JP2005181212A - Navigation system, communication method for navigation system at parking time, mobile terminal for navigation system, and on-vehicle device for navigation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation system capable of preventing unnecessary electric power from being consumed, by interrupting communication with an on-vehicle device when a mobile terminal is separated from a vehicle by a prescribed distance, and by interrupting screen display when separated further by a prescribed distance. <P>SOLUTION: In this navigation system, the on-vehicle device transmits positional information of the vehicle and map information in a periphery of the vehicle to the mobile terminal when the vehicle is brought into a parking condition, the receiving mobile terminal displays on a screen a vehicle position on the basis of the positional information and the map information, and positions a position of the terminal itself to be displayed on the screen, the mobile terminal interrupts the communication with the on-vehicle device when the terminal is judged to go out of the first communication area of the on-vehicle device, and the screen display is stopped when judged to go out of the second communication area of the on-vehicle device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a navigation system having a function of transmitting and displaying a parking position from an in-vehicle device mounted on a vehicle to a portable terminal when the vehicle is in a parking state.

  Conventionally, navigation information stored in a navigation system has been used not only while moving by a vehicle but also after arriving at a destination.

Here, as a conventional example in which the navigation information described above is carried and used, for example, in Japanese Patent Laid-Open No. 2000-322419 (Patent Document 1), navigation information is transferred from a navigation device mounted on a vehicle to a card type portable terminal device. A technology for downloading and carrying the information and displaying the downloaded information on a card-type portable terminal device as required is disclosed.
JP 2000-322419 A

  However, the conventional example disclosed in Patent Document 1 described above only downloads and uses navigation information from an in-vehicle navigation device to a card type mobile terminal device, and the card type mobile terminal device does not communicate with the navigation device. Absent. Therefore, the parking position of the vehicle and the current position of the card type mobile terminal device cannot be provided to the user.

  For this reason, the vehicle cannot be used in the case where the vehicle is parked in a large parking lot or a complex parking lot and it is not known where the vehicle is parked.

  In the case of a portable terminal having a communication function with an in-vehicle device mounted on a vehicle, the current position of the portable terminal and the parking position of the vehicle can be provided to the user. When transferring map information to a mobile device, the mobile terminal must constantly search for the in-vehicle device that is the connection destination, which increases power consumption more than necessary, leading to faster battery consumption. It was.

  However, in order to solve this problem, if the communication function is completely stopped so as not to waste power and the communication function is turned on by the button input operation, various settings of the communication function are newly required. Therefore, it takes time to connect to the in-vehicle device, and another problem that the portable terminal cannot be used at a necessary timing has occurred.

  This invention is made in order to solve such a conventional subject, and the objective is to communicate with an in-vehicle device and provide a user with a parking position of a vehicle and a position of a portable terminal. An object of the present invention is to provide a navigation system that can prevent unnecessary power consumption.

  In order to achieve the above object, in the navigation system of the present invention, when the vehicle is parked, the in-vehicle device transmits the position information of the vehicle and the surrounding map information where the vehicle is parked to the portable terminal, and the received portable The terminal displays the vehicle position on the screen based on the position information and the map information, measures the position of the terminal itself, displays the position on the screen, and determines that the mobile terminal is out of the first communication area of the in-vehicle device. The screen display is stopped when it is determined that the communication is stopped and the vehicle is out of the second communication area of the vehicle-mounted device.

  In the navigation device according to the present invention, the in-vehicle device and the mobile terminal communicate with each other, so that the position of the vehicle and the position of the mobile terminal can be provided to the user. Furthermore, when the mobile terminal comes out of the predetermined area of the in-vehicle device, communication is stopped and screen display is stopped, so that unnecessary battery consumption in the mobile terminal can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of an in-vehicle device in a navigation system according to the present invention. As shown in the figure, the in-vehicle device 1 includes a narrow area communication (DSRC) between a processing unit 2 that executes processing of various data, a program memory 3 that stores various programs related to display and operation, and a mobile terminal. ), A radio unit 5 that performs modulation / demodulation of the narrow region communication, a GPS antenna 6 that receives data related to the position of the vehicle, an input unit 7 that sets various navigation operations, and processing An in-vehicle display 8 for presenting the result to the driver, and an in-vehicle speaker 9 for notifying the driver of the processing result and guidance by voice.

  Here, the processing unit 2 includes a narrow-area communication data processing unit 10 that processes narrow-area communication data, and a navigation data processing unit 11 that processes information related to navigation.

  The in-vehicle device 1 is connected to the door lock control mechanism 12 of the vehicle, and when receiving a door lock signal from the portable terminal, the vehicle-mounted device 1 transmits a signal to the door lock control mechanism 12 to lock the door of the vehicle. Further, the in-vehicle device 1 receives the wheel speed pulse signal from the vehicle and monitors the vehicle speed, and receives the parking brake signal to determine whether or not the vehicle is in the parking state.

  Next, the configuration of an embodiment of a portable terminal in the navigation system according to the present invention will be described based on the block diagram of FIG. As shown in the figure, the portable terminal includes a control unit 21 that processes and controls narrow communication data and information related to navigation, an operation unit 22 that inputs various operations by the driver, a map around the vehicle, Narrow-range communication (DSRC) between the display unit 23 that displays the processing result such as the parking position of the vehicle, the position determination unit 25 that determines the position of the mobile terminal based on the data acquired from the GPS antenna 24, and the in-vehicle device ) And a narrow area communication control unit 27 that performs control such as modulation / demodulation of the narrow area communication.

  Next, a communication method during parking by the navigation system according to the present embodiment will be described based on a flowchart. FIG. 3 is a flowchart showing processing in the in-vehicle device of the navigation system according to the present embodiment.

  The in-vehicle device determines whether the vehicle is traveling or parked using information such as a wheel speed pulse and a parking brake signal (S301), and the process does not proceed when the vehicle is traveling.

  When the vehicle is parked, the in-vehicle device acquires the position information of the position where the vehicle is parked and the map information within a predetermined range from the parked position, and transmits them to the mobile terminal (S302).

  At this time, the area of the map information to be transmitted may be map information within a predetermined distance set in advance, for example, a radius of 10 m, or the size of the entire parking lot can be determined by judging the size of the parking lot by the navigation function. It may be map information.

  In this way, when the vehicle is parked, the in-vehicle device transmits vehicle position information and map information around the vehicle to the mobile terminal.

  Next, processing in the portable terminal of the navigation system according to the present embodiment will be described based on the flowchart of FIG.

  The portable terminal monitors whether or not the position information of the position where the vehicle is parked and the map information around the vehicle have been transmitted from the in-vehicle device (S401). When the position information and the map information are received from the in-vehicle device, the position of the vehicle is displayed on the display unit 23 based on the received position information and the map information, and the position of the portable terminal itself is used using the GPS antenna 24. The position is measured and superimposed on the map and displayed (S402).

  Next, the position determination unit 25 of the mobile terminal calculates the distance between the vehicle and the mobile terminal, monitors whether the distance is equal to or greater than the predetermined distance B, and the mobile terminal is shown in FIG. It is monitored whether it is within one communication area (S403). Here, the predetermined distance B may be arbitrarily set, but may be set as an effective distance for using the remote control from the portable terminal to the vehicle, for example, 5 to 10 m. The distance is calculated based on GPS information, but the calculation method is performed using a general method.

  And when it is not away from the predetermined distance B, it returns to step S402 and continues the display. When it is determined that it is away from the predetermined distance B, the portable terminal transmits a door lock signal for locking the vehicle door to the in-vehicle device, The position determination unit 25 of the mobile terminal transmits a stop signal to the narrow area communication control unit 27, and upon receiving this stop signal, the narrow area communication control unit 27 always stops the narrow area communication terminal scan, and The search function is stopped (S404).

  At this time, when the narrow area communication terminal scan by the mobile terminal is stopped, the in-vehicle device determines that the mobile terminal has exited the first communication area and enters a standby state, thereby preventing unnecessary power consumption.

  Next, the position determination unit 25 of the mobile terminal monitors whether the mobile terminal is separated from the vehicle by a predetermined distance A or more and monitors whether the mobile terminal is in the second communication area shown in FIG. If it is determined that the predetermined distance A has been exceeded (S405), the map display around the vehicle displayed on the display unit 23 of the portable terminal is stopped and a normal display screen is displayed (S406). At this time, the map information and the vehicle position information are stored in the memory of the control unit 21 without being discarded.

  If the size of the parking lot is known by the navigation function, the second communication area is set to the parking lot range instead of the predetermined distance A, and the map information is displayed when it is determined that the mobile terminal has left the parking lot. You may make it stop.

  As described above, in the navigation system according to the present embodiment, the mobile terminal receives the position information of the vehicle and the map information around the vehicle from the in-vehicle device and displays them together with the position of the terminal itself. Can be provided to the user. Further, the search function is stopped when the mobile terminal is away from the vehicle by a predetermined distance, and the display of the map information is stopped when the mobile terminal is further away from the vehicle by a predetermined distance, so that unnecessary battery consumption in the mobile terminal can be prevented.

  Moreover, since the mobile device determines that the mobile terminal has exited from the first communication area when the narrow-area communication terminal scan by the mobile terminal is stopped, it enters a standby state, so that unnecessary power consumption can be prevented. it can.

  Next, processing when the portable terminal of the navigation system according to the present embodiment returns to the vehicle and redisplays information will be described based on the flowchart of FIG.

  The portable terminal always measures the position of the terminal itself to monitor whether the distance from the vehicle is equal to or less than the predetermined distance A, and monitors whether the portable terminal has entered the second communication area shown in FIG. (S601). At this time, if the size of the parking lot is known by the navigation function, the second communication area is set to the parking lot range instead of the predetermined distance A, and it is monitored whether the portable terminal has entered the parking lot. It may be.

When the distance from the vehicle is equal to or less than the predetermined distance A, the mobile terminal displays the map information around the vehicle and the vehicle position information stored in the memory of the control unit 21 on the display unit 23, and the terminal The own position is measured, and the position is superimposed and displayed again on the display unit 23 (S602).

  Next, the mobile terminal monitors whether or not the distance from the vehicle does not become the predetermined distance B or less, and monitors whether or not the mobile terminal has entered the first communication area shown in FIG. 5B (S603). And if it becomes below predetermined distance B, a portable terminal will start the narrow area | region communication terminal scan for communicating with a vehicle-mounted apparatus (S604).

  At this time, when the narrow area communication terminal scan by the mobile terminal is resumed, the in-vehicle device determines that the mobile terminal has entered the first communication area and cancels the standby state. Thus, the in-vehicle device prevents unnecessary power consumption until the driver returns to the vehicle.

  Next, the portable terminal monitors whether or not a remote control operation such as door unlocking is performed (S605), and when the driver inputs an operation to transmit a door lock release signal after the remote control operation is performed, Ends the display of the map information around the vehicle (S606).

  As described above, in the navigation system according to the present embodiment, the map information is displayed again when the mobile terminal approaches a predetermined distance from the vehicle, and the search function is resumed when the mobile terminal approaches the predetermined distance. It is possible to prevent unnecessary battery consumption in the portable terminal until it returns to the periphery.

  Further, when the narrow-area communication terminal scan by the mobile terminal is resumed, the in-vehicle device determines that the mobile terminal has entered the first communication area and cancels the standby state, so that the driver returns It is possible to prevent unnecessary power consumption until it comes.

  The navigation system of the present invention has been described based on the illustrated embodiment. However, the present invention is not limited to this, and the configuration of each unit is replaced with an arbitrary configuration having the same function. Can do.

  A navigation system having a function of transmitting and displaying a parking position from an in-vehicle device mounted on a vehicle to a portable terminal when the vehicle is in a parking state, and is extremely useful as a technique for preventing unnecessary power consumption. It is.

It is a block diagram which shows the structure of the vehicle-mounted apparatus of the navigation system which concerns on embodiment of this invention. It is a block diagram which shows the structure of the portable terminal of the navigation system which concerns on embodiment of this invention. It is a flowchart for demonstrating the process of the vehicle-mounted apparatus in the communication method at the time of parking of the navigation system which concerns on this invention. It is a flowchart for demonstrating the process of the portable terminal in the communication method at the time of parking of the navigation system which concerns on this invention. It is a figure for demonstrating the change of the communication area by the movement of a portable terminal. It is a flowchart for demonstrating the process when the driver | operator returns to a vehicle in the communication method at the time of parking of the navigation system which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-vehicle apparatus 2 Processing part 3 Program memory 4, 26 Narrow communication antenna 5 Wireless part 6, 24 GPS antenna 7 Input part 8 In-vehicle display 9 In-car speaker 10 Narrow communication data processing part 11 Navigation data processing part 12 Door lock control Mechanism 21 Control unit 22 Operation unit 23 Display unit 25 Position determination unit 27 Narrow band communication control unit

Claims (9)

A navigation system including an in-vehicle device mounted on a vehicle and a portable terminal that communicates with the in-vehicle device and provides information to a driver,
When the vehicle is parked, an in-vehicle device that transmits the position information of the vehicle and map information around the vehicle parked to the mobile terminal;
Based on the position information received from the in-vehicle device and the map information, the parking position of the vehicle is displayed on the screen, the position of the terminal itself is measured and displayed on the screen, and the vehicle exits from the first communication area of the in-vehicle device. A navigation system comprising: a portable terminal that stops communication with the in-vehicle device when determined, and stops screen display when determined to have exited from the second communication area of the in-vehicle device.   When the mobile terminal determines that it has entered the second communication area, it resumes the screen display of the position information and the map information, and when it determines that it has entered the first communication area, it communicates with the in-vehicle device. The navigation system according to claim 1, wherein the navigation system is resumed.   3. The navigation system according to claim 1, wherein when the mobile terminal stops communication, the in-vehicle device determines that the mobile terminal has left the first communication area. 4.   4. The navigation system according to claim 1, wherein the in-vehicle device determines that the mobile terminal has entered the first communication area when the mobile terminal resumes communication. 5. . A communication method during parking of a navigation system including an in-vehicle device mounted on a vehicle and a portable terminal that communicates with the in-vehicle device and provides information to a driver,
When the vehicle is in a parking state, the in-vehicle device transmits position information of the vehicle and map information around the vehicle parked to the mobile terminal,
The portable terminal displays the parking position of the vehicle on the screen based on the position information and the map information received from the in-vehicle device and measures the position of the terminal itself to display the screen.
The mobile terminal stops communication with the in-vehicle device when determining that the mobile terminal has exited the first communication area of the in-vehicle device,
A communication method during parking of the navigation system, wherein the screen display is stopped when it is determined that the vehicle is out of the second communication area of the in-vehicle device. A mobile terminal of a navigation system including an in-vehicle device mounted on a vehicle and a mobile terminal that communicates with the in-vehicle device and provides information to a driver,
When the vehicle is parked, the vehicle position information and surrounding map information where the vehicle is parked are received from the in-vehicle device,
Based on the received position information and the map information, the parking position of the vehicle is displayed on the screen and the position of the terminal itself is measured and displayed on the screen.
When it is determined that the first communication area of the in-vehicle device has come out, the communication with the in-vehicle device is stopped,
The portable terminal of the navigation system, wherein the screen display is stopped when it is determined that the vehicle is out of the second communication area of the in-vehicle device.   When it is determined that the second communication area has been entered, the screen display of the position information and the map information is resumed. When it is determined that the first communication area has been entered, communication with the in-vehicle device is resumed. The mobile terminal of the navigation system according to claim 6, wherein the mobile terminal is a mobile terminal. An in-vehicle device of a navigation system including an in-vehicle device mounted on a vehicle and a portable terminal that communicates with the in-vehicle device and provides information to a driver,
When the vehicle is parked, the vehicle location information and map information around the vehicle is sent to the mobile terminal,
When the portable terminal stops communication, it is determined that the portable terminal is out of the first communication area. The in-vehicle device for a navigation system according to claim 8, wherein when the mobile terminal resumes communication, the mobile terminal determines that the mobile terminal has entered the first communication area.

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