CN1305347C - Accurately positioning method for personal hand-held telephone system user - Google Patents

Abstract

A precise positioning method for a PHS system user, comprising the following steps: a network manager sends a positioning request to a base station controller under the user's current call area through an access gateway; the base station controller sends a positioning request to the base station under it call request; the base station paging the user; the user sends a link establishment request to a base station; the base station reports the information associated with its position and the received signal strength of the user to the network manager, and at the same time reports to the network manager The user sends a message rejecting link establishment; the user judges whether the number of times the link establishment request is rejected reaches the threshold, and if yes, the network management calculates the user location based on the information received from multiple base stations; otherwise, it looks for other base stations and executes the sending again Steps for a link establishment request. The invention realizes the low cost and high accuracy of PHS user positioning through multi-base station positioning.

Description

A Method for Precise Positioning of Users of Personal Handy Phone System

technical field

The invention relates to a positioning method in a mobile communication system, in particular to a positioning method for a PHS (Personal Handyphone System, Personal Handyphone System) user.

Background technique

At present, the total number of wireless local phone users in China has exceeded 30 million and will continue to grow. In order to improve the communication level and quality of life of the majority of users, in addition to providing the basic services of voice calls, the provision of value-added services, such as short messages, videophones, and data services, is becoming increasingly important. Among them, a large class of new services (telecom value-added services) are related to determining the current location of the user, for example; family monitoring service: when the elderly or children go out, the parents can regularly receive the other party's current location information sent by the wireless local telephone system; When you get lost and do not return, you can immediately find its current location; tour guide service: when the user travels to other cities, he can apply for a tour guide service in the local area, and then the information station can send the corresponding nearby information to the user according to the user's current location reported in real time by the PHS system. The introduction of scenic spots, restaurants, hotels, shopping malls, etc.; emergency rescue service: when users encounter traffic accidents or car breakdowns in remote suburbs, they can call 110 and other emergency numbers. The current actual location of the user can be viewed on the map; real-time short message advertising service: when the user moves near a shopping mall, cinema, museum or entertainment venue, he can receive promotional advertisements and new film introductions sent by the merchant through real-time short messages. Obviously, accurately locating the current location of the user is the basis for realizing the above-mentioned various new services.

There are currently two user positioning methods: one is to use GPS (Global Position System) positioning, which can accurately locate the position of mobile users, but it requires communication satellites and special GPS terminals, which is expensive and not suitable for ordinary users ;

The other is the single base station positioning method of the PHS system. Please refer to the Chinese patent application number 02137333 published on March 31, 2004 for a positioning method for PHS system users. The method uses the base station where the PHS user mobile phone is located For an analog call, the system locates the user according to the base station occupied by the user. The positioning accuracy is the coverage of a single base station, about 500 meters. However, this method has low positioning accuracy and cannot meet the high-precision positioning requirements for users.

Therefore, it is an urgent problem to provide a user positioning method with high positioning accuracy and low technical cost.

Contents of the invention

The technical problem to be solved by the present invention is to provide a positioning method for a PHS system user with high positioning accuracy.

The technical solution provided by the present invention for solving the above-mentioned technical problems is to provide a precise positioning method for PHS system users, which includes the following steps: (a). Send a positioning request to the user; (b). The base station controller sends a positioning paging request to the base station; (c). The base station paging the user; (d). The user sends a link to a base station (e). The base station reports the information associated with its position and the received signal strength of the user to the network manager, and simultaneously sends a message rejecting link establishment to the user; (f). The user Determine whether the number of times the request for link establishment is rejected reaches the threshold, and if so, execute step (g); otherwise, find other base stations and execute this (d) step; (g). The network management calculates based on information received from multiple base stations user location.

Compared with the prior art, the present invention utilizes the mechanism that the called user can re-initiate the link establishment request at other base stations after the link establishment request is rejected, so as to realize the precise positioning of the user's multi-base stations; and without adding new hardware, only It is necessary to upgrade the network side and base station software to realize the precise positioning function of users, and at the same time support all existing mobile phones in the network without any changes, and various new services provided on this basis can also be upgraded with software The method is implemented at low cost, so that every wireless local phone user can afford it, the cost is low, and it can be popularized and applied. It has very positive practical significance for the development of new services of the PHS system.

Description of drawings

FIG. 1 is a schematic diagram of a PHS system according to an embodiment of a precise positioning method for a PHS system user according to the present invention.

FIG. 2 is a flowchart of an embodiment of a method for precise positioning of a PHS system user according to the present invention.

Detailed ways

Please refer to Fig. 1, it is a kind of PHS system user's accurate location method embodiment PHS system schematic diagram of the present invention, this PHS system includes public telephone network, the PHS system access gateway that is connected with it, the PHS system access gateway that is connected with Base station controllers 1 and 2 connected to the network management and PHS system access gateway, base stations 1, 2 and 3 connected to the controller of base station 1, and base stations 4 and 5 connected to the controller of base station 2. Wherein the network management in the PHS system saves the precise geographic location data of all base stations, and the geographic location can be indexed by the unique identifier of each base station. In this embodiment, the PHS mobile phone user A is within the range of No. 1 base station.

Because the mobile phone used in the wireless local telephone system has no power control, the signal strength of the mobile phone is related to the distance from the mobile phone to the base station, so according to the geographical location of multiple base stations and the signal strength of the mobile phone received by these base stations, the weighted Calculate the location of the mobile phone and accurately locate the user's location.

Fig. 2 shows the flow chart of a kind of precise positioning method embodiment of PHS system user of the present invention, and the precise positioning method of this PHS system user comprises the following steps:

Step 301: the network manager sends a location request for user A;

Step 302: The access gateway initiates a positioning request to the No. 1 base station controller under the calling area where the user A is currently located;

Step 303: After receiving the positioning request, the No. 1 base station controller sends a positioning paging request to all base stations controlled by it (ie, No. 1, No. 2 and No. 3 base stations);

Step 304: Base stations 1, 2 and 3 page the user A respectively;

Step 305: User A first sends a link establishment request to the No. 1 base station;

Step 306: After receiving the link establishment request of the user A, the base station reports the received signal strength of the user and its identification to the network management, and sends a link establishment rejection message to the user A at the same time;

Step 307: After receiving the message that the link building is rejected, user A determines whether the number of times the link building request is rejected exceeds the threshold. Currently, for all mobile phones, the threshold is 3-4. If it does not exceed the threshold, execute step 308. If If the threshold has been reached, step 309 is executed;

Step 308: User A sends a link establishment request to other base stations, and then executes Step 306;

Step 309: The network manager calculates the position of the user by weighting according to the base station identifiers reported by the above-mentioned multiple base stations (the network administrator indexes the precise geographic location of each base station through the base station identifiers) and the received user signal strength (multiple base station coordinates and user signal strengths are known In the case of , various existing calculation methods can be used).

The user positioning method in this embodiment can be realized only by upgrading the network side and base station software on the basis of the original PHS system hardware, and the positioning accuracy of the user's position is calculated to be 50 meters.

The present invention utilizes the mechanism that after the called user's link building request is rejected, another base station can re-initiate the link building request, and the mechanism can be sent up to 3-4 times, so as to realize the precise positioning of multiple base stations of the user; and no need to add new hardware , only need to upgrade the network side and base station software to realize the precise positioning function of users, and support all existing mobile phones in the network at the same time, without any changes, and various new services provided on this basis can also use software The way of upgrading is realized at low cost, so that every wireless local phone user can afford to use it, the cost is very low, and it can be popularized and applied. It has very positive practical significance for the development of new services of the PHS system.

In practice, a dedicated location server can be used to initiate user positioning and perform weight calculation, and such location server should be regarded as a part of the network management of the present invention.

The network manager can accept the positioning request of the client and return the positioning result, that is, before the step 301 of the embodiment, the network manager also includes the step of receiving the positioning request sent by the user terminal, and after the step 309, the network manager also includes the user's location information notification steps for this user.

Claims (5)

1. A precise positioning method for a PHS system user, comprising the following steps: (a). The network management sends a positioning request to the user through the access gateway to the base station controller under the user's current calling area; (b). The base station controller sends a positioning paging request to its subordinate base stations; (c). The base station paging the user; (d). The user sends a link establishment request to a base station connected to the base station controller; (e). The base station reports the information associated with its location and the received signal strength of the user to the network manager, and at the same time sends a message rejecting link establishment to the user; (f). The user judges whether the number of times the request for link establishment is rejected exceeds a threshold, and if so, executes step (g), otherwise searches for other base stations, and executes the (d) step; (g). The network manager calculates the location of the user based on the information received from multiple base stations. 2. The precise positioning method of a PHS system user as claimed in claim 1, characterized in that: in the (e) step, the information associated with the base station location is the base station identification and the network manager saves information related to Each base station identifier uniquely corresponds to the precise geographic location data of the base station for searching. 3. The precise positioning method of a PHS system user as claimed in claim 2, characterized in that: in the (g) step, the network management determines the geographic location of each base station according to the received multiple base station identifications, and combines each The geographical position of the user is calculated by weighting the signal strength of the user reported by the base station. 4. A precise positioning method for PHS system users as claimed in claim 1, characterized in that the threshold value in step (f) is 3 or 4. 5. The precise positioning method of a PHS system user as claimed in claim 1, characterized in that: before said (a) step, the network management also includes the step of receiving the positioning request sent by the user terminal, (g) step Finally, it also includes the step of the network manager notifying the user of the user's location information.

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