WO2022001479A1 - Procédé d'envoi de signal de formation de faisceau et dispositif de station de base - Google Patents

Procédé d'envoi de signal de formation de faisceau et dispositif de station de base Download PDF

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Publication number
WO2022001479A1
WO2022001479A1 PCT/CN2021/095413 CN2021095413W WO2022001479A1 WO 2022001479 A1 WO2022001479 A1 WO 2022001479A1 CN 2021095413 W CN2021095413 W CN 2021095413W WO 2022001479 A1 WO2022001479 A1 WO 2022001479A1
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cell
detection
information
signal
perception
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PCT/CN2021/095413
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English (en)
Chinese (zh)
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常国兵
苏昕
龚秋莎
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大唐移动通信设备有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/025—Services making use of location information using location based information parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of beam communication, and in particular, to a beamforming signal sending method and base station equipment.
  • the current NR system supports communication in the millimeter wave frequency band, and the base station often needs to use beamforming technology to form narrow beams to improve the communication coverage of the cell, while the system in the IMT-2030 standard will support the terahertz frequency band (0.1 ⁇ 10THz) communication, the base station The side will use higher-gain antennas and integrate a larger number of antennas and use beamforming technology to form a "pencil-like" ultra-narrow beam to overcome high path loss to further improve cell coverage, and is limited by hardware complexity.
  • In order to obtain the best signal transmission performance in existing communications usually It is necessary to adopt the measurement method of transmit/receive beam scanning to search for the base station to obtain the best transmit beam, and to enable the user to receive the best beam.
  • beam scanning means that the base station transmits one or more beams in the beam direction at a certain moment, and through polling within a period of time, each beam is relayed in turn to complete all the required coverage of the entire cell. beam direction.
  • the downlink transmission process of the NR system includes the following steps: the base station first performs beam scanning to send beam scanning signals, and at the same time, the user measures the wireless signals emitted by different beams sent by the base station, and reports the correlation of each scanning signal to the base station.
  • the base station determines the optimal transmit beam between the base station and the user according to the measurement report sent by the user, but when the system frequency band is up to the terahertz frequency band, the path loss is more serious, so a narrower shaped beam will be used to ensure the cell's Coverage, in this case, due to the narrowing of the beam, it takes longer to cover all the beam directions required for the entire cell, resulting in the existing strategy of traversing the beam direction scanning has obvious shortcomings in the scanning time, and it is necessary to improve too much.
  • the problem of the coverage of communication in the Hertz frequency band needs to be better solved.
  • the purpose of using the method provided by the embodiment of the present application is to solve the problem that when the existing system frequency band is up to the terahertz frequency band, due to the narrowing of the beam, it takes longer to cover all the beam directions required for the entire cell, resulting in the existing traversal
  • the strategy of beam direction scanning has the problem of long scanning time.
  • a first aspect of the embodiments of the present application provides a beamforming signal sending method, the method includes:
  • the downlink signal is beamformed in the directional beam direction, and the beamformed downlink signal is sent to the UE.
  • the collecting environment information in the cell, and determining the surrounding object information of the UE according to the environment information includes:
  • a three-dimensional environment model in the cell is constructed according to the outline and orientation information of objects in the cell.
  • the active detection and perception signals include one or more of laser detection and perception signals, millimeter-wave sensor detection and perception signals, and terahertz wave sensor detection and perception signals; and/or,
  • the passive detection sensing signals include visual sensing detection sensing signals.
  • the passive detection sensing signal includes a visual sensing detection sensing signal
  • the determining the orientation information of the object in the cell according to the detection result of the object includes:
  • the method further includes:
  • Detect the target moving object by using the active detection perception signal and/or the passive detection perception signal, and track the position change of the target moving object according to the detection result of the target moving object;
  • the three-dimensional environment model is updated according to the position change of the target moving object.
  • the tracking of the position change of the target moving object according to the detection result of the target moving object includes:
  • the position changes of the moving objects around the UE are tracked according to the detection results of the moving objects around the UE.
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using an active detection and perception signal and/or a passive detection and perception signal, and the location information of the UE is determined, and the active detection and perception signal includes a millimeter wave sensing detection and perception signal and a terahertz wave sensing detection and perception signal,
  • the passive detection perception signal includes a visual sensor detection perception signal; and/or,
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using the terahertz wave sensing detection and sensing signal, and the location information of the UE is determined by using the millimeter wave sensing detection and sensing signal; or,
  • the location information of the UE is determined by the monocular imaging ranging method or the binocular stereo vision ranging method, or the location information of the UE is determined according to the mapping relationship between the grid orientation obtained by dividing the cell and each pixel point in the cell image. Location information of the UE.
  • the method further includes: determining a directional beam direction to be adopted according to the communication path, including:
  • the indication information of the directional beam direction is carried.
  • the determining a communication path used for communication with the UE and a directional beam direction corresponding to the communication path includes:
  • the position information of the UE and the surrounding object information of the UE determine whether there is an obstruction in the straight path between the UE and the UE;
  • the ray tracing method is used to determine the reflection or scattering path with the UE, and at least one directional beam direction corresponding to the reflection path is determined according to the strongest reflection point on the reflection path , or, at least one directional beam direction corresponding to the scattering path is determined according to the strongest scattering point on the scattering path.
  • a second aspect of an embodiment of the present application provides a network device, where the network device includes:
  • the downlink signal is beamformed in the directional beam direction, and the beamformed downlink signal is sent to the UE.
  • the collecting environment information in the cell, and determining the surrounding object information of the UE according to the environment information includes:
  • a three-dimensional environment model in the cell is constructed according to the outline and orientation information of objects in the cell.
  • the active detection and perception signals include one or more of laser detection and perception signals, millimeter wave sensor detection and perception signals, and terahertz wave sensor detection and perception signals; and/or,
  • the passive detection sensing signals include visual sensing detection sensing signals.
  • the passive detection sensing signal includes a visual sensing detection sensing signal
  • the determining the orientation information of the object in the cell according to the detection result of the object includes:
  • the processor is further configured to read the computer-executed instructions stored in the memory to perform the following process:
  • the active detection sensing signal and/or the passive detection sensing signal are used to detect the target moving object.
  • the detection result of the object tracks the position change of the target moving object;
  • the three-dimensional environment model is updated according to the position change of the target moving object.
  • the tracking of the position change of the target moving object according to the detection result of the target moving object includes:
  • the position changes of the moving objects around the UE are tracked according to the detection results of the moving objects around the UE.
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using an active detection and perception signal and/or a passive detection and perception signal, and the location information of the UE is determined, and the active detection and perception signal includes a millimeter wave sensing detection and perception signal and a terahertz wave sensing detection and perception signal,
  • the passive detection perception signal includes a visual sensor detection perception signal; and/or,
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using the terahertz wave sensing detection and sensing signal, and the location information of the UE is determined by using the millimeter wave sensing detection and sensing signal; or,
  • the position information of the UE is determined by the monocular imaging ranging method or the binocular stereo vision ranging method, or the location information of the UE is determined according to the mapping relationship between the grid orientation obtained by dividing the cell and each pixel in the cell image. Location information of the UE.
  • the processor is further configured to read the computer-executed instructions stored in the memory to perform the following process:
  • the direction of the directional beam to be used is determined according to the communication path, including:
  • the indication information of the directional beam direction is carried.
  • the determining a communication path used for communication with the UE and a directional beam direction corresponding to the communication path comprising:
  • the position information of the UE and the surrounding object information of the UE determine whether there is an obstruction in the straight path between the UE and the UE;
  • the ray tracing method is used to determine the reflection or scattering path with the UE, and at least one directional beam direction corresponding to the reflection path is determined according to the strongest reflection point on the reflection path , or, at least one directional beam direction corresponding to the scattering path is determined according to the strongest scattering point on the scattering path.
  • a third aspect of the embodiments of the present application provides a beamforming signal sending apparatus, the apparatus includes:
  • a detection and perception unit configured to determine the location information of the user terminal UE in the cell; and collect the environmental information in the cell, and determine the surrounding object information of the UE according to the environmental information;
  • a beam direction determining unit configured to determine a communication path used for communication with the UE and a directional beam direction corresponding to the communication path according to the position information of the UE and the surrounding object information of the UE;
  • the beamforming unit is configured to perform beamforming on the downlink signal in the direction of the directional beam, and send the downlink signal after the beamforming to the UE.
  • the collecting environment information in the cell, and determining the surrounding object information of the UE according to the environment information includes:
  • a three-dimensional environment model in the cell is constructed according to the outline and orientation information of objects in the cell.
  • the active detection and perception signals include one or more of laser detection and perception signals, millimeter wave sensor detection and perception signals, and terahertz wave sensor detection and perception signals; and/or,
  • the passive detection sensing signals include visual sensing detection sensing signals.
  • the passive detection sensing signal includes a visual sensing detection sensing signal
  • the determining the orientation information of the object in the cell according to the detection result of the object includes:
  • the detection and perception unit constructs the three-dimensional environment model in the cell according to the outline and orientation information of objects in the cell, it is further configured to:
  • Detect the target moving object by using the active detection perception signal and/or the passive detection perception signal, and track the position change of the target moving object according to the detection result of the target moving object;
  • the three-dimensional environment model is updated according to the position change of the target moving object.
  • the tracking of the position change of the target moving object according to the detection result of the target moving object includes:
  • the position changes of the moving objects around the UE are tracked according to the detection results of the moving objects around the UE.
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using an active detection and perception signal and/or a passive detection and perception signal, and the location information of the UE is determined, and the active detection and perception signal includes a millimeter-wave sensing detection and perception signal and a terahertz wave sensing detection and perception signal,
  • the passive detection perception signal includes a visual sensor detection perception signal; and/or,
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using the terahertz wave sensing detection and sensing signal, and the location information of the UE is determined by using the millimeter wave sensing detection and sensing signal; or,
  • the position information of the UE is determined by the monocular imaging ranging method or the binocular stereo vision ranging method, or the location information of the UE is determined according to the mapping relationship between the grid orientation obtained by dividing the cell and each pixel in the cell image. Location information of the UE.
  • the beam direction determining unit is further configured to: determine the adopted directional beam direction according to the communication path, including:
  • the indication information of the directional beam direction is carried.
  • the determining a communication path used for communication with the UE and a directional beam direction corresponding to the communication path includes:
  • the position information of the UE and the surrounding object information of the UE determine whether there is an obstruction in the straight path between the UE and the UE;
  • the ray tracing method is used to determine the reflection or scattering path with the UE, and at least one directional beam direction corresponding to the reflection path is determined according to the strongest reflection point on the reflection path , or, at least one directional beam direction corresponding to the scattering path is determined according to the strongest scattering point on the scattering path.
  • a fourth aspect of the embodiments of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, any one of the above methods is implemented.
  • a fifth aspect of the embodiments of the present application provides a computer program product, wherein the computer program product includes computer program code, and when the computer program code is run on a computer, any one of the above methods is executed.
  • a sixth aspect of an embodiment of the present application provides a communication device, including a processing circuit and an interface circuit, where the interface circuit is configured to receive computer codes or instructions and transmit them to the processing circuit, where the processing circuit is configured to run the computer code or instructions to perform any of the described methods.
  • a seventh aspect of the embodiments of the present application provides a computer program, where the computer program includes computer program code, and when the computer program code is run on a computer, so that the computer executes any one of the methods.
  • the base station After collecting environmental information within the cell range, the base station directly irradiates the beam to the user's position according to the transmission path, and the user can also follow the instructions provided by the base station.
  • the information is measured using a receiving beam with a smaller angle expansion, which has fast transmission speed and high transmission accuracy.
  • Fig. 1 is the scanning schematic diagram of the existing beam scanning
  • FIG. 2 is a schematic diagram of beamforming sent by a base station to a user terminal UE according to an embodiment of the present application
  • FIG. 3 is a flowchart of a beamforming signal sending step provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a base station device according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a unit of a beamforming signal sending apparatus provided by an embodiment of the present application.
  • GSM Global System Of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS General Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability For Microwave Access
  • the terminal device involved in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the name of the terminal device may be different.
  • the terminal device may be called user equipment (User Equipment, UE).
  • the wireless end devices may communicate with one or more core networks via the RAN, and the wireless end devices may be mobile end devices such as mobile phones (or "cellular" phones) and computers with mobile end devices, for example, which may be portable , pocket, handheld, computer built-in or vehicle mounted mobile devices that exchange language and/or data with the radio access network.
  • Wireless terminal equipment may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, or an access point.
  • Remote Terminal Remote Terminal
  • Access Terminal Access Terminal
  • User Terminal User Terminal
  • User Agent User Agent
  • User Device User Device
  • the network device involved in the embodiments of the present application may be a base station, and the base station may include multiple cells.
  • the base station may also be called an access point, or may refer to a device in the access network that communicates with wireless terminal devices through one or more sectors on the air interface, or other names.
  • the network device can be used to convert received air frames to and from Internet Protocol (IP) packets, and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet. Protocol (IP) communication network.
  • IP Internet Protocol
  • the network devices may also coordinate attribute management for the air interface.
  • the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a Global System For Mobile Communications (GSM) or a Code Division Multiple Access (Code Division Multiple Access, CDMA). ), it can also be a network device (NodeB) in Wide-Band Code Division Multiple Access (WCDMA), or an evolved network device in a Long Term Evolution (Long Term Evolution, LTE) system (Evolutional Node B, eNB or e-NodeB), 5G base station in 5G network architecture (Next Generation System), or Home Evolved Bode B (HeNB), relay node (Relay Node), home base station ( Femto), pico base station (Pico), etc., which are not limited in the embodiments of the present application.
  • BTS Base Transceiver Station
  • GSM Global System For Mobile Communications
  • CDMA Code Division Multiple Access
  • NodeB Wide-Band Code Division Multiple Access
  • WCDMA Wide-Band Code Division Multiple Access
  • the terahertz frequency band (0.1 ⁇ 10THz) will be supported for communication.
  • the base station side will use higher gain antennas and integrate more antennas and use beamforming technology to form a "pencil-shaped" "Ultra-narrow beams to overcome high path loss to further improve cell coverage, but since path loss is more likely to occur in the terahertz band, narrower shaped beams will be used to ensure cell coverage. In this case, due to the narrowing of the beam, it takes longer for beam scanning to cover all beam directions required for the entire cell.
  • the existing traversal beam direction scanning strategy has obvious shortcomings in the scanning time. .
  • an embodiment of the present application proposes a beamforming signal transmission method, which can perform fast beamforming based on the user's location and improve the communication speed in the terahertz frequency band.
  • FIG. 2 it is a schematic diagram of the base station 101 sending beamforming to the user terminal UE 102.
  • the base station determines the environmental information within the range of the cell base station through the detection and perception method, wherein the environmental information can be the object that affects the beamforming. , and objects that can reflect the shaped beam, and determine the location information of the UE within the range of the cell base station according to the detection perception, and according to the quality of each transmission link of the shaped beam between the base station and the UE, in the direction of the directional beam, the downlink
  • the signal is beamformed and sent to the UE.
  • the embodiment of the present application provides a beamforming signal transmission method, which is applied to the base station side. As shown in FIG. 3 , the method includes the following steps:
  • Step S301 determining the location information of the user terminal UE in the cell, collecting environmental information within the cell range, and determining the surrounding object information of the UE according to the environmental information;
  • the above-mentioned location information of the UE may be the position coordinates of the UE determined by using the positioning coordinates, or may be the distance and distance of the UE relative to the base station and the base station. direction angle.
  • the location information of the UE in the cell can be determined by any positioning method, for example, the UE in the cell sends to the base station the identity of the location or the carrying location of the device, or the base station can actively scan the location of each UE and the UE in the cell , where each UE is determined by scanning, either by installing a marker in the UE in advance, and when the base station scans, whether the scanned object is a UE can be determined according to the marker, or a marker can be placed on the surface of the UE, When the base station recognizes the identifier through the image, the object at the location is determined to be the UE.
  • the manner of determining the location information of the user terminal UE in the cell is not limited to the manner provided in the foregoing embodiment, which should be known by those skilled in the art, and will not be repeated here.
  • the above cell range may be the farthest range that the cell base station can cover during communication, or the farthest detection position that the cell base station can detect.
  • the final determined cell range is that the cell base station can both communicate and cover And the location that the cell base station can detect.
  • the function of the collected environmental information within the cell range is to determine whether there are obstacles that block the transmission of the shaped beam and objects that can reflect the scattered beam before determining that the downlink beamforming signal needs to be sent, so that the downlink beamforming signal It can be sent from the base station to the UE side in the form of the strongest signal or the fastest speed under the condition of ensuring the transmission quality or speed.
  • the above environment information may be the same type of environment information, or may be different types of environment information.
  • the base station uses multiple types of environment information to detect the UE.
  • Comprehensive analysis of the object information of the UE can determine the outline, orientation and material information of the objects around the UE.
  • only the objects existing in the coverage area of the base station need to be determined to determine the environment information in this embodiment, so as to determine whether there is an object that affects the transmission of the beamforming signal on the path sent by the base station to the UE side.
  • the above method of collecting environmental information within the cell range may be to detect objects by sending detection signals to each object in the cell, and determine the contour, orientation, material and other information according to the signals fed back by the detection signals received by each object, or to detect the objects in the cell. Real-time shooting of each object inside, and object detection based on the captured image to determine the contour, orientation and other information.
  • the environmental information can be imported into the modeling software to draw a three-dimensional model, and the base station can draw the three-dimensional model according to the three-dimensional model.
  • the beam path sent by the base station to the UE is simulated on the model, and when drawing the model, the plane model can also be drawn first. If it is determined that there is no obstruction in a certain direction of the plane model, the subsequent direction can be used directly. Sends a directional beam, which simplifies the model drawing process and increases the speed of direction determination.
  • the above-mentioned environmental information may be an object that is stationary for a period of time or an object that moves within a cell.
  • the environmental information determined by the stationary object and the environmental information determined by the moving object may be used in combination or separately. , the purpose is to ensure that the positions of objects and UEs in the current cell are immediacy.
  • the environment information in the entire cell range can be scanned as a whole, and the surrounding environment information of the UE can also be scanned so that the base station can reduce the detection power consumption.
  • Step S302 according to the position information of the UE and the surrounding object information of the UE, determine a communication path used for communication with the UE and a directional beam direction corresponding to the communication path;
  • the UE In order to communicate with the UE, it is first necessary to determine the location information of the UE and whether there is object information around the UE. Specifically, when it is determined that there is no obstruction on the path where the UE communicates with the base station, at this moment, send the information to the object.
  • the directional beam is sent in the direction of the obstruction. If there is an obstruction that blocks all straight paths for communication between the base station and the UE, the shaped beam can be sent to the UE by reflection or scattering from objects in other positions.
  • the directional beam transmission is performed according to the pre-planned optimal path, so that the UE obtains a larger received signal strength
  • the base station may wait for a preset time, and when there is a path capable of beam transmission at the next moment, plan a path for directional beam transmission.
  • the base station can determine the multiple paths, select a path with the best beam transmission effect, and send directional beams in the direction of the path, or send the directional beam in the direction of the path.
  • the base station sends directional beams to multiple feasible paths, so that the transmission effect of downlink signals is the best.
  • All transmission paths can be obtained by simulating using the ray tracing method, but the UE may not be able to receive sufficient signal strength on these transmission paths, that is, the signal strength received by the UE does not reach its detection threshold.
  • Factors affecting the signal strength received by the UE include base station transmit power, base station antenna gain, environment and other factors.
  • the base station transmits a shaped beam in the best direction, so that the UE can receive higher power, thereby obtaining better performance;
  • the UE received signal power does not reach its detection threshold on all paths, however, it is still possible to simulate and find the best beam direction, even if the best transmission
  • the signal on the path also cannot reach the UE detection threshold.
  • the path can be simulated by the method of simulation, that is, there must be a transmission path (the electromagnetic wave propagation modes include reflection, scattering, diffraction, transmission, etc.). Then, the base station uses the shaped beam in the best beam direction. There should be two situations:
  • the base station uses beamforming technology, and the UE can obtain sufficient signal strength, indicating that the connection establishment is completed;
  • the base station uses beamforming technology, but the UE still cannot obtain sufficient signal strength. It can be considered that the base station uses related technologies, such as using power control technology to increase some transmit power in the transmit direction, so as to ensure the normal establishment of the connection.
  • the base station may wait for a preset time, and when there is a beam direction capable of establishing a connection at the next moment, plan a path for directional beam transmission.
  • the base station is only responsible for the detection, perception, storage and data update of the environment of the cell and the UE, and when the base station detects the location of the UE, it means that the UE is within the coverage of the base station, and the base station needs to communicate with the UE. , obtain the optimal path through ray tracing simulation, and then instruct the base station to send out a shaped beam to the path and establish a connection with the UE. If the base station still cannot establish a connection with the UE using the shaped beam, it means that the signal power received by the UE does not reach the detection threshold.
  • Step S303 Perform beamforming on the downlink signal in the direction of the directional beam, and send the beamformed downlink signal to the UE.
  • the UE can measure the directional beam faster when scanning the beam sent by the designated base station.
  • Beam direction or, when the UE receives the directional beam sent for the first time in this direction, the direction is regarded as the optimal beam direction. After the UE receives the optimal beam direction information, it can use a smaller scanning amplitude or angle than the previous scan.
  • the above-mentioned method of indicating the optimal beam direction is not limited to the method provided above, and other indicating methods can also be applied in this application, which should be known by those skilled in the art, and will not be repeated here.
  • the collecting environment information in the cell, and determining the surrounding object information of the UE according to the environment information includes:
  • the active detection and perception signal includes one or more of laser detection and perception signal, millimeter wave sensor detection and perception signal, and terahertz wave sensor detection and perception signal; and/or;
  • the passive detection sensing signals include visual sensing detection sensing signals.
  • the base station side can use the detection and perception module to collect UEs within the cell range and environmental information within the cell range, wherein the detection and perception module can be integrated in the base station, or can be used as an independent device for each spatial location within the cell range It is not limited here.
  • Active detection and perception means that the base station controls the detection and perception module to send active detection and perception signals to at least one direction, and the active detection and perception signals include laser detection and perception signals, millimeter-wave sensor detection and perception signals, and terahertz wave sensors. Any one or any of the multiple signals, the above-mentioned signals may be used in combination or separately to determine the profile and orientation information of objects in the cell.
  • Active detection and perception method Use laser detection and perception signals to detect objects.
  • the distance information of the target object can be quickly obtained by emitting laser light to each object in the area of the cell and the time difference of receiving the reflected laser light, and the orientation of the target object can be obtained by obtaining the scanning angle of the laser, using the method of laser detection. It has the characteristics of high measurement accuracy, fast response time and insensitivity to changes in the lighting environment.
  • the contour of each object in the community can be detected by laser.
  • Active detection and perception method Use millimeter wave sensor detection and perception signals to detect objects.
  • the laser beam emitted by the laser sensing module has a strong directionality, it is easy to appear blind spots of vision, that is, if there is an obstruction on the laser transmission path, it is impossible to perceive the object information without distance difference. Therefore, for objects in the blind area of vision, the laser blind area can be covered by millimeter waves, and the sensing distance of the millimeter wave sensing module is farther than that of the laser sensing module, and the position information of each object in the cell can be detected through the millimeter wave.
  • Active detection and perception method 3 Use terahertz wave sensing to detect and sense signals to detect objects.
  • millimeter waves can only determine the location information of objects in the cell, but it is difficult to identify objects, while terahertz waves have strong penetration of non-polar materials, and terahertz waves have the "fingerprint spectrum" characteristic. , so that the occluded target can be detected, and then the position information of each object in the cell can be obtained.
  • the passive detection and perception signal includes a visual sensor detection and perception signal
  • the determination of the orientation information of the object in the cell according to the detection result of the object includes:
  • Orientation information of objects in the cell is determined according to the mapping relationship between the grid orientation obtained by dividing the cell and each pixel in the cell image.
  • the base station uses at least one high-definition camera in the detection and perception module to obtain surrounding environment information based on image analysis, and uses image analysis and recognition technology to perceive the shape, size and position of objects within the cell range.
  • the determination can be obtained by the monocular imaging ranging method and the binocular stereo vision ranging method, or, the base station divides the space within the cell coverage in advance, and measures the spatial coordinate value of each grid, Then create a mapping relationship. In this way, each pixel of the picture captured by the camera has position information. When an object appears within the visual coverage of the sensor, the position coordinates of the object can be directly estimated by the pixels it occupies.
  • the above-mentioned active detection and perception signals and passive detection and perception signals can be used separately or in combination.
  • one method of using the signals in combination is that after the camera performs imaging, the specific category information of the object is obtained through image analysis and recognition. Then the base station controls the position determined by the image analysis, and sends out active detection and perception signals, such as lasers, millimeter waves or terahertz waves, for fixed-point ranging and material analysis.
  • a three-dimensional environment model in the cell is constructed according to the outline and orientation information of objects in the cell.
  • the outline and orientation information are input into the model building software, and the outline and orientation information are entered according to the outline and orientation information. , and construct a 3D three-dimensional model of each object in the cell, so that the subsequent base station determines the direction of beam directional transmission according to the above-mentioned three-dimensional model.
  • the method further includes:
  • Detect the target moving object by using the active detection perception signal and/or the passive detection perception signal, and track the position change of the target moving object according to the detection result of the target moving object;
  • the three-dimensional environment model is updated according to the position change of the target moving object.
  • the parts that change are mainly movable vehicles and people, and buildings are the framework that composes the entire 3D model, and this framework is not updated frequently. Therefore, the model within the coverage of the entire base station does not need to be updated frequently after the drawing is completed, but only needs to be updated regularly.
  • the positions of vehicles and people that have changed are updated in this framework. If there is a moving object blocking the directional path within the cell, the transmission quality of the beam signal will be affected. Therefore, after determining the UE that sends the signal, detect the inside of the cell. Whether the position of each object has changed compared with the 3D three-dimensional model drawn at the previous moment, if there is a position change, the current three-dimensional environment model will be updated according to the current position information.
  • the 3D model is reported to the base station, and then only moving objects (moving cars, pedestrians, etc.) are reported, and static objects (buildings, trees, stationary cars, etc.) are no longer reported, unless the static objects in the environment have changed.
  • determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using an active detection and perception signal and/or a passive detection and perception signal, and the location information of the UE is determined, and the active detection and perception signal includes a millimeter-wave sensing detection and perception signal and a terahertz wave sensing detection and perception signal,
  • the passive detection perception signal includes a visual sensor detection perception signal; and/or,
  • the terahertz wave sensing and sensing signals are used to identify the UEs in the cell, and the millimeter wave sensing and sensing signals are used to determine the location information of the UE.
  • the specific position of the object is first determined by using the millimeter wave sensor to detect the perception signal, and the spectrum analysis is performed by using the terahertz wave. If the material of the object is determined to be UE after the spectrum analysis, the UE is determined according to the millimeter wave.
  • the UE can be equipped with a marker, and the marker can be integrated into the UE. When the millimeter wave or terahertz wave recognizes the marker, the location information of the UE can be determined.
  • the location information of the UEs can be determined by a monocular imaging ranging method or a binocular stereoscopic vision ranging method, or, according to the grid orientation obtained by dividing the cell and the The mapping relationship of each pixel in the cell image determines the location information of the UE.
  • the image analysis of the portrait and the UE equipment is performed on the image of the cell. If it is determined that a certain part of the image is a person or a UE, the location information of the UE is determined. During image analysis, when a marker is identified in the image, the location information of the UE is determined, wherein the identification of the marker is related to the size of the marker and the resolution error of the camera, which is not limited here.
  • determining the location information of the user terminal UE in the cell may be: receiving a location request that carries a location identifier sent by the UE, and according to the location identifier and different location identifiers and the location location to determine the location information of the UE.
  • the UE device first sends a positioning request carrying a positioning identifier to the base station, and the base station determines the location information of the UE according to the unique identifier of the UE and the positioning identifier.
  • the type of the positioning identifier is not limited here.
  • the method further includes: determining a directional beam direction to be adopted according to the communication path, including:
  • the indication information of the directional beam direction is carried.
  • the downlink signal for beamforming in the directional beam direction also carries the directional beam direction indication information, and the UE according to the directional beam direction indication information , taking the best receiving direction corresponding to the directional beam direction as the receiving center, and using a smaller angular extension range for beam measurement.
  • the tracking of the position change of the target moving object according to the detection result of the target moving object includes:
  • the position changes of the moving objects around the UE are tracked according to the detection results of the moving objects around the UE.
  • the base station When the base station needs to send a signal, it has already determined the location information of the UE to be sent. Therefore, if the base station is informed of all objects that have changed their positions within the cell range, there will also be a lot of useless data. Model time, but in fact, it is only necessary to determine the objects whose positions change on the transmission path between the base station and the UE. Specifically, the base station determines whether the objects in the cell are related to the UE according to the positional relationship between the base station signal transmission device and the UE. Relevance, that is, whether the movement of the object will affect the transmission of the signal. If there is an unrelated moving object, the detection and perception module will no longer track and measure the unrelated moving object, only track and report the relevant moving object, and update the three-dimensional model. The method is the same as the above construction. The method of the three-dimensional model is based on the same concept and will not be repeated here.
  • the determining of a communication path used for communication with the UE and a directional beam direction corresponding to the communication path includes:
  • the position information of the UE and the surrounding object information of the UE determine whether there is an obstruction in the straight path between the UE and the UE;
  • the ray tracing method determines the reflection or scattering path with the UE, select the strongest and second strongest reflection or scattering paths from the simulation results, and determine one or more correspondingly The best reflection point or scattering point, at least one directional beam direction corresponding to the reflection path is determined according to the strongest reflection point on the reflection path, or determined according to the strongest scattering point on the scattering path at least one directional beam direction corresponding to the scattering path.
  • the position information of the base station and the UE in the updated 3D model is used to determine the signal transmission path between the two, that is, whether there is an obstruction. If there is no occlusion, the base station calculates the straight-line path distance and angle between the base station and the UE according to the coordinates, and controls the base station antenna to send a shaped beam to the UE; if there is an occlusion, the 3D model is used to find the Find out the reflection or scattering path between the base station and the UE, determine the best reflection or scattering path and reflection/scattering point, and determine the length of the path and the position and angle of the reflection/scattering point, and then control the base station antenna to emit to this point directional beam.
  • the ray tracing method is a method for solving the ray path and electromagnetic wave propagation time between two points given the position of the transmitting point and the receiving point and the wave speed of the medium. It is mainly divided into two types: forward algorithm and reverse algorithm.
  • the test firing method, the bending method, the finite difference method, the travel time interpolation method, the shortest path method and the wavefront construction method are all forward algorithms.
  • the optimal transmission path may be one or two. Specifically, using one or two paths and sending one or two shaped beams along the path depends on whether the communication link is satisfied. Budget requirements, when the communication link budget requirements are not met, if there are multiple optimal paths, and selecting an optimal path can satisfy the communication, the shaped beam can be sent on any optimal path.
  • the above-mentioned base station antenna deployment in this application has various forms.
  • the base station antennas can be distributed and configured in various positions in the cell, or centrally arranged in the cell.
  • determining the communication path from the base station to the UE it can be determined according to the distance
  • the nearest base station antenna is determined, and the communication path from the nearest base station antenna to the corresponding UE can also be pre-configured for each UE to determine the communication path from the pre-configured base station antenna to the corresponding UE.
  • the base station After collecting environmental information within the cell range, the base station directly irradiates the beam to the user's position according to the transmission path, and the user can also follow the instructions provided by the base station.
  • the information is measured using a receiving beam with a smaller angle expansion, which has fast transmission speed and high transmission accuracy.
  • the device includes one or more processors (full name in English: central processing units, abbreviation in English: CPU) 401 (for example, one or more processors ) and memory 402, one or more storage media 403 (eg, one or more mass storage devices) that store applications 404 or data 406.
  • processors full name in English: central processing units, abbreviation in English: CPU
  • storage media 403 eg, one or more mass storage devices
  • the memory 402 and the storage medium 403 may be short-term storage or persistent storage.
  • the program stored in the storage medium 403 may include one or more modules (not shown in the figure).
  • the processor 401 may be configured to communicate with the storage medium 403, and the device 400 executes a series of instruction operations in the storage medium 403.
  • Device 400 may also include one or more power supplies 409, one or more wired or wireless network interfaces 407, one or more input and output interfaces 408, and/or, one or more operating systems 405, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc.
  • the processor 401 is configured to read the instructions in the memory and perform the following processes:
  • the downlink signal is beamformed in the directional beam direction, and the beamformed downlink signal is sent to the UE.
  • the collecting environment information in the cell, and determining the surrounding object information of the UE according to the environment information includes:
  • a three-dimensional environment model in the cell is constructed according to the outline and orientation information of objects in the cell.
  • the active detection and perception signals include one or more of laser detection and perception signals, millimeter wave sensor detection and perception signals, and terahertz wave sensor detection and perception signals; and/or,
  • the passive detection sensing signals include visual sensing detection sensing signals.
  • the passive detection sensing signal includes a visual sensing detection sensing signal
  • the determining the orientation information of the object in the cell according to the detection result of the object includes:
  • the processor is further configured to read the computer-executed instructions stored in the memory to perform the following process:
  • the active detection sensing signal and/or the passive detection sensing signal are used to detect the target moving object.
  • the detection result of the object tracks the position change of the target moving object;
  • the three-dimensional environment model is updated according to the position change of the target moving object.
  • the tracking of the position change of the target moving object according to the detection result of the target moving object includes:
  • the position changes of the moving objects around the UE are tracked according to the detection results of the moving objects around the UE.
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using an active detection and perception signal and/or a passive detection and perception signal, and the location information of the UE is determined, and the active detection and perception signal includes a millimeter-wave sensing detection and perception signal and a terahertz wave sensing detection and perception signal,
  • the passive detection perception signal includes a visual sensor detection perception signal; and/or,
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using the terahertz wave sensing detection and sensing signal, and the location information of the UE is determined by using the millimeter wave sensing detection and sensing signal; or,
  • the position information of the UE is determined by the monocular imaging ranging method or the binocular stereo vision ranging method, or the location information of the UE is determined according to the mapping relationship between the grid orientation obtained by dividing the cell and each pixel in the cell image. Location information of the UE.
  • the processor is further configured to read the computer-executed instructions stored in the memory to perform the following process:
  • the direction of the directional beam to be used is determined according to the communication path, including:
  • the indication information of the directional beam direction is carried.
  • the determining a communication path used for communication with the UE and a directional beam direction corresponding to the communication path includes:
  • the position information of the UE and the surrounding object information of the UE determine whether there is an obstruction in the straight path between the UE and the UE;
  • the straight path is determined as the main communication path, and the directional beam direction corresponding to the straight path is determined; of course, the UE will also receive signals from other paths, and the main communication path is determined here. After the direction, the beam is directed in this direction;
  • the occluder exists, use the ray tracing method to determine the reflection or scattering path with the UE, select the strongest and second strongest reflection or scattering paths from the simulation results, and determine one or more optimal reflections accordingly point or scattering point, at least one directional beam direction corresponding to the reflection path is determined according to the strongest reflection point on the reflection path, or determined according to the strongest scattering point on the scattering path and the scattering point At least one directional beam direction corresponding to the path.
  • the base station device provided in this embodiment is based on the same concept as the base station provided in the foregoing embodiment, and various implementation methods provided in the foregoing embodiment can be applied to the base station device in this embodiment, which will not be repeated here.
  • An embodiment of the present application provides an apparatus for transmitting a beamforming signal. As shown in FIG. 5 , the apparatus includes the following units:
  • a detection and perception unit 501 configured to determine location information of a user terminal UE in a cell; and collect environmental information in the cell, and determine information about objects around the UE according to the environmental information;
  • a beam direction determining unit 502 configured to determine a communication path used for communication with the UE and a directional beam direction corresponding to the communication path according to the position information of the UE and the surrounding object information of the UE;
  • the beamforming unit 503 is configured to perform beamforming on the downlink signal in the direction of the directional beam, and send the downlink signal after the beamforming to the UE.
  • the collecting environment information in the cell, and determining the surrounding object information of the UE according to the environment information includes:
  • a three-dimensional environment model in the cell is constructed according to the outline and orientation information of objects in the cell.
  • the active detection and perception signals include one or more of laser detection and perception signals, millimeter wave sensor detection and perception signals, and terahertz wave sensor detection and perception signals; and/or,
  • the passive detection sensing signals include visual sensing detection sensing signals.
  • the passive detection sensing signal includes a visual sensing detection sensing signal
  • the determining the orientation information of the object in the cell according to the detection result of the object includes:
  • the detection and perception unit constructs the three-dimensional environment model in the cell according to the outline and orientation information of objects in the cell, it is further configured to:
  • Detect the target moving object by using the active detection perception signal and/or the passive detection perception signal, and track the position change of the target moving object according to the detection result of the target moving object;
  • the three-dimensional environment model is updated according to the position change of the target moving object.
  • the tracking of the position change of the target moving object according to the detection result of the target moving object includes:
  • the position changes of the moving objects around the UE are tracked according to the detection results of the moving objects around the UE.
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using an active detection and perception signal and/or a passive detection and perception signal, and the location information of the UE is determined, and the active detection and perception signal includes a millimeter-wave sensing detection and perception signal and a terahertz wave sensing detection and perception signal,
  • the passive detection perception signal includes a visual sensor detection perception signal; and/or,
  • the determining the location information of the user terminal UE in the cell includes:
  • the UE in the cell is identified by using the terahertz wave sensing detection and sensing signal, and the location information of the UE is determined by using the millimeter wave sensing detection and sensing signal; or,
  • the position information of the UE is determined by the monocular imaging ranging method or the binocular stereo vision ranging method, or the location information of the UE is determined according to the mapping relationship between the grid orientation obtained by dividing the cell and each pixel in the cell image. Location information of the UE.
  • the beam direction determining unit is further configured to: determine the adopted directional beam direction according to the communication path, including:
  • the indication information of the directional beam direction is carried.
  • the determining a communication path used for communication with the UE and a directional beam direction corresponding to the communication path includes:
  • the position information of the UE and the surrounding object information of the UE determine whether there is an obstruction in the straight path between the UE and the UE;
  • the occluder exists, use the ray tracing method to determine the reflection or scattering path with the UE, select the strongest and second strongest reflection or scattering paths from the simulation results, and determine one or more optimal reflections accordingly point or scattering point, at least one directional beam direction corresponding to the reflection path is determined according to the strongest reflection point on the reflection path, or determined according to the strongest scattering point on the scattering path and the scattering point At least one directional beam direction corresponding to the path.
  • the beamforming signal transmitting apparatus provided in this embodiment is based on the same concept as the base station provided in the above-mentioned embodiments. Various implementation methods provided in the above-mentioned embodiments can all be applied to the beamforming signal transmitting apparatus in this embodiment. Again.
  • Embodiments of the present application further provide a computer storage medium, on which a computer program is stored, and when the computer program is executed by a processor, implements any one of the beamforming signal sending methods provided in the foregoing embodiments.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente demande concerne un procédé d'envoi de signal de formation de faisceau et un dispositif de station de base. Le procédé est appliqué à un côté station de base, et comprend : la détermination d'informations de position d'un équipement utilisateur (UE) dans une cellule, l'acquisition d'informations environnementales dans la plage de la cellule et la détermination d'informations d'objet environnant de l'UE en fonction des informations environnementales ; la détermination, en fonction des informations de position et de l'objet environnant de l'UE, d'un trajet de communication utilisé pour communiquer avec l'UE et d'une direction de faisceau orientée correspondante ; et la réalisation d'une formation de faisceau sur un signal de liaison descendante dans la direction de faisceau orientée et l'envoi du signal de liaison descendante à l'UE. Le procédé proposé par les modes de réalisation de la présente invention ne nécessite pas de balayage de faisceau ; après l'acquisition des informations environnementales dans la plage d'une cellule, une station de base irradie directement un faisceau en direction de la position d'un utilisateur selon un trajet de transmission, et l'utilisateur peut également réaliser une mesure à l'aide d'un faisceau de réception étalé à un angle plus petit, ce qui permet de mettre en œuvre une vitesse de transmission rapide et une précision de transmission élevée.
PCT/CN2021/095413 2020-07-03 2021-05-24 Procédé d'envoi de signal de formation de faisceau et dispositif de station de base WO2022001479A1 (fr)

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