JPH10336727A - Mobile radio communication system having position detection function of mobile station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile radio communication system having a position detection function of a mobile station in which a position of a mobile station is located within a smaller range in a cell covered by a base station, the position detection means to reduce traffic caused by improving detection accuracy of position information is provided and the detected position information is effectively utilized. SOLUTION: An estimated distance of a mobile station 101 to each peripheral base station is calculated based on radio wave strength information from pluralities of peripheral base stations 103-105 received by the mobile station 101, position and covered cell information (expressed in a circle/ellipse or the like with a size according to a transmission radio wave strength) of the peripheral base stations 103-105 stored in a database 107 of an in-zone base station obtained by the communication between the mobile station 101 and the in-zone base station 103, and the obtained position information of the mobile station is displayed by the mobile station itself and the mobile station 102 of the communication opposite party. Moreover, the estimated distance is calculated by the base station or the mobile station and transmitted to the user making a communication.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cellular mobile radio communication network or system, and a mobile radio communication system having a mobile station position detecting function for detecting and notifying the position information of the location of a mobile station. The present invention relates to the system capable of displaying the position information.

[0002]

2. Description of the Related Art Conventionally, when a mobile station attempts to know its own position information, it can only obtain information per radio zone of one base station. there were.

A method of estimating the position of a mobile station using information on the intensity of radio waves transmitted from the mobile station to a plurality of base stations has also been proposed (see, for example, Japanese Patent Application Laid-Open No. 6-261366). According to the method, a plurality of base stations are requested to measure the intensity of the radio wave of the mobile station, and a measurement result is obtained from each base station to estimate a position. There is a possibility that unnecessary traffic may occur, for example, a request may be made to a base station that cannot be reached. Furthermore, in this conventional example, since the position information is notified by voice as well,
Alternatively, there is a problem in that the user may miss it and the position is difficult to understand intuitively.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has been made in consideration of the above problem in the prior art. A mobile station which provides a position detecting means for identifying a position and improving the detection accuracy of the position information while reducing traffic generated for this purpose, and enabling the detected position information to be used effectively. An object to be solved is to provide a mobile radio communication system having a position detection function.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a base station receives a request for acquiring its own location information from a mobile station, or transmits a location information of its own to a communication partner. By receiving the notification request, the strength information of the radio wave from each peripheral base station received by the mobile station and the information of each peripheral base station represented by a circle / ellipse having a size corresponding to the radio wave intensity transmitted from the base station are displayed. Using the cover cell area information, that is, by weighting the cover cell information of each peripheral station by the strength information of the radio wave measured by the mobile station, calculate the estimated distance from the mobile station to each peripheral base station, The result is shown as a circle or an ellipse, which is obtained by enlarging or reducing the cell range of each base station, or an area surrounded by the estimated distance from each base station. Or the There is provided a mobile radio communication system comprising a position detecting means of the mobile station to notify the mobile station of the other party of the dynamic station.

[0006] Further, the present invention further provides a means for a mobile station that has received position information from a base station to superimpose and display the map information it has in advance and the position information received from the base station, A mobile station that informs and displays the user when performing a handover (going out of the coverage area of one base station and entering the coverage area of another base station) when instructed by the user The present invention also provides a mobile radio communication system including the position detecting means.

According to the present invention, by using only a mobile radio communication network, an artificial satellite or the like is not used.
Not only can it easily obtain its own position information without generating useless traffic between the mobile station and the base station and display the position information, but also realize them with a small portable terminal. Therefore, it is possible to configure a navigation system with a small portable terminal by constantly acquiring its own position information.
In the display unit, the range of the cell to which the handover has been performed can be displayed by blinking or coloring means such as known in the art, so that the user can easily determine his / her position.

In a cellular mobile radio communication system comprising a plurality of mobile stations and a plurality of base stations, the present invention provides radio field intensity information received from an arbitrary mobile station from a surrounding base station and the surrounding base station. From the position information of the location point and the cover cell range information including the intensity distribution information of the radio wave that sets the scheduled communication area by the intensity distribution of the radio wave emitted from the peripheral base station, from the respective peripheral base stations of the mobile station Is calculated to detect the position of the mobile station.

According to a second aspect of the present invention, in the first aspect of the present invention, the mobile station transmits a request for notification of its own location information to the serving base station and the measured radio wave intensity information from each peripheral base station. Wherein the serving base station comprises the mobile station position detecting means, from the radio field intensity information received from the mobile station and the cover cell range information of the peripheral base stations, from the peripheral base stations of the mobile station. The mobile station has a function of detecting the position of the mobile station according to claim 1, wherein the estimated distance is calculated and the obtained estimated distance is notified to the mobile station.

According to a third aspect of the present invention, in the first aspect of the present invention, the mobile station requests the serving base station to notify its location information to the other party and also measures the radio wave from each peripheral base station. Transmitting the strength information, the serving base station comprises the mobile station position detecting means, from the radio wave intensity information received from the mobile station and the cover cell range information of each of the peripheral base station, the mobile station of the mobile station The mobile station according to claim 1 or 2, wherein an estimated distance from each of the peripheral base stations is calculated, and the obtained estimated distance is notified to a call partner of the mobile station. It was done.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the mobile station sends a notification request of the position of each peripheral base station and its coverage cell range information together with information of each peripheral base station whose radio field intensity is measured. Transmitting to the serving base station, the serving base station responds to the notification request, transmits the location and cover cell range information to the mobile station, and the mobile station receives the location of each of the neighboring base stations and The mobile station according to claim 1, further comprising the mobile station position detecting means for calculating an estimated distance of the mobile station from the peripheral base station from cover cell range information and measured radio field intensity information of each peripheral base station. It has a station position detecting function.

A fifth aspect of the present invention is the invention according to any one of the first to fourth aspects, wherein the position information of each of the base stations is represented by an absolute position, and the intensity distribution information of the radio wave is represented by the transmitted radio wave intensity. Cover cell range information of each of the base stations is generated by expressing a circle / ellipse of an appropriate size.

According to a sixth aspect of the present invention, in the invention of any one of the first to fifth aspects, the calculation result of the estimated distance from each of the peripheral base stations to the mobile station is obtained by calculating the cover distance expressed by a circle or an ellipse. The cell range information is expressed by weighting the radio wave intensity measured at the mobile station for each of the peripheral base stations and enlarging and reducing the cell range information.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the image display means and the map information are prepared, and based on the position information of the mobile station detected by the mobile station position detection means. Generating the composite image information by superimposing the position information of the mobile station on the corresponding location on the map information,
The current position of the mobile station is displayed on a map by inputting to the image display means.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, when the mobile station performs a handover, the user is notified of the handover, and at the same time, the position information of the mobile station is used as a display position at the time of the handover. The mobile station has a function of detecting the position of the mobile station according to the seventh aspect of the present invention.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a system configuration diagram of the present invention. The mobile stations 101 and 102 are in the cover cells of the base stations 103 and 104, respectively, and are in a state of talking with each other. The mobile station 10
1 and 102 always measure the intensity of radio waves received from the neighboring base stations 103, 104 and 105 for handover. In addition, each of the base stations 103 and 10
4 and 105 are connected to a database 107 in which information on a plurality of base stations, a plurality of mobile stations, and the location of each base station and information on the range of its cover cell are registered. , The location (position) of the base station and the data of the cell area covered are circles,
It is held in the shape of an ellipse.

FIG. 2 is a flowchart showing the operation for position detection. FIG. 2 (A) is a flowchart of the operation of the mobile station issuing a request for position detection, and FIG. 2 (B) is FIG.
FIG. 2 is a flow chart when a mobile station talking to the mobile station of (A) receives position information from the mobile station, and FIG.
(C) is a flowchart of the operation of the base station when receiving a request for position detection.

In FIG. 1, when the mobile station 101 issues a request for position detection to the base station 103, the mobile station 101 issues a position information notification request according to FIG. Prior to this, the mobile station 101 first measures the intensity of radio waves arriving from a nearby base station (step S201). Then, together with the request for the notification of the position information, the measurement result of the intensity of the radio wave from each base station measured in step S201 is transmitted to the base station 103 (step S202). Next, it is determined whether or not there is a request for notification of location information to the other party (step S203). If it is determined that the notification destination of the location information is the mobile station 102 of the other party, the process ends there. However, if the notification destination is not the request to the other party but the notification destination is itself, the mobile station waits for the notification of the position information from the base station 103 and receives the notification to be transmitted (step S20).
4) Display the received position information on its own display unit (step S205).

If the notification request in step S202 is a notification of a communication partner, the mobile station 102 transmits the request to the mobile station 102 shown in FIG.
According to the flowchart of (1), the mobile station 101 receives the location information of the mobile station 101 from the base station (step S206), and displays the location information on its display unit (step S207).

Next, the operation of the base station 103 that has issued the notification request will be described with reference to the flowchart of FIG.
The base station 103 receives the radio wave intensity information from each base station together with the position information notification request from the mobile station 101 (step S208), and calculates the position of the mobile station 101 from the received data.
Then, the mobile station 101 obtains the position information of each base station whose radio field intensity has been measured by the mobile station 101 and the cover cell range data of the cell covered by the base station (step S209).
The base station 103 calculates the estimated distance from each base station to the mobile station 101 based on the obtained cell information (cell range data expressed by a circle / ellipse having a size corresponding to the transmission radio field intensity of each base station). Is performed by enlarging or reducing the cell information represented by a circle / ellipse by weighting with the received radio wave intensity information (step S210).

Next, the base station 103 determines whether the destination of the position information notification request is the requesting mobile station 101 or the mobile station 102 of the other party (step S).
211) If the notification request is the request source, the mobile station 10
In step S212, the calculated estimated distance from each base station represented by a circle and an ellipse, the position of each base station, and information on the cover cell of the serving base station are transmitted to step S212. If the notification request is for the other party, the mobile station 1 that is the other party
02, the calculated estimated distance from each base station to the mobile station 101, the position information of each base station, and the information of the cover cell of the base station where the mobile station 101 is located are transmitted (step S21).
3).

This embodiment is different from the above embodiment in that the mobile station calculates the estimated distance. FIG.
FIG. 3 is an operation flowchart for notifying the position and cover cell range information of each of the neighboring base stations in this embodiment, and FIG. 3 (A) shows a movement requesting information notification of the position and cover cell range information. FIG. 3B is a flowchart of the operation of the station, and FIG. 3B is a flowchart of the operation of the base station when receiving a request for information notification of the position and the range of the cover cell.

When the mobile station 101 in FIG. 1 transmits a request for notification of the location information of the receiving base station to the base station 103, the mobile station 101 issues a request for notification of the location and cover cell range information in accordance with FIG. At this time, the mobile station 101 first measures the intensity of the radio wave arriving from the peripheral base station (step S3).
01), and then transmits to the base station 103 a request for position information and base station ID information of the base station whose radio wave intensity has been measured by the mobile station 101 (step S30).
2) Then, it waits for the notification of the position information from the base station 103 (step S303). Upon receiving the position information of the receiving base station from the base station 103, the mobile station 101 expands the received cover cell information of each of the neighboring base stations by weighting with the already measured radio wave intensity information from the surrounding base station. The image is reduced (step S304) and displayed on the display unit together with the map information held therein (step S305).

The base station 103 that has received the notification request from the mobile station 101 performed by the operation of the mobile station 101 described above.
3B will be described with reference to the flowchart of FIG. 3 (B). First, the base station 103 requests the mobile station 101 to notify the base station of position information of the receiving base station, and measures the radio field intensity of which base station the mobile station 101 has. The information is received (step S306). Next, based on the received information, the base station 103 reads from the database 107 the location of the base station whose radio wave intensity was measured by the mobile station 101 and its cover cell range data (the radio wave intensity distribution according to the transmitted radio wave intensity). Is obtained (step S307), and the obtained data is notified to the mobile station 101 (step S307).
308).

FIG. 4 shows a display example of a position of a mobile station as one embodiment according to the present invention. FIG. 4A shows the estimated distances 402, 403, and 404 from each base station to the mobile station.
And the cover cell range 405 covered by the serving base station is displayed on a map in the screen by a circle or an ellipse. In particular, the coverage cell range 405 of the serving base station is indicated by a bold line, a dotted line,
Alternatively, the area surrounded by each line indicating the estimated distance range from each base station is indicated by changing the color or the like.
This is an example of displaying as 6. FIG. 4B shows an example in which only the area surrounded by the estimated distance from each base station is displayed on the map on the screen as the location 406. FIG.
(C) is a display example in which it is difficult to specify the location of the mobile station clearly due to an error in the estimated distance. In the display, an area surrounded by the estimated distance from the base station is displayed (see FIG. 4A). ) Is omitted.

As an embodiment of the system according to the present invention,
The operation at the time of handover will be described. FIG.
FIG. 6 shows a state of the system and a display example of a screen for explaining an operation when 01 moves from the cell 502 of the base station 509 to the cell 503 of the base station 510. FIG.
The flowchart about the operation example at that time is shown. An operation example at the time of handover will be described with reference to FIGS. 5 and 6. In the case where the mobile station 501 is instructed by a user to inform the user of the handover when the mobile station performs handover (step In S601), the base station 50 is executed according to the procedures shown in FIGS. 3A and 3B.
9, the mobile station obtains its current position by issuing a request for notification of position and cover cell range information (step S9).
602), and in particular, information on the range of the cell 502, which is the serving cell of the base station 509, is stored and held.
After that, until the handover is performed, the cell 5
02 is held, and when a handover is performed to the base station 510 (step S603), a request for a position information notification is transmitted to the base station 510 to acquire its own position information ( Step S604). Thereafter, the user is informed that the handover has been performed (step S605), and the display unit 504 of the mobile station 501 is displayed.
For example, as shown in FIG.
05, 506 and cell information 507, 508 of each base station are indicated by a bold line or the like.
Is displayed by blinking or the like, so that the user can know where it has moved (step S606).

In this embodiment, the estimated distance from the base station to the mobile station is calculated by the base station and transmitted to the mobile station. However, the base station does not calculate the estimated distance, but calculates the estimated distance of each base station. It is a matter of course that only the cell information is transmitted to the mobile station, and the mobile station calculates the estimated distance from each base as in the embodiment described above.

[0028]

【The invention's effect】

Advantageous Effect Corresponding to Claim 1: According to the present invention, it is possible to specify the position of a mobile station to a finer range in a serving cell based on the radio field intensity measurement from the base station in the mobile station. Further, since the position of the mobile station is estimated using the intensity information of the radio wave from the base station, no unnecessary traffic is generated as compared with the method of estimating the distance using the intensity information of the radio wave from the mobile station. In addition, it is possible to easily transmit the information on the current position to the terminal of the user or the terminal of the other party, and to display the information as necessary. Also, by always acquiring position information, it is possible to configure a navigation system without using artificial satellites.

Advantageous Effect Corresponding to Claim 2: In addition to the effect of Claim 1, the mobile station notifies the serving base station of the result of the measurement of the radio wave intensity from the peripheral base station together with a notification request. By simply performing this operation, the user can confirm his / her own position with a simple operation without preparing any means or data for calculating position information (estimated distance, etc.) on the mobile station side.
A great advantage is also brought about in the function of the mobile terminal of the communication system.

Advantages Corresponding to Claim 3: Claims 1 and 2
In addition to the above effect, the mobile station only needs to notify the other party of the location information of the mobile station required by the serving base station. It becomes possible to inform the position. Also, when notifying the other party of his / her own position, the operation is performed from his / her own terminal, so that it is not possible for another person to check his / her own position without knowing, and privacy can be protected.

Advantageous Effect Corresponding to Claim 4: In addition to the effect of Claim 1, the mobile station is provided with processing means for obtaining an estimated distance from each peripheral base station and the like, and processing means meeting the request of the mobile station is provided. It becomes possible to configure.

Advantageous Effect Corresponding to Claim 5: In addition to the advantageous effects of Claims 1 to 4, the present invention provides specific means for creating data suitable for image display as cover cell range information of a base station. is there.

According to the sixth aspect of the present invention, in addition to the effects of the first to fifth aspects, a method of expressing a location of a mobile station based on a calculation result of an estimated distance of the mobile station from the surrounding base station is described. Can be performed by a simple processing method of weighting the diameter of the circle / ellipse indicating the cover cell range by the radio wave intensity measured by the mobile station.

Effect corresponding to Claim 7: In addition to the effects of Claims 1 to 6, in addition to indicating the position of the mobile station as an estimated distance from the base station, the absolute position can be easily represented by image representation on a map. It becomes possible to grasp. Also,
By displaying the image, unlike communication by voice, it is possible to eliminate mistakes in hearing or missing in the notification of position information.

According to the eighth aspect, in addition to the effect of the seventh aspect, it is possible to display a stable position information of the mobile station at the time of handover so that the user can recognize the handover state. The information can be used effectively even in the case of change.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a system according to an embodiment of a mobile radio communication system having a mobile station position detecting function according to the present invention.

FIG. 2 is a flowchart showing an operation example of position information notification by the system of FIG. 1;

FIG. 3 is a flowchart illustrating an operation example of a position and cover cell range information notification when an estimated distance is calculated in a mobile station.

FIG. 4 is a diagram showing an embodiment of a method of displaying position information on a portable terminal as one embodiment of the present invention.

FIG. 5 is a diagram illustrating an embodiment of an operation at the time of handover in the system according to the present invention, and is a diagram illustrating an example of an operation state and a display.

FIG. 6 is a flowchart showing an operation example of handover notification in the embodiment shown in FIG. 5;

[Explanation of symbols]

101, 102, 501 ... mobile station, 103, 104, 1
05, 509, 510 ... base station, 106, 405, 41
0, 502, 503 ... cell, 107 ... database of base station information, 401, 406 ... expected location of mobile station, 40
2,403,404,407,408,409,50
7,508 ... estimated distance from base station to mobile station, 504
... Display unit of portable information communication terminal, 505, 506 ... Cell range.

Claims (8)

[Claims] 1. In a cellular mobile radio communication system comprising a plurality of mobile stations and a plurality of base stations, radio field intensity information received from an arbitrary mobile station from a peripheral base station and a position of a location point of the peripheral base station Calculating an estimated distance of the mobile station from each of the peripheral base stations from the information and the cover cell range information including the intensity distribution information of the radio waves that sets a scheduled communication area based on the intensity distribution of the radio waves emitted from the peripheral base station. A mobile radio communication system having a mobile station position detecting function, further comprising mobile station position detecting means for detecting the position of the mobile station. 2. The mobile station transmits, to the serving base station, a request for notifying its location information and information on the measured radio wave intensity from each of the neighboring base stations. With detection means, from each radio field intensity information received from the mobile station and the cover cell range information of each peripheral base station,
The mobile radio communication having a function of detecting the position of a mobile station according to claim 1, wherein an estimated distance of the mobile station from each of the peripheral base stations is calculated, and the obtained estimated distance is notified to the mobile station. system. 3. The mobile station transmits, to the serving base station, a request for notifying the caller of its own location information to the other party, and the measured radio wave intensity information from each of the neighboring base stations. Comprising the mobile station position detecting means, from each radio field intensity information received from the mobile station and the cover cell range information of each peripheral base station, calculate the estimated distance of the mobile station from each peripheral base station, obtain 3. The mobile radio communication system having a function of detecting a position of a mobile station according to claim 1, wherein the estimated distance is notified to a call partner of the mobile station. 4. The mobile station transmits, to the serving base station, a request for notification of the location of each surrounding base station and its coverage cell range information, together with information on each surrounding base station whose radio field intensity has been measured. In response to the notification request, the base station transmits the position and cover cell range information to the mobile station, and the mobile station receives the position and cover cell range information of each of the peripheral base stations and measures each of the peripheral base stations measured. The mobile station position detecting means for calculating an estimated distance of the mobile station from the surrounding base station from radio field intensity information is provided.
A mobile radio communication system having the function of detecting the position of a mobile station according to any one of the preceding claims. 5. The position information of each of the base stations is represented by an absolute position, and the intensity distribution information of the radio waves is represented by a circle / ellipse having a size corresponding to the intensity of a transmitted radio wave. The mobile radio communication system having a mobile station position detecting function according to any one of claims 1 to 4, wherein cover cell range information is generated. 6. A calculation result of an estimated distance from each of the peripheral base stations to the mobile station is obtained by calculating the radio field intensity measured at the mobile station for each of the peripheral base stations by using the cover cell range information expressed by a circle or an ellipse. Weighted by
2. The method according to claim 1, wherein the expression is made by reducing the size.
6. A mobile radio communication system having a mobile station position detection function according to any one of claims 5 to 5. 7. An image display means and map information are prepared, and based on the position information of the mobile station detected by the mobile station position detection means, the position information of the mobile station is superimposed on a corresponding location on the map information. 7. The mobile station position detection according to claim 1, wherein the mobile station generates a combined image information, inputs the synthesized image information to the image display means, and displays an image of the current position of the mobile station on a map. A mobile radio communication system having a function. 8. The system according to claim 1, wherein when the mobile station performs a handover, a user is notified of the handover, and at the same time, the position information of the mobile station is identifiably displayed as a display position at the time of the handover. A mobile radio communication system having a mobile station position detection function according to claim 7.