CN100417302C - Method and device for positioning mobile terminal - Google Patents

Abstract

The invention discloses a method for locating a mobile terminal, which includes: during the locating process, a locating server and a positioned terminal negotiate a locating method according to the positioning initiator's requirements for the locating service quality of the positioned terminal; after the locating time is reached, The positioning server obtains the positioning result by using the cell identification positioning method; when the positioning result obtained by using the cell identification positioning method does not meet the positioning service quality requirements of the positioning initiator for the positioned terminal, and the positioning method negotiated at the initial stage is not the cell identification positioning method, the positioning server obtains the positioning result according to the negotiated positioning method; the positioning server sends the positioning result that meets the positioning service quality requirements of the positioning initiator to the positioned terminal to the positioning initiator. The invention also discloses a device for positioning the mobile terminal. The invention can effectively improve the positioning efficiency of the mobile terminal and save network resources.

Description

Method and device for positioning mobile terminal

technical field

The present invention relates to the technical field of mobile location services based on user plane, in particular to a method and device for positioning a mobile terminal.

Background technique

SUPL (Secure User Plane Positioning) is a communication protocol that adopts the standard protocol of the user plane and allows the mobile phone user to interact with the positioning server to obtain the position of the mobile positioning terminal.

General real-time terminal positioning is divided into network-initiated positioning and terminal-initiated positioning: an initiator requesting positioning initiates positioning of another terminal through its client, which belongs to network-initiated positioning; initiating its own positioning belongs to terminal-initiated positioning . The processes are as follows:

When an initiator client requesting positioning initiates the positioning of another terminal through its MLS (Mobile Location Service) application, the H-SLP (Home Location Server) of the target terminal notifies the target terminal to start positioning. The session between the terminal and the H-SLP completes the location calculation of the target terminal, and finally notifies the MLS client of the calculation result to complete the positioning process; correspondingly, when the SUPL terminal initiates its own positioning, the terminal and its H-SLP -SLP sessions and end up with instant access to your location.

However, the triggered positioning process is different from the above-mentioned instant positioning process. When the client's MLS application initiates a trigger location for the target terminal, the trigger location condition resides in the target terminal's H-SLP or the target terminal, and when the trigger condition is met, the location session is triggered. If the trigger resides on the H-SLP, the location process triggered by the server is triggered, and if the trigger resides on the target terminal, the location process triggered by the terminal is triggered.

Periodic positioning is a kind of triggered positioning, which triggers the positioning of the target terminal at a certain time interval within a certain period of time, and the purpose is to know the position information of the target terminal within a certain period of time.

The periodic positioning process initiated by the network based on the positioning server and terminal trigger is shown in Figure 1:

The periodic positioning process initiated by the network is initiated by the MLS application at the other end of the network to periodically locate the target terminal. The positioning trigger is the periodic positioning triggered by the server on the network side, and the trigger is the period triggered by the terminal on the target terminal side. sexual positioning. The message flow in the initiation phase of the two is the same. After the SUPL Agent (SUPL agent) initiates a positioning request to the H-SLP of the target terminal, the H-SLP sends a SUPL INIT (SUPL initialization) message to the target terminal to notify the trigger positioning , the target terminal responds with a SUPL TRIGGERED START (SUPL triggered start) message, and then the H-SLP replies with a SUPLTRIGGERED RESPONSE (SUPL triggered response) message for confirmation. In this process, the negotiation of some parameters is completed, and then enters the following positioning process. In the periodic positioning process triggered by the server, after the trigger time is reached, the H-SLP initiates the process of locating the target terminal. The H-SLP and the target terminal obtain the position result of the target terminal through the positioning session, and then the H-SLP calculates the positioning result Report to SUPLAgent. After that, every certain positioning interval, the H-SLP initiates the process of locating the target terminal, and reports the result of the target terminal to the initiator. When the entire positioning period ends, the H-SLP sends a SUPLEND (SUPL end) message to notify the target terminal to end the entire positioning process. In the periodic positioning process triggered by the terminal, after the trigger time is reached, the target terminal initiates the positioning process of positioning itself, and obtains the position result of the target terminal through the positioning session between the target terminal and the H-SLP, and then the H-SLP reports the position result to the initiator. After that, every certain positioning interval, the target terminal initiates the positioning process of positioning itself, and the H-SLP reports the position result of the target terminal to the initiator. When the entire positioning period ends, the H-SLP sends a SUPL END message to notify the target terminal to end the entire positioning process. In the triggered positioning process initiated by the network, the positioning process of the trigger on the network side is roughly the same as that of the trigger on the terminal side, except that the positioning session process is different.

The periodic positioning process initiated by the terminal based on the positioning server and triggered by the terminal is shown in Figure 2:

The periodic positioning process initiated by the terminal itself is the positioning process initiated by the MLS application on the terminal. The trigger can be on the network side or the terminal side. The main difference between the two is the specific content of the positioning session (LOCATION SESSION). . The periodic positioning process is similar to the network-initiated positioning process, and the result of each positioning is reported to the MIS application on the terminal. When the entire positioning process is over, the terminal sends a SUPL END message to the H-SLP to notify the end of the triggered positioning process.

It can be seen from the above process that in the prior art, regardless of the QOP (Positioning Quality of Service) requirements of the initiator requesting the location of the target, periodic positioning must be based on the start time, end time, and positioning cycle of the cycle. Initiate the positioning process of the target terminal at intervals. Once the positioning method in the initial stage of positioning is determined, it will not be changed. In this way, when the target terminal moves from the original large cell to the microcell or picocell, and its position does not change much, it is unnecessary to use the initially agreed positioning method, and it is bound to waste a lot of resources to initiate frequent periodic positioning. resources of the network and terminal.

Area-based trigger positioning means that the network or terminal periodically detects whether the target terminal is in a specific area, and triggers the corresponding service when the trigger condition is met. Therefore, the positioning based on area trigger also has the same problems as the periodic positioning mentioned above.

Contents of the invention

The purpose of the present invention is to provide a method for locating a mobile terminal, so as to overcome the periodic positioning and area-based trigger positioning methods in the prior art. When the target terminal is located in a microcell or a picocell, using the originally agreed locating method will cause network problems. And the shortcomings of wasting terminal resources. Under the condition of meeting the QOP requirements, the message processing process is reduced, the positioning efficiency is improved, and the network and terminal resources are saved.

Another object of the present invention is to provide a device for locating a mobile terminal, so as to reduce the process of message processing in the system, save system resources, and improve the efficiency of locating the target terminal.

For this reason, the present invention provides following technical scheme:

A method for positioning a mobile terminal, the method comprising the following steps:

During the positioning process, the positioning server and the positioned terminal negotiate the positioning method according to the positioning service quality requirements of the positioning initiator for the positioned terminal;

After the positioning time is reached, the positioning server uses the cell identification positioning method to obtain the positioning result;

When the positioning result obtained by using the cell identification positioning method does not meet the positioning service quality requirements of the positioning initiator for the positioned terminal, and the positioning method negotiated in the initial stage is not the cell identification positioning method, the positioning server obtains the location according to the negotiated positioning method. positioning results;

The positioning server sends the positioning result satisfying the positioning service quality requirement of the positioning initiator to the positioned terminal to the positioning initiator.

During the positioning session, the positioning server initiates a SUPL POS INIT message according to the secure user plane positioning sent by the positioned terminal to obtain the information of the cell where the positioned terminal is located.

The method further comprises:

If the cell information of the positioned terminal obtained by the positioning server is the same as the cell information of the positioned terminal obtained during the last positioning session, and the last positioning result meets the positioning service quality requirements, the positioning server directly Send the last positioning result to the positioning initiator, and end this positioning.

The step of obtaining the positioning result by using the cell identification positioning method is specifically:

The identifier of the cell where the positioned terminal is currently located is mapped to geodetic physical coordinates or a service area identifier.

The positioning method negotiated between the positioning server and the positioned terminal is specifically: a terminal-assisted network-assisted global positioning system positioning A-GPS SET Assisted method, or a terminal-based network-assisted global positioning system positioning A-GPS SET Based method, cell Identifies the positioning method or other positioning methods supported by the terminal or server.

The positioning initiator is a network or a terminal.

The positioning process is triggered by the positioning server or by the terminal.

The positioning server is specifically:

The home positioning server of the positioned terminal or the visited positioning server of the positioned terminal in a roaming state.

A device for positioning a mobile terminal, comprising:

The positioning policy negotiation unit is used to negotiate the positioning method and parameters used with the positioned terminal at the initial stage, and complete the negotiation process of triggering positioning;

A negotiation positioning calculation unit, configured to calculate the position of the positioned terminal according to the negotiation result of the positioning strategy negotiation unit;

a positioning result notification unit, configured to notify the positioning initiator of the positioning result obtained by the negotiated positioning calculation unit;

The device also includes:

A cell identity positioning calculation unit, configured to calculate the position of the positioned terminal according to the cell identity information;

A positioning result judging unit, configured to judge whether the positioning result obtained by the cell identity positioning calculation unit meets the positioning service quality requirements of the positioning initiator;

The positioning policy control unit is respectively connected to the negotiation positioning calculation unit and the cell identification positioning calculation unit, and is used to notify the cell identification positioning calculation unit to perform positioning calculation when the positioning time is reached, and the positioning result judgment unit When it is judged that the positioning result obtained by the cell identity positioning calculation unit does not meet the positioning service quality requirements of the positioning initiator, and the positioning method negotiated by the positioning strategy negotiating unit in the initial stage is not a cell identity positioning method, notify the negotiated positioning calculation unit unit for positioning calculations.

The device further includes:

The storage unit is connected to the positioning strategy negotiation unit, and is used to obtain and store cell identification information, store the calculation results of the cell identification positioning calculation unit, and compare the cell identification information acquired during this positioning session with the previous acquisition The cell identification information is compared, and the comparison result is sent to the positioning strategy control unit.

It can be seen from the technical solution provided by the present invention above that, for the trigger positioning process whether initiated by the terminal or initiated by the network, the positioning server preferentially adopts the cell ID positioning method, and obtains the target terminal according to the cellular information reported by the target terminal. positioning results. In this way, when the positioning result satisfies the QOP requirement of the initiator, the positioning method agreed in advance can no longer be performed, and the positioning result obtained according to the cell ID positioning method is transmitted to the initiator, and this positioning process ends. Since the cell ID positioning method is simpler to implement than other positioning methods, the present invention can effectively reduce the message interaction process in the positioning process, improve positioning efficiency, and save network and terminal resources. Especially when the cell information reported by the target terminal remains unchanged, and the positioning result obtained by using the cell ID method in the previous cycle meets the QOP requirements, the positioning server may not perform a series of calculations related to positioning in this cycle, but The positioning result obtained by using the cell ID method in one period is directly transmitted to the initiator, which can greatly improve the positioning efficiency.

Description of drawings

Figure 1 is a periodic positioning process initiated by the network based on the positioning server and terminal triggering;

Figure 2 is a periodic positioning process initiated by a terminal based on a positioning server and triggered by a terminal;

Fig. 3 is the realization flowchart of the inventive method;

Fig. 4 is the positioning session process of the trigger on the terminal side in the present invention;

Fig. 5 is the positioning session process of the trigger on the network side in the present invention;

Fig. 6 is a functional block diagram of the device of the present invention.

Detailed ways

The core of the present invention is to use the advantages of simple implementation of cell identification positioning and fast system processing speed. For the trigger positioning process, in the initial stage, the positioning server and the positioned terminal negotiate the positioning method and the parameters used to complete the negotiation process of trigger positioning ; In the positioning phase, after the positioning time is reached, regardless of whether the positioning method negotiated between the positioning server and the positioned terminal is the cell identification positioning method, the positioning server will preferentially use the cell identification positioning method to obtain the positioning result; if the positioning result meets the positioning initiation If the positioning service quality requirements of the positioning initiator for the positioned terminal are met, the current positioning will be terminated, and if necessary, the positioning result will be transmitted to the positioning initiator; if the positioning result does not meet the positioning service quality requirements of the positioning initiator for the positioned terminal, and If the positioning method negotiated in the initial stage is not the cell identification positioning method, the positioning server then obtains the positioning result according to the negotiated positioning method, and ends this positioning; if necessary, transmits the positioning result to the positioning initiator.

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

With reference to Fig. 3, Fig. 3 has shown the implementation process of the method of the present invention, comprises the following steps:

Step 301: The positioning server and the positioned terminal negotiate a positioning method according to the positioning service quality requirements of the positioning initiator for the positioned terminal.

The periodic positioning process initiated by the network is initiated by the MLS application at the other end of the network to periodically locate the positioned terminal. When the positioning trigger is on the network side, the positioning server triggers periodic positioning, and on the terminal side, the trigger is periodic positioning triggered by the terminal. The message flow in the initial stage of the two is the same. After the SUPL Agent initiates a positioning request to the home location server of the located terminal, the home location server sends a SUPL INIT (SUPL initialization) message to the located terminal to notify the location trigger; The positioning terminal responds with a SUPL TRIGGERED START (SUPL triggered start) message, and then the home positioning server of the located terminal replies with a SUPL TRIGGEREDRESPONSE (SUPL triggered response) message confirmation to the located terminal, and sends a positioning confirmation message to the SUPL Agent at the same time. In this process, the negotiation of some parameters (for example, positioning method, etc.) is completed, and then enters into the following positioning process.

In the periodic positioning process initiated by the terminal, the MLS application on the positioned terminal initiates the positioning process for itself. When the positioning trigger is on the network side, the positioning server triggers periodic positioning, and on the terminal side, the trigger is periodic positioning triggered by the terminal. The message flow in the initial stage of the two is the same. The positioned terminal sends a SUPL TRIGGERED START (SUPL triggered start) message to its home positioning server, and then the home positioning server of the positioned terminal replies SUPLTRIGGERED RESPONSE (SUPL triggered start) message to the positioned terminal. Response) message acknowledgment. In this process, the negotiation of some parameters is completed, and then enters the following positioning process.

Those skilled in the art know that there are multiple positioning methods in the prior art, such as A-GPS SETAssisted (terminal-assisted network-assisted global positioning system positioning method), A-GPS SET Based (network-assisted global positioning system based on terminal calculation) system positioning method), cell identification positioning method, and other positioning methods supported by the network and terminal, etc.

Among them, the CELL-ID method simply takes the identification of the cell where the terminal is currently located as the positioning result, maps this identification into geodetic physical coordinates or service area identification, and sends it to the positioning client through the core network. Generally, when the positioning request does not require high precision but requires a fast response time, it is more appropriate to use the Cell-ID method. The positioning accuracy of this positioning method depends on the size of the cell and whether auxiliary positioning measurement is used.

The principle of A-GPS (Network-Assisted Global Positioning System) positioning is to locate the mobile station by measuring the propagation delay of the signal. In GPS positioning, what the mobile station receives is the GPS signal transmitted by the GPS satellite.

When the positioning server receives the positioning request, the positioning server obtains GPS assistance information through a continuously running GPS reference receiver network (the network can clearly receive signals from GPS satellites), and calculates corresponding assistance data. Then the positioning server transmits these GPS auxiliary data to the positioned terminal, and the GPS receiver of the positioned terminal receives and captures GPS satellite signals with the help of the auxiliary data, and completes the corresponding pseudo-range measurement. The so-called pseudo-range here refers to the measured distance between the terminal and the satellite. The distance measurement value contains various errors, including satellite clock bias, ionospheric delay error, tropospheric delay error, and receiver clock bias, etc. .

A-GPS positioning is divided into two positioning modes: SET-Assisted and SET-Based. If it is A-GPSSET-Assisted positioning, the positioned terminal will report the pseudo-range measurement result to the positioning server, and the positioning server will complete the position estimation; if it is A-GPS SET-Based positioning, the positioned terminal will complete the position calculation according to the pseudo-range measurement results, and then report the calculated terminal position information to the positioning server.

The positioning method determined through negotiation between the positioning server and the positioned terminal may be any one of the above except A-GPSSET-Based, and of course other positioning methods may also be used.

Step 302: After the positioning time is reached, the positioning server obtains the positioning result by using the cell identification positioning method.

During the positioning session, the positioning server obtains the information of the cell where the positioned terminal is located according to the SUPL POS INIT (SUPL POS INIT) message sent by the positioned terminal.

Those skilled in the art know that when the trigger is on the positioned terminal, other positioning method processes except A-GPS SET-Based all start a SUPL POS INIT message, which carries the information of the cell where the positioned terminal is located, Based on these information, the positioning server maps the identifier of the cell where the terminal to be positioned is currently located to the physical coordinates of the earth or the identifier of the service area to obtain the positioning result.

When the trigger is on the network side, the home location server of the positioned terminal first sends a SUPL TRIGGER (SUPL trigger) message to the positioned terminal. In the process of positioning methods other than A-GPS SET-Based, the positioned terminal Send back a SUPL POS INIT message, which carries the information of the cell where the positioned terminal is located, and the positioning server can use the cell identification positioning method to obtain the positioning result according to the information.

Step 303: Judging whether the positioning result obtained according to the cell identification positioning method satisfies the positioning service quality requirement of the positioning initiator for the positioned terminal.

The positioning initiator will give the QOP requirements when sending the positioning service request, which includes: accuracy, uncertainty, valid time, etc. When the positioning server or terminal calculates the position result, the result data will include the corresponding accuracy, survival time, etc. Time and other parameters can be compared to determine whether the QOP requirements are met.

If so, proceed to step 307: the positioning server sends the obtained positioning result (using the cell identification positioning method) to the positioning initiator.

If not, proceed to step 304: the positioning server further judges whether the positioning method negotiated at the initial stage is a cell identity positioning method.

If yes, go to step 308: the positioning server returns a positioning failure notification to the positioning initiator.

Then, go to step 309: end this positioning process.

If not, go to step 305: the positioning server obtains the positioning result according to the negotiated positioning method.

Step 306: Determine whether the positioning result obtained according to the negotiated positioning method satisfies the positioning service quality requirement of the positioning initiator for the positioned terminal.

If so, go to step 307: the positioning server sends the obtained positioning result (using the negotiated positioning method) to the positioning initiator.

Then, go to step 309: end this positioning process.

In the positioning stage, the positioning server and the positioned terminal periodically conduct a positioning session process to complete each positioning calculation. When the last positioning calculation ends or the area positioning conditions are met, the positioning server sends a SUPL END message to notify the positioning initiator that the entire positioning process is over.

Regardless of the triggered positioning process initiated by the network or the triggered positioning process initiated by the terminal, the positioning process of the trigger on the network side is roughly the same as that on the terminal side, except that the positioning session process is different.

In the present invention, the positioning session process of the trigger on the terminal side is shown in Figure 4:

a. When the time for positioning arrives, the target terminal sends a SUPL POS INIT message to the positioning server to notify the positioning server to initiate a positioning session.

b. The positioning server uses the cell identification positioning method to determine the location of the target terminal according to the information of its cell contained in the SUPL POS INIT sent by the target terminal. If the location result meets the QOP requirements of the initiator, it sends SUPL to the target terminal REPORT notification, this positioning is over. If not satisfied, go to c.

c. The positioning server and the target terminal exchange SUPL POS messages using the previously agreed upon positioning method.

d. If it is a positioning request initiated by the terminal, after the positioning server calculates and obtains the positioning result, send a SUPL REPORT message to inform the target terminal and end this positioning.

e. If the A-GPS positioning method based on terminal calculation is adopted, the above steps are not performed when the auxiliary data does not need to be updated. After the target terminal calculates the result, if it is a positioning request initiated by the network, the target terminal sends a SUPL REPORT message Report the positioning result to the server and end the session. If it is a positioning request initiated by the terminal, the target terminal sends a SUPL REPORT message to the server to end this positioning.

In the present invention, the location session process of the trigger on the network side is shown in Figure 5:

a. When the positioning time arrives, the positioning server sends a SUPL TRIGGER message to the target terminal to notify the start of the positioning session.

b. The target terminal sends a SUPL POS INIT message response to the positioning server, and the message contains the capabilities of the target terminal and the information of the current cell.

c. The positioning server uses the cell identification positioning method to determine the position of the target terminal according to the information of its cell contained in the SUPL POS INIT sent by the target terminal. If the location result meets the QOP requirement of the positioning initiator, a SUPL REPORT notification is sent to the target terminal, and the positioning ends. If not satisfied, go to d.

d. The positioning server and the target terminal exchange SUPL POS messages using the previously agreed upon positioning method.

e. If it is a positioning request initiated by the terminal, after the positioning server calculates and obtains the positioning result, send a SUPL REPORT message to inform the target terminal and end this positioning.

f. If the positioning method based on terminal calculation A-GPS is adopted, when the auxiliary data does not need to be updated, the above steps are not performed. After the target terminal calculates the result, if it is a positioning request initiated by the network, the target terminal sends a SUPL REPORT message Given a location server, report the location result and end the session. If it is a positioning request initiated by the terminal, the target terminal sends a SUPL REPORT message to the server to end this positioning.

Because the cell identification positioning method is simple to implement, and when the activity range of the positioned terminal is within the coverage of a certain cell, the positioning result obtained by using the cell identification information will not change. Therefore, in order to further improve positioning efficiency, at the beginning of each positioning session, the positioning server may first check the cell identity reported by the positioned terminal after receiving the SUPL POS INIT message sent by the positioned terminal during the positioning session. Whether the cell ID reported in the last positioning session is the same, if it is the same, it means that the positioned terminal is still in the area covered by the original cell, and then check whether the positioning result obtained by using the cell ID positioning method in the last positioning calculation satisfies the requirements of the positioning initiator. QOP requirements, if these two conditions are met, the positioning server can directly report the last positioning result to the positioning initiator, and if necessary, send SUPL REPORT to the positioned terminal at the same time, ending the positioning process.

It can be seen that when the target terminal is active in a densely populated urban area, the target terminal is often located in a microcell or a picocell, and the positioning accuracy of the cell positioning technology can meet the requirements most of the time. By using the invention, the positioning efficiency can be greatly improved and network resources can be saved.

When using the A-GPS SET Based positioning method, if there is no need to update the auxiliary data, the terminal directly uses the original auxiliary data to calculate the position result, and does not need to perform the process of first using the cell identification positioning method to calculate.

Due to the mobility of the target terminal, when the target terminal is in a roaming state, the above process needs to be completed jointly by the target terminal's H-SLP (Home Location Server) and V-SLP (Visitor Location Server). In the case of network initiation, the client agent initiates a location request to the R-SLP (Request Location Server), the R-SLP finds the H-SLP of the target terminal, and the H-SLP checks whether the target terminal is roaming. If it is in the roaming state, Then notify the corresponding V-SLP, and determine the location method and other parameters through session negotiation between the V-SLP, H-SLP and the target terminal, and trigger the positioning of the target terminal when the trigger condition is met. When the positioning period ends or the area condition is satisfied, the whole positioning process ends. When initiated by the terminal, the terminal initiates a positioning request to its home SLP, and the H-SLP searches for routing information. If it is in the roaming state, it notifies the corresponding V-SLP, and through the communication between V-SLP, H-SLP and the target terminal The session negotiation determines the positioning method and other parameters, and triggers the positioning of the target terminal when the trigger condition is met. When the positioning period ends or the area condition is satisfied, the whole positioning process ends.

Each positioning process can be completed by the H-SLP or by the V-SLP. The specific implementation process is similar to that shown in FIG. 3 and will not be repeated here.

With reference to Fig. 6, Fig. 6 is the functional block diagram of device of the present invention:

The device includes: a positioning strategy negotiation unit S1, a negotiated positioning calculation unit S2, a positioning result notification unit S3, a cell identification positioning calculation unit S4, a positioning result judgment unit S5, and a positioning strategy control unit S6.

The working process of this device is as follows:

In the initial stage of the periodic positioning process, the positioning strategy negotiating unit S1 negotiates with the positioned terminal on the positioning method and parameters used to complete the negotiation process of triggering positioning. In the periodic positioning process initiated by the network, the positioning strategy negotiation unit S1 sends a SUPL INIT (SUPL initialization) message to the positioned terminal to notify the triggered positioning; the positioned terminal responds to the SUPL TRIGGERED START (SUPL trigger start) message, and then the positioning strategy negotiation Unit S1 replies SUPL TRIGGEREDRESPONSE (SUPL trigger response) message confirmation to the located terminal, and sends a positioning confirmation message to SUPL Agent at the same time. In this process, the negotiation of some parameters (for example, positioning method, etc.) is completed, and then enters into the following positioning process. In the periodic positioning process initiated by the terminal, the MLS application on the positioned terminal initiates the positioning process for itself. The positioned terminal sends a SUPLTRIGGERED START (SUPL trigger start) message to the positioning strategy negotiation unit S1, and then the positioning strategy negotiation unit S1 replies to the positioned terminal with a SUPL TRIGGERED RESPONSE (SUPL triggered response) message confirmation. In this process, the negotiation of some parameters is completed, and then enters the following positioning process.

After the negotiation process of triggering positioning is completed, when the positioning time is reached, the positioning policy control unit S6 notifies the cell identification positioning calculation unit S4 to obtain the positioning result by using the cell identification positioning method, and the positioning result judgment unit S5 judges whether the result meets the requirements of the positioning initiator. If the QOP requirements are met, the positioning result information will be sent to the positioning initiator through the positioning result notification unit S3; if not satisfied, the positioning result judgment unit S5 will notify the positioning strategy control unit S6 to re-perform the positioning decision. The positioning policy control unit S6 makes a decision according to the positioning method negotiated in the initial stage. If the positioning method negotiated in the initial stage is the cell identification positioning method, the device is notified to end the positioning process; if other positioning methods are negotiated in the initial stage, then Notify the negotiated positioning calculation unit S2 to perform related calculations according to the negotiated positioning method, obtain the positioning result, and send the positioning result to the positioning initiator through the positioning result notification unit S3 to complete the positioning process.

In order to further improve the positioning efficiency, a storage unit S7 for obtaining and storing cell identification information and storing the calculation results of the cell identification positioning calculation unit can also be set in the device of the present invention, as shown in Figure 6:

Because the cell identification positioning method is simple to implement, and when the activity range of the positioned terminal is within the coverage of a certain cell, the positioning result obtained by using the cell identification information will not change. Therefore, after the cell identity positioning calculation unit S4 obtains the positioning result that meets the QOP requirements of the positioning initiator, the positioning result judgment unit S5 returns a notification to the cell identity positioning calculation unit, and after receiving the notification, the cell identity positioning calculation unit S4 uses the positioning result Stored in storage unit S7. After the next positioning cycle starts, the positioning strategy control unit S6 first checks the cell identity and the upper bound reported by the positioned terminal according to the SUPL POS INIT message sent by the positioned terminal during the positioning session received by the positioning strategy negotiation unit S1. Whether the cell IDs reported during the second positioning session are the same, if they are the same, it means that the positioned terminal is still in the area covered by the original cell. If there is a positioning result required by the initiator's QOP, the cell identity positioning calculation unit S4 is notified to directly send the result to the positioning initiator through the positioning result notification unit S3, and this positioning process ends.

In actual use, the device needs to be integrated on the server and/or the terminal to realize the positioning of the mobile terminal.

While the invention has been described by way of example, those skilled in the art will appreciate that there are many variations and changes to the invention without departing from the spirit of the invention, and it is intended that the appended claims cover such variations and changes without departing from the spirit of the invention.

Claims (10)

1. the method that portable terminal is positioned is characterized in that, said method comprising the steps of:

In position fixing process, the location-server and the terminal that is positioned are consulted localization method according to the location initiator to the location quality of service requirement of the terminal that is positioned;

Arrive the location after the moment, location-server utilizes cell-ID positioning method to obtain positioning result;

When the described positioning result that utilizes cell-ID positioning method to obtain does not satisfy the location quality of service requirement of location initiator to the terminal that is positioned, and when the localization method of consulting in the starting stage was not cell-ID positioning method, location-server obtained positioning result according to the localization method of consulting;

Location-server will satisfy the positioning result that the location initiator requires the location quality of service of the terminal that is positioned and send to the location initiator.

2. method according to claim 1 is characterized in that,

In the location sessions process, the secure user plane location that location-server sends according to the terminal that is positioned is initiated SUPL POS INIT message and is obtained the cell information at the terminal place that is positioned.

3. method according to claim 2 is characterized in that, described method further comprises:

If the cell information at the terminal place that is positioned that described location-server obtains is identical with the cell information at the terminal place that is positioned that obtained in the location sessions process last time, and when the positioning result of last time satisfied the location quality of service requirement, described location-server directly sent to the location initiator with the positioning result of last time.

4. method according to claim 2 is characterized in that, the step of utilizing cell-ID positioning method to obtain positioning result is specially:

The sign of sub-district, the current place of the described terminal that is positioned is mapped to the earth physical coordinates or Service Area Identifier.

5. method according to claim 1, it is characterized in that the localization method that the described location-server and the terminal that is positioned are consulted is specially: property of network auxiliary global positioning system location A-GPSSET Assisted method that terminal is auxiliary or the localization method of supporting based on property of network auxiliary global positioning system location A-GPSSET Based method, cell-ID positioning method or other-end or the server of terminal calculating.

6. method according to claim 1 is characterized in that, described location initiator is network or terminal.

7. method according to claim 1 is characterized in that, described position fixing process is triggered by described location-server or triggered by terminal.

8. method according to claim 1 is characterized in that, described location-server is specially:

The ownership location-server of the described terminal that is positioned or the described visit location-server of terminal when roaming state that be positioned.

9. device that portable terminal is positioned comprises:

The positioning strategy negotiation element is used for finishing the negotiations process of triggered location in the starting stage and the parameter of terminal in starting stage negotiation localization method and use that be positioned;

Consult the location Calculation unit, be used for the result according to described positioning strategy negotiation element negotiation, terminal is carried out position calculation to being positioned;

The positioning result notification unit is used for the positioning result that described negotiation location Calculation unit obtains is notified to the location initiator;

It is characterized in that described device also comprises:

Cell ID location Calculation unit is used for according to cell identity information the terminal that is positioned being carried out position calculation;

The positioning result decision unit is used to judge that described cell ID location Calculation unit obtains the location quality of service requirement whether positioning result satisfies the location initiator;

The positioning strategy control unit, be connected to described negotiation location Calculation unit and described cell ID location Calculation unit, be used for arriving the location during moment, notify described cell ID location Calculation unit to position calculating, when described positioning result decision unit judges that the satisfied location initiator's of positioning result that described cell ID location Calculation unit obtains the localization method that location quality of service requires and described positioning strategy negotiation element was consulted in the starting stage is not cell-ID positioning method, notify described negotiation location Calculation unit to position calculating.

10. device according to claim 9 is characterized in that, described device further comprises:

Memory cell, link to each other with described positioning strategy negotiation element, be used to obtain and store the result of calculation of cell identity information, the described cell ID location Calculation of storage unit, and cell identity information and the preceding cell identity information of obtaining in this location sessions process of once obtaining compared, send comparative result to described positioning strategy control unit.

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