Ue assisted radar processing

Abstract

The present disclosure provides systems, devices, apparatuses, and methods, including computer programs encoded on a storage medium, for bistatic radar-assisted sensing. The radar receiver receives (210) a configuration message from the radar transmitter that configures the radar receiver to assist the radar transmitter in bistatic radar sensing. The radar receiver receives (214) a reflection of the radar signal. In response to receiving the reflection of the radar signal, the radar receiver sends (218) a radar measurement report message to the radar transmitter. The radar receiver receives (202) a radar capability query from the radar transmitter. In response to the radar capability query, the radar receiver sends (204) a radar capability response to the radar transmitter, the radar capability response indicating radar capabilities supported by the radar receiver for bistatic radar sensing.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Patent Application No. US63 / 381,494, filed on October 28, 2022, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] The present disclosure relates generally to wireless communications and, more particularly, to systems and methods of radar signal processing. Background Art

[0003] The 3rd Generation Partnership Project (3GPP) specifies a radio interface known as the fifth generation (5G) New Radio (NR) (5G NR). The architecture of a 5G NR wireless communication system may include a 5G core (5GC) network, a 5G radio access network (5G-RAN), user equipment (UE), etc. The 5G NR architecture may provide increased data rates, reduced latency, and / or increased capacity compared to other types of wireless communication systems.

[0004] Wireless communication systems may generally be configured to provide various telecommunication services (e.g., telephony, video, data, messaging, broadcasting, etc.) based on multiple access technologies (e.g., orthogonal frequency division multiple access (OFDMA) technologies) that support communication with multiple UEs. Mobile broadband improvements such as the integration of radar technology with mobile broadband technology are useful for the continued development of such wireless communication technologies. However, challenges in implementing radar in communication systems include self-interference cancellation in a single-base system, which may result in loss of communication information in the case where the transmitted and received signals carry both radar information and communication information. Summary of the invention

[0005] The following presents a simplified summary to provide a basic understanding of various aspects of the present disclosure. This summary is not an extensive overview of all contemplated aspects. Instead, this summary is a prelude to a more detailed description below.

[0006] Conventional techniques for object detection using a monostatic radar configuration with full-duplex operation may result in high self-interference from the radar transmitter to the radar receiver (e.g., within the same radar transceiver). High self-interference may degrade the performance of full-duplex operation and negatively impact radar sensing accuracy.

[0007] In a first example, the present disclosure solves the above and other deficiencies by performing bistatic radar sensing using a user equipment (UE) as a radar receiver and a network entity as a radar transmitter. For example, a network entity may perform bistatic radar sensing with the assistance of a UE. In order to perform bistatic radar sensing with the assistance of a UE, the network entity configures the UE based on the radar capabilities of the UE using a radar assistance configuration message. The network entity sends a radar assistance configuration message to the UE that assists the network entity in performing bistatic radar sensing. The network entity sends a radar signal that is reflected from an object toward the UE. The network entity may add downlink communication information to the radar signal to obtain a combined radar and communication signal. The UE may demodulate and decode the communication portion of the received combined radar and communication signal. The network entity receives a radar measurement report message from the UE that includes radar information for the object.

[0008] Alternatively or additionally, the UE may be configured as a radar transmitter. And the network entity may be configured as a radar receiver. In this example, the UE requests the network entity to assist the UE in performing bistatic radar sensing. For example, if the UE can perform the function of a radar transmitter, the UE may query the network entity whether it can perform the function of a radar receiver. The network entity sends radar receiver capability information to the UE. That is, if the network entity can assist the UE, the network entity sends a first confirmation message, and if the network entity cannot assist the UE, the network entity sends a second confirmation message. The UE sends a radar signal that is reflected from an object toward the network entity. The UE may add uplink communication information to the radar signal to obtain a combined radar and communication signal. The BS may demodulate and decode the communication portion of the received combined radar and communication signal. The network entity performs radar processing and sends a radar measurement report message including radar information for the object to the UE.

[0009] Thus, a UE and / or network entity performing bistatic radar sensing may overcome limitations associated with conventional monostatic object detection techniques. A UE and / or network entity performing bistatic radar sensing may reduce high self-interference caused by a radar transmitter to a radar receiver, which may result in reduced full-duplex system performance.

[0010] Another example includes a base station (BS) or a UE having hardware configured to implement the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1A A diagram of a wireless communication system including a plurality of user equipments (UEs) and network entities communicating through one or more cells is shown.

[0012] Figure 1B to Figure 1Cis a diagram illustrating an example environment for implementing user equipment (UE) assisted radar processing in accordance with some embodiments.

[0013] Figure 2 is a signal transmission diagram illustrating a procedure for radar sensing assistance with a network entity as a radar transmitter according to some embodiments.

[0014] Figure 3 is a signal transmission diagram illustrating a procedure for radar sensing assistance with a UE as a radar transmitter according to some embodiments.

[0015] Figure 4 is a flow chart of a method of radar sensing assistance at a radar transmitter according to some embodiments.

[0016] Figure 5 is a flow chart of a method of radar sensing assistance at a radar receiver according to some embodiments.

[0017] Figure 6 is a block diagram illustrating an example of a hardware implementation for an example UE equipment.

[0018] Figure 7 is a diagram illustrating an example of a hardware implementation for one or more example network entities. DETAILED DESCRIPTION

[0019] Figure 1AA diagram 100 of a wireless communication system associated with a plurality of cells 190 is shown. The wireless communication system includes a user equipment (UE) 102 and base stations 104, some of which 104c include a converged base station architecture and other base stations 104a-104b include a decomposed base station architecture. The UE 102 may include a radar device 103a, and the base station 104c may include a radar device 103b. The UE 102 may communicate with the base station 104c via one or more radio frequency (RF) access links 178. The converged base station architecture includes a radio unit (RU) 106, a distributed unit (DU) 108, and a centralized unit (CU) 110, which are configured to utilize a radio protocol stack physically or logically integrated within a single radio access network (RAN) node. The decomposed base station architecture utilizes a protocol stack physically or logically distributed between two or more units (e.g., RU 106, DU 108, CU 110). For example, the CU 110 is implemented within a RAN node, and one or more DUs 108 may be co-located with the CU 110, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. The DU 108 may be implemented to communicate with one or more RUs 106. Each of the RUs 106, DUs 108, and CUs 110 may be implemented as a virtual unit, such as a virtual radio unit (VRU), a virtual distributed unit (VDU), or a virtual central unit (VCU). The base station 104 and / or units of the base station 104, such as the RU 106, DU 108, or CU 110, may be referred to as a transmission reception point (TRP).

[0020] The operation and / or network design of the base station 104 can be based on the aggregation characteristics of the base station functions. For example, a decomposed base station architecture is utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN) network, or a virtualized radio access network (vRAN) (which may also be referred to as a cloud radio access network (C-RAN)). Decomposition can include distributing functions between two or more units located at various physical locations, and virtually distributing the functions of at least one unit, which can achieve flexibility in network design. Various units of the decomposed base station architecture or decomposed RAN architecture can be configured for wired or wireless communication with at least one other unit. For example, CU 110a communicates with DU 108a-108b via a corresponding midhaul link 162 based on an F1 interface. DU 108a-108b can communicate with RU106a and RU 106b-106c via corresponding fronthaul links 160, respectively. RU 106a-106c can communicate with corresponding UE 102a-102c and 102s via one or more radio frequency (RF) access links 178 based on Uu interface. In an example, multiple RU 106 and / or base station 104 can provide services for UE 102 at the same time, such as UE 102a of cell 190a being served by access link 178 of RU 106a of cell 190a and UE 102a of cell 190e being served by base station 104c of cell 190e at the same time.

[0021] One or more CUs 110, such as CU 110a or CU 110d, may communicate directly with the core network 120 via a backhaul link 164. For example, CU 110d communicates with the core network 120 via a backhaul link 164 based on a next generation (NG) interface. One or more CUs 110 may also communicate indirectly with the core network 120 through one or more decomposed base station units, such as a near real-time RAN intelligent controller (RIC) 128 via an E2 link and a service management and orchestration (SMO) framework 116 that may be associated with a non-real-time RIC 118. The near real-time RIC 128 may communicate with the SMO framework 116 and / or the non-real-time RIC 118 via an A1 link. The SMO framework 116 and / or the non-real-time RIC 118 may also communicate with an open cloud (O-cloud) 130 via an O2 link. One or more CUs 110 may further communicate with each other via a backhaul link 164 based on an Xn interface. For example, the CU 110d of the base station 104c communicates with the CU 110a of the base station 104b via the backhaul link 164 based on the Xn interface. Similarly, the base station 104c of the cell 190e can communicate with the CU 110a of the base station 104b via the backhaul link 164 based on the Xn interface.

[0022] RU 106, DU 108 and CU 110 and near real-time RIC 128, non-real-time RIC 118 and / or SMO framework 116 may include (or may be coupled to) one or more interfaces configured to send or receive information / signals via a wired or wireless transmission medium. Base station 104 or any one of the one or more decomposed base station units may be configured to communicate with one or more other base stations 104 or one or more other decomposed base station units via a wired or wireless transmission medium. In an example, a processor, memory and / or controller associated with executable instructions of the interface may be configured to provide communication between base station 104 and / or one or more decomposed base station units via a wired or wireless transmission medium. For example, a wired interface may be configured to send or receive information / signals via a wired transmission medium, such as a fronthaul link 160 between a RU 106d and a baseband unit (BBU) 112 for a cell 190d, or more specifically, a fronthaul link 160 between a RU 106d and a DU 108d. The BBU 112 includes the DU 108d and the CU 110d, which may also have a wired interface configured between the DU 108d and the CU 110d to send or receive information / signals between the DU 108d and the CU 110d based on the midhaul link 162. In a further example, a wireless interface, which may include a receiver, a transmitter, or a transceiver (such as an RF transceiver), may be configured to send or receive information / signals via a wireless transmission medium, such as information transmitted between the RU 106a of the cell 190a and the base station 104c of the cell 190e via cross-cell communication beams of the RU 106a and the base station 104c.

[0023] One or more high-level control functions (such as functions related to radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc.) can be hosted at CU 110. Each control function can be associated with an interface for transmitting signals based on one or more other control functions hosted at CU 110. User plane functions (such as central unit-user plane (CU-UP) functions), control plane functions (such as central unit-control plane (CU-CP) functions), or a combination thereof can be implemented based on CU 110. For example, CU 110 may include one or more CU-UP processes and / or one or more CU-CP processes. When implemented in an O-RAN configuration, the CU-UP function can be based on bidirectional communication with the CU-CP function via an interface (such as an E1 interface (not shown)).

[0024] The CU 110 may communicate with the DU 108 for network control and signal transmission. The DU 108 is a logical unit of the base station 104 that is configured to perform one or more base station functions. For example, the DU 108 may control the operation of one or more RUs 106. One or more of the following may be hosted at the DU 108: a radio link control (RLC) layer, a media access control (MAC) layer, or one or more higher physical (PHY) layers, such as forward error correction (FEC) modules for encoding / decoding, scrambling, modulation / demodulation, etc. The DU 108 may host such functions based on the functional division of the DU 108. The DU 108 may similarly host one or more lower PHY layers, where each lower layer or module may be implemented based on an interface for communicating with other layers and modules hosted at the DU 108, or based on a control function hosted at the CU 110.

[0025] The RU 106 may be configured to implement lower layer functions. For example, the RU 106 is controlled by the DU 108 and may correspond to a logical node hosting RF processing functions or lower layer PHY functions, such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc. The functions of the RU 106 may be based on functional partitioning, such as lower layer functional partitioning.

[0026] RU 106 can send or receive over-the-air (OTA) communications with one or more UEs 102. For example, RU 106b of cell 190b communicates with UE 102b of cell 190b via a first communication beam set 132 of RU 106b and a second communication beam set 134b of UE 102b, which may correspond to inter-cell communication beams or cross-cell communication beams. For example, UE 102b of cell 190b can communicate with RU 106a of cell 190a via a third communication beam set 134a of UE 102b and a RU beam set 136 of RU 106a. Both real-time and non-real-time features of control plane and user plane communications of RU 106 can be controlled by the associated DU 108. Therefore, DU 108 and CU 110 can be used in a cloud-based RAN architecture (such as a vRAN architecture), and SMO framework 116 can be used to support non-virtualized and virtualized RAN network elements. For non-virtualized network elements, the SMO framework 116 can support the deployment of dedicated physical resources for RAN coverage, where the dedicated physical resources can be managed through an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 116 can interact with a cloud computing platform such as O-cloud 130 via an O2 link (e.g., a cloud computing platform interface) to manage the network elements. Virtualized network elements can include, but are not limited to, RU 106, DU 108, CU 110, near real-time RIC 128, etc.

[0027] The SMO framework 116 may be configured to communicate directly with one or more RUs 106 using an O1 link. The non-real-time RIC 118 of the SMO framework 116 may also be configured to support the functionality of the SMO framework 116. For example, the non-real-time RIC 118 implements logic functions that are capable of controlling non-real-time RAN features and resources, features / applications of the near real-time RIC 128, and / or artificial intelligence / machine learning (AI / ML) processes. The non-real-time RIC 118 may communicate (or couple) with the near real-time RIC 128, such as via an A1 interface. The near real-time RIC 128 may implement logic functions that are capable of controlling near real-time RAN features and resources based on data collection and interaction via an E2 interface, such as an E2 interface between the near real-time RIC 128 and the CU 110a and the DU 108b.

[0028] The non-real-time RIC 118 may receive parameters or other information from an external server to generate an AI / ML model for deployment in the near-real-time RIC 128. For example, the non-real-time RIC 118 receives parameters or other information from the O-cloud 130 via the O2 link to deploy the AI / ML model to the real-time RIC 128 via the A1 link. The near-real-time RIC 128 may utilize the parameters and / or other information received from the non-real-time RIC 118 or the SMO framework 116 via the A1 link to perform near-real-time functions. The near-real-time RIC 128 and the non-real-time RIC 118 may be configured to adjust the performance of the RAN. For example, the non-real-time RIC 118 monitors patterns and long-term trends to improve the performance of the RAN. The non-real-time RIC 118 may also deploy the AI / ML model through the SMO framework 116 for implementing corrective actions, such as initiating reconfiguration of the O1 link or instructing the management process of the A1 link.

[0029] Any combination of RU 106, DU 108, and CU 110 or reference to them individually may correspond to base station 104. Therefore, base station 104 may include at least one of RU 106, DU 108, or CU 110. Base station 104 provides UE 102 with access to core network 120. That is, base station 104 may relay communications between UE 102 and core network 120. Base station 104 may be associated with a macro cell of a high-power cellular base station and / or a small cell of a low-power cellular base station. For example, cell 190e corresponds to a macro cell, and cells 190a-190d may correspond to a small cell. Small cells include femto cells, micro cells, micro cells, etc. A cell structure including at least one macro cell and at least one small cell may be referred to as a "heterogeneous network."

[0030] Transmissions from the UE 102 to the base station 104 / RU 106 are referred to as uplink (UL) transmissions, while transmissions from the base station 104 / RU 106 to the UE 102 are referred to as downlink (DL) transmissions. Uplink transmissions may also be referred to as reverse link transmissions, while downlink transmissions may also be referred to as forward link transmissions. For example, the RU 106 d utilizes the antenna of the base station 104 c of the cell 190 d to send downlink / forward link communications to the UE 102 d, or receive uplink / reverse link communications from the UE 102 d, based on the Uu interface associated with the access link 178 between the UE 102 d and the base station 104 c / RU 106 d.

[0031] The communication link between UE 102 and base station 104 / RU 106 can be based on multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link can be associated with one or more carriers. UE 102 and base station 104 / RU 106 can utilize Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, 800 MHz, 1600 MHz, 2000 MHz, etc.) spectrum bandwidth allocated per carrier in carrier aggregation up to a total of Yx MHz, where x component carriers (CCs) are used for communication in each direction of the uplink direction and the downlink direction. The carriers may be adjacent to each other along the spectrum, or may not be adjacent to each other. In an example, uplink carriers and downlink carriers may be allocated in an asymmetric manner, and more or fewer carriers may be allocated for uplink or downlink. The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be associated with a primary cell (PCell) and the secondary component carrier may be associated with a secondary cell (SCell).

[0032] Some UEs 102 (such as UEs 102a and 102s) can perform device-to-device (D2D) communication via a side link. For example, a side link communication / D2D link utilizes a spectrum of a wireless wide area network (WWAN) associated with uplink communication and downlink communication. The side link communication / D2D link can also use one or more side link channels, such as a physical side link broadcast channel (PSBCH), a physical side link discovery channel (PSDCH), a physical side link shared channel (PSSCH), and / or a physical side link control channel (PSCCH) to transmit information between UEs 102a and 102s. Such side link / D2D communication can be performed via various wireless communication systems, such as wireless fidelity (Wi-Fi) systems, Bluetooth systems, long term evolution (LTE) systems, new radio (NR) systems, etc.

[0033] The electromagnetic spectrum is typically subdivided into different categories, frequency bands, channels, etc. based on different frequencies / wavelengths associated with the electromagnetic spectrum. The fifth generation (5G) NR is typically associated with two operating frequency bands (FRs) referred to as frequency range 1 (FR1) and frequency range 2 (FR2). FR1 ranges from 410 MHz to 7.125 GHz, and FR2 ranges from 24.25 GHz to 71.0 GHz, which includes FR2-1 (24.25 GHz to 52.6 GHz) and FR2-2 (52.6 GHz to 71.0 GHz). Although a portion of FR1 is actually greater than 6 GHz, FR1 is typically referred to as the "below 6 GHz" band. In contrast, FR2 is typically referred to as the "millimeter wave" (mmW) band. FR2 is different from the "extremely high frequency" (EHF) band, but is an approximate subset of the band, the EHF band ranges from 30GHz to 300 GHz, and is sometimes also referred to as the "millimeter wave" band. Frequencies between FR1 and FR2 are generally referred to as "mid-band" frequencies. The operating frequency band of mid-band frequencies may be referred to as frequency range 3 (FR3), which ranges from 7.125 GHz to 24.25 GHz. The frequency band within FR3 may include the characteristics of FR1 and / or FR2. Therefore, the characteristics of FR1 and / or FR2 may be extended to mid-band frequencies. Higher operating frequency bands have been identified as extending 5G NR communications to 52.6 GHz above the upper limit associated with FR2. Three of these higher operating frequency bands include FR2-2 with a range of 52.6 GHz to 71.0 GHz, FR4 with a range of 71.0 GHz to 114.25 GHz, and FR5 with a range of 114.25 GHz to 300 GHz. The upper limit of FR5 corresponds to the upper limit of the EHF frequency band. Therefore, unless otherwise expressly stated herein, the term "below 6 GHz" may refer to a frequency less than 6 GHz, a frequency within FR1, or a frequency that may include mid-band frequencies. Further, unless otherwise expressly stated herein, the term "millimeter wave" or mmW refers to frequencies that may include mid-band frequencies, frequencies that may be within FR2-1, FR4, FR2-2 and / or FR5, or frequencies that may be within the EHF band.

[0034] The UE 102 and the base station 104 / RU 106 may each include multiple antennas. The multiple antennas may correspond to antenna elements, antenna panels, and / or antenna arrays that may facilitate beamforming operations. For example, the RU 106b transmits a downlink beamformed signal to the UE 102b based on a first beam set 132 in one or more transmission directions of the RU 106b. The UE 102b may receive the downlink beamformed signal from the RU 106b based on a second beam set 134b in one or more reception directions of the UE 102b. In a further example, the UE 102b may also transmit an uplink beamformed signal to the RU 106b based on the second beam set 134b in one or more transmission directions of the UE 102b. The RU 106b may receive the uplink beamformed signal from the UE 102b in one or more reception directions of the RU 106b. The UE 102b may perform beam training to determine the optimal reception and transmission directions of the beamformed signals. The transmission and reception directions of the UE 102 and the base station 104 / RU 106 may be the same or may be different. In a further example, the beamformed signals may be transmitted between the first base station 104c and the second base station 104b. For example, the RU 106a of cell 190a may transmit a beamformed signal to the base station 104c of cell 190e based on an RU beam set 136 in one or more transmission directions of the RU 106a. The base station 104c of cell 190e may receive the beamformed signal from the RU 106a based on a base station beam set 138 in one or more reception directions of the base station 104c. Similarly, the base station 104c of cell 190e may transmit a beamformed signal to the RU 106a based on the base station beam set 138 in one or more transmission directions of the base station 104c. The RU 106a may receive the beamformed signal from the base station 104c of cell 190e based on the RU beam set 136 in one or more reception directions of the RU 106a.

[0035] The base station 104 may include and / or be referred to as a network entity. That is, a "network entity" may refer to a base station 104 or at least one unit of the base station 104, such as a RU 106, a DU 108, and / or a CU 110. The base station 104 may also include and / or be referred to as a next generation evolved node B (ng-eNB), a generation NB (gNB), an evolved NB (eNB), an access point, a base station transceiver, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP, a network node, a network device, or other related terms. The base station 104 or an entity at the base station 104 may be implemented as an IAB node, a relay node, a side link node, an aggregated (integrated) base station having a RU 106 and a BBU including a DU 108 and a CU 110, or may be implemented as a decomposed base station 104b including one or more of the RU 106, the DU 108, and / or the CU 110. The set of aggregated or decomposed base stations 104a-104b may be referred to as a next generation radio access network (NG-RAN). In some examples, UE 102b operates in dual connectivity (DC) with base station 104a and base station 104b. In such a case, base station 104a may be a primary node, and base station 104b may be a secondary node. In other examples, UE 102b operates in DC with DU 108a and DU 108b. In such a case, DU 108a may be a primary node, and DU 108b may be a secondary node.

[0036] The core network 120 may include an access and mobility management function (AMF) 121, a session management function (SMF) 122, a user plane function (UPF) 123, a unified data management (UDM) 124, a gateway mobile location center (GMLC) 125, and / or a location management function (LMF) 126. The core network 120 may also include one or more location servers, which may include the GMLC 125 and the LMF 126, as well as other functional entities. For example, the one or more location servers include one or more location / positioning servers, which may include the GMLC 125 and the LMF 126 in addition to one or more of the positioning determination entity (PDE), the serving mobile location center (SMLC), the mobile positioning center (MPC), etc.

[0037] AMF 121 is a control node that handles signal transmission between UE 102 and core network 120. AMF 121 supports registration management, connection management, mobility management, and other functions. SMF 122 supports session management and other functions. UPF 123 supports packet routing, packet forwarding, and other functions. UDM 124 supports the generation of authentication and key agreement (AKA) credentials, user identity handling, access authorization, and subscription management. GMLC 125 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. LMF 126 receives measurement and assistance information from NG-RAN and UE 102 via AMF 121 to calculate the positioning of UE 102. NG-RAN can use one or more positioning methods to determine the location of UE 102. Positioning UE 102 can involve signal measurement, position estimation, and optional speed calculation based on measurement. Signal measurement can be performed by UE 102 and / or serving base station 104 / RU 106.

[0038] The transmitted signal may also be based on one or more of a satellite positioning system (SPS) 114, such as a signal measured for positioning. In an example, the SPS 114 of the cell 190c may communicate with one or more UEs 102, such as UE 102c, and one or more base stations 104 / RU 106, such as RU 106c. The SPS 114 may correspond to one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / positioning systems. The SPS 114 may be associated with LTE signals, NR signals (e.g., based on round trip time (RTT) and / or multiple RTT), wireless local area network (WLAN) signals, terrestrial beacon systems (TBS), sensor-based information, NR enhanced cell ID (NR E-CID) technology, downlink departure angle (DL-AoD), downlink arrival time difference (DL-TDOA), uplink arrival time difference (UL-TDOA), uplink arrival angle (UL-AoA), and / or other systems, signals, or sensors.

[0039] UE 102 may be configured as a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, a GPS, a multimedia device, a video device, a digital audio player (e.g., a Moving Picture Experts Group (MPEG) Audio Layer 3 (MP3) player), a camera, a game console, a tablet computer, a smart device, a wearable device, a vehicle, a utility meter, a gas pump, a home appliance, a healthcare device, a sensor / actuator, a display, or any other device with similar functionality. Some of UE 102 may be referred to as Internet of Things (IoT) devices, such as parking meters, gas pumps, home appliances, vehicles, healthcare equipment, etc. UE 102 may also be referred to as a station (STA), a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handheld device, a mobile client, a client, or other similar terms. The term UE may also apply to a roadside unit (RSU), which may communicate with other RSU UEs, non-RSU UEs, the base station 104, and / or entities at the base station 104, such as the RU 106.

[0040] Still refer to Figure 1A In certain aspects, the UE 102 may include a UE radar assistance component 140 configured to receive a configuration message from a radar transmitter that configures a radar receiver to assist the radar transmitter in bistatic radar sensing; receive reflections of radar signals; and in response to receiving the reflections of the radar signals, send a radar measurement report message to the radar transmitter.

[0041] In certain aspects, the base station 104 or a network entity of the base station 104 may include a radar assistance component 150 configured to receive a radar sensing request message from a radar transmitter, the radar sensing request message requesting a radar receiver to assist the radar transmitter in performing bistatic radar sensing; in response to the reception, send a physical downlink control channel (PDCCH) grant indicating radar resources to the radar transmitter; in response to receiving the PDCCH grant, receive a reflection of a radar signal reflected from an object via the radar resource; and in response to receiving the reflection of the radar signal, send a radar measurement report message to the radar transmitter.

[0042] therefore, Figure 1A A wireless communication system is described that can incorporate aspects of one or more of the other figures described herein—such as Figures 1B to 7Further, although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar fields, such as 5G-Advanced and future versions, LTE, LTE-Advanced (LTE-A), and other wireless technologies such as 6G.

[0043] Figure 1B to Figure 1C Example environments 170 and 180 are shown for implementing user equipment (UE) assisted radar processing according to some embodiments. The environments 170 and 180 include UEs 102 (eg, 102A, 102B) and a network entity 104.

[0044] refer to Figure 1B , the network entity 104 can be used as a radar transmitter to send a radar signal 172 for radar sensing. Radar sensing can be used to image the environment or determine information about an object 176 in the environment based on the distance, Doppler and / or angle information determined from the reflection 174 of the radar signal. The radar signal 172 includes a defined waveform, such as a frequency modulated continuous wave (FMCW), a pulse waveform, or a chirped waveform, and other examples of defined waveforms. Radar sensing can also be used for automotive radars, for example, to detect the environment around the vehicle, nearby vehicles or objects, and to detect information for smart cruise control, collision avoidance, etc. Radar signal sensing can also be used for gesture recognition, for example, human activity recognition, hand movement recognition, facial expression recognition, key detection, sign language detection, etc. Radar signal sensing can be used to obtain scene information, for example, position detection, tracking, determining direction, distance estimation, etc. Radar sensing can be used to image the environment, for example, to provide a 3-dimensional (3D) map for virtual reality (VR) or augmented reality (AR) applications. Radar devices can be used to provide high-resolution positioning, for example, for industrial Internet of Things (IoT) applications. The network entity 104 communicates with the UE 102 using an access link 178 (e.g., a wireless link) for control and / or data communications. For example, the network entity 104 communicates control information and downlink data to the UE 102. The UE 102 communicates control information and uplink data to the network entity 104. The downlink portion 178A of the access link 178 may be combined with the radar signal 172 to obtain a combined radar and communication signal.

[0045] UE 102 may function as a radar receiver to receive reflection 174 of a radar signal reflected from object 176. When UE 102 receives the combined radar and communication signal, UE 102 may demodulate and decode the communication portion of the signal to receive downlink information from network entity 104. In response to receiving reflection 174 of the radar signal, UE 102 transmits information about object 176 to network entity 104 using uplink portion 178B of access link 178. Upon receiving the information about object 176, network entity 104 compares the information about object 176 to radar signal 172 to determine the location of object 176.

[0046] refer to Figure 1C , a UE 102 in an environment 180 may function as a radar transmitter to send a radar signal 172 for radar sensing and possibly also for uplink communications. A network entity 104 communicates with the UE 102 using an access link 178 (e.g., a wireless link). The UE 102 may add uplink communication information to the radar signal 172 to obtain a combined radar and communication signal. The network entity 104 may demodulate and decode the communication portion of the received combined radar and communication signal. The network entity 104 may function as a radar receiver to receive a reflection 174 of a radar signal reflected from an object 176. In response to receiving the reflection 174 of the radar signal, the network entity 104 sends information about the object 176 to the UE 102 using the access link 178. After receiving the information about the object 176, the UE 102 compares the information about the object 176 with the radar signal 172 to determine the location of the object 176.

[0047] Therefore, a UE and / or network entity performing bistatic radar sensing can overcome limitations associated with conventional monostatic object detection techniques. Additionally, the UE and / or network entity can add communication information to the radar signal to obtain a combined radar and communication signal.

[0048] therefore, Figure 1B to Figure 1C Describes an example environment in which various aspects of UE-assisted radar sensing can be combined with aspects of one or more other figures described herein - such as Figures 2 to 7 to achieve the aspects shown in .

[0049] Figure 21 is a signal transmission diagram illustrating an example scenario 200 for radar sensing assistance according to some embodiments, wherein the network entity 104 (e.g., base station) acts as a radar transmitter and the UE 102 acts as a radar receiver. In general, the UE 102 and the network entity 104 perform bistatic radar sensing assistance based on a three-phase operation. The three-phase operation includes bistatic radar preparation 201, bistatic radar configuration and operation 203, and bistatic radar processing and reporting 205. The bistatic radar preparation 201 includes procedures 202, 204, 206, 208, and 221. The bistatic radar configuration and operation 203 includes procedures 210, 212, 213, 214, and 229. The bistatic radar processing and reporting 205 includes procedures 216, 218, 220, 219, and 222.

[0050] A radar receiver (e.g., UE 102) may receive 202 a radar capability query from a radar transmitter. For example, the UE 102 receives 202 a radar capability query message (e.g., ueCapabilityEnquiry message) from a network entity 104, the radar capability query message requesting transmission of UE radio access capabilities. In response to receiving the radar capability query or at the UE's own initiative, the radar receiver sends 204 a radar capability response to the radar transmitter, the radar capability response indicating radar capabilities for bistatic radar sensing supported by the radar receiver. For example, the UE 102 sends 204 a radar capability response message (e.g., UECapabilityInformation message) to the network entity 104, the radar capability response message transmitting the UE radar capabilities requested by the network entity 104. The radar capability response includes at least one indication of: a radar waveform parameter indicating a radar waveform that the radar receiver can detect; a minimum radar range resolution capability of the radar receiver; a minimum radar Doppler resolution; a first minimum delay between receipt of a physical downlink control channel (PDCCH) grant by the radar receiver and a first time the radar receiver performs radar reception; or a second minimum delay between receipt of the PDCCH grant and a second time the radar receiver performs a radar measurement report transmission.

[0051] The UE radar capability may also include a third minimum time delay between the reception of the PDCCH grant and the third time at which the radar receiver performs radar transmission. For example, the third minimum time delay may be in units of orthogonal frequency division multiplexing (OFDM) symbols, microseconds, etc. Figure 2 and Figure 3 , the third minimum time delay allows the UE to function as a radar receiver ( Figure 2 ) to switch to use as a radar transmitter ( Figure 3) to perform radar transmission 314. The UE 102 may decode the uplink (UL) PDCCH grant before transmitting the radar signal. The third minimum time delay allows the UE 102 sufficient time to decode the PDCCH grant. The third minimum time is different from the above-mentioned first minimum delay. In one example, when the UE 102 does not have the full-duplex capability to perform monostatic radar sensing, the UE 102 may send a request 206 to the network entity 104 to perform bistatic radar sensing. If the network entity 104 is available to perform bistatic radar sensing with the UE 102, the network entity 104 responds to the UE 102 with an acknowledgement 221.

[0052] The clock source stability determines the synchronization accuracy between the UE 102 and the network entity 104. For example, a high-performance crystal oscillator can enhance the synchronization accuracy between the UE 102 and the network entity 104. The radar capability response message may include a synchronization accuracy indication.

[0053] The UE radar capability also depends on the positioning capability of the UE 102. The positioning capability of the UE 102 can be determined by the UE radar resolution capability. The UE radar resolution capability may include angular resolution, range resolution, or Doppler resolution. The UE radar resolution capability may also include the detection range. To accurately perform radar sensing, the UE 102 may be configured with enhanced position resolution. For example, the enhanced position resolution may have a higher resolution than the Global Positioning System (GPS) resolution. In some other examples, positioning based on 5G or 6G networks (e.g., Observed Time Difference of Arrival (OTDOA), Angle of Arrival, Angle of Departure, etc.) may enable the UE 102 to be configured with enhanced position resolution. The radar capability response message may include one or more positioning accuracy indications.

[0054] The UE radar capability also depends on the local operating conditions of the UE 102. For example, the UE radar capability may be affected by the battery or thermal conditions of the UE 102. The radar capability response message may include a battery or thermal condition indication.

[0055] The radar transmitter determines 208 to perform the radar sensing assistance procedure 201 on the radar receiver. For example, based on the UE radar capability reported 204 in the radar capability response message, the network entity 104 determines 208 to perform radar sensing assistance on the UE 102.

[0056] To configure the radar receiver for the radar sensing assistance procedure, the radar transmitter sends 210 a configuration message to the radar receiver. For example, the UE 102 receives an RRC message (e.g., an RRCReconfiguration message) from the network entity 104. The RRCReconfiguration message may include a new information element (e.g., RadarAssistanceMeasurementConfiguration) to indicate a request for radar sensing assistance. After the radar receiver receives 210 the configuration message from the radar transmitter, the configuration message configures the radar receiver to assist the radar transmitter in bistatic radar sensing. For example, the configuration message configures the UE 102 to perform bistatic radar sensing.

[0057] The radar receiver may be one of a group of radar receivers. If so, the radar transmitter may define a group identifier (ID) for the group of radar receivers. For example, the network entity 104 includes the group ID in the configuration message for identifying a group of UEs.

[0058] In the group case, the radar receiver receives 212 a PDCCH grant indicating radar resources. The radar receiver may receive downlink control information (DCI) from the radar transmitter, the downlink control information indicating at least one indicator of: downlink frequency resources; downlink timing resources; or radar waveform. The DCI also indicates uplink resources for sending radar measurement report messages. The radar transmitter may scramble a cyclic redundancy check (CRC) of the PDCCH grant using the group ID.

[0059] The radar receiver may reject 213 the configuration message with an indication that the radar receiver will not perform radar sensing assistance. If the radar receiver rejects 213 the configuration message, the radar receiver may send a rejection message 229. If the radar receiver does not reject 213 the configuration message, the radar receiver continues to assist the radar transmitter in performing bistatic radar sensing.

[0060] In response to receiving the PDCCH grant, the radar transmitter and the radar receiver perform bistatic radar sensing. For example, the network entity 104 sends 214 a radar signal 172 into the air. The radar signal in this example includes an orthogonal frequency division multiplexing (OFDM) radar signal. In other examples, the radar signal 172 may include a frequency modulated continuous wave (FMCW) radar signal or a pulsed radar signal. During bistatic radar sensing, the radar signal 172 travels through the air and may strike an object (e.g., 176).

[0061] When radar signal 172 strikes object 176, radar signal 172 may change, and the radar signal is reflected as reflection 174 of the radar signal. The radar receiver receives reflection 174 of the radar signal reflected from object 176. For example, reflection 174 of the radar signal may include information about object 176. In response to receiving the reflection of the radar signal, the radar receiver processes 216 the reflection of the radar signal. For example, UE 102 processes reflection 174 of the radar signal. By doing so, UE 102 may detect object 176 and determine information about object 176 (e.g., object information).

[0062] The radar receiver then sends a radar measurement report message 218 to the radar transmitter. The radar measurement report message may include information about the object 176 (e.g., object information). The object information may include location information or size information. The radar transmitter may use the object information to calculate 220 the distance of the object 176 to determine the location of the object 176. In some examples, the radar transmitter may use the object information to determine the presence or movement of the object 176, the speed of the object 176, the spacing between the radar transmitter and the object 176, the spacing between the radar receiver and the object 176, the direction of movement of the object, and the elevation angle, the size of the object 176, and the material composition of the object 176. In some other examples, the radar measurement report message may include at least one indication of the following: Doppler velocity, Doppler spread, Doppler frequency shift, or radar signal propagation delay information. After the radar transmitter calculates 220 the distance of the object 176 to determine the location of the object 176, the radar transmitter may send 222 the object information to the radar receiver. In some examples, the radar receiver sends 219 a request message to the radar transmitter requesting the radar transmitter to send 222 the object information after the radar transmitter determines the object information from reflections of the radar signal.

[0063] The radar receiver may send 226 a first message to the radar transmitter indicating that the radar receiver is not available for radar sensing assistance. In response to sending the first message, the radar receiver may receive 228 a second message from the radar transmitter to ignore the radar assistance request. For example, the UE 102 receives an RRC message to ignore the configuration message as described above.

[0064] Because the radar receiver detects 224 a condition of the radar receiver, the radar receiver may send 226 a first message indicating that the radar receiver is not available for radar sensing assistance. For example, when a sensor of the UE 102 detects a local condition of the UE 102, the UE 102 sends a first message indicating that the UE 102 is not available for performing radar sensing assistance for the network entity 104. The local condition of the UE 102 may include a battery charge condition, a thermal condition, a processing capacity, an available memory. The UE 102 may send the first message if the battery charge, the processing capacity, or the available memory is below a certain threshold. Additionally or alternatively, the UE may send the first message if the temperature of the UE exceeds a certain temperature range due to overheating. Figure 2 An example scenario 200 is described in which a network entity is configured as a radar transmitter and a UE is configured as a radar receiver for radar sensing assistance, and Figure 3 Another example scenario 300 is described in which a UE is configured as a radar transmitter and a network entity is configured as a radar receiver for radar awareness assistance.

[0065] Figure 3 3 is a signal transmission diagram illustrating an example scenario 300 according to some embodiments, where UE 102 acts as a radar transmitter and network entity 104 acts as a radar receiver. Example scenario 300 may be accomplished by Figure 1A to Figure 1B The UE 102 depicted in FIG. 1 communicates with the network entity 104 to achieve this.

[0066] refer to Figure 3 In general, UE 102 and network entity 104 perform bistatic radar sensing assistance based on a three-stage operation. The three-stage operation includes bistatic radar preparation 301, bistatic radar configuration and operation 303, and bistatic radar processing and reporting 305. Bistatic radar preparation 301 includes procedures 202, 204, and 308. Bistatic radar configuration and operation 303 includes procedures 306, 307, and 312. Bistatic radar processing and reporting 305 includes procedures 217, 314, 318, and 320. Procedures 202, 204, 308, 312 may be similar to Figure 2Procedures 202, 204, 208, 212 of the present invention. In some aspects, the radar transmitter may send a radar sensing request message to the radar receiver, the radar sensing request message requesting the radar receiver to assist the radar transmitter in performing bistatic radar sensing. For example, if the UE 102 determines to perform radar sensing, the UE 102 sends 306 a radar sensing request message requesting the network entity 104 to assist the network entity 104 in performing bistatic radar sensing. In response to the sending 306, the radar transmitter receives 212 a physical downlink control channel (PDCCH) grant indicating radar resources from the radar receiver. For example, the UE 102 receives 212 a PDCCH grant indicating radar resources from the network entity 104. In response to the reception, the radar transmitter sends 314 a radar signal toward the area of ​​interest using the radar resources. In response to receiving a reflection of the radar signal, the radar receiver processes 217 the reflection of the radar signal. For example, the network entity 104 processes the reflection 174 of the radar signal. By doing so, the network entity 104 can determine information about the object 176 (e.g., object information). Thereafter, in response to transmitting the radar signal, the radar transmitter receives 318 a radar measurement report message from the radar receiver. After the radar transmitter receives 318 the radar measurement report message, the radar transmitter may calculate 320 a distance to object 176 to determine a position of object 176.

[0067] Figures 2 to 3 Bistatic radar sensing at a radar receiver and bistatic radar sensing at a radar transmitter are shown. Figures 4 to 5 Shown is the method for implementing Figures 2 to 3 Specifically, Figure 4 The radar receiver Figures 2 to 3 Implementation of one or more aspects. Figure 5 The radar transmitter Figures 2 to 3 Implementation of one or more aspects.

[0068] Figure 4 1 to 2 are flowcharts depicting an example method implemented at a radar receiver to perform radar sensing assistance. Figure 3 and Figure 6 to Figure 7 , the method may be performed by a radar receiver (e.g., UE 102), UE equipment 602, etc., which may include a memory 626' and may correspond to the entire UE 102 or UE equipment 602, or a component of the UE 102 or UE equipment 602, such as a wireless baseband processor 626 and / or an application processor 606. In a further example, the network entity 104 may be a radar receiver.

[0069] The radar receiver may receive 402 a radar capability query from a radar transmitter. Figure 2 For example, the UE 102 receives 202 a radar capability query message (eg, a ueCapabilityEnquiry message) from the network entity 104, the radar capability query message requesting transmission of UE radio access capabilities.

[0070] In response to receiving 402 the radar capability query, the radar receiver may send 404 a radar capability response to the radar transmitter, the radar capability response indicating radar capabilities supported by the radar receiver for bistatic radar sensing. Figure 2 For example, the UE 102 sends 204 a radar capability response message (eg, a UECapabilityInformation message) to the network entity 104 , the radar capability response message transmitting the UE radar capabilities requested by the network entity 104 .

[0071] The radar receiver receives 410 a configuration message from the radar transmitter. Figure 2 For example, the UE 102 receives 210 an RRC message (eg, an RRCReconfiguration message) from the network entity 104. The RRCReconfiguration message may include a new information element (eg, RadarAssistanceMeasurementConfiguration) to indicate a request for radar sensing assistance.

[0072] In response to receiving the PDCCH grant, the radar transmitter transmits 414 a radar signal. For example, the network entity transmits 214 the radar signal 172 into the air, and the radar receiver receives 214 the radar signal.

[0073] The radar receiver then sends a radar measurement report message 418 to the radar transmitter. Figure 2 , the UE 102 sends 218 a radar measurement report message to the network entity 104 , the radar measurement report message including information about the object 176 (eg, object information).

[0074] The radar receiver may send 419 a request message to the radar transmitter requesting the radar transmitter to send the object information after the radar transmitter determines the object information from the reflection of the radar signal. Figure 2 , the UE 102 sends 219 a request message to the network entity 104, the request message requesting the network entity 104 to send the object information after the network entity 104 determines 220 the object information from the reflections of the radar signal.

[0075] The radar receiver may detect 424 a condition of the radar receiver that causes the radar receiver to be unavailable for radar sensing assistance. For example, the UE 102 uses various sensors (e.g., 618) to detect a local condition (battery charge or thermal condition) of the UE 102. After detecting the local condition, the UE 102 is unavailable for performing radar sensing assistance for the network entity 104.

[0076] In response to detecting the condition, the radar receiver may send 425 a message to the radar transmitter indicating that the radar receiver is available to perform radar sensing assistance. Figure 2 , when UE 102 detects 224 a local condition to UE 102 , UE 102 226 sends a message indicating that UE 102 is not available to perform radar sensing assistance to network entity 104 .

[0077] The radar receiver may send 426 a first message to the radar transmitter indicating that the radar receiver is not available for radar sensing assistance. Figure 2 , the UE 102 sends 226 a first message to the network entity 104, the first message indicating that the UE 102 is not available for radar sensing assistance.

[0078] In response to sending the first message, the radar receiver may receive 428 a second message from the radar transmitter to ignore the radar assistance request. Figure 2 , the UE 102 receives 228 a second message from the network entity 104 to ignore the configuration message as described above.

[0079] The radar receiver may receive 412 downlink control information (DCI) from the radar transmitter, the downlink control information indicating at least one indicator of: downlink frequency resources; downlink timing resources; or radar waveform. Figure 2 , the UE 102 receives 212 a PDCCH grant indicating radar resources from a network entity.

[0080] In response to receiving the configuration message, the radar receiver may reject 413 the configuration message with an indication that the radar receiver will not perform radar sensing assistance. Figure 2 , UE 102 rejects 213 the configuration message with an indication that UE 102 will not perform radar sensing assistance. If UE 102 rejects 213 the configuration message, UE 102 sends a rejection message 229. If UE 102 does not reject 213 the configuration message, UE 102 continues to assist network entity 104 in performing bistatic radar sensing.

[0081] The radar receiver may send 406 a radar sensing request message to the radar transmitter for requesting radar sensing assistance. Figure 2, UE 102 sends a radar sensing request message to network entity 104 , the radar sensing request message indicating a request for radar sensing assistance from network entity 104 . Figure 4 A method for radar sensing assistance from the radar receiver side is described, and Figure 5 A method for radar sensing assistance from the radar transmitter side is described.

[0082] Figure 5 1 to 2 are flowcharts depicting an example method for performing radar sensing assistance implemented in a radar transmitter. Figure 3 11 , the method may be performed by a network entity 104, such as a base station or a unit of a base station, which may correspond to a RU processor 706, a DU processor 726, a CU processor 746, etc. One or more network entities 104 may include a memory 706' / 726' / 746', which may correspond to the entirety of one or more network entities 104, or a component of one or more network entities 104, such as a RU processor 706, a DU processor 726, or a CU processor 746. In a further example, the UE 102 may be a radar transmitter.

[0083] In method 500 , a radar transmitter may receive 502 a radar capability query from a radar receiver. Figure 2 For example, the UE 102 receives 202 a radar capability query message (eg, a ueCapabilityEnquiry message) from the network entity 104, the radar capability query message requesting transmission of UE radio access capabilities.

[0084] In response to the radar capability query, the radar transmitter may send 504 a radar capability response to the radar receiver, the radar capability response indicating radar capabilities supported by the radar transmitter for bistatic radar sensing. Figure 2 For example, the UE 102 sends 204 a radar capability response message (eg, a UECapabilityInformation message) to the network entity 104 , the radar capability response message transmitting the UE radar capability requested by the network entity 104 .

[0085] The radar transmitter sends 506 a radar sensing request message to the radar receiver, the radar sensing request message requesting the radar receiver to assist the radar transmitter in performing bistatic radar sensing. Figure 2 For example, the UE 102 sends 206 a radar sensing request message to the network entity 104, wherein the radar sensing request message requests the network entity 104 to assist the UE 102 in performing bistatic radar sensing.

[0086] In response to the transmission, the radar transmitter receives 512 a physical downlink control channel (PDCCH) grant from the radar receiver indicating radar resources. For example, the UE 102 receives 212 a PDCCH grant from the network entity 104 indicating radar resources.

[0087] The radar transmitter transmits 514 a radar signal toward the area of ​​interest using the radar resource. Figure 3 , for example, UE 102 transmits 314 radar signal 172 into the air, and network entity 104 receives 214 the radar signal.

[0088] In response to transmitting the radar signal, the radar transmitter receives 518 a radar measurement report message from the radar receiver. Figure 3 , for example, in response to sending the radar signal, the UE receives 318 a radar measurement report message from the network entity 104 .

[0089] The radar transmitter receives 513 an acknowledgement message from the radar receiver, the acknowledgement message instructing the radar receiver to assist the radar transmitter in bistatic radar sensing. Figure 3 For example, the UE 102 receives 307 a radar sensing response message from the network entity 104, the radar sensing response message instructing the UE 102 to assist the network entity 104 in performing bistatic radar sensing.

[0090] The radar transmitter receives 512 downlink control information (DCI) indicating radar resources from the radar receiver. Figure 3 , for example, UE 102 receives 312 DCI from network entity 104 indicating radar resources.

[0091] like Figure 6 As described in the foregoing, the UE equipment 600 may operate as a radar transmitter or a radar receiver and may perform the methods of the flowcharts 400 and 500. Figure 7 As described in , one or more network entities 104 may also operate as a radar transmitter or a radar receiver and may also perform the methods of flowcharts 400 and 500 .

[0092] Figure 6600 is a diagram showing an example of a hardware implementation for a UE device 602. The UE device 602 may be a UE 102, a component of a UE 102, or may implement UE functionality. The UE device 602 may include an application processor 606, which may have an on-chip memory 606'. In an example, the application processor 606 may be coupled to a secure digital (SD) card 608 and / or a display 610. The application processor 606 may also be coupled to a sensor module 612, a power supply 614, an additional memory module 616, a camera 618, and / or other related components. For example, the sensor module 612 may control a barometric pressure sensor / altimeter, a motion sensor (such as an inertial management unit (IMU)), a gyroscope, an accelerometer, a light detection and ranging (LIDAR) device, a radio-aided detection and ranging (RADAR) device, a sound navigation and ranging (SONAR) device, a magnetometer, an audio device, and / or other technologies for positioning.

[0093] The UE equipment 602 may further include a wireless baseband processor 626, which may be referred to as a modem. The wireless baseband processor 626 may have an on-chip memory 626'. Together with and similar to the application processor 606, the wireless baseband processor 626 may also be coupled to a sensor module 612, a power supply 614, an additional memory module 616, a camera 618, and / or other related components. The wireless baseband processor 626 may additionally be coupled to one or more subscriber identity modules (SIM) cards 620 and / or one or more transceivers 630 (e.g., wireless RF transceivers).

[0094] Within one or more transceivers 630, the UE equipment 602 may include a Bluetooth module 632, a WLAN module 634, an SPS module 636 (e.g., a GNSS module), and / or a cellular module 638. The Bluetooth module 632, the WLAN module 634, the SPS module 636, and the cellular module 638 may each include an on-chip transceiver (TRX), or in some cases, include only a transmitter (TX) or only a receiver (RX). The Bluetooth module 632, the WLAN module 634, the SPS module 636, and the cellular module 638 may each include a dedicated antenna and / or utilize an antenna 640 to communicate with one or more other nodes. For example, the UE equipment 602 may communicate with another UE 102 (e.g., side link communication) and / or communicate with a network entity 104 (e.g., uplink / downlink communication) via an antenna 640 through the transceiver 630, where the network entity 104 may correspond to a base station or a unit of a base station, such as RU106, DU 108, or CU 110.

[0095] The wireless baseband processor 626 and the application processor 606 may each include a computer-readable medium / memory 626', 606', respectively. The additional memory module 616 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 626', 606', 616 may be non-temporary. The wireless baseband processor 626 and the application processor 606 may each be responsible for general processing, including executing software stored on the computer-readable medium / memory 626', 606', 616. The software, when executed by the wireless baseband processor 626 / application processor 606, enables the wireless baseband processor 626 / application processor 606 to perform various functions described herein. The computer-readable medium / memory may also be used to store data manipulated by the wireless baseband processor 626 / application processor 606 when executing the software. The wireless baseband processor 626 / application processor 606 may be a component of the UE 102. The UE equipment 602 may be a processor chip (e.g., a modem and / or application) and includes only the wireless baseband processor 626 and / or the application processor 606. In other examples, the UE equipment 602 can be the entire UE 102 and include additional modules of the equipment 602.

[0096] As discussed, the UE radar assistance component 140 is configured to receive a configuration message from a radar transmitter that configures the radar receiver to assist the radar transmitter in bistatic radar sensing; receive reflections of radar signals; and send a radar measurement report message to the radar transmitter in response to receiving reflections of radar signals. The UE radar assistance component 140 may be located within the wireless baseband processor 626, the application processor 606, or both the wireless baseband processor 626 and the application processor 606. The UE radar assistance component 140 may be one or more hardware components explicitly configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof.

[0097] As shown, the equipment 600 may include various components configured for various functions. In one configuration, the equipment 600, and in particular the wireless baseband processor 626 and / or the application processor 606, includes: a component for receiving a configuration message from a radar transmitter, the configuration message configuring the radar receiver to assist the radar transmitter in bistatic radar sensing; a component for receiving a reflection of a radar signal; and a component for sending a radar measurement report message to the radar transmitter in response to receiving the reflection of the radar signal. The equipment 600 further includes: a component for receiving a radar capability query from the radar transmitter; and a component for sending a radar capability response to the radar transmitter in response to the radar capability query, the radar capability response indicating the radar capability supported by the radar receiver for bistatic radar sensing. The component may be a UE radar assistance component 140 of the equipment 600 configured to perform the functions described by the component.

[0098] Figure 7 700 is a diagram illustrating an example of a hardware implementation of one or more network entities 104. One or more network entities 104 may be a base station, a component of a base station, or may implement base station functionality. One or more network entities 104 may include or may correspond to at least one of a RU 106, a DU 108, or a CU 110. The CU 110 may include a CU processor 746, which may have an on-chip memory 746'. In some aspects, the CU 110 may further include an additional memory module 756 and / or a communication interface 748, both of which may be coupled to the CU processor 746. The CU 110 may communicate with the DU 108 via a midhaul link 162, such as an F1 interface between the communication interface 748 of the CU 110 and the communication interface 728 of the DU 108.

[0099] The DU 108 may include a DU processor 726, which may have an on-chip memory 726'. In some aspects, the DU 108 may further include an additional memory module 736 and / or a communication interface 728, both of which may be coupled to the DU processor 726. The DU 108 may communicate with the RU 106 via a fronthaul link 160 between the communication interface 728 of the DU 108 and the communication interface 708 of the RU 106.

[0100] The RU 106 may include a RU processor 706, which may have an on-chip memory 706'. In some aspects, the RU 106 may further include an additional memory module 716, a communication interface 708, and one or more transceivers 730, all of which may be coupled to the RU processor 706. The RU 106 may further include antennas 740, which may be coupled to the one or more transceivers 730, such that the RU 106 may communicate with the UE 102 via the antennas 740 through the one or more transceivers 730.

[0101] On-chip memory 706 ', 726 ', 746 'and additional memory modules 716, 736, 756 can each be considered as a computer-readable medium / memory. Each computer-readable medium / memory can be non-temporary. Each of the processors 706, 726, 746 is responsible for general processing, including executing software stored on the computer-readable medium / memory. The software, when executed by the corresponding processor 706, 726, 746, enables the processor 706, 726, 746 to perform various functions described herein. The computer-readable medium / memory can also be used to store data manipulated by the processor 706, 726, 746 when executing the software. In an example, the BS radar auxiliary component 150 can be located at one or more network entities 104, such as at the CU 110; at both the CU 110 and the DU 108; at each of the CU 110, DU 108 and RU 106; at the DU 108; at both the DU 108 and the RU 106; or at the RU 106.

[0102] As discussed, the BS radar assistance component 150 is configured to receive a radar sensing request message from a radar transmitter, the radar sensing request message requesting the radar receiver to assist the radar transmitter in bistatic radar sensing; in response to receiving, send a physical downlink control channel (PDCCH) grant indicating a radar resource to the radar transmitter; in response to receiving the PDCCH grant, receive a reflection of a radar signal reflected from an object via the radar resource; and in response to receiving the reflection of the radar signal, send a radar measurement report message to the radar transmitter. The BS radar assistance component 150 may be located within one or more processors of one or more of the CU 110, DU 108, and RU 106. The BS radar assistance component 150 may be one or more hardware components explicitly configured to execute the process / algorithm, implemented by one or more processors configured to execute the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof.

[0103] One or more network entities 104 may include various components configured for various functions. In one configuration, one or more network entities 104 include: a component for receiving a radar sensing request message from a radar transmitter, the radar sensing request message requesting a radar receiver to assist the radar transmitter in bistatic radar sensing; in response to receiving, a component for sending a physical downlink control channel (PDCCH) grant indicating radar resources to the radar transmitter; in response to receiving the PDCCH grant, a component for receiving a reflection of a radar signal reflected from an object via the radar resource; and in response to receiving the reflection of the radar signal, a component for sending a radar measurement report message to the radar transmitter. The component may be a BS radar assistance component 150 of the one or more network entities 104 configured to perform the functions recited by the component.

[0104] The specific order or hierarchy of the boxes in the process and flow chart disclosed herein is an illustration of an example method. Therefore, the specific order or hierarchy of the boxes in the process and flow chart can be rearranged. Some boxes can also be merged or deleted. Dashed lines can represent optional elements of the diagram. The attached method claims present elements of each box in an example order and are not limited to the specific order or hierarchy presented in the claims, process and flow chart.

[0105] The detailed description set forth herein describes various configurations in conjunction with the accompanying drawings, but does not represent the only configuration in which the concepts described herein can be practiced. The detailed description includes specific details for providing a comprehensive explanation of the various concepts. However, these concepts can be practiced without using these specific details. In some cases, well-known structures and components are shown in block diagram form in order to avoid blurring such concepts.

[0106] Various aspects of wireless communication systems (such as telecommunication systems) are presented with reference to various equipment and methods. These equipment and methods are described in the detailed description that follows and are illustrated in the accompanying drawings by various blocks, components, circuits, processes, call flows, systems, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and design constraints imposed on the overall system.

[0107] Elements, or any part of elements or any combination of elements can be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other similar hardware configured to perform various functions described throughout this disclosure. One or more processors in a processing system can execute software, which can be referred to as software, firmware, middleware, microcode, hardware description language, or other. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, processes, functions, or any combination thereof.

[0108] If the functions described herein are implemented in software, the functions may be stored on a computer-readable medium (such as a non-transitory computer-readable storage medium) or encoded as one or more instructions or codes on the computer-readable medium. Computer-readable media include computer storage media and may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of computer-accessible instructions or data structures. The storage medium can be any available medium that is accessible to a computer.

[0109] The aspects, implementations, and / or use cases described herein may be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, the aspects, implementations, and / or use cases may be generated via integrated chip implementations and other non-module component-based devices such as end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / procurement devices, medical devices, artificial intelligence (AI)-enabled devices, machine learning (ML)-enabled devices, and the like. The aspects, implementations, and / or use cases may range from chip-level or modular components to non-modular or non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more of the techniques described herein.

[0110] Devices incorporating the various aspects and features described herein may also include additional components and features for implementing and practicing the various aspects and features claimed and described. For example, the transmission and reception of wireless signals necessarily include many components for analog and digital purposes, such as hardware components, antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc. The techniques described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc., in various configurations.

[0111] The description herein is provided to enable those skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be interpreted in view of the full scope of the disclosure consistent with the language of the claims.

[0112] Unless explicitly stated, references to singular elements do not mean "one and only one", but "one or more". Terms such as "if", "when ..." and "at ..." do not mean an immediate time relationship or reaction. That is, phrases such as "when ..." do not mean an immediate action in response to the occurrence of an action or during the occurrence of an action, but only mean that if a certain condition is met, a certain action will occur, but no specific or immediate time constraints are required for the occurrence of the action. Unless explicitly stated otherwise, the term "some" refers to one or more. Combinations such as "at least one of A, B or C" or "one or more of A, B or C" include any combination of A, B and / or C, such as A and B, A and C, B and C, or A and B and C, and may include multiple A, multiple B and / or multiple C, or may include only A, only B or only C. A set should be interpreted as an element set in which the number of elements is one or more.

[0113] Unless expressly indicated otherwise, ordinal terms such as "first" and "second" do not necessarily imply an order in time, sequence, value, etc., but are used to distinguish different instances of the term or phrase following each ordinal term.

[0114] The structural equivalents and functional equivalents of the elements of various aspects described in the entire disclosure known or later learned by those of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. The words "module", "mechanism", "element", "device", etc. may not be substitutes for the word "component". Therefore, unless the phrase "component for ..." is used to clearly state the claim element, any claim element shall not be interpreted as a means plus function. As used herein, the phrase "based on" should not be interpreted as a reference to a closed information set, one or more conditions, one or more factors, etc. In other words, unless clearly stated differently, the phrase "based on A" (where "A" can be information, conditions, factors, etc.) should be interpreted as "at least based on A".

[0115] The following examples are merely illustrative and may be combined with other examples or teachings described herein without limitation.

[0116] Example 1 is a method for performing radar sensing assistance at a radar receiver, comprising: receiving a configuration message from a radar transmitter, the configuration message configuring the radar receiver to assist the radar transmitter in bistatic radar sensing; receiving reflections of a radar signal sent by the radar transmitter; and sending a radar measurement report message to the radar transmitter in response to receiving the reflections of the radar signal.

[0117] Example 2 may be combined with Example 1 and further include: receiving a radar capability query from a radar transmitter; and in response to the radar capability query, sending a radar capability response to the radar transmitter, the radar capability response indicating radar capabilities for bistatic radar sensing supported by the radar receiver.

[0118] Example 3 may be combined with Examples 1 to 2, and further include: sending a request message to the radar transmitter, the request message requesting the radar transmitter to send the object information after the radar transmitter determines the object information from the radar measurement report message.

[0119] Example 4 may be combined with Examples 1 to 3, and include: the object information includes object position information or object size information.

[0120] Example 5 may be combined with Examples 1 to 4 and further include: sending a first message to a radar transmitter indicating that the radar receiver is not available for radar sensing assistance; and in response to sending the first message, receiving a second message from the radar transmitter to ignore the radar assistance request.

[0121] Example 6 may be combined with Examples 1 to 5, and include sending the first message being caused by detecting a condition of the radar receiver indicating that the radar receiver is unavailable for radar sensing assistance.

[0122] Example 7 may be combined with Examples 5 to 6, and include: the condition of the radar receiver is: a temperature condition, or a battery condition.

[0123] Example 8 may be combined with Examples 1 to 7, and include: receiving the configuration message includes: receiving the configuration message via a radio resource control (RRC) message.

[0124] Example 9 may be combined with Examples 1 to 8, and include: the radar receiver is one radar receiver among a plurality of radar receivers, and the configuration message includes a group identifier (ID) for identifying the plurality of radar receivers.

[0125] Example 10 can be combined with Examples 1 to 9 and further include: before receiving the reflection, receiving downlink control information (DCI) from the radar transmitter, the downlink control information indicating at least one indicator of: downlink frequency resources for radar signals; downlink timing resources for radar signals; or radar waveform.

[0126] Example 11 can be combined with Example 10 and include: the DCI also indicates uplink resources used to send the radar measurement report message.

[0127] Example 12 may be combined with Examples 1 to 11, and further include, in response to receiving the configuration message, rejecting the configuration message with an indication that the radar receiver will not perform radar sensing assistance.

[0128] Example 13 may be combined with Examples 1 to 12, and further: sending a radar sensing request message for requesting radar sensing assistance to the radar transmitter.

[0129] Example 14 may be combined with Examples 1 to 13, and include: the radar transmitter is a network entity, and the radar receiver is a user equipment (UE).

[0130] Example 15 is a method for assisting radar sensing at a radar transmitter, comprising: sending a configuration message to a radar receiver, the configuration message being used to configure the radar receiver to assist the radar transmitter in bistatic radar sensing; sending a radar signal toward an area of ​​interest; and receiving a radar measurement report message from the radar receiver in response to sending the radar signal.

[0131] Example 16 is a method for performing radar sensing assistance at a radar transmitter, comprising: sending a radar sensing request message to a radar receiver, the radar sensing request message requesting the radar receiver to assist the radar transmitter in performing bistatic radar sensing; in response to the sending, receiving a physical downlink control channel (PDCCH) authorization indicating radar transmission resources from the radar receiver; in response to the receiving, sending a radar signal toward an area of ​​interest using the radar transmission resources; and in response to sending the radar signal, receiving a radar measurement report message from the radar receiver.

[0132] Example 17 may be combined with Example 16 and further include: receiving a radar capability query from a radar receiver; and in response to the radar capability query, sending a radar capability response to the radar receiver, the radar capability response indicating radar capabilities for bistatic radar sensing supported by the radar transmitter.

[0133] Example 18 may be combined with Example 17, and further: in response to sending the radar sensing request message, receiving a radar sensing response message from the radar receiver, the radar sensing response message indicating that the radar receiver will assist the radar transmitter in bistatic radar sensing.

[0134] Example 19 can be combined with Examples 2, 18 to 20, and include: the radar capability response includes at least one indication of: a radar waveform parameter indicating a radar waveform that the radar transmitter is capable of detecting; a minimum radar range resolution capability of the radar transmitter; a minimum radar Doppler resolution; a first minimum delay between reception of a PDCCH authorization by the radar transmitter and a first time the radar transmitter is configured to receive a reflection; or a second minimum delay between reception of a PDCCH authorization and a second time the radar transmitter is configured to send a measurement report message.

[0135] Example 20 may be combined with Examples 16 to 19, and further include: receiving the PDCCH grant includes receiving downlink control information (DCI) indicating radar transmission resources.

[0136] Example 21 can be combined with Examples 16 to 20 and include: the PDCCH grant includes at least one indicator of: downlink frequency resources for radar signals; downlink timing resources for radar signals; or a radar waveform.

[0137] Example 22 can be combined with Examples 16 to 21, and includes: the PDCCH grant indicates uplink resources for transmission of the radar measurement report message.

[0138] Example 23 can be combined with Examples 1 to 13 or 16 to 22, and includes: the radar measurement report message includes at least one indication of: Doppler velocity, Doppler spread, Doppler frequency shift, or radar signal propagation delay information.

[0139] Example 24 may be combined with Examples 17 to 23, and include: the radar transmitter is a user equipment (UE), and the radar receiver is a network entity.

[0140] Example 25 is a method for performing radar sensing assistance at a radar receiver, comprising: receiving a radar sensing request message from a radar transmitter, the radar sensing request message requesting the radar receiver to assist the radar transmitter in performing bistatic radar sensing; in response to the reception, sending a physical downlink control channel (PDCCH) authorization indicating radar resources to the radar transmitter; in response to receiving the PDCCH authorization, receiving a reflection of a radar signal sent by the radar transmitter; and in response to receiving the reflection of the radar signal, sending a radar measurement report message to the radar transmitter.

[0141] Example 26 can be combined with any of the preceding examples and include: the radar signal is an orthogonal frequency division multiplexing (OFDM) radar signal, a frequency modulated continuous wave (FMCW) radar signal, or a pulse radar signal.

[0142] Example 27 can be combined with any of the preceding examples, and includes: the radar signal includes a communication component, and the radar receiver demodulates and decodes the communication component.

[0143] Example 28 is an apparatus for wireless communication, comprising a memory and a processor coupled to the memory, and configured to implement the method as described in any one of claims 1-27.

[0144] Example 29 is a non-transitory computer readable medium storing computer executable code, which, when executed by a processor, causes the processor to implement the method of any one of claims 1-27.

Claims

1. A method for radar sensing assistance at a radar receiver, include: receiving a configuration message from a radar transmitter, the configuration message configuring the radar receiver to assist the radar transmitter in bistatic radar sensing; receiving reflections of radar signals transmitted by the radar transmitter; as well as In response to the receiving the reflection of the radar signal, a radar measurement report message is sent to the radar transmitter.

2. The method of claim 1, further comprising: include: receiving a radar capability query from the radar transmitter; as well as In response to the radar capability query, a radar capability response is sent to the radar transmitter, the radar capability response indicating radar capabilities supported by the radar receiver for the bistatic radar sensing.

3. The method according to any one of claims 1 to 2, further comprising: include: A request message is sent to the radar transmitter, the request message requesting the radar transmitter to send object information after the radar transmitter determines the object information from the radar measurement report message.

4. The method according to any one of claims 1 to 3, further comprising: include: sending a first message to the radar transmitter, the first message indicating that the radar receiver is unavailable for the radar sensing assistance; as well as In response to the sending the first message, a second message is received from the radar transmitter to ignore a radar assistance request.

5. The method according to any one of claims 1 to 4, in, Sending the first message is caused by detecting a condition of the radar receiver indicating that the radar receiver is unavailable for the radar sensing assistance.

6. The method according to any one of claims 4 to 5, in, The condition of the radar receiver is: Temperature conditions, or Battery condition.

7. The method according to any one of claims 1 to 6, in, The radar receiver is one of a plurality of radar receivers, and wherein the configuration message includes a group identifier (ID) for identifying the plurality of radar receivers.

8. The method according to any one of claims 1 to 7, further comprising: include: Prior to receiving the reflection, receiving downlink control information DCI from the radar transmitter, the DCI indicating at least one indicator of: downlink frequency resources for said radar signal; downlink timing resources for said radar signal; or Radar waveform.

9. The method according to claim 8, in, The DCI also indicates uplink resources used to send the radar measurement report message.

10. The method according to any one of claims 1 to 9, further comprising: include: In response to said receiving the configuration message, rejecting the configuration message with an indication that the radar receiver is not to perform the radar sensing assistance.

11. The method according to any one of claims 1 to 10, further comprising: include: A radar sensing request message for requesting the radar sensing assistance is sent to the radar transmitter.

12. The method of claim 2, in, The radar capability response includes at least one indication of: a radar waveform parameter indicating a radar waveform that the radar transmitter is capable of detecting; the minimum radar range resolution capability of the radar transmitter; Minimum radar Doppler resolution; a first minimum delay between receipt of the PDCCH grant by the radar transmitter and a first time the radar transmitter is configured to receive the reflection; or A second minimum delay between the receipt of the PDCCH grant and a second time at which the radar transmitter is configured to send the measurement report message.

13. A method of performing radar sensing assistance at a radar transmitter, include: sending a radar sensing request message to a radar receiver, wherein the radar sensing request message requests the radar receiver to assist the radar transmitter in performing bistatic radar sensing; In response to the sending, receiving a physical downlink control channel (PDCCH) grant from the radar receiver indicating radar transmission resources; In response to the receiving, transmitting a radar signal toward a region of interest using the radar transmission resources; as well as In response to the sending the radar signal, a radar measurement report message is received from the radar receiver.

14. A method of performing radar sensing assistance at a radar receiver, include: receiving a radar sensing request message from a radar transmitter, the radar sensing request message requesting the radar receiver to assist the radar transmitter in performing bistatic radar sensing; In response to the receiving, sending a physical downlink control channel (PDCCH) grant indicating radar resources to the radar transmitter; In response to the receiving the PDCCH grant, receiving a reflection of a radar signal sent by the radar transmitter; as well as In response to the receiving the reflection of the radar signal, a radar measurement report message is sent to the radar transmitter.

15. An apparatus for wireless communication, comprising a memory, a transceiver and a processor, the processor being coupled to the memory and the transceiver, the apparatus being configured to implement the method according to any one of claims 1 to 14.

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