JPH11220768A - Mobile object communication terminal and communication method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile object communication terminals and its communication method that is able to perform communications with a base station, while reducing the generation rate of communication errors, even if it is not in a GPS reception enable area. SOLUTION: This device has an electric field strength detection part 10 for detecting the strength of an electric field, an out-of-area deterction part 11 for detecting a state of being outside an area and a CPU 14 which generates communication state data at a present point on the basis of the electric field strength detected by the detection part 10 and the state outside of the area detected by the detection part 11, stores in a memory 7 these communication state data by coordinating them to location data of a GPS and controls communications, on the basis of the location data being stored in this memory 7 and the communication state data. Thus, it is determined that an reception environment with a base station is superior if, for example, the electric field strength is sufficient and is inside of the area on the basis of the communication state data corresponding to the present location data even though the area is not in this GPS reception enable area; and it is possible to perform communications with the base station while reducing the generation rate of communication errors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a GPS receiver,
For example, the present invention relates to a mobile communication terminal device such as a vehicle-mounted communication terminal device in which a communication terminal such as a mobile phone, a PHS, or a digital MCA is mounted on a vehicle or the like, and the GPS receiver and the communication terminal are linked to each other, and a communication method thereof.

[0002]

2. Description of the Related Art Conventionally, as such a mobile communication terminal device, for example, one described in JP-A-6-85727 is known. FIG. 6 is a block diagram showing a schematic configuration inside a vehicle-mounted communication terminal device relating to a conventional mobile communication terminal device.

A vehicle-mounted communication terminal device 20 shown in FIG. 6 includes a radio 22 and a radio modem 23 for transmitting and receiving communication radio waves to and from a base station (not shown) via a receiving antenna 21.
Receiving GPS information from a satellite (not shown)
, And a GPS receiver 25 for detecting the current position of the own vehicle based on the GPS information, and a CPU 26 for controlling the entire on-vehicle communication terminal device 20.

According to the on-vehicle communication terminal device 20, when performing a communication operation with a base station, the communication operation with a satellite having strict reception conditions is executed. It determines that the reception environment is good and executes a communication operation with the base station.

[0005] The operation of communicating with the satellite corresponds to an operation of receiving GPS information from the satellite via the GPS receiver 25 inside the in-vehicle communication terminal device 20.

That is, such a vehicle-mounted communication terminal device 2
According to 0, the communication operation with the satellite is performed, and if the communication operation with the satellite is not established, it is determined that the reception environment is bad, and the communication operation with the base station is not performed. As a result, the rate of occurrence of communication errors with the base station can be significantly reduced.

[0007]

However, according to the above-mentioned conventional in-vehicle communication terminal device 20, when the communication operation with the satellite is not established, that is, the GPS information from the satellite cannot be received. In such a case, the communication operation with the base station at the current location was not performed.
A point where GPS information can be received despite the fact that communication with the base station is possible at this current point,
That is, there is a first problem that the user has to move to the GPS receivable area, which is extremely inconvenient.

[0008] Further, since the GPS receivable area cannot be grasped in advance on the map screen, a large amount of time is required to search for the GPS receivable area, which is very inefficient. was there.

The present invention has been made in view of the first problem, and a first object of the present invention is to provide a GPS.
It is an object of the present invention to provide a mobile communication terminal device and a communication method thereof that can perform a communication operation with a base station while reducing the rate of occurrence of a communication error even in a non-coverage area.

The present invention has been made in view of the above-mentioned second problem, and a second object of the present invention is to provide:
It is an object of the present invention to provide a mobile communication terminal device capable of recognizing a communicable area with a base station on a screen, and a communication method therefor.

[0011]

In order to achieve the first object, a mobile communication terminal according to the present invention comprises: an electric field strength detecting means for detecting an electric field strength; and an out-of-service state detecting means for detecting an out-of-service state. Communication status data generating means for generating communication status data relating to the communication status of the current location based on the electric field strength detected by the electric field strength detecting means and the out-of-service state detected by the out-of-service state detecting means; A control for storing communication status data generated by the status data generating unit in the storage unit in association with GPS location data, and controlling a communication operation based on the location data and the communication status data stored in the storage unit. Means.

Therefore, according to the mobile communication terminal of the present invention, the communication status data generated based on the electric field strength and the out-of-service state is stored in the storage means in association with the location data, and stored in the storage means. Since the communication operation is controlled based on the inside location data and the communication status data, based on the communication status data corresponding to the current location data, for example, if the electric field strength is good and if it is within a service area, Even if the area is not the GPS coverage area, it is possible to determine that the reception environment with the base station is good and perform the communication operation with the base station while reducing the rate of occurrence of communication errors.

According to a second aspect of the present invention, there is provided a mobile communication terminal device according to the present invention, in addition to the configuration of the mobile communication terminal device according to the first aspect, further comprising: The communication-disabled points relating to the situation data are displayed on the map screen of the display means.

Therefore, according to the mobile communication terminal device of the present invention, a communication impossible point relating to the communication status data stored in the storage means is displayed on the map screen of the display means on the screen, so that the user can display the information. In performing the communication operation with the base station, the communicable area with the base station can be recognized on the screen.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mobile communication terminal according to a first aspect of the present invention includes an electric field intensity detecting means for detecting an electric field intensity, an out-of-service state detecting means for detecting an out-of-service state, and the electric field strength detecting means. Communication status data generation means for generating communication status data relating to the communication status at the current location based on the electric field strength detected by the communication device and the out-of-service state detected by the out-of-service status detection device; Control means for controlling the communication operation based on the location data and the communication status data stored in the storage means, while storing the communication status data thus obtained in association with the GPS location data. And

The mobile communication terminal is, for example, a GP.
It corresponds to, for example, an in-vehicle communication terminal device in which an S receiver, a mobile communication terminal such as a mobile phone, and the like are mounted on a vehicle and the GPS receiver and the mobile communication terminal are linked.

The electric field intensity detecting means corresponds to, for example, an electric field intensity detecting unit for detecting an electric field intensity obtained by a communication operation with a base station.

The out-of-service state detection means corresponds to, for example, an out-of-service state detection unit for detecting and recognizing an out-of-service area corresponding to a communication operation range with a base station or an out-of-service area corresponding to out of a communication operation range with a base station. is there.

When the electric field intensity detected by the electric field intensity detecting means is equal to or higher than a reference level and the out-of-service state detecting means detects that the electric field intensity is within the service area, the communication status data generating means communicates at the current location. When the situation data is generated as OK and the electric field strength detected by the electric field strength detecting means is lower than a reference level or when the out-of-service state detecting means detects out of service, the communication situation data at the current location is This is equivalent to a CPU generated as NG.

The storage means corresponds to a memory for storing location data at the current location and communication status data corresponding to the location data.

The control means stores the communication status data generated by the communication status data generation means in the storage means in association with the location data of the current location. Corresponds to a CPU that controls a communication operation based on the location data and the communication status data stored in the storage means.

Therefore, according to the first aspect of the present invention, the communication status data generated based on the electric field strength and the out-of-service state is stored in the storage means in association with the location data. Since the communication operation is controlled based on the location data and the communication status data stored in the storage means, for example, based on the communication status data corresponding to the location data of the current location, the electric field strength is good, If so, it is possible to judge that the reception environment with the base station is good and perform the communication operation with the base station while reducing the communication error rate, even if it is not the GPS receivable area. .

That is, the communication status data obtained in the past communication is stored in the storage means in association with the GPS location data, and whether or not communication is possible is determined based on the communication status data. Alternatively, since communication is performed only when there is a vehicle in the area, communication from an out-of-service state is eliminated, which can reduce communication time and greatly reduce communication cost associated therewith. it can.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, there is provided a mobile communication terminal device comprising: a line disconnection detecting means for detecting a line disconnection; A data error detection unit for detecting an error, wherein the communication status data generation unit is configured to detect a current error based on a line disconnection detected by the line disconnection detection unit or a communication data error detected by the data error detection unit. It is characterized by generating communication status data relating to the communication status of a point.

The line disconnection detecting means corresponds to, for example, a line disconnection detecting unit for detecting a line disconnection during communication with a base station.

The data error detecting means corresponds to, for example, a communication error detecting section for detecting a communication data error.

[0027] The communication status data generating means, when a line disconnection is detected by the line disconnection detecting means, or when a communication data error is detected by the data error detecting means,
The communication status data is generated as NG based on the line disconnection or the communication data error.

Therefore, according to the second aspect of the present invention, the communication status data relating to the communication status at the current point is stored in the storage means based on the line disconnection or the communication data error. Therefore, the rate of occurrence of communication errors can be reduced more reliably, and the communication operation with the base station can be performed.

According to a third aspect of the present invention, there is provided a mobile communication terminal device according to the first or second aspect, further comprising a communication unit for communicating each point stored in the storage means. The status data is communication status data for each point or area based on the GPS location data.

Therefore, according to the mobile communication terminal device of the present invention, since the communication status data is stored for each point or area unit based on the location data, the point or area based on the location data is stored. A communication operation at a communicable point or area can be controlled for each unit.

According to a fourth aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the first or second aspect, the control means stores the data in the storage means. The communication status data is cleared after a predetermined time has elapsed.

According to a fifth aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the third aspect, the control means further comprises: The status data is cleared after a predetermined time has elapsed.

Therefore, according to the mobile communication terminal device of the present invention, even if it is a point or area stored as a non-communicable point or a non-communicable area, communication is performed again after a predetermined time has elapsed. It is possible to deal with the situation that the task can be performed.

According to a sixth aspect of the present invention, in the mobile communication terminal device according to the present invention, in addition to the configuration of the mobile communication terminal device according to the first, second or fifth aspect, the control means includes: It is characterized in that a communication operation is not started at a non-communicable point related to the stored communication status data.

According to a seventh aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the third aspect, the control means further comprises: It is characterized in that a communication operation at a communication impossible point related to the situation data is not started.

According to the mobile communication terminal device of the present invention, in addition to the configuration of the mobile communication terminal device of the above-mentioned claim, the control means may further comprise a communication unit stored in the storage unit. It is characterized in that a communication operation at a communication impossible point related to the situation data is not started.

The point where communication is not possible with respect to the communication status data corresponds to a point where communication with the base station cannot be performed. For example, a point where communication status data is generated as NG by the communication status data generating means. Is equivalent to

Therefore, according to the mobile communication terminal device of the present invention, it is possible to prevent the start of the communication operation at the non-communicable point related to the communication status data stored in the storage means. Therefore, that is, it is determined that the reception environment with the base station is poor, and it is possible to reliably prevent the occurrence of a communication error.

According to a ninth aspect of the present invention, in addition to the configuration of the mobile communication terminal of the first, second, fifth, seventh or eighth aspect, the control means further comprises: A non-communicable point related to the communication status data stored in the storage means is displayed on a map screen of a display means on a screen.

According to a tenth aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the third aspect, the control means further comprises: A communication-disabled point relating to the situation data is displayed on the map screen of the display means on a screen.

According to a eleventh aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the fourth aspect, the control means further comprises: A communication-disabled point relating to the situation data is displayed on the map screen of the display means on a screen.

According to a twelfth aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the sixth aspect, the control means further comprises: A communication-disabled point relating to the situation data is displayed on the map screen of the display means on a screen.

The display means corresponds to, for example, a display unit of a navigation system.

Therefore, claims 9 and 10 in the present invention
According to the mobile communication terminal device described in 11 or 12, the incommunicable point relating to the communication status data stored in the storage means is displayed on the map screen of the display means on the screen.
The user can recognize on the map screen whether or not the user is at a communication impossible point, that is, the user can easily recognize a place where stable communication is performed. As a result, communication quality can be improved, and unnecessary communication processing can be eliminated, so that communication time and communication cost can be significantly reduced.

The mobile communication terminal device according to claim 13 of the present invention provides the mobile communication terminal device according to claims 1, 2, 5, 7, 8,
In addition to the configuration of the mobile communication terminal device described in 10, 11, or 12, the control unit may further include a route on a map screen of a display unit toward a communicable point based on communication status data stored in the storage unit. It is characterized by providing guidance.

According to a fourteenth aspect of the present invention, in addition to the configuration of the mobile communication terminal according to the third aspect, the control unit further comprises a communication unit storing the communication stored in the storage unit. The route guidance is provided on the map screen of the display means toward the communicable point based on the situation data.

According to a fifteenth aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the fourth aspect, the control means further comprises: The route guidance is provided on the map screen of the display means toward the communicable point based on the situation data.

According to a sixteenth aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the sixth aspect, the control means further comprises: The route guidance is provided on the map screen of the display means toward the communicable point based on the situation data.

According to a seventeenth aspect of the present invention, in the mobile communication terminal of the present invention, in addition to the configuration of the mobile communication terminal of the ninth aspect, the control means further comprises a communication unit which is stored in the storage means. The route guidance is provided on the map screen of the display means toward the communicable point based on the situation data.

Therefore, claims 13 and 1 of the present invention.
According to the mobile communication terminal device described in 4, 15, 16 or 17, since the route guidance is provided on the map screen of the display means toward the communicable point based on the communication status data stored in the storage means. In addition, even if the user is at a communication impossible point, the user can move the vehicle to the communication possible point easily and in a short time by moving the vehicle by guiding route guidance to the communication possible point on the map screen. As a result, communication efficiency can be greatly improved, and useless labor for searching for a communicable point is not used.

In the communication method for a mobile communication terminal device according to claim 18 of the present invention, when a communication condition relating to the electric field strength and the out-of-service state of the current location is detected, the communication method of the current location is determined based on the electric field strength and the out-of-service state. Communication status data relating to the communication status is generated, and the communication status data is stored in the storage unit in association with the GPS location data, and the communication operation is performed based on the location data and the communication status data stored in the storage unit. It is characterized by controlling. The description of the same configuration and operation as those of the mobile communication terminal according to the first aspect of the present invention will be omitted.

Therefore, according to the communication method of the mobile communication terminal device of the present invention, the communication status data generated based on the electric field strength and the out-of-service state is stored in the storage means in association with the location data. Along with
Since the communication operation is controlled based on the location data and the communication status data stored in the storage means, for example, based on the communication status data corresponding to the location data of the current location, the electric field strength is good, If so, it is possible to judge that the reception environment with the base station is good and perform the communication operation with the base station while reducing the communication error rate, even if it is not the GPS receivable area. .

That is, the communication status data obtained in the past communication is stored in the storage means in association with the GPS location data, and whether or not communication is possible is determined based on the communication status data. Alternatively, since communication is performed only when there is a vehicle in the area, communication from an out-of-service state is eliminated, thereby reducing communication time and significantly reducing communication cost. .

Further, according to the communication method of the mobile communication terminal device according to claim 19 of the present invention, the above-mentioned claim 18 is provided.
In addition to the communication method of the mobile communication terminal device described above, when detecting a communication state related to a line disconnection or a communication data error at the current point, the communication state data relating to the line disconnection or a communication data error is generated, and the communication state data is generated. Is stored in the storage means in association with GPS location data. The description of the same configuration and operation as those of the mobile communication terminal according to the second aspect of the present invention will be omitted.

Therefore, according to the communication method of the mobile communication terminal device according to the nineteenth aspect of the present invention, communication status data relating to the communication status at the current location is stored in the storage means based on the line disconnection or the communication data error. So,
The communication operation with the base station can be executed while reliably reducing the communication error occurrence rate.

Further, the communication method of the mobile communication terminal device according to claim 20 of the present invention is the communication method of claim 18 or 1.
9. In addition to the communication method of the mobile communication terminal device according to 9, the communication status data of each point stored in the storage means is communication status data for each point or area based on the GPS location data. And The description of the same configuration and operation as those of the mobile communication terminal according to the third aspect of the present invention will be omitted.

Therefore, according to the communication method of the mobile communication terminal device of the present invention, the communication status data is stored for each point or area unit based on the location data. The communication operation at the communicable point or area can be controlled for each point or area unit.

The communication method for a mobile communication terminal device according to claim 21 of the present invention is the same as that of claim 18 or 1.
In addition to the communication method of the mobile communication terminal device described in Item 9, the communication status data stored in the storage means is cleared after a predetermined time has elapsed.

A communication method for a mobile communication terminal according to a twenty-second aspect of the present invention is the communication method for a mobile communication terminal according to the twentieth aspect. The data is cleared after a predetermined time has elapsed. Incidentally, claim 4 of the present invention.
Or, the description of the configuration and operation overlapping with the mobile communication terminal device described in 5 will be omitted.

Therefore, claim 21 or claim 2 of the present invention.
According to the communication method of the mobile communication terminal device described in 2 above, it is possible to cope with a situation in which communication can be performed again after a predetermined time has elapsed even at a point or area stored as a non-communicable point or a non-communicable area. be able to.

The communication method of the mobile communication terminal device according to claim 23 of the present invention is the same as that of claims 18 and 19.
Or In addition to the communication method of the mobile communication terminal device according to the item 22, the communication operation is not started at a communication impossible point related to the communication status data stored in the storage means.

According to a twenty-fourth aspect of the present invention, in addition to the communication method of the mobile communication terminal according to the twentieth aspect, a communication status stored in the storage means is provided. It is characterized in that a communication operation at a communication impossible point relating to data is not started.

According to a twenty-fifth aspect of the present invention, in addition to the communication method of the mobile communication terminal according to the twenty-first aspect, a communication status stored in the storage means is provided. It is characterized in that a communication operation at a communication impossible point relating to data is not started. The description of the configuration and operation of the present invention that is the same as that of the mobile communication terminal according to the sixth, seventh, or eighth aspect of the present invention will be omitted.

Accordingly, claims 23 and 24 of the present invention.
Or, according to the communication method of the mobile communication terminal device according to 25, since the communication operation is not started at a non-communicable point related to the communication status data stored in the storage unit,
That is, it is determined that the reception environment with the base station is poor, and it is possible to reliably prevent the occurrence of a communication error.

Further, the communication method of the mobile communication terminal device according to claim 26 of the present invention provides the communication method of
In addition to the communication method of the mobile communication terminal device described in 9, 22, 24 or 25, a communication impossible point relating to communication status data stored in the storage means is displayed on a map screen of a display means on a screen. And

According to a twenty-seventh aspect of the present invention, in addition to the communication method of the mobile communication terminal according to the twentieth aspect, the communication status stored in the storage means is provided. A communication-disabled point relating to data is displayed on the map screen of the display means.

According to a twenty-eighth aspect of the present invention, in addition to the communication method of the mobile communication terminal according to the twenty-first aspect, a communication status stored in the storage means is provided. A communication-disabled point relating to data is displayed on the map screen of the display means.

According to a twenty-ninth aspect of the present invention, there is provided a communication method for a mobile communication terminal device according to the twenty-third aspect of the present invention, further comprising a communication status stored in the storage means. A communication-disabled point relating to data is displayed on the map screen of the display means.
It should be noted that the description of the same configuration and operation as those of the mobile communication terminal device according to the ninth, tenth, eleventh, or twelfth aspect of the present invention will be omitted.

Therefore, according to the present invention,
According to the communication method of the mobile communication terminal device described in 7, 28, or 29, the non-communicable point related to the communication status data stored in the storage means is displayed on the map screen of the display means on the screen. Can recognize on the map screen whether or not the user is in a communication impossible point, that is, it is possible to easily recognize a place where stable communication is performed. As a result, communication quality can be improved, and unnecessary communication processing can be eliminated, so that communication time and communication cost can be significantly reduced.

Further, the communication method of the mobile communication terminal device according to claim 30 of the present invention provides the communication method of claim 18,
In addition to the communication method of the mobile communication terminal device described in 9, 22, 24, 25, 27, 28 or 29, a map of the display means toward a communicable point based on the communication status data stored in the storage means. It is characterized by providing route guidance on the screen.

A communication method for a mobile communication terminal according to a thirty-first aspect of the present invention is the communication method for a mobile communication terminal according to the twentieth aspect. The route guidance is provided on a map screen of a display means toward a communicable point based on the data.

A communication method for a mobile communication terminal according to a thirty-second aspect of the present invention further includes a communication status stored in the storage means in addition to the communication method for a mobile communication terminal according to the twenty-first aspect. The route guidance is provided on a map screen of a display means toward a communicable point based on the data.

According to a thirty-third aspect of the present invention, in addition to the communication method of the mobile communication terminal according to the twenty-third aspect, a communication status stored in the storage means is provided. The route guidance is provided on a map screen of a display means toward a communicable point based on the data.

A communication method for a mobile communication terminal device according to a thirty-fourth aspect of the present invention further includes a communication status stored in the storage means in addition to the communication method for a mobile communication terminal device according to the twenty-sixth aspect. The route guidance is provided on a map screen of a display means toward a communicable point based on the data. It should be noted that, in the present invention, claims 13, 14, 15,
The description of the configuration and operation overlapping with those of the mobile communication terminal device described in 16 or 17 is omitted.

Therefore, claims 30 and 3 of the present invention
According to the communication method of the mobile communication terminal device described in 1, 32, 33 or 34, the route guidance is performed on the map screen of the display means toward the communicable point based on the communication status data stored in the storage means. Therefore, even if the user is in a communication impossible point, the user can move the vehicle to the communication possible point easily and in a short time by moving the vehicle by guiding route guidance to the communication possible point on the map screen. it can. As a result, communication efficiency can be greatly improved, and useless labor for searching for a communicable point is not used.

Hereinafter, a vehicle-mounted communication terminal device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration inside a vehicle-mounted communication terminal device showing an embodiment of the present invention.

A vehicle-mounted communication terminal device 1 shown in FIG. 1 includes a wireless device 4 for transmitting and receiving communication radio waves via a reception antenna 3 between a vehicle-mounted terminal 2 mounted on the vehicle and a base station (not shown). Radio modem 5 and GPS from satellite (not shown)
The GPS receiver 6 receives information via the receiving antenna 6a and detects the current position of the vehicle based on the GPS information.
And

The in-vehicle terminal 2 includes a memory 7 for storing various information data, a map database 8 for storing map data used in the navigation system, and a display unit 9 for displaying various information and a map screen on a screen. An electric field intensity detector 10 that detects electric field intensity based on communication radio waves with the base station via the radio device 4 and the radio device modem 5 and determines whether the electric field intensity is equal to or higher than a reference level. ,
An out-of-service state detection unit 11 that detects whether the communication area with the base station is in a service area or an out-of-service state outside the communication range;
It has a line disconnection detecting unit 12 that detects a line disconnection in a communication radio wave with a base station, a communication error detecting unit 13 that detects a communication data error, and a CPU 14 that controls the entire on-vehicle communication terminal device 1. .

The memory 7 stores the G corresponding to the current location.
The location data of the PS and communication status data, which will be described later, corresponding to the location data are stored in association with each other. The GPS corresponding to the current location
The identification of the location data is performed by a GPS system used in a normal navigation system.

The CPU 14 controls the electric field intensity detection unit 1
0 and the out-of-service state detection unit 11
Based on the out-of-coverage state detected at the step (a), communication status data indicating whether or not communication is possible at the current location is generated.

Further, when the line disconnection detecting unit 12 detects a line disconnection or the communication error detecting unit 13 detects a communication error, the CPU 14 generates communication status data indicating whether or not communication is possible at the current point. is there.

The communication status data generated by the CPU 14 is stored in the memory 7 in association with the location data of each point.

Further, based on the communication status data and the location data stored in the memory 7, the CPU 14 displays a communicable point (area) and a non-communicable point (area) of the radio device 4 with the base station. Can be displayed on a map screen.

Next, the operation of the in-vehicle communication terminal device 1 according to the present embodiment will be described. FIG. 2 is a flowchart showing the processing operation of CPU 14 in the location data update processing of in-vehicle communication terminal device 1 shown in the present embodiment.

The location data update processing is performed at the time of the area confirmation operation normally performed by the base station and the radio 4.
This is a process of storing or updating the communication status data relating to the current location in the memory 7.

In FIG. 2, CPU 14 executes an operation of acquiring location data indicating the current location via GPS receiver 6 (step S1), and determines whether or not location data corresponding to the current location has been acquired. (Step S2).

If the location data corresponding to the current point has been obtained, a communication operation with the base station is executed via the radio unit 4 and the radio modem 5, and the out-of-service state detection unit 11 It is determined whether the communication state with the base station is out of service (step S3). If the communication state is not the out-of-service state, the electric field strength detection unit 10 detects the electric field strength with the base station, and determines whether or not the electric field strength is equal to or higher than the reference level, that is, whether or not it is OK ( Step S4).

If the electric field strength with this base station is OK,
It is determined that the communication environment for the base station is good, and communication status data corresponding to the location data of the current location is generated as OK, and the location data of the current location is associated with the communication status data (OK). The data is stored in the memory 7 (step S5), and the processing operation of the location data update processing is terminated.

If the location data corresponding to the current point cannot be obtained in step S2, the processing operation of the location data update processing ends.

If the communication state is out of the service area in step S3, or if the electric field strength is not OK in step S4, it is determined that the communication environment for the base station is bad, and the location data of the current location is corresponded. The communication status data is generated as NG, the location data and the communication status data (NG) are stored in the memory 7 in association with each other (step S6), and the processing operation of the location data updating process ends.

In other words, according to the location data updating process shown in FIG. 2, during the area confirmation operation normally performed by the base station and the wireless device 4, the location data corresponding to the current location and the communication related to the current location are performed. The data is stored in the memory 7 in association with the situation data.

FIGS. 3 to 5 show the CPU 1 in the communication processing.
6 is a flowchart illustrating a processing operation of No. 4;

The communication process is a process for controlling the communication operation at the current position based on the location data and the communication status data stored in the memory 7 and for storing and updating the latest communication status data even during the communication operation. It is.

When the communication operation is started, the CPU 14 shown in FIG. 3 executes an operation of acquiring location data corresponding to the current location via the GPS receiver 6 (step S1).
0), it is determined whether or not the communication status data corresponding to the current location data is in the memory 7 (step S11). If there is communication status data corresponding to the current location data in the memory 7, it is determined whether or not the communication status data is OK (step S1).
2).

If the communication status data is OK, the communication operation is started via the wireless device 4 and the wireless modem 5 (step S13), and the map data corresponding to the location data of the current location is stored in the map database. 8, the map data relating to the current point is displayed on the screen based on the map data (step S14), and it is determined whether or not a communication end operation is detected (step S15).

If the communication end operation is detected, the communication operation is ended (step S16), and the processing operation of this communication processing is ended.

Further, if the communication status data corresponding to the current location data is not in the memory 7 in step S11, or if the communication status data is
If it is not K, that is, if it is NG, it is determined whether or not the current communication status is out of service (step S17).

If the current communication status is not the out-of-service state, the electric field strength with the base station is detected, and it is determined whether or not the electric field strength is OK (step S18). If the electric field strength is OK, the communication environment with the base station is determined to be good, the communication status data relating to the current location is generated as OK, and the location data of the current location and the communication status corresponding to the location data are generated. The data (OK) is stored in the memory 7 (Step S19), and Step S13
Move to

If the communication status is out of service in step S17 or the electric field strength is not OK in step S18, it is determined that the communication environment with the base station is poor, and M1 shown in FIG. Move to

If the communication end operation is not detected in step S15, the flow shifts to M2 shown in FIG.

In M1 shown in FIG. 4, it is determined that the communication environment with the base station is poor, and communication status data relating to the current location is generated as NG. Is stored in the memory 7 (step S20), and the communication operation with the base station by the radio 4 and the radio modem 5 is not executed (step S21).
Map database 8 based on this location data
The map data is read from the map data, and the non-communicable area and the communicable area are displayed on the map screen of the display unit 9 based on the map data (step S22), and the route from the non-communicable area as the current location to the communicable area is displayed. The guidance is executed (step S23), and the process proceeds to M3 shown in FIG.

In M2 shown in FIG. 5, it is determined whether the current communication status is out of service (step S30). If the current communication condition is not the out-of-service state, the electric field intensity in the current communication condition is detected, and it is determined whether or not the electric field intensity is OK (step S31). If the electric field strength is OK, it is determined whether or not the disconnection is detected by the disconnection detecting unit 12 (step S32).
If the line disconnection has not been detected, the communication error detector 13 determines whether a communication error has occurred (step S33).

If no communication error has occurred, GP
The S receiver 6 performs an operation of acquiring location data corresponding to the current location (step S34), and determines whether the location data corresponding to the current location has been acquired (step S35).

If the location data corresponding to the current location has been obtained, it is determined that the communication environment at the current location is good based on the determination results from step S30 to step S33, and the location of the current location is determined. The communication status data corresponding to the data is generated as OK, and the location data of the current location and the communication status data (OK) corresponding to the location data are stored in the memory 7 (step S36), and M shown in FIG.
Move to 4.

If the communication status is out of service at step S30, or if the electric field strength is OK at step S31.
If not, or if a line disconnection is detected in step S32, or if an occurrence of a communication error is detected in step S33, it is determined that the communication status is bad, and the GPS receiver 6 Then, an operation of acquiring the location data corresponding to the current location is executed (step S38), and it is determined whether or not the location data corresponding to the current location has been acquired (step S39).

If the location data corresponding to the current location has been acquired, the communication status data corresponding to the location data at the current location is generated as NG,
The location data of the current location and the communication status data (NG) corresponding to the location data are stored in the memory 7.
(Step S40), and it is determined whether or not to perform re-communication (step S41). If this re-communication is to be performed, the process moves to M3 shown in FIG.

If the location data corresponding to the current position has not been obtained in step S35,
To M4 shown in FIG.

If the location data corresponding to the current point has not been obtained in step S39, the process proceeds to step S41.

If re-communication is not to be performed in step S41, the processing operation in this communication process is terminated.

According to the present embodiment, when a communication operation is started, the current location is related to the current location based on the location data of the current location stored in memory 7 and the communication status data corresponding to the location data. Recognize the communication status, for example, if the communication status data is OK, determine that the communication environment with the base station is good, start the communication operation with the base station, and if the communication status data is NG, Since it is determined that the communication environment with the base station is bad and the communication operation with the base station is not performed, the communication operation with the base station can be performed while reducing the occurrence rate of the communication error. it can.

That is, the communication status data at the time of communication in the past is stored in the memory 7 in association with the GPS location data, and whether or not communication is possible is determined based on the communication status data. Alternatively, since communication is performed only when there is a vehicle in the area, communication from an out-of-service state is eliminated, thereby reducing communication time and significantly reducing communication cost. .

Further, according to the present embodiment, the non-communicable points or areas related to the communication status data stored in the memory 7 are displayed on the map screen of the display unit 9 on the screen, so that the user cannot communicate. It is possible to recognize on the map screen whether or not the user is at a point or an area, that is, it is possible to easily recognize a place where stable communication is performed. As a result, communication quality can be improved, and unnecessary communication processing can be eliminated, so that communication time and communication cost can be significantly reduced.

Further, according to the present embodiment, the route is guided on the map screen of the display unit 9 toward the communicable point based on the communication status data stored in the memory 7, so that the user can communicate. Even if the vehicle is in an impossible point or area, the vehicle can be moved to the communicable point easily and in a short time by moving the vehicle by guiding route guidance to the communicable point or area on the map screen. As a result, the communication efficiency can be greatly improved, and no useless labor for searching for a communicable point or area is used.

In the above embodiment, the location data and the communication status data corresponding to the location data are stored in the memory 7, and based on the communication status data stored in the memory 7, the radio device Although the communication operation with the base station is controlled, for example, even at a point or an area stored as a non-communicable point or a non-communicable area, a situation may be considered in which communication can be performed again after a predetermined time has elapsed. .

In order to cope with such a situation, the location data and the communication status data stored in the memory 7 may be cleared after a predetermined time elapses. Only data can be stored in the memory.

[0116]

According to the first aspect of the present invention, the communication status data generated based on the electric field strength and the out-of-service state is associated with the location data. Since the communication operation is controlled based on the location data and the communication status data stored in the storage unit, the communication operation is controlled based on the communication status data corresponding to the location data of the current point. If the strength is good and it is within range, even if it is not this GPS coverage area,
By judging that the reception environment with the base station is good, the communication operation with the base station can be performed while reducing the rate of occurrence of communication errors.

That is, the communication status data obtained in the past communication is stored in the storage means in association with the GPS location data, and whether or not communication is possible is determined based on the communication status data. Alternatively, since communication is performed only when there is a vehicle in the area, communication from an out-of-service state is eliminated, thereby reducing communication time and significantly reducing communication cost. .

According to the second aspect of the present invention, the communication status data relating to the communication status at the current point is stored in the storage means based on the line disconnection or the communication data error. Therefore, the communication operation with the base station can be executed while further reducing the communication error occurrence rate.

According to the third aspect of the present invention, since the communication status data is stored for each point or area based on the location data, the point or area based on the location data is stored. A communication operation at a communicable point or area can be controlled for each unit.

Further, according to the mobile communication terminal device of the present invention, even if it is a point or area stored as a non-communicable point or a non-communicable area, communication is performed again after a predetermined time has elapsed. It is possible to deal with the situation that the task can be performed.

Further, claim 6, 7 or 8 of the present invention.
According to the mobile communication terminal device described in the description, since the communication operation at the non-communicable point related to the communication status data stored in the storage unit is not started, that is, the reception environment with the base station is poor. By making the determination, it is possible to reliably prevent the occurrence of a communication error.

Further, claims 9, 10, and 1 in the present invention.
According to the mobile communication terminal device described in 1 or 12, since the non-communicable points related to the communication status data stored in the storage means are displayed on the map screen of the display means on the screen, the user can set the non-communicable points to the It can be recognized on the map screen whether or not there is, that is, a place where stable communication is performed can be easily recognized. As a result, communication quality can be improved, and unnecessary communication processing can be eliminated, so that communication time and communication cost can be significantly reduced.

Further, claims 13 and 14 of the present invention
According to the mobile communication terminal device described in 15, 16, or 17, the route guidance is provided on the map screen of the display means toward the communicable point based on the communication status data stored in the storage means. Can move the vehicle to the communicable point easily and in a short time by moving the vehicle by guiding route guidance to the communicable point on the map screen even if the user is at the communicable point. This can significantly improve communication efficiency,
There is no need to use wasted effort to search for a communicable point.

According to the communication method of the mobile communication terminal device of the present invention, the communication status data generated based on the electric field strength and the out-of-service state is stored in the storage means in association with the location data. In addition, since the communication operation is controlled based on the location data and the communication status data stored in the storage means,
Based on the communication status data corresponding to the location data of the current location, it is determined that the reception environment with the base station is good, for example, if the electric field strength is good and within the service area, even if it is not in this GPS receivable area. Thus, the communication operation with the base station can be performed while reducing the occurrence rate of the communication error.

That is, the communication status data obtained in the past communication is stored in the storage means in association with the GPS location data, and whether or not communication is possible is determined based on the communication status data. Alternatively, since communication is performed only when there is a vehicle in the area, communication from an out-of-service state is eliminated, thereby reducing communication time and significantly reducing communication cost. .

According to the communication method of the mobile communication terminal device according to the nineteenth aspect of the present invention, the communication status data relating to the communication status at the current point is stored in the storage means based on the line disconnection or the communication data error. As a result, the communication operation with the base station can be executed while reliably reducing the communication error occurrence rate.

Further, according to the communication method of the mobile communication terminal device of the present invention, the communication status data is stored for each point or area unit based on the location data. The communication operation at the communicable point or area can be controlled for each point or area unit.

Further, in the present invention, there is provided a method according to claim 21 or 22.
According to the communication method of the mobile communication terminal device described above, it is possible to cope with a situation in which communication can be performed again after a predetermined time has elapsed even at a point or area stored as a non-communicable point or a non-communicable area. Can be.

Further, according to the communication method of the mobile communication terminal device according to claim 23, 24 or 25 of the present invention,
Since the communication operation at the communication impossible point related to the communication status data stored in the storage unit is not started, that is, it is determined that the reception environment with the base station is bad, and the occurrence of the communication error is surely performed. Can be prevented.

In the present invention, claims 26 and 27,
According to the communication method of the mobile communication terminal device described in 28 or 29, the communication impossible point related to the communication status data stored in the storage means is displayed on the map screen of the display means on the screen, so that the user can communicate. It is possible to recognize on the map screen whether or not the user is at an impossible point, that is, it is possible to easily recognize a place where stable communication is performed. As a result, communication quality can be improved, and unnecessary communication processing can be eliminated, so that communication time and communication cost can be significantly reduced.

Therefore, claims 30 and 3 of the present invention
According to the communication method of the mobile communication terminal device described in 1, 32, 33 or 34, the route guidance is performed on the map screen of the display means toward the communicable point based on the communication status data stored in the storage means. Therefore, even if the user is in a communication impossible point, the user can move the vehicle to the communication possible point easily and in a short time by moving the vehicle by guiding route guidance to the communication possible point on the map screen. it can. As a result, communication efficiency can be greatly improved, and useless labor for searching for a communicable point is not used.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration inside a vehicle-mounted communication terminal device shown in an embodiment of a mobile communication terminal device and a communication method of the present invention.

FIG. 2 is a flowchart showing a processing operation of a CPU in a location data updating process of the on-vehicle communication terminal device shown in the present embodiment;

FIG. 3 is a flowchart showing a processing operation of a CPU in a communication process of the vehicle-mounted communication terminal device shown in the present embodiment;

FIG. 4 is a flowchart showing a processing operation of a CPU in communication processing of the vehicle-mounted communication terminal device according to the present embodiment;

FIG. 5 is a flowchart showing a processing operation of a CPU in communication processing of the vehicle-mounted communication terminal device shown in the present embodiment;

FIG. 6 is a block diagram showing a schematic configuration inside a conventional in-vehicle communication terminal device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 In-vehicle communication terminal device (mobile communication terminal device) 7 Memory (storage means) 9 Display part (display means) 10 Electric field strength detection part (field strength detection means) 11 Out-of-service state detection part (out-of-service state detection means) 12 lines Disconnection detection unit (line disconnection detection unit) 13 Communication error detection unit (data error detection unit) 14 CPU (communication status data generation unit, control unit)

Claims (34)

[Claims] An electric field intensity detecting means for detecting electric field intensity; an out-of-service state detecting means for detecting an out-of-service state; an electric field strength detected by the electric field strength detecting means and an out-of-service area detected by the out-of-service state detecting means. Communication status data generation means for generating communication status data relating to the communication status of the current location based on the state; and communication status data generated by the communication status data generation means associated with GPS location data in the storage means. A mobile communication terminal device comprising: storage means for controlling communication operation based on location data and communication status data stored in the storage means. 2. A communication system comprising: a line disconnection detecting unit for detecting a line disconnection; and a data error detecting unit for detecting a communication data error, wherein the communication status data generating unit includes a line detected by the line disconnection detecting unit. 2. The mobile communication terminal device according to claim 1, wherein communication status data relating to a communication status at a current location is generated based on a communication data error detected by disconnection or a data error detection unit. 3. The mobile device according to claim 1, wherein the communication status data of each point stored in the storage unit is communication status data for each point or area based on the GPS location data. Body communication terminal device. 4. The mobile communication terminal device according to claim 1, wherein said control means clears communication status data stored in said storage means after a lapse of a predetermined time. 5. The mobile communication terminal device according to claim 3, wherein said control means clears communication status data stored in said storage means after a lapse of a predetermined time. 6. The mobile communication terminal according to claim 1, wherein the control unit does not start a communication operation at a non-communicable point related to communication status data stored in the storage unit. apparatus. 7. The mobile communication terminal device according to claim 3, wherein the control unit does not start a communication operation at a communication impossible point related to communication status data stored in the storage unit. 8. The mobile communication terminal device according to claim 4, wherein the control unit does not start a communication operation at a non-communicable point related to communication status data stored in the storage unit. 9. The method according to claim 1, wherein the control unit displays on a map screen of a display unit a communication disabled point related to communication status data stored in the storage unit.
9. The mobile communication terminal device according to 2, 5, 7, or 8. 10. The mobile communication terminal according to claim 3, wherein said control means displays on a map screen of a display means a communication impossible point relating to communication status data stored in said storage means. apparatus. 11. The mobile communication terminal according to claim 4, wherein said control means displays on a map screen of a display means a communication disabled point relating to communication status data stored in said storage means. apparatus. 12. The mobile communication terminal according to claim 6, wherein said control means displays on a map screen of a display means a non-communicable point relating to communication status data stored in said storage means. apparatus. 13. The apparatus according to claim 1, wherein said control means guides a route on a map screen of a display means toward a communicable point based on communication status data stored in said storage means. 13. The mobile communication terminal device according to 5, 7, 8, 10, 11, or 12. 14. The mobile device according to claim 3, wherein said control means guides a route on a map screen of a display means toward a communicable point based on communication status data stored in said storage means. Body communication terminal device. 15. The movement according to claim 4, wherein the control means guides a route on a map screen of a display means toward a communicable point based on the communication status data stored in the storage means. Body communication terminal device. 16. The mobile device according to claim 6, wherein said control means guides a route on a map screen of a display means toward a communicable point based on communication status data stored in said storage means. Body communication terminal device. 17. The mobile device according to claim 9, wherein said control means guides a route on a map screen of a display means toward a communicable point based on the communication status data stored in said storage means. Body communication terminal device. 18. When detecting a communication status related to the electric field strength and the out-of-service state at the current location, communication status data related to the communication status at the current location is generated based on the electric field strength and the out-of-service state. A communication method for a mobile communication terminal device, characterized by storing in a storage means in association with location data, and controlling a communication operation based on the location data and communication status data stored in the storage means. 19. Upon detecting a communication status related to a line disconnection or a communication data error at the current point, communication status data relating to a line disconnection or a communication data error is generated, and the communication status data is associated with GPS location data. 19. The communication method for a mobile communication terminal device according to claim 18, wherein the communication method is stored in a storage unit. 20. The mobile device according to claim 18, wherein the communication status data of each location stored in the storage means is communication status data for each location or area based on the GPS location data. The communication method of the body communication terminal device. 21. The communication method for a mobile communication terminal device according to claim 18, wherein the communication status data stored in said storage means is cleared after a predetermined time has elapsed. 22. The communication method for a mobile communication terminal device according to claim 20, wherein the communication status data stored in said storage means is cleared after a predetermined time has elapsed. 23. The communication method for a mobile communication terminal device according to claim 18, wherein a communication operation at a non-communicable point related to communication status data stored in said storage means is not started. 24. The communication method for a mobile communication terminal device according to claim 20, wherein a communication operation at a non-communicable point related to communication status data stored in said storage means is not started. 25. The communication method for a mobile communication terminal device according to claim 21, wherein a communication operation at a non-communicable point related to communication status data stored in said storage means is not started. 26. The apparatus according to claim 18, wherein a non-communicable point relating to communication status data stored in said storage means is displayed on a map screen of a display means.
26. The communication method of the mobile communication terminal device according to 4 or 25. 27. The communication method for a mobile communication terminal device according to claim 20, wherein a non-communicable point relating to communication status data stored in said storage means is displayed on a map screen of a display means. 28. The communication method for a mobile communication terminal device according to claim 21, wherein a non-communicable point relating to communication status data stored in said storage means is displayed on a map screen of a display means. 29. The communication method for a mobile communication terminal device according to claim 23, wherein a non-communicable point related to communication status data stored in said storage means is displayed on a map screen of a display means. 30. A route guide on a map screen of a display means toward a communicable point based on communication status data stored in said storage means.
29. The communication method for a mobile communication terminal device according to 9, 22, 24, 25, 27, 28 or 29. 31. The mobile communication terminal device according to claim 20, wherein route guidance is provided on a map screen of a display means toward a communicable point based on communication status data stored in said storage means. Communication method. 32. The mobile communication terminal device according to claim 21, wherein route guidance is provided on a map screen of a display means toward a communicable point based on communication status data stored in said storage means. Communication method. 33. The mobile communication terminal device according to claim 23, wherein route guidance is provided on a map screen of a display means toward a communicable point based on the communication status data stored in said storage means. Communication method. 34. The mobile communication terminal device according to claim 26, wherein a route guidance is provided on a map screen of a display means toward a communicable point based on communication status data stored in said storage means. Communication method.