CN111954229A - Position information sending method and device and terminal equipment - Google Patents

Position information sending method and device and terminal equipment Download PDF

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Publication number
CN111954229A
CN111954229A CN201910413974.5A CN201910413974A CN111954229A CN 111954229 A CN111954229 A CN 111954229A CN 201910413974 A CN201910413974 A CN 201910413974A CN 111954229 A CN111954229 A CN 111954229A
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base station
terminal equipment
terminal device
ith
signal intensity
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杜明德
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • 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
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

A method, a device and a terminal device for sending position information are disclosed, wherein the method comprises the following steps: the method comprises the steps that terminal equipment obtains first signal strength, wherein the first signal strength is the total signal strength from a first base station to an nth base station covering the position of the terminal equipment, the first base station is a base station to which the terminal equipment is currently accessed, and the terminal equipment analyzes the first signal strength to obtain the signal strength of each base station respectively corresponding to the first base station to the nth base station; calculating the distance between the terminal equipment and each base station according to the signal intensity of each base station, and determining the position information of the terminal equipment according to the distance between the terminal equipment and each base station; and sending the position information to the first base station. According to the method, the terminal equipment reports the position information, so that the base station can determine a beam scanning range smaller than that when the position information is not received, the beam scanning range can be greatly reduced, the beam alignment overhead is reduced, and the beam alignment efficiency is improved.

Description

Position information sending method and device and terminal equipment
Technical Field
The present application relates to the field of communications, and in particular, to a method and an apparatus for sending location information, and a terminal device.
Background
In a wireless communication system, with the increasing aspects of system capacity, system service diversity, and the like, technologies such as large-scale Multiple Input Multiple Output (MIMO), millimeter wave, and the like have become key technologies in the field of wireless communication. Further, there is a need in these technologies to manage beams, and generally, means of beam management include beam forming, beam alignment, beam tracking, and the like. In particular, for millimeter wave communication systems, in order to compensate for the large path loss problem caused by millimeter wave space transmission, high gain, narrow beam antenna systems are generally used.
However, in the millimeter wave communication system, beam alignment becomes difficult due to the narrow beam of the antenna system. For example, in the process of beam alignment, if the method of beam traversal is adopted, it is necessary to traverse the beam state of each set of pairing of the base station and the terminal device, and find the optimal beam pairing combination from the beam state, and the efficiency of beam alignment and beam tracking is low. If a low-frequency wireless communication system (generally, a Sub-6GHz wireless communication system, and a beam of an antenna system is wide) is used AS an auxiliary mode, parameters such AS an angle of arrival (DOA), an Angle Spread (AS), and the like, of channel information measured by the low-frequency wireless communication system cannot be accurately used in a millimeter wave communication system due to inconsistency between a beam width and an operating frequency band, especially in a non-Line of Sight (NLOS) scenario. Even if the GPS positioning information is used to assist the millimeter wave system in performing beam alignment, the GPS system positioning may be disabled due to indoor scenes such as a gym and a large studio, and therefore, the beam management method of the millimeter wave communication system has certain limitations and deficiencies in performing beam alignment, beam switching, and beam tracking, which affects the performance of the millimeter wave communication system.
Disclosure of Invention
The method for sending the position information aims at solving the problems that the beam management efficiency of the existing wireless communication system is low, and the low-frequency wireless communication system cannot be combined with a GPS positioning system to assist the beam management in indoor and other scenes.
Specifically, the embodiment of the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application provides a method for sending location information, where the method includes: the method comprises the steps that terminal equipment obtains first signal strength, analyzes the first signal strength to obtain the signal strength of each base station from the first base station to the nth base station, calculates the distance between the terminal equipment and each base station according to the signal strength of each base station, and determines the position information of the terminal equipment according to the distance between the terminal equipment and each base station; and sending the location information to the first base station.
The first signal intensity is the total signal intensity from a first base station covering the position of the terminal equipment to an nth base station, the first base station is a base station which the terminal equipment is currently accessed to, and n is a positive integer greater than or equal to 2; and the signal strength of each base station is generated by an alternating magnetic field acting on the base station.
With reference to the first aspect, in a possible implementation of the first aspect, the analyzing, by the terminal device, the first signal strength to obtain a signal strength of each base station respectively corresponding to the first base station to the nth base station includes: for the ith base station from the first base station to the nth base station, the terminal device obtains the signal intensity of the ith base station by performing Fourier transform on the first signal intensity, wherein the signal intensity of the ith base station is expressed by expression 1;
expression 1:
Figure BDA0002063745800000021
wherein B represents the signal intensity of the AC magnetic field, μ0The magnetic permeability in vacuum is represented, N represents the number of turns of the coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross sectional area of the coil of the ith base station, assuming that the cross sectional areas of the coils of the N turns are the same, d represents the distance between the terminal equipment and the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
With reference to the first aspect, in another possible implementation of the first aspect, the calculating, by the terminal device, a distance between the terminal device and each base station according to the signal strength of each base station includes: for the ith base station from the first base station to the nth base station, the terminal equipment calculates the distance between the terminal equipment and the ith base station according to expression 2;
expression 2:
Figure BDA0002063745800000022
wherein d represents the distance between the terminal device and the ith base station, B represents the signal intensity of the alternating current magnetic field of the ith base station, and mu0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of the coil of the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
With reference to the first aspect, in yet another possible implementation of the first aspect, the determining, by the terminal device, the location information of the terminal device according to a distance between the terminal device and each base station includes: and the terminal equipment calculates the coordinates of the terminal equipment according to the information of the terminal equipment and at least two base stations and a triangulation method, and the coordinates are used as the position information of the terminal equipment.
The triangulation method is a mathematical principle, and is characterized in that two or more detectors are used for detecting the position of a target at different positions, and then the position and the distance of the target are determined by using a triangular geometric principle. For example, a three-point positioning algorithm based on Received Signal Strength Indication (RSSI) solves the coordinates of an unknown point at the coordinates of known three points and the Signal values of the RSSI from the unknown point to the three points. In the embodiment of the present application, the RSSI signal is converted into a distance: the position of each base station is obtained by obtaining the longitude and latitude of each base station, a spherical coordinate system is established at the position of each base station, the spherical center (origin) of the spherical coordinate system is the position of the first base station, so that the space positions of each base station and the terminal equipment are converted into two-dimensional coordinates of a horizontal plane, and the position coordinates of the terminal equipment are convenient to calculate and determine.
With reference to the first aspect, in yet another possible implementation of the first aspect, after the sending, by the terminal device, the location information to the first base station, the method further includes: the terminal equipment receives a beam scanning range sent by the first base station, wherein the beam scanning range can be determined according to the position information; the terminal equipment determines a target beam in the beam scanning range, wherein the beam scanning range corresponds to at least one beam; and the terminal equipment sends the beam identifier corresponding to the target beam to the base station.
With reference to the first aspect, in yet another possible implementation of the first aspect, the determining, by the terminal device, a target beam in the beam scanning range includes: the terminal equipment traverses each beam in the beam scanning range to obtain the RSRP or SNR of each beam; selecting a maximum value of all the RSRPs or SNRs, or selecting the RSRPs or SNRs reaching a preset threshold value, and taking the RSRPs or SNRs of the maximum value or the beams corresponding to the RSRPs or SNRs reaching the preset threshold value as the target beams.
In a second aspect, an embodiment of the present application provides a location information sending apparatus, where the apparatus is configured to implement the location information sending method in the foregoing first aspect and various implementations of the first aspect. The device is a terminal device or a device integrated in the terminal device.
Optionally, the apparatus includes at least one functional unit or module, and further, the at least one functional unit is a receiving unit, a processing unit, or a transmitting unit.
In a third aspect, this embodiment further provides a method for receiving location information, where the method includes: the method comprises the steps that a base station receives position information of terminal equipment sent by the terminal equipment, wherein the position information is determined by the terminal equipment according to at least two distances, the base station determines a beam scanning range according to the position information of the terminal equipment, the beam scanning range corresponds to the position information, and the beam scanning range is sent to the terminal equipment.
With reference to the third aspect, in a possible implementation of the third aspect, the determining, by the base station, a beam scanning range according to the location information of the terminal device includes: and the base station determines the beam scanning range according to the position information of the terminal equipment and the corresponding relation between the position information and the beam scanning range.
In a fourth aspect, an embodiment of the present application provides a position information receiving apparatus, which is configured to implement the position information receiving methods in the foregoing third aspect and various implementations of the third aspect. Wherein the apparatus is a network device or an apparatus integrated in a network device, such as a base station.
Optionally, the apparatus includes at least one functional unit or module, and further, the at least one functional unit is a receiving unit, a processing unit, or a transmitting unit.
In a fifth aspect, embodiments of the present application further provide a communication device, including a processor and a memory, where the processor is coupled to the memory, and the memory is used to store instructions; the processor is configured to invoke the instruction to enable the communication device to execute the location information sending method in the foregoing first aspect and various implementations of the first aspect, or the processor is configured to invoke the instruction to enable the communication device to execute the location information receiving method in the foregoing third aspect and various implementations of the third aspect.
Optionally, the communication device further includes a transceiver, configured to receive or send information and data of an opposite-end device.
Optionally, the communication device is the apparatus of the second aspect or the fourth aspect, and further, when the communication device is the apparatus of the second aspect, the communication device may be a terminal device, such as a UE; when the communication device is the apparatus of the fourth aspect, it may be a network device, such as a base station or an access point.
In a sixth aspect, this embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the storage medium, and when the instructions are executed on a computer or a processor, the instructions are configured to perform the method in the foregoing first aspect and various implementations of the first aspect, or to perform the method in the foregoing third aspect and various implementations of the third aspect.
In a seventh aspect, this application embodiment further provides a computer program product, where the computer program product includes computer instructions, and when the instructions are executed by a computer or a processor, the method in the foregoing first aspect and various implementations of the first aspect may be implemented, or the method in the foregoing third aspect and various implementations of the third aspect may be implemented.
In an eighth aspect, embodiments of the present application further provide a chip system, where the chip system includes a processor and an interface circuit, where the interface circuit is coupled to the processor, and the processor is configured to execute a computer program or instructions to implement the methods in the foregoing first aspect and various implementations of the first aspect, or to implement the methods in the foregoing third aspect and various implementations of the third aspect; wherein the interface circuit is configured to communicate with other modules outside the system-on-chip.
In a ninth aspect, an embodiment of the present application further provides a wireless communication system, including at least two network devices and at least one terminal device, where the at least two network devices include at least one first network device, and the first network device manages the terminal device, where the terminal device is configured to implement the location information sending method in the foregoing first aspect and various implementations of the first aspect, and each network device may be configured to implement the location information receiving method in the foregoing third aspect and various implementations of the third aspect.
Optionally, the network device is a base station, or an access point, or a station.
In the method provided by this embodiment, the terminal device calculates the location information of the terminal device according to the signal intensity of the ac magnetic field generated by the n base stations covering the location of the terminal device, and reports the location information to the currently accessed base station, so that after the base station acquires the location information of the terminal device, a beam scanning range smaller than that when the location information is not received can be determined, and the beam scanning range is fed back to the terminal device, so that the terminal device can scan a beam in a specified smaller beam range, thereby greatly reducing the beam scanning range, reducing the overhead of a beam alignment process, and improving the beam alignment efficiency.
In addition, in the method, because the low-frequency alternating-current magnetic field generated by each base station is generally alternating-current signals of several hertz to dozens of hertz, the wavelength corresponding to the alternating-current signals generated by the low-frequency alternating-current magnetic field is long, and the long wavelength is not influenced by NLOS and indoor scenes, the shielding object can be bypassed, so that even in a room or under the condition that the shielding object exists, the position information determined by the terminal equipment according to the signal intensity of the low-frequency alternating-current magnetic field can still be accurately applied to the narrow-beam wireless communication system, and auxiliary help is provided for subsequent beam alignment.
Drawings
Fig. 1 is a schematic structural diagram of a wireless communication system provided in the present application;
fig. 2a is a schematic diagram of a magnetic field distribution generated by a single coil according to an embodiment of the present application;
FIG. 2b is a schematic diagram of a low frequency AC magnetic field according to an embodiment of the present application;
fig. 3 is a flowchart of a method for sending location information according to an embodiment of the present application;
fig. 4a is a schematic diagram illustrating a magnetic field distribution generated by neighboring site stations in a wireless network system according to an embodiment of the present disclosure;
fig. 4b is a schematic diagram of a terminal device in a spatial position according to an embodiment of the present application;
fig. 5a is a schematic location diagram of a terminal device according to an embodiment of the present application;
fig. 5b is a schematic diagram of a network architecture according to an embodiment of the present application;
fig. 6 is a signaling flowchart of beam scanning according to an embodiment of the present application;
fig. 7a is a schematic diagram of a beam range scanned in a traversal process when UE location information is unknown according to an embodiment of the present application;
fig. 7b is a schematic diagram of a range of beams scanned when UE location information is known according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of beam management according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a location information sending apparatus according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions in the embodiments of the present application better understood and make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in further detail below with reference to the accompanying drawings.
Before describing the technical solution of the embodiment of the present application, an application scenario of the embodiment of the present application is first described with reference to the drawings.
The technical scheme of The application can be applied to a wireless communication system formed by at least one network device and at least one terminal device, such as a Long Term Evolution (LTE) system or a fifth generation mobile communication system (The 5th generation, 5G), and can also be applied to a subsequent communication system, such as a sixth generation mobile communication system or a seventh generation mobile communication system.
As shown in fig. 1, in a wireless communication system, the wireless communication system includes at least one network device and at least one terminal device, the network device may be a Base Station (BS) or a Base Transceiver Station (BTS), further, the Base Station may be a Base Station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA), may be a Base Station (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may be an evolved node b (eNB/e-NodeB) in LTE, or a next evolved node b (eNB, ng-eNB) in next generation LTE, or a Base Station (gbb) in NR, or a Base Station in a future mobile communication system or an access node in a wireless fidelity (WiFi) system, etc., the embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. In this application, the network device may be a radio access network device.
The wireless communication system shown in fig. 1 includes 3 radio base stations, specifically, includes single-sector (360 °), two-sector (180 °), and three-sector (120 °) radio base stations, and further, the single-sector or multi-sector radio base station may be any one of 2G/3G/4G/5G. Wherein each radio base station also generates an alternating magnetic field. In particular, the alternating magnetic field is typically generated by a long coil wound around a pole or mast. In addition, each radio base station further includes: the device comprises a signal source for generating an excitation signal, a data processing unit, a control unit, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), a driving circuit and the like.
Further, the radio base station further includes: one or more of Radio Remote Unit (RRU), baseband Unit (BBU), Radio Frequency Unit (RFU), Intermediate Frequency Unit (IFU), Active Antenna Unit (AAU), and the like.
The terminal device in the embodiments of the present application may refer to a device providing service and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem, such as a wireless terminal.
Further, the wireless terminal, which may be a mobile terminal such as a mobile telephone (or so-called "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more nodes via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. The wireless terminal may also be a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), a user equipment (user device), or a user equipment (user equipment, UE), and the like.
Before the technical means of the present application is introduced, first, an ac magnetic field signal and signal intensity will be described.
As shown in fig. 2a and fig. 2b, after the energized coil cuts the magnetic induction line, an alternating-current magnetic field is generated, which is generated by the coil wound on the pole of the base station, and accordingly, a magnetic induction intensity is generated under the action of the magnetic field. And the magnetic induction B and the magnetic field intensity (symbol is denoted as "H") are in a linear relationship, i.e., B ═ μ0H, the magnetic field strength is abbreviated in the examples of the present application as signal strength, denoted by "B".
Generally, in order to ensure diffraction of a wireless ac magnetic field and NLOS resistance and reduce the influence of an object such as a building on a magnetic induction signal, an excitation signal generated by an ac magnetic field is a low-frequency signal having a magnitude of several hertz (Hz) to several tens of Hz. The pole of the base station is generally perpendicular to the ground, so that the magnetic lines of force generated by the alternating current magnetic field are also perpendicular to the ground, and the signal strength generated by the magnetic field can be calculated by using formula 1.
Equation 1:
Figure BDA0002063745800000051
wherein B represents the signal intensity of the AC magnetic field, μ0Denotes the permeability in vacuum, I denotes the current strength of the excitation signal, L denotes the total length of the N-turn coil, D denotes the diameter of the one-turn coil, assuming that the diameters of the N-turn coils are all the same. The N coils are distributed along the z-axis, theta represents an azimuth angle between the position of the terminal equipment and the position of a base station, d represents a distance between the terminal equipment and the base station,
Figure BDA0002063745800000061
are vectors.
In addition, other base stations in the wireless system also generate alternating magnetic fields, and each of the alternating magnetic fields generates an alternating signal, each alternating signal corresponding to a signal strength. The at least two base stations include a base station (or associated base station) accessed by the current terminal device, such as a first base station (or simply base station 1), and further include neighboring base stations of other cells, such as a second base station (or simply base station 2), a third base station (or simply base station 3), and the like. Further, in order to avoid mutual interference between signals of low-frequency ac magnetic fields generated by adjacent base stations (or sites), the location distribution planning of the first base station and other base stations (such as the second base station or the third base station) may refer to a Cell Physical Cell Identifier (PCI) plan of a site of the wireless communication system or an Identifier plan of a location of the same site, and each base station generates an ac magnetic field according to a frequency configured by the PCI and transmits an ac signal. Wherein a frequency band of an alternating magnetic field is shared by a base station and a terminal device at the same location (or site).
In the embodiment of the present application, the signal strength generated by the low-frequency ac magnetic field at each base station may be referred to as the signal strength generated under the ac magnetic field of a frequency, and the signal strength is linearly related to the magnetic field strength of the ac magnetic field corresponding to the signal strength.
The method provided in the examples of the present application is explained in detail below.
As shown in fig. 3, the present embodiment provides a method for sending location information, specifically, the method includes:
step 101: the method comprises the steps that terminal equipment obtains first signal intensity, the first signal intensity is the total signal intensity of an nth base station which covers a first base station value of the position where the terminal equipment is located, the first base station is a base station which is accessed by the terminal equipment currently, and n is not less than 2 and is a positive integer.
For example, as shown in fig. 4a, a terminal device UE is at a position in a coverage area common to base stations 1 and 2, wherein a coil in base station 1 generates an ac magnetic field at a first frequency (f1), a coil in base station 2 generates an ac magnetic field at a second frequency (f2), and the UE is associated with base station 1, wherein base station 1 is a first base station, and n is 2. The first signal strength is the signal strength detected by the UE when the base station 1 and the base station 2 act together on the UE.
Of these, f1 and f2 are low frequencies, typically several to several tens of hertz. f2 may be the same as or different from f 1.
Further, in step 101, the terminal device may obtain the first signal strength through drive test during network optimization, or obtain the first signal strength through sensor measurement, or obtain the first signal strength through other methods.
Step 102: and the terminal equipment analyzes the first signal intensity to obtain the signal intensity of each base station respectively corresponding to the first base station and the nth base station, wherein the signal intensity of each base station is generated by an alternating current magnetic field under the action of the base station.
Specifically, for the ith base station from the first base station to the nth base station, the terminal device extracts the signal intensity of different frequency points from the first signal intensity through fourier transform, so as to obtain the signal intensity of the ith base station, wherein the signal intensity of the ith base station is represented by expression 1, and i is any value from 1 to n.
Expression 1:
Figure BDA0002063745800000062
wherein B represents the signal intensity of the AC magnetic field, μ0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of a turn of the coil of the ith base station, d represents the distance between terminal equipment and the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
For example, as shown in fig. 2b, the first base station is located at the top end of the tower with a height L, the terminal device is located at a certain position P1 in the space, a spherical coordinate system is established with the position of the first base station to which the terminal device is currently connected as an origin, the position of the first base station is obtained by measuring the longitude and latitude of the position of the first base station, a connection line between the position P1 where the terminal device is located and the first base station is projected on a horizontal plane, the projected position is d (x1, z1), and an included angle between the position d and a z-axis (toward the true north direction "N") is θ. Wherein the horizontal plane is a plane formed by an x-axis (towards the righteast direction "E") and a z-axis (towards the northeast direction "N").
As shown in fig. 4b, the projection coordinate of the terminal device on the horizontal plane (the plane formed by the x axis and the y axis) at a spatial position P1 is (x1, y1), the sphere center O is the position of the first base station, and the included angle between the projection coordinate (x1, y1) and the line with the position of the first base station as the sphere center O and the x axis is θ on the horizontal plane. In addition, the line from the position P1 to the center of sphere O forms an angle with the z-axis
Figure BDA0002063745800000071
Step 103: and the terminal equipment calculates the distance between the terminal equipment and each base station according to the signal intensity of each base station.
Specifically, for the ith base station among the first to nth base stations, the terminal device calculates the distance between its terminal device and each base station according to expression 2.
Expression 2:
Figure BDA0002063745800000072
wherein the expression 2 is generated by deforming the expression 1.
The distance between the terminal equipment and each base station is calculated by the terminal equipment according to the expression 2, wherein the distance between the terminal equipment and each base station comprises the distance d1 between the terminal equipment and the first base station, the distance d2 between the terminal equipment and the second base station, and the distance dn between the terminal equipment and the nth base station. In the example shown in fig. 5a, i is 2, the terminal device gets a first distance d1 and a second distance d 2.
Step 104: and the terminal equipment determines the position information of the terminal equipment according to the distance between the terminal equipment and each base station.
Taking the two distances to determine the position of the terminal device as an example, as shown in fig. 5a, after the terminal device calculates d1 and d2, the coordinates of the terminal device are calculated by using a triangulation method. Specifically, at least one intersection exists between a circle with the position of the first base station (base station 1) as the center, d1 as the radius, and a circle with the position of the second base station (base station 2) as the center, d2 as the radius, and one of the intersections is selected as the position coordinate of the terminal device, for example, the position coordinate of the terminal device in this embodiment is (x1, y1), and then the position coordinate of the terminal device is used as the position information of the terminal device. The position coordinates are coordinates of the terminal equipment under a spherical coordinate system constructed by the first base station, and the position coordinates can be correspondingly converted into longitude and latitude representations to obtain the actual position of the terminal equipment.
Further, if two intersection points exist in the circular areas covered by the two base stations, the process of determining one intersection point as the position coordinate of the terminal device specifically includes: as shown in fig. 5b, in a schematic diagram of a network architecture, polygons represent urban areas and each circle represents a cell covered by a base station. Assuming that the position of the first base station is O1, the position of the second base station is O2, and further base stations such as a third base station O3 may be included. Wherein there are two intersections, P1 and P2, of the first base station O1 and the second base station O2. When the terminal device is currently connected to the first base station O1, the actual position of the terminal device may be determined according to the principle of "excluding the approach to the center of the network", specifically, when there are two intersection points P1 and P2, 3 ac magnetic fields (the first base station O1, the second base station O2, and the third base station O3) corresponding to the position P1 may be calculated, and the corresponding frequencies are f1, f2, and f3, respectively; two AC magnetic fields are corresponding to the position intersection point P2, the corresponding frequencies are f1 and f2, wherein the AC magnetic field and the frequency corresponding to each base station or terminal equipment position can be preset. In this case, according to the principle of "excluding the approach to the center of the network", the intersection P1 is located close to the center of the network and has a large number of frequencies to be operated, and the intersection P2 has a small number of frequencies to be operated and is located at the edge of the network, so that the intersection P2 is selected as the actual location of the terminal device. Or, a third area may be set, where the third area may be an area in the network, and the third area overlaps with the cell covered by the base station O1 and the cell covered by the base station O2, and it is determined that a position located in the overlapping area is a virtual solution, and a position not in the overlapping area is an actual terminal position, such as a P2 position.
Optionally, the third area is a cell covered by the base station O3.
In addition, if a certain intersection point P is located in the coverage of more than two cells, that is, the position of the intersection point P corresponds to 3 or more than 3 frequencies f, since 3 f can uniquely determine a position, the position of the terminal can be uniquely determined according to the preset third area. For example, the overlapping area covered by three base stations O1, O2 and O3 (corresponding to frequencies f1, f2 and f3) can uniquely determine a position P1 as the actual position of the terminal.
In a possible case, if the circular area covered by the first base station O1 is tangent to the circular area covered by the second base station O2, i.e. there is only one intersection point, then this intersection point is the location of the terminal device. In another possible case, if the two circular areas do not have an intersection, the location of the terminal device cannot be determined by the distances of the two base stations from the terminal device, at which point other base stations and the calculated distance may be selected to determine the location information of the terminal device.
Step 105: and the terminal equipment sends the position information to the first base station.
Further, as shown in fig. 6, the method further includes:
step 106: and the first base station receives the position information and determines the scanning range of the wave beam by combining the position information of the first base station according to the position information.
Specifically, the scanning range of the beam may be obtained through calculation, beam training, and the like according to the position coordinates of the first base station and the terminal device. Wherein each location information corresponds to a beam scanning range.
Further, in an implementation manner, after the first base station acquires the location coordinates of the terminal device, according to a preset corresponding relationship between each coordinate location and a beam range, a beam range or a beam set corresponding to the location coordinates of the current terminal device may be determined, as shown in fig. 7b, the first Base Station (BS) determines that a beam set corresponding to the location coordinates (x1, y1) of the user equipment UE is hUEWherein h represents the number of wave bits, hUEDenotes the number of wave bits contained in the beam set of the UE, h in FIG. 7bUEIs 3. In addition, the first base station BS also determines the beam set h of the first base station BSBS，hBSIndicating the number of wave bits contained in the beam set of the BS. The correspondence between the beam range (or set of beams) and the number of wave bits is, for example, a beam scan range of [ -60 °, -40 ° ]]I.e. beams corresponding to 3 wave positions, respectively-60 deg. -50 deg. -40 deg.. Each beam may be represented by a beam Identification (ID).
Step 107: and the first base station sends the determined beam scanning range to the terminal equipment.
For example, the first base station transmits to the terminal device the indication information of the beam scanning range [ -60 °, -40 ° ] of the terminal device.
Step 108: and the terminal equipment receives the beam scanning range, and determines a target beam in the beam scanning range, wherein the beam scanning range corresponds to at least one beam.
Specifically, the first way is: the terminal device traverses each beam in the beam scanning range, obtains a received signal Reference Strength (RSRP) or a signal-to-noise ratio (SNR) of each beam, selects the largest one of all RSRPs, or selects the largest one of all SNRs, and takes the RSRP with the largest value or the beam corresponding to the SNR as a target beam.
The second way is: setting a threshold value, such as a preset RSRP or a preset SNR, scanning each beam corresponding to the current beam range, and when there is a RSRP corresponding to one beam that reaches the preset RSRP or an SNR value that reaches the preset SNR, taking the beam corresponding to the RSRP or the SNR as a target beam. Wherein the achieving means is greater than or equal to the preset RSRP or preset SNR.
It should be noted that, in this embodiment, the target beams are screened and determined by calculating RSRP or SNR corresponding to each beam, it should be understood that the target beams may also be determined by measuring other parameters, which is not specifically limited in this embodiment.
Step 109: the terminal device sends the beam identifier corresponding to the target beam to the first base station, so that the first base station and the terminal device can perform beam alignment of the narrow beam system according to the beam identifier.
Specifically, the process of beam alignment between the terminal device and the first base station is the same as the existing beam alignment process, so the present embodiment does not describe the specific beam scanning and beam alignment process in detail.
In the method provided by this embodiment, the terminal device calculates the location information of the terminal device according to the signal intensity of the ac magnetic field generated by the n base stations covering the location of the terminal device, and reports the location information to the currently accessed base station, so that after the base station acquires the location information of the terminal device, a beam scanning range smaller than that when the location information is not received can be determined, and the beam scanning range is fed back to the terminal device, so that the terminal device can scan a beam in a specified smaller beam range, thereby greatly reducing the beam scanning range, reducing the overhead of a beam alignment process, and improving the beam alignment efficiency.
For example, as shown in fig. 7a, when the terminal device does not report its location information, the base station needs to traverse the wave bits H contained in the base station in full spaceBSAnd a terminalThe number of wave bits H contained in the apparatusUEAt this time, the number of beams corresponding to the beam range that the terminal device and the base station need to scan is HBS*HUE(traverse the maximum statistic). FIG. 7a shows the number of wave bits H corresponding to the beam set of the BS that needs to be traversed when the base station BS does not know the location information reported by the UEBS5, the number of wave bits H that the UE needs to traverseUEAlso 5.
However, after the UE reports the location information to the BS, as shown in fig. 7b, the BS determines the number of wave bits h corresponding to the beam set according to the reported location informationBSIs 3, hBS＜HBS(ii) a Similarly, the beam set h that the UE needs to scanUECorresponding wave number hUEIs also 3, hUE＜HUETherefore, when the UE and the base station know the UE location information, the number of beams corresponding to the beam range to be scanned and traversed is hBS*hUEIs less than HBS*HUETherefore, the codebook set corresponding to the scanning beam set can be reduced, and the aim of reducing the overhead is achieved.
In addition, in the method, because the low-frequency alternating-current magnetic field generated by each base station is generally alternating-current signals of several hertz to dozens of hertz, the wavelength corresponding to the alternating-current signals generated by the low-frequency alternating-current magnetic field is long, and the long wavelength is not influenced by NLOS and indoor scenes, the shielding object can be bypassed, so that even in a room or under the shielding condition, the position information determined by the terminal equipment according to the signal intensity of the low-frequency alternating-current magnetic field can still be accurately applied to the narrow-beam wireless communication system, and assistance is provided for subsequent beam alignment.
In addition, this embodiment also provides a location information receiving method, which can be applied to the wireless system of the foregoing embodiment, for example, as shown in fig. 8, in one possible scenario, the terminal device is located in the magnetic field range covered by the wireless base station 1 and the wireless base station 2, where the frequency corresponding to the magnetic field system generated by the coil in the wireless base station 1 is f1, and the frequency corresponding to the magnetic field system generated by the coil in the wireless base station 2 is f 2. And, the terminal device accesses the radio base station 1.
Specifically, the method comprises the following steps:
the wireless base station 1 receives the position information of the terminal equipment sent by the terminal equipment, wherein the position information is determined by the terminal equipment according to at least two distances, and the wireless base station 1 determines a beam scanning range according to the position information of the terminal equipment, and the beam scanning range corresponds to the position information of the terminal equipment. Specifically, the radio base station 1 determines the beam scanning range based on the position information of the terminal device and the correspondence between the position information and the beam scanning range, which is set in advance. And finally, the wireless base station 1 sends the beam scanning range to the terminal equipment, so that the terminal equipment determines a target beam according to the beam scanning range and performs beam alignment.
Optionally, the mode of sending the beam scanning range may be sent to the terminal device through a message or information.
The position information of the terminal device is determined by the terminal device according to the distance between the terminal device and each base station, each distance is calculated by the terminal device according to the signal intensity of each base station and the expression 2, further, the signal intensity of each base station is the signal intensity of each base station corresponding to the first base station to the nth base station respectively obtained by analyzing the first signal intensity by the terminal device, the first signal intensity is the total signal intensity of the first base station to the nth base station covering the position of the terminal device, the first base station is the base station to which the terminal device is currently accessed, and n is a positive integer greater than or equal to 2.
Embodiments of the apparatus corresponding to the above-described embodiments of the method are described below.
Fig. 9 is a schematic structural diagram of a position information sending apparatus according to an embodiment of the present application. The apparatus may be the terminal device in the foregoing method embodiment, or may also be a component located in the terminal device, such as a chip. Further, the apparatus may implement all functions of the terminal device in the foregoing embodiments.
Further, as shown in fig. 9, the apparatus may include: a receiving unit 901, a processing unit 902 and a sending unit 903, in addition, the apparatus may also comprise a storage unit or other units or modules.
Specifically, the receiving unit 901 is configured to obtain a first signal strength, where the first signal strength is a total signal strength from a first base station to an nth base station covering a location of a terminal device, the first base station is a base station to which the terminal device is currently accessed, and n is an integer greater than or equal to 2; the processing unit 902 is configured to analyze the first signal strength to obtain a signal strength of each base station corresponding to the first base station to the nth base station, where the signal strength of each base station is generated by an ac magnetic field acting on the base station; the processing unit 902 is further configured to calculate a distance between the terminal device and each base station according to the signal strength of each base station, and determine location information of the terminal device according to the distance between the terminal device and each base station; the sending unit 903 is configured to send the location information to the first base station.
Optionally, in a specific implementation manner, the receiving unit 901 is specifically configured to obtain, for an ith base station of the first to nth base stations, a signal strength of the ith base station through fourier transform, where the signal strength of the ith base station is represented by expression 1.
Expression 1:
Figure BDA0002063745800000101
wherein B represents the signal intensity of the AC magnetic field, μ0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of a turn of the coil of the ith base station, d represents the distance between terminal equipment and the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
Optionally, in another specific implementation manner, the processing unit 902 is specifically configured to calculate, for an ith base station of the first to nth base stations, a distance between the terminal device and the ith base station according to expression 2;
expression 2:
Figure BDA0002063745800000102
wherein d represents the distance between the terminal device and the ith base station, B represents the signal intensity of the alternating current magnetic field of the ith base station, and mu0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of the coil of the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
Optionally, in another specific implementation manner, the processing unit 902 is specifically configured to calculate coordinates of the terminal device according to distances between the terminal device and at least two base stations and a triangulation method, and use the coordinates as the location information of the terminal device.
Optionally, in another specific implementation manner, the receiving unit 901 is further configured to receive a beam scanning range sent by the base station after the sending unit 903 sends the location information to the first base station, where the beam scanning range is determined according to the location information; the processing unit 902 is further configured to determine a target beam in the beam scanning range, where the beam scanning range corresponds to at least one beam; the sending unit 903 is further configured to send a beam identifier corresponding to the target beam to the first base station.
Optionally, in another specific implementation manner, the processing unit 902 is specifically configured to traverse each beam in the beam scanning range to obtain RSRP or SNR of each beam; selecting a maximum value of all the RSRPs or SNRs, or selecting the RSRPs or SNRs reaching a preset threshold value, and taking the RSRPs or SNRs of the maximum value or the beams corresponding to the RSRPs or SNRs reaching the preset threshold value as the target beams.
In this embodiment, the apparatus determines the location information of the terminal device through the ac magnetic field system, and reports the location information of the terminal device to a network device, such as a base station, for assisting the base station to achieve efficient beam alignment, so that the apparatus performs beam scanning and beam alignment in a specified area, signaling overhead in the narrow beam scanning and alignment process is greatly reduced, beam alignment speed and tracking capability of the narrow beam wireless communication system are improved, and meanwhile, the problem that beam management of the narrow beam system cannot be assisted due to GPS failure in an indoor scene applied to a millimeter wave hotspot in a gymnasium, a studio, and the like can be solved.
In a specific implementation, an embodiment of the present application further provides a terminal device, and refer to fig. 10, which is a schematic structural diagram of the terminal device provided in the embodiment of the present application. The device may implement the functions or operations of the terminal device in the foregoing embodiments.
As shown in fig. 10, the terminal device may include a transceiver 1001, a processor 1002, and a memory 1003, wherein the memory 1003 may be used to store codes or data. The transceiver 1001 may include components such as a receiver, a transmitter, and an antenna, and the communication device may include more or less components, or some components may be combined, or different component arrangements, which are not limited in this application.
The processor 1002 is a control center of the communication apparatus, connects various parts of the entire communication apparatus with various interfaces and lines, and executes various functions of the communication apparatus or processes data by running or executing software programs or modules stored in the memory 1003 and calling data stored in the memory 1003.
Alternatively, the processor 1002 may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs with the same or different functions. For example, the processor may include only a Central Processing Unit (CPU), or may be a combination of a GPU, a Digital Signal Processor (DSP), and a control chip (e.g., a baseband chip) in the transceiver module. In various embodiments of the present application, the CPU may be a single arithmetic core or may include multiple arithmetic cores.
Optionally, the processor 1002 includes a processing chip, which may include one or more random access memory units, which may be used to store instructions or computer programs.
The transceiver 1001 is used to establish a communication channel through which a terminal device connects to a communication network, thereby enabling communication transmission between the terminal device and other devices (such as a base station). The transceiver may be a module that performs a transceiving function. For example, the transceiver may include a Wireless Local Area Network (WLAN) module, a bluetooth module, a baseband (base band) module, and other communication modules, and a Radio Frequency (RF) circuit corresponding to the communication device, and is configured to perform WLAN communication, bluetooth communication, infrared communication, and/or cellular communication system communication, such as Wideband Code Division Multiple Access (WCDMA) and/or High Speed Downlink Packet Access (HSDPA). The transceiver is used to control the communication of the components in the communication device and may support direct memory access (direct memory access).
In various embodiments of the present application, the various transceiver modules in the transceiver are typically in the form of integrated circuit chips (integrated circuit chips) and may be selectively combined without including all the transceiver modules and corresponding antenna groups. For example, the transceiver may include only a baseband chip, a radio frequency chip, and corresponding antenna to provide communication functions in a cellular communication system. The communication device may be connected to a cellular network (cellular network) or the internet (internet) via a communication connection established by the transceiver, such as a wireless local area network access or a WCDMA access.
The memory 1003 may include a volatile memory (volatile memory), such as a Random Access Memory (RAM); non-volatile memory (non-volatile memory) such as flash memory (flash memory), hard disk (HDD) or solid-state drive (SSD); the memory may also comprise a combination of memories of the kind described above. The memory may store a program or code or data, and the processor 1102 in the communication device may implement the functions of the communication apparatus by executing the program or code.
In the embodiment of the present application, the processor 1002 and the transceiver 1001 may be separate or coupled to implement all or part of the steps in the method for sending location information in the foregoing method embodiment. For example, when the device is used as a terminal device, such as a UE, in the foregoing embodiment, the transceiver 1001 is configured to obtain a first signal strength, where the first signal strength is a total signal strength of the terminal device in a wireless network under different ac magnetic fields acted by different base stations, where the wireless network includes at least two base stations, where one of the base stations is a base station to which the terminal device is currently connected; the processor 1002 is configured to analyze the first signal strength to obtain at least two second signal strengths, where each of the second signal strengths is generated by an ac magnetic field under the action of a base station; calculating the distance between the terminal equipment and each base station according to each second signal intensity to obtain at least two pieces of distance information, and determining the position information of the terminal equipment according to the at least two pieces of distance information; the transceiver 1001 is further configured to send the location information to a base station to which the terminal device is currently accessing.
Further, the functions to be implemented by the receiving unit 901 and the transmitting unit 903 in fig. 9 may be implemented by the transceiver 1001 of the terminal device, or by the transceiver 1001 controlled by the processor 1002, and the functions to be implemented by the processing unit 902 may be implemented by the processor 1002.
The embodiment also provides a wireless communication system, which may be the system shown in fig. 1 or fig. 8, for implementing the method described in the foregoing fig. 3 or fig. 6. In addition, the system includes at least one base station and at least one terminal device, where the base station may have a structure as shown in fig. 10, and includes a transceiver, a processor, and a memory, and is configured to implement a location information receiving method on a network side, and send a determined beam range to the terminal device. The terminal device may have the structure shown in fig. 10, and implement the location information transmitting method in the foregoing embodiment. When the method is used for determining the position information of the terminal equipment and reporting the position information to the base station, the following beneficial effects can be achieved:
firstly, only the wireless base station at the same site needs to be added with alternating current magnetic field system equipment during deployment, and the cost is low.
Secondly, the wireless base station or the station described in this embodiment is implemented by only installing a pole, and is easy to deploy.
Thirdly, the frequency point planning of the alternating current magnetic field generated by each base station can refer to the information of the physical cell identification PCI and the like of the wireless base station at the same site, and the planning is simple and easy.
In addition, the present application also provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments of the data transmission method provided in the present application when executed. The storage medium can be a magnetic disk, an optical disk, a read-only memory ROM or a random access memory RAM.
In the above embodiments, all or part may be implemented by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
Wherein the computer program product comprises one or more computer instructions, such as a switching instruction, which when loaded and executed by a computer, causes a process or function according to the various embodiments described herein to be performed, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device.
The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, from one network node, computer, server, or data center to another site, computer, or server by wire or wirelessly.
The computer-readable storage medium can be any available medium that can be accessed by a computer or a storage device, such as a server, data center, etc., that incorporates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape, an optical medium (e.g., a DVD), or a semiconductor medium, such as a solid state disk, SSD, or the like.
The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Those skilled in the art will clearly understand that the techniques in the embodiments of the present application may be implemented by way of software plus a required general hardware platform. Based on such understanding, the technical solutions in the embodiments of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present invention.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, as for the network device/node or the device, since it is basically similar to the method embodiment, the description is simple, and the relevant points can be referred to the description in the method embodiment.
The above-described embodiments of the present application do not limit the scope of the present application.

Claims (14)

1. A method for transmitting location information, the method comprising:
the method comprises the steps that terminal equipment obtains first signal intensity, wherein the first signal intensity is the total signal intensity from a first base station to an nth base station covering the position of the terminal equipment, the first base station is a base station which is accessed by the terminal equipment currently, and n is an integer which is more than or equal to 2;
the terminal equipment analyzes the first signal intensity to obtain signal intensity respectively corresponding to each base station from the first base station to the nth base station, wherein the signal intensity of each base station is generated by an alternating current magnetic field under the action of the base station;
the terminal equipment calculates the distance between the terminal equipment and each base station according to the signal intensity of each base station;
the terminal equipment determines the position information of the terminal equipment according to the distance between the terminal equipment and each base station;
and the terminal equipment sends the position information to the first base station.
2. The method of claim 1, wherein the terminal device analyzes the first signal strength to obtain a signal strength corresponding to each of the first through nth base stations, respectively, and comprises:
for the ith base station from the first base station to the nth base station, the terminal device obtains the signal intensity of the ith base station by performing Fourier transform on the first signal intensity, wherein the signal intensity of the ith base station is expressed by expression 1;
expression 1:
Figure FDA0002063745790000011
wherein B represents the signal intensity of the AC magnetic field, μ0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of a turn of the coil of the ith base station, d represents the distance between terminal equipment and the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
3. The method of claim 1 or 2, wherein the terminal device calculates the distance between the terminal device and each base station according to the signal strength of each base station, and comprises:
for the ith base station from the first base station to the nth base station, the terminal equipment calculates the distance between the terminal equipment and the ith base station according to expression 2;
expression 2:
Figure FDA0002063745790000012
wherein d represents the distance between the terminal device and the ith base station, B represents the signal intensity of the alternating current magnetic field of the ith base station, and mu0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of the coil of the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
4. The method according to any one of claims 1-3, wherein the determining, by the terminal device, the location information of the terminal device according to the distance between the terminal device and each base station comprises:
and the terminal equipment calculates the coordinates of the terminal equipment according to the distances between the terminal equipment and at least two base stations and a triangulation method, and the coordinates are used as the position information of the terminal equipment.
5. The method according to any of claims 1-4, wherein after the terminal device sends the location information to the first base station, further comprising:
the terminal equipment receives a beam scanning range sent by the first base station, and the beam scanning range is determined according to the position information;
the terminal equipment determines a target beam in the beam scanning range, wherein the beam scanning range corresponds to at least one beam;
and the terminal equipment sends the beam identifier corresponding to the target beam to the first base station.
6. The method of claim 5, wherein the terminal device determines a target beam in the beam scanning range, comprising:
the terminal equipment traverses each beam in the beam scanning range to obtain the reference signal reference strength RSRP or the signal-to-noise ratio SNR of each beam;
and the terminal equipment selects the maximum value of all the RSRPs or SNRs, or selects the RSRPs or SNRs reaching a preset threshold value, and takes the RSRPs or SNRs of the maximum value or the beams corresponding to the RSRPs or SNRs reaching the preset threshold value as the target beams.
7. A position information transmitting apparatus, characterized in that the apparatus comprises:
a receiving unit, configured to obtain a first signal strength, where the first signal strength is a total signal strength from a first base station to an nth base station that cover a location of a terminal device, the first base station is a base station to which the terminal device is currently accessed, and n is an integer greater than or equal to 2;
the processing unit is used for analyzing the first signal intensity to obtain the signal intensity of each base station respectively corresponding to the first base station to the nth base station, wherein the signal intensity of each base station is generated by an alternating current magnetic field under the action of the base station; calculating the distance between the terminal equipment and each base station according to the signal intensity of each base station, and determining the position information of the terminal equipment according to the distance between the terminal equipment and each base station;
a sending unit, configured to send the location information to the first base station.
8. The apparatus of claim 7,
the processing unit is specifically configured to obtain, for an ith base station of the first to nth base stations, a signal strength of the ith base station through fourier transform, where the signal strength of the ith base station is represented by expression 1;
expression 1:
Figure FDA0002063745790000021
wherein B represents the signal intensity of the AC magnetic field, μ0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of a turn of the coil of the ith base station, d represents the distance between terminal equipment and the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
9. The apparatus according to claim 7 or 8,
the processing unit is specifically configured to calculate, for an ith base station of the first to nth base stations, a distance between the terminal device and the ith base station according to expression 2;
expression 2:
Figure FDA0002063745790000022
wherein d represents the distance between the terminal device and the ith base station, B represents the signal intensity of the alternating current magnetic field of the ith base station, and mu0The magnetic permeability in vacuum is represented, N represents the number of turns of a coil of the ith base station, I represents the current intensity of an excitation signal generated by an alternating current magnetic field of the ith base station, S represents the cross-sectional area of the coil of the ith base station, and theta represents the azimuth angle between the position of the terminal equipment and the position of the ith base station.
10. The apparatus according to any one of claims 7 to 9,
the processing unit is specifically configured to calculate coordinates of the terminal device according to distances between the terminal device and at least two base stations and a triangulation method, and use the coordinates as position information of the terminal device.
11. The apparatus according to any one of claims 7 to 10,
the receiving unit is further configured to receive a beam scanning range sent by the first base station after the sending unit sends the location information to the first base station, where the beam scanning range is determined according to the location information;
the processing unit is further configured to determine a target beam in the beam scanning range, where the beam scanning range corresponds to at least one beam;
the sending unit is further configured to send a beam identifier corresponding to the target beam to the first base station.
12. The apparatus of claim 11,
the processing unit is specifically configured to traverse each beam in the beam scanning range to obtain an RSRP or an SNR of each beam; selecting a maximum value of all the RSRPs or SNRs, or selecting the RSRPs or SNRs reaching a preset threshold value, and taking the RSRPs or SNRs of the maximum value or the beams corresponding to the RSRPs or SNRs reaching the preset threshold value as the target beams.
13. A terminal device comprising a processor, the processor coupled with a memory,
the memory to store instructions;
the processor to execute the instructions in the memory to cause the network device to perform the method of any of claims 1 to 6.
14. A computer-readable storage medium having instructions stored therein, wherein,
when executed, implement the method of any of claims 1 to 6.
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