CN100409719C - Implementation Method of Tracking and Positioning Service in Mobile Communication System - Google Patents

Abstract

The invention discloses a method for realizing the tracking and positioning service in a mobile communication system: CN sends a positioning request message to RNC to request the tracking and positioning service of a certain user; after receiving the request message, the RNC recognizes that it is a request for the tracking and positioning service , sending a positioning measurement control message to the corresponding UE, requiring it to perform tracking and positioning service measurement according to the specified positioning type; after receiving the measurement control message, the UE determines the period of tracking and positioning, performs positioning processing every other period, and Report the result to the RNC; each time the RNC receives the report from the UE, it obtains the location information of the UE, and reports it to the core network as a positioning result. The method of the invention can realize the tracking and positioning service simply and respond quickly.

Description

Implementation Method of Tracking and Positioning Service in Mobile Communication System

technical field

The present invention relates to the positioning service in the mobile communication system, more specifically, to the method for realizing the tracking and positioning service in the system.

Background technique

Mobile positioning services in wireless network systems are receiving more and more attention. The main applications of mobile positioning services include: emergency call positioning services for user safety; tracking and positioning applications; personal positioning services (such as traffic, accommodation and other service industry information inquiries); intelligent transportation positioning; wireless network system design and Resource management; billing for wireless network systems (determining the communication cost of certain locations according to the call rate), etc. The tracking and positioning service is used for navigation applications in which users independently query their own locations, such as navigation and positioning when traveling in different places or applications that periodically track the location of the elderly and children, and applications that track and locate criminal objects in emergencies. The tracking service described in the present invention may be a real-time tracking navigation positioning service, or a non-real-time tracking periodic positioning service.

There are usually two types of positioning implementations in the wireless network system: one is that the mobile user independently determines the geographical position through the measurement of the wireless signal and the information of the base stations of the surrounding cells (that is, based on the situation of the UE (User Equipment)), and then reports it to the network. side. One type is that the network side of the wireless network finally determines the geographical location of the mobile user through the measurement of the wireless signal and the base station information of the surrounding cells (that is, the case of UE assistance).

The 3rd Generation Partnership Project organization (3GPP, The 3rd Generation Partnership Project) has followed some content of the positioning method of the Global System for Mobile Communications (GSM, Global System for Mobile Communications) in the description of the WCDMA positioning method, and has made certain improvements. There are three positioning methods for WCDMA specified in 3GPP: positioning method based on Cell Id; Observed Time Difference Of Arrived (OTDOA, Observed Time Difference Of Arrived), which may include network-assisted configuration idle period (IPDL, Idle Period of DownLink) ) positioning method; network-assisted global positioning system (AGPS, Assisted Global Positioning System) method.

The event types of positioning requests in the 3GPP protocol now define two types: immediate positioning requests and delayed positioning requests.

The immediate positioning request requires the radio network controller (RNC, Radio Network Controller) on the access network side to determine the positioning method to locate the UE immediately after receiving the positioning request forwarded by the core network (CN, Core Network), obtain the positioning result and send to the CN, and then the CN is transferred to the positioning service client (LCS client).

Delay positioning There are two types of delay events defined at this stage: user equipment (UE, UserEquipment) availability (occurs after temporary unavailability, or occurs when the network is connected for the first time) positioning result reporting and area (currently defined by 3GPP agreement with business The positioning result is reported when the service area (SA, Service Area) changes.

The events corresponding to the report request type on the 3GPP Iu interface protocol (the interface between RNC and CN) are: direct report (direct) and report when the service area changes (Change of service area).

Since the current 3GPP protocol only defines two types of reporting events: direct reporting and event-triggered (service area change event occurrence) reporting, then only the direct reporting method can be used for tracking services, and the CN frequently sends location request messages in direct mode to the RNC to locate. On the one hand, this method increases the amount of messages, so that one tracking and positioning is divided into multiple independent positioning processes in the access network and UE, which is very complicated to implement and the response is not fast enough.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for realizing the tracking and positioning service in the mobile communication system, so that the realization of the tracking and positioning service is simple and the response is quick.

In order to solve the above-mentioned technical problems, the present invention provides a method for realizing tracking and positioning services in a mobile communication system, comprising the following steps:

(a) The core network sends a positioning request message to the radio network controller, requesting a user's tracking and positioning service;

(b) After receiving the request message, the radio network controller recognizes that it is a request for a tracking and positioning service, and sends a positioning measurement control message to the corresponding user equipment, requiring it to perform tracking and positioning service measurement according to a specified positioning type;

(c) After receiving the measurement control message, the user equipment determines the period of tracking and positioning, performs positioning processing every other period, and reports the result to the radio network controller;

(d) Each time the radio network controller receives the report from the user equipment, it obtains the location information of the user equipment, and reports it to the core network as a positioning result.

Further, the above-mentioned implementation method can also have the following characteristics: it also includes the following steps:

During the tracking and positioning service, when the service needs to be terminated, the core network sends a positioning termination request message to the radio network controller;

After receiving the positioning termination request message, the radio network controller notifies the user equipment to terminate the measurement of the tracking and positioning service, and deletes the local information and resources related to the service;

After receiving the message requiring it to terminate the measurement, the user equipment terminates the positioning measurement and reporting, and deletes the locally stored information related to this positioning.

Further, the above implementation method may also have the following characteristics: the positioning type specified by the radio network controller is based on user equipment positioning, and each time the user equipment completes positioning measurement and calculates its own position, it reports it; After receiving the location information of the user equipment, the network controller directly reports to the core network.

Further, the above implementation method may also have the following characteristics: the positioning type specified by the radio network controller is user equipment-assisted positioning, and the user equipment reports each time after completing the positioning measurement, and the radio network controller according to the After the location of the user equipment is calculated from the measurement result, it is reported to the core network.

Furthermore, the above implementation method may also have the following features: the positioning request message and the positioning measurement control message also include an optional item of "tracking and positioning service period". When this item is configured with a period value, the user equipment will The period value is used as the period of this tracking and positioning service, otherwise, the user equipment uses a preset default value as the period of this tracking and positioning service.

Further, the above implementation method may also have the following characteristics: the positioning request message also includes information about the required positioning accuracy, and in the step (b), the wireless network controller first selects a positioning method according to the positioning accuracy , and then determine whether the positioning method requires user equipment to participate, and if necessary, send a positioning measurement control message to the corresponding user equipment, and the user equipment performs positioning measurement according to the selected positioning method.

Further, the above implementation method may also have the following characteristics: when the core network requests the radio network controller to perform tracking and positioning services and terminate tracking and positioning, it specifies the event item of the request type in the positioning request message as tracking Positioning and terminating tracking are achieved by positioning.

Further, the above implementation method may also have the following characteristics: when the radio network controller requests the user equipment to perform tracking and positioning service measurement, it uses the positioning service type added under the UE positioning report quantity information element in the positioning measurement control message It is designated as "periodic report tracking business".

In order to solve the above technical problems, the present invention provides a method for realizing tracking and positioning services in a mobile communication system, comprising the following steps:

(A) The core network sends a positioning request message to the radio network controller, requesting a user's tracking and positioning service, and including the required positioning accuracy information;

(B) After receiving the request message, the radio network controller recognizes that it is a request for tracking and positioning services, and selects a positioning method according to the positioning accuracy. When the positioning method does not require the participation of the user equipment, the wireless The network controller locally sets the cycle of the tracking service, performs a positioning calculation on the user according to the selected positioning method every other cycle, and reports the obtained positioning result to the core network.

Further, the above implementation method may also have the following features: the positioning request message also includes an optional item of "tracking and positioning service cycle", and when this item is configured with a cycle value, the wireless network controller uses the cycle value as The period of this tracking and positioning service, otherwise, the preset default value is used as the period of this tracking and positioning service.

As can be seen from the above, the inventive method adds a kind of event type of location request: tracking report, CN sends location request once to RNC and just can receive the location information of tracking location continuously subsequently, thereby simplifies the realization of existing 3GPP protocol process, There is no need for frequent message interaction between the Iu interface and the Uu interface, the complexity of message processing is minimized, the implementation is more convenient, the processing is clearer, and the response time of tracking service location is faster.

Description of drawings

Fig. 1 is the structural block diagram of positioning business in WCDMA.

FIG. 2 is a schematic diagram of an overall flow of a general location request (CS_MT_LR) network location message of the mobile station termination type.

Fig. 3 is a flow chart of normal processing of the tracking and positioning service according to the embodiment of the present invention.

Fig. 4 is a schematic flow chart of tracking and positioning termination according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a message flow of tracking processing according to an embodiment of the present invention.

Detailed ways

The implementation method of the tracking and positioning service in this embodiment will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural block diagram of the positioning service in the WCDMA system, showing the positioning service client (LCS client), gateway mobile positioning center (GMLC), radio network controller (RNC), node B (Node B) related to the positioning service ) and user equipment (UE) and other devices and their connection relationships.

Fig. 2 shows the network positioning message flow of the general positioning request (CS_MT_LR) of the mobile station termination type, and generally describes a positioning process, including the following steps:

Step 201, the positioning service client (LCS client) initiates a positioning request, and notifies the Gateway Mobile Location Center (GMLC, Gateway Mobile Location Centre);

Step 202, the GMLC sends a Provide Subscriber Location (Provide Subscriber Location) message to a Mobile Switching Center (MSC, Mobile Services Switching Center) or a General Packet Radio System (GPRS, General Packet Radio System) service support node (SGSN, ServingGPRS Support Node), Notify it to perform a positioning;

Step 203, the MSC or SGSN interacts with the UE, the circuit switched (CS, Circuit Switched) domain needs to complete the paging and authentication functions, and the packet switched (PS, Packet Switch) domain needs to complete the paging and security process;

Step 204, the MSC or SGSN sends a location service location notification (LCS LocationNotification) message to the UE;

Step 205, the UE returns a location service location notification return (LCS Location Notification Return) message to the MSC or SGSN;

Step 206, after receiving the location service location notification return message, the MSC or SGSN sends a location request (Location Request) message to the RNC, requesting to locate the UE;

Step 207, after the RNC receives the positioning request from the MSC or SGSN, it starts to perform an independent positioning process on the access network side;

Step 208, RNC sends location report (Location Report) to MSC or SGSN;

Step 209, the MSC or SGSN sends a Provide SubscriberLocation ack (Provide SubscriberLocation ack) message to the GMLC;

In step 210, the GMLC sends the positioning result to the LCSClient through the mobile station downlink request process.

Above-mentioned each step has described the complete process flow of a normal positioning process of mobile station termination (MT-LR), and the process closely related to the improvement made by the present invention is step 206～208, and these several steps initiate (MO) tracking location service for mobile station In terms of both are the same.

Fig. 3 is a flow chart of the implementation of the tracking and positioning service according to the embodiment of the present invention, which mainly involves the processing of the positioning request message of the Iu interface, the positioning measurement control message of the Uu interface, and RNC and UE.

Step 301, CN (such as MSC or SGSN) sends location request message to RNC, requests to carry out the location location of the tracking service of certain user;

The content of the positioning request message is shown in the following table:

Location request message content cell describe Does it have to exist type of request event Value type: required

1 Direct report, 2 Report when the business area changes, 3 Tracking and positioning, 4 Stop direct reporting, 5 Stop reporting when the business area changes, 6 Stop tracking and positioning report area Value type: 1 geographical area 2 business area required precision code Refer to 3GPP TS25.413 for the code corresponding to the positioning accuracy optional Track the cycle of positioning business Period value setting: unit: second Optional only when the event is tracking business Vertical precision code See 3GPP TS25.413 Response time See 3GPP TS25.413 Positioning Priority See 3GPP TS25.413 LCS client type See 3GPP TS25.413

The above table lists the cell descriptions that need to be added to the tracking service, and the parts not listed have been clearly stated in the 3GPP agreement. Compared with the existing positioning request message, the event item in the request type adds two types of events: tracking and positioning and stop tracking and positioning. Here, the event type needs to be set to "3", that is, the tracking and positioning service.

The information element of the tracking and positioning service period is also added in the message. This information element is optional when the event is a tracking and positioning service, and must not exist in other event types. If the period of the tracking and positioning service is set in the message, the UE The positioning measurement is performed according to this period, if not set, the UE performs measurement according to the default period value. By setting the period value, real-time (shorter period, such as "seconds") and non-real-time (longer period) positioning tracking can be realized.

In addition, this embodiment assumes that the positioning accuracy required in the message is a relatively high-precision positioning. At this time, the AGPS or OTDOA positioning method should be used, and these methods require the participation of the UE in the positioning process.

Step 302, after the RNC receives the location request message, store relevant information, judge whether to track the location service according to the event item of the request type in the message, if yes, perform step 303; otherwise, according to the usual location service processing, has nothing to do with the present invention, Not described here;

In addition, before the RNC receives a positioning request, it will perform some initialization processing, including obtaining and storing auxiliary data.

Step 303, the RNC determines the positioning method (AGPS or OTDOA) and positioning type (i.e. based on UE positioning or UE-assisted positioning);

Step 304, the RNC sends a positioning measurement control message to the UE of the user, requesting it to perform positioning measurement of the tracking service type, and the message contains the identification of the selected positioning method and positioning type;

For the information in the positioning measurement control message, please refer to 3GPP TS25.331, where the UE positioning reporting quantity (UE positioning reporting quantity) information element needs to add a new "positioning service type" (service type). The specific description of the service type is shown in the following table Show:

cell describe Does it have to exist Positioning business type Service type Value type: Tracking business of aperiodic report, tracking business of periodic report required period value Reporting interval Unit: second Condition: exists when the business type selects periodic report business

That is, the location measurement control message indicates that the location service type is "periodic report tracking service", and the period value is also optional.

Step 305, the RNC waits to receive a positioning measurement report message from the UE (see steps 315-317 for the UE's processing procedure);

Step 306, after the RNC receives the positioning measurement report message of the UE, if there is a positioning result in the message, the result is filled in the positioning report message and sent to the CN, if the measurement result is in the message, the positioning result is calculated first, that is, the UE location, and then send the result to the CN through a location report message, and return to step 305.

The processing flow on the UE side is as follows:

Step 315, after receiving the positioning measurement control message, the UE analyzes the information element content in the message, and learns that the request is for tracking and positioning service measurement. If the period of the tracking and positioning service is specified in the message, set the period of the positioning timer as the period value , otherwise the period of the positioning timer is set to the period value of the default tracking and positioning service preset by the UE;

Step 316, the UE performs a positioning measurement according to the specified positioning method and positioning type, or a positioning measurement and calculation process, and then sends a positioning measurement report message to the RNC, and at the same time resets the positioning timer and restarts timing;

In this step, if the specified positioning type is UE based, the report message sent to the RNC has a positioning result, that is, the calculated position information of the UE; if the specified positioning type is UE assisted, the report message sent to the RNC Report messages with measurement results.

Step 317, the UE returns to step 316 when the positioning timer expires;

The above-mentioned periodical measurement and reporting of the UE, and the reporting process of the RNC to the CN always exist during the duration of the tracking and positioning service, until the location termination request message of the CN is received.

Fig. 4 is a processing flow chart when a tracking service needs to be terminated while the tracking service is in progress. Include the following steps:

Step 401, when the tracking service is in progress, the CN sends a location termination request message to the RNC, and the RNC may receive the message at any time during the normal location process;

Step 402, after the RNC receives the positioning termination request message, it is judged that there is a tracking service that requests termination locally;

Step 403, the RNC sends a positioning measurement control message (release) to the UE related to the service, requiring the UE to terminate the measurement of the tracking and positioning service, and at the same time, the RNC deletes the local information and occupied resources related to the tracking and positioning, and ends the tracking and positioning ;

Step 404, after receiving the message requesting to terminate the measurement, the UE terminates the positioning timer, ends the positioning measurement and reporting, deletes the locally stored information related to this positioning, and ends.

Figure 5 describes the message flow of the tracking process and the local processing of each device in this embodiment in another graphical way, including the normal processing of the tracking and positioning service and the process of terminating the tracking and positioning. It has been reflected in the description and will not be repeated here.

The method of the present invention can conveniently realize the processing of the tracking cycle business in the existing location business processing flow, which makes up for the defects of the existing 3GPP protocol on the positioning request type, the incomplete event definition and the complex process implementation, and at the same time makes the positioning of the tracking business Response times are faster.

On the basis of the foregoing embodiments, the technical solution of the present invention can also be transformed and modified, for example:

If only low-precision positioning is required in the location request message of the tracking type sent by the CN to the RNC, the RNC decides to select the Cell ID location method after receiving the message, that is, when the location process does not require UE participation, it will be internally given in the location request message. Set the tracking cycle timing of this service with a fixed cycle value or the default cycle value preset locally. When the cycle is reached, perform positioning calculations according to the Cell ID positioning method, and then report the positioning results to the CN. At this time, there is no need to interact with the UE, and the amount of network element interaction can be minimized and the positioning process can be performed with the highest efficiency.

For another example, when the network only provides services of a certain positioning method and the positioning method requires the participation of the UE, the RNC may also directly send a positioning measurement control message to the UE without selecting a positioning method.

In addition, the present invention is also applicable to TD-SCDMA communication system.

Claims (10)

1. the implementation method of tracing positioning service in the mobile communication system may further comprise the steps:

(a) core net sends locating request message to radio network controller, and certain user's tracing positioning service is carried out in request;

(b) after described radio network controller was received described request message, identifying was the request of tracing positioning service, sent the location survey control messages to corresponding user equipment, required its align_type by appointment to carry out tracing positioning service and measured;

(c) after described subscriber equipment is received described measurement control messages, determine the cycle of track and localization, carry out one-time positioning every one-period and handle, and to described radio network controller reported result;

(d) after described radio network controller is received reporting of described subscriber equipment, obtain the positional information of described subscriber equipment at every turn, and report described core net as positioning result.

2. implementation method as claimed in claim 1 is characterized in that, and is further comprising the steps of:

In the process that described tracing positioning service carries out, when needs stopped this business, described core net sent the location and stops request message to described radio network controller;

After described radio network controller receives that the location stops request message, the measurement of notifying described subscriber equipment to stop this tracing positioning service, and deletion local information and the resource relevant with this business;

After described subscriber equipment is received and required its message that stops measuring, stop location survey and report the information relevant of the local storage of deletion with this location.

3. implementation method as claimed in claim 1, it is characterized in that, the align_type of described radio network controller appointment is based on the location of subscriber equipment, described subscriber equipment reports after finishing location survey at every turn and calculating oneself position, and described radio network controller directly reports described core net after receiving the positional information of described subscriber equipment.

4. implementation method as claimed in claim 1, it is characterized in that, the align_type of described radio network controller appointment is the location of user equipment assisted, described subscriber equipment promptly reports after finishing location survey at every turn, described radio network controller is reported to described core net after calculating the position of described subscriber equipment according to this measurement result again.

5. implementation method as claimed in claim 1, it is characterized in that, the option that also comprises " tracing positioning service cycle " in described locating request message and the location survey control messages, when this disposes periodic quantity, described subscriber equipment is with the cycle of this periodic quantity as this tracing positioning service, otherwise subscriber equipment is with the cycle of default default value as this tracing positioning service.

6. implementation method as claimed in claim 1, it is characterized in that, in the described step (b), radio network controller is determined the localization method and the align_type of employing according to the ability information of the quality of service information in the request message and subscriber equipment and access network equipment.

7. implementation method as claimed in claim 2, it is characterized in that, when the described radio network controller of described core network requests carries out tracing positioning service and stops track and localization, be to realize by the event items of request type in the described locating request message being appointed as track and localization and being stopped track and localization.

8. implementation method as claimed in claim 1, it is characterized in that, when the described subscriber equipment of described radio network controller request carries out the tracing positioning service measurement, be to be appointed as " the tracking business of cycle report " by the positioning service type that UE positioning reporting amount cell in the location survey control messages is increased down to realize.

9. the implementation method of tracing positioning service in the mobile communication system may further comprise the steps:

(A) core net sends locating request message to radio network controller, and certain user's tracing positioning service is carried out in request, and comprises the quality of service information of requirement;

(B) after described radio network controller is received described request message, identifying is the request of tracing positioning service, and select a localization method according to the ability information of described quality of service information and subscriber equipment and access network equipment, when this localization method does not need subscriber equipment to participate in, this radio network controller is provided with the cycle of this secondary tracking business in this locality, by the localization method of selecting described user is carried out one-time positioning every one-period and calculate, and the positioning result that obtains is reported described core net.

10. implementation method as claimed in claim 9, it is characterized in that, the option that also comprises " tracing positioning service cycle " in the described locating request message, when this disposes periodic quantity, described radio network controller is with the cycle of this periodic quantity as this tracing positioning service, otherwise, with the cycle of default default value as this tracing positioning service.

Images