JP2008048051A - Communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a mobile terminal device or an on-vehicle device to acquire required data without uselessly occupying a communication band in a communication system. <P>SOLUTION: In the communication system 1, a navigation device 10 is configured so as to perform one-to-one communication to a portable telephone set 30. Then, short distance radio communication modules 18 and 36 provided in at least one of the portable telephone set 30 and the navigation device 10 transmit at least a part of data stored in their own storage part. Also, the short distance radio communication modules 18 and 36 provided in the other of the portable telephone set 30 and the navigation device 10 receive the transmitted data. Thus, since one device can acquire data by performing the one-to-one communication with the other device, the required data can be acquired from the outside without uselessly occupying the communication band in a wide area communication network. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication system including an in-vehicle device and a mobile terminal device.

  2. Description of the Related Art Conventionally, there is known a communication system in which a mobile terminal device having a wireless communication function communicates with a base station connected to a wide area network so that the mobile terminal device receives data from the base station. (For example, refer to Patent Document 1).

There is also known a communication system in which an in-vehicle device such as a car navigation device having a wireless communication function receives data from a base station (see, for example, Patent Document 2).
JP 2005-086579 A JP 2006-184772 A

  By the way, in recent years, for example, in-vehicle devices such as car navigation devices have been increased in capacity and functionality, and a large amount of data (for example, store information etc.) that can be provided to the mobile terminal device is stored in the storage means of the in-vehicle device. ) Is stored.

  For example, mobile terminal devices such as mobile phones and PDAs generally have an input interface (such as a keyboard) that is superior to in-vehicle devices, and data editing is easy. (For example, data on the title of music) can be provided from the mobile terminal device to the in-vehicle device.

  However, in the communication system described above, the mobile terminal device has the necessary data from the base station without acquiring the data from the other device even if the necessary data is already stored in the storage means of the other device such as the in-vehicle device. Therefore, a predetermined communication band (a radio wave band in the case of wireless communication) is required every time data communication is performed. Also, the in-vehicle device has the same problem because it receives necessary data from the base station.

  In the above system, since a wide area network is used for data communication, the user is burdened with communication costs for each data communication, which adversely affects the spread of the system. There is a possibility.

  Accordingly, in view of the above problems, a mobile terminal device possessed by a user and an in-vehicle device mounted on a vehicle and configured to be able to communicate one-to-one with the mobile terminal device are provided. It is an object of the present invention to enable a mobile terminal device or an in-vehicle device to acquire necessary data without wastefully occupying a communication band in a communication system.

  In the communication system according to claim 1 configured to achieve the above object, the in-vehicle device is configured to communicate with the mobile terminal device on a one-to-one basis. Then, the transmission means provided in at least one of the mobile terminal device and the in-vehicle device transmits at least a part of the data stored in its own storage means, and is provided in the other of the mobile terminal device and the in-vehicle device. The received receiving means receives the data transmitted by the transmitting means.

  According to such a communication system, at least one of the mobile terminal device and the in-vehicle device acquires data by performing one-to-one communication with the other of the mobile terminal device and the in-vehicle device. Therefore, the data required by the mobile terminal device or the in-vehicle device can be acquired from the outside without unnecessarily occupying the communication band in the wide area communication network.

Note that “one-to-one” communication in the present invention indicates that each device directly communicates without using a wide area network (such as the Internet network or a telephone line network).
Further, “proximity” as used in the present invention refers to a range within the line of sight within and around the vehicle and within a range where the mobile terminal device and the in-vehicle device can communicate one-on-one.

  Furthermore, as a mode for specifically realizing the transmission unit in the present invention, for example, a mode in which the transmission unit transmits data by short-range wireless communication such as infrared transmission or power-saving radio wave transmission can be cited. According to the communication system adopting such a mode for the transmission means, the area range for transmitting infrared rays and radio waves can be made as narrow as possible when the communication system performs data communication, so that the communication by other devices is adversely affected. Giving can be prevented.

  By the way, in the communication system according to claim 1, the in-vehicle device includes, as described in claim 2, a vehicle current location detection unit that detects the current location of the vehicle, and a detection of the vehicle current location detected by the vehicle current location detection unit. Accuracy determination means for determining whether or not the accuracy is better than a preset reference accuracy, and current location information requesting means for requesting current location information when the detection accuracy of the current location of the vehicle is poorer than the reference accuracy And current location information receiving means as receiving means for receiving current location information transmitted from the mobile terminal device after the request by the current location information requesting means.

  In this case, when the mobile terminal device receives the current location information request from the in-vehicle device and the terminal current location detection means for detecting the current location of the mobile terminal device, the in-vehicle information on the current location of the mobile terminal device detected by the terminal current location detection means. What is necessary is just to provide the present location information provision means as a transmission means which transmits with respect to an apparatus.

  According to such a communication system, when the current location measurement accuracy is poor in the in-vehicle device, it is possible to acquire the current location information detected by the mobile terminal device, so it is possible to improve the current location measurement accuracy in the in-vehicle device. .

  Note that if the terminal current location detection means in the mobile terminal device detects the current location by a method different from the vehicle current location detection means in the in-vehicle device, the in-vehicle device will detect the position of the vehicle using more methods. Therefore, the detection accuracy of the current location of the vehicle can be further improved.

  Furthermore, in the communication system according to claim 2, for example, the in-vehicle device may display the acquired current location, but the in-vehicle device may be displayed by the current location information receiving unit as described in claim 3. You may provide the correction | amendment means which correct | amends the present location of a vehicle based on the information on the present location of the received mobile terminal device, and the present location information of the vehicle detected by the vehicle present location detection means.

According to such a communication system, the current position of the vehicle can be detected with high accuracy by the correction means correcting the current position of the vehicle.
Further, in the communication system according to claim 1, the vehicle-mounted device includes a vehicle current position detection unit, a parking state determination unit that determines whether or not the vehicle is parked, and a parking unit, as described in claim 4. Position information transmitting means as the transmitting means for transmitting at least information on the current location of the vehicle detected by the vehicle current location detecting means to the mobile terminal device when the state determining means determines that the vehicle is parked; , May be provided.

In this case, the mobile terminal device only needs to include position information receiving means as receiving means for receiving the current location information of the vehicle transmitted from the in-vehicle device.
According to such a communication system, even if the user (driver) of the vehicle parks the vehicle and leaves the vehicle, the mobile terminal device receives the information on the current location of the vehicle. If the mobile terminal device operates and acts, the position of the vehicle can be easily grasped.

In particular, when a vehicle is parked in a parking lot where many vehicles can be parked, it is possible to prevent the parking location of the vehicle from being lost.
In the description of claim 4, the present invention can be made a dependent claim of claims 2 and 3 unless the description of claims 2 and 3 and the constituent elements (various means) are taken into consideration.

  Furthermore, in the communication system according to claim 4, the mobile terminal device, as described in claim 5, the terminal current location detection means, the current location information of the mobile terminal device detected by the terminal current location detection means, and Guiding means for guiding the user of the mobile terminal device to the current location of the vehicle based on the map information stored in the storage means may be provided.

  According to such a communication system, the user of the mobile terminal device can be guided to the position of the vehicle while associating the current location of the mobile terminal device with the current location of the vehicle. Therefore, the user of the mobile terminal device can be guided to the position of the vehicle without hesitation.

  In addition, in the communication system according to claim 4 or 5, the vehicle-mounted device receives the external command as described in claim 6, or the vehicle is put into a parking state by the parking state determination means. When it is determined that the vehicle current position has been detected, the vehicle information is stored in the storage means of the vehicle-mounted device, and includes peripheral information transmission means for transmitting information around the current position of the vehicle detected by the vehicle current position detection means. Also good.

  Since the in-vehicle device transmits not only the current location of the vehicle but also information around the vehicle to the mobile terminal device, even if the user of the mobile terminal device leaves the vehicle, It is possible to move in a state where necessary information (information around the vehicle) is held in the mobile terminal device.

  In the present invention, “periphery” refers to, for example, an area within a preset radius centered on the current position of the vehicle detected by the vehicle current position detection means, and “peripheral information” refers to the area within this area. Information about stores and facilities located in is shown.

  Further, in the communication system according to any one of claims 1 to 6, the in-vehicle device includes a traveling state detection unit that detects a traveling state of the vehicle and a traveling state detection unit as described in claim 7. The vehicle may include a traveling state transmitting unit as a transmitting unit that transmits information on the detected traveling state of the vehicle to the mobile terminal device.

  In this case, the mobile terminal device travels on the basis of the traveling state receiving unit as the receiving unit that receives the traveling state information of the vehicle transmitted from the in-vehicle device, and the information received by the traveling state receiving unit. A travel determination unit that determines whether or not the vehicle is traveling by the travel determination unit, and an operation restriction unit that restricts operation of at least some of the functions of the mobile terminal device when the travel determination unit determines that the vehicle is traveling As long as it has

  According to such a communication system, when the vehicle is in a traveling state, the operation of the function of the mobile terminal device can be restricted, so that a vehicle accident caused by the operation of the mobile terminal device while the vehicle is traveling is prevented. can do.

Embodiments according to the present invention will be described below with reference to the drawings.
[Outline of Communication System 1]
FIG. 1 is a block diagram showing a schematic configuration of a communication system 1 to which the present invention is applied.

  The communication system 1 includes a navigation device 10 mounted on a vehicle such as a passenger car and a mobile phone 30. Here, the navigation device 10 and the mobile phone 30 have a function of sharing data between the navigation device 10 and the mobile phone 30 as will be described later, in addition to the function as a known navigation device or a known mobile phone. I have it.

  In the process described later, the current location of the navigation device 10 and the current location of the mobile phone 30 are strictly different in position, but when the detection accuracy by the GPS receiver 13 deteriorates, the magnitude of the deviation of these positions is large. Is negligible with respect to the magnitude of the detection error by the GPS receiver 13. For this reason, in the present embodiment, the description will proceed assuming that the current location of the navigation device 10 and the current location of the mobile phone 30 are the same.

[Schematic configuration of communication system 1]
The navigation device 10 is mainly configured by a control unit 11 configured as a well-known microcomputer including a CPU, a ROM, a RAM, and the like. The control unit 11 includes a map data storage unit 12, a GPS (global). Positioning System) A receiver 13, a gyro sensor 14, an input unit 15, a speaker 16, a display unit 17, and a short-range wireless communication module 18 are connected.

  For example, the memory such as the ROM of the control unit 11 has a function list indicating a list of functions of the navigation device 10 (for example, functions as a music server and functions for using the mobile phone 30 hands-free). Stored. Further, a vehicle speed signal indicating the vehicle speed of the vehicle and a parking state signal indicating that the vehicle is in a parking state are input to the control unit 11 via an interface (not shown) (for example, an in-vehicle LAN communication device).

The map data storage unit 12 stores map data, store / facility information, and the like in association with latitude and longitude information.
The GPS receiver 13 detects the current location of the vehicle by receiving signals transmitted from a plurality of GPS satellites.

The gyro sensor 14 detects the inclination and acceleration of the vehicle and contributes to improving the accuracy of detecting the current location of the vehicle.
The input unit 15 is configured as, for example, a touch panel that detects that the user touches the surface of the display unit 17 or an operation button positioned around the display unit 17, and a signal corresponding to the operation of the user is transmitted to the control unit 11 is output.

The speaker 16 outputs a sound wave corresponding to the acoustic signal from the control unit 11 into the vehicle interior.
The display unit 17 is configured as an LCD (Liquid Crystal Display), for example, and displays an image corresponding to the video signal from the control unit 11.

  The short-range wireless communication module 18 is configured as, for example, an infrared communication module or a Bluetooth module, and the navigation device 10 is mounted with another short-range wireless communication module (this book) on which the navigation device 10 is located close to the device 10. In the embodiment, it functions as an interface for one-to-one communication with the mobile phone 30). Here, “one-to-one” communication means that each device communicates directly without using a wide area network (such as the Internet network or a telephone line network).

  In the short-range wireless communication module 18 in the navigation device 10, the communicable area is set inside and around the vehicle (for example, within a radius of about 10 m). For this reason, in this embodiment, the navigation device 10 exchanges (shares) data with the mobile phone 30 when the mobile phone 30 is located within this communicable area (that is, when it is close to the mobile phone 30). It is set to be possible.

  Next, the cellular phone 30 is configured around a processing unit 31 configured as a known microcomputer including a CPU, a ROM, a RAM, and the like. The processing unit 31 includes a GPS receiver 32, an application memory, and the like. The unit 33, the input unit 34, the base station communication unit 35, the short-range wireless communication module 36, the display unit 37, and the speaker 38 are connected.

  The GPS receiver 32, the short-range wireless communication module 36, the display unit 37, and the speaker 38 have the same configuration as each unit mounted on the navigation device 10, and these units 32 and 36 to 38 are connected to the processing unit 31. Various signals are exchanged between the two.

  The application storage unit 33 stores an application that can be executed by the processing unit 31. The memory such as the RAM of the processing unit 31 stores a function list indicating a list of various applications stored in the memory such as the ROM of the application storage unit 33 and the processing unit 31.

  The input unit 34 includes, for example, a plurality of buttons such as a plurality of number keys used when inputting a telephone number using the mobile phone 30 and a menu key used when switching functions. A signal corresponding to the button is output to the processing unit 31. When various processes to be described later are executed, the input unit 34 is operated to switch to a communication mode in which a signal input from the navigation device 10 via the short-range wireless communication module 36 can be received. It will be.

The base station communication unit 35 has a function for performing wireless communication with a base station connected to a mobile phone communication network.
Here, the to-base station communication unit 35 is configured to detect the radio field intensity of radio waves emitted from a plurality of base stations, and select and connect the ones whose radio field intensity is higher than a preset threshold level. The current location of the mobile phone 30 is detected according to the radio field intensity from a plurality of base stations. And the process part 31 detects the present location of the mobile telephone 30 accurately by combining the detection result by the GPS receiver 32, and the electromagnetic wave intensity from several base stations synthetically.

  In addition, the application storage unit 33 in the present embodiment stores navigation software in particular. When the processing unit 31 is set to the navigation mode by operating the input unit 34, the mobile phone 30 has Processing for displaying a map corresponding to the current location on the display unit 37 is executed. Further, when the destination is input via the input unit 34 or the short-range wireless communication module 36, a process of guiding the user of the mobile phone 30 to the destination is performed (guidance function: guidance means).

  Further, the control unit 11 of the navigation device 10 and the processing unit 31 of the mobile phone 30 execute various processes using a function for sharing data between the navigation device 10 and the mobile phone 30 as described later. These processes will be described below in order.

  The navigation device 10 corresponds to the in-vehicle device in the present invention, and the mobile phone 30 corresponds to the mobile terminal device in the present invention. Further, the GPS receiver 13 in the navigation device 10 corresponds to vehicle current location detection means, and the GPS receiver 32 in the mobile phone 30 corresponds to terminal current location detection means. Furthermore, the short-range wireless communication modules 18 and 36 correspond to a transmission unit, a reception unit, and a position information reception unit in the present invention.

[Present location correction processing (connection processing)]
First, processing for correcting the current location of the vehicle detected by the navigation device 10 using the information on the current location of the mobile phone 30 detected by the mobile phone 30 will be described with reference to FIGS. FIG. 2 is a flowchart showing the current position correction processing executed by the control unit 11 of the navigation apparatus 10, FIG. 3 is a flowchart showing connection processing executed by the control unit 11 of the navigation apparatus 10 and the processing unit 31 of the mobile phone 30, and FIG. 4 is a flowchart showing a current location information acquisition process executed by the control unit 11 of the navigation device 10 and the processing unit 31 of the mobile phone 30.

  The current position correction process shown in FIG. 2 is a process that is repeatedly executed when the navigation device 10 is activated, and the current position detection accuracy by the navigation device 10 (map matching by the GPS receiver 13 and the control unit 11) is high-rise building. This is a process to solve the problem of getting worse in urban areas.

First, in the processing of S110 to S130, it is determined whether or not the current position detection accuracy in the vehicle is good (accuracy determination means).
Specifically, it is determined whether or not the reception state of the detection signal by the GPS receiver 13 is good (S110). In this process, if the GPS receiver 13 captures signals from a predetermined number (for example, five) or more of GPS satellites, it is determined that the reception state is good, and GPS satellites less than this number are detected. If only the signal from is captured, it is determined that the reception status is bad.

  If the reception state of the detection signal by the GPS receiver 13 is good (S110: YES), the process of S110 is repeated assuming that the current location need not be corrected. If the reception status of the detection signal by the GPS receiver 13 is poor (S110: NO), the current location of the vehicle detected based on the detection signal of the GPS receiver 13 is stored in the map data storage unit 12. It is determined whether or not the map data corresponds to an urban area (that is, a place where detailed map data of a predetermined scale exists) (S120).

  If the current location of the vehicle does not correspond to the urban area of the map data (S120: NO), it is determined that there is no need to correct the current location, and the processing from S110 onward is repeated. If the current location of the vehicle corresponds to the urban area of the map data (S120: YES), it is assumed that the accuracy of the current location detected by the navigation device 10 is poor (S130), and the mobile phone 30 is changed from the mobile phone 30 in S140 to S160. The process of acquiring the current location information is implemented.

  Specifically, first, connection processing is performed (S140). In this connection process, a process as shown in FIG. 3 is performed. That is, the connection process corresponding to the connection process in the navigation device 10 is also performed in the mobile phone 30. The connection process in the mobile phone 30 is started when the mobile phone 30 is switched to a communication mode that can accept a signal input via the short-range wireless communication module 36.

  The connection process in the navigation device 10 first determines whether or not the mobile phone 30 has already been connected (S210). If already connected (S210: YES), an error flag indicating a state where the navigation device 10 and the mobile phone 30 cannot be connected (communication) is set to OFF (that is, a state indicating that communication is possible) (S300). End the connection process.

  In the connection process in the mobile phone 30, as in the connection process by the navigation device 10, first, it is determined whether or not the navigation device 10 has already been connected (S <b> 410). If already connected (S410: YES), the connection process is terminated.

  If it is not connected (S410: NO), it is determined whether there is a call from the navigation device 10 (S420). If there is no call (S420: NO), the process of S420 is repeated until there is a call.

  When the navigation device 10 is not connected to the mobile phone 30 (S210: NO), the predetermined mobile phone 30 stored in a memory such as a RAM of the control unit 11 is called (S220). And it waits for a predetermined time (for example, 2 seconds) until there is a response from the mobile phone 30 (S230: NO, S240: NO), and if there is a response from the mobile phone 30 within the predetermined time (S230: YES), S250 to S270. Execute authentication process at.

If there is no response from the mobile phone 30 within a predetermined time (S230: NO, S240: YES), the error flag is set to ON (S280), and the connection process is terminated.
If there is a call from the navigation device 10 (S420: YES), the mobile phone 30 transmits a response to this call to the navigation device 10 (S430). And authentication processing is implemented in S440-S470, S490.

  In the authentication process in the navigation device 10, first, authentication information is transmitted to the mobile phone 30 (S250). Here, as the authentication information, an authentication ID (for example, a unique identifier such as a manufacturing number of the navigation device 10) and an authentication key (password or password) are transmitted.

  Then, the mobile phone 30 waits for a predetermined time (for example, 2 seconds) until a response indicating that the authentication is successful (S260: NO, S270: NO), and if there is a response from the mobile phone 30 within the predetermined time (S260: YES), the navigation device 10 is set to a connection state in which data can be freely exchanged with the mobile phone 30 (S290), the error flag is set to OFF (S300), and the connection process is terminated.

  If there is no response indicating that the authentication is successful from the mobile phone 30 within a predetermined time (S260: NO, S270: YES), the error flag is set to ON (S280), and the connection process is terminated.

  On the other hand, in the authentication process in the mobile phone 30, a predetermined time (for example, 2 seconds) is waited until the authentication information is received from the navigation device 10 (S440: NO, S490: NO), and a response is received from the navigation device 10 within the predetermined time. If there is (S440: YES), it is confirmed that the received authentication information matches the authentication data stored in the memory such as the ROM of the mobile phone 30 in advance (S450), and if these match (S460: YES). ), The fact that the authentication is successful is transmitted to the navigation device 10 (S470).

And it sets to the connection permission state in which the navigation apparatus 10 and the mobile telephone 30 can exchange data freely (S480), and complete | finishes a connection process.
On the other hand, when the authentication information cannot be received from the navigation device 10 within the predetermined time (S440: NO, S490: YES), and when the received authentication information does not match the authentication data (S460: NO), The authentication navigation apparatus 10 is set to a connection rejection state in which data exchange with the mobile phone 30 is prohibited (S500), and the connection process is terminated.

  When the connection process is completed, the process returns to the current position correction process of FIG. 2, and it is determined whether or not the error flag is turned ON in the connection process (S150). If the error flag is in the ON state (S150: YES), it means that the connection with the mobile phone 30 has not been established, and the current position correction process is terminated as it is.

  If the error flag is OFF (S150: NO), since the connection with the mobile phone 30 is established, a current location information acquisition process for acquiring current location information from the mobile phone 30 is performed (S160). ). In this process, a process as shown in FIG. 4 is performed. In the mobile phone 30, when the connection with the navigation device 10 is established, the current location information providing process is performed in parallel with the connection process.

  In the current location information acquisition process in the navigation device 10, first, a function list exchange process is performed (S610). This process is a process of exchanging the function list stored in each memory such as a RAM.

  Subsequently, the navigation device 10 records the function list received from the mobile phone 30 in a memory such as a RAM (S620), and a current position function (current position display function) which is a function of a part of the above-described guidance function in the function list. (A function that detects your current location and displays your current location along with a map) and a current location search function (detects your current location and sends information about the current location (latitude and longitude information) to the outside or displays it in numbers It is determined whether or not a function to be performed is included (S630). If the current location function is not included (S630: NO), the current location information acquisition process is terminated.

  If the current location function is included (S630: YES), the mobile phone 30 is requested for various types of information including current location information (S640: current location information requesting means), and data corresponding to this request is received ( S650: Current location information receiving means), the current location information acquisition process is terminated.

  On the other hand, in the present location information providing process in the mobile phone 30, first, a function list exchange process is performed corresponding to the process of S610 (S710). Then, it waits for a predetermined time (for example, 2 seconds) until a request for various information including current location information is received from the navigation device 10 (S720: NO, S730: NO), and the mobile phone 30 requests various information within the predetermined time. If this is the case (S720: YES), various information including the current location information of the mobile phone 30 is transmitted to the navigation device 10 (S740: current location information providing means), and the current location information providing process is terminated.

If there is no request for various types of information from the navigation device 10 within a predetermined time (S720: NO, S730: YES), the current location information providing process is terminated.
When the present location information acquisition process (present location information providing process) as described above is completed, the process returns to the present location correction process in FIG. Is comprehensively determined, the current location of the vehicle is corrected (S170: correction means). Here, since the navigation apparatus 10 and the mobile phone 30 detect the current location using separate GPS receivers 13 and 32, in this process (S170), for example, more GPS satellites are captured. What is necessary is just to employ | adopt the signal from GPS receivers 13 and 32 which were made. In addition to the detection results by the GPS receivers 13 and 32, the navigation device 10 can also use information on the current location detected by the mobile phone 30 in accordance with the radio field intensity from the base station. Can be further improved.

[Information provision processing]
Next, a process in which the mobile phone 30 receives information from the navigation device 10 will be described with reference to FIG. FIG. 5 is a flowchart showing peripheral information providing processing executed by the control unit 11 of the navigation device 10.

  In this process, when the control unit 11 receives an information provision instruction via the input unit 15 or detects that the vehicle is parked, the control unit 11 carries information on the current location of the vehicle, information around the vehicle, and the like. This process is provided to the telephone 30.

  In the peripheral information providing process, first, it is determined whether or not an information providing command is input via the input unit 15 or the short-range wireless communication module 18 (S810). If an information provision command has been input (S810: YES), the process proceeds to S860.

On the other hand, if the information provision command is not input (S810: NO), it is determined whether or not the vehicle is parked in the process of S820 to S850 (parking state determination means).
That is, various processes for determining whether the vehicle speed is 0 (S820), whether the vehicle is in a parking state (S830), and whether the ignition SW is OFF (S840) are performed. If a negative determination is made in any of the processes, the process returns to S810 assuming that the vehicle is not in a parked state.

On the other hand, if an affirmative determination is made in all the processes of S820 to S840, it is determined that the vehicle is parked (S850), and the process proceeds to S860.
Subsequently, the same process as the above-described connection process is performed (S860), and it is determined whether or not the error flag is turned ON in the connection process (S870). If the error flag is in the ON state (S870: YES), it means that the connection with the mobile phone 30 has not been established, so the peripheral information providing process is terminated as it is.

  If the error flag is in the OFF state (S870: NO), the parking position where the vehicle is located is searched by searching the map data according to the detection result of the current location of the vehicle (latitude and longitude information) and the current location of the vehicle. If the parking lot name can be searched, the parking lot name information is transmitted to the mobile phone 30 via the short-range wireless communication module 18 (S880: position information transmitting means).

  When receiving the data, the processing unit 31 of the mobile phone 30 displays the received data on the map data, for example, when the data is overlaid on the map data or when the navigation mode is switched to the current location of the received vehicle. By setting it to the ground, the user is guided to the current location of the vehicle.

  Subsequently, information on shops and facilities in the vicinity of the current location of the vehicle (for example, within walking distance (within a radius of 2 km) around the current location of the vehicle) is transmitted to the mobile phone 30 (S890: ambient information transmission means), and this processing When is completed, the peripheral information providing process is terminated.

[Usage restriction processing]
Next, processing for restricting the operation of the function of the mobile phone 30 while the vehicle is running will be described with reference to FIG. FIG. 6 is a flowchart showing a use restriction process executed in cooperation by the control unit 11 of the navigation apparatus 10 and the processing unit 31 of the mobile phone 30. The use restriction process in the mobile phone 30 is a process that is repeatedly executed in parallel with the other processes when the mobile phone 30 is switched to the communication mode.

The use restriction process in the navigation device 10 first determines whether or not the vehicle running state has changed in the processes of S910 to S940.
That is, a vehicle speed signal and a parking state signal input from the outside are detected (S910: travel state detection means), and it is determined whether or not the vehicle speed has changed by comparing the vehicle speed signal acquired this time with the vehicle speed signal acquired last time. (S920).

If the vehicle speed has been changed (S920: YES), it is determined that the vehicle information representing the running state of the vehicle has been changed (S940).
On the other hand, if the vehicle speed has not changed (S920: NO), it is determined whether or not the parking state has changed by comparing the parking state signal acquired this time with the parking state signal acquired last time (S930). . If there is no change in the parking state (S930: NO), the processing from S910 onward is repeated assuming that the running state of the vehicle has not changed. If there is a change in the parking state (S930: YES), it is determined that the vehicle information indicating the traveling state of the vehicle has been changed (S940).

  Subsequently, the connection process described above is performed (S950). When this process is executed by the navigation device 10, if the mobile phone 30 is switched to the communication mode, the connection process is also performed on the mobile phone 30 (S1010).

  When the connection process is completed in the navigation device 10, it is determined whether or not the error flag is turned ON in the connection process (S960). If the error flag is in the ON state (S960: YES), it means that the connection with the mobile phone 30 has not been established, so the use restriction process is terminated as it is.

  If the error flag is in the OFF state (S960: NO), the vehicle information (vehicle speed signal and parking state signal here) that has changed is transmitted to the mobile phone 30 (S970: travel state transmitting means), and this processing is performed. When is finished, the use restriction process is terminated.

  Here, in the mobile phone 30, when the connection process is completed, the vehicle information transmitted from the navigation device 10 is acquired (S1020: traveling state receiving means). And it is determined by the process of S1030-S1050 whether the vehicle is drive | working (travel determination means).

  That is, first, based on the received vehicle information, it is determined whether or not the vehicle is in a parking state (S1030). If the vehicle is not in a parking state (S1030: YES), whether or not the vehicle speed is 0 is determined. Determination is made (S1040).

  When the vehicle is in the parking state (S1030: YES) and when the vehicle speed is not 0 (S1040: YES), the use restriction of the mobile phone 30 is released (S1070), assuming that the vehicle is stopped. The use restriction process in the telephone 30 is terminated. If the vehicle speed is not 0 (S1040: NO), the use of the mobile phone 30 is restricted (S1060: operation restricting means), assuming that the vehicle is traveling (S1050), and the use restriction in the mobile phone 30 is restricted. End the process.

Here, examples of the functions of the mobile phone 30 restricted in the use restriction process include a call function excluding a hands-free function, a video viewing function, and the like.
[Effects of this embodiment]
In the communication system 1 described in detail above, the navigation device 10 is configured to communicate with the mobile phone 30 on a one-to-one basis. The short-range wireless communication modules 18 and 36 provided in the mobile phone 30 and the navigation device 10 (including memories such as ROM and RAM) transmit at least a part of the data stored in their own storage units. In addition, the short-range wireless communication modules 18 and 36 included in the mobile phone 30 and the navigation device 10 receive data transmitted from other devices.

  According to such a communication system 1, since the mobile phone 30 and the navigation device 10 can acquire data from each other by performing one-to-one communication, the communication band in the wide area communication network is unnecessarily occupied. The necessary data can be acquired.

  In addition, the navigation device 10 includes a GPS receiver 13 that detects the current location of the vehicle, and the accuracy of detection of the current location of the vehicle detected by the GPS receiver 13 in the current location correction processing is better than a preset reference accuracy. It is determined whether or not. Then, when the detection accuracy of the current location of the vehicle is lower than the reference accuracy, the mobile phone 30 is requested for current location information.

  The mobile phone 30 includes a GPS receiver 32 and detects the current location of the mobile phone 30 according to the detection result of the GPS receiver 32 and the radio wave intensity received by the base station communication unit 35 of the mobile phone 30. When the mobile phone 30 receives a request for current location information from the navigation device 10, the mobile phone 30 transmits the detected current location information of the mobile phone 30 to the navigation device 10.

The navigation device 10 receives the current location information transmitted from the mobile phone 30 after requesting the current location information.
Therefore, according to such a communication system 1, when the current location measurement accuracy is poor in the navigation device 10, the current location information detected by the mobile phone 30 can be acquired. Can be improved.

  In particular, in the present embodiment, the GPS receiver 32 in the mobile phone 30 detects the current location by a method different from that of the GPS receiver 13 in the navigation device 10, so that the detection accuracy of the current location of the vehicle can be further improved.

  Further, the navigation device 10 corrects the current location of the vehicle based on the received current location information of the mobile phone 30 and the current location information of the vehicle detected by the GPS receiver 13 in the current location correction process.

  According to such a communication system 1, since the current location of the vehicle can be corrected based on the received position information of the mobile phone 30, the current location of the vehicle can be detected with high accuracy.

  Further, the navigation device 10 determines whether or not the vehicle is parked in the surrounding information providing process, and when it is determined that the vehicle is parked, at least the GPS receiver 13 with respect to the mobile phone 30. The information on the current location of the vehicle detected by is transmitted. In addition, the mobile phone 30 receives information on the current location of the vehicle transmitted from the navigation device 10 in the peripheral information providing process.

  Therefore, according to such a communication system 1, even if the user (driver) of the vehicle parks the vehicle and leaves the vehicle, the mobile phone 30 receives the current location information of the vehicle. If the user carries the mobile phone 30 and acts, the position of the vehicle can be easily grasped.

In particular, when a vehicle is parked in a parking lot where many vehicles can be parked, it is possible to prevent the parking location of the vehicle from being lost.
Further, the mobile phone 30 has a navigation function for guiding the user of the mobile phone 30 to the current location of the vehicle based on the detected current location information of the mobile phone 30 and map information stored in the storage unit in advance. ing.

  Therefore, according to such a communication system 1, the user of the mobile phone 30 can be guided to the position of the vehicle while associating the current location of the mobile phone 30 with the current location of the vehicle. Therefore, the user of the mobile phone 30 can be guided to the position of the vehicle without hesitation.

  In addition, when the navigation apparatus 10 receives an external command or when it is determined that the vehicle is parked, the GPS receiver 13 among the various information stored in the storage unit of the navigation apparatus 10 Information around the current location of the detected vehicle is transmitted.

  According to such a communication system 1, the navigation device 10 transmits not only the current location of the vehicle but also information around the vehicle to the mobile phone 30, so that the user of the mobile phone 30 is away from the vehicle. Even in the information stored in the vehicle, necessary information (information around the vehicle) can be moved while being held in the mobile phone 30.

  In addition, the navigation device 10 detects the traveling state of the vehicle in the use restriction process, and transmits information on the traveling state of the vehicle to the mobile phone 30. Then, the cellular phone 30 receives the information on the traveling state of the vehicle transmitted from the navigation device 10, and determines whether or not the vehicle is traveling based on the received information. If it is determined that the vehicle is traveling, the operation of at least some of the functions of the cellular phone 30 is restricted.

  According to such a communication system 1, when the vehicle is in a running state, the operation of the function of the mobile phone 30 can be restricted, so that a vehicle accident caused by operating the mobile phone 30 while the vehicle is running can be avoided. Can be prevented.

[Other Embodiments]
Embodiments of the present invention are not limited to the above-described embodiments, and can take various forms as long as they belong to the technical scope of the present invention.

  For example, in the communication system 1 of the present embodiment, in the current position correction process, the process of S170 may be omitted and only the information on the current position detected by the mobile phone 30 may be acquired.

  In this case, the control unit 11 of the navigation device 10 displays the current location detected by the navigation device 10 and the assumed error range as the navigation detection current location mark 51 as shown in FIG. It is only necessary to display it on the screen. At this time, the control unit 11 may display the current location acquired from the mobile phone 30 and the assumed error range on the display unit 17 as the mobile detection current location mark 52 so as to overlap the navigation detection current location mark 51.

  In this case, the size of each of the marks 51 and 52 (here, the size of a circle) indicates the size of the error range. The larger the marks 51 and 52, the larger the error range and the poorer the current position detection accuracy. It shows that. This error range is calculated by applying various conditions such as the number of base stations from which the mobile phone 30 has detected radio waves and their arrangement, the number of captured GPS satellites and their arrangement, etc., to preset mathematical formulas.

  Further, as shown in FIG. 7B, the marks 51 and 52 may be displayed as separate images. Here, in the process of S740 of the current location information providing process (FIG. 4), in addition to the current location information, information around the current location (store and facility information) is acquired from the mobile phone 30. May display the acquired information around the current location on the image on which the mobile detection current location mark 52 is displayed. In this way, the information that the navigation device 10 and the mobile phone 30 have can be complemented and displayed.

  In addition, when the mobile phone 30 has a function of receiving and displaying a television broadcast, an image to be displayed on the mobile phone 30 may be set to be displayed on the display unit 17 of the navigation device 10.

  In this case, when the navigation apparatus 10 is set to the TV viewing mode from the mobile phone 30, the current location information acquisition process described above is started, and the mobile phone 30 receives a TV broadcast reception function in S630 of the current location information acquisition process. Mobile phone 30 may transfer the television image to navigation device 10 in the process of S740.

  Note that the image displayed on the mobile phone 30 is not limited to the television image, and may be transferred to the navigation device 10.

It is a block diagram which shows schematic structure of a communication system. A flowchart showing the current position correction process; Flow chart showing connection process It is a flowchart which shows a present location information acquisition process and a present location information provision process. It is a flowchart which shows a periphery information provision process. It is a flowchart which shows a use restriction process. It is explanatory drawing which shows the example of a display of the present location of the vehicle in a navigation apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Communication system, 10 ... Navigation apparatus, 11 ... Control part, 12 ... Map data storage part, 13 ... GPS receiver, 14 ... Gyro sensor, 15 ... Input part, 16 ... Speaker, 17 ... Display part, 18 ... Near Distance wireless communication module, 30 ... mobile phone, 31 ... processing unit, 32 ... GPS receiver, 33 ... application storage unit, 34 ... input unit, 35 ... base station communication unit, 36 ... short-range wireless communication module, 37 ... Display unit, 38 .. speaker.

Claims (7)

A mobile terminal device possessed by the user;
An in-vehicle device configured to be capable of one-to-one communication with the mobile terminal device mounted on a vehicle and disposed in proximity to the vehicle;
With
When at least one of the mobile terminal device and the in-vehicle device receives an external request, at least a part of the data stored in its storage means is transferred to the other device of the mobile terminal device and the in-vehicle device. A transmission means for transmitting to
A communication system, wherein at least the other of the mobile terminal device and the in-vehicle device includes receiving means for receiving data transmitted by the transmitting means. The in-vehicle device is
Vehicle current location detection means for detecting the current location of the vehicle on which the in-vehicle device is mounted;
Accuracy determination means for determining whether or not the detection accuracy of the current location of the vehicle is better than a preset reference accuracy based on a detection condition when the current location of the vehicle is detected by the vehicle current location detection means;
Current location information requesting means for requesting current location information to the mobile terminal device when the accuracy determination means determines that the detection accuracy of the current location of the vehicle is worse than the reference accuracy;
Current location information receiving means as the receiving means for receiving the current location information transmitted from the mobile terminal device after the request by the current location information requesting means;
With
The mobile terminal device
Terminal current location detection means for detecting the current location of the mobile terminal device;
Upon receiving a request for current location information from the in-vehicle device, current location information providing means as the transmission means for transmitting the current location information of the mobile terminal device detected by the terminal current location detection means to the in-vehicle device;
The communication system according to claim 1, further comprising: The in-vehicle device is
And a correction means for correcting the current location of the vehicle based on the current location information of the mobile terminal device received by the current location information receiving means and the current location information of the vehicle detected by the vehicle current location detection means. The communication system according to claim 2. The in-vehicle device is
Vehicle current location detection means for detecting the current location of the vehicle on which the in-vehicle device is mounted;
Parking state determination means for determining whether or not the vehicle is in a parking state;
When the parking state determining unit determines that the vehicle is parked, the transmitting unit transmits at least information on the current location of the vehicle detected by the vehicle current location detecting unit to the mobile terminal device. Position information transmission means;
With
The mobile terminal device
Position information receiving means as the receiving means for receiving information on the current location of the vehicle transmitted from the in-vehicle device;
The communication system according to claim 1, further comprising: The mobile terminal device
Terminal current location detection means for detecting the current location of the mobile terminal device;
Guidance means for guiding the user of the mobile terminal device to the current location of the vehicle based on the current location information of the mobile terminal device detected by the terminal current location detection means and the map information stored in the storage means in advance;
The communication system according to claim 4, further comprising: The in-vehicle device is
Detected by the vehicle current location detection means among various information stored in the storage means of the in-vehicle device when receiving an external command or when the parking state determination means determines that the vehicle is parked The communication system according to claim 4 or 5, further comprising peripheral information transmitting means for transmitting information around the current location of the vehicle that has been used. The in-vehicle device is
Traveling state detecting means for detecting the traveling state of the vehicle;
Traveling state transmitting means as the transmitting means for transmitting information on the traveling state of the vehicle detected by the traveling state detecting means to the mobile terminal device;
With
The mobile terminal device
A traveling state receiving means as the receiving means for receiving information on the traveling state of the vehicle transmitted from the in-vehicle device;
Travel determination means for determining whether or not the vehicle is traveling based on the information received by the travel state reception means;
When it is determined by the travel determination means that the vehicle is traveling, an operation restriction means for restricting the operation of at least a part of the functions of the mobile terminal device;
The communication system according to any one of claims 1 to 6, further comprising:

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