CN100428862C - Area trigger positioning method and device - Google Patents

Abstract

The invention discloses an area trigger positioning method, which includes: determining the positioning cycle interval in the initial stage of area trigger positioning; and adjusting the positioning cycle from this positioning to the next positioning according to the moving speed of the target terminal during the periodic positioning process interval; after the adjusted positioning cycle interval, start the next area trigger positioning process. The invention also discloses an area trigger positioning device, which includes: a positioning policy negotiation unit, a positioning calculation unit, a positioning result notification unit and a positioning cycle interval adjustment unit. The invention can effectively improve the positioning efficiency of the mobile terminal and save network resources.

Description

Area trigger positioning method and device

technical field

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

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 network-initiated positioning process is triggered, and if the trigger resides on the target terminal, the terminal-initiated positioning process 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 area-based trigger positioning is that the network or the terminal periodically detects whether the target terminal is in, enters or leaves a specific area, and if so, the trigger condition is met and the location report is triggered.

The network-initiated trigger location process is shown in Figure 1. Among them, steps h, j, and l are only executed when the trigger conditions of the area are met. After executing these steps, it will jump to the last step m to end the entire location process.

The trigger location process initiated by the terminal is shown in Figure 2: among them, steps d, f, and h are only executed when the trigger conditions of the area are met. After these steps are executed, it will jump to the last step i to end the entire location process.

Regardless of whether it is network-initiated or terminal-initiated area-triggered positioning, each complete positioning process is divided into an initial phase and a positioning session phase. The only difference between the trigger on the network side and the terminal side is the process of locating the session.

The trigger location process of the area where the trigger is located in the network is as follows: After receiving the area trigger positioning request initiated by the SUPL agent or the target terminal, the positioning server saves the area trigger condition locally, and starts periodic positioning according to the trigger start time on the positioning server . The positioning server periodically initiates multiple immediate positioning processes to the target terminal, each time after obtaining the precise position of the target terminal, it compares it with the target area specified in the trigger positioning task and the area trigger type (entering, leaving, inside), If the trigger condition is met, report the area trigger location report to the location initiator.

As shown in Figure 3, it is the location session process of the trigger on the network side:

When the positioning time is reached each time, the positioning server initiates a positioning session with the terminal, there are the following two situations:

1. Positioning request initiated by the network: When using the terminal-based positioning calculation method, if the auxiliary data does not need to be updated, the target terminal in the positioning session will send a SUPLREPORT message to the positioning server after the calculation is completed to notify the positioning result. This step is optional; when using the terminal-assisted positioning calculation method, the positioning server calculates the positioning result, and the positioning server judges whether the area trigger condition is satisfied, and if it is satisfied, the SUPL Agent is notified.

2. Positioning request initiated by the terminal: When the terminal-based positioning calculation method is adopted, if the auxiliary data does not need to be updated, the target terminal in the positioning session will send a SUPLREPORT message to the positioning server after the calculation is completed to notify the positioning result of this time. The first step is optional; when using the positioning calculation method based on terminal assistance, the positioning server calculates the positioning result and judges whether the area trigger condition is satisfied, and if it is satisfied, the SUPL Agent is notified.

The process of triggering location where the trigger is located in the terminal is as follows: After the target terminal receives the location triggering request initiated by the SUPL agent, it saves the location triggering condition locally. If the location is initiated by the network, it will notify the target of the location triggering task. terminal. The target terminal periodically initiates a positioning request to the positioning server according to the conditions set by the trigger. After obtaining the precise position result through interaction with the positioning server, it compares it with the locally saved target area and trigger type (entry, exit, internal) , if the trigger condition is met, the target terminal reports the area-triggered positioning report to the SUPL agent through the positioning server or reports the area-triggered positioning report to the internal location application.

As shown in Figure 4, it is the location session process of the trigger on the terminal side:

When the positioning time is reached each time, the terminal initiates a positioning session with the server, which can be divided into the following two situations:

1. Positioning request initiated by the network: When using the terminal-based positioning calculation method, if the auxiliary data does not need to be updated, the target terminal in the positioning session will send a SUPLREPORT message to the positioning server after the calculation is completed, notifying the end of this positioning. The first step is optional; when using the positioning calculation method based on terminal assistance, the server calculates the positioning result, and reports the positioning result to the target terminal through the SUPL REPORT message after calculation. Message notification location server area event trigger.

2. Positioning request initiated by the terminal: When using the terminal-based positioning calculation method, if the auxiliary data does not need to be updated, the target terminal in the positioning session will send a SUPLREPORT message to the positioning server after the calculation is completed, notifying the end of this positioning. This step is optional; when the terminal-based positioning calculation method is adopted, the server calculates the positioning result, and reports the positioning result to the target terminal through the SUPL REPORT message after the calculation. The target terminal judges whether the area trigger condition is satisfied, and if so, notifies the internal application.

In the above processes, for area-triggered positioning, the start time and end time of the positioning cycle may be determined by the initiator, and the positioning cycle interval is usually calculated or negotiated by the positioning server or terminal in the initial stage of area triggering Sure. Once the period is determined, it will not change until the positioning is completed or the specified area conditions are detected. However, if the target terminal is active in a small geographical range for a long time, or the target terminal is approaching the target area very slowly or quickly, and the distance that the target terminal moves within a positioning cycle interval is very long or very short, Using a fixed positioning period cannot effectively monitor the precise position of the target terminal. It can be seen that the existing periodic positioning of the target terminal is not intelligent enough, and the positioning of the target terminal is always triggered at the same positioning cycle interval from the beginning to the end of the positioning, which will also cause a large waste of network and terminal resources.

Contents of the invention

The purpose of the present invention is to provide an area-triggered positioning method to overcome the disadvantages in the prior art that the positioning of the target terminal is always triggered at the same positioning cycle interval from the beginning to the end of the positioning, resulting in waste of network and terminal resources, and to optimize the periodic positioning process, improve positioning efficiency, and save network and terminal resources.

Another object of the present invention is to provide an area-triggered positioning device to reduce the message processing process in the system, save system resources, and improve the positioning efficiency of the target terminal.

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

An area-triggered positioning method, the method comprising the following steps:

In the initial stage of area trigger positioning, determine the positioning cycle interval;

During the periodic positioning process, calculate the moving speed of the target terminal;

Obtain the moving distance L and moving direction of the target terminal in the previous positioning cycle interval according to the obtained moving speed of the target terminal;

Adjust the positioning cycle interval from this positioning to the next positioning according to the distance L and the moving direction;

After adjusting the positioning cycle interval, start the next area trigger positioning process.

In the initial stage of area-triggered positioning, the positioning server or the target terminal determines the positioning cycle interval according to the distance between the current position of the target terminal and the target area.

Optionally, the moving speed of the target terminal is obtained during positioning calculation.

Optionally, the moving speed of the target terminal is calculated according to the relative moving distance between the target terminal and a fixed target within a predetermined time.

Optionally, the moving speed of the target terminal is calculated according to the relative moving distance between the target terminal and the target area within a predetermined time.

Optionally, the moving speed of the target terminal is calculated according to the distance of the target terminal obtained in the previous two positioning processes.

The step of adjusting the positioning cycle interval from this positioning to the next positioning according to the distance L and the moving direction is specifically:

The positioning cycle interval from this positioning to the next positioning is determined according to the comparison result of the distance L and the accuracy of the positioning service quality required by the positioning requester and the moving direction of the target terminal.

If the moving direction of the target terminal deviates from the target area, increase the positioning cycle interval;

If the moving direction of the target terminal is towards the target area, and the distance L is greater than the accuracy requirement in the positioning quality of service required by the positioning initiator, then the positioning cycle interval is reduced.

If the moving direction of the target terminal is towards the target area, and the distance L is less than the accuracy requirement in the positioning quality of service required by the positioning initiator, then increase the positioning cycle interval.

The magnitude of increasing or reducing the positioning cycle interval is determined according to the difference between the distance L and the accuracy requirement in the positioning service quality required by the positioning initiator.

The step of adjusting the positioning cycle interval from this positioning to the next positioning according to the distance L and the moving direction is specifically:

According to the comparison result of the distance L and the relative distance S between the target terminal and the target area and the moving direction of the target terminal, the positioning cycle interval from this positioning to the next positioning is determined.

If the moving direction of the target terminal deviates from the target area, and the distance L is less than the relative distance S, then increase the positioning cycle interval;

If the moving direction of the target terminal is towards the target area, and the distance L is greater than or equal to the relative distance S, the positioning cycle interval is reduced.

The magnitude of increasing or decreasing the positioning cycle interval is determined according to the difference between the distance L and the relative distance S.

When the target terminal calculates the positioning cycle interval that needs to be adjusted and the trigger is on the network side, the target terminal notifies the positioning server of the adjusted positioning cycle interval through the secure user plane positioning initiation SUPL POS INIT message.

When the positioning server calculates the positioning cycle interval that needs to be adjusted and the trigger is on the terminal side, the target terminal is notified of the adjusted positioning cycle interval through the SUPL TRIGGERED INIT message triggered by the secure user plane positioning.

The positioning server is specifically:

The home location server of the target terminal or the visited location server of the target terminal in the roaming state.

An area trigger positioning device comprising:

The positioning policy negotiation unit is used to negotiate with the target terminal on the positioning method and the parameters used in the initial phase, and complete the negotiation process of triggering positioning;

a positioning calculation unit, configured to calculate the position of the target terminal according to the result negotiated by the positioning strategy protocol unit;

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

It is characterized in that the device also includes:

The positioning cycle interval adjustment unit is used to determine the positioning cycle interval from this positioning to the next positioning according to the moving speed of the target terminal, and trigger the positioning calculation unit to calculate the position of the target terminal after reaching the determined positioning cycle interval.

The positioning cycle interval adjustment unit includes:

a speed estimation subunit, used to estimate the moving speed of the target terminal;

The distance calculation subunit is used to calculate the distance L and direction of movement of the target terminal in the previous positioning cycle interval according to the moving speed of the target terminal obtained by the speed estimation subunit;

An adjustment decision subunit is configured to make an adjustment decision based on the distance L obtained by the distance calculation subunit.

The device further includes:

The relative distance calculation unit is connected with the adjustment decision-making subunit, and is used to calculate the relative distance S between the target terminal and the target area, and inform the adjustment decision-making subunit of the relative distance S, so that it can make it according to the distance L and the relative distance S The comparison result and the moving direction of the target terminal determine the positioning cycle interval from this positioning to the next positioning.

It can be seen from the above technical solutions provided by the present invention that the present invention adopts region-triggered location with a variable period for the triggered location process whether initiated by the terminal or by the network. In the initial stage of the region-triggered location, the location server or The target terminal determines the positioning period parameter; in the area-triggered positioning process, the positioning server or the target terminal adjusts the periodical interval of the periodic positioning according to the moving speed of the target terminal during the periodic positioning process. This periodic variable area trigger positioning method can determine the precise location of the target terminal in a more timely manner: it can effectively save network resources when the target terminal is moving slowly, and can determine the location of the target terminal in time when the target terminal is moving quickly. Accurate location, to determine whether it meets the trigger conditions. Utilizing the present invention can optimize the periodical positioning process in the triggered positioning process and obtain the position of the target terminal in time, so that the message processing process can be effectively reduced in certain application scenarios, the positioning efficiency can be improved, and network resources can be saved.

Description of drawings

FIG. 1 is a trigger location process initiated by a network in the prior art;

FIG. 2 is a trigger positioning process initiated by a terminal in the prior art;

Fig. 3 is the positioning session flow of the trigger on the network side in the prior art;

Fig. 4 is the positioning session process of the trigger on the terminal side in the prior art;

Fig. 5 is the realization flowchart of the inventive method;

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

Detailed ways

The core of the present invention is to adopt area-triggered positioning with a variable period. In the initial stage of area-triggered positioning, the positioning server or target terminal determines the positioning period parameters; during the process of area-triggered positioning, the positioning server or target terminal The periodic interval of periodic positioning is adjusted according to the moving speed of the target terminal; after the adjusted positioning periodic interval, the next area trigger positioning process is started. Specifically, in the initial stage of area-triggered positioning, the positioning cycle interval can be determined according to the distance between the current position of the target terminal and the target area; during the process of area-triggered positioning, when the target terminal slowly moves away from the target area, the positioning cycle interval; on the contrary, when the target terminal moves quickly towards the target area, the positioning cycle interval is appropriately reduced

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. 5, Fig. 5 has shown the implementation process of the method of the present invention, comprises the following steps:

Step 501: In the initial stage of area-triggered positioning, determine the positioning cycle interval.

Those skilled in the art know that whether the area-triggered positioning process is initiated by the network or the terminal, when the home positioning server of the target terminal receives the positioning request from the positioning requester, it needs to negotiate parameters such as the positioning method in the initial stage.

In the present invention, as required, parameters such as the starting time of the first positioning and the positioning cycle interval can be determined through negotiation between the positioning server and the target terminal at the initial stage; Trigger conditions are determined. In order to obtain a more optimal and reasonable start time for each positioning, the positioning server or the target terminal may determine the positioning cycle interval according to the distance between the current position of the target terminal and the target area.

Step 502: During the periodical positioning process, adjust the positioning cycle interval from this positioning to the next positioning according to the moving speed of the target terminal.

When periodic positioning is started, the first positioning process is completed. It has been mentioned in the prior art that area trigger positioning can be initiated by the network or by the terminal, and the trigger can be on the network side or on the terminal side, which is also applicable in the present invention.

With reference to the positioning session process of the trigger on the network side shown in Figure 3, the positioning server sends a SUPL TRIGGERED INIT (secure user plane trigger initiation) message to the target terminal to start the positioning session, and the target terminal responds to the positioning server with a SUPL POS INIT (secure user plane trigger initiation) message. face positioning start) message. When the positioning calculation method based on terminal assistance is adopted, the information of the cell where the target terminal is currently located (including mobile country code, mobile network code, location area code, cell identity, etc.) The current position of the target terminal, and judge whether the trigger condition of the area is met, and if it is satisfied, notify the SUPL agent; when the terminal-based positioning calculation method is adopted, the target terminal calculates its position and sends a SUPL REPORT (secure user plane report) message to the positioning server , to notify the result of this positioning.

Referring again to the positioning session process of the trigger on the terminal side shown in Figure 4, the target terminal sends a SUPL POS INIT message to the positioning server to start the positioning session. The current position of the terminal, after calculation, reports the positioning result to the target terminal through the SUPL REPORT message, and the target terminal judges whether the area trigger condition is satisfied, and if so, notifies the internal application; when using the terminal-based positioning calculation method, if the auxiliary data does not need to be updated, After calculating its position, the target terminal sends a SUPLREPORT message to the positioning server to notify the positioning result. If it is necessary to update the auxiliary data, the positioning calculation and notification process can be completed by using the message before the SUPLREPORT step.

Each positioning session process in the present invention is the same as above, only after the first positioning is completed, the position parameters of the target terminal need to be recorded, and after the positioning cycle interval agreed in the initial stage reaches the second cycle positioning time, the target terminal is estimated The moving speed of the terminal, and then calculate the distance L moved by the target terminal within one positioning cycle interval according to the moving speed. According to the distance L and whether the moving direction is towards the target area or away from the target area, it is decided to reduce or increase the next positioning cycle interval.

After the server or the target terminal obtains the second location result, if the result contains a speed parameter, the speed parameter can be used to calculate the distance L that the target terminal moves within a positioning cycle interval; if there is no speed parameter, then The moving speed of the target terminal can be estimated by:

(1) Calculate the moving speed of the target terminal according to the relative moving distance between the target terminal and a fixed target within a predetermined time. A time period can be set within a positioning cycle interval, and the distance between the target terminal and the known fixed target within this time period can be recorded respectively. According to the distance and the set time period, the target terminal within this time period can be obtained. The moving speed of is used as the estimated value of the moving speed of the target terminal within the positioning cycle interval. In particular, the distances between the target terminal and the known fixed target during the previous positioning and current positioning can be recorded respectively, and the distance L moved by the target terminal within a positioning cycle interval can be directly obtained according to these two distance values.

(2) Estimate the moving speed of the target terminal according to the position of the target terminal obtained in the previous two positioning processes. Similarly, the distance L moved by the target terminal within one positioning cycle interval can also be directly obtained according to the two positioning results.

(3) Calculate the moving speed of the target terminal according to the relative moving distance between the target terminal and the target area within a predetermined time. A time period can be set within a positioning cycle interval, and the distance between the target terminal and the target area within this time period can be recorded respectively, and the moving speed of the target terminal within this time period can be obtained according to the distance and the set time period , taking the velocity as an estimated value of the moving velocity of the target terminal within the positioning cycle interval. In particular, the distances between the target terminal and the target area during the previous positioning and this positioning can be recorded respectively, and the distance L moved by the target terminal within a positioning cycle interval can be directly obtained according to these two distance values.

If the target area is used as a reference point, then according to the change of the relative distance between the target terminal and the target area, it can be known whether the moving direction of the target terminal is away from the target area or towards the target area; if a known fixed target is used as a reference point, then It is also necessary to know the relative positional relationship between the fixed target and the target area, and determine whether the moving direction of the target terminal is away from the target area or towards the target area according to the relationship and the change of the relative distance between the target terminal and the fixed target.

When determining the moving direction of the target terminal, it can be determined in the following manner:

For example, take the measurement results of the earth coordinate system (WGS-84 geocentric coordinate system) in GPS (Global Positioning System) positioning technology as the reference system, and then convert it into a position in the local Gaussian plane Cartesian coordinate system. The connection line between the two periodic measurement positions can be used to obtain its relative direction to the coordinate axis in the coordinate system; in addition, the connection line between the last position and the target area and the connection line between the current position and the last position can also be used. The included angle determines the relative movement direction. If the angle between the direction of the line connecting the current position of the target terminal and the previous position and the line connecting the last position and the point in the target central area is greater than 90 degrees, it indicates that the target terminal is moving away from the target area; otherwise, if the current position of the target terminal is in line with If the angle between the direction of the line connecting the last position and the line connecting the last position and the point in the target central area is less than 90 degrees, it indicates that the target terminal is moving towards the target area.

Then, according to the moving distance L and moving direction of the target terminal, an adjustment strategy for the positioning cycle interval from this positioning to the next positioning is determined. Specifically, the following two adjustment strategies can be adopted:

(1) Determine the positioning cycle interval from this positioning to the next positioning according to the comparison result of the distance L and the accuracy of the positioning service quality required by the positioning requester and the moving direction of the target terminal:

If the moving direction of the target terminal deviates from the target area, increase the positioning cycle interval;

If the moving direction of the target terminal is towards the target area, and the distance L is greater than the accuracy requirement in the positioning service quality required by the positioning initiator, it indicates that the target terminal is rapidly approaching the target area within this period of time, and the positioning cycle interval can be reduced at this time. Increase positioning frequency.

If the moving direction of the target terminal is towards the target area, and the distance L is less than the accuracy requirement in the positioning quality of service required by the positioning initiator, it indicates that the target terminal moves slowly during this time period, and the positioning cycle interval is increased at this time.

The magnitude of increasing or reducing the positioning cycle interval may be determined according to the difference between the distance L and the accuracy requirement in the positioning service quality required by the positioning initiator.

(2) According to the comparison result of the distance L and the relative distance S between the target terminal and the target area and the moving direction of the target terminal, determine the positioning cycle interval from this positioning to the next positioning.

If the moving direction of the target terminal deviates from the target area, and the distance L is much smaller than the relative distance S, it indicates that the target terminal moves slowly during this period of time, and the positioning cycle interval can be increased at this time.

If the moving direction of the target terminal is towards the target area, and the distance L is greater than or equal to the relative distance S, it indicates that the target terminal is rapidly approaching the target area within this period of time. At this time, the positioning cycle interval can be reduced and the positioning frequency can be increased.

Likewise, the magnitude of the reduction or increase of the positioning cycle interval can be determined according to the difference between the distance L and the relative distance S.

Step 503: After the adjusted positioning cycle interval, start the next area trigger positioning process.

In the present invention, the positioning cycle interval that needs to be adjusted can be calculated by the target terminal, or the positioning cycle interval that needs to be adjusted can be calculated by the positioning server. When the function of the trigger condition and the calculation cycle interval are not in the same entity, it is necessary to notify the other party of the change of the positioning cycle.

If the positioning cycle interval to be adjusted is calculated by the target terminal, after the target terminal determines the positioning cycle interval to be adjusted, the SLPL POS INIT message may be used to notify the positioning server of the adjusted positioning cycle interval. For example, when the target terminal calculates the positioning cycle interval that needs to be adjusted, and the trigger is on the network side, the target terminal is required to notify the positioning server of the adjusted positioning cycle interval.

The existing SUPL POS INIT message is extended, and a parameter is extended to indicate the modified positioning cycle interval value of the target terminal. As shown in Table 1 below:

Table 1:

parameters optional state describe SET Capabilities m Terminal performance Requested o Request auxiliary data

Assistance Data Location ID m terminal cell information position o The location of the terminal SUPLPOS o Included SUPL POS message Ver cv In the case of network initiation, a SUPL INIT hash value calculated by the terminal is required Period Data o Modified cycle parameters

If the server calculates the positioning cycle interval that needs to be adjusted, after the server determines the positioning cycle interval that needs to be adjusted, it can use the SUPLTRIGGERED INIT message to notify the target terminal of the adjusted positioning cycle interval. For example, when the positioning server calculates the positioning cycle interval that needs to be adjusted, and the trigger is on the terminal side, the positioning server needs to notify the target terminal of the adjusted positioning cycle interval.

Similarly, the existing SUPL TRIGGERED INIT message can be extended, and a Period Data parameter can be extended to indicate the modified positioning period interval value of the target terminal.

The specific positioning method can use the positioning method of the cell identification, or GPS, EOTD (Enhanced Observed Time Difference, enhanced observed time difference) or OTDOA (Observed Time Difference of Arrival, observable time difference of arrival) and other positioning methods.

The target terminal can calculate its own position according to the valid auxiliary data (SET-Based mode), and return the position result to the positioning server; or the positioning server can calculate the position of the target terminal according to the received position measurement report.

In order to conveniently determine the start time of the first periodic positioning, the positioning server may convert the target area in the positioning request message sent by the positioning requester into a list of cells. For periodic positioning initiated by the network, in the positioning phase, the positioning server initiates a SUPLPOS INIT message to obtain the current cell information of the target terminal according to the secure user plane positioning sent by the target terminal; The cell list information of the cell list determines the start time of the first periodic positioning. For the periodic positioning initiated by the terminal, at the initial stage, the positioning server sends the cell list of the target area to the target terminal; then the target area determines the first periodic positioning according to the cell it is currently located in and the cell list information of the target area start time of .

It can be seen from the above description that when the target terminal moves faster or slower, it will move a long or short distance within a positioning cycle interval. The present invention adjusts the positioning cycle interval of the area-triggered positioning according to the moving speed of the target terminal . Appropriately reducing the positioning cycle interval when the target terminal is moving fast can determine the location of the target terminal in a more timely manner and determine whether it meets the trigger conditions; appropriately increasing the positioning cycle interval when the target terminal is moving at a low speed can effectively save network resources .

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 SUPL 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, 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 location request to its home SLP, and the H-SLP searches for routing information. If it is in a roaming state, it notifies the corresponding V-SLP. 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. 5 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 positioning calculation unit S2, a positioning result notification unit S3, and a positioning cycle interval adjustment unit S4.

In the initial stage of the periodic positioning process, the positioning strategy negotiating unit S1 negotiates with the target terminal on the positioning method and parameters used, and completes the negotiation process of triggering positioning. In the periodic positioning process initiated by the network, the positioning policy negotiation unit S1 sends a SUPL INIT (SUPL initialization) message to the target terminal to notify the trigger positioning; the target terminal responds to the SUPL TRIGGERED START (SUPL trigger start) message, and then the positioning policy negotiation unit S1 Reply SUPL TRIGGEREDRESPONSE (SUPL trigger response) message confirmation to the target terminal, and send a location 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 target terminal initiates the positioning process for itself. The target terminal sends a SUPL TRIGGEREDSTART (SUPL trigger start) message to the positioning strategy negotiation unit S1, and then the positioning strategy negotiation unit S1 replies to the target terminal with a SUPL TRIGGERED RESPONSE (SUPL trigger 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 calculation unit S2 calculates the position of the target terminal to complete the first positioning process. At the same time, the positioning cycle interval adjustment unit S4 determines the positioning cycle interval from this positioning to the next positioning according to the moving speed of the target terminal, and triggers the positioning calculation unit S2 to calculate the position of the target terminal after reaching the determined positioning cycle interval.

In order for the positioning cycle interval adjustment unit S4 to make correct decisions, a speed estimation subunit S41, a distance calculation subunit S42 and an adjustment decision subunit S43 can be set in this unit.

Wherein, the speed estimation subunit S41 is used for estimating the moving speed of the target terminal. As mentioned above in the description of the method of the present invention, the moving speed of the target terminal can be calculated according to the relative moving distance between the target terminal and a fixed target within a predetermined time, or according to the position estimation of the target terminal obtained in the previous two positioning processes The moving speed of the target terminal; the moving speed of the target terminal can also be calculated according to the relative moving distance between the target terminal and the target area within a predetermined time. I won't repeat them here.

After obtaining the moving speed of the target terminal, the distance calculation subunit S42 calculates the moving distance L of the target terminal in the previous positioning cycle interval according to the estimated speed value, and determines its moving direction. Then the adjustment decision subunit S43 makes an adjustment decision according to the distance L.

The adjustment decision-making subunit S43 can compare the distance L with the accuracy of the positioning service quality required by the positioning requester, and determine the positioning cycle interval from this positioning to the next positioning according to the comparison result and the moving direction of the target terminal: if the target terminal If the direction of movement deviates from the target area, and the distance L is less than the accuracy requirement in the positioning service quality required by the positioning requester, it indicates that the target terminal moves slowly during this time period. At this time, the positioning cycle interval can be increased, and the positioning cycle interval can be increased. The degree can be determined according to the moving speed of the terminal. If the moving direction of the target terminal is towards the target area, and the distance L is much greater than the accuracy requirement in the positioning quality of service required by the positioning initiator, it indicates that the target terminal is rapidly approaching the target area within this period of time, and the positioning cycle interval can be reduced at this time , increase the positioning frequency. Likewise, the reduction degree of the positioning cycle interval can be determined according to the moving speed of the terminal.

In addition, a relative distance calculation unit S5 can also be set in the device, as shown in FIG. 6 . The relative distance calculation unit S5 is connected with the adjustment decision-making subunit S43, and is used to calculate the relative distance S between the target terminal and the target area, and inform the adjustment decision-making subunit of the relative distance S, so that it can be adjusted according to the comparison result of the distance L and the relative distance S. and the moving direction of the target terminal to determine the positioning cycle interval from this positioning to the next positioning. If the moving direction of the target terminal deviates from the target area, and the distance L is much smaller than the relative distance S, it indicates that the target terminal moves slowly during this period. At this time, the positioning cycle interval can be increased, and the increase degree of the positioning cycle interval can be based on the terminal's Determine the speed of movement. If the moving direction of the target terminal is towards the target area, and the distance L is greater than or equal to the relative distance S, it indicates that the target terminal is rapidly approaching the target area within this period of time. At this time, the positioning cycle interval can be reduced and the positioning frequency can be increased. Likewise, the reduction degree of the positioning cycle interval can be determined according to the moving speed of the terminal.

After each periodic positioning is completed, the adjustment decision-making subunit S43 determines the next positioning cycle interval. After the interval, the adjustment decision subunit S43 triggers the positioning calculation unit S2 to calculate the position of the target terminal.

The device of the present invention can be integrated on the server. In the positioning phase, the positioned terminal notifies the device of its current location identifier through the SUPLPOS INIT message. In this way, after the positioning time is reached, the positioning calculation unit S2 can calculate the position of the target terminal, and judge whether the trigger condition is satisfied according to the trigger type specified in the area positioning trigger request. When the trigger condition is not satisfied, notify the positioning result notification unit S3 to end this positioning; when the trigger condition is met and the location of the target terminal is not required in the area positioning trigger request, notify the positioning result notification unit S3 directly to the positioning initiator Return the trigger location report; when the trigger condition is met and the location of the target terminal is required in the area location trigger request, the location result is obtained. Then, the location information of the target terminal is sent to the SUPL agent. At the same time, the positioning cycle interval adjustment unit S4 adjusts the positioning cycle interval according to the moving speed of the target terminal. If the SET-Based method is adopted, the positioning cycle interval adjustment unit S4 also needs to notify the target terminal of the adjusted positioning cycle interval, and then The target terminal calculates its own position according to the effective auxiliary data provided by the positioning calculation unit S2, and returns the result to the positioning calculation unit S2; The measurement report directly calculates the position of the target terminal.

The device of the present invention can also be integrated on the terminal, and the specific implementation is similar to the above description, which will not be repeated here.

In particular, different units in the device can also be distributed and integrated on the server and the terminal. For example, the positioning cycle interval adjustment unit S4 is integrated on the terminal, and other units are integrated on the server. In this way, the adjustment of each positioning cycle interval is completed by the target terminal. If the SET-Based method is adopted, the target terminal calculates its own position according to the effective auxiliary data provided by the positioning calculation unit S2; if the SET-Assisted method is adopted, the positioning cycle interval adjustment unit S4 also needs to adjust the adjusted positioning cycle The interval notifies the positioning server, and when the interval time arrives, the positioning calculation unit S2 directly calculates the position of the target terminal according to the received position measurement report of the target 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 (18)

1. A region-triggered positioning method, characterized in that the method comprises the following steps: In the initial stage of area trigger positioning, determine the positioning cycle interval; During the periodic positioning process, calculate the moving speed of the target terminal; Obtain the moving distance L and moving direction of the target terminal in the previous positioning cycle interval according to the obtained moving speed of the target terminal; Adjust the positioning cycle interval from this positioning to the next positioning according to the distance L and the moving direction; After adjusting the positioning cycle interval, start the next area trigger positioning process. 2. The method of claim 1, wherein: In the initial stage of area-triggered positioning, the positioning server or the target terminal determines the positioning cycle interval according to the distance between the current position of the target terminal and the target area. 3. The method according to claim 1, wherein the moving speed of the target terminal is calculated during positioning. 4. The method according to claim 1, wherein the moving speed of the target terminal is calculated according to the relative moving distance between the target terminal and a fixed target within a predetermined time. 5. The method according to claim 1, wherein the moving speed of the target terminal is calculated according to the relative moving distance between the target terminal and the target area within a predetermined time. 6. The method according to claim 1, wherein the moving speed of the target terminal is calculated according to the distance of the target terminal obtained in the previous two positioning processes. 7. The method according to claim 1, characterized in that, the step of adjusting the positioning cycle interval from the current positioning to the next positioning according to the distance L and the moving direction is specifically as follows: The positioning cycle interval from this positioning to the next positioning is determined according to the comparison result of the distance L and the accuracy of the positioning service quality required by the positioning requester and the moving direction of the target terminal. 8. The method of claim 7, wherein: If the moving direction of the target terminal deviates from the target area, increase the positioning cycle interval; If the moving direction of the target terminal is towards the target area, and the distance L is greater than the accuracy requirement in the positioning quality of service required by the positioning initiator, then the positioning cycle interval is reduced. If the moving direction of the target terminal is towards the target area, and the distance L is less than the accuracy requirement in the positioning quality of service required by the positioning initiator, then increase the positioning cycle interval. 9. The method of claim 8, wherein: The magnitude of increasing or reducing the positioning cycle interval is determined according to the difference between the distance L and the accuracy requirement in the positioning service quality required by the positioning initiator. 10. The method according to claim 1, characterized in that the step of adjusting the positioning cycle interval from this positioning to the next positioning according to the distance L and the moving direction is specifically: According to the comparison result of the distance L and the relative distance S between the target terminal and the target area and the moving direction of the target terminal, the positioning cycle interval from this positioning to the next positioning is determined. 11. The method of claim 10, wherein: If the moving direction of the target terminal deviates from the target area, and the distance L is less than the relative distance S, then increase the positioning cycle interval; If the moving direction of the target terminal is towards the target area, and the distance L is greater than or equal to the relative distance S, the positioning cycle interval is reduced. 12. The method of claim 11, wherein: The magnitude of increasing or decreasing the positioning cycle interval is determined according to the difference between the distance L and the relative distance S. 13. The method of claim 1, wherein: When the target terminal calculates the positioning cycle interval that needs to be adjusted and the trigger is on the network side, the target terminal notifies the positioning server of the adjusted positioning cycle interval through the secure user plane positioning initiation SUPL POS INIT message. 14. The method of claim 1, wherein: When the positioning server calculates the positioning cycle interval that needs to be adjusted and the trigger is on the terminal side, the target terminal is notified of the adjusted positioning cycle interval through the SUPL TRIGGERED INIT message triggered by the secure user plane positioning. 15. The method according to any one of claims 2 or 13 or 14, wherein the positioning server is specifically: The home location server of the target terminal or the visited location server of the target terminal in the roaming state. 16. An area trigger positioning device, comprising: The positioning policy negotiation unit is used to negotiate with the target terminal on the positioning method and the parameters used in the initial phase, and complete the negotiation process of triggering positioning; A positioning calculation unit, configured to calculate the position of the target terminal according to the result negotiated by the positioning strategy negotiation unit; a positioning result notification unit, configured to notify the positioning initiator of the positioning result obtained by the positioning negotiation calculation unit; It is characterized in that the device also includes: The positioning cycle interval adjustment unit is used to determine the positioning cycle interval from this positioning to the next positioning according to the moving speed of the target terminal, and trigger the positioning calculation unit to calculate the position of the target terminal after reaching the determined positioning cycle interval. 17. The device according to claim 16, wherein the positioning cycle interval adjustment unit comprises: a speed estimation subunit, used to estimate the moving speed of the target terminal; The distance calculation subunit is used to calculate the distance L and direction of movement of the target terminal in the previous positioning cycle interval according to the moving speed of the target terminal obtained by the speed estimation subunit; An adjustment decision subunit is configured to make an adjustment decision based on the distance L obtained by the distance calculation subunit. 18. The device of claim 17, further comprising: The relative distance calculation unit is connected with the adjustment decision-making subunit, and is used to calculate the relative distance S between the target terminal and the target area, and inform the adjustment decision-making subunit of the relative distance S, so that it can make it according to the distance L and the relative distance S The comparison result and the moving direction of the target terminal determine the positioning cycle interval from this positioning to the next positioning.

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