WO2020207116A1

WO2020207116A1 - Terminal location based service method and apparatus

Info

Publication number: WO2020207116A1
Application number: PCT/CN2020/075612
Authority: WO
Inventors: 倪春林; 傅婧
Original assignee: 电信科学技术研究院有限公司
Priority date: 2019-04-10
Filing date: 2020-02-17
Publication date: 2020-10-15
Also published as: CN111836182B; CN111836182A

Abstract

Disclosed are a terminal location based service method and apparatus. The method comprises: a first access node receiving a location determination request message sent by a mobility management entity, wherein the first access node is an original service access node of a target terminal, and the first access node is associated with a local LMF for providing a location based service for the target terminal; when the local LMF initiates a location based service process, the first access node detecting that the target terminal is in an RRC inactive state, and then paging the target terminal; the first access node receiving location based service routing indication information sent by a third access node, wherein the third access node is the current service access node of the target terminal, and the location based service routing indication information is used for indicating a first routing mode and a second routing mode; and the first access node receiving location information, sent by a first network device, of the target terminal, and sending, to the mobility management entity, a location determination response message carrying the location information of the target terminal.

Description

Method and device for terminal positioning service

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 10, 2019, the application number is 201910284175.2, and the application name is "a terminal positioning service method and device", the entire content of which is incorporated into this application by reference in.

Technical field

This application relates to the field of wireless communication technology, and in particular to a terminal positioning service method and device.

Background technique

Location-Based Services (LBS) technology is a service technology that obtains terminal location information through wireless communication networks or other positioning systems, and then combines geographic information systems to provide various location-related information for the terminal. Today, outdoor positioning technology based on the Global Navigation Satellite System (GNSS) has been widely used in various fields. With the development of wireless communication, based on the fourth generation (Fourth Generation, 4G) mobile communication network High-precision positioning technology also effectively fills the gap in the positioning of satellite navigation systems. At present, the mobile communication network has entered the fifth generation (5G) mobile communication technology era. Compared with the 4G positioning network architecture, the 5G positioning network architecture should have higher accuracy and lower latency positioning requirements.

Summary of the invention

The embodiments of the present application provide a terminal positioning service method and device, which are used to provide a positioning service for a target terminal when the terminal moves across nodes.

In a first aspect, a terminal location service method is provided, including: a first access node receives a determination location request message sent by a mobility management function entity, the determination location request message is used to request to provide a location service for a target terminal; The first access node is the original serving access node of the target terminal, and the first access node is associated with a local location management function (Location Management Function, LMF), and the local LMF is controlled by the mobility management function entity. Select to provide location services for the target terminal; the first access node detects that the target terminal is in radio resource control (Radio Resource Control, RRC) when the local LMF initiates the location service process of the target terminal In the inactive state, request the access node in the notification area where the first access node is located to page the target terminal; the first access node receives the location service routing indication information sent by the third access node, The third access node is the current serving access node of the target terminal, the location service routing indication information is used to indicate a first routing mode or a second routing mode, and the first routing mode is the local LMF The associated access node performs message routing with the third access node through the mobility management function entity, and the second routing mode is for the access node associated with the local LMF to perform message routing with the third access node Routing; the first access node receives the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the A mobility management function entity, when the location service routing indication information indicates a second routing mode, the first network device is a third access node; the first access node sends a determination location to the mobility management function entity A response message, where the location determination response message carries the location information of the target terminal.

Optionally, the location service routing indication information is carried in a context request message of the target terminal, and the context request message of the target terminal is sent after the third access node paging to the target terminal; After the first access node receives the context request message of the target terminal sent by the third access node, the method further includes: in response to the context request message of the target terminal, the first access node sends the third access node The ingress node sends the context response message of the target terminal; the context response message of the target terminal carries the context information of the target terminal and the location service information of the target terminal.

Optionally, before the first access node receives the location information of the target terminal sent by the first network device, the method further includes: the first access node transfers the local LMF according to the location service routing indication information The sent Long Term Evolution Positioning Protocol (LLP) transmission message is sent to the first network device, and the LLP transmission message carries the identifier of the target terminal and LLP information.

Optionally, the first access node sending the LLP message sent by the local LMF to the first network device according to the location service routing indication information includes: if the location service routing indication information indicates the first Routing mode, the first access node sends the LLP transmission message sent by the local LMF to the mobility management function entity, so that the mobility management function entity sends a downlink contactless message to the third access node Non-access Stratum (NAS) transmission message to obtain the location information of the target terminal; wherein, the downlink NAS transmission message carries the identification of the target terminal and the LLP information; if the location service route If the indication information indicates the second routing mode, the first access node sends the LLP transmission message sent by the local LMF to the third access node to obtain the location information of the target terminal.

Optionally, the location determination request message received by the first access node carries the identifier of the target terminal and the location service information of the target terminal, wherein the location service information includes at least a positioning session identifier and the target Positioning QoS information of the terminal.

In a second aspect, a terminal location service method is provided, including: a second access node receives a determination location request message sent from a mobility management function entity, where the determination location request message is used to request to provide a location service for a target terminal, and The determination location request message carries information of the first access node, and the information of the first access node is the serving access node information of the target terminal stored by the mobility management function entity; wherein, the second access node The ingress node is associated with a local LMF, and the local LMF is selected by the mobility management function entity to provide location services for the target terminal; the second access node sends an LLP transmission message to the first access node; the The second access node receives the location service routing indication information sent by the first access node, where the location service routing indication information is used to indicate the first routing mode or the second routing mode, and the first routing mode is the The access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing mode is the access node associated with the local LMF and the third access node Wherein, the location service routing indication information is determined by a third access node and sent to the first access node, the third access node is the current serving access node of the target terminal, and the positioning The service routing indication information is sent by the third access node after paging the target terminal in response to the paging request of the first access node; the second access node receives the first network device Location information of the target terminal sent; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the mobility management function entity, and when the location service routing indication information indicates In the second routing mode, the first network device is the third access node; the second access node sends a location determination response message to the mobility management function entity, and the location determination response message carries the Location information of the target terminal.

Optionally, sending, by the second access node, the LLP transmission message to the first access node includes: the second access node sending the LLP transmission message to the mobility management function entity, so that all The mobility management function entity sends the LLP transmission message to the first access node according to the stored service access node information of the target terminal.

Optionally, before the second access node receives the location information of the target terminal sent by the first network device, the method further includes: the second access node transfers the location information according to the location service routing indication information The LLP transmission message sent by the local LMF is sent to the first network device.

Optionally, the second access node sending the LLP transmission message sent by the local LMF to the first network device according to the location service routing indication information includes: if the location service routing indication information indicates the first network device In a routing mode, the second access node sends the LLP transmission message sent by the local LMF to the mobility management function entity, so that the mobility management function entity sends a downlink NAS to the third access node Transmit a message to obtain the location information of the target terminal; wherein the downlink NAS transmission message carries the identification of the target terminal and the LLP information; if the location service routing indication information indicates the second routing mode, then The second access node sends the LLP transmission message sent by the local LMF to the third access node to obtain the location information of the target terminal.

Optionally, the location determination request message received by the second access node carries the identifier of the target terminal and the location service information of the target terminal, wherein the location service information includes at least a positioning session identifier and the target Positioning QoS information of the terminal.

Optionally, the LLP transmission message carries the identifier of the target terminal and the LLP information.

In a third aspect, a terminal location service method is provided, which includes: after a third access node pages a target terminal in response to a paging request from a first access node, determining location service routing indication information for the target terminal, and The location service routing indication information is used to indicate the first routing mode or the second routing mode, and the first routing mode is that the access node associated with the local LMF performs message routing with the third access node through the mobility management function entity. The second routing method is that the access node associated with the local LMF performs message routing with the third access node, and the local LMF is the local LMF associated with the first access node or the access node associated with the second access node. Local LMF; wherein, the local LMF is the LMF selected by the mobility management function entity to provide location services for the target terminal, the first access node is the original serving access node of the target terminal, and the The second access node is a non-serving access node of the target terminal in the notification area where the first access node is located, and the third access node is the current serving access node of the target terminal; The third access node sends the location information of the target terminal to the first network device according to the location service routing indication information; wherein, when the location service routing indication information indicates the first routing mode, the first network device is For the mobility management function entity, when the location service routing indication information indicates a second routing mode, the first network device is an access node associated with the local LMF.

Optionally, after the third access node determines location service routing indication information for the target terminal, the method further includes: the third access node sends a context request of the target terminal to the first access node Message, the context request message of the target terminal carries the location service routing indication information; the third access node receives the target terminal sent by the first access node in response to the context request message of the target terminal The context response message of the target terminal carries the context information of the target terminal and the location service information of the target terminal, wherein the location service information includes at least a positioning session identifier and the location of the target terminal QoS information.

Optionally, the method further includes: the third access node receives the location service information of the target terminal sent by the first access node; the third access node according to the location service routing instruction Before the information sends the location information of the target terminal to the first network device, it further includes: the third access node obtains the location information of the target terminal according to the location service information of the target terminal.

Optionally, the location service routing indication information indicates the first routing mode; before the third access node sends the location information of the target terminal to the first network device, the method further includes: The mobility management function entity sends a path switch request message, where the path switch request message carries location service routing indication information for indicating the first routing mode; the third access node receives the path sent by the mobility management function entity Switch response message.

Optionally, before the third access node sends the location information of the target terminal to the first network device, the method further includes: the third access node receives the LLP transmission message sent by the first network device, and The LLP transmission message carries the identifier of the target terminal and LLP information.

In a fourth aspect, a terminal location service method is provided, including: a mobile management function entity receives a location service request message from a gateway location center (Gateway Mobile Location Center, GMLC), where the location service request message is used to request selection of a target terminal LMF; the mobility management function entity selects a local LMF that provides location services for the target terminal, and sends a location determination request message to the local LMF, and the access node associated with the local LMF is the first access node or the first access node Two access nodes; wherein, the first access node is the serving access node of the target terminal stored by the mobility management function entity, and the second access node is the serving access node where the Notify the non-serving access node of the target terminal in the area; the mobility management function entity responds to the uplink NAS message from the third access node and sends the location information of the target terminal to the local LMF, the The third access node is the current serving access node of the target terminal, the uplink NAS message carries the location information of the target terminal; the mobility management function entity receives the determination location response message from the local LMF, And sending a location service response message to the GMLC, where the determining location response message and the location service response message carry the location information of the target terminal.

Optionally, before the mobility management function entity sends a positioning message to the local LMF, it further includes: the mobility management function entity sends to the third access node in response to the LLP transmission message from the local LMF A downlink NAS message, the LLP transmission message and the downlink NAS message carry the target terminal's identity and LLP information.

Optionally, the method further includes: the mobility management function entity receives a path switch request message from the third access node, and sends a path switch response message to the third access node; wherein, The path switching request message carries location service routing indication information, and the location service routing indication information is used to instruct the third access node to perform message routing with the access node associated with the local LMF through the mobility management function entity.

Optionally, the local LMF is a local LMF associated with the second access node; after the mobility management function entity sends a positioning determination request message to the local LMF, it further includes: the mobility management function entity receives The local LMF sends an LLP transmission message in response to the determine location request message; the mobility management function entity sends the LLP transmission message to the first access node.

Optionally, the location determination request message sent by the mobility management function entity carries the identifier of the target terminal and the location service information of the target terminal, wherein the location service information includes at least a location session identifier and the target terminal Location QoS information.

Optionally, the mobility management function entity is AMF or MME.

In a fifth aspect, an access node device is provided, including: a receiving unit, a processing unit, and a sending unit; the receiving unit is configured to receive a determination location request message sent by a mobility management function entity, and the determination location request message is used for Request to provide location services for the target terminal; wherein, the first access node is the original serving access node of the target terminal, the first access node is associated with a local positioning management function LMF, and the local LMF is The mobility management function entity selects to provide location services for the target terminal; the processing unit is configured to detect that the target terminal is in a radio resource control RRC status when the local LMF initiates the location service process of the target terminal In the activated state, the sending unit requests the access node in the notification area where the first access node is located to page the target terminal; the receiving unit is also used to receive the location sent by the third access node Service routing indication information, the third access node is the current serving access node of the target terminal, and the location service routing indication information is used to indicate the first routing mode or the second routing mode, the first routing mode The access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing mode is that the access node associated with the local LMF and the third access node The access node performs message routing; the receiving unit is further configured to receive the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the second A network device is the mobility management function entity, and when the location service routing indication information indicates the second routing mode, the first network device is a third access node; the sending unit is configured to send a message to the mobile The management function entity sends a location determination response message, where the location determination response message carries the location information of the target terminal.

In a sixth aspect, an access node device is provided, which includes: a receiving unit, a processing unit, and a sending unit; the receiving unit is configured to receive a determination location request message sent from a mobility management function entity, the determination location request The message is used to request to provide a location service for the target terminal, the confirm location request message carries the information of the first access node, and the information of the first access node is the service of the target terminal stored by the mobility management function entity Access node information; wherein, the second access node is associated with a local location management function LMF, and the local LMF is selected by the mobility management function entity to provide location services for the target terminal; the sending unit is used to: Sending a Long Term Evolution Location Protocol LLP transmission message to the first access node; the receiving unit is further configured to receive location service routing indication information sent by the first access node, where the location service routing indication information is used for Indicate the first routing mode or the second routing mode, the first routing mode is that the access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing mode The routing mode is the access node associated with the local LMF and the third access node; wherein the location service routing indication information is determined by the third access node and sent to the first access node, and The third access node is the current serving access node of the target terminal, and the location service routing indication information is that the third access node paged to the first access node in response to the paging request of the first access node. Sent after the target terminal; the receiving unit is further configured to receive the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the The first network device is the mobility management function entity, and when the location service routing indication information indicates the second routing mode, the first network device is the third access node; the sending unit is further configured to: Send a location determination response message to the mobility management function entity, where the location determination response message carries the location information of the target terminal.

In a seventh aspect, there is provided an access node device, including: a receiving unit, a processing unit, and a sending unit; the processing unit is configured to respond to a paging request of a first access node after paging a target terminal, and The target terminal determines location service routing indication information, the location service routing indication information is used to indicate the first routing mode or the second routing mode, and the first routing mode is the local location management function LMF associated access node through the mobility management function The entity performs message routing with a third access node, and the second routing mode is that the access node associated with the local LMF performs message routing with the third access node, and the local LMF is the first access node. A local LMF associated with a node or a local LMF associated with a second access node; wherein the local LMF is an LMF selected by the mobility management function entity to provide location services for the target terminal, and the first access node is The original serving access node of the target terminal, the second access node is the non-serving access node of the target terminal in the notification area where the first access node is located, and the third access node is the The current serving access node of the target terminal; the processing unit is further configured to send the location information of the target terminal to the first network device through the sending unit according to the location service routing instruction information; wherein, when the When the location service routing indication information indicates the first routing mode, the first network device is the mobility management function entity, and when the location service routing indication information indicates the second routing mode, the first network device is the The access node associated with the local LMF.

In an eighth aspect, a mobile management function entity device is provided, including: a receiving unit, a processing unit, and a sending unit; the receiving unit is configured to receive a location service request message from a gateway location center GMLC, and the location service request message is used Select a location management function LMF for the target terminal upon request; the processing unit is used to select a local LMF that provides location services for the target terminal, and send a location determination request message to the local LMF through the sending unit, The access node associated with the local LMF is the first access node or the second access node; wherein, the first access node is the serving access node of the target terminal stored by the mobility management function entity, so The second access node is a non-serving access node of the target terminal in the notification area where the serving access node is located; the processing unit is further configured to respond to the uplink non-access layer from the third access node NAS message, and send the location information of the target terminal to the local LMF through the sending unit, the third access node is the current serving access node of the target terminal, and the uplink NAS message carries the The location information of the target terminal; the receiving unit is further configured to receive a location determination response message from the local LMF, where the location determination response message carries the location information of the target terminal; the sending unit is configured to: The GMLC sends a location service response message, and the location service response message carries the location information of the target terminal.

In a ninth aspect, a communication device is provided, including: a processor, a memory, and a communication interface; the memory is used to store computer instructions; the processor is used to run the computer instructions to implement any of the The method described in one item.

In a tenth aspect, a communication device is provided, including: a processor, a memory, and a communication interface; the memory is used to store computer instructions; the processor is used to run the computer instructions to implement any of the computer instructions in the second aspect The method described in one item.

In an eleventh aspect, a communication device is provided, including: a processor, a memory, and a communication interface; the memory is used to store computer instructions; the processor is used to run the computer instructions to implement the Any one of the methods.

In a twelfth aspect, a communication device is provided, including: a processor, a memory, and a communication interface; the memory is used to store computer instructions; the processor is used to run the computer instructions to implement the fourth aspect Any one of the methods.

In a thirteenth aspect, a computer-readable storage medium is provided, the storage medium stores computer instructions, and the computer instructions implement the method according to any one of the first aspects when executed by a processor.

In a fourteenth aspect, a computer-readable storage medium is provided, and the storage medium stores computer instructions that, when executed by a processor, implement the method according to any one of the second aspects.

In a fifteenth aspect, a computer-readable storage medium is provided, and the storage medium stores computer instructions that, when executed by a processor, implement the method according to any one of the third aspects.

In a sixteenth aspect, a computer-readable storage medium is provided, and the storage medium stores computer instructions that, when executed by a processor, implement the method according to any one of the fourth aspects.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of a 5G communication system applicable to an embodiment of this application;

FIG. 2 is a schematic diagram of a location service network structure in a 5G network applicable to an embodiment of this application;

FIG. 3 is a signaling interaction diagram of a terminal positioning service method provided by an embodiment of this application;

FIG. 4 is a signaling interaction diagram of another terminal positioning service method provided by an embodiment of this application;

Figure 5 is a signaling interaction diagram of another terminal positioning service method provided by an embodiment of this application;

FIG. 6 is a signaling interaction diagram of another terminal positioning service method provided by an embodiment of this application;

FIG. 7 is a signaling interaction diagram of another terminal positioning service method provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of an access node device provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of another access node device provided by an embodiment of this application;

FIG. 10 is a schematic structural diagram of another access node device provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of a mobility management function entity device provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of a communication device provided by this application;

FIG. 13 is a schematic structural diagram of another communication device provided by the application;

FIG. 14 is a schematic structural diagram of another communication device provided by the application;

FIG. 15 is a schematic structural diagram of another communication device provided by the application.

detailed description

The specific implementation of the present application will be described in detail below in conjunction with the drawings. It should be understood that the specific implementations described here are only used to illustrate and explain the application, and are not used to limit the application.

It should be noted that “first”, “second”, and “third” in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence.

It should be understood that the technical solution of the present invention can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and broadband code division multiple access Address (Wideband Code Division Multiple Access, WCDMA) system, general packet radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, advanced long term evolution (Advanced long term evolution, LTE-A) System, Universal Mobile Telecommunication System (UMTS), New Radio (NR), etc.

It should also be understood that in this embodiment of the present invention, user equipment (User Equipment, UE) includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), and a mobile phone (handset). And portable equipment (portable equipment), etc., the user equipment can communicate with one or more core networks via a radio access network (RAN). For example, the user equipment can be a mobile phone (or “cellular”). Telephone), computer with wireless communication function, etc., user equipment can also be portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile device.

In the embodiment of the present invention, a base station (for example, an access point) may refer to a device that communicates with a wireless terminal through one or more sectors on an air interface in an access network. The base station can be used to convert received air frames and IP packets into each other, and act as a router between the wireless terminal and the rest of the access network, where the rest of the access network can include an Internet Protocol (IP) network. The base station can also coordinate the attribute management of the air interface. For example, the base station can be a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB) in TD-SCDMA or WCDMA, or an evolved base station (eNodeB or eNB or e-NodeB) in LTE. NodeB, evolutional Node B), or a base station (gNB) in 5G NR, the present invention is not limited.

Refer to Fig. 1, which is a schematic diagram of the structure of a 5G communication system to which the embodiments of this application are applicable. As shown in the figure, the 5G communication system is composed of 5G core network (5G Core, 5GC) network element 101 and radio access network (Next Generation Radio Access Network, NG-RAN) network element 102, 5GC network element 101 and NG-RAN The network element 102 is connected through the NG port.

Among them, the network elements that make up 5GC 101 include the access mobility management function (Access and Mobility Management Function, AMF) used to support control plane functions such as access and mobility management, and the core network positioning management function (Core Network) used to provide location services. Location Management Function, CN LMF) and User Plane Function (UPF) for supporting user plane functions (not shown in the figure).

The network elements constituting the NG-RAN include RAN nodes (102a-102c as shown in the figure). The RAN node includes gNB that provides wireless network user plane and control plane protocols and functions for 5G networks or ng-eNB that provides wireless network user plane and control plane protocols and functions for 4G network users. On the access network side, gNB and ng-eNB, gNB and gNB, and gNB and gNB are connected through Xn ports, that is, RAN nodes in the access network are connected through Xn ports. It should be noted that in the following description, the AMF entity is abbreviated as AMF, and the LMF entity is abbreviated as LMF.

In practical applications, the terminal establishes an RRC connection with the RAN node (gNB or ng-eNB) in the access network through the radio resource control (Radio Resource Control, RRC) protocol to realize the transmission of terminal radio access performance information and system information The acquisition of wireless resources, the acquisition of wireless resources, and mobility management.

In the 5G communication system, the RRC connection state of the terminal includes: RRC connected (RRC_CONNECTED) state, RRC idle (RRC_IDLE) state, and RRC inactive (RRC_INACTIVE) state. The RRC_CONNECTED state means that the terminal establishes an RRC connection with the RAN node, the RRC_IDLE state means that the terminal and the RAN node have not established an RRC connection, and the RRC_INACTIVE state means that the RRC connection between the terminal and the RAN node is not activated.

When the terminal is in the RRC_INACTIVE state, the terminal remains in the Connection Management-CONNECTED (CM-CONNECTED) state, and the terminal can perform RAN node handover in the RAN Notification Area (RNA) where the serving RAN node is located Instead of notifying AMF or mobility management entity (Mobility Management Entity, MME). When the terminal is in the RRC_INACTIV state, the last RAN node serving the terminal retains the context information of the terminal and the terminal's NG interface connection with AMF and UPF. From the perspective of the core network, the terminal in the RRC_INACTIV state is the same as in the RRC_CONNECTED state. When the terminal is in the RRC_INACTIVE state, if the last RAN node serving the terminal receives downlink data from UPF or downlink signaling from AMF, the RAN node will page the terminal in all cells in the RNA it belongs to. If the cell belongs to a neighboring gNB or ng-eNB, a paging request message (XnAP-RAN-Paging) is sent to the corresponding neighboring gNB or ng-eNB through the Xn port.

Take gNB 102a as an example. The terminal is in the RRC_INACTIVE state. When gNB 102a receives downlink data from UPF or downlink signaling from AMF, gNB 102a pages the terminal in all cells in the RNA to which it belongs. All the cells include the cells within the range of gNB 102a (the range shown by the dashed box of gNB 102a in Figure 1) and the notification range where gNB 102a is located (not marked in Figure 1) and belong to ng-eNB 102b, gNB 102d Specifically, the gNB 102a pages terminals within its jurisdiction on the one hand, and on the other hand sends a paging request message (XnAP-RAN-Paging) to RAN nodes such as ng-eNB 102b, gNB 102d, etc. through the Xn port; If the terminal currently resides in the gNB 102a, the gNB 102a re-establishes the RRC connection with the terminal in response to the downlink data from UPF or the downlink signaling from the AMF; if the terminal does not currently reside in the gNB 102a, the terminal in the RRC_INACTIVE state will cross over. When the node moves, gNB 102a sends a paging request message (XnAP-RAN-Paging) to RAN nodes such as ng-eNB 102b and ng-eNB 102c through the Xn port, so that the RAN node where the terminal resides can communicate with the terminal through the paging process. Establish an RRC connection to respond to downlink data from UPF or downlink signaling from AMF.

It should be noted that the above architecture is described using the 5G system architecture as an example. The embodiments of the present application may also be applicable to 5G evolution systems, or applicable to other communication systems (such as 4G communication systems), or applicable to the system architecture of the hybrid networking of 5G systems and other communication systems (such as 4G systems). List them again. For example, in a 4G communication system or a mixed networking system of a 4G communication system and a 5G communication system, MME can implement mobility management.

Based on the above system structure, the CN LMF in the core network provides location services for terminals in the RRC_CONNECTED state through the RAN node under the cooperation of core network elements such as AMF or MME.

In a possible implementation situation, the LMF that provides location services for the terminal in the RRC_CONNECTED state can be located in the core network, that is, CN LMF, or can be associated with the RAN node of the access network, that is, the local LMF (Local LMF, LLMF). ). Among them, the local LMF that provides location services for a terminal can be an LLMF associated with the terminal’s serving RAN node, or it can be an LLMF associated with the terminal’s non-serving RAN node. The non-serving RAN node and the serving RAN node are in Within the same RNA.

Refer to FIG. 2, which is a schematic diagram of a location service network structure in a 5G network to which an embodiment of this application is applicable. This figure exemplarily lists some network elements related to the embodiment of this application. Among them, LMF includes the core network LMF (LMF 205 in the figure), and also includes the local LMF set on the access network side. There is an association between a local LMF and a RAN node. For example, a local LMF can correspond to one or more RAN nodes. The local LMF can be co-located with the RAN node, so that the local LMF is associated with the RAN node co-located (the LLMF 208 is co-located with the RAN node 207 in the figure).

Based on the above system architecture, the terminal's location service process may include: the positioning client 201 initiates a location service request to the gateway location center (Gateway Mobile Location Center, GMLC) 202 through the Le port; the GMLC 202 communicates with the unified data management entity (Unified Data Management Entity) through the NLh port. Data Management (UDM) 203 interacts to obtain information related to the terminal 209 stored in UDM 203, and interacts with the Location Retrieval Function (LRF) 204 to obtain location service information related to the terminal 209; GMLC 202 uses the NLg port A location service request is initiated to the AMF 206; the AMF 206 selects the LMF that provides the location service for the terminal 209 according to the network configuration and related information of the terminal 209. If AMF selects CN LMF 205 to provide location services for terminal 209, it will initiate a location service request to CN LMF 205 through NLs. If AMF selects the LLMF 208 co-located with the RAN node (ie serving RAN node) 207 where the terminal 209 resides When the terminal 209 provides location services, it initiates a location service request to the LLMF 208 co-located with the RAN node 207 through the N2 port; CN LMF205 or LLMF 208 obtains the location information of the terminal 209 by interacting with the AMF 206, the RAN node 207 and the terminal 209, and through AMF 206 and GMLC 202 are finally sent to the positioning client 201. So far, the acquisition of terminal location information is completed.

Optionally, the aforementioned entity used for mobility management may be AMF or MME.

It should be noted that the English abbreviations such as NG, Xn, NLh, NLs, N2 in the above embodiments are used in the 5G network to support the communication of information transmission between equipment and equipment, equipment and network elements, and between network elements and network elements. Port, this embodiment of the application does not limit this.

Based on the foregoing architecture, in a possible implementation situation, the LMF that can provide location services for the terminal also includes an LLMF co-located with the non-serving RAN node of the terminal. In this case, related messages in the location service process need to be routed between the current serving RAN node of the terminal and the LMF that provides location services for the terminal. Considering that the interface between the 5G core network and the access network is the NG port, and the interface between the RAN nodes in the access network is the Xn port, this embodiment of the application provides a location service-related message routing based on the NG port or the Xn port method.

In the 5G network, LLMF is introduced on the RAN node side. Compared with CN LMF, the LLMF co-located with the RAN node can provide terminals with more accurate and lower latency location services. When the terminal moves across RAN nodes in the RAN notification area (RNA) where the original serving RAN node is located in the RRC_INACTIVE state, as for the core network side, the terminal moves within the notification area where the serving RAN node is located, so AMF stores The LLMF that provides location services for terminals will not change. When the LLMF performs the location service process for the terminal, the original serving RAN node of the terminal triggers the paging of the terminal within the RNA range, and the location service routing channel is established between the RAN node where the terminal currently resides and the LLMF that provides location services for the terminal , To ensure the transmission of location-related information.

In order to meet the high-precision and low-latency positioning service requirements under the 5G positioning service network structure, embodiments of the present application provide a terminal positioning service method, which can be used for terminals that move across RAN nodes within the same RNA and are in the RRC_INACTIVE state. In the scenario, the routing method is selected for the terminal's location service process.

Based on the system architecture shown in FIG. 2, in this embodiment of the present application, the target terminal can be positioned through interaction between multiple network devices.

For the convenience of description, the terminal that needs to be located is called the target terminal, the original serving access node of the target terminal is called the first access node, and the current serving access node of the target terminal is called the third access node. The ingress node and the third access node are located in the same RNA area, and the second access node is also included in the area.

In some possible implementation manners, the processing operation of the first access node may include:

Receive a location determination request message sent by the mobility management function entity, where the location determination request message is used to request to provide a location service for the target terminal. Wherein, the first access node is associated with a local LMF, and the local LMF is selected by the mobility management function entity to provide location services for the target terminal;

When the local LMF initiates the location service process of the target terminal and detects that the target terminal is in the RRC inactive state, it requests the access node in the notification area where the first access node is located to page the Target terminal

Receive location service routing indication information sent by a third access node, where the location service routing indication information is used to indicate a first routing mode or a second routing mode, and the first routing mode is the access node associated with the local LMF Message routing is performed with the third access node through the mobility management function entity, and the second routing manner is that the access node associated with the local LMF performs message routing with the third access node;

Receiving the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the mobility management function entity, and when the location service When the service routing indication information indicates the second routing mode, the first network device is the third access node;

Send a location determination response message to the mobility management function entity, where the location determination response message carries the location information of the target terminal.

Optionally, the location service routing indication information is carried in a context request message of the target terminal, and the context request message of the target terminal is sent after the third access node paging to the target terminal; In response to the context request message of the target terminal, the first access node sends a context response message of the target terminal to the third access node; the context response message of the target terminal carries context information of the target terminal And the location service information of the target terminal.

Optionally, before the first access node receives the location information of the target terminal sent by the first network device, the first access node sends the long-term information sent by the local LMF according to the location service routing instruction information. An evolved positioning protocol LLP transmission message is sent to the first network device, and the LLP transmission message carries the identifier of the target terminal and LLP information.

Optionally, if the location service routing indication information indicates the first routing mode, the first access node sends the LLP transmission message sent by the local LMF to the mobility management function entity, so that the mobility The management function entity sends a downlink non-access stratum NAS transmission message to the third access node to obtain the location information of the target terminal; wherein, the downlink NAS transmission message carries the identity of the target terminal and the LLP Information; if the location service routing indication information indicates the second routing mode, the first access node sends the LLP transmission message sent by the local LMF to the third access node to obtain the target terminal Location information.

In some other possible implementation manners, the processing operation of the second access node may include:

Receiving a determination location request message sent from a mobility management function entity, the determination location request message carrying information of a first access node, and the first access node information is the target stored by the mobility management function entity Serving access node information of the terminal; wherein the second access node is associated with a local LMF, and the local LMF is selected by the mobility management function entity to provide location services for the target terminal;

Sending an LLP transmission message to the first access node;

Receiving location service routing indication information sent by the first access node; wherein the location service routing indication information is determined by a third access node and sent to the first access node, and the location service routing indication information Is sent by the third access node after paging the target terminal in response to the paging request of the first access node;

Receiving the location information of the target terminal sent by the first network device;

Optionally, the second access node sends the LLP transmission message to the mobility management function entity, so that the mobility management function entity transfers the LLP according to the stored service access node information of the target terminal The transmission message is sent to the first access node.

Optionally, the second access node sends the LLP transmission message sent by the local LMF to the first network device according to the location service routing indication information.

Optionally, if the location service routing indication information indicates the first routing mode, the second access node sends the LLP transmission message sent by the local LMF to the mobility management function entity, so that the mobility The management function entity sends a downlink NAS transmission message to the third access node to obtain the location information of the target terminal; if the location service routing indication information indicates the second routing mode, the second access node Sending the LLP transmission message sent by the local LMF to the third access node to obtain the location information of the target terminal.

In some other possible implementation manners, the processing operation of the third access node may include:

After paging the target terminal in response to the paging request of the first access node, the location service routing indication information is determined for the target terminal, and the local LMF that provides the location service for the target terminal is the local associated with the first access node. LMF or local LMF associated with the second access node;

Sending the location information of the target terminal to the first network device according to the location service routing instruction information.

Optionally, the third access node sends a context request message of the target terminal to the first access node; the third access node receives that the first access node responds to the target terminal The context response message of the target terminal sent by the context request message.

Optionally, the third access node receives the location service information of the target terminal sent by the first access node; the third access node obtains the target according to the location service information of the target terminal Location information of the terminal.

Optionally, the location service routing indication information indicates the first routing mode; the third access node sends a path switch request message to the mobility management function entity, and the path switch request message carries a path for indicating the first route The location service routing indication information of the method; the third access node receives the path switching response message sent by the mobility management function entity.

Optionally, before the third access node sends the location information of the target terminal to the first network device, the third access node receives the LLP transmission message sent by the first network device.

In some other possible implementations, the processing operations of the mobility management function entity may include:

Receiving a location service request message from the GMLC, where the location service request message is used to request selection of an LMF for the target terminal;

Selecting a local LMF that provides location services for the target terminal, and sending a location determination request message to the local LMF, and the access node associated with the local LMF is the first access node or the second access node;

Responding to the uplink NAS message from the third access node, and sending the location information of the target terminal to the local LMF;

Receive a location determination response message from the local LMF, and send a location service response message to the GMLC.

Optionally, the mobility management function entity sends a downlink NAS message to the third access node in response to the LLP transmission message from the local LMF, and the LLP transmission message and the downlink NAS message carry the target The identification and LLP information of the terminal.

Optionally, the mobility management function entity receives a path switch request message from the third access node, and sends a path switch response message to the third access node.

Optionally, the local LMF is a local LMF associated with the second access node; the mobility management function entity receives an LLP transmission message sent by the local LMF in response to the determine location request message; the mobility management The functional entity sends the LLP transmission message to the first access node.

According to the foregoing one implementation manner or a combination of multiple implementation manners, FIGS. 3 to 7 exemplarily show several possible message interaction procedures.

Refer to Figure 3, which is a signaling interaction diagram of a terminal positioning service method provided by an embodiment of this application. In this embodiment, the target terminal (UE) moves from the first access node to the third within the same RNA range. Access node, and the third access node is in the RRC_INACTIVE state. In this case, the positioning client initiates the UE's location service request, and the AMF selects the second access node within the same RNA range as the first access node The co-located LLMF B provides location services for the UE, and routes related messages between the third access node (the access node where the UE currently resides) and the LLMF B during the location service process.

Among them, the access node can be a RAN node or a base station, etc., or other network elements that can implement network access functions. The mobility management function entity can be AMF or MME, or other network elements that can implement mobility management. In the following procedure, the access node is the RAN node and the mobility management function entity is the AMF as an example for description.

As shown in the figure, the signaling interaction process includes:

S301: The positioning client sends a positioning service request message to the GMLC, where the positioning service request message is used to request to obtain location information of the target UE.

Optionally, the location service request message carries the target UE identification and location QoS information.

Optionally, the location service request message may be an LCS Service Request message.

S302-S303: The GMLC sends a location service request message to the serving AMF of the target UE.

Wherein, the location service request message carries the identification of the target UE and the location QoS information of the target UE.

In this step. Before sending the positioning service request message, the GMLC obtains the AMF to which the target UE belongs (that is, the serving AMF of the target UE), so as to request it to provide positioning for the UE. If the GMLC does not locally store the address information of the AMF to which the target UE belongs, the GMLC can obtain the address information of the AMF to which the target terminal belongs from the UDM (see step 2). Optionally, in step 2, the GMLC sends a UE context request message carrying the identity of the target UE to the UDM, and receives a UE context response message returned by the UDM, which carries the address information of the AMF to which the target UE belongs. If the GMLC locally stores the address information of the AMF to which the target UE belongs, step 2 may not be performed.

Optionally, the location service request message sent by the GMLC to the AMF may be a Namf_Location_ProvideLocation Request message.

S304: After receiving the location service request message sent by the GMLC, the AMF selects the LMF for the target UE in response to the location service request message. Here, the AMF chooses to use the LLMF B co-located with the second RAN node to provide positioning services for the target UE.

Optionally, the AMF may be based on the original serving RAN node (first RAN node) information of the target UE, positioning QoS information, the positioning capability of the LMF in the area under the jurisdiction of the AMF, and the positioning type (such as instant positioning, delayed positioning, etc.), Select LMF for the target UE.

Specifically, the AMF is based on the location capabilities of the LMF (including at least the LLMF co-located with the second RAN node and the CN LMF in the core network) in the area under its jurisdiction, and the location QoS information of the target UE, and the AMF location. The stored information of the registered RAN node (here, the first RAN node) of the target UE, as well as the positioning type, etc., determine that the first RAN node does not have a co-located LLMF or the LLMF co-located with the first RAN node does not meet the positioning QoS requirements , And the LLMF B co-located with the second RAN node meets the positioning QoS requirements, so choose to use the LLMF B co-located with the second RAN node to provide location services for the target UE, where the second RAN node and the first RAN node In the same RNA.

Among them, the location capability of the LMF in the area under the jurisdiction of the AMF may be stored locally in the AMF, or may not be stored locally in the AMF. If it is not stored locally in the AMF, the AMF can query the location capability information of the LMF through the Network Repository Function (NRF).

It should be noted that because the target UE moved from the first RAN node to the third RAN node in the same RNA, the AMF did not update the UE's registered RAN node, that is, the registered RAN node of the target UE stored in the AMF is still the first RAN node. Information of a RAN node, and information such as the context of the UE are still stored in the first RAN node.

S305: The AMF sends a positioning request message to the second RAN node or the LLMF B co-located with the second RAN node according to the LLMF B selected for the target UE.

Wherein, the location determination request message carries the identity of the target UE, the identity of the original serving RAN node (first RAN node), and the location service information of the target UE. Optionally, the location service information includes at least a location session identifier and location QoS information. Optionally, the positioning service information further includes a positioning type.

Optionally, the positioning session identifier may be allocated by the AMF for the target UE, or may be allocated by the GMLC for the target UE. If the positioning session identifier is allocated by the GMLC to the target UE, the positioning session identifier may be carried in the positioning service request message sent in step 3.

In this step, AMF can be sent through the NLs interface between AMF and LLMF.

Optionally, the determination location request message sent by the AMF to the LLMF may be the Nlmf_Location_DetermineLocation Request message.

S306: After the LLMF B co-located with the second RAN node receives the confirm location request message, it sends a Long Term Evolution Positioning Protocol (LLP) transmission message to the first RAN node in response to the confirm location request message to obtain The positioning process of the target UE.

In this step, after the LLMF B co-located with the second RAN node receives the positioning request message, it starts to perform the positioning service provided for the target UE as a response, and then according to the original serving RAN node of the target UE sent by the AMF (the first RAN node). The node) identifier and the location service information of the target UE, send an LLP transmission message to the first RAN node through the NG port, in an attempt to obtain the location information of the target UE. The LLMF B can send an LLP transmission message to the first RAN node through the Xn port. Among them, the LLP transmission message can carry the target UE identifier, the LLMF B identifier, and the LLP information. The LLP information only allows the LLMF B and the target UE to read and write to obtain the location information of the target UE.

S307~S309: The first RAN node detects that the target UE is in RRC_INACTIVE, and requests other RAN nodes including the third RAN node to page the target UE, and then triggers the third RAN node to page the target UE within its jurisdiction After the target UE is paged, it sends an RRC reconnection request message to the third RAN node.

In this step, after receiving the LLP transmission message sent by LLMF B, the first RAN node attempts to deliver the LLP information to the target UE. Because the RRC connection between the target UE and the original serving RAN node (the first RAN node) is in In the inactive state, the first RAN node detects that the target UE is in RRC_INACTIVE and initiates a paging process in the RNA where the first RAN node is located, so as to restore or establish the RRC connection between the RAN node and the target UE, and then the LLP The information is delivered to the target UE to obtain the location information of the target UE. After receiving the paging request, the third RAN node pages the target UE within its jurisdiction in response to the paging request. After the target UE is paged, it sends an RRC Resume Request (RRC Resume Request) message to the third RAN node to request to restore or establish an RRC connection with the third RAN node. The paging process includes the first RAN node paging the target UE and the first RAN node sending a paging request (RAN Paging) to the RAN node in the RNA where the first RAN node is located, and the paging request carries the target. The UE identity and the LLMF B identity are used to request other RAN nodes to page the target UE. Wherein, the RNA where the first RAN node is located includes the third RAN node.

S310: After the third RAN node receives the RRC reconnection request message sent by the target UE. In response, the routing method used by the location service is selected for the target UE. Here, the third RAN node chooses to perform location service routing through AMF, that is, chooses to obtain messages in the target UE location service process through NG interface routing.

In this step, after receiving the RRC reconnection request message sent by the target UE, the third RAN node determines that the target UE is within its jurisdiction, and determines the need to cooperate with LLMF according to the reason for paging the target UE (location service) Provide positioning service for the target UE, so as to select the routing method adopted by the positioning service for the target UE. The routing methods used by location services can include:

The first routing method: routing via AMF, here is the message routing between the third RAN node and the second RAN node co-located by LLMF B via AMF;

Second routing method: Direct interaction between the third RAN node and the second RAN node co-located by LLMF B, here is the message exchanged between the third RAN node and LLMF B through the third RAN node co-located with LLMF B Xn port routing between the second RAN nodes.

Optionally, in the embodiment of the present application, the routing method used by the location service can be selected according to the strategy configured by the system, or the routing method adopted by the location service can be selected according to the predefined configuration of the system or the agreement of the system.

S311-S312: The third RAN node sends a UE context request message to the first RAN node, where the UE context request message carries location service routing indication information, and receives a UE context response message sent by the first RAN node.

Specifically, in response to the received RRC reconnection request message, the third RAN node sends a UE context request message to the original serving node of the target UE (the first RAN node), and the UE context request message carries the UE identity to request to obtain the UE. The context information includes configuration information used to establish a communication link with the UE, such as authentication information, bearer information, etc. The UE context request message also carries location service routing indication information to indicate the routing of the location service the way. Here, the routing indication information is used to indicate the first routing method (ie, NG port routing is used). After receiving the UE context request message, the first RAN node sends a UE context response message to the third RAN node, where the UE context response message carries context information of the UE.

S313: After receiving the UE context response message, the third RAN node performs signaling interaction with the target UE to restore or establish an RRC connection.

Specifically, after receiving the UE context response message, the third RAN node performs signaling interaction with the target UE according to the context information of the UE to complete the recovery or establishment of the RRC connection.

So far, the UE resumes or establishes the RRC connection with the third RAN node, and the UE enters the RRC_CONNECTED state from the RRC_INACTIVE state.

S314-S315: The third RAN node sends a path switch request message to the AMF, and receives a path switch response message sent by the AMF.

Wherein, the path switching request message carries the target UE identification and location service routing indication information.

In this step, since the location service routing mode selected by the third RAN node for the target UE in S310 is the first routing mode, that is, the message about the location service of the target UE needs to be forwarded through the AMF, and the AMF has the option of selecting the third RAN node The third RAN node sends a path switch request message to the AMF to obtain the understanding of the AMF. After the AMF receives the path switch request message, it responds. Authorize the first routing method adopted by the target UE location service, and update the stored service RAN node information of the target UE and the target UE location service routing method as the first routing method, and then send a path switching response to the third RAN node news.

Optionally, the path switch request message sent by the third RAN node is a Path Switch Request message.

Optionally, the path switch response message sent by the AMF is a Path Switch Response message.

S316: The first RAN node sends a redirect message to the second RAN node, where the redirect message carries location service routing indication information.

Optionally, the redirect message carries the third RAN node identifier.

In this step, the third RAN node learns that the routing mode of the location service provided for the target UE is the first routing mode, and sends a redirect message to the second RAN node co-located with LLMF B that provides the location service for the target UE. The LLMF B co-located with the second RAN node re-executes the location service process for the target UE according to the routing mode of the target UE location service.

Optionally, the redirected LLP transport message sent by the first RAN node is a Reroute LLP Transport message.

S317-S322: Perform a location service process, where the location service related messages between the LLMF B and the current serving RAN node (third RAN node) of the target UE are routed through the AMF, that is, the first routing method is adopted.

In S317, after receiving the redirection message, the second RAN node sends an LLP transmission message to the AMF through the NG port in response to the redirection message. The LLP transmission message carries the target UE identity and LLP information. Specifically, after receiving the redirection message, the second RAN node determines that the RAN node where the target UE resides is the third RAN node and the routing method adopted by the target UE location service is NG interface routing, so it responds to the redirection The message triggers the LLMF B co-located with the second RAN node to re-execute the location service process for the target UE, and then the second RAN node sends an LLP transmission message to the AMF through the NG interface to obtain the location information of the target UE. Optionally, the LLP transmission message sent by the second RAN node through the NG interface is a Location infor message.

In S318, after the AMF receives the LLP transmission message, in response to the LLP transmission message, it sends a downlink non-access stratum (NAS) transmission message to the third RAN node through the NG port. The downlink NAS transmission message carries Target UE identification and LLP information. Specifically, after the AMF receives the LLP transmission message sent by the second RAN node, in response to the LLP transmission message, according to the RAN node information (third RAN node) registered by the target UE, the RAN node ( The third RAN node) sends a downlink NAS transmission message to obtain the location information of the target UE. Optionally, the downlink NAS transmission message sent by the AMF through the NG port is a DOWNLINK NAS TRANSPORT message.

In S319, after receiving the downlink NAS transmission message, the third RAN node sends a downlink RRC message to the target UE in response to the downlink NAS transmission message, and the downlink RRC message carries LLP information. Specifically, after receiving the downlink NAS transmission message sent by the AMF, the third RAN node sends a downlink RRC message to the target UE according to the identifier of the target UE in response to the downlink NAS transmission message to obtain the location information of the target UE. Optionally, the downlink RRC message sent by the third RAN node is a DLinformationtransfer message.

In S320, after receiving the downlink RRC message, the target UE sends an uplink RRC message to the third RAN node in response to the downlink RRC message, and the uplink RRC message carries LLP information. Specifically, after receiving the downlink RRC message sent by the third RAN node, the target UE parses the LLP information carried in the downlink RRC message in response to the downlink RRC message, writes the location information into the LLP information, and writes the post-LLP information It is carried in an uplink RRC message and sent to the third RAN node. Optionally, the uplink RRC message sent by the target UE is a Ulinformationtransfer message.

In S321, after receiving the uplink RRC message, the third RAN node sends an uplink NAS transmission message to the AMF through the NG port in response to the uplink RRC message, and the uplink NAS transmission message carries LLP information. Specifically, since the routing method used by the target UE location service is NG interface routing, after receiving the uplink RRC message sent by the target UE, the third RAN node responds to the uplink RRC message and carries the LLP information in the uplink NAS transmission message It is sent to AMF through NG port. Optionally, the uplink NAS transmission message sent by the third RAN node through the NG interface is an UPLINK NAS TRANSPORT message.

In S322, after receiving the uplink NAS transmission message, the AMF sends an LLP transmission message to the second RAN node through the NG port in response to the uplink NAS transmission message, and the LLP transmission message carries LLP information. Specifically, since the LMF providing location services for the target UE is an LLMF B co-located with the second RAN node, after the AMF receives the uplink RRC message sent by the third RAN node through the NG interface, in response to the uplink RRC message, The LLP information is carried in the LLP transmission message and sent to the LLMF B co-located with the second RAN node through the NG port. Optionally, the LLP transmission message sent by the AMF through the NG port is a Lcation infor message.

It should be noted that the above S317-S322 exemplarily show the process of the LMF providing location services for the terminal. In actual use, S317-S322 will be repeated multiple times in order to successfully obtain the location information of the terminal.

So far, the LLMF B co-located with the second RAN node successfully obtains the location information of the target UE, and the LLMF B uses the NG interface routing to provide location services for the target UE.

S323: After the LLMF B co-located with the second RAN node obtains the location information of the target UE, it sends a location determination response message to the AMF. The location determination response message carries the location information of the UE.

In this step, after the second RAN node receives the LLP transmission message sent by the AMF, in response, it triggers the LLMF co-located with the second RAN node to parse the LLP information carried in the LLP transmission message to obtain the location information of the target UE. The location information of the target UE is carried in the positioning determination response message and sent to the AMF.

Optionally, the location determination response message sent by the LLMF may be a Nlmf_Location_DetermineLocation Response message.

S324: After receiving the confirm location response message, the AMF sends a location service response message to the GMLC. The location service response message carries the location information of the UE.

Optionally, the location service response message sent by the AMF may be a Namf_Location_ProvideLocation Response message.

S325: After receiving the location service response message, the GMLC sends a location service response message to the location client, where the location service response message carries the location information of the UE.

Optionally, the location service response message sent by the GMLC may be an LCS Service Response message.

So far, the positioning client completes the acquisition of the location information of the target UE.

It should be noted that in the above embodiment, the LLMF B co-located with the second RAN node can send LLP transmission directly to the first RAN node through the Xn port in response to the received confirmation location request message. Message to obtain the location information of the target UE; it is also possible to use the NG port to send an LLP transmission message to the first RAN node via the AMF to obtain the location information of the target UE. The interface used by LLMF B to send the determination location request message to the first RAN node may be determined by LLMF B itself, or may be determined by AMF and notified to LLMF B, etc., which is not limited in this application.

It should be noted that S301 is an optional step. That is, the positioning service request for the target UE can be initiated by the positioning client or the network side can actively initiate. For example, the GMLC needs to obtain the location information of the target UE based on the strategy or configuration of the network side, and then actively initiates a location service request for the target UE. This application does not limit this. It should also be noted that the signaling interaction sequence in the signaling interaction diagram is only an example, and does not strictly represent the sequence of signaling interaction in actual applications. For example, in the above process, after the UE’s current serving RAN node determines the routing method used by the location service, it can reuse the UE context request message to send the routing location service indication information to the original serving RAN node of the UE, so that the UE’s The original serving RAN node sends the location service routing indication information to the LMF that provides the location service for the UE. Among them, the UE’s current serving RAN node can also send routing and positioning service indication information to the UE’s original serving RAN node through other messages (such as newly defined messages), and the UE’s original serving RAN node can also send location services through other messages. The routing indication information is sent to the LMF that provides location services for the UE. In addition, the original RAN node of the UE may send location service routing indication information to the LMF that provides location services for the UE before S314 or S315.

It should also be noted that the message naming in the signaling interaction diagram is only an example, and other naming methods may be used for naming, which is not limited in this application.

Based on the signaling interaction diagram shown in Figure 3, in an achievable manner, the first RAN node sends the location service information of the target UE to the third RAN node, and the third RAN node resumes or establishes RRC with the target UE. After the connection, the third RAN node can be triggered to send a downlink RRC message to the target UE, as shown in Fig. 4.

Refer to FIG. 4, which is a signaling interaction diagram of a terminal positioning service method provided by an embodiment of this application.

As shown in the figure, the signaling interaction process includes:

S401: The positioning client sends a positioning service request message to the GMLC, where the positioning service request message is used to request to obtain location information of the target UE.

S402~S403: The GMLC sends a location service request message to the serving AMF of the target UE.

S404: After receiving the location service request message sent by the GMLC, the AMF selects the LMF for the target UE in response to the location service request message. Here, the AMF chooses to use the LLMF B co-located with the second RAN node to provide positioning services for the target UE.

S405: The AMF sends a location determination request message to the second RAN node or the LLMF B co-located with the second RAN node according to the LLMF B selected for the target UE.

S406: After the LLMF B co-located with the second RAN node receives the location determination request message, it sends an LLP transmission message to the first RAN node in response to the location determination request message to obtain the location process of the target UE.

S407~S409: The first RAN node detects that the target UE is in RRC_INACTIVE, and requests other RAN nodes including the third RAN node to page the target UE, and then triggers the third RAN node to page the target UE within its jurisdiction After the target UE is paged, it sends an RRC reconnection request message to the third RAN node.

S410: After the third RAN node receives the RRC reconnection request message sent by the target UE. In response, the routing method used by the location service is selected for the target UE. Here, the third RAN node chooses to perform location service routing through AMF, that is, chooses to obtain messages in the target UE location service process through NG interface routing.

The specific implementation manners involved in S401 to S410 above are consistent with the specific implementation manners involved in S301 to S310 in FIG. 3, and will not be repeated here.

S411-S412: The third RAN node sends a UE context request message to the first RAN node, where the UE context request message carries location service routing indication information, and receives a UE context response message sent by the first RAN node, where the UE context response message carries Location service information of the target UE.

Specifically, in response to the received RRC reconnection request message, the third RAN node sends a UE context request message to the original serving node of the target UE (the first RAN node), and the UE context request message carries the UE identity to request to obtain the UE. The context information includes configuration information used to establish a communication link with the UE, such as authentication information, bearer information, etc. The UE context request message also carries location service routing indication information to indicate the routing of the location service the way. Here, the routing indication information is used to indicate the first routing method (ie, NG port routing is used). After receiving the UE context request message, the first RAN node sends a UE context response message to the third RAN node, where the UE context response message carries the context information of the UE and the location service information of the target UE.

S413: After receiving the UE context response message, the third RAN node performs signaling interaction with the target UE to restore or establish an RRC connection.

S414-S415: The third RAN node sends a path switch request message to the AMF, and receives a path switch response message sent by the AMF.

The specific implementation manners involved in S414 to S415 above are consistent with the specific implementation manners involved in S314 to S315 in FIG. 3, and details are not described herein again.

S416-S419: Perform a location service process, where the location service related messages between the current serving RAN node (third RAN node) of the target UE and the LLMF B are routed through the AMF, that is, the first routing method is adopted.

In S416, the third RAN node sends a downlink RRC message to the target UE, and the downlink RRC message carries LLP information. Specifically, after the current serving RAN node of the target UE (the third RAN node) restores or establishes an RRC connection with the target UE and the selected first routing method is understood by AMF, it triggers the third RAN node to respond to the execution of LLMF B According to the positioning service process of the UE context response message, a downlink RRC message is sent to the target UE according to the positioning service information carried in the UE context response message to obtain the location information of the target UE. Optionally, the downlink RRC message sent by the third RAN node is a DLinformationtransfer message.

In S417, after receiving the downlink RRC message, the target UE sends an uplink RRC message to the third RAN node in response to the downlink RRC message, and the uplink RRC message carries LLP information. Specifically, after receiving the downlink RRC message sent by the third RAN node, the target UE parses the LLP information carried in the downlink RRC message in response to the downlink RRC message, writes the location information into the LLP information, and writes the post-LLP information It is carried in an uplink RRC message and sent to the third RAN node. Optionally, the uplink RRC message sent by the target UE is a Ulinformationtransfer message.

In S418, after receiving the uplink RRC message, the third RAN node sends an uplink NAS transmission message to the AMF through the NG port in response to the uplink RRC message, and the uplink NAS transmission message carries LLP information. Specifically, since the routing method used by the target UE location service is NG interface routing, after receiving the uplink RRC message sent by the target UE, the third RAN node responds to the uplink RRC message and carries the LLP information in the uplink NAS transmission message It is sent to AMF through NG port. Optionally, the uplink NAS transmission message sent by the third RAN node through the NG interface is an UPLINK NAS TRANSPORT message.

In S419, after receiving the uplink NAS transmission message, the AMF sends an LLP transmission message to the second RAN node through the NG port in response to the uplink NAS transmission message, and the LLP transmission message carries LLP information. Specifically, since the LMF that provides positioning services for the target UE is an LLMF B co-located with the second RAN node, the AMF node responds to the uplink RRC message after receiving the uplink RRC message sent by the third RAN node through the NG interface, The LLP information is carried in the LLP transmission message and sent to the AMF through the NG port. Optionally, the LLP transmission message sent by the AMF through the NG port is a Lcation infor message.

It should be noted that the foregoing S416 to S419 exemplarily show the process of the LMF providing location services for the terminal. In actual applications, S317 to S322 will be repeated multiple times in order to successfully obtain the location information of the terminal.

S420: After the LLMF co-located with the second RAN node obtains the location information of the target UE, it sends a location determination response message to the AMF, where the location determination response message carries the location information of the UE.

S421: After receiving the determining location response message, the AMF sends a location service response message to the GMLC, where the location service response message carries the location information of the UE.

S422: After receiving the location service response message, the GMLC sends a location service response message to the location client, where the location service response message carries the location information of the UE.

The specific implementation manners involved in S420 to S422 above are consistent with the specific implementation manners involved in S323 to S325 in FIG. 3, and details are not described herein again.

It should be noted that, in the above-mentioned embodiment, the LLMF B co-located with the second RAN node can send LLP transmission directly to the first RAN node through the Xn port in response to the received confirmation location request message. Message to obtain the location information of the target UE; it is also possible to use the NG port to send an LLP transmission message to the first RAN node via the AMF to obtain the location information of the target UE. The interface used by LLMF B to send the determination location request message to the first RAN node may be determined by LLMF B itself, or may be determined by AMF and notified to LLMF B, etc., which is not limited in this application.

It should be noted that S401 is an optional step. That is, the positioning service request for the target UE can be initiated by the positioning client or the network side can actively initiate. For example, the GMLC needs to obtain the location information of the target UE based on the strategy or configuration of the network side, and then actively initiates a location service request for the target UE. This application does not limit this.

It should also be noted that the signaling interaction sequence in the signaling interaction diagram is only an example, and does not strictly represent the sequence of signaling interaction in actual applications.

Based on the signaling interaction diagram shown in Figure 3, in an achievable way, the positioning client initiates the UE's positioning service request, and the AMF selects the second RAN co-located in the same RNA range as the first RAN node The set LLMF B provides location services for the UE, and the messages exchanged between the third RAN node and LLMF B are routed through the Xn interface between the third RAN node and the second RAN node co-located by LLMF B, which can be specifically as follows Shown in Figure 5.

Refer to FIG. 5, which is a signaling interaction diagram of a terminal positioning service method provided by an embodiment of this application. As shown in the figure, the signaling interaction process includes:

S501: The positioning client sends a positioning service request message to the GMLC, where the positioning service request message is used to request to obtain the location information of the target UE.

S502-S503: The GMLC sends a location service request message to the serving AMF of the target UE.

S504: After receiving the location service request message sent by the GMLC, the AMF selects the LMF for the target UE in response to the location service request message. Here, the AMF chooses to use the LLMF B co-located with the second RAN node to provide positioning services for the target UE.

S505: The AMF sends a positioning request message to the second RAN node or the LLMF B co-located with the second RAN node according to the LLMF B selected for the target UE.

S506: After the LLMF B co-located with the second RAN node receives the location determination request message, it sends an LLP transmission message to the first RAN node in response to the location determination request message to obtain the location process of the target UE.

S507~S509: The first RAN node detects that the target UE is in RRC_INACTIVE, and requests other RAN nodes including the third RAN node to page the target UE, and then triggers the third RAN node to page the target UE within its jurisdiction After the target UE is paged, it sends an RRC reconnection request message to the third RAN node.

The specific implementations involved in S501 to S509 above are the same as the specific implementations involved in S301 to S309 in FIG. 3, and will not be repeated here.

S510: After the third RAN node receives the RRC reconnection request message sent by the target UE. In response, the routing method used by the location service is selected for the target UE. Here, the third RAN node chooses to perform the location service routing through the second RAN node, that is, chooses to obtain the message in the target UE location service process through the Xn interface routing.

S511-S512: The third RAN node sends a UE context request message to the first RAN node, where the UE context request message carries location service routing indication information, and receives a UE context response message sent by the first RAN node. The location service routing indication information is used to indicate the second routing mode (ie, Xn port routing is used), and the UE context response message carries context information of the UE.

S513: After receiving the UE context response message, the third RAN node performs signaling interaction with the target UE to recover or establish an RRC connection.

The specific implementations involved in S511 to S513 above are consistent with the specific implementations involved in S311 to S313 in FIG. 3, and will not be repeated here.

S514: The first RAN node sends a redirection message to the second RAN node, where the redirection message carries the third RAN node identifier and routing indication information.

Specifically, in this step, after the first RAN node learns that the RAN node where the target UE currently resides is the third RAN node and obtains routing indication information, it determines that the routing mode indicated by the routing indication information is the second routing mode, then Send a redirection message to the second RAN node co-located with LLMF B that provides location services for the target UE, so that the LLMF B co-located with the second RAN node will be based on the identity of the third RAN node where the target UE resides and the target The routing method of the UE location service is to re-execute the location service process for the target UE.

S515~S518: Perform the location service process, where the location service related messages between LLMF B and the current serving RAN node of the target UE (third RAN node) are directly routed through the second RAN node co-located with LLMF B, that is, the first Two routing methods.

In S515, after receiving the redirection message, the second RAN node sends an LLP transmission message to the third RAN node through the Xn port in response to the redirection message, and the LLP transmission message carries the target UE identity and LLP information. Specifically, after receiving the redirection message, the second RAN node determines that the RAN node where the target UE resides is the third RAN node and the routing method adopted by the target UE location service is Xn port routing, so it responds to the redirection Message, triggers the LLMF B co-located with the second RAN node to re-execute the positioning service process for the target UE, and then the second RAN node sends an LLP transmission message to the third RAN node where the target UE currently resides through the Xn port to obtain the target UE Location information. Optionally, the LLP transmission message sent by the second RAN node through the Xn port is an Xn LLP TRANSPORT message.

In S516, after receiving the LLP transmission message, the third RAN node sends a downlink RRC message to the target UE in response to the LLP transmission message, and the downlink RRC message carries LLP information. Specifically, after receiving the LLP transmission message sent by the second RAN node, the third RAN node sends a downlink RRC message to the target UE according to the identifier of the target UE in response to the LLP transmission message to obtain the location information of the target UE. Optionally, the downlink RRC message sent by the third RAN node is a DLinformationtransfer message.

In S517, after receiving the downlink RRC message, the target UE sends an uplink RRC message to the third RAN node in response to the downlink RRC message, and the uplink RRC message carries LLP information. Specifically, after receiving the downlink RRC message sent by the third RAN node, the target UE parses the LLP information carried in the downlink RRC message in response to the downlink RRC message, writes the location information into the LLP information, and writes the post-LLP information It is carried in an uplink RRC message and sent to the third RAN node. Optionally, the uplink RRC message sent by the target UE is a Ulinformationtransfer message.

In S518, after receiving the uplink RRC message, the third RAN node transmits the message to the second RAN node LLP through the Xn port in response to the uplink RRC message, and the LLP transmission message carries the LLP information. Specifically, since the routing method adopted by the target UE location service is Xn port routing, after receiving the uplink RRC message sent by the target UE, the third RAN node responds to the uplink RRC message and carries the LLP information in the LLP transmission message It is sent through the Xn port to the second RAN node that is co-located with the LLMF and B for the target UE's location service. Optionally, the uplink NAS transmission message sent by the third RAN node through the Xn port is an Xn LLP TRANSPORT message.

It should be noted that the above S515-S518 exemplarily show the process of the LMF providing location services for the terminal. In actual applications, S515-S518 will be repeated multiple times in order to successfully obtain the location information of the terminal.

So far, the LLMF B co-located with the second RAN node successfully obtains the location information of the target UE, and the process of LLMF B using Xn port routing to provide location services for the target UE ends.

S519: After the LLMF co-located with the second RAN node obtains the location information of the target UE, it sends a location determination response message to the AMF, where the location determination response message carries the location information of the UE.

S520: After receiving the confirm location response message, the AMF sends a location service response message to the GMLC, where the location service response message carries the location information of the UE.

S521: After receiving the location service response message, the GMLC sends a location service response message to the location client, where the location service response message carries the location information of the UE.

The specific implementations involved in S519 to S521 above are the same as the specific implementations involved in S323 to S325 in FIG. 3, and will not be repeated here.

It should be noted that, in the above embodiment, the LLMF B co-located with the second RAN node can send LLP transmission directly to the first RAN node through the Xn port in response to the received confirmation location request message. Message to obtain the location information of the target UE; it is also possible to use the NG port to send an LLP transmission message to the first RAN node via the AMF to obtain the location information of the target UE. The interface used by LLMF B to send the determination location request message to the first RAN node may be determined by LLMF B itself, or may be determined by AMF and notified to LLMF B, etc., which is not limited in this application.

It should be noted that S501 is an optional step. That is, the positioning service request for the target UE can be initiated by the positioning client or the network side can actively initiate. For example, the GMLC needs to obtain the location information of the target UE based on the strategy or configuration of the network side, and then actively initiates a location service request for the target UE. This application does not limit this.

Based on the signaling interaction diagrams shown in Figure 5 and Figure 4, in an achievable manner, the context response message sent by the first RAN node to the third RAN node in S512 carries the location service information of the target UE, which can trigger The third RAN node continues to perform the location service initiated by LLMF B, and after restoring or establishing an RRC connection with the target UE, the third RAN node sends a downlink RRC message to the target UE according to the location service information of the target UE to obtain The location information of the target UE. The third RAN node carries the location information returned by the target UE in response to the downlink RRC message in the LLP transmission message and sends it to the second RAN node through the Xn port, so that the LLMF co-located with the second RAN node B obtains the location information of the target UE, and completes the positioning service process of the target UE.

Refer to Figure 6, which is a signaling interaction diagram of a terminal positioning service method provided by an embodiment of this application. In this embodiment, the target terminal (UE) moves from the first access node to the third within the same RNA range. Access node, and the third access node is in the RRC_INACTIVE state. In this case, the positioning client initiates a positioning service request for the UE, and the AMF selects the LLMF set co-located with the first access node to provide positioning for the UE Service, and route related messages between the third access node (the access node where the UE currently resides) and the LLMF A in the location service process via AMF.

Wherein, the access node may be a RAN node or a base station, etc., or other network elements capable of implementing network access functions. The mobility management function entity can be AMF or MME, or other network elements that can implement mobility management. In the following procedure, the access node is the RAN node and the mobility management function entity is the AMF as an example for description.

As shown in the figure, the signaling interaction process includes:

S601: The positioning client sends a positioning service request message to the GMLC, where the positioning service request message is used to request to obtain the location information of the target UE.

S602-S603: The GMLC sends a location service request message to the serving AMF of the target UE.

The specific implementations involved in S601 to S603 above are the same as the specific implementations involved in S301 to S303 in FIG. 3, and will not be repeated here.

S604: After receiving the location service request message sent by the GMLC, the AMF selects the LMF for the target UE in response to the location service request message. Here, the AMF chooses to use the LLMF A co-located with the first RAN node to provide positioning services for the target UE.

Specifically, the AMF is based on the positioning capabilities of the LMF (which may include the CN LMF in the core network) within its jurisdiction, the positioning QoS information of the target UE, and the registered RAN node of the target UE stored by the AMF (here, the first It is determined that the LLMF co-located with the first RAN node meets the positioning QoS requirements, so it is selected to use the LLMF A co-located with the first RAN node to provide positioning services for the target UE.

S605: The AMF sends a positioning request message to the first RAN node or the LLMF A co-located with the first RAN node according to the LLMF A selected for the target UE.

Wherein, the positioning request message carries the identification of the target UE and the positioning service information of the target UE. Optionally, the location service information includes at least a location session identifier and location QoS information. Optionally, the positioning service information further includes a positioning type.

S606~S608: The first RAN node detects that the target UE is in RRC_INACTIVE, and requests other RAN nodes including the third RAN node to page the target UE, and then triggers the third RAN node to page the target UE within its jurisdiction After the target UE is paged, it sends an RRC reconnection request message to the third RAN node.

In this step, after the LLMF A co-located with the first RAN node receives the confirm location request message sent by the AMF, in response to the confirm location request message, it executes the location service procedure of the target UE, and then triggers the first RAN node to detect The target UE is in RRC_INACTIVE, so the first RAN node initiates a paging process in the RNA where the first RAN node is located, so as to restore or establish an RRC connection between the RAN node and the target UE, and then obtain the location information of the target UE. After receiving the paging request, the third RAN node pages the target UE within its jurisdiction in response to the paging request. After the target UE is paged, it sends an RRC Resume Request (RRC Resume Request) message to the third RAN node to request to restore or establish an RRC connection with the third RAN node. The paging process includes the first RAN node paging the target UE and the first RAN node sending a paging request (RAN Paging) to the RAN node in the RNA where the first RAN node is located, and the paging request carries the target. The UE ID and the LLMF A ID are used to request other RAN nodes to page the target UE. Wherein, the RNA where the first RAN node is located includes the third RAN node.

S609: After the third RAN node receives the RRC reconnection request message sent by the target UE. In response, the routing method used by the location service is selected for the target UE. Here, the third RAN node chooses to perform location service routing through AMF, that is, chooses to obtain messages in the target UE location service process through NG interface routing.

S610-S611: The third RAN node sends a UE context request message to the first RAN node, where the UE context request message carries location service routing indication information, and receives a UE context response message sent by the first RAN node. The location service routing indication information is used to indicate the first routing mode (ie, NG port routing is used), and the UE context response message carries context information of the UE.

S612: After receiving the UE context response message, the third RAN node performs signaling interaction with the target UE to restore or establish an RRC connection.

S613-S614: The third RAN node sends a path switch request message to the AMF, and receives a path switch response message sent by the AMF. Wherein, the path switching request message carries the target UE identification and location service routing indication information.

The specific implementation manners involved in S609 to S614 above are consistent with the specific implementation manners involved in S310 to S315 in FIG. 3, and details are not described herein again.

S615-S620: Perform a location service process, where the location service related messages between the LLMF A and the current serving RAN node (third RAN node) of the target UE are routed through the AMF, that is, the first routing method is adopted.

In S615, the first RAN node sends an LLP transmission message to the AMF through the NG interface, and the LLP transmission message carries the target UE identity and LLP information. Specifically, after LLMF A co-located with the first RAN node determines that the RAN node where the target UE resides is the third RAN node, it responds to the NG interface routing mode sent by the third RAN node and triggers the LLMF A to be the target UE. The positioning service process is executed, and then the first RAN node sends an LLP transmission message to the AMF through the NG port to obtain the location information of the target UE. Optionally, the LLP transmission message sent by the first RAN node through the NG interface is a Location infor message.

The specific implementation manners involved in S616 to S620 are consistent with the specific implementation manners involved in S318 to S322 in FIG. 3, and details are not described herein again.

It should be noted that the foregoing S615 to S620 exemplarily show the process of the LMF providing location services for the terminal. In actual applications, S615 to S620 will be repeated multiple times in order to successfully obtain the location information of the terminal.

So far, the LLMF A co-located with the first RAN node successfully obtains the location information of the target UE, and the LLMF A uses the NG interface routing to provide location services for the target UE.

S622: After the LLMF A co-located with the first RAN node obtains the location information of the target UE, it sends a location determination response message to the AMF, where the location determination response message carries the location information of the UE.

S623: After receiving the confirm location response message, the AMF sends a location service response message to the GMLC, where the location service response message carries the location information of the UE.

S624: After receiving the location service response message, the GMLC sends a location service response message to the location client, where the location service response message carries the location information of the UE.

The specific implementation manners involved in S622 to S624 above are consistent with the specific implementation manners involved in S323 to S325 in FIG. 3, and will not be repeated here.

It should be noted that S601 is an optional step. That is, the positioning service request for the target UE can be initiated by the positioning client or the network side can actively initiate. For example, the GMLC needs to obtain the location information of the target UE based on the strategy or configuration of the network side, and then actively initiates a location service request for the target UE. This application does not limit this.

It should be noted that the signaling interaction sequence in the signaling interaction diagram is only an example, and does not strictly represent the sequence of signaling interaction in actual applications.

Based on the signaling interaction diagrams shown in Figure 6 and Figure 4, in an achievable manner, the context response message sent by the first RAN node to the third RAN node in S611 carries the location service information of the target UE, which can trigger The third RAN node continues to perform the location service initiated by LLMF A, and after restoring or establishing an RRC connection with the target UE, the third RAN node sends a downlink RRC message to the target UE according to the location service information of the target UE to obtain The location information of the target UE. The third RAN node carries the location information returned by the target UE in response to the downlink RRC message in the LLP transmission message and sends it to the first RAN node via the AMF so that the LLMF co-located with the first RAN node Obtain the location information of the target UE, and complete the positioning service process of the target UE.

Based on the signaling interaction diagram shown in Figure 6, in an achievable way, the positioning client initiates a positioning service request for the UE, and the AMF selects the LLMF A co-located with the first RAN node to provide positioning services for the UE , And the messages exchanged between the third RAN node and the LLMF A are routed through the Xn interface between the third RAN node and the first RAN node co-located with the LLMF A, as shown in FIG. 7 specifically.

Refer to FIG. 7, which is a signaling interaction diagram of a terminal positioning service method provided by an embodiment of this application.

As shown in the figure, the signaling interaction process includes:

S701: The positioning client sends a positioning service request message to the GMLC, where the positioning service request message is used to request to obtain the location information of the target UE.

S702~S703: The GMLC sends a location service request message to the serving AMF of the target UE.

S704: After receiving the location service request message sent by the GMLC, the AMF selects an LMF for the target UE in response to the location service request message. Here, the AMF chooses to use the LLMF A co-located with the first RAN node to provide positioning services for the target UE.

S705: The AMF sends a location determination request message to the first RAN node or the LLMF A co-located with the first RAN node according to the LLMF A selected for the target UE.

S706~S708: The first RAN node detects that the target UE is in RRC_INACTIVE, and requests other RAN nodes including the third RAN node to page the target UE, and then triggers the third RAN node to page the target UE within its jurisdiction After the target UE is paged, it sends an RRC reconnection request message to the third RAN node.

The specific implementation manners involved in S701 to S708 above are consistent with the specific implementation manners involved in S601 to S608 in FIG. 6, and details are not described herein again.

S709: After the third RAN node receives the RRC reconnection request message sent by the target UE. In response, the routing method used by the location service is selected for the target UE. Here, the third RAN node selects the location service route with the first RAN node, that is, selects to obtain the message in the target UE location service process through the Xn interface route.

S710-S711: The third RAN node sends a UE context request message to the first RAN node, where the UE context request message carries location service routing indication information, and receives a UE context response message sent by the first RAN node. The location service routing indication information is used to indicate the first routing mode (ie, NG port routing is used), and the UE context response message carries context information of the UE.

S712: After receiving the UE context response message, the third RAN node performs signaling interaction with the target UE to restore or establish an RRC connection.

The specific implementation manners involved in S710 to S712 above are consistent with the specific implementation manners involved in S610 to S612 in FIG. 6, and details are not described herein again.

S713~S716: Perform the location service process, where the location service related messages between LLMF A and the current serving RAN node of the target UE (third RAN node) are directly routed through the first RAN node co-located with LLMF A, that is, the first RAN node is used. Two routing methods.

In S713, the first RAN node sends an LLP transmission message to the third RAN node through the Xn port, and the LLP transmission message carries the target UE identity and LLP information. Specifically, after LLMF A co-located with the first RAN node determines that the RAN node where the target UE resides is the third RAN node, it responds to the NG interface routing mode sent by the third RAN node and triggers the LLMF A to be the target UE. The positioning service process is executed, and then the first RAN node sends an LLP transmission message to the third RAN node where the target UE currently resides through the Xn port to obtain the location information of the target UE. Optionally, the LLP transmission message sent by the first RAN node through the NG interface is an Xn LLP TRANSPORT message.

The specific implementations involved in S714 to S716 above are consistent with the specific implementations involved in S516 to S518 in FIG. 5, and will not be repeated here.

It should be noted that the above S713 to S716 exemplarily show the process of the LMF providing location services for the terminal. In actual applications, S713 to S716 will be repeated multiple times in order to successfully obtain the location information of the terminal.

So far, the LLMF A co-located with the first RAN node successfully obtains the location information of the target UE, and the process of LLMF A using Xn port routing to provide location services for the target UE ends.

S717: After the LLMF A co-located with the first RAN node obtains the location information of the target UE, it sends a location determination response message to the AMF, where the location determination response message carries the location information of the UE.

S718: After receiving the confirm location response message, the AMF sends a location service response message to the GMLC, where the location service response message carries the location information of the UE.

S719: After receiving the location service response message, the GMLC sends a location service response message to the location client, where the location service response message carries the location information of the UE.

The specific implementations involved in S717 to S719 above are the same as the specific implementations involved in S622 to S624 in FIG. 6, and will not be repeated here.

It should be noted that S701 is an optional step. That is, the positioning service request for the target UE can be initiated by the positioning client or the network side can actively initiate. For example, the GMLC needs to obtain the location information of the target UE based on the strategy or configuration of the network side, and then actively initiates a location service request for the target UE. This application does not limit this. It should be noted that the signaling interaction sequence in the signaling interaction diagram is only an example, and does not strictly represent the sequence of signaling interaction in actual applications.

Based on the signaling interaction diagrams shown in Figure 7 and Figure 4, in an achievable manner, the context response message sent by the first RAN node to the third RAN node in S711 carries the location service information of the target UE, which can trigger The third RAN node continues to perform the location service initiated by LLMF A, and after restoring or establishing an RRC connection with the target UE, the third RAN node sends a downlink RRC message to the target UE according to the location service information of the target UE to obtain The location information of the target UE. The third RAN node carries the location information returned by the target UE in response to the downlink RRC message in the LLP transmission message and sends it to the first RAN node through the Xn port, so that the LLMF co-located with the first RAN node A obtains the location information of the target UE, and completes the positioning service process of the target UE.

Based on the same technical concept, an embodiment of the present application also provides an access point device, which can implement the process performed in the foregoing implementation.

As shown in FIG. 8, an embodiment of the present application provides a schematic structural diagram of an access node device.

As shown in the figure, the access node device 800 includes: a receiving unit 801, a processing unit 802, and a sending unit 803.

The receiving unit 801 is configured to receive a location determination request message sent by a mobility management function entity, where the location determination request message is used to request a location service for a target terminal; wherein, the first access node is the target terminal The first access node is associated with a local location management function LMF, and the local LMF is selected by the mobility management function entity to provide location services for the target terminal.

The processing unit 802 is configured to: when the local LMF initiates the location service process of the target terminal, and detects that the target terminal is in a radio resource control RRC inactive state, then the sending unit 803 requests the second An access node in the notification area where the access node is located pages the target terminal.

The receiving unit 801 is further configured to receive location service routing indication information sent by a third access node, where the third access node is the current serving access node of the target terminal, and the location service routing indication information is used In order to indicate the first routing mode or the second routing mode, the first routing mode is that the access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the The second routing mode is that the access node associated with the local LMF performs message routing with the third access node.

The receiving unit 801 is further configured to receive the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the A mobility management function entity, when the location service routing indication information indicates a second routing mode, the first network device is a third access node.

The sending unit 803 is configured to send a location determination response message to the mobility management function entity, where the location determination response message carries location information of the target terminal.

Optionally, the location service routing indication information is carried in a context request message of the target terminal, and the context request message of the target terminal is sent after the third access node paging to the target terminal; The processing unit 802 is further configured to respond to the context request message of the target terminal, and send the context response message of the target terminal to the third access node through the sending unit 803; the context response message of the target terminal carries all The context information of the target terminal and the location service information of the target terminal.

Optionally, the processing unit 802 is further configured to send the Long Term Evolution Positioning Protocol LLP transmission message sent by the local LMF to the first network device through the sending unit 803 according to the location service routing instruction information. The LLP transmission message carries the identifier of the target terminal and LLP information.

As shown in FIG. 9, an embodiment of the present application provides a schematic structural diagram of an access node device.

As shown in the figure, the access node device 900 includes: a receiving unit 901, a processing unit 902, and a sending unit 903.

The receiving unit 901 is configured to receive a determination location request message sent from a mobility management function entity, the determination location request message is used to request a location service for the target terminal, and the determination location request message carries the first access node The information of the first access node is the serving access node information of the target terminal stored by the mobility management function entity; wherein, the second access node is associated with a local location management function LMF, so The local LMF is selected by the mobility management function entity to provide location services for the target terminal.

The sending unit 903 is configured to send a Long Term Evolution Positioning Protocol LLP transmission message to the first access node.

The receiving unit 901 is further configured to receive location service routing indication information sent by the first access node, where the location service routing indication information is used to indicate a first routing mode or a second routing mode, and the first routing The method is that the access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing method is that the access node associated with the local LMF and the third access node Three access nodes; wherein the location service routing indication information is determined by a third access node and sent to the first access node, and the third access node is the current serving access node of the target terminal The location service routing indication information is sent by the third access node after paging the target terminal in response to the paging request of the first access node.

The receiving unit 901 is further configured to receive the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates a first routing mode, the first network device is For the mobility management function entity, when the location service routing indication information indicates a second routing mode, the first network device is the third access node.

The sending unit 903 is further configured to send a location determination response message to the mobility management function entity, where the location determination response message carries location information of the target terminal.

Optionally, the sending unit 903 is specifically configured to send the LLP transmission message to the mobility management function entity, so that the mobility management function entity transfers the LLP transmission message according to the stored service access node information of the target terminal The LLP transmission message is sent to the first access node.

Optionally, the processing unit 902 is configured to send the LLP transmission message sent by the local LMF to the first network device through the sending unit 903 according to the location service routing instruction information.

Optionally, if the location service routing indication information indicates the first routing mode, the second access node sends the LLP transmission message sent by the local LMF to the mobility management function entity, so that the mobility The management function entity sends a downlink non-access stratum NAS transmission message to the third access node to obtain the location information of the target terminal; wherein, the downlink NAS transmission message carries the identity of the target terminal and the LLP Information; if the location service routing indication information indicates the second routing mode, the second access node sends the LLP transmission message sent by the local LMF to the third access node to obtain the target Location information of the terminal.

As shown in FIG. 10, an embodiment of the present application provides a schematic structural diagram of an access node device.

As shown in the figure, the access node device 1000 includes: a receiving unit 1001, a processing unit 1002, and a sending unit 1003.

The processing unit 1002 is configured to, after paging the target terminal in response to the paging request of the first access node, determine location service routing indication information for the target terminal, where the location service routing indication information is used to indicate the first route Or the second routing method, the first routing method is that the access node associated with the local location management function LMF performs message routing with the third access node through the mobility management function entity, and the second routing method is the local LMF The associated access node performs message routing with the third access node, and the local LMF is the local LMF associated with the first access node or the local LMF associated with the second access node; wherein, the local LMF The LMF selected for the mobility management function entity to provide location services for the target terminal, the first access node is the original serving access node of the target terminal, and the second access node is the first A non-serving access node of the target terminal in a notification area where an access node is located, and the third access node is the current serving access node of the target terminal.

The processing unit 1002 is further configured to send the location information of the target terminal to the first network device through the sending unit 1003 according to the location service routing instruction information; wherein, when the location service routing instruction information indicates the first network device In the routing mode, the first network device is the mobility management function entity, and when the location service routing indication information indicates the second routing mode, the first network device is the access node associated with the local LMF.

Optionally, the sending unit 1003 is further configured to send a context request message of the target terminal to the first access node, where the context request message of the target terminal carries the location service routing indication information; the receiving The unit 1001 is configured to receive the context response message of the target terminal sent by the first access node in response to the context request message of the target terminal, where the context response message of the target terminal carries context information of the target terminal and The location service information of the target terminal, wherein the location service information includes at least a location session identifier and location QoS information of the target terminal.

Optionally, the receiving unit 1001 is further configured to receive the location service information of the target terminal sent by the first access node; the processing unit 1002 is further configured to obtain the location service information of the target terminal The location information of the target terminal.

Optionally, the location service routing indication information indicates the first routing mode; the sending unit 1003 is further configured to send a path switching request message to the mobility management function entity, and the path switching request message carries a path for indicating the first routing mode. Location service routing indication information in a routing mode; the receiving unit 1001 is further configured to receive a path switching response message sent by the mobility management function entity.

Optionally, the receiving unit 1001 is further configured to receive a Long Term Evolution Positioning Protocol LLP transmission message sent by the first network device, where the LLP transmission message carries the identifier of the target terminal and LLP information.

Based on the same technical concept, an embodiment of the present application also provides a mobility management function entity device, which can implement the process executed in the foregoing implementation.

As shown in FIG. 11, an embodiment of the present application provides a schematic structural diagram of a mobility management function entity device.

As shown in the figure, the mobile management function entity device 1100 includes: a receiving unit 1101, a processing unit 1102, and a sending unit 1103.

The receiving unit 1101 is configured to receive a location service request message from the gateway location center GMLC, where the location service request message is used to request selection of a location management function LMF for the target terminal;

The processing unit 1102 is configured to select a local LMF that provides location services for the target terminal, and send a location determination request message to the local LMF through the sending unit 1103, and the access node associated with the local LMF is the first An access node or a second access node; wherein, the first access node is the serving access node of the target terminal stored by the mobility management function entity, and the second access node is the The non-serving access node of the target terminal in the notification area where the serving access node is located;

The processing unit 1102 is further configured to respond to an uplink non-access stratum NAS message from a third access node, and send the location information of the target terminal to the local LMF through the sending unit 1103, and the third The access node is the current serving access node of the target terminal, and the uplink NAS message carries location information of the target terminal;

The receiving unit 1101 is further configured to receive a location determination response message from the local LMF, where the location determination response message carries location information of the target terminal;

The sending unit 1103 is configured to send a location service response message to the GMLC, where the location service response message carries location information of the target terminal.

Optionally, the processing unit 1102 is further configured to respond to a Long Term Evolution Positioning Protocol LLP transmission message from the local LMF, and send a downlink NAS message to the third access node through the sending unit 1103, and the LLP transmission The message and the downlink NAS message carry the identifier of the target terminal and LLP information.

Optionally, the receiving unit 1101 is further configured to receive a path switching request message from the third access node, wherein the path switching request message carries location service routing indication information, and the location service routing indication information It is used to instruct the third access node to perform message routing through the access node associated with the local LMF through the mobility management function entity.

Optionally, the sending unit 1103 is further configured to send a path switching response message to the third access node.

Optionally, the local LMF is a local LMF associated with the second access node; the receiving unit 1101 is further configured to receive an LLP transmission message sent by the local LMF in response to the determining location request message; The sending unit 1103 is further configured to send the LLP transmission message to the first access node.

Based on the same technical concept, an embodiment of the present application also provides a communication device, which can implement the process performed in the foregoing implementation.

FIG. 12 shows a schematic structural diagram of a communication device 1200 provided by an embodiment of the present application, that is, another schematic structural diagram of an access node device 800 is shown. Referring to FIG. 12, the communication device 1200 includes a processor 1201, a memory 1202, and a communication interface 1203. Wherein, the processor 1201 may also be a controller. The processor 1201 is configured to support the terminal to perform the functions involved in the foregoing procedures. The memory 1202 is used for coupling with the processor 1201, and stores necessary program instructions and data for the terminal. The processor 1201 is connected to the memory 1202, and the memory 1202 is used to store instructions. The processor 1201 is used to execute the instructions stored in the memory 1202 to complete the steps of the client device performing corresponding functions in the foregoing method.

In the embodiments of this application, the concepts, explanations, detailed descriptions and other steps related to the access node device 800 and the communication device 1200 related to the technical solutions provided in the embodiments of this application, please refer to the foregoing methods or other embodiments for these contents The description is not repeated here.

It should be noted that the aforementioned processors in the embodiments of the present application may be central processing units (CPU), general-purpose processors, digital signal processors (digital signal processors, DSP), and application-specific integrated circuits (application-specific integrated circuits). integrated circuit, ASIC), field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the content of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. Wherein, the memory may be integrated in the processor, or may be provided separately from the processor.

FIG. 13 shows a schematic structural diagram of a communication apparatus 1300 provided by an embodiment of the present application, that is, another schematic structural diagram of an access node device 900 is shown. Referring to FIG. 13, the communication device 1300 includes a processor 1301, a memory 1302, and a communication interface 1303. The processor 1301 may also be a controller. The processor 1301 is configured to support the terminal to perform the functions involved in the foregoing procedures. The memory 1302 is used to couple with the processor 1301, and it stores necessary program instructions and data for the terminal. The processor 1301 is connected to the memory 1302, and the memory 1302 is used to store instructions, and the processor 1301 is used to execute the instructions stored in the memory 1302 to complete the steps of the client device performing corresponding functions in the foregoing method.

In the embodiments of the present application, for the concepts, explanations, detailed descriptions and other steps related to the access node device 900 and the communication device 1300 related to the technical solutions provided in the embodiments of the present application, please refer to the foregoing methods or other embodiments for these contents The description is not repeated here.

FIG. 14 shows a schematic structural diagram of a communication apparatus 1400 provided by an embodiment of the present application, that is, another schematic structural diagram of an access node device 1000 is shown. Referring to FIG. 14, the communication device 1400 includes a processor 1401, a memory 1402, and a communication interface 1403. Among them, the processor 1401 may also be a controller. The processor 1401 is configured to support the terminal to perform the functions involved in the foregoing procedures. The memory 1402 is used for coupling with the processor 1401, and stores necessary program instructions and data for the terminal. The processor 1401 is connected to the memory 1402. The memory 1402 is used to store instructions. The processor 1401 is used to execute the instructions stored in the memory 1402 to complete the steps of the client device performing corresponding functions in the foregoing method.

In the embodiments of the present application, for the concepts, explanations, detailed descriptions and other steps related to the access node device 1000 and the communication device 1400 related to the technical solutions provided in the embodiments of the present application, please refer to the foregoing methods or other embodiments for these contents The description is not repeated here.

FIG. 15 shows a schematic structural diagram of a communication apparatus 1500 provided by an embodiment of the present application, that is, another schematic structural diagram of a mobility management function entity device 1100. Referring to FIG. 15, the communication device 1500 includes a processor 1501, a memory 1502, and a communication interface 1503. The processor 1501 may also be a controller. The processor 1501 is configured to support the terminal to perform the functions involved in the foregoing procedures. The memory 1502 is used to couple with the processor 1501, and it stores necessary program instructions and data for the terminal. The processor 1501 is connected to the memory 1502, and the memory 1502 is used to store instructions, and the processor 1501 is used to execute the instructions stored in the memory 1502 to complete the steps of the client device performing corresponding functions in the foregoing method.

In the embodiments of the present application, the concepts, explanations, detailed descriptions and other steps related to the mobility management function entity equipment 1100 and the communication device 1500 related to the technical solutions provided in the embodiments of the present application, please refer to the foregoing methods or other embodiments about these concepts. The description of the content will not be repeated here.

It should be noted that the aforementioned processors in the embodiments of the present application may be central processing units (CPU), general-purpose processors, digital signal processors (digital signal processors, DSP), and application-specific integrated circuits (application-specific integrated circuits). integrated circuit, ASIC), field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the content of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of DSP and microprocessor, and so on. Wherein, the memory may be integrated in the processor, or may be provided separately from the processor.

Based on the same technical concept, the embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to make the computer execute the process executed in FIG. 8.

Based on the same technical concept, the embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to make the computer execute the process executed in FIG. 9.

Based on the same technical concept, the embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to make the computer execute the process executed in FIG. 10.

Based on the same technical concept, the embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to make the computer execute the process executed in FIG. 11.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these modifications and variations.

Claims

A terminal positioning service method, characterized in that it includes:

The first access node receives a location determination request message sent by the mobility management function entity, where the location determination request message is used to request a location service for the target terminal; wherein, the first access node is the original service of the target terminal An access node, the first access node is associated with a local location management function LMF, and the local LMF is selected by the mobility management function entity to provide a location service for the target terminal;

When the first access node detects that the target terminal is in a radio resource control RRC inactive state when the local LMF initiates the location service process of the target terminal, it requests a notification that the first access node is located The access node in the area pages the target terminal;

The first access node receives location service routing indication information sent by a third access node, the third access node is the current serving access node of the target terminal, and the location service routing indication information is used to indicate The first routing method or the second routing method is that the access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing The manner is that the access node associated with the local LMF performs message routing with the third access node;

The first access node receives the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the mobility management A functional entity, when the location service routing indication information indicates a second routing mode, the first network device is a third access node;

The first access node sends a location determination response message to the mobility management function entity, where the location determination response message carries location information of the target terminal.
The method according to claim 1, wherein the location service routing indication information is carried in a context request message of the target terminal, and the context request message of the target terminal is the third access node paged to the target terminal. Sent after the target terminal;

After the first access node receives the context request message of the target terminal sent by the third access node, the method further includes:

In response to the context request message of the target terminal, the first access node sends a context response message of the target terminal to the third access node; the context response message of the target terminal carries the context response message of the target terminal Context information and location service information of the target terminal.
The method according to claim 1, wherein before the first access node receives the location information of the target terminal sent by the first network device, the method further comprises:

The first access node sends a Long Term Evolution Positioning Protocol LLP transmission message sent by the local LMF to the first network device according to the location service routing indication information, and the LLP transmission message carries the identity of the target terminal And LLP information.
The method according to claim 3, wherein the first access node sending the LLP transmission message sent by the local LMF to the first network device according to the location service routing indication information comprises:

If the location service routing indication information indicates the first routing mode, the first access node sends the LLP transmission message sent by the local LMF to the mobility management function entity, so that the mobility management function entity sends The third access node sends a downlink non-access stratum NAS transmission message to obtain the location information of the target terminal; wherein, the downlink NAS transmission message carries the identity of the target terminal and the LLP information;

If the location service routing indication information indicates the second routing mode, the first access node sends the LLP transmission message sent by the local LMF to the third access node to obtain the location of the target terminal information.
The method according to any one of claims 1 to 4, wherein the determining location request message received by the first access node carries the identification of the target terminal and the location service information of the target terminal, The location service information includes at least a location session identifier and location QoS information of the target terminal.
A terminal positioning service method, characterized in that it includes:

The second access node receives a location determination request message sent from the mobility management function entity, where the location determination request message is used to request a location service for the target terminal, and the location determination request message carries information of the first access node, The information of the first access node is the serving access node information of the target terminal stored by the mobility management function entity; wherein, the second access node is associated with a local positioning management function LMF, and the local LMF Selected by the mobility management function entity to provide location services for the target terminal;

Sending, by the second access node, a Long Term Evolution Positioning Protocol LLP transmission message to the first access node;

The second access node receives location service routing indication information sent by the first access node, where the location service routing indication information is used to indicate a first routing mode or a second routing mode, and the first routing mode is The access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing mode is that the access node associated with the local LMF and the third access node Access node; wherein the location service routing indication information is determined by a third access node and sent to the first access node, and the third access node is the current serving access node of the target terminal, so The location service routing indication information is sent by the third access node after paging the target terminal in response to the paging request of the first access node;

The second access node receives the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates a first routing mode, the first network device is the A mobility management function entity, when the location service routing indication information indicates a second routing mode, the first network device is the third access node;

The second access node sends a location determination response message to the mobility management function entity, where the location determination response message carries the location information of the target terminal.
The method according to claim 6, wherein the sending of the LLP transmission message by the second access node to the first access node comprises:

The second access node sends the LLP transmission message to the mobility management function entity, so that the mobility management function entity sends the LLP transmission message to the stored service access node information of the target terminal The first access node.
The method according to claim 6, wherein before the second access node receives the location information of the target terminal sent by the first network device, the method further comprises:

The second access node sends the LLP transmission message sent by the local LMF to the first network device according to the location service routing indication information.
The method according to claim 8, wherein the second access node sending the LLP transmission message sent by the local LMF to the first network device according to the location service routing indication information comprises:

If the location service routing indication information indicates the first routing mode, the second access node sends the LLP transmission message sent by the local LMF to the mobility management function entity, so that the mobility management function entity sends The third access node sends a downlink non-access stratum NAS transmission message to obtain the location information of the target terminal; wherein, the downlink NAS transmission message carries the identity of the target terminal and the LLP information;

If the location service routing indication information indicates the second routing mode, the second access node sends the LLP transmission message sent by the local LMF to the third access node to obtain the target terminal location information.
The method according to any one of claims 6 to 9, wherein the determining location request message received by the second access node carries the identification of the target terminal and the location service information of the target terminal, The location service information includes at least a location session identifier and location QoS information of the target terminal.
The method according to any one of claims 6 to 9, wherein the LLP transmission message carries the identifier of the target terminal and the LLP information.
A terminal positioning service method, characterized in that it includes:

After paging the target terminal in response to the paging request of the first access node, the third access node determines location service routing indication information for the target terminal, where the location service routing indication information is used to indicate the first routing method or The second routing method, the first routing method is that the access node associated with the local location management function LMF performs message routing with the third access node through the mobility management function entity, and the second routing method is the local LMF associated The access node performs message routing with the third access node, and the local LMF is the local LMF associated with the first access node or the local LMF associated with the second access node; wherein, the local LMF is the The LMF selected by the mobility management function entity to provide location services for the target terminal, the first access node is the original serving access node of the target terminal, and the second access node is the first access node A non-serving access node of the target terminal in the notification area where the ingress node is located, and the third access node is the current serving access node of the target terminal;

The third access node sends the location information of the target terminal to the first network device according to the location service routing indication information; wherein, when the location service routing indication information indicates the first routing mode, the first The network device is the mobility management function entity, and when the location service routing indication information indicates the second routing mode, the first network device is the access node associated with the local LMF.
The method according to claim 12, wherein after the third access node determines location service routing indication information for the target terminal, the method further comprises:

Sending, by the third access node, a context request message of the target terminal to the first access node, where the context request message of the target terminal carries the location service routing indication information;

The third access node receives the context response message of the target terminal sent by the first access node in response to the context request message of the target terminal, where the context response message of the target terminal carries the target terminal Context information and location service information of the target terminal, where the location service information includes at least a location session identifier and location QoS information of the target terminal.
The method of claim 12, wherein the method further comprises:

Receiving, by the third access node, the location service information of the target terminal sent by the first access node;

Before the third access node sends the location information of the target terminal to the first network device according to the location service routing indication information, the method further includes:

The third access node obtains the location information of the target terminal according to the location service information of the target terminal.
The method of claim 12, wherein the location service routing indication information indicates a first routing mode;

Before the third access node sends the location information of the target terminal to the first network device, the method further includes:

Sending, by the third access node, a path switch request message to the mobility management function entity, where the path switch request message carries location service routing indication information used to indicate the first routing mode;

The third access node receives a path switching response message sent by the mobility management function entity.
The method according to claim 12, wherein before the third access node sends the location information of the target terminal to the first network device, the method further comprises:

The third access node receives a Long Term Evolution Positioning Protocol LLP transmission message sent by the first network device, where the LLP transmission message carries the identifier of the target terminal and LLP information.
A terminal positioning service method, characterized in that it includes:

The mobility management function entity receives a location service request message from the gateway location center GMLC, where the location service request message is used to request selection of the location management function LMF for the target terminal;

The mobility management function entity selects a local LMF that provides location services for the target terminal, and sends a location determination request message to the local LMF. The access node associated with the local LMF is the first access node or the second access node. Ingress node; wherein, the first access node is the serving access node of the target terminal stored by the mobility management function entity, and the second access node is the notification area where the serving access node is located The non-serving access node of the target terminal within;

The mobility management function entity responds to the uplink non-access stratum NAS message from the third access node and sends the location information of the target terminal to the local LMF, and the third access node is the target terminal For the current serving access node, the uplink NAS message carries the location information of the target terminal;

The mobility management function entity receives a location determination response message from the local LMF, and sends a location service response message to the GMLC, where the location determination response message and the location service response message carry the location of the target terminal information.
The method according to claim 17, wherein before the mobility management function entity sends a positioning message to the local LMF, the method further comprises:

In response to the Long Term Evolution Positioning Protocol LLP transmission message from the local LMF, the mobility management function entity sends a downlink NAS message to the third access node, and the LLP transmission message and the downlink NAS message carry the target The identification and LLP information of the terminal.
The method of claim 17, wherein the method further comprises:

The mobility management function entity receives a path switch request message from the third access node, and sends a path switch response message to the third access node; wherein the path switch request message carries a location service routing instruction Information, the location service routing indication information is used to instruct the third access node to perform message routing with the access node associated with the local LMF through the mobility management function entity.
The method according to any one of claims 17 to 19, wherein the local LMF is a local LMF associated with the second access node;

After the mobility management function entity sends a location determination request message to the local LMF, the method further includes:

Receiving, by the mobility management function entity, an LLP transmission message sent by the local LMF in response to the determining location request message;

The mobility management function entity sends the LLP transmission message to the first access node.
The method according to any one of claims 17 to 19, wherein the determination location request message sent by the mobility management function entity carries the identifier of the target terminal and the location service information of the target terminal, wherein The location service information includes at least a location session identifier and location QoS information of the target terminal.
The method according to any one of claims 17 to 19, wherein the mobility management function entity is AMF or MME.
An access node device, characterized by comprising: a receiving unit, a processing unit, and a sending unit;

The receiving unit is configured to receive a positioning determination request message sent by a mobility management function entity, where the positioning determination request message is used to request a positioning service for a target terminal; wherein, the first access node is the target terminal's The original serving access node, the first access node is associated with a local positioning management function LMF, and the local LMF is selected by the mobility management function entity to provide a positioning service for the target terminal;

The processing unit is configured to, when the local LMF initiates the location service process of the target terminal, and detects that the target terminal is in a radio resource control RRC inactive state, then request the first access through the sending unit The access node in the notification area where the ingress node is located pages the target terminal;

The receiving unit is further configured to receive location service routing indication information sent by a third access node, where the third access node is the current serving access node of the target terminal, and the location service routing indication information is used for Indicate the first routing mode or the second routing mode, the first routing mode is that the access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing mode The routing mode is that the access node associated with the local LMF performs message routing with the third access node;

The receiving unit is further configured to receive the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the mobile A management function entity, when the location service routing indication information indicates a second routing mode, the first network device is a third access node;

The sending unit is configured to send a location determination response message to the mobility management function entity, where the location determination response message carries location information of the target terminal.
An access node device, characterized by comprising: a receiving unit, a processing unit, and a sending unit;

The receiving unit is configured to receive a determination location request message sent from a mobility management function entity, the determination location request message is used to request a location service for the target terminal, and the determination location request message carries the information of the first access node Information, the information of the first access node is the serving access node information of the target terminal stored by the mobility management function entity; wherein, the second access node is associated with a local positioning management function LMF, and The local LMF is selected by the mobility management function entity to provide location services for the target terminal;

The sending unit is configured to send a Long Term Evolution Positioning Protocol LLP transmission message to the first access node;

The receiving unit is further configured to receive location service routing indication information sent by the first access node, where the location service routing indication information is used to indicate a first routing mode or a second routing mode, the first routing mode The access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing mode is that the access node associated with the local LMF and the third access node Access node; wherein the location service routing indication information is determined by a third access node and sent to the first access node, and the third access node is the current serving access node of the target terminal, The location service routing indication information is sent by the third access node after paging the target terminal in response to the paging request of the first access node;

The receiving unit is further configured to receive the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates a first routing mode, the first network device is For the mobility management function entity, when the location service routing indication information indicates a second routing mode, the first network device is the third access node;

The sending unit is further configured to send a location determination response message to the mobility management function entity, where the location determination response message carries location information of the target terminal.
An access node device, characterized by comprising: a receiving unit, a processing unit, and a sending unit;

The processing unit is configured to, after paging the target terminal in response to the paging request of the first access node, determine location service routing indication information for the target terminal, where the location service routing indication information is used to indicate the first routing mode Or the second routing method, the first routing method is that the access node associated with the local location management function LMF performs message routing with the third access node through the mobility management function entity, and the second routing method is the local LMF association The access node of, performs message routing with the third access node, and the local LMF is the local LMF associated with the first access node or the local LMF associated with the second access node; wherein, the local LMF is The LMF selected by the mobility management function entity to provide location services for the target terminal, the first access node is the original serving access node of the target terminal, and the second access node is the first The non-serving access node of the target terminal in the notification area where the access node is located, and the third access node is the current serving access node of the target terminal;

The processing unit is further configured to send the location information of the target terminal to the first network device through the sending unit according to the location service routing instruction information; wherein, when the location service routing instruction information indicates the first routing mode When the first network device is the mobility management function entity, and when the location service routing indication information indicates the second routing mode, the first network device is the access node associated with the local LMF.
A mobility management function entity device, which is characterized by comprising: a receiving unit, a processing unit, and a sending unit;

The receiving unit is configured to receive a location service request message from a gateway location center GMLC, where the location service request message is used to request selection of a location management function LMF for the target terminal;

The processing unit is configured to select a local LMF that provides location services for the target terminal, and send a location determination request message to the local LMF through the sending unit, and the access node associated with the local LMF is the first access node. Access node or second access node; wherein, the first access node is the serving access node of the target terminal stored by the mobility management function entity, and the second access node is the serving access node The non-serving access node of the target terminal in the notification area where the ingress node is located;

The processing unit is further configured to respond to an uplink non-access stratum NAS message from a third access node, and send the location information of the target terminal to the local LMF through the sending unit, and the third access The node is the current serving access node of the target terminal, and the uplink NAS message carries location information of the target terminal;

The receiving unit is further configured to receive a location determination response message from the local LMF, where the location determination response message carries location information of the target terminal;

The sending unit is configured to send a location service response message to the GMLC, where the location service response message carries the location information of the target terminal.
A communication device, characterized by comprising: a processor, a memory, and a communication interface;

The memory is used to store computer instructions;

The processor is configured to run the computer instructions to perform the following steps:

Receive a location determination request message sent by a mobility management function entity, where the location determination request message is used to request to provide a location service for the target terminal; wherein the communication device is the original serving access node of the target terminal, and the communication device Associated with a local positioning management function LMF, and the local LMF is selected by the mobility management function entity to provide a positioning service for the target terminal;

When the local LMF initiates the location service process of the target terminal, and detects that the target terminal is in a radio resource control RRC inactive state, it requests the access node in the notification area where the communication device is located to page the Target terminal

Receiving location service routing indication information sent by a third access node, where the third access node is the current serving access node of the target terminal, and the location service routing indication information is used to indicate the first routing mode or the second routing mode Routing mode, the first routing mode is that the access node associated with the local LMF performs message routing with the third access node through the mobility management function entity, and the second routing mode is the local LMF association The access node of and the third access node performs message routing;

Receiving the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the mobility management function entity, and when the location service When the service routing indication information indicates the second routing mode, the first network device is the third access node;

Send a location determination response message to the mobility management function entity, where the location determination response message carries the location information of the target terminal.
The communication device according to claim 27, wherein the location service routing indication information is carried in a context request message of the target terminal, and the context request message of the target terminal is the third access node paged to Sent after the target terminal;

After receiving the context request message of the target terminal sent by the third access node, the processor is further configured to:

In response to the context request message of the target terminal, send a context response message of the target terminal to the third access node; the context response message of the target terminal carries context information of the target terminal and the target terminal Location service information.
The communication device according to claim 27, wherein before receiving the location information of the target terminal sent by the first network device, the processor is further configured to:

The Long Term Evolution Positioning Protocol LLP transmission message sent by the local LMF is sent to the first network device according to the location service routing indication information, where the LLP transmission message carries the target terminal's identity and LLP information.
The communication device according to claim 29, wherein when sending the LLP transmission message sent by the local LMF to the first network device according to the location service routing instruction information, the processor is configured to:

If the location service routing indication information indicates the first routing mode, the LLP transmission message sent by the local LMF is sent to the mobility management function entity, so that the mobility management function entity sends the message to the third access node Sending a downlink non-access stratum NAS transmission message to obtain the location information of the target terminal; wherein the downlink NAS transmission message carries the identity of the target terminal and the LLP information;

If the location service routing indication information indicates the second routing mode, the LLP transmission message sent by the local LMF is sent to the third access node to obtain the location information of the target terminal.
The communication device according to any one of claims 27 to 30, wherein the location determination request message received by the processor carries the identification of the target terminal and the location service information of the target terminal, wherein The location service information includes at least a location session identifier and location QoS information of the target terminal.
A communication device, characterized by comprising: a processor, a memory, and a communication interface;

The memory is used to store computer instructions;

The processor is configured to run the computer instructions to perform the following steps:

Receive a determination location request message sent from a mobility management function entity, the determination location request message is used to request to provide location services for the target terminal, the determination location request message carries information about the first access node, and the first access node The ingress node information is the serving access node information of the target terminal stored by the mobility management function entity; wherein, the communication device is associated with a local positioning management function LMF, and the local LMF is selected by the mobility management function entity Providing location services for the target terminal;

Sending a Long Term Evolution Positioning Protocol LLP transmission message to the first access node;

Receive location service routing indication information sent by the first access node, where the location service routing indication information is used to indicate a first routing mode or a second routing mode, and the first routing mode is the connection associated with the local LMF The ingress node performs message routing with the third access node through the mobility management function entity, and the second routing mode is the access node associated with the local LMF and the third access node; wherein, the The location service routing indication information is determined by a third access node and sent to the first access node, the third access node is the current serving access node of the target terminal, and the location service routing indication information is Sent by the third access node after paging the target terminal in response to the paging request of the first access node;

Receiving the location information of the target terminal sent by the first network device; wherein, when the location service routing indication information indicates a first routing mode, the first network device is the mobility management function entity, and when When the location service routing indication information indicates a second routing mode, the first network device is the third access node;

Send a location determination response message to the mobility management function entity, where the location determination response message carries the location information of the target terminal.
The communication device according to claim 32, wherein when sending an LLP transmission message to the first access node, the processor is configured to:

Send the LLP transmission message to the mobility management function entity, so that the mobility management function entity sends the LLP transmission message to the first access node according to the stored service access node information of the target terminal .
The communication device according to claim 32, wherein before receiving the location information of the target terminal sent by the first network device, the processor is further configured to:

Sending the LLP transmission message sent by the local LMF to the first network device according to the location service routing instruction information.
The communication device according to claim 34, wherein when sending the LLP transmission message sent by the local LMF to the first network device according to the location service routing indication information, the processor is configured to:

If the location service routing indication information indicates the first routing mode, the LLP transmission message sent by the local LMF is sent to the mobility management function entity, so that the mobility management function entity sends the message to the third access node Sending a downlink non-access stratum NAS transmission message to obtain the location information of the target terminal; wherein the downlink NAS transmission message carries the identity of the target terminal and the LLP information;

If the location service routing indication information indicates the second routing mode, the LLP transmission message sent by the local LMF is sent to the third access node to obtain the location information of the target terminal.
The communication device according to any one of claims 32 to 35, wherein the location determination request message received by the processor carries the identification of the target terminal and the location service information of the target terminal, wherein The location service information includes at least a location session identifier and location QoS information of the target terminal.
The communication device according to any one of claims 32 to 35, wherein the LLP transmission message carries the identifier of the target terminal and the LLP information.
A communication device, characterized by comprising: a processor, a memory, and a communication interface;

The memory is used to store computer instructions;

The processor is configured to run the computer instructions to perform the following steps:

After paging the target terminal in response to the paging request of the first access node, determining location service routing indication information for the target terminal, where the location service routing indication information is used to indicate the first routing mode or the second routing mode, The first routing method is that the access node associated with the local location management function LMF performs message routing with the communication device through the mobility management function entity, and the second routing method is that the access node associated with the local LMF and the The communication device performs message routing, and the local LMF is the local LMF associated with the first access node or the local LMF associated with the second access node; wherein the local LMF is selected by the mobility management function entity. The target terminal provides an LMF for positioning services, the first access node is the original serving access node of the target terminal, and the second access node is the target in the notification area where the first access node is located A non-serving access node of the terminal, the communication device is the current serving access node of the target terminal;

Send the location information of the target terminal to the first network device according to the location service routing indication information; wherein, when the location service routing indication information indicates the first routing mode, the first network device is the mobility management A functional entity, when the location service routing indication information indicates a second routing mode, the first network device is an access node associated with the local LMF.
The communication device according to claim 38, wherein after determining the location service routing indication information for the target terminal, the processor is further configured to:

Sending a context request message of the target terminal to the first access node, where the context request message of the target terminal carries the location service routing indication information;

Receiving the context response message of the target terminal sent by the first access node in response to the context request message of the target terminal, where the context response message of the target terminal carries context information of the target terminal and the target terminal Wherein, the location service information includes at least a location session identifier and location QoS information of the target terminal.
The communication device according to claim 38, wherein the processor is further configured to:

Receiving the location service information of the target terminal sent by the first access node;

Before sending the location information of the target terminal to the first network device according to the location service routing instruction information, the processor is further configured to:

Acquiring the location information of the target terminal according to the location service information of the target terminal.
The communication device according to claim 38, wherein the location service routing indication information indicates a first routing mode;

Before sending the location information of the target terminal to the first network device, the processor is further configured to:

Sending a path switch request message to the mobility management function entity, where the path switch request message carries location service routing indication information used to indicate the first routing mode;

Receiving a path switching response message sent by the mobility management function entity.
The communication device according to claim 38, wherein before sending the location information of the target terminal to the first network device, the processor is further configured to:

Receiving a Long Term Evolution Positioning Protocol LLP transmission message sent by the first network device, where the LLP transmission message carries the identifier of the target terminal and LLP information.
A communication device, characterized by comprising: a processor, a memory, and a communication interface;

The memory is used to store computer instructions;

The processor is configured to run the computer instructions to perform the following steps:

Receiving a location service request message from the gateway location center GMLC, where the location service request message is used to request selection of a location management function LMF for the target terminal;

Select a local LMF that provides positioning services for the target terminal, and send a positioning request message to the local LMF, and the access node associated with the local LMF is the first access node or the second access node; The first access node is the serving access node of the target terminal stored by the communication device, and the second access node is the non-serving access node of the target terminal in the notification area where the serving access node is located. Access node

Responding to an uplink non-access stratum NAS message from a third access node, and sending the location information of the target terminal to the local LMF, where the third access node is the current serving access node of the target terminal , The uplink NAS message carries the location information of the target terminal;

Receive a location determination response message from the local LMF, and send a location service response message to the GMLC, where the location determination response message and the location service response message carry the location information of the target terminal.
The communication device according to claim 43, wherein before sending a positioning message to the local LMF, the processor is further configured to:

In response to a Long Term Evolution Positioning Protocol LLP transmission message from the local LMF, a downlink NAS message is sent to the third access node, where the LLP transmission message and the downlink NAS message carry the target terminal's identity and LLP information .
The communication device according to claim 43, wherein the processor is further configured to:

Receiving a path switching request message from the third access node, and sending a path switching response message to the third access node; wherein the path switching request message carries location service routing indication information, and the location service The routing indication information is used to instruct the third access node to perform message routing with the access node associated with the local LMF through the communication device.
The communication device according to any one of claims 43 to 45, wherein the local LMF is a local LMF associated with the second access node;

After sending a positioning determination request message to the local LMF, the processor is further configured to:

Receiving an LLP transmission message sent by the local LMF in response to the determining location request message;

Sending the LLP transmission message to the first access node.
The communication device according to any one of claims 43 to 45, wherein the location determination request message sent by the processor carries the identifier of the target terminal and the location service information of the target terminal, wherein The location service information includes at least a location session identifier and location QoS information of the target terminal.
The communication device according to any one of claims 43 to 45, wherein the communication device is an AMF or MME.
A computer-readable storage medium, wherein the storage medium stores computer instructions, which when executed by a processor, implement the method according to any one of claims 1 to 5.
A computer-readable storage medium, wherein the storage medium stores computer instructions, which when executed by a processor implement the method according to any one of claims 6 to 11.
A computer-readable storage medium, wherein the storage medium stores computer instructions, which when executed by a processor implement the method according to any one of claims 12 to 16.
A computer-readable storage medium, wherein the storage medium stores computer instructions, which when executed by a processor implement the method according to any one of claims 17 to 22.