WO2012079518A1

WO2012079518A1 - Method, system and device for obtaining user equipment location information

Info

Publication number: WO2012079518A1
Application number: PCT/CN2011/084035
Authority: WO
Inventors: 马卫国; 周燕飞
Original assignee: 大唐移动通信设备有限公司
Priority date: 2010-12-17
Filing date: 2011-12-15
Publication date: 2012-06-21
Also published as: CN102036375A; CN102036375B

Abstract

Embodiments of the present invention relate to the technical field of wireless communications, and specifically to a method, system and device for obtaining user equipment location information. The present invention solves the problem in the prior art of the network side having difficulty ascertaining promptly the location information, in terms of cell granularity, of an idle user equipment. Embodiments of the present invention provide a method for obtaining user equipment location information. The method comprises: a network-side device transmits a request message to a core network control node when said device needs to obtain the location identifier of a target user equipment, said message being used to instruct the core network control node to execute a paging operation; and the network-side device receives the location identifier from the core network control node. Because a paging operation is performed to obtain the location identifier of a target user equipment when the location identifier of the target user equipment is needed, the location, in terms of cell granularity, of an idle user equipment can be ascertained promptly, thereby increasing positioning efficiency and reducing the amount of time required for ascertaining the location of an idle user equipment.

Description

Method, system and device for acquiring terminal location information The application is submitted to the Chinese Patent Office on December 17, 2010, and the application number is 201010594527.3, and the invention name is

The priority of the Chinese Patent Application, which is incorporated herein by reference. The present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and device for acquiring terminal location information. BACKGROUND In a mobile communication system, a location update technology enables a successfully attached terminal (UE, User Equipment) to remain registered in the network while moving, and initiates a location update process when the terminal moves out of the registered location area. The location area in the 2G system is LA (Location Area), the location area in the 3G system is the routing area RA ( Routing Area), and the location area in the LTE system is the tracking area TA (Tracking Area). In a 2G/3G system, the location update process is initiated once the terminal crosses the LA/RA boundary; in the LTE (Long Term Evolution) system, in order to accommodate terminals moving at different rates and maintain paging and terminal location updates For the balance between frequencies, a TA List (tracking list) technology is developed, that is, when the terminal initiates an attach or location update process, the network assigns a TA List containing one or more TAs, when the terminal moves out of the TA List. The location update process is initiated.

In the 2G/3G/LTE system, the terminal can also update its registration in the network through the periodic location update process. The location update process is triggered when the terminal's periodic location update timer expires. In the LTE system, the default length of the periodic location update timer is 56 minutes.

When the terminal is in the connected state, the network can know the location of the terminal at the cell granularity; when the terminal is in the idle state, the network can only know the location of the terminal in the granularity of the location area (LA / RA / TA List). For an idle state terminal, the network can know the specific location information of the idle state terminal only when it initiates a periodic location update. Due to the long time of the periodic location update timer, the network cannot be informed of the terminal location in time.

In summary, it is difficult for the network side to know the location information of the idle state terminal at the cell granularity in time. SUMMARY OF THE INVENTION The embodiments of the present invention provide a method, a system, and a device for acquiring location information of a terminal, which are used to solve the problem that the network side in the prior art is difficult to know the location information of the idle state terminal at the cell granularity in time.

A method for obtaining location information of a terminal provided by an embodiment of the present invention includes:

When the network side device needs to obtain the location identifier of the target terminal, the device sends a request message to the core network control node. The request message is used to instruct the core network control node to perform a paging operation;

The network side device receives a location identifier from the core network control node.

Another method for obtaining terminal location information provided by the embodiment of the present invention includes:

After receiving the request message of the network side device, the core network control node performs a paging operation, where the request message is sent by the network side device when the location identifier of the target terminal needs to be obtained;

The core network control node sends the received location identifier from the base station to the network side device.

A system for obtaining terminal location information provided by an embodiment of the present invention includes:

a network side device, configured to send a request message when receiving a location identifier of the target terminal, and receive the location identifier;

The core network control node is configured to perform a paging operation after receiving the request message, and send the received location identifier from the base station to the network side device.

An apparatus for obtaining location information of a terminal provided by the embodiment of the present invention includes:

a message sending module, configured to send a request message to the core network control node when the location identifier of the target terminal needs to be obtained, where the request message is used to indicate that the core network control node performs a paging operation;

The first information receiving module is configured to receive a location identifier from the core network control node.

Another device for obtaining terminal location information provided by the embodiment of the present invention includes:

a first paging operation module, configured to perform a paging operation after receiving a request message of the network side device, where the request message is sent by the network side device when the location identifier of the target terminal needs to be obtained;

The response module is configured to send the received location identifier from the base station to the network side device.

When the location identifier of the target terminal needs to be obtained, a paging operation is performed;

Receive location identification from the base station.

The second paging operation module is configured to perform a paging operation when the location identifier of the target terminal needs to be obtained, and the second information receiving module is configured to receive the location identifier from the base station.

When the location identifier of the target terminal needs to be obtained, the paging operation is performed, and the location identifier of the terminal is obtained, so that the location of the idle state terminal at the cell granularity can be known in time, and the positioning efficiency is improved to shorten the time for knowing the idle terminal location. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural diagram of a system for acquiring terminal location information according to an embodiment of the present invention;

2 is a schematic structural diagram of a network side device according to an embodiment of the present invention; 3 is a schematic structural diagram of a control node of a core network according to an embodiment of the present invention;

4 is a schematic flowchart of a method for acquiring location information of a terminal by a network side device according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for acquiring terminal location information by a control node of a core network according to an embodiment of the present invention;

6 is a schematic flowchart of a method for acquiring a location identifier in an LTE system according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart of a method for acquiring location information in an LTE system according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an apparatus for acquiring location information of a terminal according to an embodiment of the present invention;

FIG. 9 is a schematic flowchart of a method for obtaining location information of a terminal according to an embodiment of the present invention. When the network side device needs to obtain the location identifier of the target terminal, the network side device sends a request message to the core network control node, and the core network control node receives the request message of the network side device and performs a paging operation. The location identifier from the base station is sent to the network side device. When the location identifier of the target terminal needs to be obtained, the paging operation is performed, and the location identifier of the terminal is obtained, so that the location of the idle state terminal at the cell granularity can be known in time.

In the following description process, the implementation of the cooperation between the network side device and the core network control node will be described first, and finally the implementation of the network side device and the core network control node will be described separately, but this does not mean that the two must cooperate with the implementation. In fact, when the network side device is implemented separately from the core network control node, the problems existing in the network side device and the core network control node are also solved, but only when the two are combined, a better technical effect is obtained.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the system for obtaining terminal location information in the embodiment of the present invention includes: a network side device 10 and a core network control node 20.

The network side device 10 is configured to send a request message to the core network control node 20 when receiving the location identifier of the target terminal, and receive the location identifier from the core network control node 20.

The core network control node 20 is configured to perform a paging operation after receiving the request message from the network side device 10, and send the received location identifier from the base station to the network side device 10.

There are many reasons why the network side device 10 needs to obtain the location identifier of the target terminal. For example: A commercial platform needs to know the location of the terminal and push information, and the location of the target terminal by the criminal police.

The network side device 10 sends a request message to the core network control node 20, which may be directly sent to the core network control node 20, or may send a request message to the core network control node 20 through the intermediate node.

Correspondingly, after receiving the request message, the core network control node 20 needs to perform a paging operation even if there is no downlink data or downlink signaling currently.

Specifically, the network side device 10 may send the identifier of the target terminal to the core network control node 20 in the request message. The information that can uniquely identify the target terminal may also be sent to the core network control node 20 by other means. The core network control node 20 determines the corresponding target terminal, and sends a paging message to all base stations in the target terminal registration area for instructing the base station to page the target terminal.

The base station that receives the paging message will perform paging, and the base station that receives the response from the target terminal returns the corresponding location identifier to the core network control node 20.

The core network control node 20 transmits the location identifier to the network side device 10.

Since the paging process is not triggered by downlink data or downlink signaling, the target terminal will enter the idle state again due to the idleness of the wireless link for a certain period of time after responding to the connected state.

Since the paging process is not triggered by downlink data or downlink signaling, the location identifier of the terminal can be obtained without the user's perception.

Preferably, after receiving the request message, the core network control node 20 first determines whether it has the location identifier of the target terminal (for example, when the target terminal is in the connected state), and if so, directly returns the location identifier to the network side device. 10; Otherwise, perform a paging operation.

Since the core network control node 20 will page within all cells within the terminal's registered location area, this may result in a large amount of paging signaling and reduced system performance. In order to minimize this effect, the core network control node 20 can retrieve certain paging policies, including but not limited to one or more of the following strategies:

1. Paging strategy based on system load conditions (such as first selecting a cell with a load below the threshold for paging).

2. The paging method of the partition. The core network control node 20 divides the cells in the location area into a plurality of extents, and pages the paging area in the polling manner. If there is no response, a paging message is sent in other areas.

3. Priority paging method. The core network control node 20#^ is a certain strategy to classify the cells in the location area into different priorities, and the division strategy includes the hotspot area, the frequency of occurrence of the terminal based on statistics, and the like. The core network control node 20 may send a paging message from high to low or low to high in order of priority, and if there is no response, send a paging message in the next cell or cells.

If the application is in an LTE (Long Term Evolution) system, the core network control node 20 is an MME (Mobility Management Entity), and the location identifier is an ECGI (EUTRAN Cell Global Identity, EUTRAN cell) of the cell where the target terminal is located. Global Identity; EUTRAN, Evolved UMTS Terrestrial Radio Access Network, Evolved UMTS Terrestrial Radio Access Network; UMTS, Universal Mobile Telecommunication System, Universal Mobile Telecommunications System).

If the application is in a 3G system, the core network control node 20 is an SGSN (Serving GPRS Support Node; GPRS, General Packet Radio Service, General Packet Radio Service), and the location identifier is the RNC of the cell where the target terminal is located (Radio Network Controller, Radio Network Controller) and SAI (Serving Area Identity). The SA (Serving Area) is defined as an area composed of one or more cells belonging to the same LA.

If the application is in a 2G system, the core network control node is MSC (Mobile Switching Center, mobile switching). Heart), the location identifier is the Cell ID of the cell where the target terminal is located.

Further, in order to determine the location of the target terminal more accurately, the core network control node 20 sends a location request to the mobile location center after receiving the location identifier, and returns the received positioning result to the network side device 10.

If the application is in a 2G or 3G system, the mobile location center is in the RAN (Radio Access Network); if the application is in the LTE system, the mobile location center is E-SMLC (Evolved Serving Mobile Location Center). Mobile Location Center).

In the implementation, the network side device 10 may notify the core network control node 20 whether to obtain the positioning result; or the core network control node 20 itself may decide whether to obtain the positioning result.

The network side device 10 of the embodiment of the present invention may be a value-added service-related entity such as a commercial service platform or an information push platform; or may be a new network-side device.

Based on the same inventive concept, the embodiment of the present invention further provides a network side device, a core network control node, a network side device acquiring terminal location information, and a method for acquiring a terminal location information by a core network control node, because the devices and methods The principle of solving the problem is similar to the system for obtaining the location information of the terminal. Therefore, the implementation of these devices and methods can be referred to the implementation of the method, and the repeated description will not be repeated.

As shown in FIG. 2, the network side device of the embodiment of the present invention includes: a message sending module 100 and a first information receiving module.

110.

The message sending module 100 is configured to send a request message to the core network control node to indicate that the core network control node performs a paging operation when the location identifier of the target terminal needs to be obtained.

The first information receiving module 110 is configured to receive a location identifier from a core network control node.

As shown in FIG. 3, the core network control node of the embodiment of the present invention includes: a first paging operation module 200 and a response module.

210.

The first paging operation module 200 is configured to perform a paging operation after receiving the request message of the network side device, where the request message is sent by the network side device when the location identifier of the target terminal needs to be obtained.

The response module 210 is configured to send the received location identifier from the base station to the network side device.

The first paging operation module 200 performs a paging operation after receiving the request message of the network side device and determining that it does not have the location identifier of the target terminal.

After the first paging operation module 200 has the location identifier of the target terminal, the first paging operation module 200 sends the location identifier of the target terminal to the network side device.

After receiving the location identifier, the response module 210 sends a location request to the mobile location center, and returns the received positioning result to the network side device.

If the core network control node is used in the LTE system, the core network control node is the MME, and the location identifier is the ECGI of the cell where the target terminal is located;

If the core network control node is applied in the 3G system, the core network control node is the SGSN, and the location identifier is the target end. The identifier and SAI of the RNC of the cell where the terminal is located;

If the core network control node is used in the 2G system, the core network control node is the MSC, and the location identifier is the Cell ID of the cell where the target terminal is located.

As shown in FIG. 4, the method for acquiring the location information of the terminal by the network side device according to the embodiment of the present invention includes the following steps: Step 401: When the network side device needs to obtain the location identifier of the target terminal, the device sends a request message to the core network control node, where the request is sent. The message is used to instruct the core network control node to perform a paging operation.

Step 402: The network side device receives a location identifier from a control node of the core network.

In step 401, there are many reasons why the network side device 10 needs to obtain the location identifier of the target terminal. For example: A commercial platform needs to know the location of the terminal and push information, and the location of the target terminal by the criminal police.

In step 401, the network side device may send the identifier of the target terminal to the core network control node in the request message. The information that can uniquely identify the target terminal may be sent to the core network control node by using other methods.

As shown in FIG. 5, the method for acquiring the terminal location information by the control node of the core network in the embodiment of the present invention includes the following steps: Step 501: After receiving the request message of the network side device, the control node of the core network performs a paging operation, where the request message is The network side device sends when it needs to obtain the location identifier of the target terminal.

Step 502: The core network control node sends the received location identifier from the base station to the network side device.

In step 501, after receiving the request message, the core network control node needs to perform a paging operation even if there is no downlink data or downlink signaling.

In step 501, the core network control node determines the corresponding target terminal, and sends a paging message to all the base stations in the target terminal registration area for instructing the base station to page the target terminal. The base station that receives the paging message will perform paging, and the base station that receives the response from the target terminal returns the corresponding location identifier to the core network control node. In step 502, the core network control node sends the location identifier to the network side device.

Preferably, in step 501, after receiving the request message, the core network control node first determines whether it has the location identifier of the target terminal (for example, when the target terminal is in the connected state), and if so, directly returns the location identifier to Network side device; otherwise, perform paging operation.

Since the core network control node will page in all cells in the terminal registration location area, this may result in a large amount of paging signaling and reduced system performance. In order to minimize the impact, the core network control node can learn a certain paging policy. The specific paging policy is the same as the paging policy in FIG. 1 and will not be described here.

If the application is in the LTE system, the core network control node is the MME, and the location identifier is the ECGI of the cell where the target terminal is located. If the application is in a 3G system, the core network control node 20 is an SGSN, and the location identifier is an identifier and S AI of the RNC of the cell where the target terminal is located. The SA is defined as an area composed of one or more cells belonging to the same LA.

If the application is in a 2G system, the core network control node is the MSC, and the location identifier is the cell of the cell where the target terminal is located.

ID.

Further, in order to determine the location of the target terminal more accurately, in step 502, the core network control node sends a location request to the mobile location center after receiving the location identifier, and returns the received positioning result to the network side device.

If the application is in a 2G or 3G system, the mobile location center is in the RAN; if the application is in the LTE system, the mobile location center is E-SMLC.

In the implementation, the network side device may notify the core network control node whether to obtain the positioning result; or the core network control node itself may decide whether to obtain the positioning result.

4 and FIG. 5 can synthesize a process to form a new method for acquiring terminal location information, that is, step 401 is performed first, then steps 501 and 502 are performed, and finally step 402 is performed.

The following is an example of the application in the LTE system. The mode in the 2G system and the 3G system is similar to that of the LTE system, and is not described here.

As shown in FIG. 6, the method for obtaining a location identifier in an LTE system according to an embodiment of the present invention includes the following steps:

Step 601: The network side device sends a request message to the MME when the location identifier of the target terminal needs to be obtained. Step 602: The MME sends a paging message to all e Bs in the TA List registered by the target terminal.

Step 603: The eNB pages the target terminal.

Step 604: The target terminal initiates a service request process in response to the paging. The specific service request procedure can be found in the protocol 3GPP TS 23.401.

The MME may obtain the ECGI of the cell where the target terminal is located in the S1 AP (S1 Application Protocol) message returned by the eNB. The Initial UE Message included in the S1AP message includes the TAI and ECGI of the cell, and the area identifier and '〗, the area identifier ECGI.

Step 605: The MME returns the ECGI to the network side device.

As shown in FIG. 7, the method for obtaining location information in an LTE system according to an embodiment of the present invention includes the following steps:

Step 701: The network side device sends a request message to the MME when it is required to obtain the location identifier of the target terminal. Step 702: The MME sends a paging message to all eNBs in the TA List registered by the target terminal.

Step 703: The eNB pages the target terminal.

Step 704: The target terminal responds to the paging initiation service request process.

Step 705: The MME initiates a location request to the E-SMLC.

Step 706: The E-SMLC starts the positioning process.

The specific positioning process can be found in the protocol 3GPP TS 23.271.

Step 707: The E-SMLC returns a positioning result to the MME. Step 708: The MME returns the target terminal location information to the network side device.

The MME may send the positioning result together with the location identifier to the network side device in step 708. The positioning result and the location identifier may be separately sent to the network side device, and may be sent at any time after the location identifier can be obtained again.

In the above embodiment, the network side device and the core network control node are in different entities; the functions of the network side device and the functions of the core network control node may be combined in one entity as needed.

As shown in FIG. 8, the device for obtaining terminal location information in the embodiment of the present invention includes: a second paging operation module 80 and a second information receiving module 81.

The second paging operation module 80 is configured to perform a paging operation when the location identifier of the target terminal needs to be obtained.

The second information receiving module 81 is configured to receive a location identifier from the base station.

In the implementation, the second paging operation module 80 determines the target terminal, and sends a paging message to all the base stations in the target terminal registration area for instructing the base station to page the target terminal.

The base station that receives the paging message will perform paging, and the base station that receives the response from the target terminal returns the corresponding location identifier to the second information receiving module 81.

Preferably, when the location identifier of the target terminal needs to be obtained, the second paging operation module 80 first determines whether the location identifier of the target terminal is already present (for example, when the target terminal is in the connected state), and if so, directly determines the location. Identify; otherwise, perform a paging operation.

Since the second paging operation module 80 will page all cells in the terminal registration location area, this may result in a large amount of paging signaling and degrade system performance. In order to minimize the impact, the second paging operation module 80 can capture a certain paging policy. The specific paging policy is the same as the paging policy in FIG. 1 and will not be described here.

If the device in the embodiment of the present invention is applied to the LTE system, the device in the embodiment of the present invention is an MME, and the location identifier is an ECGI of a cell where the target terminal is located;

If the device in the embodiment of the present invention is applied to the 3G system, the device in the embodiment of the present invention is an SGSN, and the location identifier is an identifier and SAI of the RNC of the cell where the target terminal is located;

If the device in the embodiment of the present invention is applied to the 2G system, the device in the embodiment of the present invention is an MSC, and the location identifier is a cell ID of a cell where the target terminal is located.

Further, in order to determine the location of the target terminal more accurately, the second information receiving module 81 sends a positioning request to the mobile location center after receiving the location identifier, and receives the positioning result.

If the application is in a 2G or 3G system, the mobile location center is in the RAN; if the application is in the LTE system, the mobile bit The center is the E-SMLC.

Based on the same inventive concept, the embodiment of the present invention further provides a method for acquiring location information of a terminal. The principle of solving the problem is similar to the device method for obtaining location information of the terminal in FIG. 8. Therefore, the implementation of the method may refer to the device. The implementation, the repetition will not be repeated.

As shown in FIG. 9, the method for obtaining terminal location information in the embodiment of the present invention includes the following steps:

Step 901: Perform a paging operation when it is required to obtain a location identifier of the target terminal.

Step 902: Receive a location identifier from a base station.

In step 901, after the location identifier of the target terminal needs to be obtained, the target terminal is determined, and a paging message is sent to all base stations in the target terminal registration area for instructing the base station to page the target terminal.

Preferably, in step 901, when it is required to obtain the location identifier of the target terminal, it is first determined whether the location identifier of the target terminal is already present (for example, when the target terminal is in the connected state), and if so, directly determining the location identifier; otherwise , to perform paging operations.

Since paging will be performed in all cells in the location area of the terminal registration, this may result in a large amount of paging signaling and a decrease in system performance. In order to minimize this effect, a certain paging policy can be obtained. The specific paging policy is the same as the paging policy in FIG. 1 and will not be described here.

If the application is in the LTE system, the executor of the embodiment of the present invention is the MME, and the location identifier is the ECGI of the cell where the target terminal is located;

If the application is in a 3G system, the executor of the embodiment of the present invention is an SGSN, and the location identifier is an identifier and SAI of the RNC of the cell where the target terminal is located;

If the application is in the 2G system, the execution entity of the embodiment of the present invention is the MSC, and the location identifier is the Cell ID of the cell in which the target terminal is located.

Further, in order to determine the location of the target terminal more accurately, the step 902 may further include: sending a positioning request to the mobile location center, and receiving the positioning result.

The specific manner of combining the functions of the network side device and the function of the core network control node in one entity is similar to that of FIG. 7 and FIG. 8 in the embodiment of the present invention, and details are not described herein again.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention is directed to a flowchart of a method, apparatus (system), and computer program product in accordance with an embodiment of the present invention. And / or block diagram to describe. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

When the location identifier of the target terminal needs to be obtained, the paging operation is performed, and the location identifier of the terminal is obtained, so that the location of the idle state terminal at the cell granularity can be known in time, and the positioning efficiency is improved to shorten the time for knowing the idle terminal location.

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

A method for obtaining terminal location information, the method comprising:

When the network side device needs to obtain the location identifier of the target terminal, the device sends a request message to the core network control node, where the request message is used to instruct the core network control node to perform a paging operation;

2. The method according to claim 1, wherein the sending a request message to a core network control node is:

A request message is sent to the core network control node through the intermediate node.

3. A method for obtaining location information of a terminal, the method comprising:

The method according to claim 3, wherein, after receiving the request message, the core network control node further includes:

The core network control node determines that it does not have a location identifier of the target terminal.

5. The method of claim 4, wherein the method further comprises:

After the core network control node has the location identifier of the target terminal, the core network control node sends the location identifier of the target terminal to the network side device.

The method of claim 3, further comprising: after receiving the location identifier, the core network control node further includes:

The core network control node sends a location request to the mobile location center, and returns the received positioning result to the network side device.

7. The method of any of claims 3 to 6, wherein

The method is applied to a long term evolution LTE system, where the core network control node is a mobility management entity MME, and the location identifier is an evolved universal mobile communication system terrestrial radio access network cell global identifier ECGI of a cell where the target terminal is located; Or

The method is applied to a 3G system, where the core network control node is a serving general packet radio service support node SGSN, and the location identifier is an identifier of a radio network controller RNC and a service area identifier SAI of a cell where the target terminal is located; or

The method is applied to a 2G system, where the core network control node is a mobile switching center MSC, and the location identifier is a cell identifier Cell ID of a cell where the target terminal is located.

8. A system for obtaining terminal location information, characterized in that the system comprises: a network side device, configured to send a request message when receiving a location identifier of the target terminal, and receive the location identifier;

9. A device for obtaining location information of a terminal, the device comprising:

10. A device for obtaining location information of a terminal, the device comprising:

The device according to claim 10, wherein the first paging operation module is specifically configured to: after receiving a request message of the network side device, and determining that the location identifier of the target terminal is not present, Paging operation.

The device according to claim 11, wherein the first paging operation module is further configured to send the location identifier of the target terminal to the network side after the location identifier of the target terminal is device.

The device according to claim 10, wherein the response module is further configured to:

After receiving the location identifier, the location request is sent to the mobile location center, and the received positioning result is returned to the network side device.

14. Apparatus according to any of claims 10 to 13 wherein:

The device is applied in an LTE system, where the core network control node is an MME, and the location identifier is an ECGI of a cell where the target terminal is located; or

The device is applied to the 3G system, the core network control node is an SGSN, and the location identifier is an identifier and SAI of the RNC of the cell where the target terminal is located; or

The device is applied in a 2G system, the core network control node is an MSC, and the location identifier is a Cell ID of a cell in which the target terminal is located.

A method for obtaining terminal location information, the method comprising:

Receive location identification from the base station.

The method according to claim 15, wherein the method further includes: after the paging operation is performed after obtaining the location identifier of the target terminal;

Determine that there is no location identifier for the target terminal.

The method according to claim 15 or 16, wherein after receiving the location identifier, the method further comprises: sending a location request to the mobile location center, and receiving the location result.

18. A device for acquiring location information of a terminal, the device comprising:

The device according to claim 18, wherein the second paging operation module is specifically configured to: after obtaining a location identifier of the target terminal, and determining that the location identifier of the target terminal is not present, performing paging operating.

The device according to claim 18 or 19, wherein the second information receiving module is further configured to: after receiving the location identifier, send a positioning request to the mobile location center, and receive the positioning result.

21. Apparatus according to claim 18 or 19, wherein

The device is applied in an LTE system, where the device is an MME, and the location identifier is an ECGI of a cell where the target terminal is located; or

The device is applied to the 3G system, where the device is an SGSN, and the location identifier is an identifier and SAI of the RNC of the cell where the target terminal is located; or

The device is applied to the 2G system, the device is an MSC, and the location identifier is a Cell ID of a cell where the target terminal is located.