Patent Publication Number: US-2022214461-A1

Title: Positioning processing method and related apparatus

Description:
RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/CN2021/082738, entitled “POSITIONING PROCESSING METHOD AND RELATED APPARATUS” and filed on Mar. 24, 2021, which claims priority to Chinese Patent Application No. 202010369573.7, entitled “POSITIONING PROCESSING METHOD AND APPARATUS, COMPUTER-READABLE MEDIUM, AND ELECTRONIC DEVICE” and filed on May 4, 2020. The entire disclosures of the prior applications are hereby incorporated by reference in its entirety. 
    
    
     FIELD OF THE TECHNOLOGY 
     This application relates to the field of computer and communication technologies, including positioning processing. 
     BACKGROUND OF THE DISCLOSURE 
     The basic principle of a global navigation satellite system (GNSS)-real-time kinematic (RTK) based high-precision positioning mechanism is that an RTK server generates RTK assistance information suitable for an approximate location of a terminal device, and then transmits the RTK assistance information to the terminal for positioning. 
     SUMMARY 
     Embodiments of this disclosure include a positioning processing method and related apparatus, to improve the real-time performance of positioning at least to some extent. 
     Other features and advantages of this disclosure become obvious through the following detailed descriptions, or may be partially recognized through the practice of this disclosure. 
     According to one aspect of the embodiments of this disclosure, a positioning processing method is provided. In the method, a positioning request is received. The positioning request includes identification information of a device. Rough location information of the device is acquired from a core network according to the identification information of the device. Differential assistance information is generated according to the rough location information of the device. The differential assistance information is transmitted to the device. A positioning location of the device is determined based on the differential assistance information. 
     According to one aspect of the embodiments of this disclosure, a positioning processing method is provided. In the method, a rough location acquisition request is received from a positioning server. The rough location acquisition request includes identification information of a device. Rough location information of the device is acquired according to the identification information of the device. The rough location information of the device is transmitted to the positioning server. Differential assistance information is generated based on the rough location information. Positioning processing is performed based on the differential assistance information. 
     According to one aspect of the embodiments of this disclosure, a positioning processing apparatus including processing circuitry is provided. The processing circuitry is configured to receive a positioning request. The positioning request including identification information of a device. The processing circuitry is configured to acquire rough location information of the device from a core network according to the identification information of the device, generate differential assistance information according to the rough location information of the device. The processing circuitry is configured to transmit the differential assistance information to the device. A positioning location of the device is determined based on the differential assistance information. 
     According to one aspect of the embodiments of this application, a positioning processing apparatus including processing circuitry is provided. The processing circuitry is configured to receive a rough location acquisition request from a positioning server. The rough location acquisition request including identification information of a device. The processing circuitry is configured to acquire rough location information of the device according to the identification information of the device, and transmit the rough location information of the device to the positioning server. Differential assistance information is generated based on the rough location information. Positioning processing is performed based on the differential assistance information. 
     According to one aspect of the embodiments of this disclosure, a non-transitory computer-readable storage medium is provided, storing instructions which when executed by a processor cause the processor to perform any of the positioning processing methods according to the foregoing aspects. 
     According to one aspect of the embodiments of this disclosure, an electronic device is provided, including a processor, a communication interface, a memory, and a communication bus, 
     the processor, the communication interface, and the memory communicating with each other by using the communication bus; the communication interface being an interface of a communication module; 
     the memory being configured to store a program code, and transmit the program code to the processor; and the processor being configured to invoke instructions of the program code in the memory to perform any of the positioning processing methods according to the foregoing aspects. 
     According to one aspect of the embodiments of this disclosure, a computer program product including instructions is provided, the instructions, when run on a computer, causing the computer to perform the positioning processing method according to the foregoing aspects. 
     In the technical solutions provided in some embodiments of this disclosure, by acquiring rough location information of a to-be-positioned device from a core network, generating differential assistance information according to the rough location information, and transmitting the differential assistance information to the to-be-positioned device for positioning processing, a positioning server (for example, a real-time kinematic (RTK) server) can generate differential assistance information by acquiring the rough location information of the to-be-positioned device from the core network, so that an interaction process between the positioning server and the to-be-positioned device is reduced, and a delay for acquiring the rough location information of the to-be-positioned device is reduced, which is beneficial to improving the real-time performance of positioning. 
     It is to be understood that, the foregoing general descriptions and the following detailed descriptions are merely for illustration and explanation purposes and are not intended to limit this disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Accompanying drawings herein, which are incorporated into and constitute a part of this specification, show embodiments that conform to this disclosure, and are used for describing a principle of this disclosure together with this specification. The accompanying drawings described below are merely some embodiments of this disclosure, and a person of ordinary skill in the art may further obtain other accompanying drawings according to the accompanying drawings. In the accompanying drawings: 
         FIG. 1  shows an exemplary flowchart of interaction between a positioning server and a terminal. 
         FIG. 2  shows an exemplary flowchart of a positioning processing method according to an embodiment of this disclosure. 
         FIG. 3  shows an exemplary flowchart of a positioning processing method according to an embodiment of this disclosure. 
         FIG. 4  shows an exemplary flowchart of a positioning processing method according to an embodiment of this disclosure. 
         FIG. 5  shows an exemplary flowchart of a positioning processing method according to an embodiment of this disclosure. 
         FIG. 6  shows an exemplary block diagram of a positioning processing apparatus according to an embodiment of this disclosure. 
         FIG. 7  shows an exemplary block diagram of a positioning processing apparatus according to an embodiment of this disclosure. 
         FIG. 8  shows an exemplary computer system adapted to implement an electronic device of embodiments of this disclosure. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Exemplary implementations will now be described with reference to the accompanying drawings. However, the exemplary implementations may be implemented in various forms and are not to be understood as being limited to the examples described herein. 
     In addition, the described features, structures, or characteristics may be combined in one or more embodiments in any appropriate manner. In the following descriptions, details are provided for understanding of the embodiments of this disclosure. However, a person skilled in the art is to be aware that, the technical solutions in this disclosure may be implemented without one or more of the particular details, or another method, unit, apparatus, or step may be used. In other cases, well-known methods, apparatuses, implementations, or operations may not shown or described in detail, to avoid obscuring the aspects of this disclosure. 
     The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, the functional entities may be implemented in a software form, or in processing circuitry such as one or more hardware modules or integrated circuits, or in different networks and/or processor apparatuses and/or microcontroller apparatuses. 
     The flowcharts shown in the accompanying drawings are merely exemplary descriptions, do not need to include all content and operations/steps, and do not need to be performed in the described orders either. For example, some operations/steps may be further divided, while some operations/steps may be combined or partially combined. Therefore, an actual execution order may change according to an actual case. 
     The basic principle of a global navigation satellite system (GNSS)-real-time kinematic (RTK) based high-precision positioning mechanism is that an RTK server generates RTK assistance information suitable for an approximate location of a terminal device, and then transmits the RTK assistance information to the terminal for positioning. If the RTK server does not have the approximate location of the terminal, the terminal needs to report a location thereof to the RTK server, and then the RTK server transmits differential assistance information to the terminal. In this case, one more interaction process is required between the RTK server and the terminal, which leads to an increase in delay and affects the real-time performance of positioning. 
     As shown in  FIG. 1 , an interaction process between a positioning server and a terminal may include the following steps: 
     In step S 101 , after a terminal device establishes a protocol data unit (PDU) session, the terminal device reports rough location information to a positioning server (e.g., an RTK server) when a location service (LCS) client initiates a positioning request. The LCS client may be a client that is installed on the terminal device and that needs to use an LCS service. In other embodiments of this disclosure, the LCS client may alternatively be a client installed on the positioning server, or may alternatively be a client independent of the terminal device and the positioning server. 
     In step S 102 , the positioning server generates differential assistance information according to the rough location information reported by the terminal device. 
     In step S 103 , the positioning server transmits the differential assistance information to the terminal device. 
     In step S 104 , the terminal device performs GNSS-RTK measurement according to the differential assistance information transmitted by the positioning server. 
     In step S 105 , the terminal device reports an RTK measurement value to the positioning server. 
     In step S 106 , the positioning server performs positioning solution processing according to the RTK measurement value reported by the terminal device to obtain a positioning result, and then transmits the positioning result to the LCS client. 
     In the interaction process shown in  FIG. 1 , the terminal device transmits the rough location information to the positioning server. If an over the top (OTT, an OTT service such as an Internet company bypasses the operator and develops various video and data services based on an exposure Internet) method is adopted, and assuming that a round-trip time (RTT) delay between the positioning server and the terminal device is 10 ms in one direction, a finally formed positioning delay is increased by at least 20 ms because a time is also required for transmission of differential assistance information, RTK measurement, and positioning solution. However, for an application requiring real-time positioning information, especially for a terminal (e.g., an in-vehicle terminal or another intelligent terminal) lacking inertial navigation and another assisted positioning method, an excessive delay may easily cause a positioning deviation. 
     In addition, because the OTT method is likely to be adopted between the positioning server and the terminal device, a service data flow for positioning is not used as a control signaling for high-priority transmission. Therefore, the delay may be greater, and it is difficult for a GNSS-RTK positioning mechanism to adapt to a real-time positioning scenario, for example, an autonomous driving/unmanned driving scenario. Assuming that the OTT method is not adopted, but a method of pushing GNSS-RTK differential assistance information in advance is adopted, for example, pushing the GNSS-RTK differential assistance information through system information broadcasting, then an existing network base station needs to be updated and upgraded over an air interface. In addition, the system information broadcasting may occupy a large amount of broadcast radio resources, and the terminal device continuously monitors the GNSS-RTK information of differential positioning, which may further increase the processing overhead of the terminal device. 
     Based on the foregoing problems, embodiments of this disclosure include a lightweight GNSS-RTK short-latency positioning mechanism. The terminal device does not need to continuously monitor the GNSS-RTK differential assistance information broadcast by the base station, and the network device also does not need to be upgraded to support the broadcast of GNSS-RTK information over the air interface. To overcome the problem that the positioning server lacks the rough location information of the terminal device, the rough location information of the terminal device is provided by the core network to the positioning server by using the method of network capability exposure, so that an interaction process between the positioning server and the terminal device is reduced. 
     Exemplary implementation details of the technical solutions of the embodiments of this disclosure are described in detail below. 
       FIG. 2  shows an exemplary flowchart of a positioning processing method according to an embodiment of this disclosure. The positioning processing method may be performed by a positioning server, and the positioning server may be an RTK server. Referring to  FIG. 2 , the positioning processing method includes at least steps S 210  to S 240 , which are described in detail below. 
     In step S 210 , a positioning request is received, the positioning request including identification information of a to-be-positioned device. 
     In an embodiment of this disclosure, the positioning request may be transmitted by an LCS client. The identification information of the to-be-positioned device may be a generic public subscription identifier (GPSI) of the to-be-positioned device, or the identification information of the to-be-positioned device may be an international mobile subscriber identity (IMSI), a subscription permanent identifier (SUPI), or the like. 
     In step S 220 , rough location information of the to-be-positioned device is acquired from a core network according to the identification information of the to-be-positioned device. 
     In an embodiment of this disclosure, the acquiring rough location information of the to-be-positioned device from a core network may be transmitting a rough location acquisition request to the core network, the rough location acquisition request including the identification information of the to-be-positioned device, and then receiving the rough location information returned by the core network for the rough location acquisition request. 
     In an embodiment of this disclosure, the rough location information may be location-related information recorded by the core network during a connection and registration process of the terminal device. For example, for a terminal device in an idle state, the rough location information may be location information of a tracking area (TA) in which the terminal device is located. For a terminal device in a connected state, the rough location information may be location information of a cell to which the terminal device is registered. For a terminal device in an inactive state, the rough location information may be location information of a TA in which the terminal device is located, or may be location information of a RAN based notification area (RNA) of the terminal device. The RNA herein refers to a radio access network. 
     In an embodiment of this disclosure, the acquiring rough location information of the to-be-positioned device from a core network may further be acquiring a network address or a network address prefix of the to-be-positioned device from the core network according to the identification information of the to-be-positioned device, and then determining the rough location information of the to-be-positioned device based on the network address and the network address prefix. 
     In an embodiment of this disclosure, the positioning server may further indicate rough location acquisition delay information to the core network, the rough location acquisition delay information being used for indicating a time range of an acceptable delay for acquiring the rough location information. After obtaining the rough location acquisition delay information, and when it is within the time range of the acceptable delay, the core network may further perform a non-high-precision positioning on the to-be-positioned device to acquire the rough location information of the to-be-positioned device. 
     In an embodiment of this disclosure, the positioning server may further perform communication and interaction with the core network to negotiate with the core network a rough location information type satisfying a positioning precision requirement, the rough location information type being used for indicating precision of the rough location information. For example, the positioning server may negotiate with the core network whether the rough location information at the TA, RNA, and cell levels can satisfy the positioning precision requirement. When the positioning precision requirement cannot be satisfied, an IP address or an IP address prefix and other information may further be provided to calculate the rough location information of the to-be-positioned device. 
     In step S 230 , differential assistance information is generated according to the rough location information of the to-be-positioned device. 
     In step S 240 , the differential assistance information is transmitted to the to-be-positioned device, so that the to-be-positioned device performs positioning processing based on the differential assistance information. 
     In an embodiment of this disclosure, after the positioning server transmits the differential assistance information to the to-be-positioned device, the to-be-positioned device may measure a positioning signal based on the differential assistance information, and then transmit the positioning signal to the positioning server. In this way, the positioning server may perform positioning solution processing according to the received positioning signal, to obtain the positioning location of the to-be-positioned device. In an embodiment of this disclosure, after obtaining the positioning signal measured based on the differential assistance information, the to-be-positioned device may perform positioning solution processing to obtain the positioning location of the to-be-positioned device. 
     In an embodiment of this disclosure, after obtaining the positioning location for the to-be-positioned device, the positioning server may determine a deviation between the positioning location and the rough location information according to the positioning location and the rough location information of the to-be-positioned device. When the deviation between the positioning location and the rough location information is greater than a specified threshold, a target area corresponding to the rough location information may be determined according to the rough location information, and then information of the target area is provided to the core network, so that the core network optimizes the rough location information of the to-be-positioned device in the target area. For example, the core network may improve the precision of the rough location information of the to-be-positioned device in the target area by combining other positioning methods. 
     The technical solution of the embodiment shown in  FIG. 2  enables the positioning server to generate the differential assistance information by acquiring the rough location information of the to-be-positioned device from the core network, which reduces a delay for acquiring the rough location information of the to-be-positioned device, and is beneficial to improving the real-time performance of positioning. 
       FIG. 3  shows a flowchart of a positioning processing method according to an embodiment of this disclosure. The positioning processing method may be performed by a core network device. For example, the core network device may be a network exposure function (NEF) entity. Referring to  FIG. 3 , the positioning processing method includes at least steps S 310  to S 330 , which are described in detail below. 
     In step S 310 , a rough location acquisition request transmitted by a positioning server is received, the rough location acquisition request including identification information of a to-be-positioned device. 
     In an embodiment of this disclosure, the identification information of the to-be-positioned device may be a GPSI of the to-be-positioned device, or the identification information of the to-be-positioned device may be an IMSI, an SUFI, or the like. 
     In step S 320 , rough location information of the to-be-positioned device is acquired according to the identification information of the to-be-positioned device. 
     In an embodiment of this disclosure, location-related information of the to-be-positioned device recorded during a connection and registration process of the to-be-positioned device may be acquired according to the identification information of the to-be-positioned device, the location-related information including location information of a TA, location information of a registered cell, and location information of an RNA. For example, for a terminal device in an idle state, the rough location information may be location information of a TA in which the terminal device is located. For a terminal device in a connected state, the rough location information may be location information of a cell to which the terminal device is registered. For a terminal device in an inactive state, the rough location information may be location information of a TA in which the terminal device is located, or may be location information of an RNA of the terminal device. 
     In an embodiment of this disclosure, the core network device may further acquire rough location acquisition delay information transmitted by the positioning server. When a time delay of performing a positioning operation on the to-be-positioned device is less than a time range of an acceptable delay identified by the rough location acquisition delay information, the core network device may also perform the positioning operation on the to-be-positioned device according to the identification information of the to-be-positioned device, and then transmit a positioning result as the rough location information to the positioning server. 
     In step S 330 , the rough location information of the to-be-positioned device is transmitted to the positioning server, so that the positioning server generates differential assistance information based on the rough location information, and performs positioning processing based on the differential assistance information. 
     In an embodiment of this disclosure, for the solution that the positioning server generates differential assistance information based on the rough location information, and performs positioning processing based on the differential assistance information, reference may be made to the technical solutions of the foregoing embodiments. 
     The technical solution of the embodiment shown in  FIG. 3  enables the core network device to transmit the rough location information of the to-be-positioned device to the positioning server, so that the positioning server generates the differential assistance information, thereby reducing the delay for acquiring the rough location information of the to-be-positioned device by the positioning server, which is beneficial to improving the real-time performance of positioning. 
     In the foregoing embodiments, the technical solutions of the embodiments of this disclosure are described from the perspectives of the positioning server and the core network device respectively. The following describes the implementation details of the positioning processing method of the embodiments of this disclosure in detail with reference to  FIG. 4  and  FIG. 5 . 
     As shown in  FIG. 4 , according to the positioning processing method of an embodiment of this disclosure, after the terminal device and the core network establish a PDU session, an interaction process between entities includes the following steps: 
     In step S 401 , an LCS client transmits a positioning request to a positioning server, where the positioning request includes a user equipment (UE) identifier, and the UE identifier is an identifier of a device that needs to be positioned, and for a 5G system, the identifier may be a GPSI. 
     In step S 402 , the positioning server transmits a request for acquiring a rough location of a terminal device to a core network. 
     In an embodiment of this disclosure, the positioning server and a network RTK server may be separate entities, or deployed in one entity. In an embodiment, the positioning server may be used as an application function (AF) to acquire capability exposure information, that is, rough location information of the terminal device, from a 5G core network. 
     In an embodiment of this disclosure, whether to initiate a request for acquiring a rough location may be determined according to the positioning precision requirement. For some scenarios that do not require high-precision positioning, for example, long-distance cargo transportation, because it is only necessary to learn which road section the transport vehicle is currently located on (the positioning precision can be within a few hundred meters or 1 kilometer), there is no need to trigger an operation of a high-precision positioning request. For scenarios that require high-precision positioning, a high-precision positioning operation needs to be triggered, that is, the rough location information of the terminal device needs to be obtained. 
     In an embodiment of this application, after transmitting the request for acquiring the rough location information, the positioning server may indicate a delay range for acquiring the rough location information to the core network. The rough location information in the core network may not need to be acquired specially because the rough location information of the terminal device can already be obtained during the process of connection and registration management of the terminal device. In this case, a time delay for the positioning server to acquire the rough location information is very short. When the time delay is within an acceptable delay range, the core network may also perform a non-high-precision positioning operation. 
     In step S 403 , the core network informs the positioning server of the rough location of the terminal device. 
     In an embodiment of this disclosure, the rough location information may also be a TA of a terminal in an idle state or an inactive state, a cell ID of a terminal in a connected state, an RNA of a terminal in an inactive state, or the like. The information of such a type may be acquired without any additional positioning calculation performed by the core network. The reason is that for terminals in different radio resource control (RRC) states, the TA, cell, and RNA have been maintained. That is, a network of the operator may still provide the information even if the network does not support specific positioning algorithms. 
     In an embodiment of this disclosure, the core network may transmit the rough location of the terminal device to an AF, and then the AF interacts with the positioning server to transmit the rough location to the positioning server. When the AF and the positioning server are deployed in the same entity, there is no need for an interaction between the entities. 
     In step S 404 , the positioning server generates differential assistance information according to the rough location information provided by the core network. After obtaining the rough location information provided by the core network, the positioning server may obtain precise differential assistance information based on the rough location information. 
     In step S 405 , the positioning server transmits the differential assistance information to the terminal device. 
     In step S 406 , the terminal device performs GNSS-RTK measurement according to the differential assistance information transmitted by the positioning server. 
     In step S 407 , the terminal device reports an RTK measurement value to the positioning server. 
     In step S 408 , the positioning server performs positioning solution processing according to the RTK measurement value reported by the terminal device to obtain a positioning result, and then transmits the positioning result to the LCS client. 
     As shown in  FIG. 5 , according to the positioning processing method of an embodiment of this disclosure, after the terminal device and the core network establish a PDU session, an interaction process between entities includes the following steps: 
     In step S 501 , an LCS client transmits a positioning request to a positioning server, where the positioning request includes a user equipment (UE) identifier, and the UE identifier is an identifier of a device that needs to be positioned, and for a 5G system, the identifier may be a GPSI. 
     In step S 502 , the positioning server transmits a request for acquiring a rough location of a terminal device to a core network. 
     In an embodiment of this disclosure, the positioning server and a network RTK server may be separate entities, or deployed in one entity. In an embodiment, the positioning server may be used as an AF to acquire capability exposure information, that is, rough location information of the terminal device, from a 5G core network. 
     In an embodiment of this disclosure, whether to initiate a request for acquiring a rough location may be determined according to the positioning precision requirement. For some scenarios that do not require high-precision positioning, for example, long-distance cargo transportation, because it is only necessary to learn which road section the transport vehicle is currently located on (the positioning precision can be within a few hundred meters or 1 kilometer), there is no need to trigger an operation of a high-precision positioning request. For scenarios that require high-precision positioning, a high-precision positioning operation needs to be triggered, that is, the rough location information of the terminal device needs to be obtained. 
     In an embodiment of this disclosure, after transmitting the request for acquiring the rough location information, the positioning server may indicate a delay range for acquiring the rough location information to the core network. The rough location information in the core network may not need to be acquired specially because the rough location information of the terminal device can already be obtained during the process of connection and registration management of the terminal device. In this case, a time delay for the positioning server to acquire the rough location information is very short. When the time delay is within an acceptable delay range, the core network may also perform a non-high-precision positioning operation. 
     In step S 503 , the core network informs the positioning server of the rough location of the terminal device. 
     In an embodiment of this disclosure, the rough location information may also be a TA of a terminal in an idle state or an inactive state, a cell ID of a terminal in a connected state, an RNA of a terminal in an inactive state, or the like. The information of such a type may be acquired without any additional positioning calculation performed by the core network. The reason is that for terminals in different RRC states, the TA, cell, and RNA have been maintained. That is, a network of the operator may still provide the information even if the network does not support specific positioning algorithms. 
     In an embodiment of this disclosure, the core network may transmit the rough location of the terminal device to an AF, and then the AF interacts with the positioning server to transmit the rough location to the positioning server. When the AF and the positioning server are deployed in the same entity, there is no need for an interaction between the entities. 
     In step S 504 , the positioning server generates differential assistance information according to the rough location information provided by the core network. After obtaining the rough location information provided by the core network, the positioning server may obtain precise differential assistance information based on the rough location information. 
     In step S 505 , the positioning server transmits the differential assistance information to the terminal device. 
     In step S 506 , the terminal device performs GNSS-RTK measurement according to the differential assistance information transmitted by the positioning server, and performs positioning solution processing according to a measurement result to obtain a positioning result. 
     In an embodiment of this disclosure, when the LCS client is deployed in the terminal device, the terminal device may directly use the positioning result after the positioning result is obtained by performing the positioning solution. When the LCS client is not deployed in the terminal device, after obtaining the positioning result, the terminal device may transmit the positioning result to the LCS client. 
     For the embodiments shown in  FIG. 4  and  FIG. 5 , the positioning server (the positioning server may be an AF or an RTK server) may interact with the core network in advance and dynamically (the process may be independent of each positioning service), and determine in advance whether rough positions at the TA, RNA, and cell levels can satisfy the requirement of high-precision positioning assistance data. When the precision of these rough locations is poor (such as the TA), then the core network may further provide other information to assist the positioning server to infer the rough location of the terminal device. For example, the positioning server may calculate a rough geographic location of the terminal device according to information such as an IP address or an IP address prefix. The operator of the positioning server may also share information with the network operator, for example, pre-evaluate a position of the base station in the network. The positioning server may also perform dynamic statistical learning by comparing a rough position and an RTK positioning result, and mark a geographical area with an excessively large rough position deviation. The network operator may improve the positioning precision of these areas by combining overlay 4G network information and other methods, and the network operator may even provide the positioning result of the terminal device (provided that the positioning delay is controlled within a certain range) to the positioning server through non-high-precision positioning to assist the positioning server to generate differential positioning information. 
     In the technical solutions of the embodiments of this disclosure, the problem of an excessive delay in final positioning due to the excessive delay in acquiring the rough position can be avoided in the high-precision positioning solution based on the OTT method, which improves the real-time performance of positioning, and is beneficial to positioning service deployment and improving user experience. 
     The following describes apparatus embodiments of this disclosure, which may be used for performing the positioning processing method in the foregoing embodiments of this disclosure. For details not disclosed in the apparatus embodiments of this disclosure, reference may be made to the foregoing embodiments of the positioning processing method of this disclosure. 
       FIG. 6  shows a block diagram of a positioning processing apparatus according to an embodiment of this disclosure. 
     Referring to  FIG. 6 , a positioning processing apparatus  600  according to an embodiment of this disclosure includes: a first receiving unit  602 , a first acquisition unit  604 , a generation unit  606 , and a first transmitting unit  608 . One or more units of the apparatus can be implemented by processing circuitry, software, or a combination thereof, for example. 
     The first receiving unit  602  is configured to receive a positioning request, the positioning request including identification information of a to-be-positioned device. The first acquisition unit  604  is configured to acquire rough location information of the to-be-positioned device from a core network according to the identification information of the to-be-positioned device. The generation unit  606  is configured to generate differential assistance information according to the rough location information of the to-be-positioned device. The first transmitting unit  608  is configured to transmit the differential assistance information to the to-be-positioned device, so that the to-be-positioned device performs positioning processing based on the differential assistance information. 
     In some embodiments of this disclosure, based on the foregoing solutions, the first acquisition unit  604  is configured to: transmit a rough location acquisition request to the core network, the rough location acquisition request including the identification information of the to-be-positioned device; and receive rough location information returned by the core network for the rough location acquisition request. 
     In some embodiments of this disclosure, based on the foregoing solutions, the first transmitting unit  608  is further configured to: indicate rough location acquisition delay information to the core network, the rough location acquisition delay information being used for indicating a time range of an acceptable delay for acquiring the rough location information. 
     In some embodiments of this disclosure, based on the foregoing solutions, when the to-be-positioned device is in an idle state, the rough location information includes location information of a TA in which the to-be-positioned device is located. When the to-be-positioned device is in a connected state, the rough location information includes location information of a cell to which the to-be-positioned device is registered. When the to-be-positioned device is in an inactive state, the rough location information includes at least one of the following: the location information of the TA in which the to-be-positioned device is located, and location information of an RNA of the to-be-positioned device. 
     In some embodiments of this disclosure, based on the foregoing solutions, the first receiving unit  602  is further configured to receive a positioning signal measured by the to-be-positioned device based on the differential assistance information, and determine a positioning location for the to-be-positioned device based on the positioning signal. 
     In some embodiments of this disclosure, based on the foregoing solutions, the first acquisition unit  604  is configured to: acquire a network address or a network address prefix of the to-be-positioned device from the core network according to the identification information of the to-be-positioned device; and determine the rough location information of the to-be-positioned device based on the network address or the network address prefix. 
     In some embodiments of this disclosure, based on the foregoing solutions, the first acquisition unit  604  is further configured to: acquire a positioning location for the to-be-positioned device; and the first transmitting unit  608  is further configured to: determine a target area corresponding to the rough location information when it is determined that a deviation between the rough location information and the positioning location is greater than a specified threshold according to the positioning location and the rough location information, and provide information of the target area to the core network, so that the core network optimizes rough location information of a to-be-positioned device in the target area. 
     In some embodiments of this disclosure, based on the foregoing solutions, the positioning processing apparatus  600  further includes: an interaction unit, configured to perform communication and interaction with the core network to negotiate with the core network a rough location information type that can satisfy a positioning precision requirement, the rough location information type being used for indicating precision of the rough location information. 
       FIG. 7  shows a block diagram of a positioning processing apparatus according to an embodiment of this disclosure. 
     Referring to  FIG. 7 , a positioning processing apparatus  600  according to an embodiment of this disclosure includes: a second receiving unit  702 , a second acquisition unit  704 , and a second transmitting unit  706 . One or more units of the apparatus can be implemented by processing circuitry, software, or a combination thereof, for example. 
     The second receiving unit  702  is configured to receive a rough location acquisition request transmitted by a positioning server, the rough location acquisition request including identification information of a to-be-positioned device. The second acquisition unit  704  is configured to acquire rough location information of the to-be-positioned device according to the identification information of the to-be-positioned device. The second transmitting unit  706  is configured to transmit the rough location information of the to-be-positioned device to the positioning server, so that the positioning server generates differential assistance information based on the rough location information, and performs positioning processing based on the differential assistance information. 
     In some embodiments of this disclosure, based on the foregoing solutions, the second acquisition unit  704  is configured to: acquire, according to the identification information of the to-be-positioned device, location-related information of the to-be-positioned device recorded during a connection and registration process of the to-be-positioned device, the location-related information including location information of a TA, location information of a registered cell, and location information of an RNA. 
     In some embodiments of this disclosure, based on the foregoing solutions, the second acquisition unit  704  is configured to: acquire rough location acquisition delay information transmitted by the positioning server, the rough location acquisition delay information being used for indicating a time range of an acceptable delay for acquiring the rough location information; and when a time delay of performing a positioning operation on the to-be-positioned device is less than the time range, perform the positioning operation on the to-be-positioned device according to the identification information of the to-be-positioned device, and use a positioning result as the rough location information. 
       FIG. 8  shows a schematic structural diagram of an exemplary computer system adapted to implement an electronic device of embodiments of this disclosure. 
     A computer system  800  of the electronic device shown in  FIG. 8  is merely an example, and does not constitute any limitation on functions and use ranges of the embodiments of this disclosure. 
     As shown in  FIG. 8 , the computer system  800  includes processing circuitry such as a central processing unit (CPU)  801 , which may perform various suitable actions and processing based on a program stored in a read-only memory (ROM)  802  or a program loaded from a storage part  808  into a random access memory (RAM)  803 , for example, perform the method according to the foregoing embodiments. The RAM  803  further stores various programs and data required for system operations. The CPU  801 , the ROM  802 , and the RAM  803  are connected to each other through a bus  804 . An input/output (I/O) interface  805  is also connected to the bus  804 . 
     The following components are connected to the I/O interface  805 : an input part  806  including a keyboard, a mouse, or the like; an output part  807  including a cathode ray tube (CRT), a liquid crystal display (LCD), a speaker, or the like; a storage part  808  including a hard disk, or the like; and a communication part  809  including a network interface card such as a local area network (LAN) card, a modem, or the like. The communication part  809  performs communication processing by using a network such as the Internet. A drive  810  is also connected to the I/O interface  805  as required. A removable medium  811 , such as a magnetic disk, an optical disc, a magneto-optical disk, or a semiconductor memory, is installed on the drive  810  as required, so that a computer program read from the removable medium is installed into the storage part  808  as required. 
     Particularly, according to an embodiment of this disclosure, the processes described in the following by referring to the flowcharts may be implemented as computer software programs. For example, an embodiment of this disclosure includes a computer program product. The computer program product includes a computer program stored in a computer-readable medium. The computer program includes a computer program used for performing a method shown in the flowchart. In such an embodiment, the computer program may be downloaded and installed from the network through the communication part  809 , and/or installed from the removable medium  811 . When the computer program is executed by the CPU  801 , the various functions defined in the system of this disclosure are executed. 
     The computer-readable medium shown in the embodiments of this disclosure may be a computer-readable signal medium or a computer-readable storage medium or any combination thereof. The computer-readable storage medium may be, for example, but is not limited to, an electric, magnetic, optical, electromagnetic, infrared, or semi-conductive system, apparatus, or component, or any combination thereof. A more specific example of the computer-readable storage medium may include a non-transitory computer-readable storage medium but is not limited to: an electrical connection having one or more wires, a portable computer magnetic disk, a hard disk, a RAM, a ROM, an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any appropriate combination thereof. In this disclosure, the computer-readable storage medium may be any tangible medium containing or storing a program, and the program may be used by or used in combination with an instruction execution system, apparatus, or device. In this disclosure, the computer-readable signal medium may include a data signal transmitted in a baseband or as part of a carrier, and stores a computer-readable computer program. The data signal propagated in such a way may assume a plurality of forms, including, but is not limited to, an electromagnetic signal, an optical signal, or any appropriate combination thereof. The computer-readable signal medium may be further any computer-readable medium in addition to a computer-readable storage medium. The computer-readable medium may send, propagate, or transmit a program that is used by or used in combination with an instruction execution system, apparatus, or device. The computer program included in the computer-readable medium may be transmitted by using any suitable medium, including, but is not limited to: a wireless medium, a wired medium, or the like, or any suitable combination thereof. 
     The flowcharts and block diagrams in the accompanying drawings illustrate possible system architectures, functions, and operations that may be implemented by a system, a method, and a computer program product according to various embodiments of this disclosure. Each box in a flowchart or a block diagram may represent a module, a program segment, or a part of code. The module, the program segment, or the part of code includes one or more executable instructions used for implementing specified logic functions. In some implementations used as substitutes, functions annotated in boxes may alternatively occur in a sequence different from that annotated in an accompanying drawing. For example, actually two boxes shown in succession may be performed basically in parallel, and sometimes the two boxes may be performed in a reverse sequence. This is determined by a related function. Each box in a block diagram and/or a flowchart and a combination of boxes in the block diagram and/or the flowchart may be implemented by using a dedicated hardware-based system configured to perform a specified function or operation, or may be implemented by using a combination of dedicated hardware and a computer instruction. 
     A related unit described in the embodiments of this disclosure may be implemented in a software manner, or may be implemented in a hardware manner, and the unit described can also be set in a processor. Names of the units do not constitute a limitation on the units in a specific case. 
     According to another aspect, this disclosure further provides a computer readable medium. The computer readable medium may be included in the electronic device according to the foregoing embodiments, or may exist alone without being assembled into the electronic device. The computer-readable medium carries one or more programs, the one or more programs, when executed by the electronic device, causing the electronic device to implement the method according to the foregoing embodiments. 
     An embodiment of this disclosure further provides a computer program product including instructions, the instructions, when run on a computer, causing the computer to perform the method according to the foregoing embodiments. 
     Although a plurality of modules or units of a device configured to perform actions are discussed in the foregoing detailed description, such division is not mandatory. Actually, according to the implementations of this disclosure, the features and functions of two or more modules or units described above may be specifically implemented in one module or unit. On the contrary, the features and functions of one module or unit described above may be further divided to be embodied by a plurality of modules or units. 
     Through the descriptions of the foregoing implementations, a person skilled in the art should recognize that the exemplary implementations described herein may be implemented through software, or may be implemented through software located in combination with necessary hardware. Therefore, the technical solutions of the embodiments of this disclosure may be implemented in a form of a software product. The software product may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a removable hard disk, or the like) or on the network, including several instructions for instructing a computing device (which may be a personal computer, a server, a touch terminal, a network device, or the like) to perform the methods according to the embodiments of this disclosure. 
     After considering the specification and practicing the disclosed embodiments, a person skilled in the art may conceive of other implementations of this disclosure. This disclosure is intended to cover any variations, uses, or adaptive changes of this disclosure following the general principles of this disclosure, and includes well-known knowledge and conventional technical means in the art and undisclosed in this disclosure. 
     It is to be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope of this disclosure.