Frame-based listen before talk for radar

Abstract

Various aspects of the disclosure generally relate to wireless communication and radar detection. In some aspects, a radar device can perform an initial listen-before-talk (LBT) procedure at an initial LBT frame boundary associated with an initial LBT frame of a plurality of LBT frames, where the initial LBT frame has a frame length that is greater than a propagation delay associated with a maximum detectable range associated with the radar device, and transmit a radar signal based at least in part on a successful outcome of the initial LBT procedure or an additional LBT procedure. Numerous other aspects are provided.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to the following applications: U.S. Provisional Patent Application No. 62 / 705,792, filed July 15, 2020, entitled “FRAMEBASED LISTEN BEFORE TALK FOR RADAR”; and U.S. Non-Provisional Patent Application No. 17 / 305,793, filed July 14, 2021, entitled “FRAME BASED LISTEN BEFORE TALK FOR RADAR”, which are expressly incorporated herein by reference. Technical Field

[0003] In summary, various aspects of this disclosure relate to wireless communication and to frame-based listen-before-speak techniques and apparatus for radar. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support 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 / Improved LTE is an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standard released by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include several base stations (BSs) capable of supporting communication for multiple user equipments (UEs). UEs can communicate with the BS via downlinks and uplinks. A "downlink" (or "forward link") refers to the communication link from the BS to the UE, while an "uplink" (or "backlink") refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, Access Point (AP), Radio Headend, Transmit / Receive Point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global levels. NR (which can also be referred to as 5G) is an enhancement set of the LTE mobile standard released by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Spread Spectrum OFDM (DFT-s-OFDM)) on the uplink (UL), thereby better supporting mobile broadband internet access, as well as beamforming, multiple-input multiple-output (MIMO) antenna technologies, and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a radar device includes: performing an initial LBT process at the boundary of an initial LBT frame associated with an initial LBT frame among a plurality of Listen-Before-Speak (LBT) frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device; and transmitting radar signals based at least in part on the success of the initial LBT process or an additional LBT process.

[0008] In some aspects, a radar device for wireless communication includes: a memory; and one or more processors coupled to the memory, the processors being configured to: perform an initial LBT process at an initial LBT frame boundary associated with an initial LBT frame among a plurality of LBT frames, wherein the initial LBT frame has a frame length greater than a propagation delay associated with the maximum detectable range associated with the radar device; and transmit radar signals based at least in part on the success of the initial LBT process or an additional LBT process.

[0009] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of a radar device, cause the radar device to: perform an initial LBT process at an initial LBT frame boundary associated with an initial LBT frame among a plurality of LBT frames, wherein the initial LBT frame has a frame length greater than a propagation delay associated with the maximum detectable range associated with the radar device; and transmit a radar signal based at least in part on the success of the initial LBT process or an additional LBT process.

[0010] In some aspects, an apparatus for wireless communication includes: a unit for performing an initial LBT process at an initial LBT frame boundary associated with an initial LBT frame among a plurality of LBT frames, wherein the initial LBT frame has a frame length greater than a propagation delay associated with a maximum detectable range associated with the apparatus; and a unit for transmitting radar signals based at least in part on the success of the initial LBT process or an additional LBT process.

[0011] In general, the aspects include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems as fully described herein with reference to the accompanying drawings and description and as shown by the accompanying drawings and description.

[0012] The foregoing has provided a fairly broad overview of the features and technical advantages of examples according to this disclosure in order to better understand the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as this 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 manner of operation) and their associated advantages will be better understood when considered in conjunction with the accompanying drawings, based on the following description. Each drawing in the accompanying drawings is provided for illustrative and descriptive purposes and is not intended to limit the scope of the claims.

[0013] While aspects have been described in this disclosure by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented via integrated chip embodiments and other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, or AI-enabled devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. Devices incorporating the described aspects and features may include additional components and features for the implementation and enforcement of the claimed and described aspects. For example, the transmission and reception of wireless signals may include several components (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers) for analog and digital purposes. The innovations described herein are intended to be implemented in a variety of devices, components, systems, distributed arrangements, or end-user devices with different sizes, shapes, and configurations. Attached Figure Description

[0014] To gain a full understanding of the foregoing features of this disclosure, a more specific description of the invention, briefly summarized above, can be obtained by referring to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and are therefore not intended to limit the scope of the disclosure, as other equally valid aspects are permissible under this description. The same reference numerals in different drawings may identify the same or similar elements.

[0015] Figure 1 This is a diagram illustrating an example of a wireless network according to this disclosure.

[0016] Figure 2 This is a diagram illustrating an example of communication between a base station and a user equipment (UE) in a wireless network according to this disclosure.

[0017] Figure 3 and Figure 4 This is a diagram that conceptually illustrates an example of frequency-modulated continuous wave radar detection in accordance with this disclosure.

[0018] Figure 5 An example of frame-based listen-before-speak (LBT) for radar is shown in accordance with this disclosure.

[0019] Figure 6 This is a diagram illustrating an example process associated with an LBT used for radar according to this disclosure.

[0020] Figure 7 This is a block diagram of an example device for wireless communication and radar detection according to the present disclosure. Detailed Implementation

[0021] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, an apparatus or a method may be implemented using any number of the aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods implemented using structures, functionalities, or structures and functionalities other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0022] Several aspects of a telecommunications system will now be described with reference to various devices and techniques. These devices and techniques will be described in detail below and illustrated in the accompanying drawings, through various frames, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether such an element is implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0023] It should be noted that while this document may use terms commonly associated with 5G or NR radio access technology (RAT) to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0024] Figure 1This is a diagram illustrating an example of a wireless network 100 according to this disclosure. Wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, as well as other examples. 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 a 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 can provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0025] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed User Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1 In the examples shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0026] In some respects, the cell may not be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some respects, BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network via various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0027] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send the data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, repeater, etc.

[0028] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0029] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. BSs can also communicate with each other directly or indirectly via wireless or wired backhaul.

[0030] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, user unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet device, camera, gaming device, netbook, smartbook, ultrabook, medical device or apparatus, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), entertainment device (e.g., music or video device, or satellite radio unit), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0031] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or to a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links, for example. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing housing the components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0032] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0033] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary for communication with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols) and / or mesh networks. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described herein as being performed by base station 110.

[0034] Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices of the wireless network 100 may communicate using an operating band with a first frequency range (FR1) (spanning from 410 MHz to 7.125 GHz), and / or may communicate using an operating band with a second frequency range (FR2) (spanning from 24.25 GHz to 52.6 GHz). Frequencies between FR1 and FR2 are sometimes referred to as intermediate frequencies (IFs). Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the “sub-6 GHz” band. Similarly, FR2 is generally referred to as the “millimeter wave” band, although FR2 is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) designated as the “millimeter wave” band by the International Telecommunication Union (ITU). Therefore, unless explicitly stated otherwise, it should be understood that the terms “sub-6 GHz”, etc. (if used herein), can broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or intermediate frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise explicitly stated, it should be understood that the terms “millimeter wave” and the like (if used herein) can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequencies (e.g., less than 24.25 GHz). It is anticipated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0035] As pointed out above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0036] Figure 2 This is a diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, wherein generally, T ≥ 1 and R ≥ 1.

[0037] At base station 110, transmitting processor 220 can receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from each UE, process (e.g., code and modulate) the data for each UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Transmitting processor 220 can also process system information (e.g., semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, permission, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmitting processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can (e.g., for OFDM) process its corresponding output symbol stream to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t respectively.

[0038] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations, and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine the Reference Signal Received Power (RSRP) parameter, Received Signal Strength Indicator (RSSI) parameter, Reference Signal Received Quality (RSRQ) parameter, and / or CQI parameter, as well as other examples. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0039] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0040] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within the following: one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, and other examples. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include coplanar antenna element sets and / or non-coplanar antenna element sets. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements within a single housing and / or multiple antenna elements within housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements coupled to one or more transmitting and / or receiving components (such as...) Figure 2 One or more antenna elements (one or more components).

[0041] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting RSRP, RSSI, RSRQ, and / or CQI). The transmitting processor 264 can also generate reference symbols for one or more reference signals. Symbols from the transmitting processor 264 can be pre-coded (if applicable) by TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of UE 120 can be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264 and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 5-6 (Described).

[0042] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide decoded data to data sink 239 and decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communication. In some aspects, modulators and demodulators (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 5-6 (Described).

[0043] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other components may perform one or more techniques associated with frame-based listen-before-speak (LBT) for radar, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component can perform or direct, for example Figure 6 The operation of process 600 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, translation, and / or interpretation), these one or more instructions may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 6 The operation of process 600 and / or other processes as described herein. In some aspects, execution instructions may include run instructions, transformation instructions, compilation instructions, and / or interpretation instructions, as well as other examples.

[0044] In some aspects, the radar device (which may be, includes, or is included in base station 110, UE 120, etc.) may include: a unit for performing an initial LBT process at the boundary of an initial LBT frame associated with an initial LBT frame among a plurality of LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device; a unit for transmitting radar signals based at least in part on the successful result of the initial LBT process or an additional LBT process; etc. In some aspects, such a unit may include a combination of Figure 2 The described base station 110 includes one or more components, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc. In some aspects, such a unit may include a combination of... Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0045] Although Figure 2 The boxes in the diagram are shown as different components, but the functions described above with respect to these boxes can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by controller / processor 280 or under the control of controller / processor 280.

[0046] As pointed out above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 The example described.

[0047] Figure 3 This is a conceptual illustration of Example 300 associated with Frequency Modulated Continuous Wave (FMCW) radar detection according to this disclosure. Example 300 shows the repetition of FMCW chirp 305 (as indicated by the solid arrow above the "time" axis) in terms of frequency over time and the repetition of the received signal 310 (as indicated by the dashed arrow above the "time" axis).

[0048] In some aspects, for example, a single instance of the FMCW chirp 305 can be represented by a pair of arrows—an upward arrow indicating an increase from a first frequency value to a second frequency value, and a subsequent downward arrow indicating a decrease from the second frequency value to the first frequency value. Similarly, a single instance of the received signal 310 can be represented by a pair of arrows—an upward arrow indicating an increase from a first frequency value to a second frequency value, and a subsequent downward arrow indicating a decrease from the second frequency value to the first frequency value.

[0049] In some aspects, the FMCW chirp 305 can use waveform components (e.g., in...) Figure 7 The waveform component 710, etc., shown in the figure and discussed below, is generated by the waveform component (e.g., in the waveform component 710, etc.), and can be generated using a transmitting component (e.g., in the waveform component 710, etc.). Figure 7 The transmitting component 704, etc., shown in the diagram and discussed below, is used to transmit the signal. In some aspects, the receiving signal 310 can be transmitted by a receiving component (e.g., in...). Figure 7 The receiving component 702, etc., shown in the diagram and discussed below, receives the signal. In some aspects, the received signal 310 can be used to detect a target.

[0050] FMCW radar uses linear frequency modulated (LFM) signals to obtain range. The received signal is mixed with the transmitted signal to obtain a beat frequency 315 between the two. The beat frequency can be the difference between the instantaneous frequency of the FMCW chirp 305 and the corresponding instantaneous frequency of the received signal 310. The beat frequency can be a function of the round-trip time to the reflecting target and therefore can be directly mapped to its range. Beamforming associated with multiple receiver channels can be used to determine the direction of arrival (DoA) of the received signal, which can be correlated with the azimuth position of the target. Multiple radar signal chirps can be transmitted in time as a series of equally spaced pulses. Radial motion occurring between pulses within a resolution cell causes a shift on the pulse, which can be used to calculate the Doppler radial velocity in that cell. The received radar data can be expressed as a three-dimensional (3D) tensor, where the first two dimensions (range and DoA) constitute a polar space, and the third dimension (Doppler radial velocity) contains velocity information.

[0051] As pointed out above, Figure 3 This is provided merely as one or more examples. Other examples may differ from those provided. Figure 3 The example described.

[0052] Figure 4 An example of FMCW radar detection in accordance with this disclosure is shown. As shown, radar device 405 and radar device 410 can transmit signals 415 and 420, respectively.

[0053] Radar device 405 and / or radar device 410 may be, similar to, include, or be included in a base station (such as in...). Figure 1 and / or Figure 2 As shown in and combined Figure 1 and / or Figure 2 The described base station 110), UE (such as in Figure 1 and / or Figure 2 As shown in and combined Figure 1 and / or Figure 2 The radar device 405 and / or 410 (and / or the associated UE) may be implemented in one or more vehicles, as described in UE 120, etc. In some aspects, the radar device 405 and / or 410 (and / or the associated UE) may be implemented in one or more vehicles. These one or more vehicles may include any vehicle (including the radar device as described herein). For example, the vehicle may be a consumer vehicle, an industrial vehicle, a commercial vehicle, etc. The vehicle may be able to travel on public roads and / or provide traffic, may be able to be used in operations associated with a construction site (e.g., a construction site), etc. The vehicle may be autonomously and / or semi-autonomously controlled. Alternatively or concurrently, the vehicle may be controlled by an operator.

[0054] In some cases, radar device 405 may transmit signal 415 in full-duplex mode (e.g., data or radar signals may be transmitted and received simultaneously at radar device 405 or radar device 410). As an illustrative example, signals 415 and 420 may be examples of FMCW radar signals. In many cases, particularly when using other nearby FMCW radar devices, it can be difficult to distinguish between jamming and real targets. In some cases, this difficulty arises because the beat frequency calculated, at least in part, based on the difference between the instantaneous frequencies of transmitting the FMCW signal and receiving the jamming signal may not be distinguishable from the beat frequency associated with a reflecting target. This may be especially true when the jamming signal is a transmitted FMCW chirp from another nearby radar device. For example, radar device 405 may be moving toward radar device 410. Radar device 410 may be transmitting signal 420 (e.g., an FMCW radar signal) at the same time or on the same resources as 405 is transmitting signal 415. Therefore, radar equipment may trigger unnecessary actions based on false target detection, fail to trigger actions that should be triggered when a target is present due to interference, send additional radar chirps to try to distinguish the target, thereby increasing processing and communication resource consumption, etc.

[0055] Some implementations utilize the LBT (Local Time-Based Transmission) process to determine whether radio frequency resources are occupied or unoccupied. This allows wireless devices to avoid interference (e.g., a radar device can avoid transmitting or continue transmitting radar signals based on the result of one or more LBT processes indicating whether a resource set has been cleared for transmission). In such an LBT process, the radar device can perform the LBT operation based on the generated waveform of the signal (e.g., a radar signal), which may result in more accurate interference measurements for signaling on the resource set. For example, the radar device can identify a set of transmission parameters (e.g., transmission parameters for the chirp of an FMCW radar signal) and generate a waveform of the signal based on the parameters. The radar device can then mix the generated waveform with a received signal (e.g., received energy or a signal detected during channel sensing performed on the resource set) to determine whether the transmission of a signal with the generated waveform will cause or be interfered with by another signal from another radar device.

[0056] In some examples, the LBT process can be successful (e.g., interference measurements meet a threshold), and the radar device can use the set of transmission parameters to transmit a signal. In other examples, the LBT process may fail. In some examples, the radar device can perform another LBT process using a different set of transmission parameters. Alternatively, the radar device can choose the set of transmission parameters that results in the least transmission interference (e.g., in the case where the LBT fails when multiple sets of transmission parameters fail to meet a threshold). However, transmitting FMCW using different transmission parameters can still result in transmissions occurring simultaneously with interference transmissions. Furthermore, simply repeating the LBT process when it fails may result in the execution of multiple unnecessary LBT processes, which could lead to increased processing and communication resource consumption, etc.

[0057] According to the various techniques and apparatuses described herein, radar equipment can perform frame-based LBT processes, wherein the timing of the repetition of the LBT process is based on time frames configured according to a synchronization clock. In this way, the radar equipment can repeat the LBT process according to a schedule that facilitates shifting interference-associated beat frequencies out of band, making interference filtering possible. Therefore, aspects of the frame-based LBT process described herein can facilitate strategic timing of the LBT process to reduce the number of LBT processes performed while maintaining the benefits of performing LBT processes. In this way, aspects can facilitate a reduction in processing resources and power consumption used in determining radio resource occupancy, thereby facilitating effective FMCW radar detection, etc.

[0058] As pointed out above, Figure 4 This is provided as an example. Other examples may differ from the one provided. Figure 4 The example described.

[0059] Figure 5 Example 500 of frame-based LBT for radar equipment according to this disclosure is shown. (Combined with...) Figure 5 The aspects of the LBT technology described can be derived from radar equipment (such as, for example, Figure 4 The radar equipment shown is 405. Figure 4 The radar equipment shown (410, etc.) is used for execution.

[0060] In some aspects of the technology described herein, radar devices and other radar devices associated with a network may include a common time concept. For example, radar devices communicating wirelessly with a wireless network may include a synchronization clock and may be configured to synchronize the clock at least in part based on a geolocation system, a sidelink communication link, etc. In some aspects, for example, one or more radar devices may synchronize their clocks with each other via a sidelink communication link. In some aspects, global time may be maintained by a geolocation system server or other entity, and radar devices may synchronize their synchronization clocks at least in part based on communication with the geolocation system server or other entity.

[0061] As indicated by reference numeral 505 in the accompanying drawings, aspects of the frame-based LBT process described herein may be at least partially based on multiple LBT frames. Each LBT frame 505 may be defined by a pair of adjacent frame boundaries 510, 515, and may include a frame length T between frame boundaries 510 and 515. f In some respects, LBT frames 505 can be equally spaced—each of the multiple LBT frames can have an equal frame length T. f In this way, the first radar device, within a specified distance of the second radar device (e.g., within the maximum detectable range associated with one or more radar devices in the radar device, etc.), can determine, based on a synchronization clock, that a specific LBT frame boundary 510 or 515 occurs at the same time that the second radar device determines the LBT frame boundary 510 or 515 will occur. For example, the LBT frame boundary can be defined as occurring at t=0,T f 2T f 3T f ..., referencing an established t=0.

[0062] In some respects, an LBT frame can be defined as the chirp length T that makes the radar chirp (e.g., FMCW chirp)... c It can be an integer multiple of the frame length. For example, in some aspects, the chirp length T c =mT f Where m is an integer. In some aspects, the radar frame may begin at LBT frame boundaries 510, 515. A radar frame is a time frame for transmitting (or being configured to transmit) a series of radar chirps. In this way, the first chirp of a series of chirps may begin at LBT frame boundaries 510, 515. In some aspects, the frame length T f The propagation delay can be greater than the propagation delay associated with the maximum detectable range of the radar equipment. In some aspects, the propagation delay associated with the maximum detectable range can be less than the chirp length T. c .

[0063] As shown by reference numeral 520 in the attached figure, the radar equipment can be positioned at the initial LBT frame boundary 515 (t = T). f The initial LBT procedure is executed at ( ). The initial LBT procedure can be executed during the initial LBT period starting at the initial LBT frame boundary 515. The initial LBT period has a length greater than the chirp length T. c LBT duration T LBT Additional LBT procedures can be performed during an additional LBT period that begins at the boundary of a subsequent LBT frame. In this way, when an LBT procedure is configured to be executed, it can be performed within the time period [nT]. f ,nT f +T LBT The LBT procedure is executed during [a period], where n is an integer value. In some aspects, the LBT duration T LBT It can have a length equal to that of a radar frame (e.g., an FMCW frame).

[0064] In some aspects, the LBT process (e.g., initial LBT process, additional LBT process, etc.) can be performed at least in part based on a set of transmission parameters for the radar signal that the radar device intends to transmit. In some aspects, the transmission parameters can be examples of chirp parameters for the period of the FMCW radar signal. In some aspects, the transmission parameters can include carrier frequency, bandwidth scan range (e.g., waveforms can be transmitted across a 1 GHz range, a 1.5 GHz range, etc.), scan time (e.g., the radar device can complete a bandwidth scan of the waveform in 2 microseconds, 6 microseconds, 12 microseconds, etc.), scan direction (e.g., although any parameter indicating the scan direction can be used, the waveform chirp can be from 77 degrees to 78 degrees or from 78 degrees to 77 degrees), etc. The radar device can use the set of transmission parameters to determine (e.g., generate) a signal (e.g., Figure 4 The waveform of signal 415 shown. For example, radar equipment can generate an analog transmission waveform, but can avoid transmitting the signal for a period of time (e.g., zero power can be achieved using the transmission waveform until the LBT period is completed).

[0065] The radar device can use the generated waveform 525 to perform an LBT process. For example, the radar device can perform channel sensing on a set of resources (e.g., resources that the radar device intends to use to transmit the generated waveform) to determine whether the resources are blocked by another signal (e.g., by...). Figure 4 The radar device 410 shown transmits a signal 420. The radar device can adjust the received signal 530 (e.g., a received signal from a channel sensing process) based on the generated waveform 525. Adjusting the received signal 530 may include mixing the generated waveform 525 with the received energy associated with the received signal 530.

[0066] In some aspects, adjusting the received signal 530 may include processing the mixed output of waveform 525 and received signal 530 (e.g., mixer output). This processing may include filtering and performing spectrum analysis. Spectrum analysis may include performing a Fast Fourier Transform (FFT) on the output, which may produce measurements (e.g., the value of the peak of the mixed spectrum of waveform 525 and received signal 530). In some aspects, performing spectrum analysis may be used to determine the beat frequency corresponding to the LBT process. The beat frequency may be associated with the generated waveform 525 and received signal 530.

[0067] In some aspects, as indicated by reference numeral 535, different beat frequencies (associated with different LBT processes) can be represented as corresponding spikes in the range spectrum. In some aspects, the beat frequencies corresponding to certain LBT processes (e.g., those at t = 3T) f The beat frequency f corresponding to the third LBT process executed at the location b3 The filtered beat frequency becomes out-of-band and is therefore filtered out at least in part based on filter 540. In some aspects, the radar equipment may not detect the filtered beat frequency, in which case the radar equipment may determine the success of the LBT process (e.g., determine that the channel is idle) at least in part based on the determination that no beat frequency was detected in association with the LBT process.

[0068] The radar device can transmit a radar chirp corresponding to parameters associated with the generated waveform 525, at least in part, based on a confirmed success result. In some aspects, the radar chirp can be transmitted after the LBT period corresponding to a successful LBT process. In some aspects, the radar device can determine a success result by detecting multiple beat frequencies corresponding to multiple LBT frames and identifying a successful LBT frame among the multiple LBT frames. In some aspects, the amount of interference energy detected associated with a successful LBT frame can be less than the amount of interference energy detected associated with at least one other LBT frame among the multiple LBT frames. The radar device can transmit radar signals at the LBT frame boundary of a successful LBT frame.

[0069] In some aspects, the amount of interference energy detected in association with a successful LBT frame may be less than a threshold. In some aspects, the radar device may compare a spectral measurement with a threshold. For example, the radar device may compare the threshold value with the peak value of the spectrum obtained by processing the generated waveform 525 and the mixer output of the received signal 530 on a resource set. The radar device may determine whether the threshold is met based on the comparison. For example, the radar device may determine that the LBT process is successful (e.g., the result of the comparison of the LBT process indicates that transmitting a signal with the generated waveform 525 according to the transmission parameter set will result in a relatively low amount of interference in signal 530).

[0070] Radar equipment can determine the unsuccessful outcome of an LBT process, at least in part, based on the detected beat frequency. In some aspects, the radar equipment can schedule an additional LBT process to occur at the boundary of an additional LBT frame associated with that additional LBT frame, which occurs after the LBT frame and the LBT period corresponding to the unsuccessful outcome. In some aspects, the chirp length T... c It might not be T. f In the case of an integer multiple of the number of LBTs, the radar device can perform additional LBT procedures (e.g., LBT procedures corresponding to each LBT frame boundary within a radar frame) to detect the idle channel.

[0071] As pointed out above, Figure 5 This is provided as an example. Other examples may differ from the one provided. Figure 5 The example described.

[0072] Figure 6 This is a diagram illustrating an example process 600 performed, for example, by a radar device according to this disclosure. Example process 600 is in which a radar device (e.g., in conjunction with...) Figure 4 The radar device 405 described, combined with Figure 4 The radar device 410 described, combined with Figure 5 Examples of radar devices (such as radar) performing operations associated with frame-based LBTs used for radar.

[0073] like Figure 6 As shown, in some aspects, process 600 may include performing an initial LBT process at an initial LBT frame boundary associated with an initial LBT frame among a plurality of LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device (box 610). For example, a radar device (e.g., using transmit processor 220, transmit processor 264, receive processor 238, receive processor 258, controller / processor 240, controller / controller 280, memory 242, memory 282, etc.) may perform the initial LBT process at an initial LBT frame boundary associated with an initial LBT frame among a plurality of LBT frames, as described above. In some aspects, the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device.

[0074] like Figure 6As further shown, in some aspects, process 600 may include transmitting radar signals at least in part based on the successful results of an initial LBT process or an additional LBT process (block 620). For example, a radar device (e.g., using transmit processor 220, transmit processor 264, controller / processor 240, controller / controller 280, memory 242, memory 282, etc.) may transmit radar signals at least in part based on the successful results of an initial LBT process or an additional LBT process, as described above.

[0075] Process 600 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0076] In the first aspect, performing the initial LBT procedure includes performing the initial LBT procedure during the initial LBT period that begins at the boundary of the initial LBT frame.

[0077] In the second aspect, either alone or in combination with the first aspect, the initial LBT period has an LBT duration, wherein the LBT duration is greater than the chirp length.

[0078] In the third aspect, either alone or in combination with one or more of the first and second aspects, the chirp length is an integer multiple of the frame length.

[0079] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the LBT duration is equal to the radar frame length associated with the radar frame, wherein the radar frame corresponds to multiple radar chimes.

[0080] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, radar frames include FMCW frames.

[0081] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, additional LBT frames in a plurality of LBT frames have a length equal to the frame length.

[0082] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 600 includes: determining a plurality of LBT frames based at least in part on a synchronization clock associated with the network.

[0083] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, process 600 includes: synchronizing a synchronization clock based at least in part on at least one of a geolocation system or a sidelink communication link.

[0084] In the ninth aspect, performing the initial LBT process, either alone or in combination with one or more of the first to eighth aspects, includes performing the initial LBT process based at least in part on the set of transmission parameters for the radar signal.

[0085] In the tenth aspect, transmitting radar signals, either alone or in combination with one or more of the first to ninth aspects, includes transmitting radar signals at a transmission time following the completion of the initial LBT process or an additional LBT process.

[0086] In the eleventh aspect, either alone or in combination with one or more aspects from the first to the tenth aspects, process 600 includes: determining an unsuccessful outcome of the initial LBT process; and scheduling an additional LBT process to occur at the boundary of an additional LBT frame associated with the additional LBT frame, which occurs after the initial LBT frame and the initial LBT period.

[0087] In the twelfth aspect, either alone or in combination with one or more aspects from the first to the eleventh aspects, the propagation delay is less than the chirp length.

[0088] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the initial LBT process is at least partially based on the beat frequency band corresponding to the maximum detectable range.

[0089] In the fourteenth aspect, either alone or in combination with one or more aspects from the first to the tenth aspects, process 600 includes: determining the success result of the initial LBT process or the additional LBT process, wherein determining the success result includes: determining that a beat frequency has not yet been detected in association with the initial LBT process or the additional LBT process.

[0090] In the fifteenth aspect, either alone or in combination with one or more aspects from the first to the tenth aspects, process 600 includes: determining a successful result of an initial LBT process or an additional LBT process, wherein determining a successful result includes: detecting a plurality of beat frequencies corresponding to a plurality of LBT frames; and determining a successful LBT frame among the plurality of LBT frames, wherein the amount of interference energy detected associated with the successful LBT frame is less than the amount of interference energy detected associated with at least one other LBT frame among the plurality of LBT frames, and wherein transmitting a radar signal includes: transmitting a radar signal at the LBT frame boundary of the successful LBT frame.

[0091] In the sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the radar device is associated with at least one of a wireless communication device, a user equipment, or a vehicle.

[0092] Although Figure 6An example box of process 600 is shown, but in some aspects, process 600 may include... Figure 6 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 600 may be executed in parallel.

[0093] Figure 7 This is a block diagram of an example device 700 for wireless communication and radar detection. Device 700 can be a radar device (e.g., combined with...). Figure 4 The radar device 405 described, combined with Figure 4 The radar device 410 described, combined with Figure 5 The described radar equipment, combined Figure 6 The described radar device, etc., or the radar device may include device 700. In some aspects, device 700 includes a receiving component 702 and a transmitting component 704, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 700 can use the receiving component 702 and the transmitting component 704 to communicate with another device 706 (such as a UE, a base station, or another wireless communication device). As further shown, device 700 may include one or more of parameter component 708, waveform component 710, and / or LBT component 712, as well as other examples.

[0094] In some respects, device 700 can be configured to perform the functions described herein. Figure 5 One or more operations described herein. Alternatively or concurrently, the apparatus 700 may be configured to perform one or more processes described herein, such as... Figure 6 The process is 600. In some aspects, Figure 7 The device 700 and / or one or more components shown may include the elements described above. Figure 2 One or more components of the described UE 120. Alternatively or additionally, Figure 7 One or more components shown can be combined with the above. Figure 2 The description is implemented within one or more components. Alternatively, one or more components in the set of components may be implemented, at least partially, as software stored in 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.

[0095] Receiver 702 can receive signals such as reference signals, control information, data communications, received signals (e.g., a received signal), or combinations thereof. In some aspects, receiver 702 can receive communications from device 706. Receiver 702 can provide the received signals to one or more other components of device 700. In some aspects, receiver 702 can perform signal processing on the received signals (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and can provide the processed signals to one or more other components of device 700. In some aspects, receiver 702 can include the combinations described above. Figure 2 The UE120 described includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memories, or combinations thereof.

[0096] Transmitting component 704 can transmit signals such as reference signals, control information, data communications, radar signals (e.g., FMCW chirps), or combinations thereof. In some aspects, transmitting component 704 can transmit communications to device 706. In some aspects, one or more other components of device 706 can generate communications and provide the generated communications to transmitting component 704 for transmission to device 706. In some aspects, transmitting component 704 can perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated signals and can transmit the processed signals. In some aspects, transmitting component 704 can include the combinations described above. Figure 2 The described UE 120 includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 704 may be co-located with the receive component 702 in a transceiver.

[0097] Parameter component 708 can identify a set of transmission parameters for signals transmitted from a radar device. Parameter component 708 may include a memory. Parameter component 708 may include one or more processors operatively coupled to the memory. In some aspects, the one or more processors may be configured to identify the set of transmission parameters. Parameter component 708 may include one or more instructions that, when executed by one or more processors of the radar device, cause the radar device to identify the set of transmission parameters for signals transmitted from the radar device. Parameter component 708 may include units for identifying the set of transmission parameters for signals transmitted from the radar device.

[0098] Waveform component 710 can generate a transmission waveform of a signal on a set of radio resources based on a set of transmission parameters. Waveform component 710 may include a memory. Waveform component 710 may include one or more processors operatively coupled to the memory. In some aspects, the one or more processors may be configured to generate waveforms. Waveform component 710 may include one or more instructions that, when executed by one or more processors of the radar device, cause the radar device to generate a transmission waveform of a signal on a set of radio resources based on the set of transmission parameters. Waveform component 710 may include units for generating a transmission waveform of a signal on a set of radio resources based on the set of transmission parameters.

[0099] LBT component 712 can perform an initial LBT process at the boundary of an initial LBT frame associated with an initial LBT frame among multiple LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device. Transmission component 704 can transmit radar signals based at least in part on the successful result of the initial LBT process or an additional LBT process.

[0100] LBT component 712 may include a memory. LBT component 712 may include one or more processors operatively coupled to the memory. The one or more processors may be configured to perform LBT procedures. LBT component 712 may include one or more instructions that, when executed by one or more processors of the radar device, cause the radar device to perform one or more LBT procedures.

[0101] LBT component 712 may include units for performing an initial LBT process at the boundary of an initial LBT frame associated with an initial LBT frame among a plurality of LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the device. Transmission component 704 may include units for transmitting radar signals based at least in part on the successful result of the initial LBT process or an additional LBT process.

[0102] Figure 7 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 7 The components shown are compared to additional components, fewer components, different components, or components arranged in a different way. Furthermore, Figure 7 The two or more components shown can be implemented within a single component, or Figure 7 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 7 The set (one or more) components shown can perform actions described by Figure 7 The other set of components shown performs one or more functions.

[0103] The following provides a summary of some aspects of this disclosure:

[0104] Aspect 1: A method for wireless communication performed by a radar device, comprising: performing an initial LBT process at an initial LBT frame boundary associated with an initial LBT frame among a plurality of Listen-Before-Speak (LBT) frames, wherein the initial LBT frame has a frame length greater than a propagation delay associated with a maximum detectable range associated with the radar device; and transmitting a radar signal based at least in part on a successful result of the initial LBT process or an additional LBT process.

[0105] Aspect 2: According to the method of aspect 1, wherein performing the initial LBT process includes performing the initial LBT process during an initial LBT period starting at the boundary of the initial LBT frame.

[0106] Aspect 3: According to the method of aspect 2, wherein the initial LBT period has an LBT duration, wherein the LBT duration is greater than the chirp length.

[0107] Aspect 4: According to the method of aspect 3, wherein the chirp length is an integer multiple of the frame length.

[0108] Aspect 5: The method according to any one of Aspects 3 or 4, wherein the LBT duration is equal to the radar frame length associated with the radar frame, wherein the radar frame corresponds to a plurality of radar chirps.

[0109] Aspect 6: According to the method of aspect 5, wherein the radar frame includes a frequency-hopping continuous wave frame.

[0110] Aspect 7: The method according to any one of Aspects 1-6, wherein the additional LBT frames among the plurality of LBT frames have a length equal to the frame length.

[0111] Aspect 8: The method according to any one of Aspects 1-7 further includes: determining the plurality of LBT frames based at least in part on a synchronization clock associated with the network.

[0112] Aspect 9: The method according to aspect 8 further includes: synchronizing the synchronization clock based at least in part on at least one of the following: a geolocation system, or a sidelink communication link.

[0113] Aspect 10: The method according to any one of Aspects 1-9, wherein performing the initial LBT process comprises: performing the initial LBT process at least in part based on a set of transmission parameters for the radar signal.

[0114] Aspect 11: The method according to any one of Aspects 1-10, wherein transmitting the radar signal comprises: transmitting the radar signal at a transmission time after the completion of the initial LBT process or the additional LBT process.

[0115] Aspect 12: The method according to any one of Aspects 1-11 further includes: determining an unsuccessful result of the initial LBT process; and scheduling the additional LBT process to occur at the boundary of an additional LBT frame associated with the additional LBT frame, the additional LBT frame occurring after the initial LBT frame and the initial LBT period.

[0116] Aspect 13: The method according to any one of Aspects 1-12, wherein the propagation delay is less than the chirp length.

[0117] Aspect 14: The method according to any one of Aspects 1-13, wherein the initial LBT process is at least partially based on the beat frequency band corresponding to the maximum detectable range.

[0118] Aspect 15: The method according to any one of Aspects 1-11 further includes: determining the success result of the initial LBT process or the additional LBT process, wherein determining the success result includes: determining that a beat frequency has not been detected in association with the initial LBT process or the additional LBT process.

[0119] Aspect 16: The method according to any one of Aspects 1-11 further includes: determining the success result of the initial LBT process or the additional LBT process, wherein determining the success result includes: detecting a plurality of beat frequencies corresponding to the plurality of LBT frames; and determining a successful LBT frame among the plurality of LBT frames, wherein the amount of interference energy detected associated with the successful LBT frame is less than the amount of interference energy detected associated with at least one other LBT frame among the plurality of LBT frames, wherein transmitting the radar signal includes: transmitting the radar signal at the LBT frame boundary of the successful LBT frame.

[0120] Aspect 17: The method according to any one of Aspects 1-16, wherein the radar device is associated with at least one of: a wireless communication device, a user equipment, or a vehicle.

[0121] Aspect 18: An apparatus for wireless communication at 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 the method according to one or more of aspects 1-17.

[0122] Aspect 19: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the method according to one or more of aspects 1-17.

[0123] Aspect 20: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 1-17.

[0124] Aspect 21: A non-transitory computer-readable medium storing code for wireless communication, said code comprising instructions executable by a processor to perform the methods described in accordance with one or more of aspects 1-17.

[0125] Aspect 22: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 1-17.

[0126] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made based on the foregoing disclosure, or modifications and variations may be derived from practice in the aspects.

[0127] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, "software" should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, and other examples. As used herein, processors are implemented using hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented using various forms of hardware and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not a limitation in any respect. Therefore, while the operation and behavior of systems and / or methods are described herein without reference to specific software code, it is to be understood that software and hardware can be designed to implement systems and / or methods, at least in part, based on the descriptions herein.

[0128] As used in this article, depending on the context, satisfying the threshold can refer to a value 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.

[0129] Even if a specific combination of features is recited in the claims and / or disclosed in the specification, such combinations are not intended to limit the disclosure of the aspects. In fact, many of these features can be combined in ways that are not specifically recited in the claims and / or specifically disclosed in the specification. While each dependent claim listed below may directly depend on only one claim, the disclosure of an aspect includes a combination of each dependent claim with every other claim in the claim set. As used herein, the phrase “at least one of” in the list of items refers to any combination of those items, including individual members. For example, “at least one of the following: a, b, or c” is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination of multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0130] None of the elements, actions, or instructions used herein should be construed as critical or essential unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items referenced in combination with the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to 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.” Where only one item is anticipated, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, the term “or” is intended to be inclusive when used in a series, and may be used interchangeably with “and / or” unless otherwise expressly stated (e.g., if used in conjunction with “any” or “only one of”).

Claims

1. A radar device for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to: An initial LBT process is performed at the boundary of an initial LBT frame associated with an initial LBT frame in a plurality of listen-before-speak LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device. as well as Radar signals are transmitted based at least in part on the successful results of the initial LBT process or the additional LBT process.

2. The radar device according to claim 1, wherein, The one or more processors are configured to execute the initial LBT process during an initial LBT period that begins at the boundary of the initial LBT frame.

3. The radar device according to claim 2, wherein, The initial LBT period has an LBT duration, wherein the LBT duration is greater than the chirp length.

4. The radar device according to claim 3, wherein, The chirp length is an integer multiple of the frame length.

5. The radar device according to claim 3, wherein, The LBT duration is equal to the radar frame length associated with the radar frame, wherein the radar frame corresponds to multiple radar chimes.

6. The radar device according to claim 5, wherein, The radar frames include frequency-modulated continuous wave frames.

7. The radar device according to claim 1, wherein, The additional LBT frames among the plurality of LBT frames have a length equal to the frame length.

8. The radar device according to claim 1, wherein, The one or more processors are also configured to determine the plurality of LBT frames based at least in part on a synchronization clock associated with the network.

9. The radar device according to claim 8, wherein, The one or more processors are also configured to synchronize the synchronization clock based at least in part on at least one of the following: Geographic positioning system, or Side link communication link.

10. The radar device according to claim 1, wherein, The one or more processors are configured, when executing the initial LBT process, to execute the initial LBT process based at least in part on the set of transmission parameters for the radar signal.

11. The radar device according to claim 1, wherein, The one or more processors are configured to transmit the radar signal at a transmission time following the completion of the initial LBT process or the additional LBT process.

12. The radar device according to claim 1, wherein, The one or more processors are further configured to: Determine the unsuccessful result of the initial LBT process; and The additional LBT process is scheduled to occur at the boundary of the additional LBT frame associated with the additional LBT frame, which occurs after the initial LBT frame and the initial LBT period.

13. The radar device according to claim 1, wherein, The propagation delay is less than the chirp length.

14. The radar device according to claim 1, wherein, The initial LBT process is based, at least in part, on the beat frequency band corresponding to the maximum detectable range.

15. The radar device according to claim 1, wherein, The one or more processors are further configured to: determine the success result of the initial LBT process or the additional LBT process. The one or more processors, when determining the success result, are configured to: determine that a beat frequency has not yet been detected in association with the initial LBT process or the additional LBT process.

16. The radar device according to claim 1, wherein, The one or more processors are further configured to: determine the success result of the initial LBT process or the additional LBT process. Wherein, the one or more processors are configured to: Detect multiple beat frequencies corresponding to the plurality of LBT frames; and A successful LBT frame is identified among the plurality of LBT frames, wherein the amount of interference energy detected in association with the successful LBT frame is less than the amount of interference energy detected in association with at least one other LBT frame among the plurality of LBT frames.

17. The radar device according to claim 1, wherein, The radar device is associated with at least one of the following: Wireless communication equipment User equipment, or vehicle.

18. A method for wireless communication performed by a radar device, comprising: An initial LBT process is performed at the boundary of an initial LBT frame associated with an initial LBT frame in a plurality of listen-before-speak LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device; and Radar signals are transmitted based at least in part on the successful results of the initial LBT process or the additional LBT process.

19. The method according to claim 18, wherein, Performing the initial LBT procedure includes performing the initial LBT procedure during the initial LBT period that begins at the boundary of the initial LBT frame.

20. The method according to claim 19, wherein, The initial LBT period has an LBT duration, wherein the LBT duration is greater than the chirp length.

21. The method according to claim 20, wherein, The chirp length is an integer multiple of the frame length.

22. The method according to claim 20, wherein, The LBT duration is equal to the radar frame length associated with the radar frame, wherein the radar frame corresponds to multiple radar chimes.

23. The method according to claim 18, wherein, The additional LBT frames among the plurality of LBT frames have a length equal to the frame length.

24. The method of claim 18, further comprising: Determine the unsuccessful outcome of the initial LBT process; as well as The additional LBT process is scheduled to occur at the boundary of the additional LBT frame associated with the additional LBT frame, which occurs after the initial LBT frame and the initial LBT period.

25. The method according to claim 18, wherein, The propagation delay is less than the chirp length.

26. The method according to claim 18, wherein, The initial LBT process is based, at least in part, on the beat frequency band corresponding to the maximum detectable range.

27. The method of claim 18, further comprising: Determine the success result of the initial LBT process or the additional LBT process. Determining the success result includes: determining that a beat frequency has not been detected in association with the initial LBT process or the additional LBT process.

28. The method of claim 18, further comprising: Determine the success result of the initial LBT process or the additional LBT process. The determination of the success result includes: Detect multiple beat frequencies corresponding to the plurality of LBT frames; and A successful LBT frame is identified among the plurality of LBT frames, wherein the amount of interference energy detected associated with the successful LBT frame is less than the amount of interference energy detected associated with at least one other LBT frame among the plurality of LBT frames. Sending the radar signal includes sending the radar signal at the LBT frame boundary of the successful LBT frame.

29. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions, which, when executed by one or more processors of the radar device, cause the radar device to perform the following operations: An initial LBT process is performed at the boundary of an initial LBT frame associated with an initial LBT frame in a plurality of listen-before-speak LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the radar device; and Radar signals are transmitted based at least in part on the successful results of the initial LBT process or the additional LBT process.

30. An apparatus for wireless communication, comprising: A unit for performing an initial LBT process at the boundary of an initial LBT frame associated with an initial LBT frame among multiple listen-before-speak LBT frames, wherein the initial LBT frame has a frame length greater than the propagation delay associated with the maximum detectable range associated with the device; and A unit for transmitting radar signals based at least in part on the successful results of the initial LBT process or the additional LBT process.

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