiers 312, 316 to perform the amplification. As another example, phase shifting may be performed by the second mixer 308 to eliminate the need for a separate phase shifter 314. This technique is sometimes referred to as local oscillator (LO) phase shifting. In some aspects of this configuration, multiple IF-to-RF mixers (e.g., for each antenna element chain) may be present in the second mixer 308, and the local oscillator B 332 may provide a different local oscillator signal (with a different phase offset) to each IF-to-RF mixer.

[0061]

[0071] The modem 302 and / or the controller / processor 334 may control one or more of the other components 304-372 to select one or more antenna elements 320 and / or to form a beam for transmission of one or more signals. For example, the antenna elements 320 may be individually selected or deselected for transmission of a signal(s) by controlling the amplitude of one or more corresponding amplifiers, such as the first amplifier 312 and / or the second amplifier 316. Beamforming involves the generation of a beam using multiple signals on different antenna elements, where one or more or all of the multiple signals are phase shifted with respect to each other. The formed beam may carry a physical layer or higher layer reference signal or information. As each signal of the multiple signals radiates from a respective antenna element 320, the radiated signals interact, interfere (constructively and destructively) and amplify with each other to form a resulting beam. The shape (such as the amplitude, width, and / or presence of side lobes) and direction (such as the angle of the beam with respect to the surface of the antenna array 318) of the signals with respect to one another may be dynamically controlled by varying the phase shift or offset provided by the phase shifter 314 and the amplitude provided by the amplifiers 312, 316. The controller / processor 334 may be located partially or completely within one or more other components of the architecture 300. For example, the controller / processor 334 may be located within the modem 302 in some aspects.

[0062]

[0072] As noted above, Figure 3 is provided as an example. Other examples may differ from those described with respect to Figure 3.

[0063]

[0073] FIG. 4 illustrates an example sidelink communication 400. As shown in FIG. 4, a first UE 405-1 may communicate with a second UE 405-2 (and one or more other UEs 405) via one or more sidelink channels 410. The UE 405-1 and the UE 405-2 may communicate using the one or more sidelink channels 410 for P2P communication, D2D communication, V2X communication (which may include, for example, V2V communication, V2I communication, vehicle-to-pedestrian (V2P) communication, etc.), mesh networking, etc. In some aspects, the UE 405 (e.g., the UE 405-1 and / or the UE 405-2) may correspond to one or more other UEs described elsewhere herein, such as the UE 120. In some aspects, the one or more sidelink channels 410 may use a PC5 interface and / or operate in a high frequency band (e.g., the 5.9 GHz band). Additionally or alternatively, the UE 405 may synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, symbols, etc.) using Global Navigation Satellite System (GNSS) timing.

[0064]

[0074] 4, the one or more sidelink channels 410 may include a physical sidelink control channel (PSCCH) 415, a physical sidelink shared channel (PSSCH) 420, and / or a physical sidelink feedback channel (PSFCH) 425. The PSCCH 415 may be used to communicate control information, similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communications with the base station 110 over an access link or access channel. The PSSCH 420 may be used to communicate data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communications with the base station 110 over an access link or access channel. For example, the PSCCH 415 may carry sidelink control information (SCI) 430, which may indicate various control information used for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, spatial resources, etc.) for which a transport block (TB) 435 may be carried on the PSSCH 420. The TB 435 may include data. The PSFCH 425 may be used to communicate sidelink feedback 440, such as hybrid automatic repeat request (HARQ) feedback (e.g., positive or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), scheduling request (SR), etc.

[0065]

[0075] In some aspects, one or more sidelink channels 410 may use a resource pool. For example, a scheduling assignment (e.g., included in the SCI 430) may be transmitted in a subchannel using a particular resource block (RB) over time. In some aspects, a data transmission (e.g., on the PSSCH 420) associated with a scheduling assignment may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, the scheduling assignment and associated data transmission are not transmitted on adjacent RBs.

[0066]

[0076] In some aspects, the UE 405 may operate using a transmission mode in which resource selection and / or scheduling is performed by the UE 405 (e.g., rather than by the base station 110). In some aspects, the UE 405 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, the UE 405 may measure Received Signal Strength Indicator (RSSI) parameters (e.g., Sidelink RSSI (S-RSSI) parameters) associated with various sidelink channels, measure Reference Signal Received Power (RSRP) parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, measure Reference Signal Received Quality (RSRQ) parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, etc., and may select a channel for transmission of a sidelink communication based at least in part on the measurement(s).

[0067]

[0077] Additionally or alternatively, the UE 405 may perform resource selection and / or scheduling using the SCI 430 received in the PSCCH 415, which may indicate occupied resources, channel parameters, etc. Additionally or alternatively, the UE 405 may perform resource selection and / or scheduling by determining a channel busy ratio (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 405 may use for a particular set of subframes).

[0068]

[0078] In a transmission mode in which resource selection and / or scheduling is performed by the UE 405, the UE 405 may generate sidelink grants and transmit those grants in the SCI 430. The sidelink grant may indicate one or more parameters (e.g., transmission parameters) to be used for the next sidelink transmission, such as, for example, one or more resource blocks to be used for the next sidelink transmission on the PSSCH 420 (e.g., for the TB 435), one or more subframes to be used for the next sidelink transmission, a modulation and coding scheme (MCS) to be used for the next sidelink transmission, etc. In some aspects, the UE 405 may generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as a periodicity of the sidelink transmissions. Additionally or alternatively, the UE 405 may generate a sidelink grant for event-driven scheduling, such as for on-demand sidelink messages.

[0069]

[0079] As noted above, Figure 4 is provided as an example. Other examples may differ from those described with respect to Figure 4.

[0070]

[0080] FIG. 5 illustrates an example 500 of sidelink and access link communications. As shown in FIG. 5, a transmitter (Tx) / receiver (Rx) UE 505 and an Rx / Tx UE 510 may communicate with each other via a sidelink, as described above with respect to FIG. 4. As further shown, in some sidelink modes, the base station 110 may communicate with the Tx / Rx UE 505 via a first access link. Additionally or alternatively, in some sidelink modes, the base station 110 may communicate with the Rx / Tx UE 510 via a second access link. The Tx / Rx UE 505 and / or the Rx / Tx UE 510 may correspond to one or more UEs described elsewhere herein, such as the UE 120 of FIG. 1. Thus, a direct link between the UEs 120 (e.g., via a PC5 interface) may be referred to as a sidelink, and a direct link between the base station 110 and the UE 120 (e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be transmitted over the sidelink, and access link communications may be transmitted over the access link, which may be either downlink communications (from the base station 110 to the UE 120) or uplink communications (from the UE 120 to the base station 110).

[0071]

[0081] As noted above, Figure 5 is provided as an example. Other examples may differ from those described with respect to Figure 5.

[0072]

[0082] FIG. 6 is a diagram illustrating an example beam group 600. As shown in FIG. 6, the UE 605 may communicate (e.g., transmit and / or receive) using different beams associated with different spatial directions. The beams may be associated with different shapes (such as amplitude, width, and / or presence of side lobes) and directions (such as the angle of the beam with respect to the surface of the antenna array), as described above in connection with FIG. 3. For example, as shown in FIG. 6, the UE 605 may be capable of forming a wide beam and / or a narrow beam. A wide beam may be associated with a relatively large width. In some aspects, a wide beam may be a beam associated with a low beamforming gain, among other examples. A narrow beam may be associated with a relatively narrow width. For example, a narrow beam may be a beam associated with a finely tuned beam, among other examples, and / or a high beamforming gain. The narrow beams shown in FIG. 6 have similar widths, but there may be various levels of narrow beams having different widths (eg, different levels of beam fine tuning).

[0073]

[0083] As shown in FIG. 6, the UE 605 may be capable of forming beams in different spatial directions. The UE 605 may group or associate beams having similar spatial directions (e.g., similar angles relative to the surface of the antenna array) into a beam group. A beam group may include one or more beams. In some aspects, a beam group may include one or more wide beams and / or one or more narrow beams. For example, as indicated by reference numeral 610, a first beam group (e.g., beam group 1) of the UE 605 may include three narrow beams and one wide beam, each having a similar spatial direction (e.g., east of the UE 605). As indicated by reference numeral 615, a second beam group (e.g., beam group 2) of the UE 605 may include three narrow beams and one wide beam, each having a similar spatial direction (e.g., north of the UE 605). As indicated by reference numeral 620, a third beam group (e.g., beam group 3) of the UE 605 may include three narrow beams and one wide beam, each having a similar spatial direction (e.g., west of the UE 605). As indicated by reference numeral 625, a fourth beam group (e.g., beam group 4) of the UE 605 may include three narrow beams and one wide beam, each having a similar spatial direction (e.g., south of the UE 605). The beam groups shown in FIG. 6 are provided as examples. As described above, a beam group may include one beam or multiple beams, only narrow beams, only wide beams, and / or both wide and narrow beams, among other examples.

[0074]

[0084] As noted above, Figure 6 is provided as an example. Other examples may differ from those described with respect to Figure 6.

[0075]

[0085] FIG. 7 illustrates an example sidelink communication network 700. As shown in FIG. 7, the sidelink communication network may include a UE 705. The UE 705 may be a transmitting (Tx) UE. As used herein, a "transmitting UE" or a "Tx UE" may refer to a UE that transmits sidelink communications in the context of the described examples. Similarly, as used herein, a "receiving UE" or an "Rx UE" may refer to a UE that receives sidelink communications in the context of the described examples. For example, in other scenarios, a "Tx UE" may receive communications in a manner similar to an Rx UE as described herein. Similarly, an "Rx UE" may transmit communications in a manner similar to a Tx UE as described herein.

[0076]

[0086] As shown in FIG. 7, the sidelink communications network may include a first portion denoted by reference numeral 710 and a second portion denoted by reference numeral 715. The first portion may include UE 720, UE 725, UE 730, UE 735, and UE 740. The second portion may include UE 745. UE 705 may be capable of transmitting sidelink communications using a first beam (e.g., B1) to UE 730 in the first portion of the sidelink communications network as denoted by reference numeral 755. Additionally or alternatively, UE 705 may be capable of transmitting sidelink communications using a second beam (e.g., B2) to UE 745 in the second portion of the sidelink communications network as denoted by reference numeral 750.

[0077]

[0087] In general, if a channel used for sidelink communication is busy, the sidelink communication may cause interference with or collide with another transmission on the channel. Thus, when a Tx UE (e.g., UE 705) needs to transmit a sidelink communication to an Rx UE (e.g., UE 730 and / or UE 745), the Tx UE should take into account how busy the channel is when deciding when / if to transmit the sidelink communication on the sidelink channel. To achieve this, the Tx UE may be configured to monitor a CBR associated with the sidelink channel. The CBR is a measurement that indicates how busy the channel is and thus may indicate the probability of interference or collision with another transmission on the channel. For example, the CBR may be approximately equal to the number of resources that the UE detects being used on the channel divided by the total number of resources available on the channel. A relatively high CBR may indicate that the channel is used frequently for transmission, meaning that the probability of interference or collision is relatively high. A relatively low CBR may indicate that the channel is not heavily used, meaning that the likelihood of interference or collisions is relatively low.

[0078]

[0088] The CBR may be defined or otherwise fixed by a wireless communication standard, such as a 3GPP® specification. However, in prior wireless communication systems in which CBR-based techniques have been implemented, such as Long Term Evolution (LTE®) V2X systems, the CBR is defined but does not address the concept of beamforming. Thus, in systems that use beamforming (e.g., NR systems that use millimeter wave (mmW) communications), traditional approaches that use the CBR may be insufficient to assess channel use.

[0079]

[0089] For example, as described above, the UE 705 may be capable of transmitting to a first portion of a sidelink communication network or a second portion of a wireless communication network. As shown in FIG. 7, the first portion of the sidelink communication network may be congested and include multiple UEs transmitting on a channel. For example, the UE 720 may be transmitting a sidelink communication to the UE 735, as shown at reference numeral 760. Similarly, the UE 725 may be transmitting a sidelink communication to the UE 740, as shown at reference numeral 765. Thus, the first portion of the sidelink communication network may be relatively busy and may have a relatively high probability of interference or collision. Conversely, the second portion of the sidelink communication network may only include the UE 745 and may not have any other UEs transmitting on the sidelink channel. Thus, the second portion of the sidelink communication network may have a relatively low probability of interference or collision.

[0080]

[0090] However, as described above, the UE 705 may not be able to determine different CBRs for the first beam (e.g., B1 transmitting to a first part of the sidelink communications network) and the second beam (e.g., B2 transmitting to a second part of the sidelink communications network) to distinguish between a busy part of the sidelink communications network (e.g., a first part of the sidelink communications network) and an idle part of the sidelink communications network (e.g., a second part of the sidelink communications network). As a result, the communication performance of the UE 705 may be deteriorated because the UE 705 may use transmission parameters that cause interference or collision with other communications (e.g., in the busy part of the sidelink communications network) or are not optimized (e.g., for the idle part of the sidelink communications network).

[0081]

[0091] Some techniques and apparatuses described herein enable beamformed CBR. For example, a Tx UE may measure a first CBR (e.g., Tx CBR) using a beam used to transmit sidelink communication. A Rx UE may measure a second CBR (e.g., Rx CBR) using a beam used to receive sidelink communication. The Rx UE may send an indication of the Rx CBR to the Tx UE. The Tx UE may use the Tx CBR and / or the Rx CBR to determine one or more transmission parameters for the sidelink communication. The transmission parameters may include, among other examples, a number of HARQ retransmissions for the sidelink communication, a number of subchannels used by the Tx UE in a slot, a modulation and coding scheme (MCS) used for the sidelink communication, and / or a channel occupancy ratio (CR) limit for the Tx UE. The Tx UE may transmit a sidelink communication to the Rx UE using the determined one or more transmission parameters.

[0082]

[0092] In some aspects, the Tx UE may use one or more beams included in the first beam group to measure the Tx CBR for the first beam group. The first beam group may include beams used to transmit sidelink communications. Since the beams included in a beam group have similar spatial directions (e.g., as described above in connection with FIG. 6), the beam group should have the same CBR for each beam included in the beam group. Thus, the Tx UE may measure the Tx CBR for the beam group including the beams used to transmit sidelink communications. Similarly, the Rx UE may measure the Rx CBR for the beam group including the beams used to receive sidelink communications.

[0083]

[0093] As a result, the Tx UE may be enabled to use a beamforming CBR, which may be used to determine transmission parameters for sidelink communications. This may enable the Tx UE to identify when the Tx UE is transmitting into a busy portion of the network (e.g., with a relatively high CBR) and use transmission parameters that reduce the likelihood or probability of interference or collision with other transmissions. Similarly, the Tx UE may be enabled to identify when the Tx UE is transmitting into an idle portion of the network (e.g., with a relatively low CBR) and use transmission parameters that enhance communication performance for the sidelink communications.

[0084]

[0094] 8A-8C are diagrams illustrating an example 800 associated with beamforming CBR, according to various aspects of the present disclosure. As shown in FIG. 8A-8C, the example 800 includes communication between one or more UEs. In some aspects, the UEs may be included in a wireless network, such as wireless network 100, or a sidelink communication network as described above in connection with FIG. 7. The UEs may communicate via a wireless sidelink, as described above in connection with FIG. 4 and / or FIG. 5.

[0085]

[0095] As shown in FIG. 8A, the Tx UE 805 may be able to transmit sidelink communications (e.g., signals) using a first beam (e.g., B1 as shown in FIG. 8A). The Tx UE 805 may measure a CBR for the first beam and / or for a beam group that includes the first beam to avoid causing collisions or interference at nearby UEs, such as at UE 815 as shown in FIG. 8A. For example, the Tx UE may measure channel usage using the first beam to determine a level of channel usage (e.g., CBR) in a spatial direction associated with the first beam.

[0086]

[0096] For example, as indicated by reference numeral 820, the UE 810 may be transmitting a sidelink communication to the UE 815. The sidelink communication transmitted by the UE 810 may be received by the UE 815. The sidelink communication may be a PSCCH signal (e.g., carrying SCI and / or resource reservation information) or may be a PSSCH signal. The UE 815 may receive and / or decode the sidelink communication transmitted by the UE 810.

[0087]

[0097] As indicated by reference numeral 825, the UE 815 may send a feedback communication (e.g., ACK / NACK feedback) to the UE 810 based on receiving the sidelink communication on the PSFCH. The feedback communication may include one or more fields (e.g., one or more bits) indicating the number of resources (e.g., number of subchannels) used by the sidelink communication. For example, one or more fields may be added to the feedback communication (e.g., in addition to the ACK / NACK feedback) to indicate the feedback and the number of resources (e.g., number of subchannels) used by the sidelink communication. Additionally or alternatively, the UE 815 may transmit or broadcast an announcement message (e.g., a receive (Rx) announcement) indicating the reservation of resources for one or more upcoming sidelink communications. For example, a sidelink communication from the UE 810 may carry an SCI reserving resources (e.g., one or more subchannels) for the upcoming sidelink communication. The UE 815 may transmit the announcement message indicating the number of resources (e.g., number of subchannels) for the upcoming sidelink communication.

[0088]

[0098] As indicated by reference numeral 830, the Tx UE 805 may receive a feedback communication and / or an announcement message from the UE 815 using the first beam (and / or one or more other beams included in the beam group including the first beam). For example, as shown in FIG. 8A, the feedback communication and / or announcement message may be transmitted to the UE 810 in a spatial direction such that the Tx UE 805 is enabled to receive the feedback communication and / or announcement message using the first beam. This enables the Tx UE 805 to identify channel usage in the spatial direction of the first beam, as described in more detail below.

[0089]

[0099] As indicated by reference numeral 835, the Tx UE 805 may measure a first CBR (e.g., Tx CBR) for the first beam and / or for a beam group (e.g., first beam group) that includes the first beam. For example, the Tx UE 805 may identify a number of resources (e.g., number of subchannels) used or reserved by the UE 815 based at least in part on the feedback communication and / or the announce message. The Tx UE 805 may measure the first CBR over a measurement window. For example, the Tx UE 805 may monitor for feedback communication and / or announce messages using the first beam and / or using beams included in the first beam group. The Tx UE 805 may determine the number of resources (e.g., number of subchannels) on which there was sidelink communication (e.g., PSSCH transmission) as calculated by the Tx UE 805 based at least in part on feedback communication and / or announcement messages received by the Tx UE 805 on the first beam or on beams included in the first beam group over the measurement window. The Tx UE 805 may determine the first CBR based at least in part on the number of resources (e.g., number of subchannels) identified during the measurement window.

[0090]

[0100] As a result, the Tx UE 805 is enabled to determine channel usage for nearby Rx UEs, such as UE 815. For example, if the Tx UE 805 determines a relatively high CBR for the first CBR, the first CBR may indicate a busy channel (e.g., a large number of UEs near the Tx UE 805 (in the spatial direction of the first beam) are receiving the communication). If the Tx UE 805 determines a relatively low CBR for the first CBR, the first CBR may indicate an idle channel (e.g., a small number of UEs near the Tx UE 805 (in the spatial direction of the first beam) are receiving the communication).

[0091]

[0101] 8B, the Rx UE 840 may be an intended receiver of sidelink communications from the Tx UE 805 (e.g., transmitted using a first beam, as described above). For example, the Rx UE 840 may intend to receive sidelink communications from the Tx UE 805 using a second beam (e.g., B2 as shown in FIG. 8B). The second beam may be included in the beam group (e.g., the second beam group) of the Rx UE 840.

[0092]

[0102] The Rx UE 805 may be configured to monitor channel usage in the spatial direction of the second beam and / or the second beam group. For example, one or more UEs, such as the UE 845 as shown in FIG. 8B, may be transmitting in the spatial direction of the second beam and / or the second beam group. For example, as shown by reference numeral 850, the UE 845 may be transmitting sidelink communication in the spatial direction of the second beam and / or the second beam group. The sidelink communication may be a PSCCH signal (e.g., carrying an SCI) or a PSSCH signal. The sidelink communication may be intended for another Rx UE (not shown in FIG. 8B).

[0093]

[0103] As indicated by reference numeral 855, the Rx UE 840 may receive, detect, and / or measure sidelink communication using the second beam and / or another beam included in the second beam group of the Rx UE 840. For example, the Rx UE 840 may measure the RSSI (e.g., sidelink RSSI (SL-RSSI)) of the sidelink communication using the second beam and / or another beam included in the second beam group. The SL-RSSI may be defined by a wireless communication standard, such as the 3GPP specifications. For example, the SL-RSSI may be a linear average of the total received power observed in the configured subchannels in the OFDM symbols of the slot configured for the PSCCH and PSSCH (e.g., starting from the second OFDM symbol of the slot).

[0094]

[0104] As indicated by reference numeral 860, the Rx UE 840 may measure a second CBR (e.g., Rx CBR) for the second beam and / or for the second beam group. For example, the Rx UE 840 may monitor for sidelink communications using the second beam and / or the second beam group to measure the SL-RSSI of the sidelink communications (e.g., in a manner similar to that described above). The Rx UE 840 may measure the second CBR based at least in part on a number of subchannels associated with SL-RSSI values ​​that satisfy a threshold over a measurement window. The Rx UE 840 may measure the second CBR for the second beam (e.g., using the measured SL-RSSI on the second beam) and / or for the second beam group (e.g., using the measured SL-RSSI on any beams included in the second beam group).

[0095]

[0105] As a result, the Rx UE 840 may be enabled to determine channel usage in the receive direction (e.g., in the spatial direction of the second beam). For example, if the Rx UE 840 determines a relatively high CBR for the second CBR, the second CBR may indicate that the channel is busy in the receive direction (e.g., there are many UEs transmitting in the spatial direction of the second beam). If the Rx UE 840 determines a relatively low CBR for the second CBR, the second CBR may indicate that the channel is idle in the receive direction (e.g., there are few UEs transmitting in the spatial direction of the second beam).

[0096]

[0106] The Rx UE 840 may transmit, and the Tx UE 805 may receive, an indication of a second CBR (e.g., Rx CBR) for the second beam and / or for the second beam group, as indicated by reference numeral 865. By transmitting the indication of the second CBR, the Tx UE 805 is enabled to identify the channel usage (e.g., the second CBR) detected at the Rx UE 840 and determine transmission parameters for sidelink communication to the Rx UE 840 based at least in part on the channel usage at the Rx UE 840, as described in more detail below.

[0097]

[0107] 8C , as indicated by reference numeral 870, the Tx UE 805 may determine one or more transmission parameters for sidelink communications to the Rx UE 840 based at least in part on the first CBR and / or the second CBR. The transmission parameters may include, among other examples, a number of HARQ retransmissions for sidelink communications, a number of subchannels used by the Tx UE 805 (e.g., within a slot), an MCS used for sidelink communications, and / or a CR limit (e.g., for the Tx UE 805 or the Rx UE 840).

[0098]

[0108] The Tx UE 805 may use only the first CBR, only the second CBR, and / or both the first CBR and the second CBR to determine one or more transmission parameters. For example, in some aspects, the Tx UE 805 may determine a maximum CBR (e.g., the CBR having a higher value) of the first CBR and the second CBR. The Tx UE 805 may use the maximum CBR to determine one or more transmission parameters, such as a number of HARQ retransmissions for sidelink communication, a number of subchannels used by the Tx UE 805 (e.g., within a slot), and / or an MCS used for sidelink communication. In some aspects, the Tx UE 805 may use the first CBR to determine the first transmission parameter (e.g., the first one or more transmission parameters) and the second CBR to determine the second transmission parameter (e.g., the second one or more transmission parameters). For example, the Tx UE 805 may use a first CBR (e.g., Tx CBR) to determine a CR limit for the Tx UE 805 and may use a second CBR (e.g., Rx CBR) to determine a CR limit for the Rx UE 840.

[0099]

[0109] As indicated by reference numeral 875, the Tx UE 805 may transmit sidelink communication to the Rx UE 840 using one or more transmission parameters (e.g., determined by the Tx UE 805 as described above). The Tx UE 805 may transmit the sidelink communication using a first beam (e.g., B1). The Rx UE 840 may receive the sidelink communication using a second beam (e.g., B2). As a result, the Tx UE 805 may ensure that the sidelink communication has a low probability or likelihood of causing collisions and / or interference by using fewer HARQ retransmissions, fewer subchannels, a lower order MCS, and / or a lower CR limit, among other examples (e.g., when the first CBR and / or the second CBR are relatively high CBRs indicating a busy channel). Similarly, the Tx UE 805 may improve communication performance of the sidelink communication by using a larger number of HARQ retransmissions, a larger number of subchannels, a higher order MCS, and / or a higher CR limit, among other examples (e.g., when the first CBR and / or the second CBR are relatively low CBRs indicating an idle channel).

[0100]

[0110] Additionally, by using beamforming CBR as described above, the Tx UE 805 may be enabled to identify when the Tx UE 805 is transmitting in a busy portion of the network (e.g., having a relatively high CBR) and to use transmission parameters that reduce the likelihood or probability of interference or collision with other transmissions. Similarly, the Tx UE 805 may be enabled to identify when the Tx UE 805 is transmitting in an idle portion of the network (e.g., having a relatively low CBR) and to use transmission parameters that enhance communication performance for the sidelink communication.

[0101]

[0111] As noted above, Figures 8A-8C are provided as examples, and other examples may differ from those described with respect to Figures 8A-8C.

[0102]

[0112] 9 is a diagram illustrating examples 900 and 905 associated with beamforming CBR, according to various aspects of the disclosure. As shown in FIG. 9, examples 900 and 905 include communication between one or more UEs. In some aspects, the UEs may be included in a wireless network, such as wireless network 100, or a sidelink communication network as described above in connection with FIG. 7. The UEs may communicate via a wireless sidelink, as described above in connection with FIG. 4 and / or FIG. 5.

[0103]

[0113] Example 900 and example 905 show examples where a Tx UE, such as Tx UE 910, uses beamforming CBR to determine transmission parameters in a similar (or the same) manner as described above in connection with Figures 8A-8C. The example shown in Figure 9 shows a scenario where relying solely on Tx CBR or Rx CBR may be insufficient.

[0104]

[0114] As shown in FIG. 9 and example 900, Tx UE 910 may intend to transmit a sidelink communication (e.g., using a first beam, B1) to Rx UE 915. Rx UE 915 may intend to receive the sidelink communication using a second beam (e.g., B2). As shown in FIG. 9, UE 920 and UE 925 may be communicating in the vicinity of Rx UE 915. For example, UE 920 may transmit a sidelink communication to UE 925, as indicated by reference numeral 930. UE 925 may receive the sidelink communication.

[0105]

[0115] As indicated by reference numeral 935, the UE 925 may send to the UE 920 a feedback communication and / or an announcement message indicating the number of resources (e.g., the number of subchannels) to be used by the UE 925 to receive the sidelink communication (or an upcoming sidelink communication), as described above in connection with Figures 8A-8C. However, as indicated by reference numeral 940, the Tx UE 910 may be out of communication range of the UE 925. Thus, the Tx UE 910 may not receive the feedback communication and / or the announcement message sent by the UE 925.

[0106]

[0116] As a result, when measuring the Tx CBR for the first beam (or a beam group that includes the first beam), the Tx UE 910 may not take into account the subchannels used by the UE 920 and / or the UE 925 for sidelink communications, as indicated by reference numeral 930. Thus, if the Tx UE 910 relies solely on the Tx CBR to determine transmission parameters for sidelink communications to the Rx UE 915, the Tx UE 910 may cause interference and / or collisions at the Rx UE 915 by failing to take into account the subchannels used by the UE 920 and / or the UE 925 for sidelink communications (as indicated by reference numeral 930).

[0107]

[0117] However, as indicated by reference numeral 945, the Rx UE 915 may measure the Rx CBR for the second beam (or a beam group including the second beam) by measuring an RSSI (e.g., SL-RSSI) of sidelink communication, indicated by reference numeral 930, using the second beam (or another beam in a beam group including the second beam), as described above in connection with FIGs. 8A-8C. The Rx UE 915 may send an indication of the measured Rx CBR for the second beam to the Tx UE 910. As a result, the Tx UE 910 may take into account the subchannels used by the UEs 920 and / or 925 for sidelink communication, indicated by reference numeral 930, when determining transmission parameters for the sidelink communication to the Rx UE 915. This may reduce the likelihood or probability that sidelink communications to Rx UE 915 will cause interference and / or collisions (e.g., that would occur if Tx UE 910 relied solely on Tx CBR).

[0108]

[0118] As shown in FIG. 9 and example 905, Tx UE 910 may intend to transmit a sidelink communication (e.g., using a first beam, B1) to Rx UE 915. Rx UE 915 may intend to receive the sidelink communication using a second beam (e.g., B2). As shown in FIG. 9, UE 920 and UE 925 may be communicating near Tx UE 910. For example, UE 920 may transmit a sidelink communication to UE 925, as indicated by reference numeral 950. UE 925 may receive the sidelink communication.

[0109]

[0119] As indicated by reference numeral 955, the UE 925 may send a feedback communication and / or an announce message to the UE 920 indicating the number of resources (e.g., the number of subchannels) to be used by the UE 925 to receive the sidelink communication (or an upcoming sidelink communication), as described above in connection with Figures 8A-8C. The Tx UE 910 may receive the feedback communication and / or the announce message using the first beam (or another beam included in the beam group including the first beam) to measure the Tx CBR, as described above in connection with Figures 8A-8C.

[0110]

[0120] As indicated by reference numeral 960, the Rx UE 915 may be out of communication range of the UE 920. As a result, the Rx UE 915 may not measure the sidelink communication (indicated by reference numeral 950) when measuring the Rx CBR of the second beam (and / or the beam group including the second beam). As a result, as indicated by reference numeral 965, the Rx UE 915 may report a low (e.g., approximately zero or close to zero) Rx CBR for the second beam (and / or the beam group including the second beam) because the Rx UE 915 cannot measure the sidelink communication (indicated by reference numeral 950) transmitted by the UE 920.

[0111]

[0121] Thus, if the Tx UE 910 relies only on the Rx CBR reported by the Rx UE 915 to determine transmission parameters for sidelink communication to the Rx UE 915, the Tx UE 910 may cause interference and / or collisions at the UE 925 by failing to take into account the subchannels used by the UE 920 and / or the UE 925 for sidelink communication (denoted by reference numeral 930). However, as described above, the Tx UE 910 may be enabled to rely on the Tx CBR to take into account the subchannels used by the UE 920 and / or the UE 925 for sidelink communication (denoted by reference numeral 930). Thus, the transmission parameters for sidelink communication to the Rx UE 915 (e.g., as described above in connection with FIGS. 8A-8C) may take into account the subchannels used by the UE 920 and / or the UE 925 for sidelink communication (denoted by reference numeral 930). As a result, the likelihood or probability that sidelink communications to Rx UE 915 will cause interference and / or collisions (e.g., that would occur if Tx UE 910 relied solely on Rx CBR) may be reduced.

[0112]

[0122] As noted above, Figure 9 is provided as an example. Other examples may differ from those described with respect to Figure 9.

[0113]

[0123] 10 is a diagram illustrating an example 1000 associated with beamforming CBR, according to various aspects of the disclosure. As shown in FIG. 10, the example 1000 includes communication between one or more UEs. In some aspects, the UEs may be included in a wireless network, such as the wireless network 100, or a sidelink communication network as described above in connection with FIG. 7. The UEs may communicate via a wireless sidelink, as described above in connection with FIG. 4 and / or FIG. 5.

[0114]

[0124] 10, the Tx UE 1005 may communicate with the Rx UE 1010 and the Rx UE 1015 using a first beam (e.g., B1) and / or a first beam group including the first beam. The Rx UE 1010 may receive sidelink communications from the Tx UE 1005 using a second beam (e.g., B2) and / or a second beam group including the second beam. The Rx UE 1015 may receive sidelink communications from the Tx UE 1005 using a third beam (e.g., B3) and / or a third beam group including the third beam.

[0115]

[0125] As indicated by reference numeral 1020, the Tx UE 1005 may measure a first CBR (e.g., Tx CBR) for the first beam and / or first beam group. The Tx UE 1005 may measure the first CBR in a similar (or the same) manner as described above in connection with FIGS. 8A-8C and / or 9. As indicated by reference numeral 1025, the Rx UE 1010 may send an indication of a second CBR (e.g., Rx CBR) for the second beam and / or second beam group to the Tx UE 1005. For example, the Rx UE 1010 may measure the second CBR in a similar (or the same) manner as described above in connection with FIGS. 8A-8C and / or 9. As indicated by reference numeral 1030, the Rx UE 1015 may send an indication of a third CBR (e.g., an Rx CBR) for the third beam and / or third beam group to the Tx UE 1005. For example, the Rx UE 1015 may measure the third CBR in a similar (or the same) manner as described above in connection with Figures 8A-8C and / or 9.

[0116]

[0126] As indicated by reference numeral 1035, the Tx UE 1005 may determine a first set of one or more transmission parameters for sidelink communications to the Rx UE 1010 based at least in part on the first CBR (e.g., the Tx CBR) and / or the second CBR (e.g., the Rx CBR reported by the Rx UE 1010). For example, the Tx UE 1005 may determine the first set of one or more transmission parameters for sidelink communications to the Rx UE 1010 in a similar (or the same) manner as described above in connection with Figures 8A-8C and / or 9.

[0117]

[0127] As indicated by reference numeral 1040, the Tx UE 1005 may determine a second set of one or more transmission parameters for sidelink communications to the Rx UE 1015 based at least in part on the first CBR (e.g., Tx CBR) and / or the second CBR (e.g., Rx CBR reported by the Rx UE 1015). For example, the Tx UE 1005 may determine the second set of one or more transmission parameters for sidelink communications to the Rx UE 1015 in a similar (or the same) manner as described above in connection with Figures 8A-8C and / or 9.

[0118]

[0128] As indicated by reference numeral 1045, the Tx UE 1005 may transmit sidelink communication using a first set of one or more transmission parameters to the Rx UE 1010. As a result, the sidelink communication to the Rx UE 1010 may take into account a Tx CBR measured at the Tx UE 1005 (e.g., a Tx CBR of the first beam and / or first beam group) and an Rx CBR measured at the Rx UE 1010 (e.g., an Rx CBR of the second beam and / or second beam group).

[0119]

[0129] As indicated by reference numeral 1050, the Tx UE 1005 may transmit a sidelink communication using a second set of one or more transmission parameters to the Rx UE 1015. As a result, the sidelink communication to the Rx UE 1015 may take into account the Tx CBR measured at the Tx UE 1005 (e.g., the Tx CBR of the first beam and / or first beam group) and the Rx CBR measured at the Rx UE 1015 (e.g., the Rx CBR of the third beam and / or third beam group). Thus, the Tx UE 1005 may be enabled to distinguish between the channel usage detected at the Rx UE 1010 and the channel usage detected at the Rx UE 1015 while also taking into account the channel usage detected at the Tx UE 1005. This may improve communication performance of sidelink communications to Rx UE 1010 (indicated by reference numeral 1045) and / or sidelink communications to Rx UE 1015 (indicated by reference numeral 1050).

[0120]

[0130] 11 illustrates an example process 1100, performed, for example, by a UE, in accordance with various aspects of the present disclosure. The example process 1100 is an example in which a UE (e.g., UE 120, Tx UE 805, Tx UE 910, and / or Tx UE 1005) performs operations associated with beamforming CBR.

[0121]

[0131] 11, in some aspects, process 1100 may include measuring a first CBR for a first beam group of a set of beam groups associated with the UE (block 1110). For example, the UE may measure (e.g., using the CBR measurement component 1208 shown in FIG. 12) a first CBR for the first beam group of a set of beam groups associated with the UE as described above.

[0122]

[0132] 11, in some aspects, the process 1100 may include receiving, from the second UE, an indication of a second CBR for the second beam group associated with the second UE (block 1120). For example, the UE may receive (e.g., using the receiving component 1202 shown in FIG. 12) from the second UE an indication of a second CBR for the second beam group associated with the second UE, as described above.

[0123]

[0133] 11, in some aspects, the process 1100 may include transmitting a signal to the second UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR (block 1130). For example, the UE may transmit a signal to the second UE using a beam included in the first beam group (e.g., using the transmitting component 1204 shown in FIG. 12) using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR, as described above.

[0124]

[0134] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects, described below and / or in conjunction with one or more other processes described elsewhere herein.

[0125]

[0135] In a first aspect, measuring a first CBR for the first beam group includes receiving an indication from the second UE or one or more other UEs of a number of resources used or utilized to receive a signal by the second UE or one or more other UEs using a beam included in the first beam group or another beam, and determining a first CBR for the first beam group based at least in part on the number of resources used or utilized to receive the signal by the second UE or one or more other UEs.

[0126]

[0136] In a second aspect, alone or in combination with the first aspect, receiving an indication of the number of resources used or to be used for receiving a signal by the second UE or one or more other UEs includes receiving the indication via at least one of an announce message or a physical sidelink feedback channel signal.

[0127]

[0137] In a third aspect, alone or in combination with one or more of the first and second aspects, the second CBR is based at least in part on measurements of a physical sidelink shared channel signal or a physical sidelink control channel signal performed by the second UE using one or more beams included in the second beam group.

[0128]

[0138] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the second beam group includes a receive beam used by the second UE to receive a signal from the UE.

[0129]

[0139] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the process 1100 includes determining one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0130]

[0140] In a sixth aspect, alone or in combination with the fifth aspect, determining one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR includes determining a highest CBR among the first CBR and the second CBR, and determining one or more transmission parameters based at least in part on the highest CBR.

[0131]

[0141] In a seventh aspect, alone or in combination with the fifth aspect, determining one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR includes determining a first transmission parameter included in the one or more transmission parameters based at least in part on the first CBR, and determining a second transmission parameter included in the one or more transmission parameters based at least in part on the second CBR.

[0132]

[0142] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, process 1100 includes receiving an indication of a third CBR for a third beam group associated with the third UE from a third UE, and transmitting a different signal to the third UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the third CBR.

[0133]

[0143] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the one or more transmission parameters include at least one of a number of hybrid automatic repeat request retransmissions, a number of subchannels used by the UE in a slot, a modulation and coding scheme, or a channel occupancy ratio limit.

[0134]

[0144] 11 illustrates example blocks of process 1100, in some aspects process 1100 may include additional, fewer, different, or differently configured blocks than those illustrated in FIG 11. Additionally or alternatively, two or more of the blocks of process 1100 may be performed in parallel.

[0135]

[0145] FIG. 12 is a block diagram of an example apparatus 1200 for wireless communication. The apparatus 1200 may be a UE (e.g., a Tx UE as described herein) or the UE may include the apparatus 1200. In some aspects, the apparatus 1200 includes a receiving component 1202 and a transmitting component 1204 that may be in communication with one another (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 1200 may communicate with another apparatus 1206 (such as a UE, a base station, or another wireless communication device) using the receiving component 1202 and the transmitting component 1204. As further shown, the apparatus 1200 may include one or more of a CBR measurement component 1208, or a determining component 1210, among other examples.

[0136]

[0146] In some aspects, the apparatus 1200 may be configured to perform one or more operations described herein with respect to FIG. 8A, FIG. 8B, FIG. 8C, FIG. 9, and / or FIG. 10. Additionally or alternatively, the apparatus 1200 may be configured to perform one or more processes described herein, such as the process 1100 of FIG. 11, or a combination thereof. In some aspects, the apparatus 1200 and / or one or more components illustrated in FIG. 12 may include one or more components of a UE described above in connection with FIG. 2. Additionally or alternatively, one or more components illustrated in FIG. 12 may be implemented within one or more components described above in connection with FIG. 2. Additionally or alternatively, one or more components of the set of components may be implemented, at least in part, as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0137]

[0147] The receiving component 1202 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the device 1206. The receiving component 1202 may provide the received communications to one or more other components of the device 1200. In some aspects, the receiving component 1202 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) and provide the processed signals to one or more other components of the device 1206. In some aspects, the receiving component 1202 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or a combination thereof, of a UE as described above with respect to FIG. 2.

[0138]

[0148] The transmitting component 1204 may transmit a communication to the device 1206, such as a reference signal, control information, a data communication, or a combination thereof. In some aspects, one or more other components 1206 may generate a communication and provide the generated communication to the transmitting component 1204 for transmission to the device 1206. In some aspects, the transmitting component 1204 may perform signal processing on the generated communication (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) and transmit the processed signal to the device 1206. In some aspects, the transmitting component 1204 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof, of a UE as described above with respect to FIG. 2. In some aspects, the transmitting component 1204 may be co-located with the receiving component 1202 in a transceiver.

[0139]

[0149] The CBR measurement component 1208 may measure a first CBR for the first beam group for a first beam group of the set of beam groups associated with the UE. The receiving component 1202 may receive an indication of a second CBR for a second beam group associated with the second UE from the second UE. The transmitting component 1204 may transmit a signal to the second UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0140]

[0150] The receiving component 1202 may receive an indication from the second UE or one or more other UEs of the number of resources used or utilized to receive signals by the second UE or one or more other UEs using beams included in the first beam group or another beam. The CBR measurement component 1208 may determine a first CBR for the first beam group based at least in part on the number of resources used or utilized to receive signals by the second UE or one or more other UEs. The receiving component 1202 may receive the indication via at least one of an announce message or a physical sidelink feedback channel signal.

[0141]

[0151] The determining component 1210 may determine one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR. The determining component 1210 may determine a highest CBR among the first CBR and the second CBR. The determining component 1210 may determine one or more transmission parameters based at least in part on the highest CBR. The determining component 1210 may determine a first transmission parameter included in the one or more transmission parameters based at least in part on the first CBR. The determining component 1210 may determine a second transmission parameter included in the one or more transmission parameters based at least in part on the second CBR.

[0142]

[0152] The receiving component 1202 may receive from the third UE an indication of a third CBR for a third beam group associated with the third UE. The transmitting component 1204 may transmit a different signal to the third UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the third CBR.

[0143]

[0153] The number and arrangement of components shown in Figure 12 are provided as an example. In practice, there may be additional, fewer, different, or differently configured components than those shown in Figure 12. Furthermore, two or more components shown in Figure 12 may be implemented within a single component, or a single component shown in Figure 12 may be implemented as multiple distributed components. Additionally or alternatively, a set of components (or components) shown in Figure 12 may perform one or more functions described as being performed by another set of components shown in Figure 12.

[0144]

[0154] FIG. 13 is a block diagram of an example apparatus 1300 for wireless communication. The apparatus 1300 may be a UE (e.g., an Rx UE as described herein), or the UE may include the apparatus 1300. In some aspects, the apparatus 1300 includes a receiving component 1302 and a transmitting component 1304, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 1300 may communicate with another apparatus 1306 (such as a UE, a base station, or another wireless communication device) using the receiving component 1302 and the transmitting component 1304. As further shown, the apparatus 1300 may include a CBR measurement component 1308, among other examples.

[0145]

[0155] In some aspects, the apparatus 1300 may be configured to perform one or more operations described herein in conjunction with FIG. 8A, FIG. 8B, FIG. 8C, FIG. 9, and / or FIG. 10. Additionally or alternatively, the apparatus 1300 may be configured to perform one or more processes described herein, or a combination thereof. In some aspects, the apparatus 1300 and / or one or more components illustrated in FIG. 13 may include one or more components of a UE described above in conjunction with FIG. 2. Additionally or alternatively, one or more components illustrated in FIG. 13 may be implemented within one or more components described above in conjunction with FIG. 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0146]

[0156] The receiving component 1302 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the apparatus 1306. The receiving component 1302 may provide the received communications to one or more other components of the apparatus 1300. In some aspects, the receiving component 1302 may perform signal processing on the received communications (such as filtering, amplifying, demodulating, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) and provide the processed signals to one or more other components of the apparatus 1306. In some aspects, the receiving component 1302 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or combinations thereof of a UE, as described above in connection with FIG. 2.

[0147]

[0157] The transmitting component 1304 may transmit a communication, such as a reference signal, control information, a data communication, or a combination thereof, to the device 1306. In some aspects, one or more other components of the device 1306 may generate a communication and provide the generated communication to the transmitting component 1304 for transmission to the device 1306. In some aspects, the transmitting component 1304 may perform signal processing (such as filtering, amplifying, modulating, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communication and transmit the processed signal to the device 1306. In some aspects, the transmitting component 1304 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof, of the UE, as described above in connection with FIG. 2. In some aspects, the transmitting component 1304 may be co-located with the receiving component 1302 within the transceiver.

[0148]

[0158] The CBR measurement component 1308 may measure a first CBR for the first beam group for a first beam group of the set of beam groups associated with the UE. The transmitting component 1304 may transmit an indication of the first CBR for the first beam group to the second UE. The receiving component 1302 may receive a signal from the second UE using a beam included in the second beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR for the second beam group.

[0149]

[0159] The number and arrangement of components shown in Figure 13 are provided as an example. In practice, there may be additional, fewer, different, or differently configured components than those shown in Figure 13. Furthermore, two or more of the components shown in Figure 13 may be implemented within a single component, or a single component shown in Figure 13 may be implemented as multiple distributed components. Additionally or alternatively, a set of components (or components) shown in Figure 13 may perform one or more functions described as being performed by another set of components shown in Figure 13.

[0150]

[0160] The following provides a summary of several aspects of the disclosure.

[0151]

[0161] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: measuring, for a first beam group of a set of beam groups associated with the UE, a first channel busy ratio (CBR) for the first beam group; receiving from a second UE an indication of a second CBR for a second beam group associated with the second UE; and transmitting a signal to the second UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0152]

[0162] Aspect 2: The method of aspect 1, wherein measuring the first CBR for the first beam group comprises receiving an indication from the second UE or one or more other UEs of a number of resources used or utilized to receive a signal by the second UE or one or more other UEs using a beam included in the first beam group or another beam, and determining the first CBR for the first beam group based at least in part on the number of resources used or utilized to receive the signal by the second UE or one or more other UEs.

[0153]

[0163] Aspect 3: The method of aspect 2, wherein receiving an indication of the number of resources used or to be used for receiving the signal by the second UE or one or more other UEs comprises receiving the indication via at least one of an announce message or a physical sidelink feedback channel signal.

[0154]

[0164] Aspect 4: The method of any of aspects 1-3, wherein the second CBR is based at least in part on measurements of a physical sidelink shared channel signal or a physical sidelink control channel signal performed by the second UE using one or more beams included in the second beam group.

[0155]

[0165] Example 5: The method of any of Examples 1-4, wherein the second beam group includes a receive beam used by the second UE to receive a signal from the UE.

[0156]

[0166] Example 6: The method of any of Examples 1-5, further comprising determining one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

[0157]

[0167] Aspect 7: The method of aspect 6, wherein determining one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR comprises determining a highest CBR among the first CBR and the second CBR, and determining one or more transmission parameters based at least in part on the highest CBR.

[0158]

[0168] Aspect 8: The method of aspect 6, wherein determining one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR comprises determining a first transmission parameter included in the one or more transmission parameters based at least in part on the first CBR, and determining a second transmission parameter included in the one or more transmission parameters based at least in part on the second CBR.

[0159]

[0169] Aspect 9: The method of any of aspects 1-8, further comprising: receiving from a third UE an indication of a third CBR for a third beam group associated with the third UE; and transmitting a different signal to the third UE using a beam included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the third CBR.

[0160]

[0170] Aspect 10: The method of any of aspects 1-9, wherein the one or more transmission parameters include at least one of a number of hybrid automatic repeat request retransmissions, a number of subchannels used by the UE in the slot, a modulation and coding scheme, or a channel occupancy limit.

[0161]

[0171] Aspect 11: An apparatus for wireless communication in a device, comprising a processor, a memory coupled to the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of one or more of aspects 1 to 10.

[0162]

[0172] Aspect 12: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory, wherein the memory and the one or more processors are configured to execute a method of one or more of aspects 1 to 10.

[0163]

[0173] Aspect 13: An apparatus for wireless communication, comprising at least one means for performing the method of one or more of aspects 1-10.

[0164]

[0174] Aspect 14: A non-transitory computer-readable medium having stored thereon code for wireless communication, the code comprising instructions executable by a processor to perform a method of one or more of aspects 1-10.

[0165]

[0175] Aspect 15: A non-transitory computer-readable medium having stored thereon a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method of one or more of aspects 1-10.

[0166]

[0176] The above disclosure provides illustration and description, and is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or acquired from practice of the embodiments.

[0167]

[0177] The term "component" as used herein shall be broadly construed as hardware and / or a combination of hardware and software. "Software" shall be broadly construed to mean, among other examples, 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, and / or functions, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. A processor as used herein is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware and / or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not intended to limit the aspects. Thus, it will be understood that the operation and behavior of the systems and / or methods are described herein without reference to any particular software code, and that software and hardware may be designed to implement the systems and / or methods based at least in part on the description herein.

[0168]

[0178] As used herein, satisfying a threshold may refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc., depending on the context.

[0169]

[0179] Although certain combinations of features have been recited in the claims and / or disclosed herein, these combinations do not limit the disclosure of the various aspects. Indeed, many of these features may be combined in ways not specifically recited in the claims and / or disclosed herein. Although each dependent claim described below may depend directly on only one claim, the disclosure of the various aspects includes each dependent claim in combination with any other claims in the claims. A phrase referring to "at least one of" a list of items described herein refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to include a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other order of a, b, and c).

[0170]

[0180] No element, act, or instruction used herein should be construed as critical or essential unless expressly described as such. Additionally, the articles "a" and "an" as used herein include one or more items and may be used interchangeably with "one or more." Additionally, the article "the" as used herein includes one or more items referenced in relation to the article "the" and may be used interchangeably with "one or more." Additionally, the terms "set" and "group" as used herein include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with "one or more." When only one item is intended, the phrase "only one" or similar language is used. Additionally, terms such as "has," "have," "having," and the like as used herein are intended to be open-ended terms. Additionally, the phrase "based on" is intended to mean "based at least in part on," unless otherwise specified. Also, as used herein, the term "or" is inclusive when used in a sequence and can be used interchangeably with "and / or" unless otherwise stated (e.g., when used in combination with "either" or "only one of").

Claims

1. A user equipment (UE) for wireless communications, comprising: one or more memories; one or more processors coupled to the one or more memories, the one or more processors comprising: measuring a first channel busy ratio (CBR) for a first beam group of a set of beam groups associated with the UE, the first beam group configured for sidelink communication; receiving, from a second UE, an indication of a second CBR based at least in part on measurements performed by the second UE, the second CBR being for a second beam group associated with the second UE, where the second beam group is configured for sidelink communications; transmitting a signal to the second UE using a beam included in the first beam group using one or more transmission parameters determined by the UE based at least in part on at least one of the first CBR or the second CBR; wherein the one or more transmission parameters are: The number of hybrid automatic repeat request retransmissions, or Channel Occupancy Limit At least one of: configured to: User Equipment (UE).

2. when the one or more processors measure the first CBR for the first beam group, receiving, from the second UE or one or more other UEs, an indication of a number of resources that have been or will be used to receive a signal by the second UE or the one or more other UEs using the beam or another beam included in the first beam group; determining the first CBR for the first beam group based at least in part on the number of resources used or to be used for receiving the signal by the second UE or the one or more other UEs; The UE of claim 1 , configured to:

3. When the one or more processors receive the indication of the number of resources used or to be used for receiving the signal by the second UE or the one or more other UEs, receiving the indication via at least one of an announce message or a physical sidelink feedback channel signal; The UE of claim 2 , configured to:

4. The UE of claim 1, wherein the measurement of a physical sidelink shared channel signal or a physical sidelink control channel signal is performed by the second UE using one or more beams included in the second beam group.

5. The UE described in claim 1, wherein the second beam group includes a receiving beam used by the second UE to receive the signal from the UE.

6. the one or more processors: determining the one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR; The UE of claim 1 , further configured to:

7. when the one or more processors determine the one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR, determining a highest CBR among the first CBR and the second CBR; determining the one or more transmission parameters based at least in part on the highest CBR; and The UE of claim 6, configured to:

8. when the one or more processors determine the one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR, determining a first transmission parameter included in the one or more transmission parameters based at least in part on the first CBR; determining a second transmission parameter included in the one or more transmission parameters based at least in part on the second CBR; The UE of claim 6, configured to:

9. the one or more processors: receiving, from a third UE, an indication of a third CBR for a third beam group associated with the third UE; transmitting a different signal to the third UE using beams included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the third CBR; The UE of claim 1 , further configured to:

10. 1. A method of wireless communication performed by a user equipment (UE), comprising: measuring a first channel busy ratio (CBR) for a first beam group of a set of beam groups associated with the UE, the first beam group configured for sidelink communication; receiving, from a second UE, an indication of a second CBR based at least in part on measurements performed by the second UE, the second CBR being for a second beam group associated with the second UE, where the second beam group is configured for sidelink communications; transmitting a signal to the second UE using a beam included in the first beam group using one or more transmission parameters determined by the UE based at least in part on at least one of the first CBR or the second CBR; wherein the one or more transmission parameters are: The number of hybrid automatic repeat request retransmissions, or Channel Occupancy Limit At least one of: A method for providing the above.

11. Measuring the first CBR for the first group of beams comprises: receiving, from the second UE or one or more other UEs, an indication of a number of resources that have been or will be used to receive a signal by the second UE or the one or more other UEs using the beam or another beam included in the first beam group; determining the first CBR for the first beam group based at least in part on the number of resources used or to be used for receiving the signal by the second UE or the one or more other UEs; The method of claim 10 comprising:

12. receiving the indication of the number of resources used or to be used by the second UE or the one or more other UEs to receive the signal; receiving the indication via at least one of an announce message or a physical sidelink feedback channel signal; The method of claim 11 , comprising:

13. The method of claim 10, further comprising: the measuring of a physical sidelink shared channel signal or a physical sidelink control channel signal is performed by the second UE using one or more beams included in the second beam group; or the second beam group includes a receiving beam used by the second UE to receive the signal from the UE; or determining the one or more transmission parameters based at least in part on at least one of the first CBR or the second CBR.

14. receiving, from a third UE, an indication of a third CBR for a third beam group associated with the third UE; transmitting a different signal to the third UE using beams included in the first beam group using one or more transmission parameters based at least in part on at least one of the first CBR or the third CBR; The method of claim 10 further comprising:

15. 15. A non-transitory computer readable medium having stored thereon a set of instructions for wireless communication, the set of instructions, when executed by one or more processors of a user equipment (UE), causing the UE to perform the method of any one of claims 10 to 14.

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