CN110730056B

CN110730056B - Positioning reference signal transmission method, terminal and network equipment

Info

Publication number: CN110730056B
Application number: CN201810699858.XA
Authority: CN
Inventors: 司晔; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2021-07-27
Anticipated expiration: 2038-06-29
Also published as: CN110730056A; WO2020001380A1

Abstract

The invention discloses a positioning reference signal transmission method, a terminal and network equipment, wherein the method comprises the following steps: acquiring a target transmission bandwidth of a Positioning Reference Signal (PRS); wherein the target transmission bandwidth is associated with at least one of an active bandwidth part, BWP, a cell transmission bandwidth and a positioning performance indicator; the PRS is received over at least a portion of a target transmission bandwidth. The embodiment of the invention can accurately measure the PRS so as to accurately estimate the position of the terminal and improve the information transmission performance.

Description

Positioning reference signal transmission method, terminal and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a positioning reference signal transmission method, a terminal, and a network device.

Background

In a fifth Generation (5th Generation, 5G) mobile communication system, or New Radio (NR) system, a cell supports up to 400MHz of system bandwidth at maximum to support greater system and user throughput. To facilitate low-cost terminal implementation, the NR system introduces dynamic flexible Bandwidth allocation, which divides the system Bandwidth into multiple Bandwidth parts (BWPs) to support access of narrowband terminals or power-saving mode terminals.

Where the NR system further supports different parameter settings (Numerology) for different BWP configurations, the network device may refrain from configuring the terminal with a corresponding frequency band when configuring BWP for the terminal if the terminal cannot support Numerology for the cell. The network device may configure a BWP set available to each cell for the terminal through Radio Resource Control (RRC) signaling, and dynamically switch the BWP to be started through Level1 (L1) signaling. To estimate the position of the terminal, a Positioning Reference Signal (PRS) is introduced. Since the terminal supports multiple available BWPs, the terminal cannot determine which PRS is measured on which BWP, and if the PRS is measured on the wrong BWP, the positioning of the terminal may be inaccurate, which may affect the information transmission performance.

Disclosure of Invention

The embodiment of the invention provides a positioning reference signal transmission method, a terminal and network equipment, and aims to solve the problems that the measurement of a positioning reference signal is inaccurate and the information transmission performance is influenced.

In a first aspect, an embodiment of the present invention provides a method for transmitting a positioning reference signal, where the method is applied to a terminal, and includes:

acquiring a target transmission bandwidth of a Positioning Reference Signal (PRS); wherein the target transmission bandwidth is associated with at least one of an active bandwidth part, BWP, a cell transmission bandwidth and a positioning performance indicator;

the PRS is received over at least a portion of a target transmission bandwidth.

In a second aspect, an embodiment of the present invention further provides a terminal, including:

an obtaining module, configured to obtain a target transmission bandwidth of a positioning reference signal PRS; wherein the target transmission bandwidth is associated with at least one of an active bandwidth part, BWP, a cell transmission bandwidth and a positioning performance indicator;

a receiving module configured to receive a PRS over at least a portion of a target transmission bandwidth.

In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes a processor, a memory, and a computer program stored in the memory and running on the processor, and when the computer program is executed by the processor, the steps of the positioning reference signal transmission method are implemented.

In a fourth aspect, an embodiment of the present invention provides a method for transmitting a positioning reference signal, which is applied to a network device, and includes:

configuring a target transmission bandwidth of a Positioning Reference Signal (PRS) according to at least one of an active bandwidth part (BWP), a cell transmission bandwidth and a positioning performance index;

the PRS is transmitted over a target transmission bandwidth.

In a fifth aspect, an embodiment of the present invention provides a network device, including:

a configuration module, configured to configure a target transmission bandwidth of a positioning reference signal PRS according to at least one of an active bandwidth part BWP, a cell transmission bandwidth, and a positioning performance indicator;

a sending module, configured to send the PRS over the target transmission bandwidth.

In a sixth aspect, an embodiment of the present invention further provides a network device, where the network device includes a processor, a memory, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the steps of the positioning reference signal transmission method described above are implemented.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program implements the steps of the above-mentioned method for transmitting positioning reference signals on a terminal side, or implements the steps of the above-mentioned method for transmitting positioning reference signals on a network device side.

Therefore, by adopting the scheme, the embodiment of the invention can accurately measure the PRS so as to accurately estimate the position of the terminal and improve the information transmission performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 shows a block diagram of a mobile communication system to which an embodiment of the present invention is applicable;

fig. 2 is a flowchart illustrating a positioning reference signal transmission method of a terminal according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the positioning principle of the OTDOA method according to the embodiment of the present invention;

FIG. 4 is a flow chart of an OTDOA positioning method according to an embodiment of the present invention;

fig. 5 is a schematic block diagram of a terminal according to an embodiment of the present invention;

FIG. 6 shows a block diagram of a terminal of an embodiment of the invention;

fig. 7 is a flowchart illustrating a positioning reference signal transmission method of a network device according to an embodiment of the present invention;

FIG. 8 is a block diagram of a network device according to an embodiment of the present invention;

fig. 9 shows a block diagram of a network device according to an embodiment of the invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise 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. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a terminal Device or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station or a core network, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.) or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, and the Base Station is not limited to a specific technical vocabulary as long as the same technical effect is achieved.

The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 12 to terminal 11). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission. Downlink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both.

It should be noted that the positioning reference signal transmission method in the embodiment of the present invention is only exemplified by the NR system, and other systems may also be applicable.

An embodiment of the present invention provides a method for transmitting a positioning reference signal, which is applied to a terminal, and as shown in fig. 2, the method includes the following steps:

step 21: and acquiring a target transmission bandwidth of the positioning reference signal PRS.

Wherein the target transmission bandwidth is associated with at least one of an active bandwidth part BWP, a cell transmission bandwidth and a positioning performance indicator. The network device configures a target transmission bandwidth for the PRS according to at least one of a bandwidth for activating BWP, a cell transmission bandwidth and a positioning performance index, wherein the positioning performance index may include but is not limited to a positioning accuracy index and a positioning delay index.

In a certain cell, a network device configures an available BWP set for a terminal through high-layer signaling, and the terminal operates in one active BWP in the BWP set. Wherein, the parameter set Numerology under the same BWP is the same, and the Numerology includes the set of parameters such as subcarrier spacing and cyclic prefix type.

Step 22: the PRS is received over at least a portion of a target transmission bandwidth.

The terminal receives the PRS on a partial transmission bandwidth of the target transmission bandwidth on which the PRS is received. At least part of the transmission bandwidth may be the whole of the target transmission bandwidth or part of the target transmission bandwidth, and the terminal may determine at least part of the transmission bandwidth to receive the PRS according to the activated BWP or other factors, so as to improve the accuracy of receiving the PRS and improve the accuracy of estimating the position of the terminal.

In one embodiment, PRS is used in an Observed Time Difference of Arrival (OTDOA) method, a terminal does not acquire an accurate Time of Arrival (TOA), and as shown in fig. 3, an estimated location is determined by the Time Difference of Arrival (TDOA) of PRS transmitted by at least three network devices (network device 1, network device 2, and network device 3), i.e., by relative Time rather than absolute Time. The network device 1 is a base station of a serving cell to which the terminal belongs, and the network device 2 and the network device 3 are base stations of neighboring cells of the terminal. From the principle of OTDOA, three network devices participating in positioning can limit the terminal in a very small area (as shown by the shaded portion in fig. 3), and one network device is further added to limit the terminal in another area, and the range of the terminal position can be narrowed by taking the overlapped portion. Therefore, the increased number of network devices participating in positioning will result in more accurate positioning accuracy.

Further, as shown in fig. 4, the OTDOA positioning method includes the following steps:

step 41: the network device generates the PRS, and transmits over the target channel.

Step 42: the terminal receives the corresponding PRS on the target transmission channel.

Step 43: and performing time domain correlation on the received PRS and the local signal to obtain a time delay power spectrum. Where the local signal is generated from the positioning assistance data obtained by the terminal and can be regarded as the original (non-channel passed) positioning reference signal time domain signal. In LTE, a terminal interacts with a serving cell base station of a location server E-SMLC through an LPPa protocol to obtain positioning auxiliary data or positioning measurement quantity. Such assistance data includes, but is not limited to: information of the serving cell (e.g., information of physical cell identity, positioning reference signal configuration, cell frequency, etc.), and information of the neighbor cell (e.g., information of physical cell identity, positioning reference signal configuration, cell frequency, etc. of the neighbor cell). The neighbor cell is a cell which is obtained after roughly distinguishing the geographical position of the terminal in advance and is beneficial to measurement.

Step 44: and searching a first arrival path according to the time delay power spectrum, and determining the TOA from each network device to the terminal.

Step 45: and calculating the Reference Signal Time Difference (RSTD) from the serving cell and other adjacent cells to the terminal, wherein the value of the RSTD of the terminal is the Difference of the TOAs.

Step 46: and estimating the position coordinates of the terminal by adopting a preset positioning algorithm according to the RSTD.

In this way, by acquiring a target transmission bandwidth associated with at least one of the activation bandwidth part BWP, the cell transmission bandwidth, and the positioning performance index, the reception accuracy of the PRS by the terminal can be improved to improve the accuracy of the terminal position estimation.

In one embodiment, the target transmission bandwidth may be associated with active BWP. For example: the target transmission bandwidth is the smaller one of the bandwidth for activating BWP and the preset bandwidth. It is assumed that a bandwidth for activating BWP is N Physical Resource Blocks (PRBs), a target transmission bandwidth configured for PRS by the network device is B PRBs, and a preset bandwidth is X PRBs. Then B may take the smaller of N and some value X. I.e., B ═ min { N, X }.

Alternatively, the target transmission bandwidth is a bandwidth for activating BWP. Assume that the bandwidth for activating BWP is N PRBs, the target transmission bandwidth configured for PRS by the network device is B PRBs, and the value of B is the same as the bandwidth N for activating BWP, i.e. B equals to N.

It is worth pointing out that the bandwidth for activating BWP should be greater than or equal to a preset bandwidth threshold, where the preset bandwidth threshold is predefined, configured by a network device, or determined by a terminal. That is, when configuring PRS for positioning, the bandwidth configured for active BWP by the network device has a minimum value, and it is not possible to perform positioning or guarantee positioning accuracy because the active BWP is too small. Or, the target transmission bandwidth is a preset bandwidth. Assume that a target transmission bandwidth configured for the PRS by the network device is B PRBs, and a preset bandwidth is X PRBs. Then B may take the value of the preset bandwidth X. I.e., B ═ X.

It is worth pointing out that the preset bandwidth is predefined or configured for the network device.

When the preset bandwidth is configured for the network device, the preset bandwidth is configured for the network device by at least one of the following modes: radio resource control signaling configuration, Media Access Control (MAC) layer signaling configuration and Downlink Control Information (DCI) signaling indication. That is, the network device may perform the indication alone in any one of the above manners, or perform the combined indication in at least two of the above manners, for example, the network device configures a candidate bandwidth set including a plurality of preset bandwidths through RRC signaling, and selects one of the candidate bandwidth sets as the preset bandwidth X through MAC layer signaling or DCI indication. It should be noted that the above joint indication manner is only an exemplary one, and joint indication manners of other combinations may also be applicable to the present embodiment.

The above describes an embodiment in which the target transmission bandwidth is associated with the active BWP bandwidth, and the following present embodiment further describes an example in which the target transmission bandwidth is associated with a positioning performance index. That is, the target transmission bandwidth may be associated with a positioning performance index configured on the network device side, and the positioning performance index may include a positioning accuracy index, a positioning delay index, and the like.

When the positioning performance index comprises a positioning precision index, the larger the PRS bandwidth is, the longer the used pseudorandom sequence length is, the better the autocorrelation performance is, and the higher the positioning precision is. Therefore, the target transmission bandwidth is positively correlated with the positioning accuracy index. The term "positive correlation" as used herein means: when the required positioning accuracy index is higher, configuring a relatively larger target transmission bandwidth for the PRS; when the required positioning accuracy is not high, a relatively small target transmission bandwidth is configured for the PRS, so that the overhead is saved.

When the positioning performance index comprises a positioning delay index, the shorter the PRS bandwidth is, the shorter the length of the used pseudo random sequence is, and the faster the calculation speed is when the correlation calculation is carried out. The target transmission bandwidth is therefore inversely related to the positioning delay indicator. The term negative correlation here means: when the required positioning time delay is small, configuring a relatively small target transmission bandwidth for the PRS; when the required positioning delay can be larger, a relatively larger target transmission bandwidth can be configured for the PRS to improve the positioning accuracy.

On the other hand, embodiments of the present invention will further describe how to receive the PRS over at least a portion of the target transmission bandwidth in conjunction with the following scenario, i.e., how to determine at least a portion of the target transmission bandwidth.

Scenario one, where PRS is based on cell configuration, PRS is received on the overlapping portion of the target transmission bandwidth with active BWP.

In this scenario, in a certain cell, the network device configures, through high-layer signaling, an available BWP set for the terminal, and at a certain time, the terminal operates in a certain active BWP, where the active BWP has a width of N PRBs. In the cell, the network device configures a target transmission bandwidth for the PRS according to the transmission bandwidth of the cell, that is, the network device configures the PRS based on the cell and configures the PRS to cover the whole carrier bandwidth. When measuring the PRS, the terminal only measures the PRS in the active BWP.

And secondly, receiving the PRS on a target transmission bandwidth corresponding to the activated BWP under the condition that the PRS is configured based on the BWP.

In this scenario, in a certain cell, the network device configures, through high-layer signaling, an available BWP set for the terminal, and at a certain time, the terminal operates in a certain active BWP, where the active BWP has a width of N PRBs. In the cell, the network device configures a target transmission bandwidth for the PRS according to the bandwidth of the active BWP, i.e., the network device configures the PRS under the active BWP, and the terminal can measure the PRS in the active BWP.

Further, when BWP handover occurs, i.e. the terminal activates a new BWP and deactivates the current BWP, the network device configures PRS under the new activated BWP. In the positioning calculation, the terminal may calculate TOA separately for PRSs before and after BWP handover and then average the TOA.

For example: the network equipment in cell a configures PRS with Numerology u, and uses (k, l) to represent the time-frequency position of a Resource Element (RE) occupied by the PRS, where l represents an OFDM symbol sequence number in a slot (slot), and k represents the frequency-domain position when Numerology u. The starting point of the frequency domain position of the PRS is subcarrier 0 of the common resource block 0 of the cell a, that is, point a of the cell a, and correspondingly, k is 0. The terminal then only needs to measure the PRS in the active BWP.

When the terminal wants to perform BWP handover, if Numerology of the new active BWP is the same as the previous active BWP, the subcarrier spacing after handover, OFDM symbol width and slot number within 1 radio frame are unchanged. On a certain OFDM symbol, the PRS sequence can still use the PRS sequence which is generated before the BWP is switched, and the sequence occupied by the new active BWP is directly used during mapping.

If Numerology of the new active BWP is different from the previous active BWP, the subcarrier spacing changes, the OFDM symbol length changes, and the slot number of 1 radio frame changes. On a certain OFDM symbol, the network device wants to regenerate a new PRS.

The arrival time information obtained before and after the BWP handover may be averaged in consideration of the fact that the terminal has little change in position before and after the BWP handover. Assume that the obtained arrival time information before BWP switching is TOA1, the obtained arrival time after BWP switching is TOA2, and the average TOA is (TOA1+ TOA 2)/2. The terminal reports the calculated TOA to the network side, the network equipment calculates the difference RSTD of the TOAs of the plurality of cells, and the position coordinate of the terminal is calculated through a preset positioning algorithm.

And a third scenario, receiving the PRS on the overlapped part of the target transmission bandwidth and the measurement GAP.

In this scenario, terminal measurements on PRS may not be limited to within active BWP. When at least part of the measurement GAP is not within the bandwidth of the active BWP, e.g., the bandwidth of the measurement GAP is greater than the bandwidth of the active BWP, the terminal is allowed to receive PRS on the overlapping portion of the measurement GAP and the target transmission bandwidth.

Wherein, measuring the bandwidth of the GAP comprises: at least a portion of bandwidth for active BWP and/or at least a portion of bandwidth for inactive BWP. In addition, the bandwidth of the measurement GAP may also be larger than the bandwidth of the active BWP.

And fourthly, receiving the PRS on the overlapped part of the target transmission bandwidth and the non-activated BWP.

In this scenario, terminal measurements on PRS may not be limited to within active BWP. When at least a portion of the target transmission bandwidth is not within the bandwidth of the active BWP, e.g., the target transmission bandwidth is greater than the bandwidth of the active BWP, the terminal is allowed to receive PRS on the overlapping portion of the target transmission bandwidth and the inactive BWP.

In the positioning reference signal transmission method of the embodiment of the invention, the terminal acquires the target transmission bandwidth associated with at least one of the activated bandwidth part BWP, the cell transmission bandwidth and the positioning performance index, and detects the PRS in at least part of the target transmission bandwidth, so that the PRS can be accurately measured, the position of the terminal can be accurately estimated, and the information transmission performance can be improved.

The foregoing embodiments describe positioning reference signal transmission methods in different scenarios, and further describe a terminal corresponding to the method with reference to the accompanying drawings.

As shown in fig. 5, a terminal 500 according to an embodiment of the present invention can obtain a target transmission bandwidth of a positioning reference signal PRS in the foregoing embodiment; wherein the target transmission bandwidth is associated with at least one of an active bandwidth part, BWP, a cell transmission bandwidth and a positioning performance indicator; receiving details of the PRS method on at least a part of the transmission bandwidth of the target transmission bandwidth, and achieving the same effect, the terminal 500 specifically includes the following functional modules:

an obtaining module 510, configured to obtain a target transmission bandwidth of a positioning reference signal PRS; wherein the target transmission bandwidth is associated with at least one of an active bandwidth part, BWP, a cell transmission bandwidth and a positioning performance indicator;

a receiving module 520 configured to receive the PRS over at least a portion of the target transmission bandwidth.

Wherein, the target transmission bandwidth is:

activating the smaller one of the bandwidth of the BWP and the preset bandwidth;

or, activating bandwidth for BWP;

alternatively, the bandwidth is preset.

The preset bandwidth is predefined, or the preset bandwidth is configured for the network device.

The preset bandwidth is configured for the network equipment through at least one of the following modes:

radio Resource Control (RRC) signaling configuration;

media Access Control (MAC) layer signaling configuration;

and Downlink Control Information (DCI) signaling indication.

The bandwidth for activating the BWP is greater than or equal to a preset bandwidth threshold, where the preset bandwidth threshold is predefined, configured by a network device, or determined by a terminal.

The positioning performance index comprises a positioning precision index, and the target transmission bandwidth is positively correlated with the positioning precision index.

The positioning performance index comprises a positioning time delay index, and the target transmission bandwidth is inversely related to the positioning time delay index.

Wherein the receiving module 520 comprises one of:

a first receiving sub-module for receiving the PRS on an overlapping portion of the target transmission bandwidth with the active BWP in case of the PRS based on the cell configuration;

a second receiving sub-module, configured to receive, on a condition that the PRS is configured based on the BWP, the PRS on a target transmission bandwidth corresponding to the active BWP;

a third receiving submodule, configured to receive a PRS over an overlapping portion of the target transmission bandwidth and the measurement GAP;

a fourth receiving submodule, configured to receive the PRS over an overlapping portion of the target transmission bandwidth and the inactive BWP.

Wherein, measuring the bandwidth of the GAP comprises: at least a portion of bandwidth for active BWP and/or at least a portion of bandwidth for inactive BWP.

It is worth pointing out that, the terminal of the embodiment of the present invention obtains the target transmission bandwidth associated with at least one of the activated bandwidth portion BWP, the cell transmission bandwidth, and the positioning performance index, detects the PRS in at least a portion of the target transmission bandwidth, and can accurately measure the PRS to accurately estimate the location of the terminal, thereby improving the information transmission performance.

To better achieve the above object, further, fig. 6 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present invention, where the terminal 60 includes, but is not limited to: radio frequency unit 61, network module 62, audio output unit 63, input unit 64, sensor 65, display unit 66, user input unit 67, interface unit 68, memory 69, processor 610, and power supply 611. Those skilled in the art will appreciate that the terminal configuration shown in fig. 6 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

Wherein the radio frequency unit 61 is used for

The processor 610 receives and transmits data under control, and is specifically configured to acquire a target transmission bandwidth of the positioning reference signal PRS; wherein the target transmission bandwidth is associated with at least one of an active bandwidth part, BWP, a cell transmission bandwidth and a positioning performance indicator; receiving a PRS over at least a portion of a target transmission bandwidth;

the terminal of the embodiment of the invention acquires the target transmission bandwidth associated with at least one of the activated bandwidth part BWP, the cell transmission bandwidth and the positioning performance index, detects the PRS in at least part of the target transmission bandwidth, and can accurately measure the PRS so as to accurately estimate the position of the terminal and improve the information transmission performance.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 61 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 610; in addition, the uplink data is transmitted to the base station. Typically, the radio frequency unit 61 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 61 can also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 62, such as to assist the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 63 may convert audio data received by the radio frequency unit 61 or the network module 62 or stored in the memory 69 into an audio signal and output as sound. Also, the audio output unit 63 may also provide audio output related to a specific function performed by the terminal 60 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 63 includes a speaker, a buzzer, a receiver, and the like.

The input unit 64 is used to receive an audio or video signal. The input Unit 64 may include a Graphics Processing Unit (GPU) 641 and a microphone 642, and the Graphics processor 641 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 66. The image frames processed by the graphic processor 641 may be stored in the memory 69 (or other storage medium) or transmitted via the radio frequency unit 61 or the network module 62. The microphone 642 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 61 in case of the phone call mode.

The terminal 60 also includes at least one sensor 65, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 661 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 661 and/or a backlight when the terminal 60 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 65 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 66 is used to display information input by the user or information provided to the user. The Display unit 66 may include a Display panel 661, and the Display panel 661 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 67 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 67 includes a touch panel 671 and other input devices 672. The touch panel 671, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 671 (e.g., operations by a user on or near the touch panel 671 using a finger, a stylus, or any other suitable object or attachment). The touch panel 671 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 610, receives a command from the processor 610, and executes the command. In addition, the touch panel 671 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 671, the user input unit 67 may also include other input devices 672. In particular, the other input devices 672 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 671 can be overlaid on the display panel 661, and when the touch panel 671 detects a touch operation on or near the touch panel 671, the touch panel 671 can be transmitted to the processor 610 to determine the type of the touch event, and then the processor 610 can provide a corresponding visual output on the display panel 661 according to the type of the touch event. Although the touch panel 671 and the display panel 661 are shown as two separate components in fig. 6 to implement the input and output functions of the terminal, in some embodiments, the touch panel 671 and the display panel 661 can be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 68 is an interface for connecting an external device to the terminal 60. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 68 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the terminal 60 or may be used to transmit data between the terminal 60 and external devices.

The memory 69 may be used to store software programs as well as various data. The memory 69 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 69 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 610 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 69 and calling data stored in the memory 69, thereby performing overall monitoring of the terminal. Processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The terminal 60 may further include a power supply 611 (e.g., a battery) for supplying power to various components, and preferably, the power supply 611 may be logically connected to the processor 610 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.

In addition, the terminal 60 includes some functional modules that are not shown, and will not be described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, including a processor 610, a memory 69, and a computer program stored in the memory 69 and capable of running on the processor 610, where the computer program, when executed by the processor 610, implements each process of the above-mentioned positioning reference signal transmission method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition. A terminal may be a wireless terminal or a wired terminal, and a wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks 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, and Personal Digital Assistants (PDAs). A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Device or User Equipment (User Equipment), which are not limited herein.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned embodiment of the positioning reference signal transmission method, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The above embodiment describes the positioning reference signal transmission method of the present invention from the terminal side, and the following embodiment further describes the positioning reference signal transmission method of the network device side with reference to the accompanying drawings.

As shown in fig. 7, the method for transmitting a positioning reference signal according to the embodiment of the present invention is applied to a network device, and includes the following steps:

step 71: configuring a target transmission bandwidth of the positioning reference signal PRS according to at least one of the activation bandwidth part BWP, the cell transmission bandwidth, and the positioning performance index.

That is, the target transmission bandwidth is associated with at least one of the active bandwidth part BWP, the cell transmission bandwidth and the positioning performance indicator. The positioning performance index may include, but is not limited to, a positioning accuracy index, a positioning delay index, and the like.

Step 72: the PRS is transmitted over a target transmission bandwidth.

After configuring a target transmission bandwidth for the PRS, the network device sends the corresponding PRS to the terminal through the target transmission bandwidth.

In one embodiment, the target transmission bandwidth may be associated with active BWP. Wherein, the step of configuring the target transmission bandwidth of the positioning reference signal PRS according to the active bandwidth part BWP in step 71 includes:

configuring the smaller one of the bandwidth for activating the BWP and the preset bandwidth as a target transmission bandwidth of the PRS; assume that the bandwidth for activating BWP is N PRBs, the target transmission bandwidth configured for PRS by the network device is B PRBs, and the preset bandwidth is X PRBs. Then B may take the smaller of N and some value X. I.e., B ═ min { N, X }.

Or, configuring the bandwidth for activating BWP as a target transmission bandwidth of PRS; assume that the bandwidth for activating BWP is N PRBs, the target transmission bandwidth configured for PRS by the network device is B PRBs, and the value of B is the same as the bandwidth N for activating BWP, i.e. B equals to N.

It is worth pointing out that the bandwidth of the active BWP is greater than or equal to a preset bandwidth threshold, where the preset bandwidth threshold is predefined, configured by a network device, or determined by a terminal. That is, when the network device configures PRS for positioning, the bandwidth configured for BWP activation by the network device has a minimum value, and positioning cannot be performed or positioning accuracy cannot be guaranteed because the bandwidth for BWP activation is too small.

Or, configuring a preset bandwidth as a target transmission bandwidth of the PRS; assume that a target transmission bandwidth configured for the PRS by the network device is B PRBs, and a preset bandwidth is X PRBs. Then B may take the value of the preset bandwidth X. I.e., B ═ X.

It is worth pointing out that the preset bandwidth is predefined or configured for the network device. When the preset bandwidth is configured for the network device, the preset bandwidth is configured for the network device by at least one of the following modes: radio resource control signaling configuration, Media Access Control (MAC) layer signaling configuration and Downlink Control Information (DCI) signaling indication. That is, the network device may perform the indication individually in any one of the above manners, or may perform the indication jointly in at least two of the above manners.

Wherein the target transmission bandwidth may be associated with a positioning performance indicator, and the step of configuring the target transmission bandwidth of the positioning reference signal PRS according to the positioning performance indicator in step 71 includes: and selecting one target transmission bandwidth configured as PRS from at least two candidate transmission bandwidths according to the positioning performance index.

For example, the network device may configure a plurality of PRS candidate transmission bandwidths to form a set of candidate transmission bandwidths, and select a target transmission bandwidth from the set as a PRS according to the configured positioning performance metric. For example, different candidate transmission bandwidths in the candidate transmission bandwidth set are arranged from small to large or from large to small, i.e., the target transmission bandwidth B e { a, B, c, d, e, … }. The network device selects a bandwidth from these values as the value of B according to the required positioning performance index.

Wherein, when the positioning performance index comprises a positioning accuracy index, the target transmission bandwidth is positively correlated with the positioning accuracy index. The term "positive correlation" as used herein means: when the required positioning accuracy index is higher, configuring a relatively larger target transmission bandwidth for the PRS; when the required positioning accuracy is not high, a relatively small target transmission bandwidth is configured for the PRS, so that the overhead is saved.

And when the positioning performance index comprises a positioning delay index, the target transmission bandwidth is inversely related to the positioning delay index. The term negative correlation here means: when the required positioning time delay is small, configuring a relatively small target transmission bandwidth for the PRS; when the required positioning delay can be larger, a relatively larger target transmission bandwidth can be configured for the PRS to improve the positioning accuracy.

In the positioning reference signal transmission method of the embodiment of the invention, the network equipment configures the target transmission bandwidth for the PRS according to at least one of the activated bandwidth part BWP, the cell transmission bandwidth and the positioning performance index, so that the terminal can be ensured to accurately measure the PRS, the position of the terminal can be accurately estimated, and the information transmission performance can be improved.

The foregoing embodiments respectively describe in detail the positioning reference signal transmission methods in different scenarios, and the following embodiments further describe the network devices corresponding to the foregoing embodiments with reference to the accompanying drawings.

As shown in fig. 8, a network device 800 according to an embodiment of the present invention can implement the embodiment to configure a target transmission bandwidth of a positioning reference signal PRS according to at least one of an active bandwidth part BWP, a cell transmission bandwidth, and a positioning performance index; the details of the PRS method are sent on the target transmission bandwidth, and the same effect is achieved, the network device 800 specifically includes the following functional modules:

a configuring module 810, configured to configure a target transmission bandwidth of a positioning reference signal PRS according to at least one of an active bandwidth part BWP, a cell transmission bandwidth, and a positioning performance indicator;

a sending module 820 configured to send the PRS on the target transmission bandwidth.

Wherein the configuration module 810 comprises:

a first configuration sub-module, configured to configure a smaller one of a bandwidth for activating BWP and a preset bandwidth as a target transmission bandwidth of PRS;

alternatively, the first and second electrodes may be,

a second configuration sub-module, configured to configure a bandwidth for activating BWP as a target transmission bandwidth of PRS;

alternatively, the first and second electrodes may be,

and the third configuration submodule is used for configuring the preset bandwidth as the target transmission bandwidth of the PRS.

radio Resource Control (RRC) signaling configuration;

media Access Control (MAC) layer signaling configuration;

and Downlink Control Information (DCI) signaling indication.

Wherein, the configuration module 810 further comprises:

and the fourth configuration submodule is used for selecting a target transmission bandwidth configured as the PRS from the at least two candidate transmission bandwidths according to the positioning performance index.

It should be noted that the division of the modules of the network device and the terminal is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the determining module is called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can invoke the program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

It is worth pointing out that, the network device in the embodiment of the present invention configures a target transmission bandwidth for the PRS according to at least one of the activated bandwidth portion BWP, the cell transmission bandwidth, and the positioning performance index, which can ensure that the terminal accurately measures the PRS to accurately estimate the location of the terminal and improve the information transmission performance.

In order to better achieve the above object, an embodiment of the present invention further provides a network device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and the processor implements the steps in the positioning reference signal transmission method as described above when executing the computer program. Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the positioning reference signal transmission method as described above.

Specifically, the embodiment of the invention also provides a network device. As shown in fig. 9, the network device 900 includes: antenna 91, radio frequency device 92, baseband device 93. The antenna 91 is connected to a radio frequency device 92. In the uplink direction, the rf device 92 receives information via the antenna 91 and sends the received information to the baseband device 93 for processing. In the downlink direction, the baseband device 93 processes information to be transmitted and transmits the information to the rf device 92, and the rf device 92 processes the received information and transmits the processed information through the antenna 91.

The above-mentioned frequency band processing means may be located in the baseband means 93, and the method performed by the network device in the above embodiment may be implemented in the baseband means 93, where the baseband means 93 includes a processor 94 and a memory 95.

The baseband device 93 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 9, wherein one of the chips, for example, the processor 94, is connected to the memory 95 to call up the program in the memory 95 to perform the network device operation shown in the above method embodiment.

The baseband device 93 may also include a network interface 96, such as a Common Public Radio Interface (CPRI), for exchanging information with the rf device 92.

The processor may be a single processor or a combination of multiple processing elements, for example, the processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement the methods performed by the network devices, for example: one or more microprocessors DSP, or one or more field programmable gate arrays FPGA, or the like. The storage element may be a memory or a combination of a plurality of storage elements.

The memory 95 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 95 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Specifically, the network device of the embodiment of the present invention further includes: a computer program stored on the memory 95 and executable on the processor 94, the processor 99 calling the computer program in the memory 95 to execute the method performed by the modules shown in fig. 8.

In particular, the computer program when invoked by the processor 94 is operable to perform: configuring a target transmission bandwidth of a Positioning Reference Signal (PRS) according to at least one of an active bandwidth part (BWP), a cell transmission bandwidth and a positioning performance index; the PRS is transmitted over a target transmission bandwidth.

In particular, the computer program when invoked by the processor 94 is operable to perform: configuring the smaller one of the bandwidth for activating the BWP and the preset bandwidth as a target transmission bandwidth of the PRS;

or, configuring the bandwidth for activating BWP as a target transmission bandwidth of PRS;

or, configuring the preset bandwidth as a target transmission bandwidth of the PRS.

radio Resource Control (RRC) signaling configuration;

media Access Control (MAC) layer signaling configuration;

and Downlink Control Information (DCI) signaling indication.

In particular, the computer program when invoked by the processor 94 is operable to perform: and selecting one target transmission bandwidth configured as PRS from at least two candidate transmission bandwidths according to the positioning performance index.

The network equipment in the embodiment of the invention configures the target transmission bandwidth for the PRS according to at least one of the activated bandwidth part BWP, the cell transmission bandwidth and the positioning performance index, so that the terminal can be ensured to accurately measure the PRS, the position of the terminal can be accurately estimated, and the information transmission performance is improved.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method for transmitting a positioning reference signal is applied to a terminal side, and is characterized by comprising the following steps:

receiving the PRS over at least a portion of the target transmission bandwidth;

receiving the PRS over at least a portion of the target transmission bandwidth comprises:

receiving the PRS over an overlapping portion of the target transmission bandwidth and a measurement GAP.

2. The method according to claim 1, wherein the target transmission bandwidth is:

a smaller one of the bandwidth of the active BWP and a preset bandwidth;

alternatively, the bandwidth of the active BWP;

or, the preset bandwidth.

3. The method according to claim 2, wherein the predetermined bandwidth is predefined or configured by a network device.

4. The method according to claim 3, wherein the predetermined bandwidth is configured for the network device by at least one of:

radio Resource Control (RRC) signaling configuration;

media Access Control (MAC) layer signaling configuration;

and Downlink Control Information (DCI) signaling indication.

5. The method according to claim 1, wherein the bandwidth of the active BWP is greater than or equal to a preset bandwidth threshold, wherein the preset bandwidth threshold is predefined, configured by a network device, or determined by the terminal.

6. The method according to claim 1, wherein the positioning performance indicator comprises a positioning accuracy indicator, and the target transmission bandwidth is positively correlated with the positioning accuracy indicator.

7. The method according to claim 1, wherein the positioning performance indicator comprises a positioning delay indicator, and the target transmission bandwidth is inversely related to the positioning delay indicator.

8. The positioning reference signal transmission method of claim 1, wherein the step of receiving the PRS over at least a portion of the transmission bandwidth of the target transmission bandwidth further comprises one of:

receiving the PRS on an overlapping portion of the target transmission bandwidth with the active BWP, if the PRS is based on a cell configuration;

receiving the PRS on the target transmission bandwidth corresponding to the active BWP if the PRS is based on a BWP configuration;

receiving the PRS on an overlapping portion of the target transmission bandwidth with an inactive BWP.

9. The positioning reference signal transmission method according to claim 8, wherein the measuring the bandwidth of the GAP comprises: at least one of at least a partial bandwidth of the active BWP and at least a partial bandwidth of the inactive BWP.

10. A terminal, comprising:

a receiving module to receive the PRS over at least a portion of the target transmission bandwidth;

the receiving module is specifically configured to:

11. A terminal, characterized in that the terminal comprises a processor, a memory and a computer program stored on the memory and running on the processor, which computer program, when executed by the processor, carries out the steps of the positioning reference signal transmission method according to any one of claims 1 to 9.

12. A method for transmitting a positioning reference signal is applied to a network device side, and is characterized by comprising the following steps:

transmitting the PRS over the target transmission bandwidth;

wherein the terminal receives the PRS on an overlapping portion of the target transmission bandwidth and a measurement GAP (GAP).

13. The positioning reference signal transmission method according to claim 12, wherein the step of configuring the target transmission bandwidth of the positioning reference signal PRS according to the active bandwidth part BWP comprises:

configuring a smaller one of the bandwidth of the active BWP and a preset bandwidth as a target transmission bandwidth of the PRS;

alternatively, the first and second electrodes may be,

configuring a bandwidth of the active BWP as a target transmission bandwidth of the PRS;

alternatively, the first and second electrodes may be,

and configuring the preset bandwidth as a target transmission bandwidth of the PRS.

14. The method according to claim 13, wherein the predetermined bandwidth is predefined or configured by a network device.

15. The method according to claim 14, wherein the predetermined bandwidth is configured for the network device by at least one of:

radio Resource Control (RRC) signaling configuration;

media Access Control (MAC) layer signaling configuration;

and Downlink Control Information (DCI) signaling indication.

16. The method according to claim 12, wherein the step of configuring the target transmission bandwidth of the PRS according to the positioning performance indicator comprises:

selecting a target transmission bandwidth configured as the PRS from at least two candidate transmission bandwidths according to a positioning performance index.

17. The method according to claim 12 or 16, wherein the positioning performance indicator comprises a positioning accuracy indicator, and the target transmission bandwidth is positively correlated with the positioning accuracy indicator.

18. The positioning reference signal transmission method according to claim 12 or 16, wherein the positioning performance indicator comprises a positioning delay indicator, and the target transmission bandwidth is inversely related to the positioning delay indicator.

19. A network device, comprising:

a sending module, configured to send the PRS over the target transmission bandwidth;

20. A network device comprising a processor, a memory, and a computer program stored on the memory and running on the processor, the processor when executing the computer program implementing the steps of the positioning reference signal transmission method according to any of claims 12 to 18.

21. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the positioning reference signal transmission method according to one of claims 1 to 9 or the steps of the positioning reference signal transmission method according to one of claims 12 to 18.