JPH07203542A - Mobile telephone system - Google Patents

Abstract

PURPOSE:To speedily detect the position of a mobile telephone set by allowing a base station to store map data of an area and a mobile telephone set to detect position data and to combine. position data to map data sent from the base station so as to display. CONSTITUTION:The base station 5 is provided with a map data memory 54 storing map data of the area the base station 5 covers and the mobile telephone set 6 is provided with a GPS receiver 8 detecting position data of the mobile telephone set 6 and a display part displaying map data sent from the base station 5. Then, map data displayed on the display part is combined with position data detected by the GPS receiver 8, and displayed. Consequently, from the display on the display part, the user of the mobile telephone set can easily specified the position of himself so as to inform the calling opposite party of his existing place and to arrive at a desired place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile telephone system having a positioning function.

[0002]

2. Description of the Related Art Recently, mobile telephones that can call the other party from the outside or from a car to make a call have been widely used. Such mobile telephones include PHP (Personal Handy Phone). It is considered that it will spread further in the future due to its practical application, and various methods of using it are being tried.

By the way, since such a mobile telephone can make a call while moving appropriately without specifying the place where the mobile telephone is used, the user does not know the location where he / she exists. Often used.

[0004]

However, the fact that the user cannot specify the position where he / she is present means that, for example, even if he / she can make a call with the other party, he / she cannot be notified of his / her whereabouts. However, there is a problem that it may not reach the intended place smoothly.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a mobile telephone system having a positioning function capable of quickly detecting the position of a mobile telephone user.

[0006]

According to the present invention, a plurality of base stations are connected to a mobile telephone network, and in response to a call from the mobile telephone, another telephone is transmitted from the base station via the mobile telephone network. In the mobile phone system capable of communicating with a mobile phone, the base station has a storage unit for storing map data of an area covered by the base station, and the mobile phone detects position data of the mobile phone. Position data detection means and display means for displaying the map data stored in the storage means sent from the base station, and the position detected by the position data detection means in the map data displayed on the display means. The data is displayed in combination.

Further, according to the present invention, a plurality of base stations are connected to the mobile telephone network, and when a call from the mobile telephone is made, the base station communicates with another telephone through the mobile telephone network. In the mobile telephone system made possible, the base station is
The mobile telephone has storage means for storing map data of an area covered by the base station, and the mobile telephone displays the map data stored in the storage means sent from the base station, and the display means. There is an input means for inputting a search word to the displayed map data, and a point on the map data of the display means corresponding to the search word input by this input means is marked.

Further, according to the present invention, a network management station and a plurality of base stations are connected to the mobile telephone network, and when a call from the mobile telephone is made, another telephone is transmitted from the base station via the mobile telephone network. In the mobile telephone system that enables a call with the network management station, the network management station has a storage unit for storing map data of an area covering the entire service area, the base station,
The mobile phone has storage means for storing map data of an area covered by the base station, and the mobile telephone displays the map data stored in the storage means sent from the base station and displays a map of a desired point. A search instruction means for instructing a search of map data, the corresponding map data is searched from the storage means of the network management station according to the search instruction of the search instruction means, and the searched corresponding map data is stored in the base station. The map data stored in the storage means of the mobile telephone is displayed on the display means of the mobile telephone.

[0009]

As a result, according to the present invention, the mobile telephone can display the map data of the area covered by the base station sent from the base station and the position data detected for the mobile telephone in combination. Therefore, it is possible for the mobile telephone user to easily identify the position where he / she is.

Further, according to the present invention, in the mobile telephone, by inputting the search word to the map data of the area covered by the base station, which is transmitted from the base station, the map data corresponding to the search word is input. Since the point can be marked, the mobile phone user can easily identify his / her existing position also in this case.

Further, according to the present invention, when an instruction to search the map data of a desired point is issued, the corresponding map data is searched from the map data of the area covering the entire service area of the network management station, and the map data is retrieved via the base station. Since it can be displayed on the display means of the mobile telephone, map data of a desired point can be easily obtained.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a schematic configuration of the first embodiment. In the figure, reference numeral 1 denotes a public telephone network composed of ISDN or the like. To this public telephone network 1, a fixed telephone 2 such as a general home is connected and a mobile telephone network 3 is connected.

A network management station 4 and a plurality of base stations 5 are connected to the mobile telephone network 3. The network management station 4 performs comprehensive management of the mobile telephone network 3, and includes a home memory 41 that stores map data of an area that covers the entire mobile telephone network 3, a billing management unit 42 that manages billing for calls, It has a contractor management unit 43 for managing mobile phone contractors. Further, the base station 5 includes a map data memory 54 that stores map data of an area covered by the base station 5 among the map data stored in the signal processing circuit 51, the transmission / reception circuit 52, the antenna 53, and the home memory 41. have.

In this case, the map data stored in the home memory 41 and the map data memory 54 is not only a map as a picture, but also latitude, longitude, altitude, place name, building name, town name, river, bridge in the map. Geographical information such as a store name and a street address is associated with a predetermined point on the map.

The mobile telephone 6 is wirelessly connected to such a plurality of base stations 5. In this case, the mobile telephone 6 may be a vehicle-mounted type or a portable type carried by the user himself.
(Global Positioning System
m) The receiver 8 is connected.

FIG. 2 shows a schematic structure of such a mobile telephone 6.

In this case, 61 is an antenna, and a high frequency section 62 is connected to the antenna 61. The high frequency unit 62 performs frequency conversion processing, and includes an antenna switch unit 621, a receiving unit 622, a transmitting unit 623, and a PL.
It has an L synthesizer 624.

Here, the antenna switch section 621 receives the input signal from the antenna 61 to the receiving section 622 and the transmitting section 6
The output signal from 23 is distributed to the antenna 61, respectively. The reception unit 622 receives the reception signal input from the antenna 61 via the antenna switch unit 621.
Convert frequency from 1.9GHz to 1 by stage mixer
An IF signal of 50 to 250 MHz and 10 MHz is generated. The transmitter 623 frequency-converts a π / 4-shifted QPSK modulated wave input from a modem 63, which will be described later, into 1.9 GHz by a mixer, and outputs the converted wave to the antenna 61 via the antenna switch unit 621. Then, the PLL synthesizer 624 performs local oscillation for frequency conversion in the receiving unit 622 and the transmitting unit 623.

The high frequency section 62 is provided with a modem 63,
TDMA64, speech codec 65 and PCM
66 is connected, and a speaker 68 on the receiving side and a microphone 69 on the transmitting side are connected to the PCM 66 via an amplifier 67.

Here, the modem 63 uses a π / 4 shift QP
SK modulation and demodulation processing is performed.
The IF signal from 22 is demodulated and separated into IQ data,
The data is transferred to the TDMA 64 as a data string, and on the transmission side, IQ data is created from the data transferred from the TDMA 64, π / 4 shift QPSK modulation is performed, and the result is sent to the transmission unit 623.

The TDMA 64 performs frame synchronization and slot format processing. On the receiving side, a slot is taken out from the data (frame) sent from the modem 63 at a predetermined timing, descrambled, and the like. The configuration data is taken out from the above format, the control data is sent to the control unit 70 which will be described later, the voice data is transferred to the speech codec 65, and the transmitting side sends the control data to the voice data transferred from the speech codec 65. A slot is added to create a slot, scrambled, inserted into a frame at a predetermined timing, and transferred to the modem 63.

If the image data is extracted or injected from the slot instead of the audio data, the image data can be transmitted and received.

The speech codec 65 performs compression / expansion processing of digital data.
PCM audio signal sent from MA64 (4 bit x
8KHz = 32Kbps, ADPCM audio signal (8b
(it × 8 KHz = 64 Kbps), the data is decompressed by decompressing and output to the PCM 66.
The ADPCM audio signal sent from the D.6 is compressed by being encoded into the PCM audio signal and sent to the TDMA 64.

The PCM 66 performs analog / digital processing. On the receiving side, the PCM audio signal sent from the speech codec 65 is D / A converted to output an analog signal to the amplifier 67 to drive the speaker 68. Also, on the transmitting side, the analog voice signal input from the microphone 69 is A / D converted and the PCM voice signal is output to the speech codec 65. In addition, this PCM66 is a volume, ringer,
It also controls tone signals.

The high frequency section 62 and the modem 6
3, TDMA64, speech codec 65 and P
A control unit 70 is connected to the CM 66, and the control unit 70 is connected to the CM 66.
ROM 71, RAM 72, recording / reproducing circuit 73, memory 7
4, display unit 75, key input unit 76, and connector 77
Are connected.

Here, the ROM 61 stores the control program in the control unit 70. Also, the RAM 72
In addition to temporarily storing the data handled by the control of the control unit 70, it also stores the map data of the service area sent from the base station 5 described above.

The recording / reproducing circuit 73 is for recording / reproducing a message when it is used as an answering machine. Memory 74
Is for storing typical messages and the like when used as an answering machine.

The display section 75 displays input data for various controls, results, and the like, and also displays map data stored in the RAM 72. in this case,
The display on the display unit 75 is enlarged by an instruction from the control unit 70,
You can freely reduce the size, you can select an appropriate scale, and you can use the search function to display the destination,
The route to the destination can also be displayed.

The key input section 76 is adapted to give a key input for setting various functions to the control section 70. In this case, the key input unit 76 operates to access the home memory 41 of the network management station 4 of the mobile telephone network 3 to the base station 5 and read out desired map data when the destination is far away. I also have a key.

The connector 77 is for connecting the GPS receiver 8 described below.

Here, GPS means orbital altitude 20123
Six orbits are set above Km, and a total of 18 satellites are launched in each of these 3 orbits. Time information, orbital data, and one-way distance data from atomic satellites are transmitted from each satellite. By placing 3 to 4 satellites in the coverage area at all times,
Based on the distance to each satellite and the accurate position data of each satellite, it is possible to calculate one's position by the principle of triangulation.

FIG. 3 shows a schematic structure of such a GPS receiver 8.

In this case, 81 is an antenna, and a demodulation section 83 is connected to this antenna 81 via a receiving section 82. The demodulation unit 83 receives the distance data a, the 50 baud data b, the Doppler data c from the input signal from the antenna 81.
To demodulate.

A positioning calculation processing section 84 is connected to the demodulation section 83. The positioning calculation processing unit 84 calculates the position data d from the calculation process of the distance data a, the 50 baud data b, and the Doppler data c provided from the demodulation unit 83, and the position data d is transmitted via the connector 85 as described above. It is applied to the connector 77 on the side of the mobile phone 6 that has been used.

Since the signal from the satellite is directly spread-modulated and the modulation code is different for each satellite, the predetermined code is specified by the code setting of the code setting unit 86.

Next, the operation of the embodiment configured as described above will be described.

First, the procedure for receiving map data by the mobile telephone 6 will be described with reference to the flowchart shown in FIG.

In this case, when the mobile telephone 6 performs a call operation for a link establishment request in step 401 and the base station 5 accepts the link confirmation request in step 501, the ID of the mobile telephone 6 sent in step 502. Match. Further, the mobile telephone 6 verifies the public ID sent in step 402, while the mobile telephone network 3 operates in step 60.
In step 1, the network management station 4 is instructed to check the ID, and in step 701, the network management station 4 checks the ID by the contractor management unit 43.

When the ID verification is successful, the mobile telephone 6 establishes a wireless link in step 403 and the base station 5 establishes a wireless link in step 503.

From this state, the mobile telephone 6 executes the step 4
When the positioning mode service is requested in 04 and the base station 5 accepts the positioning mode service in step 504, the mobile telephone network 3 instructs the network management station 4 to verify the service subscriber in step 602, and the network management station 4 In step 702, the contractor management unit 43 checks the service subscriber.

When the inquiry of the service subscriber is successful, the base station 5 sends a map data read request to the map data memory 54 in steps 505 and 506, and transmits the map data to the mobile telephone 6. As a result, the mobile phone 6 receives the map data from the base station 5 in step 405, and R receives the map data in step 406.
Write to AM72.

Thereafter, when the mobile telephone 6 releases the wireless link in step 407, the base station 5 also releases the wireless link in step 507. Then, the mobile telephone network 3 calculates the service charge and updates the charge in step 603.
In step 702, the network management station 4 causes the charging management unit 42 to calculate the service charge and update the charge data.

Next, the procedure for searching the map data by the mobile telephone 6 will be described with reference to the flowchart shown in FIG.

In this case, when the mobile phone 6 is instructed to search the map data, the map data is read from the RAM 72 in step 408, and the display unit 75 is read in step 409.
To display.

Then, in step 410, the GPS receiver 8
When the GPS receiver 8 requests the calculation of the position data and instructs the position display, the GPS receiver 8 receives the input signal from the antenna 81 shown in FIG.
The distance data a, the 50 baud data b, and the Doppler data c are demodulated, and the positioning calculation processing unit 84 calculates the position data d and outputs the position data d to the mobile phone 6. As a result, the mobile telephone 6 displays the position data in step 412 so as to overlap the map data on the display unit 75,
In step 413, one's position is specified, and the route is instructed to determine the shortest route from the local point to the destination and display it on the map.

Next, the procedure for updating the map data in the base station 5 will be described with reference to the flowchart shown in FIG.

In this case, the network management station 4 executes the step 704.
When the map data of the home memory 41 is updated at step S4, the mobile telephone network 3 outputs a message of map data update at step 604, and the base station 5 accepts the map data update at step 508.

In this state, the mobile telephone network 3 executes step 7
The latest map data of the home memory 41 of 05 is taken out,
In step 605, this latest map data is transmitted to the base station 5. In step 509, the base station 5 receives the latest map data and instructs the RAM 72 to update the map data,
At step 510, the map data in the RAM 72 is updated to the latest one.

Next, the procedure for obtaining map data from the mobile telephone 6 to the destination will be described with reference to the flowchart shown in FIG.

In this case, when the mobile telephone 6 performs a call origination operation for a link establishment request in step 414 and the base station 5 accepts the link confirmation request in step 511, the ID of the mobile telephone 6 sent in step 512 is sent. Match.

The mobile telephone 6 also verifies the public ID sent in step 415, while the mobile telephone network 3
However, in step 606, the network management station 4 is instructed to verify the ID,
The network management station 4 performs an ID check by the contractor management unit 43 in step 706.

When the ID verification is successful, the mobile telephone 6 establishes a wireless link in step 416 and the base station 5 establishes a wireless link in step 513.

From this state, the mobile telephone 6 executes the step 4
When the positioning mode service is requested in 17 and the base station 5 accepts the positioning mode service in step 514, the mobile telephone network 3 instructs the network management station 4 to verify service subscribers in step 607, and the network management station 4 In step 707, the contractor management unit 43 checks the service subscriber.

When the inquiry of the service subscriber is successful, the base station 5 sends a map data read request to the map data memory 54 in steps 515 and 516, and transmits the map data to the mobile telephone 6. As a result, the mobile phone 6 receives the map data from the base station 5 in step 418, and R receives the map data in step 419.
Write to AM72.

Further, the mobile telephone 6 displays the map data on the display unit 75 in step 420. Next, in step 421, the GPS receiving unit 8 is requested to calculate the position data, and when the display on the map is instructed, the GPS receiving unit 8 calculates the position data d in step 422.
By outputting this position data d to the mobile phone 6,
In the mobile telephone 6, the position data is overlaid and displayed on the map data on the display unit 75 in step 423.

After that, when the mobile telephone 6 requests the map data of the desired point A in step 424, the base station 5 requests the map data of the point A to the mobile telephone network 3 in step 517. . Then, in step 608, the mobile telephone network 3 instructs the home memory 41 of the network management station 4 to search for map data up to the point A, and the network management station 4
In step 708, the map data of the point A in the home memory 41 is searched, and in step 709, the corresponding map data is sequentially output.

When the base station 5 sequentially receives the map data from the mobile telephone network 3 in step 518, the base station 5 writes the data in the map data memory 54 in step 516 and sends it to the mobile telephone 6 sequentially. As a result, the mobile telephone 6 sequentially receives the map data up to the point A in step 425, and the RAM 7 in step 419.
Write to 2.

Thereafter, when the mobile telephone 6 releases the wireless link in step 426, the base station 5 also releases the wireless link in step 519. Then, the mobile telephone network 3 calculates the service charge in step 610, instructs the network management station 4 to update the charge in step 611, and the network management station 4 updates the charge data by the charging management unit 42 in step 710. .

On the other hand, when the mobile telephone 6 requests the GPS receiver 8 to calculate the position data in step 427 and instructs the display on the map, the GPS receiver 8 outputs the position data d in step 422. By calculating and outputting this position data d to the mobile phone 6, the mobile phone 6 displays the position data in a superimposed manner on the map data of the display unit 75 in step 423. When the position is specified and the route is designated in step 413, the shortest route from the local point to the destination is determined and displayed on the map.

Therefore, in this way, the base station 5 has the map data memory 54 for storing the map data of the area covered by the base station 5, and the mobile telephone 6 detects the position data of the mobile telephone. It has a GPS receiver 8 and a display section 75 for displaying map data sent from the base station 5, and the map data displayed on this display section 75 is combined with the position data detected by the GPS receiver 8. Since the mobile phone user can easily identify the position where he / she is present from the display of the display section 75, this allows the other party to be notified of his / her whereabouts. , It will be possible to reach the desired place smoothly.

When the mobile phone 6 makes a request for the map data of the desired point A, the map data in the home memory 41 of the network management station 4 is searched, the corresponding data is read, and this is read by the mobile phone 6. Since it can be stored in the RAM 72 and can be displayed on the display unit 75, map data of a desired point can be easily obtained and the range of use of the mobile phone can be further expanded.

(Second Embodiment) FIG. 8 shows a schematic configuration of the second embodiment. In this case, in the first embodiment,
Although the GPS receiver 8 was connected to the mobile telephone 6, the GPS receiver 8 is not connected in this embodiment. Since other configurations are the same as those in FIG. 1 described above, the same portions are denoted by the same reference numerals and the description thereof is omitted.

The mobile telephone 6 is the same as that of FIG. 2 described above, but the mobile telephone 6 here uses the key input unit 76 as a search word for the map data displayed on the display unit 75. For example, by inputting the name of a building in the vicinity, the entire area of the relevant point is marked. Also, by instructing the enlarged display of this point, the user's position can be specified.

Next, the operation of the embodiment configured as described above will be described.

In this case, the procedure for receiving the map data by the mobile telephone 6 and the procedure for updating the map data at the base station 5 are the same as those in FIG. 4 and FIG. 6 described above, and therefore description thereof is omitted here.

Next, the procedure for searching the map data by the mobile telephone 6 will be described with reference to the flowchart shown in FIG.

In this case, when the mobile phone 6 is instructed to search the map data, the map data is read from the RAM 72 in step 429 and the display unit 75 is read in step 430.
To display.

From this state, in step 431, for example, the name of a nearby building that serves as a mark is input as a search word to the display map data to instruct the position display. Then, map data marking the entire area corresponding to the search word is displayed on the display unit 75 in step 432. Further, from this state, when the position identification is instructed in step 413, the own position is identified by the enlarged display of the spot.

Next, the procedure for obtaining map data from the mobile telephone 6 to the destination will be described with reference to the flowchart shown in FIG.

In this case, step 434 in the mobile telephone 6
From step 446 to step 414 of FIG. 7 described above.
From step 428 to step 428, the map data received in step 438 and displayed on the display unit 75 is changed to the display map data in step 440.
For example, the name of a nearby building that serves as a mark is input as a search word to instruct the position display. Then, map data marking the entire area corresponding to the search word is displayed on the display unit 75 in step 441. Then, after step 442, the target map data of the point A is requested.

Also, in this case, step 5 in the base station 5
20 to step 528, step 6 in mobile telephone network 3
12 to step 617, step 71 in the network management station 4
The steps 1 to 715 are similar to the steps 511 to 519 in the base station 5, the steps 602 to 611 in the mobile telephone network 3, and the steps 706 to 710 in the network management station 4 in FIG. Therefore, the description is omitted here.

Therefore, in this way, the base station 5
The mobile phone 6 has a map data memory 54 for storing map data of the area covered by the base station, and when the mobile phone 6 inputs a search word to the display unit 75 which displays the map data sent from the base station 5, this search is performed. Since the point on the map data corresponding to the word can be marked, in this case also, the mobile phone user can easily identify the position where he / she is present from the display of the display unit 75, which allows the other party to call. Not only will you be able to tell where you are, but you will also be able to reach your desired place smoothly.

When the mobile telephone 6 makes a request for the map data of the desired point A, the map data in the home memory 41 of the network management station 4 is searched again, and the corresponding data is read out. Since this can be displayed on the display unit 75 of the mobile phone 6, the same effect as described above can be expected.

The present invention is not limited to the above-mentioned embodiments, and can be carried out by appropriately modifying it within the scope of the invention. For example, although the GPS receiver is used in the above-described first embodiment, INS (Inertial Navigator) is used.
It is also possible to apply a system such as a position system, VICS (road traffic information system), AVM (automatic vehicle position display system), and the like. In the above-mentioned embodiment, the present position of the user is displayed on the map data, but it is also possible to use voice to provide guidance. Further, in the first or second embodiment, the map data covering the service area is stored in the management station that manages the base station and the base station of the entire network. The management station is located between the base station and the management station. An intermediate management station that manages a smaller number of base stations may be provided, and the intermediate management station may store map data corresponding to the service area covered by the intermediate management station. Further, map data covering the service area is stored only in these management stations and intermediate management stations, and when a mobile phone requests map data via the base station, these management stations and intermediate management stations are stored. The map data covered by the base station to which the mobile phone is connected may be cut out from the map data stored in and transmitted.

[0076]

According to the present invention, the mobile telephone can display the map data of the area covered by the base station sent from the base station and the position data detected for the mobile telephone in combination. As a result, it is possible for the mobile phone user to easily identify the position where he / she is present, so that the other party can be notified of his / her whereabouts, and the user can smoothly reach the intended place.

Further, according to the present invention, in the mobile telephone, by inputting the search word to the map data of the area covered by the base station, which is transmitted from the base station, the map data corresponding to this search word is displayed. Since it is possible to mark the point of, it is possible for the mobile phone user to easily identify the position where he / she is present, and thus it is possible to inform the other party of the call where he / she is. It will be possible to reach the place smoothly.

Further, according to the present invention, when an instruction to search the map data of a desired point is issued, the corresponding map data is searched from the map data of the area covering the entire mobile telephone network of the network management station, and the base station is searched. Since the data can be displayed on the display means of the mobile phone via the mobile phone, the map data of the desired point can be easily obtained, and the range of use of the mobile phone can be further expanded.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a mobile phone according to the first embodiment.

FIG. 3 is a diagram showing a schematic configuration of a GPS receiver of the first embodiment.

FIG. 4 is a flowchart for explaining the operation of the first embodiment.

FIG. 5 is a flowchart for explaining the operation of the first embodiment.

FIG. 6 is a flowchart for explaining the operation of the first embodiment.

FIG. 7 is a flowchart for explaining the operation of the first embodiment.

FIG. 8 is a diagram showing a schematic configuration of a second embodiment of the present invention.

FIG. 9 is a flowchart for explaining the operation of the second embodiment.

FIG. 10 is a flowchart for explaining the operation of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Public telephone network, 2 ... Fixed telephone, 3 ... Mobile telephone network, 4 ... Network management station, 41 ... Home memory, 42 ... Billing management section, 43 ... Contractor management section, 5 ... Base station, 51 ... Signal processing Circuits, 52 ... Transmitting / receiving circuit, 53 ... Antenna, 54 ... Map data memory, 6 ... Mobile phone, 8 ... GPS receiver, 81 ... Antenna, 82 ... Receiving section, 83 ... Demodulating section, 84 ... Positioning calculation processing section, 85 ... connector, 86 ... code setting part, 61 ... antenna, 62 ... high frequency part, 621 ... antenna switch part, 622 ... receiving part, 623 ... transmitting part, 624 ... PLL synthesizer, 63 ... modem, 64 ... TDMA, 65 ... speech. Codec, 66 ... PCM, 67 ... Amplifier, 68 ... Receiving side speaker, 69 ... Microphone, 70 ... Control unit, 71 ... ROM, 72 ... RAM, 73 ... Re-circuit, 74 ... memory.

Claims (3)

[Claims] 1. A mobile telephone system in which a plurality of base stations are connected to a mobile telephone network and a call from the mobile telephone enables the base station to talk with another telephone through the mobile telephone network. In the above, the base station has storage means for storing map data of an area covered by the base station, and the mobile phone includes position data detection means for detecting position data of the mobile phone, A display means for displaying the map data stored in the storage means to be sent is provided, and the map data displayed on the display means is combined with the position data detected by the position data detection means to be displayed. Mobile phone system characterized by. 2. A mobile telephone system in which a plurality of base stations are connected to a mobile telephone network and a call from the mobile telephone enables the base station to communicate with another telephone via the mobile telephone network. In the above, the base station has storage means for storing map data of an area covered by the base station, and the mobile telephone displays a map data stored in the storage means sent from the base station. Means and input means for inputting a search word to the map data displayed on the display means, and marking a point on the map data of the display means corresponding to the search word input by the input means. A mobile telephone system characterized in that 3. A network management station and a plurality of base stations are connected to a mobile telephone network to enable a call from a mobile telephone to be communicated with another telephone from the base station via the mobile telephone network. In the mobile telephone system described above, the network management station has storage means for storing map data of an area covering the entire service area, and the base station stores memory for storing map data of the area covered by the base station. The mobile phone has a display unit for displaying the map data stored in the storage unit sent from the base station, and a search instruction unit for instructing a search for map data at a desired point. In accordance with the search instruction of the search instruction means, the corresponding map data is searched from the storage means of the network management station, and the searched corresponding map data is stored in the storage means of the base station and stored in the storage means. Mobile telephone system which is characterized in that display 憶 been map data on the display means of the mobile telephone.