CN116887180A

CN116887180A - Terminal positioning method, device, communication equipment and storage medium

Info

Publication number: CN116887180A
Application number: CN202311016556.5A
Authority: CN
Inventors: 唐懿夫; 孟贤琴; 金子舒; 干娜; 周楠清
Original assignee: Chengdu Airui Wireless Technology Co ltd
Current assignee: Chengdu Airui Wireless Technology Co ltd
Priority date: 2023-08-11
Filing date: 2023-08-11
Publication date: 2023-10-13

Abstract

The application provides a terminal positioning method, a device, a communication device and a storage medium, which relate to a terminal side and a network side, wherein the network side comprises a base station and a position management network element, and the method comprises the following steps: after receiving a positioning service request of a user, a position management network element configures PRS parameters for the user and sends the PRS parameters to the user and a base station; the base station configures PRS resources suitable for transmitting PRS signals for the user according to the received PRS parameters, and judges whether PRS signals are lost or not; if the base station determines that the PRS signal is lost, a PRS retransmission instruction is sent to a user, and the user is informed of PRS resources required to be used by the base station for retransmitting the PRS signal; the base station retransmits the lost PRS signal to the user and schedules uplink resources for the user for transmitting PRS measurements. The application is beneficial to improving the positioning accuracy and reliability of the terminal equipment.

Description

Terminal positioning method, device, communication equipment and storage medium

Technical Field

The present application relates to the field of positioning technologies, and in particular, to a terminal positioning method, a device, a communication device, and a storage medium.

Background

In the case of receiving PRS (Positioning Reference Signal ) in a PPW (PRS Processing Window, positioning reference signal processing window) interval, there may be a problem caused by uplink data transmission and handover intervals. First, for a Redcap user of a half-duplex frequency division, PRS reception and uplink data transmission cannot be performed simultaneously, and only signal transmission and reception with a maximum bandwidth of 20M can be supported. Thus, the user will receive PRS signals in different multiple 20M bandwidths and feed back the measurements, and the base station will combine the multiple measurements to get one full band measurement. However, when the user stops receiving one or more PRSs and only sends uplink data, the base station may miss a portion of PRS measurements when combining multiple PRS measurements in the frequency domain, which ultimately affects positioning accuracy.

Second, there is a handover interval in the adjacent PRS measurement interval. If the user needs to transmit or receive data in the switching interval, the user cannot switch to the next PRS measurement interval in time, which results in that the user cannot successfully receive PRS of the next PRS measurement interval, and the positioning accuracy is also reduced.

Disclosure of Invention

Aiming at the problems caused by the uplink data transmission and switching interval of the half-duplex frequency division user in the PPW interval in the related art, the problems can influence the data transmission and receiving operation in the positioning process, thereby influencing the positioning precision, so the embodiment of the application provides a terminal positioning method, a terminal positioning device, communication equipment and a storage medium.

In a first aspect, an embodiment of the present application provides a terminal positioning method, based on a network side, where the network side includes a base station and a location management network element, the method includes:

after receiving a positioning service request of a user, a position management network element configures PRS parameters for the user and sends the PRS parameters to the user and a base station;

the base station configures PRS resources suitable for transmitting PRS signals for the user according to the received PRS parameters, and judges whether PRS signals are lost or not;

if the base station determines that the PRS signal is lost, a PRS retransmission instruction is sent to a user, and the user is informed of PRS resources required to be used by the base station for retransmitting the PRS signal;

the base station retransmits the lost PRS signal to the user and schedules uplink resources for the user for transmitting PRS measurements.

In some embodiments of the application, the PRS parameters include any one or a combination of the following:

A time length including a time length of each PRS measurement interval and a time length of each handover interval;

PRS resources, at least one PRS resource identifier is configured for each measurement interval, and each PRS resource identifier corresponds to at least one group of PRS resources;

PRS frequency hopping information, which includes the number of frequency hopping or the number of PRS measurement intervals, and overlapping resource blocks of PRS resources corresponding in time domain to two adjacent PRS measurement intervals or PRS resources within each PRS measurement interval explicitly indicated.

In some embodiments of the application, the step of determining whether a PRS signal is lost includes any of:

the base station judges whether PRS signals of a PRS measurement interval are lost or not;

the base station receives a scheduling request initiated by a user so as to judge whether PRS signals of a PRS measurement interval are lost after the user acquires uplink resources allocated by the base station;

the base station issues communication resources to the user so that the user can select the communication resources according to service requirements and judge whether PRS signals of PRS measurement intervals are lost or not.

In some embodiments of the present application, before performing the PRS resource step of transmitting a PRS retransmission indication to a user and informing the user that a base station needs to use PRS signals for retransmission of PRS signals, the method further comprises any one of:

The base station judges whether the PRS signal needs to be retransmitted according to PRS resources;

the base station judges whether the PRS signal needs to be retransmitted according to the service type and the service requirement of the user positioning service;

and the base station judges whether the PRS signal needs to be retransmitted according to the service priority.

In some embodiments of the present application, the step of the base station determining whether to retransmit the PRS signal according to PRS resources includes:

if there is no PRS resource for retransmitting PRS signal in one time slot, when PRS signal of any PRS measurement interval is lost, the base station can not continue retransmitting PRS signal in the time slot, so that PRS retransmission indication can not be activated;

if there are PRS resources in a slot for retransmission of PRS signals, when PRS signals for any one of the PRS measurement intervals are lost, the base station can continue to retransmit PRS signals in the slot such that the PRS retransmission indication will be activated.

In some embodiments of the present application, the step of the base station determining whether to retransmit the PRS signal according to a service type and a service requirement of a user positioning service includes:

if the service requirement of the user positioning service has high requirement on positioning precision error and the PRS signal is lost and cannot meet the requirement on positioning precision, the base station needs to resend the PRS signal so that the PRS resending instruction is activated;

If the service type of the user positioning service is a periodic positioning service and the periodic positioning does not affect the position estimation of the user even if the PRS signal is lost, the base station does not need to retransmit the PRS signal, so that the PRS retransmission indication is not activated.

In some embodiments of the present application, the step of the base station determining whether to retransmit the PRS signal according to a traffic priority includes:

if the user has bursty high priority service, the base station schedules PRS resources for transmitting PRS signals for uplink transmission by the user, so that the PRS signals are lost:

the base station indicates whether the base station needs to retransmit the PRS signal according to uplink service transmission of a user so as to judge whether the PRS signal needs to be retransmitted;

and the base station indicates whether the base station needs to retransmit the PRS signal according to the non-uplink service transmission of the user so as to judge whether the PRS signal needs to be retransmitted.

In some embodiments of the present application, the step of the base station retransmitting the lost PRS signal to the user and scheduling uplink resources for the user for transmitting PRS measurements includes any one of:

if the PRS signal of one PRS measurement section in the plurality of PRS measurement sections is lost due to the occurrence of the service collision, transmitting the PRS signals of all PRS measurement sections after the PRS measurement section of the lost PRS signal according to the PRS resources preset before, and retransmitting the lost PRS signal after the transmission is finished;

If the PRS signal of one PRS measurement section in the plurality of PRS measurement sections is lost due to the occurrence of the service collision, delaying the PRS measurement section of the lost PRS signal and all the subsequent PRS measurement sections by one PRS measurement section, and retransmitting the PRS signal on the corresponding PRS measurement section respectively;

wherein the frequency band occupied by the retransmitted PRS signal includes the frequency band in which the PRS signal was previously lost.

In a second aspect, the present application further provides a terminal positioning device, based on a network side, where the network side includes a base station and a location management network element, the device includes:

the parameter configuration module is used for configuring PRS parameters for a user according to a received positioning service request of the user, and sending the PRS parameters to the user and a base station;

the resource allocation module is used for allocating PRS resources suitable for sending PRS signals for the user according to the received PRS parameters and judging whether PRS signals are lost or not;

a retransmission indication module, configured to send a PRS retransmission indication to a user and notify the user of PRS resources that need to be used for retransmitting PRS signals by a base station if it is determined that there is a PRS signal loss;

and the information retransmission module is used for retransmitting the lost PRS signal to the user and scheduling uplink resources for the user to be used for transmitting the PRS measurement result.

In a third aspect, the present application further provides a terminal positioning method, based on a terminal side, a network side includes a base station and a location management network element, and the method includes:

transmitting a positioning service request of a user to a position management network element, so that the position management network element configures PRS parameters for the user according to the positioning service request and transmits the PRS parameters to a base station, and the base station configures PRS resources suitable for transmitting PRS signals for the user according to the PRS parameters and judges whether PRS signals are lost or not;

and receiving the PRS parameters sent by the position management network element and a PRS retransmission indication sent by the base station in the case that the PRS signal loss is determined, and a notification of PRS resources required to be used by the base station for retransmitting the PRS signal, and receiving a notification of the lost PRS signal and scheduling uplink resources for sending PRS measurement results to the base station by the base station.

In a fourth aspect, the present application further provides a terminal positioning device, based on a terminal side, a network side includes a base station and a location management network element, where the device includes:

a sending module, configured to send a positioning service request of a user to a location management network element, so that the location management network element configures PRS parameters for the user according to the positioning service request and sends the PRS parameters to a base station, and the base station configures PRS resources suitable for sending PRS signals for the user according to the PRS parameters and determines whether PRS signals are lost;

And the receiving module is used for receiving the PRS parameters sent by the position management network element and a PRS retransmission instruction sent by the base station under the condition that the PRS signal loss is judged to exist and a notification of PRS resources required to be used by the base station for retransmitting the PRS signal, and receiving a notification of the lost PRS signal and scheduling uplink resources, wherein the uplink resources are used for sending PRS measurement results to the base station.

In a fifth aspect, the present application also provides a communication device comprising a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the terminal positioning method according to any of the first aspects.

In a sixth aspect, the present application also provides a processor-readable storage medium storing a computer program for causing the processor to execute the terminal positioning method according to any one of the first aspects.

The terminal positioning method, the device, the communication equipment and the storage medium provided by the embodiment of the application are characterized in that when a position management network element receives a positioning service request of a user, PRS parameters suitable for positioning are configured for the user, and the parameters are sent to the user and a base station; the base station configures PRS resources for transmitting PRS signals for the user according to the received PRS parameters, and judges whether PRS signals are lost or not; if the base station determines that there is a PRS signal loss, it sends a PRS retransmission indication to the user and informs the user of PRS resources used to retransmit the PRS signal; the base station then retransmits the lost PRS signal to the user and schedules the uplink resources so that the user can send PRS measurements.

Therefore, the application solves the technical problem of PRS signal loss in the positioning process by configuring and managing PRS parameters by the base station and realizing the retransmission of PRS signals and the transmission of PRS measurement results at the terminal side, is beneficial to improving the positioning accuracy and reliability of terminal equipment and ensures the quality and availability of positioning service. Meanwhile, the application realizes the controllability of data transmission and signal retransmission in the positioning process by using the cooperation between the position management network element and the base station, and further improves the positioning performance.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a network architecture of a location service in an NR system;

FIG. 2 is a flow chart of target user location in an NR system;

FIG. 3a is one of the schematics of resource mapping for PRSs;

FIG. 3b is a second diagram of resource mapping of PRS;

fig. 4 is a schematic diagram of terminal frequency hopping;

FIG. 5 is a schematic diagram of a PRS signal missing in PRS measurement interval 4;

fig. 6 is a schematic flow chart of a terminal positioning method provided by the application;

fig. 7 is a flowchart of a terminal positioning method according to a first embodiment of the present application;

FIG. 8 is a diagram of PRS non-hopping within a PRS measurement interval;

FIG. 9 is a schematic diagram of PRS having frequency hopping within a PRS measurement interval;

FIG. 10 is a schematic diagram of a location management network element configured with two PRS resources;

fig. 11 is a schematic diagram of a measurement interval occupying two OFDM symbols;

fig. 12 is a schematic diagram of a measurement interval occupying one OFDM symbol;

fig. 13 is a schematic diagram of a PRS measurement interval 3 in which a traffic collision occurs;

FIG. 14 is a schematic diagram of retransmitting a PRS signal in PRS measurement interval 6;

FIG. 15 is a schematic diagram of delaying one PRS measurement interval;

fig. 16 is a flowchart of a terminal positioning method according to a second embodiment of the present application;

fig. 17 is a flowchart of a terminal positioning method according to a third embodiment of the present application;

fig. 18 is a schematic structural diagram of a terminal positioning device according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In the embodiment of the application, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The term "plurality" in embodiments of the present application means two or more, and other adjectives are similar.

The embodiment of the application provides a terminal positioning method, a device, communication equipment and a storage medium, which solve the problem of PRS signal loss in the positioning process by configuring and managing PRS parameters through a base station and realizing the retransmission of PRS signals and the transmission of PRS measurement results at a terminal side. Meanwhile, the application realizes the controllability of data transmission and signal retransmission in the positioning process by using the cooperation between the position management network element and the base station, and further improves the positioning performance.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, and it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

3GPP(3 ^rd Generation Partnership Project, third generation partnership project) standardization organization defines wireless communication service types in different application fields for meeting different application scenarios and requirements. Among them, high-precision positioning is used as a key application in the wireless communication technology, and corresponding standardization work is also obtained in the development process from LTE (Location Management Function, long term evolution) to NR (New Radio, new wireless communication system).

In cellular mobile communications, conventional positioning techniques are based mainly on estimating the distance or angle between a known base station and a target user having positioning requirements. This method is often used to estimate distance or angle by measuring the time difference of arrival (Time Difference of Arrival, TDOA), signal strength difference (Received Signal Strength Indicator, RSSI) or based on radio frequency fingerprints.

The purpose of the 3GPP standardization effort is to develop a unified set of technical specifications to ensure consistency in supporting high precision positioning in different mobile communication networks and to provide a more accurate and reliable positioning solution. The requirements of application fields such as emergency calls, location service providers, intelligent transportation and the like on high-precision positioning can be met, so that the application and development of wireless communication technology are promoted.

Referring to fig. 1, fig. 1 shows a network architecture of a location service in a NR system at present. The network architecture comprises user equipment UE at the terminal side and base stations at the network side (e.g. next generation evolved base stations Ng-eNB and 5G new radio base stations gNB), location management network elements (Location Management Function, LMF) and access and mobility management network elements (Access and Mobile Management Function, AMF).

In the architecture, the AMF is responsible for receiving a positioning request initiated by a certain target user, or a positioning request initiated by itself, or a positioning request initiated by another network entity. The AMF may send a location services request to the location management network element. The LMF is configured to process the location request, obtain a location estimate of the target user via a location technique between the target user and the base station, and report the estimate to the AMF. NLs in the figure represents communication and protocol interactions between the AMF and LMF at the non-access stratum.

It should be noted that, in the positioning service of the NR system, the UE may be connected to the base station through a 4G air interface (LTE-Uu) or may be connected to the base station through a 5G air interface (NR-Uu). This means that the UE can support a location service regardless of whether it uses the 4G or 5G technology, and perform related processing and communication through the AMF and LMF. Based on the network architecture shown in fig. 2, the NR system can provide reliable and accurate positioning services to meet the requirements for high-precision positioning in various application scenarios.

Referring to fig. 2, fig. 2 shows a flow of locating a target user in an NR system.

The method comprises the following steps:

and step 1, initiating a positioning service request.

Illustratively, initiating a location services request includes two cases:

in the first case, step 1a, the location management network element LMF receives a location service request initiated by a target user. That is, the target user makes a request that he wishes to acquire his own location information.

In the second case, step 1b, the access and mobility management network element AMF itself decides on the target user who needs to initiate a location service request. That is, the AMF decides that the location information of a certain target user needs to be acquired according to its own logic and requirements.

Both of the above cases may initiate a location service request to obtain location information of the target user.

Step 2, the amf sends the location service request to the LMF.

Step 3, in the processing process of the positioning service, the LMF performs different operations according to different conditions, as follows:

the first operation, step 3a, is that the lmf performs positioning related procedures with the access network side of the base station, such as informing the access network about a positioning service request, receiving positioning signal measurements from the access network, etc.

The second operation, step 3b, may also be that if the downlink PRS is used for positioning, the LMF performs positioning related procedures with the target terminal side, such as notifying the target user about the positioning service request, receiving PRS measurement results sent by the target user, etc.

Both the above step 3a and step 3b are for collecting data required for positioning, wherein step 3a is communication with the base station access network side, and step 3b is communication with the target user (when the target user uses the downlink PRS).

And 4, in the processing process of the positioning service, the LMF carries out position estimation according to the measurement result and sends the position estimation result to an entity initiating the positioning service request through the AMF.

By way of example, specific operations may include the following two cases:

the first case, step 5a, is that if it is a location service request initiated by an entity other than the AMF, the AMF will send the result of the location estimate to that entity as a response to meet its requirement for the location information of the target user.

In the second case, step 5b, if the AMF itself decides to initiate a location service request, the AMF uses the location estimation result already acquired by itself when determining that the target user needs to be located, without replying to the request of other entity.

It should be noted that, the location service entity refers to an entity or a system that provides a location service for a target user. The location services entity is responsible for receiving and processing location services requests, coordinating and managing all resources and information involved in the location process. The method can communicate with a base station access network side and a target terminal side to acquire measurement data required by positioning, perform position estimation and positioning calculation, and finally generate a positioning estimation result.

The target user refers to a specific user device, such as a mobile phone, a smart phone, etc., that needs to be located. The target user is the object of the location service and its location information is the subject that needs to be determined and estimated. The target user may trigger the operation of the location service entity by sending a location request or a location service request initiated by another entity. The target user may upload its positioning reference signal measurements to the location service entity for position estimation and positioning resolution.

Illustratively, when providing location services in a 5G communication system, there are generally two ways in which location resolution may be performed:

the first way is: when the target user measures the downlink PRS for positioning, the PRS measurement result can be reported to the LMF, and the LMF performs positioning calculation and obtains a positioning estimation result (namely the position estimation value of the target user). This approach is called LMF-based location resolution.

The second way is: when the target user transmits an uplink SRS-pos signal to perform positioning, a 5G new wireless base station (gNB) performs measurement, and transmits a measurement result to the LMF, and the LMF performs positioning calculation and obtains a positioning estimation result. This approach is also known as LMF-based position location resolution.

The two above approaches describe two main positioning solutions taken when providing positioning services in a 5G communication system: positioning solutions based on location management network elements and positioning solutions based on the target user itself. The positioning reference signals used therein may be downlink positioning reference signals PRS or uplink SRS-pos signals.

In the method of positioning by using PRS, the resource mapping manner of PRS is shown in fig. 3a and 3 b. Configuration information of the PRS is transmitted by the location management network element to the UE through LPP (LTE Positioning Protocol ). The configuration information of the PRS includes a set of a plurality of PRS resources, referred to as a PRS resource set (PRS-resource set). The configuration of each PRS resource includes an identification of the PRS resource, a PRS transmission period, time-frequency resources and frequency hopping information within each PRS transmission period, and so on.

For the first PRS configuration, as shown in fig. 3a, one OFDM symbol is used in the time domain and the comb-1 structure is used in the frequency domain, i.e., PRS is mapped to each Resource Element (RE) of each Resource Block (RB) in the frequency band. For the second PRS configuration, as shown in fig. 3b, four OFDM symbols are used in the time domain, a comb-4 structure is used in the frequency domain for each OFDM symbol, and there is frequency hopping between symbols, with a frequency hopping offset of one resource element.

That is, when positioning is performed using PRS, the configuration of PRS includes the two different resource mapping manners and parameter settings described above, where time domain configuration, frequency domain configuration, and frequency hopping related information are involved. Such configuration information may be communicated from the location management network element to the UE for use in the positioning procedure via the LPP protocol.

Illustratively, when positioning is performed using the downlink positioning reference signals PRS, i.e. the first positioning solution described above, the protocol defines two time windows for measuring the positioning signals. The two time windows include a Measurement Gap (MG) and a positioning reference signal processing window (PRS Processing Window, PPW).

Measurement Gap (MG): the user equipment only needs to receive PRS signals for the duration of the MG without any other data reception or transmission.

Positioning reference signal processing window (PPW): PPW is an active bandwidth part (BWP) that includes specific time and frequency domain resource blocks, and the ue may receive or transmit other data while receiving PRS signals, such as signals on downlink channels PDCCH (Physical Downlink Control Channel ) and PDSCH (Physical Downlink Shared Channel, physical downlink shared channel), or signals on uplink channels PUCCH (Physical Uplink Control Channel,) physical uplink control channel and PUSCH (Physical Uplink Shared Channel ). The PDCCH is used for transmitting control information, the PDSCH is used for transmitting downlink data, the PUCCH is used for transmitting control information, and the PUSCH is used for transmitting uplink data.

When the user receives the PRS signal in the PPW, the user equipment may simultaneously receive other downlink signals. According to the protocol specification, it is necessary to discard data transmissions with lower priority by priority determination. Or when the user transmits other uplink data, if it is HD (Half Duplex) in the FDD (Frequency Division Duplexing, frequency division Duplex) system, the user cannot receive and transmit at the same time, and the protocol specifies that in this case the user will only transmit uplink data and no longer receive PRS signals.

That is, when PRS positioning is used, the protocol specifies the use of two time windows, namely a measurement gap and a positioning reference signal processing window, to allow PRS signal reception and other data transmission to be performed simultaneously, or priority determination to discard low priority data, or only uplink data transmission to be performed without receiving PRS signals, to ensure positioning effect and communication quality according to circumstances.

In the standardization work of 3gpp r17 in positioning, first, the positioning procedure and related processing of the general user are standardized. Subsequently, the positioning method of the RedCap UE with limited capability (Reduced Capability) is discussed and standardized.

By definition of NR, a RedCap UE refers to a user equipment with limited capabilities. The following table is the capability difference of R15 (the first release specification version of 3GPP for 5G NR) normal users and RedCap users under FR1 (Frequency Range 1). From this table, it can be seen that the following capabilities of the RedCap UE are limited compared to the user of R15: maximum bandwidth supported, number of antennas, MIMO (Multiple-Input Multiple-Output) streams, modulation scheme, and duplex mode.

When positioning is performed by downlink signals for users with unlimited capabilities, PRS signals need to be transmitted using a full bandwidth of 100MHz in order to improve positioning accuracy. Thus, the user needs to receive PRS signals over a 100MHz bandwidth to make measurements. For a location solution mode based on a location management network element (LMF-based), a user needs to send a measurement result to a network side, and the location management network element carries out location estimation; whereas for a user based positioning solution (UE-based), the user will use the measurement results for position estimation.

However, for a capability-limited RedCap UE, the user can only receive a 20MHz bandwidth signal at a time based on the information in the table, which limits positioning accuracy. Thus, in accordance with the current 3GPP discussion, as shown in fig. 4, a RedCap enabled UE uses a frequency hopping (Frequency Hopping) approach when receiving PRS signals. Within each PRS measurement interval, after a user receives a PRS signal, it switches to the next PRS measurement interval and the received PRS signal hops over the frequency domain, but the length of the PRS measurement interval remains unchanged. In order to eliminate the Doppler frequency offset caused by frequency hopping, a part of resources overlap in time of two adjacent PRS reception. Finally, the multiple measurement results are spliced into a full bandwidth 100MHz received signal. Between two adjacent PRS measurement intervals, there is one switching interval so that the user can switch to the next frequency band for PRS measurement. Thus, by measuring the frequency hopped PRS signal multiple times, it is eventually possible to combine into a PRS signal corresponding to the 100MHz full bandwidth that one RedCap UE is configured to also receive.

That is, for the capability-limited RedCap UE, the PRS signals measured multiple times are used in a frequency hopping manner in the positioning scenario and may be finally combined into a full bandwidth signal, so that the RedCap UE may also receive and process the PRS signal of 100MHz, which is helpful for improving positioning accuracy of the RedCap UE.

For the capability-limited RedCap UE, a frequency hopping manner is adopted to measure between PRS measurement intervals, and PRS signals on different frequency bands of multiple measurement intervals are combined into one full bandwidth signal. However, in this process, there may be a case where no measurement is performed in a certain measurement section. As shown in fig. 5, if the user needs to transmit uplink data within the PRS measurement interval 4, the PRS signal is not continuously received. The corresponding measurement result of the PRS measurement interval 4 is deleted during frequency domain combining, and finally the positioning accuracy is reduced.

The application can provide a terminal positioning method aiming at the RedCAP UE with limited capability, and a plurality of PRS signals are received between PRS measurement intervals through frequency hopping and combined into a full bandwidth signal for positioning. When the PRS signal in part of the measurement interval fails to be received, the base station is adopted to retransmit the PRS signal in the measurement interval with the failed reception, so as to ensure that the full bandwidth signal can still be finally combined, and avoid the reduction of positioning accuracy.

Referring to fig. 6, fig. 6 is a flowchart of a terminal positioning method provided by the present application. The terminal positioning method comprises the following steps:

in step 610, after receiving a positioning service request of a user, the location management network element configures PRS parameters for the user, and sends the PRS parameters to the user and a base station.

In step 620, the base station configures PRS resources suitable for transmitting PRS signals for the user according to the received PRS parameters and determines whether any PRS signals are lost.

If the base station determines that the PRS signal is lost, then a PRS retransmission indication is sent to the user and the user is notified that PRS resources are needed for the base station to retransmit the PRS signal.

In step 640, the base station retransmits the lost PRS signal to the user and schedules uplink resources for the user for transmitting PRS measurements.

The terminal positioning method is used for solving the problem of PRS signal loss in the terminal positioning process, and the lost PRS signal is retransmitted by the base station through positioning service request, configuration and management of PRS parameters, so that more reliable positioning service is provided, the influence of PRS signal loss can be reduced, and accurate terminal positioning is ensured.

The following is a description of specific embodiments.

Embodiment one:

referring to fig. 7, fig. 7 is a flowchart of a terminal positioning method according to a first embodiment of the present application. The terminal positioning method comprises the following steps:

step 710, after receiving the positioning service request of the user, the location management network element configures PRS parameters for the user, and sends the PRS parameters to the user and the base station.

Illustratively, the PRS parameters described above include, but are not limited to, any one or a combination of the following:

(1) Length of time.

The time length includes a time length of each PRS measurement interval and a time length of each handover interval.

In PRS resources sent by a location management network element to a user, a time length of a PRS measurement interval and a time length of a handover interval, e.g. a number of persistent OFDM symbols, need to be indicated. From the PRS parameters, a time length of each PRS measurement interval, i.e., a transmission time length of a PRS signal within each PRS measurement interval, may be determined.

(2) PRS resources.

One or more PRS resource identities (PRS-resource ids) are indicated when PRS resources are configured, and each resource identity corresponds to a configuration of a set of PRS resources.

Specifically, as shown in FIG. 3a, a first set of PRS resources (PRS-resource id-1) is configured to the target user, using 1 OFDM symbol in the time domain, and a comb-1 structure in the frequency domain.

Specifically, as shown in FIG. 3b, a second set of PRS resources (PRS-resource id-2) is configured to the target user, 4 OFDM symbols (OFDM symbols 4-7) are used in the time domain, the comb-4 structure is used in the frequency domain, and the comb-offset is set to [3,2,1,0] to achieve PRS frequency hopping between symbols.

(3) PRS frequency hopping information.

The PRS frequency hopping information includes a frequency hopping number or a number of PRS measurement intervals, and overlapping resource blocks of PRS resources corresponding in time domain to two adjacent PRS measurement intervals or PRS resources within each PRS measurement interval explicitly indicated, for example, a starting Physical Resource Block (PRB) of PRS resources and a number of used PRBs.

These information of (1) - (3) above are used for frequency hopping configuration to ensure that PRS can perform efficient frequency hopping operations between different regions.

For positioning of the RedCap user, a frequency hopping configuration needs to be performed between PRS measurement intervals, but frequency hopping may not be performed within PRS measurement intervals.

As shown in fig. 8, PRS signals are transmitted using 1 OFDM symbol within each PRS measurement interval, and PRS signals within PRS measurement intervals are not frequency hopped.

As shown in fig. 9, PRS signals are transmitted using 2 OFDM symbols within each PRS measurement interval, and PRS signals within the PRS measurement interval are frequency hopped. That is, the frequency of the PRS signal may vary among different OFDM symbols.

In step 720, the base station configures PRS resources suitable for transmitting PRS signals for the user according to the received PRS parameters.

PRS measurements involve the configuration of some parameters, one of which is the configuration of PRS resources. When the base station receives the PRS parameters from the position management network element, the base station can carry out corresponding resource allocation indication on the user according to the PRS parameters.

Specifically, when the base station obtains one or more PRS resource identifiers in the PRS parameters, one or more corresponding PRS resource identifiers are indicated to the user.

For example, as shown in FIG. 10, the location management network element is configured with two different PRS resources, PRS resource 1 and PRS resource 2, and uses PRS-resource-Id1 and PRS-resource-Id2, respectively, as their identities. When configuring PRS resources for a user, a base station may choose to configure a set of PRS resources (e.g., PRS-resource-Id1 or PRS-resource-Id 2) so that the user may make measurements on the corresponding PRS resources. In addition, the base station may also configure two sets of PRS resources for the user such that the user may make PRS measurements on the two sets of resources.

That is, in PRS measurement, the base station needs to indicate configured PRS resources to corresponding users according to PRS parameters sent by a location management network element. The base station may choose to configure one or more sets of PRS resources so that the user may perform corresponding measurement operations on those resources.

In step 730, the base station determines whether PRS signals of PRS measurement intervals are lost.

For example, for a user of HD-FDD (High-Density Frequency Division Duplex ), the base station may receive a scheduling request sent by the user and schedule resources for the user in a measurement interval of PRS. According to the resources allocated by the scheduling request, the base station can judge whether the PRS signal has business conflict with the uplink transmission. In addition, when the user sends a scheduling request, the PRS signal may be lost, and the base station may make a determination according to the received scheduling request.

That is, the base station allocates PRS resources for the user in a PRS measurement interval according to a scheduling request of the user, and determines whether a PRS signal has a traffic collision with uplink transmission according to the allocated PRS resources.

If the base station determines that the PRS signal is lost, then a PRS retransmission indication is sent to the user and the user is notified of PRS resources that the base station needs to use to retransmit the PRS signal, step 740.

Illustratively, the base station may send a PRS retransmission indication to the user for handling the case of PRS signal loss. When the PRS retransmission indication is activated, the base station retransmits the PRS signal to the user in the event that the PRS signal is lost to ensure that the user is able to properly receive the PRS signal. If the PRS retransmission indication is not active, the base station does not perform a retransmission operation on the PRS.

For example, the base station may determine whether to retransmit the PRS signal according to a configuration of PRS resources and a service type, service requirement, or priority of a user positioning service.

For example, after receiving a scheduling request from a user, the base station evaluates whether the PRS signal needs to be retransmitted according to a positioning service type, a requirement, or a priority of the user. If the user's traffic requirements have high demands on accuracy and reliability, the base station can decide to retransmit the PRS signal to ensure accurate positioning and high reliability service.

Illustratively, the base station determines whether a retransmission operation of the PRS can be performed according to a configuration of PRS resources. In particular two different time slot configurations as shown in fig. 11 and 12.

As shown in fig. 11, one slot contains 5 PRS measurement intervals, each measurement interval occupies two OFDM symbols to transmit PRS, and there is one switching symbol between two adjacent measurement intervals. When the PRS signal of any PRS measurement interval is lost, if PRS resources for retransmitting the PRS signal are not available in one slot, the base station cannot continue to retransmit the PRS signal in the slot. In this case, the PRS retransmission indication is not activated.

As shown in fig. 12, 5 PRS measurement intervals are included in one slot, but each measurement interval occupies one OFDM symbol to transmit PRS, and there is one switching symbol between two adjacent measurement intervals. When the PRS signal of any one PRS measurement interval is lost, if there are PRS resources for retransmitting the PRS signal in one slot (e.g., there are remaining 5 measurement symbols available for retransmission in the slot shown in fig. 12), the base station may continue to retransmit the PRS signal in the remaining 5 OFDM symbols in the slot. In this case, the PRS retransmission indication will be activated.

As further shown in fig. 12, if PRS signals of PRS measurement interval 3, PRS measurement interval 4 and PRS measurement interval 5 are lost and considering that a base station needs to retransmit symbols used by 3 PRSs and handover symbols between adjacent measurement intervals, retransmission of PRS signals can be completed within the remaining 5 OFDM symbols. In this case, the PRS retransmission indication is also activated.

Illustratively, the base station may determine whether it is necessary to retransmit the PRS signal based on a service type and service requirement of the user positioning service or a priority.

In particular, the positioning service may be initiated by the network side or the terminal side. For example, if the positioning traffic of the user is high precision, the precision error requirement for positioning is high, and the PRS signal will not meet the positioning precision requirement because the PRS signal is lost, the PRS signal needs to be retransmitted, i.e., a PRS retransmission indication will be activated.

For another example, if the positioning service of the user is periodic positioning, even if positioning accuracy is degraded due to the PRS signal being lost in one positioning service, the periodic positioning leaves the position estimate of the user unaffected, the PRS signal may not be retransmitted, i.e., the PRS retransmission indication may not be activated.

If the PRS retransmission indication is activated, the base station also needs to inform the user of the PRS resources used to retransmit the PRS signal so that the user can re-receive the PRS signal on the resources.

In step 750, the base station retransmits the lost PRS signal to the user and schedules uplink resources for the user for transmitting PRS measurements.

For example, as shown in fig. 13, the user performs transmission of uplink data in the PRS measurement interval 3, and generates a traffic collision with PRS signals to be transmitted in the PRS measurement interval 3.

As shown in fig. 14, the base station confirms that the user does not receive the PRS signal of the PRS measurement interval 3, but still transmits PRS signals in the PRS measurement interval 4 and the PRS measurement interval 5 according to a previously predetermined PRS resource. After the PRS signal is transmitted in PRS measurement interval 5, the base station retransmits the PRS signal in PRS measurement interval 6.

The base station may transmit PRS signals only in the full bandwidth (band 1-band 5) or in a portion of the full bandwidth (band 3). In either case, it is necessary to ensure that the frequency band of the retransmitted PRS signal contains the frequency band of the lost PRS signal.

That is, the base station may choose to transmit on the full bandwidth (band 1 to band 5) or may transmit the PRS signal only on a portion of the bandwidth (band 3) when transmitting the PRS signal. Regardless of whether the base station chooses to transmit the PRS signal using full bandwidth or partial bandwidth, it is desirable to ensure that the frequency band occupied by the retransmitted PRS signal includes the frequency band within which the previously lost PRS signal was located when retransmitting. For example, if a previous PRS signal is lost on band 3, then at the time of retransmission, whether the base station selected full bandwidth or partial bandwidth to transmit the PRS signal, it is necessary to ensure that the retransmitted PRS signal contains at least band 3. This ensures that the receiving end obtains the PRS signal lost in band 3 to improve the accuracy and reliability of reception.

In another embodiment, as shown in fig. 15, the base station confirms that the PRS of PRS measurement interval 3 is not received by the user, and may delay PRSs of PRS measurement interval 3, PRS measurement interval 4, and PRS measurement interval 5 by one PRS measurement interval, corresponding to retransmitting PRS signals on PRS measurement interval 4, PRS measurement interval 5, and PRS measurement interval 6, respectively.

Embodiment two:

referring to fig. 16, fig. 16 is a flowchart of a terminal positioning method according to a second embodiment of the present application. The terminal positioning method comprises the following steps:

In step 1610, after receiving a positioning service request of a user, the location management network element configures PRS parameters for the user, and sends the PRS parameters to the user and a base station.

(1) Length of time.

(2) PRS resources.

(3) PRS frequency hopping information.

In step 1620, the base station configures PRS resources suitable for transmitting PRS signals for the user according to the received PRS parameters.

In step 1630, the base station receives the scheduling request initiated by the user, so that the user can determine whether the PRS signal of the PRS measurement interval is lost after obtaining the uplink resource allocated by the base station.

Illustratively, the user may send a scheduling request to the base station according to traffic demands. Because users may have bursty high priority traffic, such as URLLC (Ultra-Reliable and Low-Latency Communications), ultra-Reliable Low-latency communications. The base station may schedule PRS resources in time to transmit PRS signals for user uplink transmissions, resulting in PRSs being lost. After receiving the PRS resource indicated by the base station, the user can judge whether collision occurs with PRS signal reception.

That is, the base station uses the previous PRS resources when scheduling uplink transmissions of users, and thus may cause PRS signal loss. After receiving the PRS resource indicated by the base station, the user needs to determine whether the PRS resource collides with the PRS signal.

The user can determine whether to request the base station to retransmit the PRS signal according to the configuration of PRS resources, a service type, a service requirement, or a priority of a positioning service.

For example, when the user is very critical to the reception of the PRS signal in the positioning service or the service requirement of the user has a high requirement on accuracy and reliability, the user may determine whether to request the base station to perform a PRS signal retransmission operation according to the configuration of PRS resources and its own requirements.

For example, whether retransmission of the PRS signal is necessary may be determined according to a service type, service requirement, or priority of a user positioning service.

For example, if the positioning traffic of the user is high precision, the precision error requirement for positioning is high, and the PRS signal will not meet the positioning precision requirement because the PRS signal is lost, the PRS signal needs to be retransmitted, i.e., a PRS retransmission indication will be activated.

In step 1640, if the user determines that there is a PRS signal loss, the base station is instructed to whether or not to retransmit the PRS signal when the user performs uplink transmission.

That is, as the user performs uplink traffic transmission, the user may carry an indication as to whether the base station is required to retransmit the PRS signal. The indication may be transmitted over an uplink shared channel (also referred to as a common data channel) and data-bearing transmission.

For example, when the user needs the base station to retransmit the PRS signal, an indication flag may be added to the uplink data to inform the base station that the PRS signal needs to be retransmitted. The indication mark can be sent through an uplink shared channel or can be transmitted to the base station through a data channel transmission mode.

The uplink shared channel is a channel for a plurality of users to simultaneously transmit uplink data. The user may transmit a data frame containing information about whether the base station is required to retransmit the PRS signal in the uplink shared channel. The data channel transmission refers to the transmission of control information while the data is transmitted. The user can carry a request about whether the base station needs to resend the PRS signal in the data channel transmission at the same time of uplink data transmission.

Therefore, by carrying an indication whether the base station needs to retransmit the PRS signal in uplink transmission, the user can actively send a request to the base station and effectively interact with the base station to meet the self-demand and optimize the quality and reliability of the positioning service.

At step 1650, if the base station receives a request from the user to retransmit the PRS signal, the base station retransmits the lost PRS signal to the user and schedules uplink resources for the user to use to transmit PRS measurements.

Embodiment III:

referring to fig. 17, fig. 17 is a flowchart of a terminal positioning method according to a third embodiment of the present application. The terminal positioning method comprises the following steps:

step 1710, after receiving the positioning service request of the user, the location management network element configures PRS parameters for the user, and sends the PRS parameters to the user and the base station.

(1) Length of time.

(2) PRS resources.

(3) PRS frequency hopping information.

In step 1720, the base station configures PRS resources for the user suitable for transmitting PRS signals according to the received PRS parameters.

In step 1730, the base station issues communication resources to the user so that the user selects communication resources according to the traffic demand and determines whether PRS signals for PRS measurement intervals are lost.

And the user selects communication resources meeting the conditions for uplink transmission according to the service requirements of the user. In uplink transmission, the user determines whether there is a collision with the reception of the PRS signal. If a collision occurs, the user may discard the received PRS signal because the collision may have an impact on the accuracy and reliability of the positioning service.

Through the process, a user can evaluate the conflict situation between the communication resource and the PRS signal receiving according to the service requirement, and decide whether to request the base station to retransmit the PRS signal according to the self requirement, which is helpful to improve the accuracy and reliability of the positioning service.

If the user determines that there is a PRS signal loss, then the base station is instructed if the PRS signal needs to be retransmitted by the base station when the user is transmitting for non-uplink traffic, step 1740.

That is, the user may send an indication to the base station to determine whether the base station is required to retransmit the PRS signal while transmitting data for non-uplink traffic. Meanwhile, the user may carry the indication in sending PRS measurement reports to the base station.

For example, when the user needs the base station to retransmit the PRS signal, an indicator may be added to the data that is not transmitted in the uplink to inform the base station that the PRS signal needs to be retransmitted. This indicator may be sent to the base station by way of a data transmission.

Illustratively, in the scenario of positioning solutions based on a location management network element, the user carries an indication in the PRS measurement report to whether the base station is required to retransmit the PRS signal. If the user needs the base station to retransmit the PRS signal, the base station also needs to be informed of the PRS measurement interval of the lost PRS signal.

That is, in the scenario of position-based location resolution by a location management network element, a user communicates position-related measurements to a base station via PRS measurement reports. In addition to conveying the measurement results, the user may also attach an indicator in the PRS measurement report to inform the base station whether the PRS signal needs to be retransmitted. If the user determines that the PRS signal needs to be retransmitted by the base station, the user also needs to communicate a PRS measurement interval of the lost PRS signal to the base station while indicating that the base station needs to retransmit the PRS signal. This PRS measurement interval of lost PRS signals refers to the frequency band range in which PRS signals were not successfully received during previous measurements.

By reporting the measurement results in a PRS measurement report and indicating whether the PRS signal needs to be retransmitted by the base station and informing the base station of the PRS measurement interval in which the PRS signal was lost, the user can effectively interact and cooperate with the base station. The base station can take corresponding measures according to PRS measurement results and requirements provided by the user, including retransmitting PRS signals and adjusting configuration of PRS resources so as to meet positioning requirements of the user and improve positioning accuracy.

In step 1750, if the base station receives a request from the user to retransmit the PRS signal, the base station retransmits the lost PRS signal to the user and schedules uplink resources for the user to use to transmit PRS measurements.

That is, when a user transmits a request to a base station, and needs to retransmit a PRS signal, the base station needs to prepare PRS resources required to retransmit the PRS signal and notify the user. In the scene of positioning and resolving based on the LMF, the base station also needs to allocate resources reported by PRS result measurement for the user again.

For example, when the base station receives a user request for a PRS signal to be retransmitted, the base station prepares PRS resources for the PRS signal to be retransmitted. PRS resources may include resources in terms of time, frequency, etc. to ensure that PRS signals can be re-transmitted to users. The base station also sends a notification to the user that the user is ready to perform a retransmission of the PRS signal.

In the scene of positioning and resolving based on the LMF, the base station also needs to allocate resources reported by PRS result measurement for the user again. That is, the base station needs to reconfigure resources so that the user can re-make PRS measurements and report PRS measurements to the base station. By reallocating resources reported by PRS result measurement, the base station can acquire new measurement results for positioning calculation and providing accurate positioning service.

In summary, when the base station receives a user request and needs to retransmit a PRS signal, the base station prepares PRS resources and notifies the user, and in an LMF-based scenario, the base station also reallocates resources reported by PRS result measurement to the user, so as to meet the positioning requirement of the user and improve the positioning accuracy.

The terminal positioning device provided by the application is described below, and the terminal positioning device described below and the terminal positioning method described above can be referred to correspondingly.

Referring to fig. 18, fig. 18 is a schematic structural diagram of a terminal positioning device according to an embodiment of the present application. A terminal positioning device 1800, based on a network side comprising base stations and location management network elements, comprises a parameter configuration module 1810, a resource configuration module 1820, a retransmission indication module 1830, and an information retransmission module 1840.

Illustratively, parameter configuration module 1810 is to:

and configuring PRS parameters for the user according to the received positioning service request of the user, and sending the PRS parameters to the user and the base station.

Illustratively, the resource configuration module 1820 is to:

and configuring PRS resources suitable for transmitting PRS signals for the user according to the received PRS parameters, and judging whether the PRS signals are lost or not.

Illustratively, the retransmission indication module 1830 is to:

if it is determined that there is a PRS signal loss, a PRS retransmission indication is sent to the user and the user is notified of PRS resources that need to be used by the base station to retransmit the PRS signal.

Illustratively, the information retransmission module 1840 is configured to:

retransmitting the lost PRS signal to the user and scheduling uplink resources for the user for transmitting PRS measurements.

Illustratively, the PRS parameters include any one or a combination of the following:

Illustratively, the resource configuration module 1820 is further configured to perform any one of:

Illustratively, the retransmission indication module 1830 is further operable to perform any one of:

Illustratively, the retransmission indication module 1830 is further configured to:

Illustratively, the information retransmission module 1840 is further configured to perform any one of:

In some embodiments of the present application, the present application further provides a terminal positioning method, based on a terminal side, the method includes:

In some embodiments of the present application, the present application further provides a terminal positioning device, based on a terminal side, the device includes:

The method and the device are based on the same application, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

Referring to fig. 19, fig. 19 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the communication device includes a memory 1910, a transceiver 1920, and a processor 1930.

Wherein the memory 1910 is used for storing a computer program; the transceiver 1920 is used for receiving and transmitting data under the control of the processor; the processor 1930 is used to read the computer programs in the memory and execute the terminal positioning method as described above.

Wherein in fig. 19, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 1930 and various circuits of memory, represented by memory 1910, linked together. The bus architecture may also link together various other circuits such as peripheral voltage regulators, power management circuits, etc., as are well known in the art, and thus, will not be further described herein. The bus interface provides an interface. The transceiver 1920 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The processor 1930 is responsible for managing the bus architecture and general processing, and the memory 1910 may store data used by the processor 1930 in performing operations.

Processor 1930 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field-programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), and may also employ a multi-core architecture.

It should be noted that, the above communication device provided by the embodiment of the present application can implement all the method steps implemented by the embodiment of the method and achieve the same technical effects, and the same parts and beneficial effects as those of the embodiment of the method in the embodiment are not described in detail herein.

On the other hand, the embodiment of the present application further provides a processor readable storage medium, where a computer program stored thereon enables a processor to implement all the method steps implemented by the above method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor including, but not limited to, magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical memory (e.g., cd.dvd.bd.hvd, etc.), and semiconductor memory (e.g., rom.eprom.eeprom, nonvolatile memory (NAND FLASH), solid State Disk (SSD)), etc.

It will be apparent to those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts and/or block diagrams, can be implemented by computer-executable instructions. The instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A terminal positioning method, characterized in that, based on a network side, the network side includes a base station and a location management network element, the method includes:

2. The terminal positioning method according to claim 1, wherein the PRS parameters include any one or a combination of the following:

3. The terminal positioning method according to claim 1, wherein the step of determining whether the PRS signal is lost includes any one of:

4. The terminal positioning method according to claim 1, wherein before performing the PRS resource step of transmitting a PRS retransmission indication to a user and informing the user that a PRS signal needs to be used by a base station to retransmit the PRS signal, the method further comprises any one of:

5. The terminal positioning method according to claim 4, wherein the step of the base station determining whether the PRS signal needs to be retransmitted based on PRS resources comprises:

6. The terminal positioning method as claimed in claim 4, wherein the step of the base station judging whether the PRS signal needs to be retransmitted according to a service type and a service requirement of the user positioning service comprises:

7. The terminal positioning method as claimed in claim 4, wherein the step of the base station judging whether the PRS signal needs to be retransmitted according to the traffic priority comprises:

8. The terminal positioning method according to claim 1, wherein the step of the base station retransmitting the lost PRS signal to the user and scheduling uplink resources for the user for transmitting PRS measurements comprises any one of:

9. A terminal positioning device, characterized in that, based on a network side, the network side comprises a base station and a location management network element, the device comprises:

10. A terminal positioning method, wherein, based on a terminal side, a network side includes a base station and a location management network element, the method includes:

11. A terminal positioning device, wherein, based on a terminal side, a network side includes a base station and a location management network element, the device comprising:

12. A communication device comprising a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; processor for reading a computer program in said memory and performing a terminal positioning method according to any of claims 1 to 9.

13. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the terminal positioning method according to any one of claims 1 to 9.