Perceived headroom reporting in wireless networks

Abstract

An implementation of a sensed headroom report (HR), i.e., generating a sensed HR and adjusting transmit power and other parameters, is described. A device transmits a radar wireless signal at a first transmit power from one or more transmit chains. The device also senses the radar wireless signal. The device generates a sensed HR based on sensing the radar wireless signal. The sensed HR may include one or more indications of a metric related to the received power, such as a transmit power headroom, a sensed headroom, or a combination of self-interference power, noise, and received power. The device provides the sensed HR to another device in a wireless network (e.g., via a base station and / or a core network to a radar server), and the other device may determine a transmit power or other device parameter to be used for sensing.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to and the benefit of Greek Patent Application No. 20210100174, entitled "SENSING HEADROOM REPORTS IN WIRELESS NETWORKS," filed March 18, 2021, which is assigned to the assignee of the present application and is expressly incorporated herein by reference in its entirety.

[0002] The subject matter disclosed herein relates to determining transmit power for object or motion sensing in wireless networks, and more particularly, to generating a sensing headroom report for determining transmit power for sensing. [Background technology]

[0003] User equipment (UE), such as a cellular phone or other device in a wireless network, may use radio frequency (RF) signals to sense objects or object movement in the device's environment. Determining whether an object is present or moving in the device's environment may be useful or necessary for several applications, including localization, environmental mapping, depth ranging, and navigation. RF signals that may be used may be specified for various wireless systems, such as cellular networks implemented according to 4G (also called fourth generation) Long Term Evolution (LTE) radio access or 5G (also called fifth generation) "New Radio" (NR), or wireless networks implemented according to the Institute of Electrical and Electronics Engineers (IEEE) 802.11 set of standards. The device includes at least two co-located antennas, with one antenna for transmitting an RF signal over a wireless channel and the other antenna for concurrently receiving reflections of the RF signal over the wireless channel. The device senses reflections of the transmitted signal at a receive antenna, where the round-trip time (RTT) of the reflection is related to the depth of the object in the device's environment (e.g., based on radio detection and ranging (radar) techniques). The device transmits the sensing RF signal at a transmit power. Improvements in sensing and adjusting the sensing transmit power are desirable. Summary of the Invention [Means for solving the problem]

[0004] In one implementation, a method for generating a sensed headroom report (HR) in a wireless network may be performed by a base station or a user equipment (UE). The sensed HR may be used by another component in the wireless network to determine a transmit power to be used by the device for sensing. The device transmits a radio detection and ranging (radar) wireless signal over a wireless medium at a first transmit power. The device also directly senses a radar wireless signal from at least one transmit chain of the first device. The device generates the sensed HR based on the received power during sensing of the radar wireless signal. The sensed HR includes one or more indications of a metric related to the received power, such as transmit power headroom, sensed headroom, or a combination of self-interference power, noise power, and received power. The device provides the sensed HR to another device in the wireless network (e.g., via a base station and / or a core network to a radar server in a cellular network), and the other device may determine a transmit power to be used for sensing by the device based on the metric.

[0005] In one implementation, a method of generating a sensed HR by a first device in a wireless network includes transmitting a radar wireless signal over a wireless medium at a first transmit power from one or more transmit chains of the first device, sensing the radar wireless signal, generating the sensed HR based on sensing the radar wireless signal, and providing the sensed HR to a network entity in the wireless network.

[0006] In one implementation, a device in a wireless network configured to generate a sensed HR includes at least one transceiver, at least one memory, and at least one processor coupled to the at least one transceiver and the at least one memory. The at least one processor is configured to cause the device to transmit, via the at least one transceiver, a radar wireless signal over a wireless medium from one or more transmit chains at a first transmit power, sense, via the at least one transceiver, the radar wireless signal, generate, via the at least one processor, the sensed HR based on sensing the radar wireless signal, and provide, via the at least one transceiver, the sensed HR to a network entity in the wireless network.

[0007] In one implementation, a non-transitory computer-readable medium stores instructions that, when executed by at least one processor of a device in a wireless network configured to generate a sensed HR, cause the device to transmit a radar wireless signal over a wireless medium from one or more transmit chains via at least one transceiver at a first transmit power, sense the radar wireless signal via the at least one transceiver, generate, via the at least one processor, a sensed HR based on sensing the radar wireless signal, and provide, via the at least one transceiver, the sensed HR to a network entity in the wireless network.

[0008] In one implementation, a device in a wireless network for generating a sensed HR includes means for transmitting a radar wireless signal over a wireless medium at a first transmit power from one or more transmit chains, means for sensing the radar wireless signal, means for generating the sensed HR based on sensing the radar wireless signal, and means for providing the sensed HR to a network entity in the wireless network.

[0009] Other objects and advantages associated with the embodiments disclosed herein will become apparent to those skilled in the art based on the accompanying drawings and detailed description.

[0010] The accompanying drawings are presented to aid in the explanation of various aspects of the present disclosure and are provided only to illustrate, not limit, the aspects. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 illustrates an example wireless communication system according to various aspects of the present disclosure. [Figure 2] 2 is a block diagram of a design of a base station and a user equipment (UE), which may be one of the base stations and one of the UEs in FIG. 1. [Figure 3] FIG. 1 illustrates a UE capable of supporting motion detection services in a wireless network. [Figure 4] FIG. 1 illustrates a base station capable of supporting motion detection services in a wireless network. [Figure 5] FIG. 1 illustrates the transmission of radar signals by a device and sensing reflections for a monostatic radar solution. [Figure 6] 6 is a flowchart for an example method 600 for generating a perceived headroom report (HR) in a wireless network. [Figure 7] 7 is a flowchart for an example method 700 of additional operations that may be performed in generating a sensing HR in a wireless network. [Figure 8] 8 is a flowchart for an example method 800 for determining a final transmit power for transmitting a radar wireless signal. DETAILED DESCRIPTION OF THE INVENTION

[0012] Aspects of the present disclosure are provided in the following description and related drawings, which are directed to various examples provided for illustrative purposes. Alternative aspects may be devised without departing from the scope of the present disclosure. Additionally, well-known elements of the present disclosure will not be described in detail or will be omitted so as not to obscure the relevant details of the present disclosure.

[0013] The words "exemplary" and / or "example" are used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" and / or "example" is not necessarily to be construed as preferred or advantageous over other aspects. Likewise, the term "aspects of the present disclosure" does not require that all aspects of the present disclosure include the discussed feature, advantage or mode of operation.

[0014] Those skilled in the art will appreciate that the information and signals described below may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the following description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof, depending in part on the particular application, in part on the desired design, in part on the corresponding technology, etc.

[0015] Further, many aspects are described in terms of sequences of actions to be performed, for example, by elements of a computing device. It will be recognized that the various actions described herein can be performed by specific circuitry (e.g., an application-specific integrated circuit (ASIC)), by program instructions executed by one or more processors, or by a combination of both. Additionally, the sequences of actions described herein may be considered to be embodied entirely in any form of non-transitory computer-readable storage medium storing a corresponding set of computer instructions that, when executed, cause or instruct the associated processor(s) of the device to perform the functionality described herein. Accordingly, various aspects of the present disclosure may be embodied in several different forms, all of which are contemplated to be within the scope of the claimed subject matter. Additionally, for each aspect described herein, the corresponding form of any such aspect may be described herein, for example, as “logic configured to” perform the described actions.

[0016] The terms “user equipment (UE)” and “base station,” as used herein, are not intended to be specific to or otherwise limited to any particular radio access technology (RAT) unless otherwise specified. In general, a UE may be any wireless communication device (e.g., a mobile phone, a router, a tablet computer, a laptop computer, a tracking device, a wearable (e.g., a smart watch, smart glasses, an augmented reality (AR) / virtual reality (VR) headset, etc.), a vehicle (e.g., an automobile, a motorcycle, a bicycle, etc.), an Internet of Things (IoT) device, etc.) used by a user to communicate over a wireless communication network. A UE may be mobile or may be stationary (e.g., at some times) and may communicate with a radio access network (RAN). As used herein, the term “UE” may be referred to interchangeably as an “access terminal” or “AT,” a “client device,” “wireless device,” “subscriber device,” “subscriber terminal,” “subscriber station,” “user terminal” or UT, a “mobile terminal,” “mobile station,” “mobile device,” or variations thereof. In general, a UE can communicate with a core network via a RAN, through which the UE can be connected to external networks such as the Internet and to other UEs. Of course, other mechanisms for connecting to the core network and / or the Internet are also possible for a UE, such as via a wired access network, a wireless local area network (WLAN) network (e.g., based on IEEE 802.11, etc.), etc.

[0017] A base station may operate according to one of several RATs with which it communicates with UEs, depending on the network in which it is deployed, and may alternatively be referred to as an access point (AP), network node, Node B, evolved Node B (eNB), New Radio (NR) Node B (also referred to as gNB), etc. Additionally, in some systems, a base station may simply provide edge node signaling functionality, while in other systems, a base station may provide additional control and / or network management functionality. A communication link through which a UE can transmit signals to a base station is referred to as an uplink (UL) channel or a reverse link channel (e.g., a reverse traffic channel, a reverse control channel, an access channel, etc.). A communication link through which a base station can transmit signals to a UE is referred to as a downlink (DL) or a forward link channel (e.g., a paging channel, a control channel, a broadcast channel, a forward traffic channel, etc.). As used herein, the term traffic channel (TCH) can refer to either a UL / reverse traffic channel or a DL / forward traffic channel.

[0018] The term "base station" can refer to a single physical transmit receiving point (TRP) or multiple physical TRPs, which may or may not be co-located. For example, when the term "base station" refers to a single physical TRP, the physical TRP may be the base station's antenna corresponding to the base station's cell. When the term "base station" refers to multiple co-located physical TRPs, the physical TRP may be the base station's array of antennas (e.g., as in a multiple-input multiple-output (MIMO) system or when the base station employs beamforming). When the term "base station" refers to multiple non-co-located physical TRPs, the physical TRPs may be a distributed antenna system (DAS) (a network of spatially separated antennas connected to a common source via a transport medium) or a remote radio head (RRH) (a remote base station connected to a serving base station). Alternatively, the non-co-located physical TRPs may be the serving base station that receives measurement reports from the UE and neighboring base stations whose reference radio frequency (RF) signals the UE is measuring.

[0019] Radar solutions for ranging or motion detection may be implemented by devices in a wireless network, such as a cellular network or a wireless local area network (WLAN). Solutions may be specified in the 3rd Generation Partnership Project (3GPP®) set of standards for LTE (4G) and New Radio (NR) for fifth generation (5G). Solutions may also be specified in the Institute of Electrical and Electronics Engineers (IEEE) 802.11 set of standards for WLAN. Also or alternatively, a device may be configured to perform radar. A monostatic radar system includes a device that both transmits RF signals for radar (called radar signals) and receives reflections of the radar signals. The monostatic radar system may be for identifying a motion state of the transmitting / receiving device or for identifying objects in the environment of the transmitting / receiving device. In a monostatic radar system, a device (e.g., a base station (e.g., an AP or gNB) or a UE (e.g., a smartphone)) may be configured to transmit radar signals and sense reflections of radar signals to determine the RTT of the radar signals and the distance of objects reflecting the radar signals. The wireless transceiver of the device is configured to transmit a predetermined radar signal for sensing (e.g., a specific reference signal (RS) resource, an RF signal at a particular time, or an RF signal at a particular frequency), and the wireless transceiver of the device is configured to sense reflections of the predetermined radar signal (e.g., sense a particular RS resource, an RF signal during a particular time window, or an RF signal at a particular frequency).

[0020] The transmit power of a radar signal affects the quality of a radar solution. For example, if the transmit power is too low, noise and other interference may prevent the device from successfully sensing the reflection of the radar signal. If the transmit power of the radar signal is too high, the received signal during sensing may reach a power level saturation point, preventing the device from successfully sensing the reflection of the radar signal. A device may be configured to adjust the transmit power for wireless communication, as may be specified by the 3GPP® and IEEE 802.11 standards. For example, the transmit power may be based on an RS strength indicator (RSSI) provided by the receiving device. However, the transmit power setting for wireless communication may not be suitable for sensing in a radar solution. For example, a device directly senses radar signals from at least one transmit chain of the device in a receive chain. The radar signals directly sensed from at least one transmit chain may be leakage associated with transmitting at one or more ports or antennas of the device. The radar signals directly sensed from at least one transmit chain may be interference (sometimes referred to as self-interference (SI)) to sensing the reflection of the radar signal. As the transmit power increases, the SI power of the sensed radar signal increases. The sensitivity of the receive chain may be bounded by a maximum power level, at which the receive chain becomes saturated and therefore cannot successfully sense the signal. With one or more transmit chains co-located with the receive chain in the same device, the transmit power used for wireless communication with another device may be large enough to cause saturation in the receive chain when used to transmit radar signals. The transmit power of the radar signal may be specified by different devices in the wireless network. For example, a wireless network (e.g., a cellular network) may employ a radar server to define the RF signals (e.g., specific RS resources, time windows, or frequencies) to be used for the radar solution.The radar server may also define the transmit power of the RF signal for the radar solution. The radar server may be part of or accessible from a serving network or home network, or may simply be accessible via the Internet or via a local intranet.

[0021] An enhancement is desirable to measure power metrics that affect sensing and report the power metrics to a device that determines the transmit power for sensing. As described above, the transmit power of a radar signal affects sensing, and a different device (e.g., a radar server) may determine the transmit power. One or more power metrics measured by the sensing device may be useful to the radar server in determining the transmit power to be used for the radar.

[0022] Thus, an extension of determining a power metric and reporting the power metric to a radar server as described herein is described. In one implementation, a device in a wireless network may transmit a radar wireless signal over a wireless medium at a first wireless power from one or more transmit chains of the device. The device may be a base station (e.g., a gNodeB (gNB)) or a UE that transmits the radar signal, as determined by the radar server. The device may also sense the radar wireless signal over the wireless medium. The device may also generate a sensed headroom report (HR) based on sensing the radar wireless signal. Sensing the wireless signal may include one or more of directly sensing the wireless signal from at least one of the one or more transmit chains, sensing a reflection of the wireless signal on the wireless medium, or sensing noise on the wireless medium. The entire received signal has a total received power. The total received power may include an SI power of the wireless signal sensed directly from the at least one transmit chain, a first received power of a reflection of the wireless signal sensed on the wireless medium, and / or a noise power of the noise sensed on the wireless medium. The sensed HR may indicate a power headroom (PH) associated with sensing (PH indicates the difference between the actual power (e.g., SI power or transmit power) and the maximum power (e.g., the maximum SI power associated with a receive chain or the maximum transmit power associated with one or more transmit chains)). Also or alternatively, the sensed HR may indicate one or more combinations of SI power, total received power (also referred to as received power), or noise power. The device may also provide the sensed HR to a network entity in the wireless network. If the device is a base station (e.g., a gNB), the network entity may be a radar server or another component of the core network communicatively coupled to the radar server. If the device is a UE, the network entity may be a base station (e.g., a gNB) or a relay UE for providing the sensed HR to the base station or the radar server.A radar server of the wireless network may determine the transmit power to be used by the device to transmit the radar signal in response to sensing. Additionally or alternatively, one or more of a base station, a location server, or another network component (such as a core network component) may determine the transmit power or perform other operations described herein as being performed by the radar server. Some examples herein may refer exclusively to transmitting on a transmit chain and receiving on a receive chain for clarity in describing aspects of the disclosure. Transmitting on a transmit chain may refer to transmitting on one or more transmit chains. Also or alternatively, receiving on a receive chain may refer to receiving on one or more receive chains.

[0023] 1 illustrates an exemplary wireless communication system 100. The wireless communication system 100 (sometimes referred to as a wireless wide area network (WWAN) or wireless network) may include various base stations 102, sometimes referred to herein as gNBs 102 or other types of NBs, and various UEs 104. The exemplary wireless network may include a cellular network. The base stations 102 may include macrocell base stations (high-power cellular base stations) and / or small cell base stations (low-power cellular base stations). In one aspect, the macrocell base stations may include eNBs, where the wireless communication system 100 corresponds to an LTE network, or gNBs, where the wireless communication system 100 corresponds to a 5G network, or a combination of both, and the small cell base stations may include femtocells, picocells, microcells, etc.

[0024] The base stations 102 may collectively form a RAN and may interface with a core network 170 (e.g., Evolved Packet Core (EPC) or Next Generation Core (NGC)) through backhaul links 122 and with one or more radar servers 172 through the core network 170. In addition to other functions, the base stations 102 may perform functions related to one or more of forwarding user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, RAN sharing, Multimedia Broadcast Multicast Services (MBMS), subscriber and equipment tracking, RAN Information Management (RIM), paging, positioning, and distribution of alert messages. The base stations 102 may communicate with each other directly or indirectly (e.g., through EPC / NGC) via backhaul links 134, which may be wired or wireless.

[0025] The base stations 102 may communicate wirelessly with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. In one aspect, one or more cells may be supported by the base station 102 in each coverage area 110. A “cell” is a logical communication entity used for communication with a base station (e.g., over some frequency resources referred to as a carrier frequency, component carrier, carrier, band, etc.) and may be associated with an identifier (e.g., physical cell identifier (PCID), virtual cell identifier (VCID)) to distinguish between cells operating over the same or different carrier frequencies. In some cases, different cells may be configured according to different protocol types (e.g., machine type communication (MTC), narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for different types of UEs. In some cases, the term "cell" may also refer to the geographic coverage area (e.g., sector) of a base station, so long as the carrier frequency is detectable and usable for communication within some portion of the geographic coverage area 110.

[0026] The geographic coverage areas 110 of neighboring macrocell base stations 102 may partially overlap (e.g., within handover regions), but some of the geographic coverage areas 110 may be significantly overlapped by larger geographic coverage areas 110. For example, a small cell base station 102' may have a coverage area 110' that significantly overlaps with the coverage area 110 of one or more macrocell base stations 102. A network including both small cell base stations and macrocell base stations may be referred to as a heterogeneous network. A heterogeneous network may also include Home eNBs (HeNBs), which may serve restricted groups called Closed Subscriber Groups (CSGs).

[0027] The communication link 120 between the base station 102 and the UE 104 may include UL (also called reverse link) transmissions from the UE 104 to the base station 102, and / or downlink (DL) (also called forward link) transmissions from the base station 102 to the UE 104. The communication link 120 may use MIMO antenna techniques, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link 120 may be over one or more carrier frequencies. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​than UL).

[0028] The small cell base station 102' may operate in a licensed and / or unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell base station 102' may employ LTE or 5G technology and may use the same 5 GHz unlicensed frequency spectrum used by the WLAN AP 150. A small cell base station 102' employing LTE / 5G in the unlicensed frequency spectrum may extend coverage to and / or increase capacity of the access network. LTE in the unlicensed spectrum is sometimes referred to as LTE Unlicensed (LTE-U), Licensed Assisted Access (LAA), or MultiFire.

[0029] The wireless communication system 100 may further include a millimeter-wave (mmW) base station 180 that may operate within millimeter-wave (mmW) and / or sub-mmW frequencies in communication with the UE 182. Extremely high frequency (EHF) is the RF portion of the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz and has a wavelength between 1 and 10 millimeters. Radio waves in this band are sometimes referred to as millimeter waves. Sub-mmW may extend down to frequencies of 3 GHz with wavelengths of 100 millimeters. The very high frequency (SHF) band extends between 3 GHz and 30 GHz and is also referred to as centimeter waves. Communications using the mmW / sub-mmW radio frequency bands have high path loss and relatively short distances. The mmW base station 180 and the UE 182 may utilize beamforming (transmit and / or receive) over the mmW communication link 184 to compensate for the significant path loss and short distances. It will be appreciated that in alternative configurations, one or more base stations 102 may also transmit using mmW or sub-mmW and beamforming. Therefore, it will be appreciated that the above illustrations are illustrative only and should not be construed as limiting the various aspects disclosed herein.

[0030] Transmit beamforming is a technique for focusing an RF signal in a particular direction. Traditionally, when a network node (e.g., a base station) broadcasts an RF signal, it broadcasts that signal in all directions (omnidirectionally). With transmit beamforming, the network node determines where a given target device (e.g., a UE) is located (relative to the transmitting network node) and projects a stronger downlink RF signal in that particular direction, thereby providing a faster and more powerful RF signal (in terms of data rate) to the receiving device. To change the directionality of the RF signal when transmitting, the network node can control the phase and relative amplitude of the RF signal at each of one or more transmitters broadcasting the RF signal. For example, the network node may use an array of antennas (called a “phased array” or “antenna array”) that creates beams of RF waves that can be “steered” to point in different directions without actually moving the antennas. Specifically, RF current from the transmitter is supplied to the individual antennas with the proper phase relationship so that the radio waves from the separate antennas add together, enhancing radiation in the desired direction while canceling out radiation in undesired directions.

[0031] In receive beamforming, a receiver uses receive beams to amplify RF signals detected on a given channel. For example, the receiver can increase the gain setting and / or adjust the phase setting of an antenna array in a particular direction to amplify (e.g., increase the gain level of) RF signals received from that direction. Thus, when a receiver is said to beamform in a direction, it means that the beam gain in that direction is larger than the beam gains along other directions, or that the beam gain in that direction is the largest compared to the beam gains in that direction of all other receive beams available to the receiver. This results in a stronger received signal strength (e.g., reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), etc.) of RF signals received from that direction.

[0032] In 5G, the frequency spectrum in which wireless nodes (e.g., base station 102 / 180, UE 104 / 182) operate is divided into multiple frequency ranges: FR1 (450 MHz to 6000 MHz), FR2 (24250 MHz to 52600 MHz), FR3 (above 52600 MHz), and FR4 (between FR1 and FR2). In a multi-carrier system such as 5G, one of the carrier frequencies is called the “primary carrier” or “anchor carrier” or “primary serving cell” or “PCell,” and the remaining carrier frequencies are called “secondary carriers” or “secondary serving cells” or “SCells.” In carrier aggregation, the anchor carrier is the carrier operating on the primary frequency (e.g., FR1) utilized by the UE 104 / 182 and on the cell in which the UE 104 / 182 either performs an initial radio resource control (RRC) connection establishment procedure or initiates an RRC connection re-establishment procedure. The primary carrier carries all common control channels and UE-specific control channels. The secondary carrier is a carrier operating on a second frequency (e.g., FR2) that may be configured once an RRC connection is established between the UE 104 and the anchor carrier and may be used to provide additional radio resources. Because both the primary uplink carrier and the primary downlink carrier are typically UE-specific, the secondary carrier may contain only necessary signaling information and signals; e.g., UE-specific signaling information and signals may not be present in the secondary carrier. This means that different UEs 104 / 182 in a cell may have different downlink primary carriers. The same applies to the uplink primary carrier. The network can change the primary carrier of any UE 104 / 182 at any time. This is done, for example, to balance the load on different carriers.Since a "serving cell" (whether PCell or SCell) corresponds to a carrier frequency / component carrier over which several base stations are communicating, terms such as "cell", "serving cell", "component carrier", and "carrier frequency" can be used interchangeably.

[0033] For example, still referring to FIG. 1, one of the frequencies utilized by the macrocell base station 102 may be an anchor carrier (or "PCell"), and other frequencies utilized by the macrocell base station 102 and / or the mmW base station 180 may be secondary carriers ("SCells"). Simultaneous transmission and / or reception of multiple carriers allows the UE 104 / 182 to significantly increase its data transmission and / or reception rates. For example, two aggregated 20 MHz carriers in a multi-carrier system would theoretically lead to a two-fold increase in data rate (i.e., 40 MHz) compared to the data rate achieved by a single 20 MHz carrier.

[0034] The wireless communication system 100 may further include one or more UEs, such as the UE 164, that indirectly connect to one or more communication networks via one or more device-to-device (D2D) peer-to-peer (P2P) links. In the example of FIG. 1, the UE 164 has a D2D P2P link 192 with one of the UEs 104 connected to one of the base stations 102. The link 192 may be used to indirectly obtain cellular connectivity for D2D communication between the UEs 104 and 164 without using the base station 102. In some implementations, the link 192 is a sidelink (SL) between the UEs 104 and 164. In one example, the D2D P2P link 192 may be supported using any well-known D2D RAT, such as LTE Direct (LTE-D), WiFi Direct (WiFi-D), Bluetooth®, etc.

[0035] Wireless communications system 100 may include a UE 164, which may communicate with a macrocell base station 102 via communications link 120 and / or with an mmW base station 180 via an mmW communications link 184. For example, macrocell base station 102 may support a PCell and one or more SCells for UE 164, and mmW base station 180 may support one or more SCells for UE 164.

[0036] The radar server 172 may include one or more radar servers that will configure the wireless network to support ranging and object detection services based on radar technology. The radar server 172 determines which signal resources will be used for radar, and the radar server 172 indicates to the base station 102 (and, via the base station, to the UE) the signal resources to be used. As used herein, a signal resource may be any suitable frequency or time domain portion of a signal. A signal for radar may include any suitable reference signal (RS) or data signal. In some implementations, the radar server 172 determines one or more radar RS resources to include one or more of a DL Channel State Information RS (DL-CSI-RS), a DL Positioning Reference Signal (DL-PRS), which may be indicated by a location server coupled to the core network 170, a Synchronization Signal Block (SSB, each SSB is associated with a particular transmit beam of the base station transmitting the radar RS), a UE-to-UE SL-SSB (each SL-SSB is associated with a particular transmit beam of the UE transmitting the radar RS), a SL-CSI-RS, or a SL-PRS. Although various RS resources are described for a monostatic radar system, the signal may be any signal to be reflected by any object in the transmitting device's environment. The radar server 172 may also determine and indicate the transmit power to be used for the radar by the base station 102 or UE 104. Determining the transmit power may be based on one or more power metrics in one or more sensed HRs generated by the UE 104 or base station 102.

[0037] 2 shows a block diagram of a design 200 of a base station 102 and a UE 104, which may be one of the base stations and one of the UEs in FIG. 1. While design 200 shows communication between the base station 102 and the UE 104, the communication may be between two UEs 104 over an SL (such as a UE communicating with a relay UE), two base stations 102, or other devices in wireless network 100. With reference to design 200, the base station 102 may be equipped with T antennas 234a through 234t, and the UE 104 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1. For a monostatic radar system, the number of antennas may be greater than one.

[0038] At the base station 102, the transmit processor 220 may receive data for one or more UEs from a data source 212, may 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, may process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and may provide data symbols to all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.) and may provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs)) and synchronization signals (e.g., primary synchronization signals (PSSs) and secondary synchronization signals (SSSs)). The 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, etc.) 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. According to various aspects described in more detail below, synchronization signals can be generated using location coding to convey additional information.

[0039] At the UE 104, the antennas 252a through 252r may receive downlink signals from the base station 102 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) its received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 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 and provide decoded data for the UE 104 to a data sink 260 and may provide decoded control information and system information to the controller / processor 280. The channel processor may determine a reference signal received power (RSRP), a received signal strength indicator (RSSI), a reference signal received quality (RSRQ), a channel quality indicator (CQI), etc. In some aspects, one or more components of the UE 104 may be included within a housing.

[0040] On the uplink, at the UE 104, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, etc.) from a controller / processor 280. 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, and transmitted to the base station 102. At the base station 102, uplink signals from the UE 104 and other UEs may be received by antennas 234, processed by a 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 transmitted by the UE 104. 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 102 may include a communication unit 244 via which it may communicate with other devices (such as core network components).

[0041] The controller / processor 240 of the base station 102, the controller / processor 280 of the UE 104, and / or any other components of FIG. 2 may perform one or more techniques related to performing motion detection services, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 102, the controller / processor 280 of the UE 104, and / or any other components of FIG. 2 may perform or direct the operations of, for example, the illustrated and / or described processes and / or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the base station 102 and the UE 104, respectively. In some aspects, the memory 242 and / or the memory 282 may comprise a non-transitory computer-readable medium that stores one or more instructions for wireless communication. For example, the one or more instructions, when executed by one or more processors of the base station 102 and / or the UE 104, may perform or direct the operations of a process as described herein. The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink. In some implementations, the scheduler may be used by the UE 104 for data transmission on the sidelink.

[0042] As noted above, Figure 2 is provided as an example. Other examples may differ from those described with respect to Figure 2 (such as communications between two UEs or other types of devices in a wireless network or different types of wireless networks).

[0043] In the frequency domain for uplink, downlink, or sidelink transmission, the available bandwidth may be divided into uniformly spaced orthogonal subcarriers (also called "tones" or "bins"). For example, for a regular length cyclic prefix (CP) using 15 kHz spacing, the subcarriers may be grouped into groups of 12 subcarriers. A resource of one OFDM symbol length in the time domain and one subcarrier in the frequency domain is called a resource element (RE). Each grouping of 12 subcarriers and 14 OFDM symbols is called a resource block (RB), and in the above example, the number of subcarriers in a resource block is

[0044]

number

[0045] For a given channel bandwidth, the number of available resource blocks on each channel, also called the transmission bandwidth configuration, can be written as:

[0046]

number

[0047] For example, for a 3 MHz channel bandwidth in the example above, the number of available resource blocks on each channel is

[0048]

number

[0049] It should be noted that the frequency components of a resource block (e.g., 12 subcarriers) are called a physical resource block (PRB).

[0050] When specific resource elements are to be used for radar, the collection of resource elements used for radar may be referred to as “radar resources.” When the resource elements are from one or more reference signals, the collection of resource elements may be referred to as “radar RS resources.” A collection of resource elements may span multiple PRBs in the frequency domain and one or more symbols within or across a slot in the time domain. A base station or a UE may transmit radar resources at a transmit power for use in radar. For example, an indication of one or more radar resources to be used and the transmit power may be received at the communication unit 244 of the base station 102 from the radar server 172. In some implementations, the base station 102 may configure itself to transmit one or more radar resources via a downlink or any suitable frequency, time window, etc. that may be indicated by the radar server. In some implementations, the base station 102 may indicate one or more radar resources to one or more UEs 104, and the UEs 104 may transmit one or more radar resources via a sidelink or any suitable frequency, time window, etc. that may be indicated by the radar server.

[0051] 3 illustrates a UE 300, an example of a UE 104 capable of supporting radar in a wireless network (e.g., a cellular network). For example, the UE 300 may be configured to transmit and / or receive radar wireless signals, sense reflections of the radar wireless signals, measure one or more power metrics, and report the one or more power metrics in sensing HRs to a radar server 172 (e.g., via a base station or a relay UE). The UE 300 includes a computing platform including at least one processor 310, a memory 311 including software (SW) 312, one or more sensors 313, a transceiver interface 314 for a transceiver 315, a user interface 316, and a camera 318. The processor 310, memory 311, sensor 313, transceiver interface 314, user interface 316, and camera 318 may be communicatively coupled to each other by a bus 320 (e.g., which may be configured for optical and / or electrical communication). One or more of the illustrated devices (e.g., camera 318, one or more of sensors 313, etc.) may be omitted from UE 300, or UE 300 may include additional devices (e.g., a positioning system receiver (e.g., a Global Navigation Satellite System (GNSS) or Global Positioning System (GPS) receiver and processing components)) that are not shown. Processor 310 may include one or more intelligent hardware devices, e.g., a central processing unit (CPU), a microcontroller, an application specific integrated circuit (ASIC), etc. Processor 310 may comprise multiple processors, including an application processor 330, a digital signal processor (DSP) 331, a modem processor 332, a video processor 333, and / or a sensor processor 334. One or more of processors 330-334 may include multiple devices (e.g., multiple processors). For example, sensor processor 334 may include a processor for, e.g., radar, ultrasound, and / or lidar, etc.The modem processor 332 may support dual SIM / dual connectivity (and even more SIMs). For example, one SIM (Subscriber Identity Module or Subscriber Identification Module) may be used by an original equipment manufacturer (OEM) and another SIM may be used by an end user of the UE 300 for connectivity. The memory 311 is a non-transitory storage medium that may include random access memory (RAM), flash memory, disk memory, and / or read-only memory (ROM), etc. The memory 311 stores software 312, which may be processor-readable, processor-executable software code including instructions that, when executed, are configured to cause the processor 310 to operate as a special-purpose computer programmed to perform various functions described herein. Alternatively, the software 312 may not be directly executable by the processor 310 but may be configured, for example, when compiled and executed, to cause the processor 310 to operate as a special-purpose computer to perform various functions described herein. The description may refer only to the processor 310 performing a function, but this includes other implementations, such as when the processor 310 executes software and / or firmware. The description may refer to the processor 310 performing a function as shorthand for one or more of the processors 330-334 performing the function. The description may refer to the UE 300 performing a function as shorthand for one or more suitable components of the UE 300 performing the function. The processor 310 may include memory having stored instructions in addition to and / or in place of the memory 311. The functionality of the processor 310 is described more fully below.

[0052] 3 is an example of the present disclosure, including the claims, and other configurations may be used. For example, an exemplary configuration of a UE includes one or more of processors 330-334 of processor 310, memory 311, and wireless transceiver 340. Other exemplary configurations include one or more of processors 330-334 of processor 310, memory 311, and wireless transceiver 340, as well as one or more of sensors 313, user interface 316, camera 318, and / or wired transceiver 350.

[0053] The UE 300 may include a modem processor 332 that may be capable of performing baseband processing of signals received and downconverted by the transceiver 315. The modem processor 332 may perform baseband processing of the signals to be upconverted for transmission by the transceiver 315. Also or alternatively, the baseband processing may be performed by the processor 330 and / or the DSP 331, although other configurations may be used to perform the baseband processing.

[0054] The UE 300 may include sensors 313, which may include one or more of various types of sensors, such as, for example, one or more inertial sensors, one or more barometric pressure sensors, one or more magnetometers, one or more environmental sensors, one or more optical sensors, one or more weight sensors, and / or one or more radio frequency (RF) sensors. An inertial measurement unit (IMU) may comprise, for example, one or more accelerometers (e.g., collectively responsive to acceleration of the UE 300 in three dimensions) and / or one or more gyroscopes capable of detecting movement, including rotation, of the UE 300. The sensors 313 may include one or more magnetometers for determining orientation (e.g., relative to magnetic north and / or true north), which may be used for any of a variety of purposes, for example, to support one or more compass applications. The environmental sensors may include, for example, one or more temperature sensors, one or more barometric pressure sensors, one or more ambient light sensors, one or more camera imagers, and / or one or more microphones, etc. Sensors 313 may generate analog and / or digital signals, representations of which may be stored in memory 311 and processed by DSP 331 and / or processor 330 in support of one or more applications, such as, for example, applications directed to positioning and / or navigation operations.

[0055] The sensors 313 may be used in relative location measurement, relative location determination, motion determination, etc. Information detected by the sensors 313 may be used for motion detection, relative displacement, dead reckoning, sensor-based location determination, and / or sensor-assisted location determination. The IMU may be configured to provide measurements about the direction of motion and / or speed of motion of the UE 300, and the measurements may be used in relative location determination. For example, one or more accelerometers and / or one or more gyroscopes of the IMU may detect the linear acceleration and rotational velocity of the UE 300, respectively. The linear acceleration and rotational velocity measurements of the UE 300 may be integrated over time to determine the instantaneous direction of motion and displacement of the UE 300. The instantaneous direction of motion and displacement may be integrated to track the location of the UE 300. For example, a reference location of UE300 may be determined for a certain moment in time, and measurements from the accelerometer and gyroscope taken after this moment in time may be used in dead reckoning to determine the current location of UE300 based on the movement (direction and distance) of UE300 relative to the reference location.

[0056] The magnetometer may determine magnetic field strength in different directions, which may be used to determine an orientation of the UE 300. For example, the orientation may be used to provide a digital compass for the UE 300. The magnetometer may be a two-dimensional magnetometer configured to detect and provide an indication of magnetic field strength in two orthogonal dimensions. Alternatively, the magnetometer may be a three-dimensional magnetometer configured to detect and provide an indication of magnetic field strength in three orthogonal dimensions. The magnetometer may provide a means for sensing the magnetic field and providing an indication of the magnetic field, for example, to the processor 310.

[0057] The air pressure sensor may determine air pressure, which may be used to determine the UE 300's altitude within a building or current floor level. For example, differential pressure readings may be used to detect when the UE 300 changes floor levels, as well as the number of floors being changed. The air pressure sensor may provide a means for sensing air pressure and providing an indication of the air pressure, for example, to the processor 310.

[0058] The transceiver 315 may include a wireless transceiver 340 and a wired transceiver 350 configured to communicate with other devices over wireless and wired connections, respectively. For example, the wireless transceiver 340 may include a transmitter 342 and a receiver 344 coupled to one or more antennas 346 to transmit (e.g., on one or more uplink channels and / or one or more sidelink channels) and / or receive (e.g., on one or more downlink channels and / or one or more sidelink channels) wireless signals 348 and convert signals from the wireless signals 348 to wired (e.g., electrical and / or optical) signals and from the wired (e.g., electrical and / or optical) signals to the wireless signals 348. Thus, the transmitter 342 may include multiple transmitters, which may be separate or combined / integrated components, and / or the receiver 344 may include multiple receivers, which may be separate or combined / integrated components. The wireless transceiver 340 may be configured to communicate signals (e.g., with base stations and / or one or more other devices) according to various radio access technologies (RATs), such as 5G New Radio (NR), GSM (Global System for Mobile), UMTS (Universal Mobile Telecommunications System), AMPS (Advanced Mobile Phone System), CDMA (Code Division Multiple Access), WCDMA (Wideband CDMA), LTE (Long Term Evolution), LTE Direct (LTE-D), 6GPP LTE-V2X (PC5), IEEE 802.11 (including IEEE 802.11p), WiFi, WiFi Direct (WiFi-D), Bluetooth, Zigbee, etc. New Radio may use mm-wave and / or sub-6 GHz frequencies. The wired transceiver 350 may include a transmitter 352 and a receiver 354 configured for wired communication.The transmitter 352 may include multiple transmitters, which may be separate components or combined / integrated components, and / or the receiver 354 may include multiple receivers, which may be separate components or combined / integrated components. The wired transceiver 350 may be configured for optical and / or electrical communication, for example. The transceiver 315 may be communicatively coupled to the transceiver interface 314, for example, by an optical and / or electrical connection. The transceiver interface 314 may be at least partially integrated with the transceiver 315. In some implementations, the transceiver 315 does not include the wired transceiver 350.

[0059] The antenna 346 may include an antenna array, which may be capable of receive beamforming or transmit beamforming, for example, by increasing the gain setting and / or adjusting the phase setting of the antenna array in a particular direction to amplify (e.g., increase the gain level of) an RF signal received from or transmitted toward that direction. The antenna 346 may further include multiple antenna panels, each capable of beamforming. The antenna 346 may be adaptive, e.g., capable of selecting one or more antennas to control receiving a beam transmitted from a base station or another UE or transmitting a beam toward a base station or another UE. For example, to reduce power consumption, a reduced number of beams or a single beam may be selected, e.g., for receiving a wide beam, and an increased number of antennas in the antenna array may be selected when the transmit beam is relatively narrow. Conversely, the antenna 346 may be configured to transmit a wide beam or a relatively narrow beam.

[0060] The user interface 316 may comprise one or more of several devices, such as, for example, a speaker, a microphone, a display device, a vibrating device, a keyboard, a touchscreen, etc. The user interface 316 may include any two or more of these devices. The user interface 316 may be configured to allow a user to interact with one or more applications hosted by the UE 300. For example, the user interface 316 may store in the memory 311 representations of analog and / or digital signals to be processed by the DSP 331 and / or the processor 330 in response to actions from the user. Similarly, applications hosted on the UE 300 may store in the memory 311 representations of analog and / or digital signals to present output signals to the user. The user interface 316 may include audio input / output (I / O) devices, for example, comprising a speaker, a microphone, digital-to-analog circuitry, analog-to-digital circuitry, an amplifier, and / or gain control circuitry (including any two or more of these devices). Other configurations of audio I / O devices may be used. Also or alternatively, the user interface 316 may include one or more touch sensors that respond to contact and / or pressure, for example, on a keyboard and / or touchscreen of the user interface 316 .

[0061] The UE 300 may include a camera 318 for capturing still or video images. The camera 318 may comprise, for example, an imaging sensor (e.g., a charge-coupled device or CMOS imager), a lens, analog-to-digital circuitry, a frame buffer, etc. Additional processing, conditioning, encoding, and / or compression of signals representing the captured images may be performed by the general-purpose processor 330 and / or the DSP 331. Also or alternatively, conditioning, encoding, compression, and / or manipulation of signals representing the captured images may be performed by a video processor 333. The video processor 333 may decode / decompress stored image data, for example, for presentation on a display device (not shown) of the user interface 316.

[0062] The memory 311 may store software 312, including executable program code or software instructions that, when executed by the processor 310, may cause the processor 310 to operate as a special-purpose computer programmed to perform the functions disclosed herein. As illustrated, the memory 311 may include one or more components or modules that may be implemented by the processor 310 to perform the disclosed functions. While the components or modules are illustrated as software 312 in the memory 311 executable by the processor 310, it should be understood that the components or modules may be stored in another computer-readable medium or may be dedicated hardware either within or external to the processor 310. Several software modules and data tables may reside in the memory 311 and be utilized by the processor 310 to manage both the communications and functionality described herein. It should be appreciated that the organization of the contents of the memory 311 as illustrated is merely exemplary, and thus the functionality of the modules and / or data structures may be combined, separated, and / or structured in different ways depending on the implementation.

[0063] The memory 311 may include, for example, a radar session module 372 that, when implemented by one or more processors 310, configures the one or more processors 310 to participate in a monostatic radar session, e.g., transmitting a radar signal and sensing a reflection of the radar signal, as described herein. For example, the one or more processors 310 may be configured to participate in the radar session by performing one or more of: transmitting a radar wireless signal over a wireless medium at a first transmit power; directly sensing a radar wireless signal over the wireless medium from its own transmit chain; generating a sensed HR based on a received power during sensing of the radar wireless signal; or transmitting the sensed HR to a network entity in the wireless network. While the radar session module 372 is shown as being software contained within the memory 311, the radar session module 372 may be a hardware module, a software module, or a combination of hardware and software. For example, the module may include one or more application-specific integrated circuits (ASICs), executable code, or a combination of both.

[0064] FIG. 4 illustrates a base station 400, an example of a base station 102 capable of supporting radar services in a wireless network (such as wireless network 100). The base station 400 includes a computing platform including at least one processor 410, a memory 411 including software (SW) 412, and a transceiver 415. The processor 410, the memory 411, and the transceiver 415 may be communicatively coupled to each other by a bus 420 (which may be configured for optical and / or electrical communications, for example). One or more of the illustrated devices may be omitted from the base station 400, or the base station 400 may include one or more devices not illustrated. The processor 410 may include one or more intelligent hardware devices, such as a central processing unit (CPU), a microcontroller, an application-specific integrated circuit (ASIC), etc. The processor 410 may comprise multiple processors (e.g., including one or more of an application processor, a DSP, a modem processor, a video processor, and / or a sensor processor, similar to those illustrated in FIG. 3). Memory 411 is a non-transitory storage medium that may include random access memory (RAM), flash memory, disk memory, and / or read-only memory (ROM), etc. Memory 411 stores software 412, which may be processor-readable, processor-executable software code that includes instructions that, when executed, are configured to cause processor 410 to operate as a special-purpose computer programmed to perform various functions described herein. Alternatively, software 412 may not be directly executable by processor 410, but may be configured, for example, when compiled and executed, to cause processor 410 to operate as a special-purpose computer to perform various functions described herein. While the description may only refer to processor 410 performing functions, this includes other implementations, such as when processor 410 executes software and / or firmware.The description may refer to processor 410 performing a function as shorthand for one or more of the processors included therein performing the function. The description may refer to base station 400 performing a function as shorthand for one or more suitable components of base station 400 performing the function. Processor 410 may include memory having stored instructions in addition to and / or in place of memory 411. The functionality of processor 410 is described more fully below.

[0065] The transceiver 415 may include a wireless transceiver 440 and a wired transceiver 450 configured to communicate with other devices over wireless and wired connections, respectively. For example, the wireless transceiver 440 may include a transmitter 442 and a receiver 444 coupled to one or more antennas 446 to transmit and / or receive wireless signals 448 (e.g., on one or more uplink channels and / or one or more downlink channels) and convert signals from the wireless signals 448 to wired (e.g., electrical and / or optical) signals and from the wired (e.g., electrical and / or optical) signals to the wireless signals 448. The antenna 446 is one or more antenna arrays capable of beamforming and transmitting and receiving beams, including beams used in transmitting or receiving signals (including radar signals) to a radar service. Also, or alternatively, radar signals may be transmitted omnidirectionally. The transmitter 442 may include multiple transmitters, which may be separate components or combined / integrated components, and / or the receiver 444 may include multiple receivers, which may be separate components or combined / integrated components. The wireless transceiver 440 may be configured to communicate signals (e.g., with the UE 400, one or more other UEs, and / or one or more other devices) according to various radio access technologies (RATs), such as 5G New Radio (NR), GSM (Global System for Mobile), UMTS (Universal Mobile Telecommunications System), AMPS (Advanced Mobile Phone System), CDMA (Code Division Multiple Access), WCDMA (Wideband CDMA), LTE (Long Term Evolution), LTE Direct (LTE-D), 6GPP LTE-V2X (PC5), IEEE 802.11 (including IEEE 802.11p), WiFi, WiFi Direct (WiFi-D), Bluetooth, Zigbee, etc.Wired transceiver 450 may include a transmitter 452 and a receiver 454 configured for wired communication, e.g., to send communications to and receive communications from radar server 172. Transmitter 452 may include multiple transmitters, which may be separate components or combined / integrated components, and / or receiver 454 may include multiple receivers, which may be separate components or combined / integrated components. Wired transceiver 450 may be configured for optical and / or electrical communication, for example.

[0066] 4 is an example and not a limitation of the present disclosure, including the claims, and other configurations may be used. For example, the description herein describes the base station 400 as being configured to or performing certain functions, but one or more of these functions may be performed by the radar server 172 and / or the UE 300.

[0067] The memory 411 may store software 412, including executable program code or software instructions that, when executed by the processor 410, may cause the processor 410 to operate as a special-purpose computer programmed to perform the functions disclosed herein. As illustrated, the memory 411 may include one or more components or modules that may be implemented by the processor 410 to perform the disclosed functions. While the components or modules are illustrated as software 412 in the memory 411 executable by the processor 410, it should be understood that the components or modules may be stored in another computer-readable medium or may be dedicated hardware either within or external to the processor 410. Several software modules and data tables may reside in the memory 411 and be utilized by the processor 410 to manage both the communications and functionality described herein. It should be appreciated that the organization of the contents of the memory 411 as illustrated is merely exemplary, and thus the functionality of the modules and / or data structures may be combined, separated, and / or structured in different ways depending on the implementation.

[0068] The memory 411 may include a radar session module 472 that, for example, when implemented by the processor 410, configures the processor 410 to engage in a monostatic radar session or a multistatic radar session as described herein. For example, the one or more processors 410 may configure the base station 400 to indicate one or more radar resources (or other parameters of the radar wireless signal) to be used by one or more UEs 104 to transmit resources, to transmit radar wireless signals, to receive reflections of the radar wireless signals, to determine one or more power metrics based on the reflections, to generate sensed HRs including the one or more power metrics, to provide the sensed HRs to the radar server 172 (e.g., via one or more core network components), to obtain sensed HRs from UEs 104 performing radar services, or to relay obtained reports to the radar server 172. While the radar session module 472 is shown as being software contained within the memory 411, the radar session module 472 may be a hardware module, a software module, or a combination of hardware and software. For example, the module may include one or more application-specific integrated circuits (ASICs), executable code, or a combination of both.

[0069] A UE or a base station (e.g., a gNB) may perform radar services by transmitting radar wireless signals, may sense reflections of the radar wireless signals, and / or may determine the depth or motion of an object based on the reflections. A standalone monostatic radar system determines the phase offset between the transmitted radar signal and a received reflection of the radar signal. The phase offset (also called the phase difference) is related to the round-trip time (RTT) of the radar signal and indicates the depth of the object from the transmitter and receiver. Multiple depths over time indicate the motion state of the object (such as speed, velocity, or other suitable degree of motion).

[0070] 5 is a diagram 500 illustrating the transmission of radar signals and sensing of reflections by a device 502 for a monostatic radar solution. The device 502 may be a UE (such as UE 104 or 300), a base station (such as base station 102 or 400, which may be a gNB), another suitable device of a cellular network, or another suitable device of a different wireless network (such as a device in a WLAN). The device 502 includes a transmit chain 504 (which may include one or more transmit chains) coupled to an antenna 508 and a receive chain 506 (which may include one or more receive chains) coupled to an antenna 510. Each of the antennas 508 and 510 may be one or more antennas for wireless communication with another device. For example, the antennas 508 and 510 may be included in one or more antenna arrays (such as antenna 234 or antenna 252). Antenna 508 and antenna 510 are co-located on device 502, with antenna 508 configured to transmit radar signal 512 and antenna 510 configured to receive reflection 516 of radar signal 512 (reflected by object 514).

[0071] The wireless transceiver of the device 502 includes a transmit chain 504 and a receive chain 506. For example, the transmit chain 504 may be included in the transmitter 342 of the wireless transceiver 340 of the UE 300, or the transmit chain 504 may be included in the transmitter 442 of the wireless transceiver 440 of the base station 400. FIG. 5 shows a simplified version of a single transmit chain and a single receive chain for clarity, but any number of transmit chains and receive chains may be present in the device. The transmit chain 504 (which may include one or more transmit chains) may include a digital-to-analog converter (such as the modulator 232) for converting a digital sequence to an analog signal and a front end for transmitting the analog signal in a radar wireless signal 512 via the antenna 508. The receive chain 506 (which may include one or more receive chains) may include a front end for sensing reflections 516 via the antenna 510 and an analog-to-digital converter (such as the demodulator 254) for converting the received analog signal to a digital sequence. The timing of the transmitted digital sequence may be compared to the timing of the received digital sequence to determine the phase difference in determining the RTT. The RTT may be used to determine the distance of the object 514 from the device 502.

[0072] During sensing, the receive chain 506 may receive the radar signal directly from the transmit chain 504 (shown as signal 518). For example, the antenna 508 may include leakage, such that the co-located antenna 510 receives the radar signal directly from the antenna 508. While the signal 518 is shown as being received over a wireless medium for clarity, the signal 518 may be received through other media (such as within the device itself or along a physical medium that provides leakage (e.g., the device housing)). Thus, directly receiving the signal 518 from at least one transmit chain may refer to receiving the signal over a wireless medium or through another suitable medium. The directly received radar signal 518 acts as interference to sensing the reflection 516 and may be referred to as self-interference (SI). Receiving the reflection 516 by the receive chain 506 may also be associated with noise, which may include ambient noise or interference in the environment (including other wireless signals at the same or adjacent frequencies as the radar signal). In this manner, the total signal received by the receive chain 506 includes the reflection 516, the signal 518, and noise. The received power at the antenna 510 corresponds to the total signal. The received power may include the power of the received reflection 516, the SI power of the received signal 518, and noise power. While FIG. 5 shows leakage and transmission associated with one transmit chain, the radar signal may be transmitted over one or more transmit chains. In this manner, the directly received radar signal may be from at least one of the one or more transmit chains. In some cases, the reflection 516 and the direct radar signal 518 may originate from the same transmit chain. In some other cases, the reflection 516 and the direct radar signal 518 may originate from different transmit chains. Thus, as used herein, transmitting in a transmit chain may refer to transmitting in one or more transmit chains, and receiving directly from a transmit chain may refer to receiving directly from at least one of the transmitting one or more transmit chains.

[0073] When the device 502 transmits a signal to another device during wireless communication, SI may not be an issue because the device 502 is not receiving the transmitted signal. The device 502 may increase its transmit power to increase the received signal strength (RSS) at the receiving device. The transmit power may be increased up to a maximum transmit power, which may be based on hardware limitations or limitations imposed by one or more standards. With respect to radar, if the device 502 is transmitting a radar signal 512, increasing the transmit power increases the power of the signal 512 and reflections 516, but increasing the transmit power also increases the power of the signal 518 (referred to as SI power). The receive chain 506 may be able to sense a signal within a certain range of receive power (such as less than the maximum receive power). If the receive power is greater than that range, the receive chain 506 becomes saturated and is unable to recover the digital sequence from the received signal. If the transmit power is too high, the SI power may cause the receive power to exceed that range. Also or alternatively, increasing the transmit power may increase the SI power more than the power of the reflection 516. If the SI power is too close to the power of the reflection, the receive chain 506 may not be able to distinguish the reflection 516 from the signal 518.

[0074] In some implementations, the device 502 may determine a transmit power to be used when sensing radar signals that is different from the transmit power for wireless communications, may measure one or more power metrics related to sensing the radar signals, and may report the one or more power metrics in a sensing HR (which may be provided to the radar server 172 or another device). The one or more power metrics may be used to determine a transmit power that improves sensing of the radar signals, and determining the transmit power to be used to sense the radar signals is based on improving sensing for the radar (which may be different from simply increasing the transmit power to improve reception at a different device).

[0075] Power headroom (PH) for wireless communications is specified in the 3GPP standard set for 5G NR. The PH value specified in the 3GPP standard set is an indication of the difference between a UE's current transmit power and its maximum transmit power. The UE may report PH information to a gNB in ​​a PH Report (PHR) Medium Access Control Layer (MAC) Control Element (MAC CE) transmitted over a physical layer (PHY) uplink shared channel (PUSCH). The PH information includes a maximum transmit power value and a PH value for each of the UE's serving cells configured for the uplink. The gNB may use the PH value from the received PHR to determine how to schedule transmissions to and from the UE. The IEEE 802.11 standard set defines a station headroom value as the difference between the station's maximum transmit power and its actual transmit power, and the station may report the station headroom value to the access point.

[0076] Referring back to the PH defined in the 3GPP standards set for 5G NR, a UE transmitting at a transmit power less than the maximum transmit power has a positive PH value of maximum transmit power - actual transmit power. The resulting PHR may be referred to as a positive report. In some cases, the maximum transmit power may be related to the maximum transmit power to be used or otherwise indicated in the wireless network, but the UE may be able to transmit at a power greater than the maximum power. In this way, the UE's actual transmit power may be greater than the maximum transmit power, and the UE has a negative PH value of maximum transmit power - actual transmit power. The resulting PHR may be referred to as a negative report.

[0077] A device, such as a UE or a base station, may be configured to generate a sensed HR. The sensed HR is a similar concept to the PHR, but the metrics to be measured and reported are different from the PH information contained in the PHR. The sensed HR may be used in determining transmit power, scheduling radar use for the device, or otherwise managing the device to support radar.

[0078] 6 shows a flowchart for an example method 600 for generating a sensed HR in a wireless network. The example method 600 may be performed by any suitable device 502 of a wireless network, such as a base station 102 or 400 shown in FIGS. 1 and 4 or a UE 104 or 300 shown in FIGS. 1 and 3 in a wireless network (e.g., a cellular network), in a manner consistent with the disclosed implementations. For example, a device that may perform one or more operations in method 600 (or any of the other described methods, such as method 700 in FIG. 7 or method 800 in FIG. 8) may include at least one transceiver (e.g., one or more wireless transceivers and / or one or more wired transceivers), at least one memory, and at least one processor coupled to the at least one transceiver and the at least one memory. Referring to UE 300 as an exemplary device, the at least one transceiver may include transceiver 315 or wireless transceiver 340, the at least one memory may include memory 311, and the at least one processor may include processor 310 or one or more of processors 330-334. Referring to base station 400 as an exemplary device, the at least one transceiver may include transceiver 415 or wireless transceiver 440, the at least one memory may include memory 411, and the at least one processor may include processor 410.

[0079] In block 602, the device 502 transmits a radar wireless signal over a wireless medium from one or more transmit chains of the first device at a first transmit power. The means for transmitting the radar wireless signal may include at least one transceiver (such as a wireless transceiver) of the device. For example, the wireless transceiver of the device 502 includes a transmit chain 504 for converting a digital sequence and generating an analog signal that is transmitted using an antenna 508.

[0080] In block 604, the device 502 senses a radar wireless signal. The means for sensing the radar wireless signal may include at least one transceiver (such as a wireless transceiver) of the device. Sensing the radar wireless signal may include one or more of directly sensing the wireless signal from at least one of the one or more transmit chains, sensing one or more reflections of the wireless signal on the wireless medium, or sensing noise on the wireless medium (described below with reference to FIG. 7).

[0081] FIG. 7 shows a flowchart for an example method 700 for generating a sensed HR in a wireless network. The example method 700 may be an example implementation of block 604 in FIG. 6. The example method 700 may be performed by any suitable device 502 of a wireless network (e.g., a cellular network), such as a base station 102 or 400 shown in FIGS. 1 and 4 or a UE 104 or 300 shown in FIGS. 1 and 3, in a manner consistent with the disclosed implementations. Although all blocks 702-706 are illustrated as being performed by a device, the device may perform only a portion of blocks 702-706 or multiple instances of one or more of blocks 702-706. In this manner, the entire signal sensed by the device may include one or more of a radar wireless signal sensed directly from at least one transmit chain of the device, reflections of the radar wireless signal sensed on the wireless medium, or noise on the wireless medium.

[0082] In block 702, the device 502 directly senses a radar wireless signal from at least one transmit chain of the device 502. The measured SI power corresponds to the radar wireless signal directly sensed from the at least one transmit chain. For example, the entire signal sensed by the device 502 includes a total received power. The entire sensed signal may include the radar wireless signal sensed from the at least one transmit chain of the device 502, and the total received power includes the SI power corresponding to the radar wireless signal directly sensed from the at least one transmit chain of the device 502. The means for directly sensing the radar wireless signal from the at least one transmit chain may include at least one transceiver (such as a wireless transceiver) of the device. For example, the receive chain 506 may directly sense the radar wireless signal from the transmit chain 504 and / or another transmit chain of the device 502 that transmits the radar wireless signal. The antenna 508 (which may include one or more antennas) that transmits the radar wireless signal may be associated with transmit leakage, and the leaked signal may be received at the antenna 510 (which may include one or more antennas) used for sensing. The wireless transceiver of the device 502 may include a receive chain 506 (which may include one or more receive chains) for directly sensing the radar wireless signal from the transmit chain 504 (and / or another transmit chain) while listening for reflections of the radar wireless signal.

[0083] In block 704, the device 502 senses reflections of the radar wireless signal on the wireless medium. The measured first received power corresponds to a reflection of the radar wireless signal sensed on the wireless medium. For example, as described above, the entire signal sensed by the device 502 includes a total received power. The entire sensed signal may include reflections of the radar wireless signal, and the total received power includes a total received power corresponding to reflections of the radar wireless signal sensed on the wireless medium. The means for sensing reflections of the radar wireless signal on the wireless medium may include at least one transceiver (such as a wireless transceiver) of the device. For example, the receive chain 506 may sense reflections of the radar wireless signal. Objects in the device's environment may reflect radar wireless signals transmitted by the device, and such reflections may be sensed by the device. The wireless transceiver of the device 502 may include a receive chain 506 (which may include one or more receive chains) for sensing reflections of the radar wireless signal.

[0084] In block 706, the device 502 senses noise on the wireless medium. The measured noise power corresponds to the noise sensed on the wireless medium. For example, as described above, the entire signal sensed by the device 502 includes a total received power. The entire sensed signal may include noise on the wireless medium, and the total received power includes a noise power corresponding to the noise sensed on the wireless medium. The means for sensing noise on the wireless medium may include at least one transceiver (such as a wireless transceiver) of the device. For example, the receive chain 506 may sense the noise. The noise may include signals or other energy on the wireless medium that does not correspond to leakage or reflections of transmissions from the device. The wireless transceiver of the device 502 may include a receive chain 506 (which may include one or more receive chains) for sensing noise.

[0085] Referring again to FIG. 6 , in block 606, the device 502 generates a sensed HR based on sensing the radar wireless signal. The means for generating the sensed HR may include at least one processor of the device. As described above, the received power may include the SI power of the radar wireless signal sensed directly from at least one transmit chain. The received power may also or alternatively include the first received power of the reflection and / or the power of any other reflections sensed on the wireless medium. The received power may also or alternatively include the noise power of the noise sensed on the wireless medium. One or more of the above-mentioned powers (such as the SI power, the received power / received power, or the noise power) of the entire sensed signal may be measured by the device. The sensed HR may indicate one or more power metrics related to the power measured by the device 502. For example, at least a portion of the one or more power metrics may be based on the SI power.

[0086] In block 608, the device 502 provides the sensed HR to a network entity in a wireless network. The means for providing the sensed HR to the network entity may include at least one transceiver (e.g., a wireless transceiver) of the device. If the device 502 is a UE 104, the network entity may be a base station 102 (e.g., a gNB) or a relay UE 104. If the sensed HR is to be provided to a base station serving the device 502, the UE 104 may provide the sensed HR to the base station (e.g., via a wireless transceiver) in an uplink MAC-CE on the NR-Uu interface (as specified by the 3GPP standards set for 5G NR). Also or alternatively, any other suitable uplink resources may be used in providing the sensed HR. If the sensed HR is to be provided to a relay UE, the UE 104 may provide the sensed HR to the relay UE (e.g., via a wireless transceiver) in an NR-based sidelink MAC-CE (e.g., via a PC5 interface to the relay UE). Also or alternatively, any other suitable sidelink resources may be used when providing the sensed HR. In some implementations, the device 502 may unicast (e.g., via a wireless transceiver) the sensed HR to a second device (such as a base station or a relay UE). Also or alternatively, the device 502 may broadcast or groupcast (e.g., via a wireless transceiver) the sensed HR to the second device. If the sensed HR is provided to a relay UE, the relay UE may relay the sensed HR to a base station (e.g., via an uplink MAC-CE) or to another relay UE until it is provided to the base station, which may provide the sensed HR to the radar server 172 or a core network component communicatively coupled to the radar server 172. If the device 502 is a base station 102 (e.g., a gNB), the network entity may be the radar server 172 or a core network component communicatively coupled to the radar server 172.

[0087] Providing a sensed HR may be trigger-based. In this manner, the device 502 does not provide a sensed HR to a second device (such as a base station or a relay UE) until the device 502 receives a trigger to provide the sensed HR. In some implementations, the device 502 may obtain a trigger in downlink control information (DCI) on the NR-Uu interface to a base station serving the device 502, and the device 502 may provide the sensed HR to the base station in response to obtaining the trigger. In some implementations, the device 502 may obtain a trigger in sidelink control information (SCI) on an NR-based sidelink to a relay UE, and the device 502 may provide the sensed HR to the base station in response to obtaining the trigger. The trigger may be based on a request from a radar server of the wireless network. For example, the radar server 172 may determine that radar information associated with the UE 104 is out of date or may otherwise determine that the UE 104 should be requested to provide a sensed HR. The request may be provided to the core network 170, and the trigger may be generated and provided by the base station 102 (e.g., a gNB) towards the UE 104. In addition to or as an alternative to providing the sensed HR being trigger-based, the device 502 may provide the sensed HR to a network entity periodically, the periodicity of which may be determined by the device 502, the network entity, the radar server 172, or any other suitable component.

[0088] The sensed HR may be provided to the radar server 172, which may determine, based on the sensed HR, a transmit power to be used by the device to transmit a radar wireless signal. The device 502 may obtain a request by the radar server to adjust its current transmit power for sensing, using an adjustment value based on the sensed HR previously provided by the device 502. For example, the device 502 may be requested to increase its transmit power for sensing.

[0089] Referring back to generating the sensed HR at block 606, the device 502 may determine one or more power metrics and may indicate the one or more power metrics in the sensed HR. An example power metric may include a sensed headroom (where the sensed HR includes an indication of the sensed headroom). The device 502 may associate a maximum SI power for sensing. For example, the maximum SI power may indicate the maximum SI power at which the device 502 can successfully sense a reflection of a radar signal and recover a digital sequence from the reflection. The sensed headroom is the difference between the SI power of the radar signal directly received from at least one transmit chain and the maximum SI power (e.g., maximum SI power - actual SI power). The device 502 may determine the SI power and compare the SI power to the maximum SI power to determine the sensed headroom. Determining the SI power may be performed in any suitable manner. For example, as described above, the received power may include the SI power, the power of the received reflection, and the power of noise. The noise power may be determined by sampling the received power without transmitting. The device 502 may sample the received power upon transmitting a radar signal and before sensing a reflection of the radar signal. In this manner, the received power may include SI power and noise power. The device 502 may subtract the determined noise power from the received power to determine the SI power. Also or alternatively, the device 502 may determine the SI power based on a variation in the received power associated with a digital sequence. A signal from at least one direct transmit chain may be received before one or more reflections, and the entire received signal may include at least two instances of radar signal offset based on timing differences (each instance based on the same digital sequence, with the first instance associated with the SI and the second instance more associated with the received reflection). The device 502 may process the entire signal to determine the first instance of the radar signal and determine the SI power. Similar to the concept of positive and negative PH values ​​for wireless communications described above, if the maximum SI power is greater than the determined SI power, the sensed headroom may be positive.If the maximum SI power is less than the determined SI power, the sensed headroom may be negative.

[0090] In some implementations, the sensed HR may include an indication of one or more of SI power minus noise, received power minus SI power minus noise, or received power minus noise. In some implementations, the sensed HR may include an indication of PH for sensing (also referred to as sensed PH). The sensed PH may be the difference between the maximum transmit power for sensing and the desired transmit power for sensing. In some implementations, the maximum transmit power for sensing may be based on hardware limitations, software-implemented constraints on transmit power, the desired maximum transmit power for the wireless network, standards considerations, or a combination of the above. For example, the maximum transmit power for sensing may be defined in firmware or otherwise set to limit the transmit power of the radar signal. As mentioned above, the maximum transmit power for sensing may differ from the maximum transmit power for wireless communication.

[0091] In some implementations, the desired transmit power may be a sensing transmit power determined by the device 502. As described above, the determined transmit power may be greater than a configured maximum transmit power for the device. Alternatively, the determined transmit power may be less than or equal to the maximum transmit power (in which case the device 502 may transmit a radar signal at the desired transmit power). In some implementations, the desired transmit power may be a requested transmit power (such as from the radar server 172, which indicates a desired transmit power for the device). The device 502 may receive an indication of the requested transmit power from the radar server 172 if the device is a base station, or from a base station or relay UE if the device is a UE 104. When the sensing maximum transmit power is greater than the desired transmit power, the sensed PH may be positive, and when the sensing maximum transmit power is less than the desired transmit power, the sensed PH may be negative.

[0092] Although several example power metrics are described above, the sensed HR may include any other suitable power metric that may be used in determining transmit power or otherwise managing the device 502 that supports radar.

[0093] In some implementations, generating a sensed HR may be based on one or more parameters used to determine when a sensed HR will be generated. For example, the device 502 may generate a sensed HR for each attempt to sense a reflection of a transmitted radar signal, whether successful or unsuccessful. An exemplary parameter may include that a sensing attempt was made. In another example, the device 502 may generate a sensed HR for each successful attempt to sense a reflection of a transmitted radar signal. An exemplary parameter may include that a successful sensing attempt was made. Other parameters may be the periodicity with which the radar runs, a particular time window during which the radar will run, or a particular frequency (such as a particular band or sub-band) at which the radar will run.

[0094] The sensed HR may be in various formats. In some implementations, one or more parameters may indicate the format of the sensed HR. The sensed HR may include an indication of one or more power metrics determined by the device 502. In one implementation, the sensed HR may include one or more power metrics from a single sensing attempt. In another implementation, the sensed HR may be an integrated report including power metrics across multiple sensing attempts. The multiple sensing attempts may be at the same transmission frequency or across different transmission frequencies. If at the same frequency, the multiple sensing attempts are over time. If at different frequencies, the multiple sensing attempts may be over time or in parallel. In an example where the integrated report is for multiple sensing attempts across frequencies, the sensed HR may include a sub-band sensed HR that integrates power metrics from the multiple sensing attempts across different sub-bands.

[0095] In one format of the sensed HR, the sensed HR may include a sensed PH value or a sensed headroom value as determined by the device 502. Another format of the sensed HR may be that the value indicated by the sensed HR is a difference from a PH value for the wireless communication indicated in the power HR for the wireless communication. For example, the device 502 may generate a power HR for the wireless communication by a UE (as defined in the 3GPP standards set for 5G NR), and the device 502 may provide the power HR to a network entity (e.g., a gNB or a relay UE), where the power HR indicates a first power measurement associated with the communication on the wireless medium. The device 502 may determine a sensed headroom, a sensed PH, or other second power measurement associated with sensing on the wireless medium. The differential sensed HR may indicate a difference between the first power measurement and the second power measurement from the power HR. For example, the differential sensed HR may indicate a PH-sensed PH or a -sensed headroom associated with the wireless communication. The one or more parameters for generating the sensed HR may indicate a format of the sensed HR to be generated. Other exemplary parameters are the transmit power to be used or the power metric to be indicated in the sensed HR.

[0096] The one or more parameters may be stored in the device 502 and may be used in generating the sensed HR. At least a portion of the parameters or adjustments to the parameters may be indicated to the device 502. For example, the radar server 172 may determine a format of the sensed HR to be received and the format may be indicated to the device 502. An indication of the one or more parameters may be obtained by the device 502, and the device 502 may configure the one or more parameters at the device 502 based on the indication. In this manner, the sensed HR may be updated periodically. In some implementations, the indication is obtained in a MAC-CE on an NR-Uu interface to a gNB serving the device 502 or on an NR-based sidelink between the device 502 and a relay UE. The device 502 may configure the one or more parameters, and one or more sensed HRs may be generated based on the configured one or more parameters. In some implementations, the configuration of one or more parameters persists (e.g., for one or more sensed HRs) until another indication of the one or more parameters is obtained by the device 502. For example, the radar server 172 may later determine that the format, periodicity, etc. of the sensed HRs to be received should be adjusted, and the adjustment value may be indicated to the device 502. In some implementations, an indication of the one or more parameters may be obtained periodically by the device 502. For example, the device 502 may periodically receive the indication in one or more of a Radio Resource Control (RRC) message from a gNB serving the device 502, an LTE Positioning Protocol (LPP) message from a gNB serving the device 502, or a message on an NR-based sidelink.

[0097] The device 502 may determine or adjust the transmit power to be used to transmit the radar wireless signal to improve detection of the reflection (which may improve the ability to determine the distance of an object from the device 502).

[0098] FIG. 8 shows a flowchart for an example method 800 for determining a final transmit power for transmitting a radar wireless signal. The final transmit power may be a minimum or a transmit power reduced from other transmit powers at which the device 502 can successfully sense a reflection of the radar wireless signal transmitted at the final transmit power. Successfully sensing a reflection may refer to the device 502 being able to recover the digital sequence sufficiently to determine the distance of an object, the RTT of the signal, etc. based on the reflection. The example method 800 may be performed by any suitable device 502 of a wireless network (e.g., a cellular network), such as the base station 102 or 400 shown in FIGS. 1 and 4 or the UE 104 or 300 shown in FIGS. 1 and 3 in a wireless network, in a manner consistent with disclosed implementations. For example, a device that may perform one or more operations in method 800 may include at least one transceiver (e.g., one or more wireless transceivers and / or one or more wired transceivers), at least one memory, and at least one processor coupled to the at least one transceiver and the at least one memory. Referring to UE 300 as an exemplary device, the at least one transceiver may include transceiver 315 or wireless transceiver 340, the at least one memory may include memory 311, and the at least one processor may include processor 310 or one or more of processors 330-334. Referring to base station 400 as an exemplary device, the at least one transceiver may include transceiver 415 or wireless transceiver 440, the at least one memory may include memory 411, and the at least one processor may include processor 410.

[0099] In block 802, the device 502 sets a transmit power for transmitting a radar wireless signal to an initial transmit power. The means for setting the transmit power may include at least one transceiver (e.g., a wireless transceiver) of the device, at least one processor, or a combination of both. The initial transmit power may be a minimum transmit power or any other suitable transmit power to be used for sensing. The initial transmit power may be defined in software or firmware, may be based on hardware limitations, or may otherwise be predetermined for the device 502.

[0100] In block 804, the device 502 transmits a radar wireless signal at its transmit power. The means for transmitting the radar wireless signal may include at least one transceiver (e.g., a wireless transceiver) of the device. Transmitting the radar wireless signal in block 804 may be similar to block 602 in FIG. 6.

[0101] At block 806, the device 502 attempts to sense a reflection of the radar wireless signal. The means for attempting to sense a reflection of the radar wireless signal may include at least one transceiver (e.g., a wireless transceiver) of the device.

[0102] At decision block 808, if the reflection is successfully sensed, the process continues at block 810. If the reflection is not successfully sensed, the process continues at decision block 812. The means for determining whether the reflection is successfully sensed may include at least one processor of the device.

[0103] At block 810, the device 502 determines the current transmit power as the final transmit power to be used to transmit the radar wireless signal. The means for determining the current transmit power as the final transmit power may include at least one processor of the device. As described above, the final transmit power may be the minimum transmit power at which the device 502 can successfully sense a reflection of a radar wireless signal transmitted at the final transmit power.

[0104] At decision block 812, the device 502 determines whether a maximum number of repetitions for transmitting a radar wireless signal at the same transmit power has been reached. Means for determining whether a maximum number of repetitions for transmitting a radar wireless signal has been reached may include at least one processor of the device. The maximum number of repetitions may be any integer greater than or equal to one. For example, a reflection of one transmit instance of a radar wireless signal may be prevented from being sensed and successfully recovered due to temporary interference. If the device 502 is unable to sense a reflection of the radar wireless signal from the first transmit instance, the device 502 may repeat transmitting the radar wireless signal until the device 502 successfully senses a reflection of the radar wireless signal or the maximum number of repetitions has been reached. If the maximum number of repetitions has not yet been reached, the process returns back to block 804, where the device 502 retransmits the radar wireless signal at the transmit power and attempts to sense a reflection of the radar wireless signal. If the maximum number of repetitions has been reached, the device 502 determines that one or more sensing attempts at the same transmit power have failed, and the process continues at decision block 814. The maximum number of iterations may be a trade-off between time and power resources for attempting to sense a radar signal at the same transmit power before increasing the transmit power. The maximum number of iterations may be one of the parameters related to sensing a radar signal. The maximum number of iterations may be specified by the radar server 172, by another component of the wireless network, at the device 502, or may be determined in any suitable manner. In some implementations, the device 502 uses a transmission counter to track the number of transmissions at the same transmit power. The device 502 may determine whether the maximum number of iterations has been reached by comparing the transmission counter to the maximum number.

[0105] At decision block 814, the device 502 determines whether the maximum transmit power for sensing has been reached. Means for determining whether the maximum transmit power for sensing has been reached may include at least one processor of the device. For example, if the current transmit power is equal to the maximum transmit power for sensing, the device 502 may not increase the current transmit power. In this manner, the example method 800 may end. In some implementations, the device 502 may indicate to a network entity that sensing has failed or that the device 502 has temporarily terminated, suspended, or delayed attempts to transmit radar signals and sense radar signal reflections. If the power is increased in discrete steps (sometimes referred to as power ramping steps), the device 502 may determine whether the maximum transmit power for sensing is equal to the current transmit power by comparing the number of steps by which the transmit power is increased from the initial transmit power to the total number of steps to reach the maximum transmit power for sensing. For example, the device 502 may use a power ramping counter to count the number of power ramping steps, and the device 502 may compare the power ramping counter to a defined maximum number of power ramping steps stored in the device 502. If the power ramping counter value is equal to the maximum number, the maximum transmit power has been reached. If the power ramping counter value is less than the maximum number, the maximum transmit power has not been reached. In another implementation, the device 502 may compare the current transmit power to the determined maximum transmit power.

[0106] At block 816, the device 502 increases the transmit power. The means for increasing the transmit power may include one or more of the at least one transceiver of the device or at least one processor. For example, the device 502 may increase the transmit power by a power ramping step (at block 818). The power ramping step may be any suitable discrete step in increasing the transmit power. The steps may be evenly spaced, may be decreased as the maximum transmit power for sensing is approached, or may be spaced in any other suitable manner. The device 502 may also use any number of steps between the initial transmit power and the maximum transmit power. The number of steps to be used may be a trade-off between fidelity in determining the final transmit power (more steps increase fidelity in adjusting the final transmit power) and processing resources and time (more steps require additional transmission and processing by the device 502, which takes more time). When the transmit power is increased by a power ramping step, a power ramping counter value may be incremented. After increasing the transmit power (at block 816), the process returns to block 804, where the device 502 transmits the radar wireless signal at the increased transmit power. If a transmit counter is used to count transmissions at the same transmit power, the transmit counter may be reset.

[0107] When device 502 performs method 800, device 502 may recursively increase the transmit power based on one or more failed sensing attempts, may transmit the radar wireless signal one or more times at the increased transmit power, and may attempt to sense a reflection of the radar wireless signal until the first device successfully senses a reflection of the radar wireless signal (otherwise, the transmit power cannot be increased any further). The increased transmit power used for the successful sensing attempt is the final transmit power for sensing.

[0108] In some implementations, the device 502 may constrain sensing attempts to a maximum number of transmissions to be performed before determining or indicating that sensing has failed. The maximum number of transmissions may be at one transmit power or across multiple transmit powers. For example, although not shown in FIG. 8 , the device 502 (e.g., at least one processor of the device) may count the total number of sensing attempts across different transmit powers used and compare that total to the maximum number of transmissions. If that total number equals the maximum number of transmissions, the device 502 may determine that sensing will be temporarily terminated, suspended, or delayed. The maximum number of transmissions may be a trade-off between processing resources / time and successfully sensing reflections to determine an object's distance, RTT, or another metric.

[0109] The one or more device parameters for determining the final transmit power may include one or more of the maximum number of transmissions for sensing before determining or indicating that sensing has failed, a power ramping step to be used to increase the transmit power for sensing, a transmission counter for sensing, an initial transmit power for sensing, or a maximum number of iterations at the same transmit power for sensing. The sensing HR may be related to or indicative of any of the one or more device parameters for determining the final transmit power. For example, the sensing HR may include an indication of one or more of the initial transmit power, the power ramping step, the maximum number of transmissions at the same transmit power, or the overall maximum number of transmissions to be performed before the device 502 will determine that sensing has failed. If the final transmit power cannot be determined, the sensing HR may indicate an error, i.e., that sensing has failed. In some implementations, one or more of the device parameters may be indicated to the device 502 (e.g., from the radar server 172), and the device 502 may adjust the one or more device parameters to determine the final transmit power.

[0110] The device 502 may generate and provide one or more sensed HRs while performing the operations of method 800. For example, the device 502 may generate one or more sensed HRs for one or more failed sensing attempts and may provide the one or more sensed HRs to a network entity (such as a gNB, a relay UE, or a radar server). The one or more sensed HRs for the one or more failed sensing attempts may include an indication of one or more of a transmit power, a transmit counter, or a power ramping counter. The one or more sensed HRs may be used by the radar server or another device to determine one or more of the device parameters for adjusting method 800. For example, if sensing at the initial transmit power continues to fail, the radar server may indicate an increase in the initial transmit power.

[0111] As described above, various implementations exist for a device to generate a sensed HR, determine a final transmit power for transmitting a radar signal, and otherwise perform one or more radar operations. References throughout this specification to "one example," "an example," "some examples," or "exemplary implementations" mean that a particular feature, structure, or characteristic described with respect to a feature and / or example may be included in at least one feature and / or example of the claimed subject matter. Thus, appearances of the phrases "in one example," "an example," "some examples," or "in some implementations" or other similar phrases in various places throughout this specification do not necessarily all refer to the same features, examples, and / or limitations. Furthermore, particular features, structures, or characteristics may be combined in one or more examples and / or features.

[0112] Some portions of the detailed descriptions contained herein are presented in terms of algorithms or symbolic representations of operations on binary digital signals stored within the memory of a particular apparatus or special purpose computing device or platform. In the context of this particular specification, the term particular apparatus or the like includes a general purpose computer that, when programmed, performs particular operations pursuant to instructions from program software. Algorithmic descriptions or symbolic representations are examples of techniques used by those skilled in the signal processing or related arts to convey the substance of their work to others skilled in the art. An algorithm is here, and generally, considered to be a self-consistent sequence of operations or similar signal processing leading to a desired result. In this context, operations or processing involve physical manipulations of physical quantities. Usually, though not necessarily, such quantities may take the form of electrical or magnetic signals capable of being stored, transferred, combined, compared, and otherwise manipulated. It has proven convenient at times, principally for reasons of common usage, to refer to such signals as bits, data, values, elements, symbols, characters, terms, numbers, numeric values, or the like. It should be understood, however, that all of these or similar terms are to be associated with the appropriate physical quantities and are merely convenient labels. Unless otherwise expressly stated, and as will be apparent from the description herein, it is appreciated that throughout this specification, descriptions utilizing terms such as "processing," "computing," "calculating," "determining," and the like refer to the actions or processes of a particular apparatus, such as a special purpose computer, a special purpose computing apparatus, or a similar special purpose electronic computing device. Thus, in the context of this specification, a special purpose computer or similar special purpose electronic computing device is generally capable of manipulating or transforming signals that are represented as physical electronic or magnetic quantities in the memory, registers, or other information storage, transmission, or display devices of the special purpose computer or similar special purpose electronic computing device.

[0113] In the foregoing detailed description, numerous specific details are set forth to provide a thorough understanding of the claimed subject matter. However, it will be understood by those skilled in the art that the claimed subject matter may be practiced without these specific details. In other instances, methods and apparatuses that would be known by those skilled in the art have not been described in detail so as not to obscure the claimed subject matter.

[0114] As used herein, the terms "and," "or," and "and / or" may have a variety of meanings, which may depend, at least in part, on the context in which such terms are used. Generally, when "or" is used to link a list such as A, B, or C, it shall mean A, B, and C, which is used herein in an inclusive sense, as well as A, B, or C, which is used herein in an exclusive sense. Additionally, as used herein, the term "one or more" may be used to describe any feature, structure, or characteristic in the singular, or may be used to describe multiple features, structures, or characteristics, or some other combination of features, structures, or characteristics. It should be noted, however, that this is merely an illustrative example and that claimed subject matter is not limited to this example.

[0115] While what are presently considered to be exemplary features have been illustrated and described, it will be understood by those skilled in the art that various other modifications may be made and equivalents may be substituted without departing from the claimed subject matter. Additionally, many modifications may be made to adapt a particular situation to the teachings of the claimed subject matter without departing from the central concept described herein.

[0116] Example implementations are described in the following numbered clauses. 1. A method for generating a perceived headroom report (HR) by a first device in a wireless network, comprising: transmitting radio detection and ranging (radar) wireless signals over a wireless medium at a first transmit power from one or more transmit chains of a first device; sensing a radar wireless signal; generating a sensed HR based on sensing a radar wireless signal; and providing a sensed headroom to a network entity in the wireless network. 2. The method of clause 1, wherein sensing the radar wireless signal includes directly sensing the radar wireless signal from at least one of the one or more transmit chains of the first device, and wherein a measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from at least one of the one or more transmit chains of the first device. 3. The method of one or more of clauses 1-2, wherein the sense HR includes an indication of sense headroom, where the sense headroom is the difference between the SI power and the maximum SI power for sensing. 4. One or more of the methods of clauses 1 to 3, wherein: When the maximum SI power is greater than the SI power, the sense headroom is positive; When the maximum SI power is less than the SI power, the sense headroom is negative. 5. One or more of the methods of clauses 1-2, wherein sensing a radar wireless signal comprises: sensing a reflection of a radar wireless signal on a wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; and sensing noise on the wireless medium, wherein: The measured noise power corresponds to the noise perceived on the wireless medium; Sensing HR is SI power - noise power, Received power - SI power - noise power, or Received power - noise power The display may include one or more of the following: 6. The method of one or more of clauses 1-2, wherein the sensing HR includes an indication of a sensing power headroom (PH), where the sensing PH is the difference between the sensing maximum transmit power and the sensing desired transmit power. 7. One or more of the methods of clauses 1 to 6, wherein: When the maximum transmit power for sensing is greater than the desired transmit power, the PH for sensing is positive; When the maximum transmit power for sensing is less than the desired transmit power, the PH for sensing is negative. 8. The method of one or more of clauses 1-6, wherein the desired transmit power for sensing is: a sensing transmit power determined by the first device; or Required transmit power where the desired transmit power indication is a radar server in a wireless network, wherein the first device is a base station; a base station serving a first device, where the first device is a user equipment (UE); or a relay UE, wherein the first device is a UE within range of the relay UE; is obtained from one of 9. The method of clause 1, Further comprising obtaining, by a radar server of the wireless network, a request to adjust a current transmit power for sensing, wherein the adjustment is based on the sensing HR. 10. The method of clause 1, wherein providing the network entity with a sensed HR comprises: unicasting the sensed HR to a second device within the wireless network; broadcasting the sensed HR to a second device; Groupcasting the sensed HR to a second device, or Transmitting the sensed HR to a radar server in a wireless network where the first device is a base station. 11. The method of one or more of clauses 1-10, wherein the second device: a base station serving the first device; or Relay UE between a first device and a base station in a wireless network It is one of them. 12. The method of one or more of clauses 1-11, wherein the sensing HR comprises: an uplink (UL) medium access control layer control element (MAC-CE) on the NR-Uu interface to a base station; or NR-based sidelink MAC-CE to relay UE provided in one or more of: 13. The method of clause 1, further comprising obtaining a trigger for providing a sensed HR, wherein: The trigger is Downlink control information (DCI) on the NR-Uu interface to a base station serving the first device; or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of The sensed HR is provided to the network entity in response to obtaining the trigger; The trigger is based on a request from a radar server of the wireless network for a sensed HR from the first device. 14. The method of clause 1, wherein the sensed HR is periodically provided to the network entity. 15. The method of clause 1, further comprising obtaining an indication of one or more parameters for generating the sensed HR. 16. One or more of the methods of clauses 1 to 15, wherein: The indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the first device; The configuration of one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained. 17. The method of any one or more of clauses 1 to 15, wherein the indication of one or more parameters is: a radio resource control (RRC) message from a base station serving the first device; a Long Term Evolution (LTE) Positioning Protocol (LPP) message from a base station serving the first device; or Messages over NR-based sidelink are periodically obtained in one or more of: 18. The method of clause 1, generating a power HR, where the power HR represents a first power measurement associated with communication over the wireless medium; providing a power HR to a network entity, wherein the sensed HR indicates a difference between a first power measurement and a second power measurement associated with sensing on a wireless medium; Further includes: 19. The method of clause 1, wherein the sensed HR is an aggregate report showing multiple power measurements across multiple sensed trials. 20. The method of one or more of clauses 1-19, wherein the plurality of sensing attempts comprises: Multiple sensing attempts at the same transmission frequency over time, or a plurality of sensing attempts, wherein each sensing attempt is at a different transmission frequency; Contains one of the following: 21. The method of clause 1, further comprising determining a final transmit power for sensing, wherein determining the final transmit power comprises: setting a transmission power for transmitting a radar wireless signal to an initial transmission power; transmitting a radar wireless signal at the transmission power one or more times; attempting to sense reflections of radar wireless signals; recursively increasing the transmit power by a power ramping step based on the one or more failed sensing attempts, transmitting the radar wireless signal one or more times at the increased transmit power, and attempting to sense a reflection of the radar wireless signal until the first device successfully senses a reflection of the radar wireless signal, wherein the increased transmit power used for the successful sensing attempt is the final transmit power for sensing. 22. One or more of the methods of clauses 1-21, wherein the radar wireless signal is transmitted up to a maximum number of transmissions at the same transmission power before determining that one or more sensing attempts at the same transmission power have failed. 23. One or more of the methods of clauses 1 to 22, generating one or more sensing HRs for one or more failed sensing attempts; providing a network entity with one or more sensing HRs; Further includes: 24. The method of one or more of clauses 1-23, wherein one or more sensing HRs for one or more failed sensing attempts are: Transmit power, a transmission counter of the number of transmissions by the first device at the same transmit power; or A power ramping counter for the number of times the transmit power has been increased by a power ramping step. Contains one or more indications of 25. The method of one or more of clauses 1-22, further comprising obtaining an indication of one or more device parameters to be configured by the first device in response to sensing, wherein the one or more device parameters are: initial transmit power, Power ramping step, the maximum number of transmissions at the same transmit power, or The overall maximum number of transmissions that should be performed before the first device will determine that sensing has failed Contains one or more of: 26. The method of clause 1, wherein the first device is a user equipment (UE). 27. One or more of the methods of clauses 1-26, wherein the network entity: a base station serving the UE, or One or more neighboring UEs within range of the UE One or more of the following: 28. The method of clause 1, wherein the first device is a base station and the network entity is a radar server. 29. A device in a wireless network configured to generate a perceived headroom report (HR), comprising: at least one transceiver; at least one memory; and at least one processor coupled to the at least one transceiver and the at least one memory, wherein the at least one processor causes the device to: transmitting, via the at least one transceiver, radio detection and ranging (radar) wireless signals from one or more transmit chains of the device over a wireless medium at a first transmit power; sensing, via at least one transceiver, a radar wireless signal; generating, via at least one processor, a sensed HR based on sensing a radar wireless signal; The wireless network is configured to cause a network entity in the wireless network to provide the sensed HR via the at least one transceiver. 30. The device of clause 29, wherein sensing the radar wireless signal includes directly sensing the radar wireless signal from at least one of the one or more transmit chains of the first device, and wherein a measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from at least one of the one or more transmit chains of the first device. 31. The device of one or more of clauses 29-30, wherein the sensing HR includes an indication of sensing headroom, where the sensing headroom is the difference between the SI power and the maximum SI power for sensing. 32. One or more devices of clauses 29 to 31, wherein: When the maximum SI power is greater than the SI power, the sense headroom is positive; When the maximum SI power is less than the SI power, the sense headroom is negative. 33. One or more devices according to clauses 29-30, wherein: The at least one processor further configures the device to: sensing, via at least one transceiver, a reflection of a radar wireless signal on a wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; and sensing noise associated with sensing reflections via at least one transceiver, wherein: The measured noise power corresponds to the noise perceived on the wireless medium; Sensing HR is SI power - noise power, Received power - SI power - noise power, or Received power - noise power The display may include one or more of the following: 34. The device of one or more of clauses 29-30, wherein the sensing HR includes an indication of a sensing power headroom (PH), where the sensing PH is the difference between the sensing maximum transmit power and the sensing desired transmit power. 35. One or more devices of clauses 29 to 34, wherein: When the maximum transmit power for sensing is greater than the desired transmit power, the PH for sensing is positive; When the maximum transmit power for sensing is less than the desired transmit power, the PH for sensing is negative. 36. The device of one or more of clauses 29-34, wherein the desired transmit power for sensing is: The sensing transmit power determined by the device, or Required transmit power where the desired transmit power indication is a radar server in a wireless network, wherein the device is a base station; a base station serving a device, where the device is a user equipment (UE); or a relay UE, where the device is a UE within range of the relay UE; is obtained from one of 37. The device of clause 29, wherein the at least one processor is further configured to cause the device to obtain, via the at least one transceiver, a request by a radar server of the wireless network to adjust a current transmit power for sensing, wherein the adjustment is based on the sensing HR. 38. The device of clause 29, wherein providing a network entity with a sensed HR comprises: unicasting the sensed HR to a second device within the wireless network; broadcasting the sensed HR to a second device; Groupcasting the sensed HR to a second device, or Transmitting the sensed HR to a radar server in a wireless network where the device is a base station. 39. One or more devices of clauses 29-38, wherein the second device: a base station serving the device, or Relay UE between a first device and a base station in a wireless network It is one of them. 40. The device of one or more of clauses 29-39, wherein the sensing HR is: an uplink (UL) medium access control layer control element (MAC-CE) on the NR-Uu interface to a base station; or NR-based sidelink MAC-CE to relay UE provided in one or more of: 41. The device of clause 29, wherein the at least one processor is further configured to cause the device to obtain, via the at least one transceiver, a trigger for providing a sensed HR, wherein: The trigger is Downlink Control Information (DCI) on the NR-Uu interface to the base station serving the device, or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of The sensed HR is provided to the network entity in response to obtaining the trigger; The trigger is based on a request from the radar server of the wireless network for a sensed HR from the device. 42. The device of clause 29, wherein the at least one processor is further configured to cause the device to periodically provide, via the at least one transceiver, the sensed HR to a network entity. 43. The device of clause 29, wherein the at least one processor is further configured to cause the device to obtain, via the at least one transceiver, an indication of one or more parameters for generating the sensed HR. 44. One or more devices of clauses 29 to 43, wherein: The indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the device; The configuration of one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained. 45. One or more devices of clauses 29 to 43, wherein the indication of one or more parameters is: a radio resource control (RRC) message from a base station serving the device; a Long Term Evolution (LTE) Positioning Protocol (LPP) message from a base station serving the device, or Messages over NR-based sidelink are periodically obtained in one or more of: 46. ​​A device according to clause 29, wherein: The at least one processor further configures the device to: generating, via at least one processor, a power H R , where the power H R indicates a first power measurement associated with communication over the wireless medium; configured to cause a network entity, via the at least one transceiver, to provide a power HR, wherein the sensing HR indicates a difference between a first power measurement and a second power measurement associated with sensing on the wireless medium. 47. The device of clause 29, wherein the sensing HR is an integrated report showing multiple power measurements over multiple sensing attempts. 48. The device of one or more of clauses 29-47, wherein the plurality of sensing attempts comprises: Multiple sensing attempts at the same transmission frequency over time, or a plurality of sensing attempts, wherein each sensing attempt is at a different transmission frequency; Contains one of the following: 49. The device of clause 29, wherein the at least one processor is further configured to cause the device, via the at least one processor, to determine a final transmit power for sensing, wherein determining the final transmit power includes: setting a transmission power for transmitting a radar wireless signal to an initial transmission power; transmitting a radar wireless signal one or more times at the transmit power via at least one transceiver; attempting to sense, via at least one transceiver, a reflection of a radar wireless signal; recursively increasing the transmit power by a power ramping step based on the one or more failed sensing attempts, transmitting the radar wireless signal via the at least one transceiver one or more times at the increased transmit power, and attempting to sense a reflection of the radar wireless signal via the at least one transceiver until the device successfully senses a reflection of the radar wireless signal, wherein the increased transmit power used for the successful sensing attempt is the final transmit power for sensing. 50. The device of one or more of clauses 29-49, wherein the at least one processor is further configured to cause the device to transmit, via the at least one transceiver, a radar wireless signal at the same transmit power up to a maximum number of transmissions, and then determine that one or more sensing attempts at the same transmit power have failed. 51. One or more devices of clauses 29-50, wherein: The at least one processor further configures the device to: generating, via at least one processor, one or more sensing HRs for one or more failed sensing attempts; and configured, via the at least one processor, to cause the network entity to provide one or more sensed HRs. 52. The device of one or more of clauses 29-51, wherein one or more sensing HRs for one or more failed sensing attempts are: Transmit power, A transmission counter for the number of transmissions by the device at the same transmit power, or A power ramping counter for the number of times the transmit power has been increased by a power ramping step. Contains one or more indications of 53. The device of one or more of clauses 29-50, wherein the at least one processor is further configured to cause the device to obtain, via the at least one transceiver, an indication of one or more device parameters to be configured by the device in response to sensing, wherein the one or more device parameters are: initial transmit power, Power ramping step, the maximum number of transmissions at the same transmit power, or The overall maximum number of transmissions that should be performed before the device will decide that sensing has failed Contains one or more of: 54. The device of clause 29, wherein the device is user equipment (UE). 55. One or more devices of clauses 29 to 54, wherein the network entity: a base station serving the UE, or One or more neighboring UEs within range of the UE It is one of them. 56. The device of clause 29, wherein the device is a base station and the network entity is a radar server. 57. A non-transitory computer-readable medium storing instructions, the instructions, when executed by at least one processor of a device in a wireless network configured to generate a sensed headroom report (HR), causing the device to: transmitting radio detection and ranging (radar) wireless signals from one or more transmit chains of the device over a wireless medium at a first transmit power via at least one transceiver of the device; sensing, via at least one transceiver, a radar wireless signal; generating, via at least one processor, a sensed HR based on sensing a radar wireless signal; A network entity in the wireless network is caused to provide the sensed HR via at least one transceiver. 58. The computer-readable medium of clause 57, wherein sensing the radar wireless signal includes directly sensing the radar wireless signal from at least one of the one or more transmit chains of the first device, and wherein a measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from at least one of the one or more transmit chains of the first device. 59. The computer-readable medium of one or more of clauses 57-58, wherein the sense HR includes an indication of the sense headroom, where the sense headroom is the difference between the SI power and the maximum SI power for sensing. 60. The computer-readable medium of one or more of clauses 57-59, wherein: When the maximum SI power is greater than the SI power, the sense headroom is positive; When the maximum SI power is less than the SI power, the sense headroom is negative. 61. The computer-readable medium of one or more of clauses 57-58, wherein: The execution of the instruction is further sensing, via at least one transceiver, a reflection of a radar wireless signal on a wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; and sensing noise associated with sensing the reflection via at least one transceiver, wherein: The measured noise power corresponds to the noise perceived on the wireless medium; Sensing HR is SI power - noise power, Received power - SI power - noise power, or Received power - noise power The display may include one or more of the following: 62. The computer-readable medium of one or more of clauses 57-58, wherein the sensing HR includes an indication of a sensing power headroom (PH), where the sensing PH is the difference between the sensing maximum transmit power and the sensing desired transmit power. 63. The computer-readable medium of one or more of clauses 57-62, wherein: When the maximum transmit power for sensing is greater than the desired transmit power, the PH for sensing is positive; When the maximum transmit power for sensing is less than the desired transmit power, the PH for sensing is negative. 64. The computer-readable medium of one or more of clauses 57-62, wherein the desired transmit power for sensing is: The sensing transmit power determined by the device, or Required transmit power where the desired transmit power indication is a radar server in a wireless network, wherein the device is a base station; a base station serving a device, where the device is a user equipment (UE); or a relay UE, where the device is a UE within range of the relay UE; is obtained from one of 65. The computer-readable medium of clause 57, wherein execution of the instructions further causes the device to obtain, via the at least one transceiver, a request by a radar server of the wireless network to adjust a current transmit power for sensing, wherein the adjustment is based on the sensing HR. 66. The computer-readable medium of clause 57, wherein providing the network entity with the sensed HR includes: unicasting the sensed HR to a second device within the wireless network; broadcasting the sensed HR to a second device; Groupcasting the sensed HR to a second device, or Transmitting the sensed HR to a radar server in a wireless network where the device is a base station. 67. The computer-readable medium of one or more of clauses 57-64, wherein the second device: a base station serving the device, or Relay UE between a first device and a base station in a wireless network It is one of them. 68. The computer-readable medium of one or more of clauses 57-67, wherein the sensing HR comprises: an uplink (UL) medium access control layer control element (MAC-CE) on the NR-Uu interface to a base station; or NR-based sidelink MAC-CE to relay UE provided in one or more of: 69. The computer-readable medium of clause 57, wherein execution of the instructions further causes the device to obtain, via the at least one transceiver, a trigger for providing a sensed HR, wherein: The trigger is Downlink Control Information (DCI) on the NR-Uu interface to the base station serving the device, or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of The sensed HR is provided to the network entity in response to obtaining the trigger; The trigger is based on a request from the radar server of the wireless network for a sensed HR from the device. 70. The computer-readable medium of clause 57, wherein execution of the instructions further causes the device to periodically provide, via the at least one transceiver, a sensed HR to a network entity. 71. The computer-readable medium of clause 57, wherein execution of the instructions further causes the device to obtain, via the at least one transceiver, an indication of one or more parameters for generating the sensed HR. 72. A computer-readable medium according to one or more of clauses 57-71, wherein: The indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the device; The configuration of one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained. 73. The computer-readable medium of one or more of clauses 57-71, wherein the representation of the one or more parameters comprises: a radio resource control (RRC) message from a base station serving the device; a Long Term Evolution (LTE) Positioning Protocol (LPP) message from a base station serving the device, or Messages over NR-based sidelink are periodically obtained in one or more of: 74. The computer-readable medium of clause 57, wherein: The execution of the instruction is further generating, via at least one processor, a power H R , where the power H R indicates a first power measurement associated with communication over the wireless medium; providing a power HR to a network entity via at least one transceiver, wherein the sensed HR indicates a difference between a first power measurement and a second power measurement associated with sensing on a wireless medium. 75. The computer-readable medium of clause 57, wherein the sensing HR is an integrated report showing multiple power measurements over multiple sensing attempts. 76. The computer-readable medium of one or more of clauses 57-75, wherein the plurality of sensing attempts comprises: Multiple sensing attempts at the same transmission frequency over time, or a plurality of sensing attempts, wherein each sensing attempt is at a different transmission frequency; Contains one of the following: 77. The computer-readable medium of clause 57, wherein execution of the instructions further causes the device, via the at least one processor, to determine a final transmit power for sensing, wherein determining the final transmit power includes: setting a transmission power for transmitting a radar wireless signal to an initial transmission power; transmitting a radar wireless signal one or more times at the transmit power via at least one transceiver; attempting to sense, via at least one transceiver, a reflection of a radar wireless signal; recursively increasing the transmit power by a power ramping step based on the one or more failed sensing attempts, transmitting the radar wireless signal via the at least one transceiver one or more times at the increased transmit power, and attempting to sense a reflection of the radar wireless signal via the at least one transceiver until the device successfully senses a reflection of the radar wireless signal, wherein the increased transmit power used for the successful sensing attempt is the final transmit power for sensing. 78. The computer-readable medium of one or more of clauses 57-77, wherein execution of the instructions further causes the device to transmit, via the at least one transceiver, a radar wireless signal at the same transmit power up to a maximum number of transmissions, and then determine that one or more sensing attempts at the same transmit power have failed. 79. A computer-readable medium according to one or more of clauses 57-78, wherein: The execution of the instruction is further generating, via at least one processor, one or more sensing HRs for one or more failed sensing attempts; and causing a network entity, via the at least one processor, to provide one or more sensed HRs. 80. The computer-readable medium of one or more of clauses 57-79, wherein one or more sensing HRs for one or more failed sensing attempts include: Transmit power, A transmission counter for the number of transmissions by the device at the same transmit power, or A power ramping counter for the number of times the transmit power has been increased by a power ramping step. Contains one or more indications of 81. The computer-readable medium of one or more of clauses 57-78, wherein execution of the instructions further causes the device to obtain, via the at least one transceiver, an indication of one or more device parameters to be configured by the device in response to sensing, wherein the one or more device parameters are: initial transmit power, Power ramping step, the maximum number of transmissions at the same transmit power, or The overall maximum number of transmissions that should be performed before the device will decide that sensing has failed Contains one or more of: 82. The computer-readable medium of clause 57, wherein the device is user equipment (UE). 83. The computer-readable medium of one or more of clauses 57-82, wherein the network entity: a base station serving the UE, or One or more neighboring UEs within range of the UE It is one of them. 84. The computer-readable medium of clause 57, wherein the device is a base station and the network entity is a radar server. 85. A device for generating a perceived headroom report (HR) in a wireless network, comprising: means for transmitting radio detection and ranging (radar) wireless signals over a wireless medium at a first transmit power from one or more transmit chains; means for sensing radar wireless signals; means for generating a sensed HR based on sensing a radar wireless signal; and means for providing sensed HR to a network entity in the wireless network. 86. The device of clause 85, wherein the means for sensing a radar wireless signal includes means for directly sensing a radar wireless signal from at least one of the one or more transmit chains, and wherein the measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from at least one of the one or more transmit chains. 87. The device of one or more of clauses 85-86, wherein the sensing HR includes an indication of sensing headroom, where the sensing headroom is the difference between the SI power and the maximum SI power for sensing. 88. One or more devices of clauses 85 to 87, wherein: When the maximum SI power is greater than the SI power, the sensed headroom is positive; When the maximum SI power is less than the SI power, the sense headroom is negative. 89. One or more devices of clauses 85-86, wherein the means for sensing radar wireless signals comprises: means for sensing a reflection of a radar wireless signal on a wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; and means for sensing noise on the wireless medium, wherein: The measured noise power corresponds to the noise perceived on the wireless medium; Sensing HR is SI power - noise power, Received power - SI power - noise power, or Received power - noise power The display may include one or more of the following: 90. The device of one or more of clauses 85-86, wherein the sensing HR includes an indication of a sensing power headroom (PH), where the sensing PH is the difference between the sensing maximum transmit power and the sensing desired transmit power. 91. One or more devices of clauses 85 to 90, wherein: When the maximum transmit power for sensing is greater than the desired transmit power, the PH for sensing is positive; When the maximum transmit power for sensing is less than the desired transmit power, the PH for sensing is negative. 92. The device of one or more of clauses 85-90, wherein the desired transmit power for sensing is: The sensing transmit power determined by the device, or Required transmit power where the desired transmit power indication is a radar server in a wireless network, wherein the device is a base station; a base station serving a device, where the device is a user equipment (UE); or a relay UE, where the device is a UE within range of the relay UE; is obtained from one of 93. A device according to article 85, The method further includes means for obtaining, by a radar server of the wireless network, a request to adjust a current transmit power for sensing, where the adjustment is based on the sensing HR. 94. The device of clause 85, wherein the means for providing a sensed HR to a network entity comprises: means for unicasting the sensed HR to a second device within the wireless network; means for broadcasting the sensed HR to a second device; means for groupcasting the sensed HR to a second device; or Means for transmitting sensed HR to a radar server in a wireless network where the device is a base station. 95. One or more devices of clauses 85-94, wherein the second device is: a base station serving the device, or Intermediate UE between the device and the base station of the wireless network It is one of them. 96. One or more devices of clauses 85-95, wherein the sensing HR: an uplink (UL) medium access control layer control element (MAC-CE) on the NR-Uu interface to a base station; or NR-based sidelink MAC-CE to relay UE provided in one or more of: 97. The device of clause 85, further comprising means for obtaining a trigger for providing a sensed HR, wherein: The trigger is Downlink Control Information (DCI) on the NR-Uu interface to the base station serving the device, or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of The sensed HR is provided to the network entity in response to obtaining the trigger; The trigger is based on a request from the radar server of the wireless network for a sensed HR from the device. 98. The device of clause 85, wherein the sensed HR is periodically provided to a network entity. 99. The device of clause 85, further comprising means for obtaining an indication of one or more parameters for generating the sensed HR. 100. One or more devices of clauses 85-99, wherein: The indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the device; The configuration of one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained. 101. One or more devices of clauses 85-99, wherein the indication of one or more parameters is: a radio resource control (RRC) message from a base station serving the device; a Long Term Evolution (LTE) Positioning Protocol (LPP) message from a base station serving the device, or Messages over NR-based sidelink are periodically obtained in one or more of: 102. A device according to article 85, means for generating a power H R , where the power H R indicates a first power measurement associated with communication over a wireless medium; means for providing a power HR to a network entity, wherein the sensed HR indicates a difference between a first power measurement and a second power measurement associated with sensing on a wireless medium; Further includes: 103. The device of clause 85, wherein the sensing HR is an integrated report showing multiple power measurements over multiple sensing attempts. 104. The device of one or more of clauses 85-104, wherein the plurality of sensing attempts comprises: Multiple sensing attempts at the same transmission frequency over time, or a plurality of sensing attempts, wherein each sensing attempt is at a different transmission frequency; Contains one of the following: 105. The device of clause 85, further comprising means for determining a final transmit power for sensing, wherein determining the final transmit power comprises: setting a transmission power for transmitting a radar wireless signal to an initial transmission power; transmitting a radar wireless signal at the transmission power one or more times; attempting to sense reflections of radar wireless signals; recursively increasing the transmit power by a power ramping step based on the one or more failed sensing attempts, transmitting the radar wireless signal one or more times at the increased transmit power, and attempting to sense a reflection of the radar wireless signal until the device successfully senses a reflection of the radar wireless signal, wherein the increased transmit power used for the successful sensing attempt is the final transmit power for sensing. 106. One or more devices of clauses 85-105, wherein the radar wireless signal is transmitted up to a maximum number of transmissions at the same transmission power before determining that one or more sensing attempts at the same transmission power have failed. 107. One or more devices according to clauses 85 to 106, means for generating one or more sensing HRs for one or more failed sensing attempts; means for providing one or more sensed HRs to a network entity; Further includes: 108. The device of one or more of clauses 85-107, wherein one or more sensing HRs for one or more failed sensing attempts are: Transmit power, A transmission counter for the number of transmissions by the device at the same transmit power, or A power ramping counter for the number of times the transmit power has been increased by a power ramping step. Contains one or more indications of 109. One or more devices of clauses 85-106, further including means for obtaining an indication of one or more device parameters to be configured by the device for sensing, wherein the one or more device parameters are: initial transmit power, Power ramping step, the maximum number of transmissions at the same transmit power, or The overall maximum number of transmissions that should be performed before the device will decide that sensing has failed Contains one or more of: 110. The device of clause 85, wherein the device is user equipment (UE). 111. One or more devices of clauses 85-110, wherein the network entity: a base station serving the UE, or One or more neighboring UEs within range of the UE One or more of the following: 112. The device of clause 85, wherein the device is a base station and the network entity is a radar server.

[0117] It is therefore intended that claimed subject matter not be limited to the particular examples disclosed, but that such claimed subject matter also include all embodiments falling within the scope of the appended claims and equivalents thereof. [Explanation of symbols]

[0118] 100 Wireless Communication System 102 gNB, base station 104 User Equipment (UE) 110 Geographic Coverage Areas 120 Communication Links 122 backhaul links 134 backhaul links 150 WLAN AP 164 User Equipment (UE) 170 Core Network 172 Radar Server 180 mmW base station 182 User Equipment (UE) 184 mmW communication link 192 D2D P2P links 212 Data Sources 220 Transmit Processor 230 Transmit (TX) Multiple Input Multiple Output (MIMO) Processor 232 Modulator (MOD), Demodulator (DEMOD) 234 Antenna 236 MIMO detector 238 Receive Processor 239 Data Sink 240 Controllers / Processors 242 memory 244 communication unit 246 Scheduler 252 Antenna 254 Modulator (MOD), Demodulator (DEMOD) 256 MIMO detector 258 Receive Processor 260 Data Sink 262 Data Sources 264 Transmit Processor 266 TX MIMO Processor 280 Controller / Processor 282 memory 300 User Equipment (UE) 310 processor 311 memory 312 Software (SW) 313 Sensor 314 Transceiver Interface 315 Transceiver 316 User Interface 318 Camera 320 Bus 330 Application Processor 331 Digital Signal Processor (DSP) 332 modem processor 333 Video Processor 334 Sensor Processor 340 Wireless Transceiver 342 Transmitter 344 Receiver 346 Antenna 348 Wireless Signal 350 Wired Transceiver 352 Transmitter 354 Receiver 372 Radar Session Module 400 base stations 410 processor 411 memory 412 Software (SW) 415 Transceiver 420 Bus 440 Wireless Transceiver 442 Transmitter 444 receiver 446 Antenna 448 Wireless Signal 450 Wired Transceiver 452 Transmitter 454 receiver 472 Radar Session Module 502 devices 504 Send Chain 506 receive chain 508 Antenna 510 Antenna 512 radar signal 514 Object 516 reflection 518 Signal

Claims

1. 1. A method for generating a sensed headroom report (HR) by a first device in a wireless network, comprising: transmitting radio detection and ranging (radar) wireless signals over a wireless medium at a first transmit power from one or more transmit chains of the first device; sensing said radar wireless signal; generating a sensed HR based on the step of sensing the radar wireless signal; providing the sensed HR to a network entity in the wireless network; A method comprising:

2. 10. The method of claim 1, wherein sensing the radar wireless signal comprises directly sensing the radar wireless signal from at least one of the one or more transmit chains of the first device, and wherein a measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from the at least one of the one or more transmit chains of the first device.

3. The method of claim 2 , wherein the sensed HR includes an indication of a sensed headroom, the sensed headroom being the difference between the SI power and a maximum SI power for sensing.

4. the step of sensing a radar wireless signal comprises: sensing a reflection of the radar wireless signal on the wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; sensing noise on the wireless medium; further comprising the measured noise power corresponds to the noise perceived on the wireless medium; The sensed HR is the SI power minus the noise power, total received power - the SI power - the noise power, or the total received power minus the noise power The method of claim 2 , including one or more indications of:

5. 10. The method of claim 1, wherein the sensing HR includes an indication of a power headroom (PH) for sensing, the PH for sensing being a difference between a maximum transmit power for sensing and a desired transmit power for sensing, an aggregate report indicating multiple power measurements over multiple sensing attempts, or a combination thereof.

6. The desired transmit power for sensing is: a sensing transmit power determined by the first device; or Required transmit power and the indication of required transmit power is one of: a radar server of the wireless network, wherein the first device is a base station; a base station serving the first device, the first device being a user equipment (UE); or a relay UE, wherein the first device is a UE within range of the relay UE; The method of claim 5, wherein the signal is obtained from one of the following:

7. and further comprising: obtaining, by a radar server of the wireless network, a request to adjust a current transmit power for sensing, the adjustment being based on the sensing HR. The method of claim 1.

8. providing the sensed HR to the network entity, unicasting the sensed HR to a second device in the wireless network; broadcasting the sensed HR to the second device; groupcasting the sensed HR to the second device; or transmitting the sensed HR to a radar server of the wireless network. and the first device is a base station.

9. further comprising obtaining a trigger for providing the sensed HR; The trigger is Downlink control information (DCI) on the NR-Uu interface to a base station serving the first device; or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of the sensed HR is provided to the network entity in response to obtaining the trigger; the trigger is based on a request from a radar server of the wireless network for the sensed HR from the first device; The method of claim 1.

10. obtaining an indication of one or more parameters for generating the sensed HR; the indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the first device; The configuration of the one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained. The method of claim 1.

11. 1. A device in a wireless network configured to generate a perceived headroom report (HR), comprising: at least one transceiver; At least one memory; at least one processor coupled to the at least one transceiver and the at least one memory, the device comprising: transmitting, via the at least one transceiver, radio detection and ranging (radar) wireless signals from one or more transmit chains of the device over a wireless medium at a first transmit power; sensing said radar wireless signals via said at least one transceiver; generating, via the at least one processor, the sensed HR based on sensing the radar wireless signal; providing the sensed HR to a network entity in the wireless network via the at least one transceiver; A device configured to cause

12. 12. The device of claim 11, wherein sensing the radar wireless signal comprises directly sensing the radar wireless signal from at least one of the one or more transmit chains of the first device, and wherein a measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from the at least one of the one or more transmit chains of the first device.

13. 13. The device of claim 12, wherein the sensing HR includes an indication of sensing headroom, the sensing headroom being the difference between the SI power and a maximum SI power for sensing.

14. The at least one processor may cause the device to: sensing, via the at least one transceiver, a reflection of the radar wireless signal on the wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; sensing noise associated with sensing the reflection via the at least one transceiver; and further configured to cause the measured noise power corresponds to the noise perceived on the wireless medium; The sensed HR is the SI power minus the noise power, total received power - the SI power - the noise power, or the total received power minus the noise power 13. The device of claim 12, comprising one or more indications of:

15. 12. The device of claim 11, wherein the sensing HR includes an indication of a power headroom (PH) for sensing, the PH for sensing being a difference between a maximum transmit power for sensing and a desired transmit power for sensing, an aggregate report indicating multiple power measurements over multiple sensing attempts, or a combination thereof.

16. The desired transmit power for sensing is: a sensing transmit power determined by said device; or Required transmit power and the indication of required transmit power is one of: a radar server of the wireless network, the device being a base station; a base station serving the device, the device being a user equipment (UE); or a relay UE, wherein the device is a UE within range of the relay UE; The device of claim 15, wherein the signal is obtained from one of the following:

17. 12. The device of claim 11, wherein the at least one processor is further configured to cause the device to obtain, via the at least one transceiver, a request by a radar server of the wireless network to adjust a current transmit power for sensing, the adjustment being based on the sensing HR.

18. providing the network entity with the sensed HR, unicasting the sensed HR to a second device in the wireless network; broadcasting the sensed HR to the second device; groupcasting the sensed HR to the second device; or transmitting the sensed HR to a radar server of the wireless network; 12. The device of claim 11, wherein the device is a base station.

19. the at least one processor is further configured to cause the device to obtain, via the at least one transceiver, a trigger for providing the sensed HR; The trigger is Downlink control information (DCI) on the NR-Uu interface to a base station serving the device; or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of the sensed HR is provided to the network entity in response to obtaining the trigger; the trigger is based on a request from a radar server of the wireless network for the sensed HR from the device; The device of claim 11.

20. the at least one processor is configured to cause the device to further obtain, via the at least one transceiver, an indication of one or more parameters for generating the sensed HR; the indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the first device; The configuration of the one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained. The device of claim 11.

21. 1. A non-transitory computer-readable storage medium storing instructions, which when executed by at least one processor of a device in a wireless network configured to generate a sensed headroom report (HR), cause the device to: transmitting, via at least one transceiver of the device, radio detection and ranging (radar) wireless signals from one or more transmit chains of the device at a first transmit power onto a wireless medium; sensing said radar wireless signals via said at least one transceiver; generating, via the at least one processor, the sensed HR based on sensing the radar wireless signal; providing the sensed HR to a network entity in the wireless network via the at least one transceiver; A non-transitory computer-readable recording medium that causes the

22. 22. The computer-readable medium of claim 21 , wherein sensing the radar wireless signal includes directly sensing the radar wireless signal from at least one of the one or more transmit chains of the first device, and wherein a measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from the at least one of the one or more transmit chains of the first device.

23. 23. The computer-readable medium of claim 22, wherein the sensed HR includes an indication of a sensed headroom, the sensed headroom being a difference between the SI power and a maximum SI power for sensing.

24. Execution of the instructions causes the device to: sensing, via the at least one transceiver, a reflection of the radar wireless signal on the wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; sensing noise associated with sensing the reflection via the at least one transceiver; Further, the measured noise power corresponds to the noise perceived on the wireless medium; The sensed HR is the SI power minus the noise power, total received power - the SI power - the noise power, or the received power minus the noise power 23. The computer-readable medium of claim 22, comprising one or more representations of:

25. 22. The computer-readable medium of claim 21, wherein the sensing HR includes an indication of a power headroom (PH) for sensing, the PH for sensing being a difference between a maximum transmit power for sensing and a desired transmit power for sensing, an aggregate report indicating multiple power measurements over multiple sensing attempts, or a combination thereof.

26. The desired transmit power for sensing is: a sensing transmit power determined by said device; or Required transmit power and the indication of required transmit power is one of: a radar server of the wireless network, the device being a base station; a base station serving the device, the device being a user equipment (UE); or a relay UE, wherein the device is a UE within range of the relay UE; 26. The computer-readable medium of claim 25, wherein the computer-readable medium is obtained from one of:

27. 22. The computer-readable medium of claim 21, wherein execution of the instructions further causes the device to obtain, via the at least one transceiver, a request by a radar server of the wireless network to adjust a current transmit power for sensing, the adjustment being based on the sensing HR.

28. providing the network entity with the sensed HR, unicasting the sensed HR to a second device in the wireless network; broadcasting the sensed HR to the second device; groupcasting the sensed HR to the second device; or transmitting the sensed HR to a radar server of the wireless network; 22. The computer-readable medium of claim 21, wherein the device is a base station.

29. Execution of the instructions further causes the device to obtain, via the at least one transceiver, a trigger for providing the sensed HR; The trigger is Downlink control information (DCI) on the NR-Uu interface to a base station serving the device; or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of the sensed HR is provided to the network entity in response to obtaining the trigger; the trigger is based on a request from a radar server of the wireless network for the sensed HR from the device; 22. The computer-readable storage medium of claim 21.

30. Execution of the instructions further causes the device to obtain, via the at least one transceiver, an indication of one or more parameters for generating the sensed HR; the indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the first device; 22. The computer-readable medium of claim 21, wherein the configuration of the one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained.

31. 1. A device for generating a perceived headroom report (HR) in a wireless network, comprising: means for transmitting radio detection and ranging (radar) wireless signals over a wireless medium at a first transmit power from one or more transmit chains; means for sensing said radar wireless signal; means for generating a sensed HR based on sensing the radar wireless signal; means for providing the sensed HR to a network entity in the wireless network; A device comprising:

32. 32. The device of claim 31 , wherein the means for sensing the radar wireless signal comprises means for directly sensing the radar wireless signal from at least one of the one or more transmit chains, and wherein a measured self-interference (SI) power of the sensed radar wireless signal corresponds to the radar wireless signal directly sensed from the at least one of the one or more transmit chains.

33. 33. The device of claim 32, wherein the sensed HR includes an indication of a sensed headroom, the sensed headroom being a difference between the SI power and a maximum SI power for sensing.

34. said means for sensing said radar wireless signal, means for sensing a reflection of the radar wireless signal on the wireless medium, wherein a measured first received power of the reflection of the radar wireless signal corresponds to the reflection sensed on the wireless medium; means for sensing noise on said wireless medium; further comprising the measured noise power corresponds to the noise perceived on the wireless medium; The sensed HR is the SI power minus the noise power, total received power - the SI power - the noise power, or the total received power minus the noise power 33. The device of claim 32, comprising one or more indications of:

35. 32. The device of claim 31, wherein the sensing HR includes an indication of a power headroom (PH) for sensing, wherein the PH for sensing is a difference between a maximum transmit power for sensing and a desired transmit power for sensing, or is an aggregate report indicating multiple power measurements over multiple sensing attempts, or a combination thereof.

36. The desired transmit power for sensing is: a sensing transmit power determined by said device; or Required transmit power and the indication of required transmit power is one of: a radar server of the wireless network, the device being a base station; a base station serving the device, the device being a user equipment (UE); or a relay UE, wherein the device is a UE within range of the relay UE; 36. The device of claim 35, wherein the signal is obtained from one of:

37. and means for receiving, by a radar server of the wireless network, a request to adjust a current transmit power for sensing, the adjustment being based on the sensing HR.

32. The device of claim 31.

38. The means for providing the sensed HR to the network entity, means for unicasting the sensed HR to a second device in the wireless network; means for broadcasting the sensed HR to the second device; means for groupcasting the sensed HR to the second device; or means for transmitting the sensed HR to a radar server of the wireless network; 32. The device of claim 31, wherein the device is a base station.

39. means for obtaining a trigger for providing the sensed HR; The trigger is Downlink control information (DCI) on the NR-Uu interface to a base station serving the device; or Sidelink Control Information (SCI) on NR-based Sidelink is obtained in one of the sensed HR is provided to the network entity in response to obtaining the trigger; the trigger is based on a request from a radar server of the wireless network for the sensed HR from the device; 32. The device of claim 31.

40. means for obtaining an indication of one or more parameters for generating the sensed HR; the indication is obtained in a medium access control layer control element (MAC-CE) on an NR-Uu interface or an NR-based sidelink to a base station serving the first device; The configuration of the one or more parameters persists for one or more sensed HRs until another indication of the one or more parameters is obtained.

32. The device of claim 31.

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