JPH01190136A - Mobile communication equipment - Google Patents

Abstract

PURPOSE:To avoid disabled communication at the outside of the service area by providing a means detecting the position of its own vehicle, a means storing the location of a base station in advance and a means displaying the position of its own vehicle and the service area of the base station. CONSTITUTION:When a display control computer CRT-ECU2 confirms the operating state of a telephone set, the automobile position information in this case is obtained from a navigation computer NAVI-ECU 3 and the ECU 2 displays it on a CRT display device 1. Then the service area of a base station 6 is shown in a circle with a prescribed radius taking its location as the center and the area including its own position is discriminated from the position data of the base station stored in advance by a ROM 4 and the area and the area of other base station in adjacent to the said area of a prescribed range are displayed. Thus, the event of disabled communication due to out of service area is avoided in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile communication device typified by a car telephone.

[Prior Art] Due to its convenience, car telephones have become popular in recent years, but the areas where they can be used are limited to the main parts of Japan covered by the service area of base stations.

Therefore, conventionally, a message is displayed inside the vehicle that the vehicle is outside the above-mentioned service area and is in a non-communicable area (for example, Japanese Patent Laid-Open No. 102634/1982).

[Problems to be Solved by the Invention] In the conventional mobile communication device described above, the result is only a notification that the device is in a communication unavailable area, so it is not possible to predict communication failure in advance, and it is not possible to predict communication failure in advance. There were problems in which the noise during a call increased, and the sound of a call was interrupted at the boundary between the area of one base station and the area of another base station. In particular, facsimile communication is sensitive to a drop in signal level, so there is a risk that communication abnormalities will occur frequently.

The present invention solves this problem by making it possible to predict in advance whether the vehicle will deviate from the base station service area during communication, and thereby prevent communication failure by stopping the own vehicle or selecting a different route. It is an object of the present invention to provide a mobile communication device that can prevent the above.

[Means for Solving the Problems] As shown in FIG. 1, a mobile communication device of the present invention includes a vehicle position detection means for detecting the position of a vehicle equipped with a mobile station communicating with a base station, and a vehicle position detection means for detecting the position of a vehicle equipped with a mobile station communicating with a base station; and display means for displaying the location of the vehicle and the service area of the base station within the vehicle.

The mobile communication device further includes a storage means for storing map information, as shown in FIG. 2, and the display means displays the position of the own vehicle and the service area of the base station on a map within the own vehicle. is set to be displayed.

[Operation] The display means simultaneously displays the location of the own vehicle and the service area of the base station, allowing the occupant to immediately determine in which area within the above area the own vehicle is located.

Further, when the position of the host vehicle and the service area of the base station are displayed on the map, it is also possible to determine which driving route to take.

[First Embodiment] In FIG. 3, a CR7 display device 1 is provided in the vehicle interior of the vehicle, and display information for the display device 1 is provided from a display control computer (CRT-ECU) 2. This CRT-ECU 2 includes a navigation computer (NAVI-ECU > 3) that outputs the vehicle position, and a compact disk (C
D) ROM4 is connected.

Furthermore, a telephone radio 5 is equipped, which sends and receives signals to and from the nearest base station 6 among the plurality of base stations, as well as transmits a signal indicating that the radio is in operation and the base station with which it is currently communicating. The station discrimination signal obtained from the station is sent to the above CRT-ECU2.
Output to.

Details of the three parts of the NAVI-ECU are shown in FIG.

A global positioning system (GPS) receiver 31, a geomagnetic sensor 32, and a mileage sensor 33 are connected to the NAVI-ECU 3, and both sensors 32
．． The driving position of the own vehicle is calculated by calibrating the signal of 33 using GPS and sending it to the CRT-ECU 2.

The operation of the above CRT-ECU 2 will be explained with reference to the flowchart in FIG. do. Since the service area of the base station 6 is indicated by a circle with a constant radius centered on its location, the service area that includes the vehicle's location is determined from the base station location data stored in the CD-ROM.
The service area and the service areas of other base stations within a certain range adjacent thereto are displayed.

Note that the service area to which the own army belongs is also confirmed by the station identification signal.

This situation is shown in FIG. 6 (1), where the own vehicle position is displayed as a rectangular bright spot (point
Other service areas 82 to Sll in a certain range adjacent to
is displayed. Note that the service area S1 is displayed in a different color from the other service areas 82 to Sll.

When the vehicle position moves and enters the adjacent service area S6, the color of the service area S6 into which the vehicle has newly entered changes, and the service area S1 from which the vehicle has escaped changes as shown in FIG. Service area S2~S5, S7~
It will be the same color as Sll.

In this way, the service area and vehicle position are displayed so that the occupants are always aware of their vehicle position within the service area, and are aware of the boundaries of the service area when the vehicle is proceeding outside the service area or when using a fax machine. It becomes possible to adjust vehicle operation so that vehicles do not pass through the area.

[Second Embodiment] Map information is stored in the CD-ROM 4, and as shown in Fig. 7, when using the telephone, the vehicle position (point X in the figure)
The base station service areas SL2 to S18 are shown on the map showing
By displaying these in an overlapping manner, it is possible to immediately judge which driving route to select, which is extremely convenient.

[Effects of the Invention] According to the configuration described in claim 1, the position of the own vehicle within the service area can be constantly confirmed, and a situation where communication becomes impossible due to leaving the service area can be avoided in advance.

According to the configuration recited in claim 2, in addition to the above effects, it is possible to immediately select a travel route that does not leave the service area.

[Brief explanation of the drawing]

Figures 1 and 2 are complaint correspondence diagrams, Figures 3 to 6 show a first embodiment of the present invention, Figure 3 is a block diagram showing the overall configuration of the communication device, and Figure 4 is a vehicle position diagram. A block diagram of the configuration of the calculation unit, FIG. 5 is an operation flowchart of the display control computer, and FIG. 6 is a diagram showing the display on the display screen.
FIG. 7 is a diagram showing the display on the display screen in the second embodiment of the present invention. 1... CRT display device (display means) 2... Display control computer 3... Navigation computer (vehicle position detection means) 4... Compact disk ROM (storage means) 5.
...Telephone radio (mobile station) 6...Base station Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7

Claims (2)

[Claims] (1) Vehicle position detection means for detecting the position of the own vehicle equipped with a mobile station that communicates with a base station, storage means for storing the position of the base station in advance, and the position of the own vehicle and the service area of the base station. A mobile communication device comprising: a display means for displaying in a vehicle. (2) In the mobile communication device according to claim 1, the mobile communication device further comprises a storage means for storing map information, and the display means displays the location of the own vehicle and the service area of the base station. It is set to be displayed on the map within.