JP6714946B2 - Keyless entry system and control method thereof - Google Patents

Description

The present invention relates to a keyless entry system and its control method.

In the field of automobile-related technology, a keyless entry system including a vehicle-mounted device mounted on a vehicle and a portable device carried by a vehicle user has been put into practical use. In this type of keyless entry system, the door of the vehicle can be locked/unlocked by wirelessly transmitting an instruction from a portable device owned by a vehicle user to a vehicle-mounted device.

Generally, it is desirable that the communication characteristics of the keyless entry system be uniform at all angles of the vehicle. However, in an actual keyless entry system, since the communication characteristics have directivity, it is common that the communication characteristics deteriorate (the communication distance becomes shorter) at a specific angle.

The antenna device built in the vehicle is surrounded by the body of the vehicle (that is, a metal material), and the radio waves transmitted from the portable device are also reflected inside the vehicle, so that complicated multipath fading occurs. This is one of the factors that have directivity. Therefore, even if the user operates the portable device from a specific angle of the vehicle, the door of the vehicle may not be locked or unlocked as desired by the user, which impairs the convenience of the user. ..

Techniques for improving the directivity of the antenna device incorporated in this vehicle have been proposed in Patent Documents 1 and 2, for example.
In Patent Documents 1 and 2, an antenna current flowing in a UHF antenna built in an in-vehicle device is controlled using a variable capacitance element or a capacitance element connected to the UHF antenna, and each operation of a portable device by a vehicle user is performed. Describes that the radiation characteristics of the UHF antenna are dynamically changed to substantially eliminate the directivity of the UHF antenna.

Japanese Patent No. 5826056 Japanese Patent No. 5600414

As described above, in the keyless entry system of the background art, since the antenna device mounted on the vehicle normally has directivity, there arises a problem that the communication characteristic is deteriorated (the communication distance is shortened) at a specific angle of the vehicle. To do. Further, since the mounting position of the antenna device is different for each vehicle type, it is difficult to eliminate the directivity in all vehicle types even if the characteristics of the antenna device alone are improved by using the techniques described in Patent Documents 1 and 2. ..

The present invention has been made to solve the problems of the background art described above, and an object of the present invention is to provide a keyless entry system and a control method thereof that enable stable communication at all angles of a vehicle. ..

In order to achieve the above object, a keyless entry system of the present invention is a vehicle-mounted device mounted on a vehicle, which operates according to a portable device owned by a user and an instruction transmitted from the portable device in a first frequency band. A keyless entry system comprising
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are saved, and when a predetermined operation is performed, the position information of the portable device is acquired, and the position information of the portable device, Based on the communication characteristic data and the position information of the vehicle, it is determined whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate, and the communication is performed. When in the area where the characteristics of No. 1 deteriorate, the transmission power is set to be higher than that outside the area where the characteristics of communication deteriorate, and the operation signal indicating the instruction from the user is transmitted.

Alternatively, a portable device owned by the user, a portable terminal possessed by the user and capable of acquiring position information of its own device, and the portable device operates according to an instruction transmitted from the portable device in the first frequency band, A keyless entry system including a vehicle-mounted device mounted on a vehicle,
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are stored, and when a predetermined operation is performed, the mobile terminal is requested to acquire the position information via the short-range communication means. Along with transmitting the position information of the vehicle and the communication characteristic data to the mobile terminal,
The mobile terminal is
Whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate based on the position information of the own device, the communication characteristic data, and the position information of the vehicle. Determines whether or not, and transmits the determination result to the portable device via the short-range communication means,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in the area in which the characteristics of the communication deteriorate, the transmission power is set to be higher than that in the area in which the characteristics of the communication deteriorate. This is a configuration in which an operation signal indicating an instruction from the user is enlarged and transmitted.

Alternatively, a portable device owned by the user, a portable terminal possessed by the user and capable of acquiring position information of its own device, and the portable device operates according to an instruction transmitted from the portable device in the first frequency band, A keyless entry system including a vehicle-mounted device mounted on a vehicle,
The vehicle-mounted device is
When the vehicle is in the parked state, the positional information of the vehicle is acquired, and the positional information of the vehicle and communication characteristic data of the portable device and the vehicle-mounted device in the first frequency band, which are provided in advance, are stored in a near field. Transmitting to the mobile terminal via distance communication means,
The mobile terminal is
When the vehicle position information and the communication characteristic data are received from the vehicle-mounted device, the vehicle position information and the communication characteristic data are saved,
The portable device is
When a predetermined operation is performed, it is determined whether or not the portable device is within a region in which the characteristics of the communication with the vehicle-mounted device using the first frequency band deteriorate. Request to the mobile terminal via
The mobile terminal is
Upon receiving the determination request from the portable device, the position information of the own device is acquired, and based on the position information of the own device and the stored communication characteristic data and the position information of the vehicle, the portable device, It is determined whether or not the characteristics of communication with the vehicle-mounted device using the first frequency band are deteriorated, and the determination result is transmitted to the portable device via the short-range communication means,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in the area in which the characteristics of the communication deteriorate, the transmission power is set to be higher than that in the area in which the characteristics of the communication deteriorate. This is a configuration in which an operation signal indicating an instruction from the user is enlarged and transmitted.

On the other hand, a control method for a keyless entry system according to the present invention includes a portable device carried by a user, and a vehicle-mounted device mounted in a vehicle that operates according to an instruction transmitted from the portable device in a first frequency band. A method of controlling a keyless entry system comprising:
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are saved, and when a predetermined operation is performed, the position information of the portable device is acquired, and the position information of the portable device, Based on the communication characteristic data and the position information of the vehicle, it is determined whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate, and the communication is performed. Is in a region in which the characteristics of the communication are deteriorated, the transmission power is set to be higher than that in a region in which the characteristics of the communication are deteriorated, and the operation signal indicating the instruction from the user is transmitted.

Alternatively, a portable device owned by the user, a portable terminal possessed by the user and capable of acquiring position information of its own device, and the portable device operates according to an instruction transmitted from the portable device in the first frequency band, A method for controlling a keyless entry system including a vehicle-mounted device mounted on a vehicle, comprising:
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are stored, and when a predetermined operation is performed, the mobile terminal is requested to acquire the position information via the short-range communication means. Along with transmitting the position information of the vehicle and the communication characteristic data to the mobile terminal,
The mobile terminal is
Whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate based on the position information of the own device, the communication characteristic data, and the position information of the vehicle. Determines whether or not, and transmits the determination result to the portable device via the short-range communication means,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in the area in which the characteristics of the communication deteriorate, the transmission power is set to be higher than that in the area in which the characteristics of the communication deteriorate. This is a method of enlarging and transmitting an operation signal indicating an instruction from the user.

Alternatively, a portable device owned by the user, a portable terminal possessed by the user and capable of acquiring position information of its own device, and the portable device operates according to an instruction transmitted from the portable device in the first frequency band, A method for controlling a keyless entry system including a vehicle-mounted device mounted on a vehicle, comprising:
The vehicle-mounted device is
When the vehicle is in the parked state, the positional information of the vehicle is acquired, and the positional information of the vehicle and communication characteristic data of the portable device and the vehicle-mounted device in the first frequency band, which are provided in advance, are stored in a near field. Transmitting to the mobile terminal via distance communication means,
The mobile terminal is
When the vehicle position information and the communication characteristic data are received from the vehicle-mounted device, the vehicle position information and the communication characteristic data are saved,
The portable device is
When a predetermined operation is performed, it is determined whether or not the portable device is within a region in which the characteristics of the communication with the vehicle-mounted device using the first frequency band deteriorate. Request to the mobile terminal via
The mobile terminal is
Upon receiving the determination request from the portable device, the position information of the own device is acquired, and based on the position information of the own device and the stored communication characteristic data and the position information of the vehicle, the portable device, It is determined whether or not the characteristics of communication with the vehicle-mounted device using the first frequency band are deteriorated, and the determination result is transmitted to the portable device via the short-range communication means,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in a region where the communication characteristic deteriorates, the transmission power is set to be higher than that outside the region where the communication characteristic deteriorates. This is a method of enlarging and transmitting an operation signal indicating an instruction from the user.

According to the present invention, stable communication is possible at all angles of the vehicle.

It is a schematic diagram which shows one structural example of the keyless entry system of 1st Embodiment. FIG. 2 is a block diagram showing a configuration example of a vehicle-mounted device and a navigation device shown in FIG. 1. FIG. 2 is a block diagram showing a configuration example of the portable device shown in FIG. 1. FIG. 3 is a block diagram showing a configuration example of a UHF transmission unit included in the portable device shown in FIG. It is a schematic diagram which shows an example of the communication characteristic of a keyless entry system. It is a flow chart which shows an example of a processing procedure of a keyless entry system of a 1st embodiment. It is a flow chart which shows an example of a processing procedure of a keyless entry system of a 1st embodiment. It is a schematic diagram which shows an example of the communication characteristic data of the vehicle-mounted machine shown in FIG. 3 is a graph showing an example of transmission power by the UHF transmission unit of the portable device shown in FIG. 2(c). It is a schematic diagram which shows an example of the determination process for determining whether a portable device is in a target area. It is a schematic diagram which shows an example of the determination process for determining whether a portable device is in a target area. It is a schematic diagram which shows an example of the determination process for determining whether a portable device is in a target area. It is a schematic diagram which shows an example of the determination process for determining whether a portable device is in a target area. It is a schematic diagram which shows an example of the determination process for determining whether a portable device is in a target area. It is a schematic diagram which shows an example of the determination process for determining whether a portable device is in a target area. It is a block diagram which shows one structural example of the keyless entry system of 2nd Embodiment. It is a flow chart which shows an example of the processing procedure of the keyless entry system of a 2nd embodiment. It is a block diagram which shows one structural example of the keyless entry system of 3rd Embodiment. It is a flow chart which shows an example of the processing procedure of the keyless entry system of a 3rd embodiment. It is a flow chart which shows an example of the processing procedure of the keyless entry system of a 3rd embodiment.

Next, the present invention will be described with reference to the drawings.
According to the present invention, stable communication is enabled in all directions of the vehicle by reviewing the processing of the entire keyless entry system including the vehicle-mounted device and the portable device owned by the user of the vehicle. Specifically, when the position information of the portable device and the position information of the vehicle owned by the user of the vehicle are acquired, and the portable device is operated at the angle of the vehicle where the communication characteristics deteriorate (the communication distance becomes short). , And temporarily increases the transmission power of the portable device to transmit a signal to the vehicle. In this way, by increasing the transmission power of the portable device at an angle of the vehicle in which the communication characteristics are deteriorated (communication distance becomes shorter) than usual, stable communication can be performed at all angles of the vehicle.

(First embodiment)
FIG. 1 is a block diagram showing a configuration example of a keyless entry system to which the control system of the present invention is applied.
As shown in FIG. 1, the keyless entry system includes a vehicle-mounted device 1 and a navigation device 2 mounted on a vehicle, and a portable device (electronic key, smart key, or the like) 3 owned by the owner of the vehicle.

The vehicle-mounted device 1 and the portable device 3 have a configuration capable of transmitting and receiving information to and from each other by wireless communication. A signal is transmitted from the mobile device 3 to the vehicle-mounted device 1 using radio waves in the UHF (Ultra-High Frequency) band (first frequency band), and the vehicle-mounted device 1 transmits to the mobile device 3 LF (Low Frequency). ) Signals are transmitted using radio waves in the band (second frequency band). The navigation device 2 can specify the current position of its own vehicle by receiving a GPS signal from a GPS (Global Positioning System) satellite 4, and the portable device 3 can also specify the current position of its own device by receiving the GPS signal. It is possible.

FIG. 2A is a block diagram showing a configuration example of the vehicle-mounted device and the navigation device shown in FIG. 2B is a block diagram showing a configuration example of the portable device shown in FIG. 1, and FIG. 2C is a configuration example of the UHF transmission unit included in the portable device shown in FIG. 2B. It is a block diagram shown.
As shown in FIG. 2A, the vehicle-mounted device 1 includes a control unit 11, a storage unit 12, an LF transmission unit 13, a UHF reception unit 14, and a LAN (Local Area Network) I/F (Interface) 15.

The LF transmitter 13 is a well-known wireless device that transmits a wireless signal to the portable device 3 by using an LF band radio wave. An antenna device for the LF band is connected to the LF transmitter 13, and the radio signal output from the LF transmitter 13 is radiated into space via the antenna device.
The UHF receiving unit 14 is a well-known wireless device that receives a wireless signal transmitted from the portable device 3 using radio waves in the UHF band. An antenna device for the UHF band is connected to the UHF receiving unit 14, and the UHF receiving unit 14 receives a radio signal via the antenna device.

The storage unit 12 stores in advance programs necessary for the operation of the control unit 11 and communication characteristic data of the vehicle-mounted device 1 described later. The control unit 11 executes processing in accordance with the program stored in the storage unit 12. This controls the operation of the vehicle-mounted device 1 as a whole. The control unit 11 is, for example, a CPU (Central Processing Unit) that executes processing according to a program, a memory that temporarily holds a processing result by the CPU, an information processing storage (microcomputer) including various logic circuits, and the like. realizable.
The LAN I/F 15 is a well-known communication interface for transmitting/receiving data to/from the navigation device 2 via the in-vehicle LAN 21.

A GPS receiver 22 and various sensors 23 are connected to the navigation device 2. The various sensors 23 include a geomagnetic sensor, a gyroscope for detecting the angular velocity of rotation of the vehicle, and the like. The GPS receiver 22 is a known GPS receiver that calculates the position (latitude/longitude) of its own device based on the GPS signal.

The navigation device 2 obtains the parking angle of the vehicle based on the position information calculated by the GPS receiver 22 and the detection results of the various sensors 23. The parking angle is an angle (azimuth) with respect to a reference azimuth, which indicates a direction in which the parked vehicle is facing. The navigation device 2 can be realized by an electronic device called a "car navigation system".

As shown in FIG. 2B, the portable device 3 includes a control unit 31, a storage unit 32, an LF reception unit 33, a UHF transmission unit 34, a GPS reception unit 35, and a switch input unit 36.
The LF receiving unit 33 is a known wireless device that receives a wireless signal transmitted from the vehicle-mounted device 1 using an LF band radio wave. An antenna device for the LF band is connected to the LF receiver 33, and the LF receiver 33 receives a radio signal via the antenna device.
The UHF transmitter 34 is a well-known wireless device that transmits a wireless signal to the vehicle-mounted device 1 by using radio waves in the UHF band. An antenna device for the UHF band is connected to the UHF transmitter 34, and the radio signal output from the UHF transmitter 34 is radiated into space via the antenna device.
The GPS receiving unit 35 is a known GPS receiver that calculates the position (latitude/longitude) of its own device based on GPS signals received from GPS satellites.

The storage unit 32 stores a program necessary for the operation of the control unit 31, position information (longitude/latitude/parking angle) of a parked vehicle transmitted from the vehicle-mounted device 1 described later, communication characteristic data of the vehicle-mounted device, and the like. Is stored.
The control unit 31 controls the overall operation of the portable device 3 by executing processing according to the program stored in the storage unit 32. The control unit 31 is, for example, a CPU (Central Processing Unit) that executes processing according to a program, a memory that temporarily holds a processing result by the CPU, an information processing storage (microcomputer) including various logic circuits, and the like. realizable.

The switch input section 36 is prepared as an instruction input key for the user to use the remote keyless entry function, and a plurality of switch input sections 36 are prepared corresponding to the functions. For example, when the portable device 3 has two switches A and B, a switch lock instruction is assigned to the switch A and a door unlock instruction is assigned to the switch B. When the user operates the switch input unit 36, a signal (operation signal) instructing to lock or unlock the door is transmitted from the portable device 3 to the vehicle-mounted device 1 according to the operation.

As shown in FIG. 2C, the UHF transmission unit 34 includes a power amplification unit 341, a power amplification unit control circuit 342, a modulation unit 343, and an I/F (Interface) 344.
The UHF transmission unit 34 is connected to the control unit 31 via the I/F 344, and receives from the control unit 31 a signal (operation signal) to be transmitted to the vehicle-mounted device 1 and a control signal for the power amplification unit control circuit 342.
The modulator 343 modulates the operation signal received from the controller 31 according to a predetermined modulation method, and outputs the modulated operation signal to the power amplifier 341.

The power amplification unit 341 is an amplification circuit that amplifies the operation signal modulated by the modulation unit 343 to a required power. The operation signal amplified by the power amplification unit 341 is output to the UHF band antenna device and radiated into space from the antenna device.
The power amplification unit control circuit 342 changes the power level of the operation signal output from the power amplification unit 341 by controlling the amplification factor of the power amplification unit 341 according to the instruction from the control unit 31.

Next, general operation of the keyless entry system shown in FIG. 1 will be described with reference to the drawings.
In the keyless entry system, for example, when a user operates the switch input unit 36 of the portable device 3 to instruct unlocking of the door, the control unit 31 detects the operation, and an operation signal instructing unlocking is sent. It is transmitted from the UHF transmitter 34.

When the UHF receiving unit 14 of the vehicle-mounted device 1 receives the operation signal transmitted from the portable device 3, the control unit 11 determines the instruction content indicated by the operation signal, and confirms that the door unlocking instruction is given. Then, unlock the vehicle door. During normal operation, the transmission power of the wireless signal transmitted from the UHF transmitter 34 of the portable device 3 is constant.

Generally, a user's door lock/unlock operation is often performed at a position away from the vehicle. Further, since the keyless entry system is operated from various angles with respect to the vehicle, the following performances (1) and (2) are required.
(1) Communication (operation) is possible even if the vehicle is a predetermined distance away.
(2) Communication (operation) is possible at all angles of the vehicle.

Here, an example of communication characteristics of the keyless entry system is shown in FIG.
A broken line E in FIG. 3 indicates how many meters from the vehicle the operation of the portable device 3 is possible (communication possible) at all angles of the vehicle. In FIG. 3, the forward direction of the vehicle is 0°.
Circle F in FIG. 3 indicates the specifications of the communication distance required for the keyless entry system, and if the portable device 3 can communicate with the vehicle-mounted device 1 outside the circle F, it must meet the required specifications. become. When the position of the portable device 3 that can communicate with the vehicle-mounted device 1 is inside the circle F, it means that the required specifications are not satisfied and the communication distance is short. In the example shown in FIG. 3, the shaded area G is an area (area in which the transmission power is increased) that does not satisfy the communication distance specification. Hereinafter, a region that does not meet the communication distance specifications (a region in which the transmission power is increased) is referred to as a “target area”.

Next, the operation of the keyless entry system according to the first embodiment will be described with reference to the drawings.
4 and 5 are flowcharts showing an example of the processing procedure of the keyless entry system according to the first embodiment.
FIG. 4 shows an example of preparatory processing in the keyless entry system before the user operates the portable device 3. Specifically, it is a processing example from the parking of the vehicle to the transmission of the positional information of the vehicle and the communication characteristic data of the vehicle-mounted device 1 to the portable device 3. FIG. 5 shows a processing example of the keyless entry system when the user operates the portable device 3.
The processing of the vehicle-mounted device 1 described below is executed by the control unit 11 of the vehicle-mounted device 1, and the processing of the portable device 3 is executed by the control unit 31 of the portable device 3.

As shown in FIG. 4, the vehicle-mounted device 1 first acquires information (parking determination information) used in the parking determination as to whether the vehicle is in the parked state (step S11), and determines whether the vehicle is in the parked state. It is determined (step S12). The parking determination is performed using one of the following conditions or a combination of a plurality of conditions.
-The engine switch was turned off.
・The vehicle has stopped.
・Shift operation has changed to parking.
・Parking brake is set.
・Vehicle door opened.
・The door of the vehicle opened (the user got out of the car) and the door closed.
・The door was closed and locked further.

When the vehicle-mounted device 1 determines in the process of step S12 that the vehicle is not in the parked state, the process of step S12 is repeated. On the other hand, when it is determined that the vehicle is parked, the vehicle-mounted device 1 requests the navigation device 2 for position information (longitude/latitude/parking angle) of the vehicle (step S13). The navigation device 2 notifies the vehicle-mounted device 1 of the position information (longitude/latitude/parking angle) of the vehicle in accordance with the request from the vehicle-mounted device 1.

The vehicle-mounted device 1 determines whether or not the position information (longitude/latitude/parking angle) of the own vehicle is received from the navigation device 2 (step S14). When the position information is received, the process proceeds to step S15. To do. When the position information (longitude/latitude/parking angle) of the vehicle is not received, the process of step S14 is repeated.

In step S15, the vehicle-mounted device 1 reads the communication characteristic data stored in advance in the storage unit 12. The communication characteristic data is, for example, in the communication characteristic of the vehicle-mounted device shown in FIG. 6, information (angle data) indicating an angular range of an area (target area) G that does not satisfy the communication distance specification, and a distance to the vehicle (distance data). ) Is information indicating. FIG. 6 shows an example of angle data. In the example shown in FIG. 6, assuming that the front direction of the vehicle is 0°, the start angle of the region G is A°, and the end angle is B°, the angle data is, for example, Data1: represented by A to B.

Next, the vehicle-mounted device 1 transmits the position information (longitude/latitude/parking angle) and communication characteristic data of the own vehicle acquired in steps S14 and S15 to the portable device 3 via the LF transmitter 13 (step S16).
When the portable device 3 receives the vehicle position information (longitude/latitude/parking angle) and the communication characteristic data from the vehicle-mounted device 1 by the LF receiving unit 33 (step S20), the received vehicle position information (longitude/latitude/latitude/latitude/latitude). The parking angle) and the communication characteristic data are written in the storage unit 32 of the portable device 3 (step S21), and the process ends.

When the vehicle position information (longitude/latitude/parking angle) and communication characteristic data are stored in the storage unit 32, the portable device 3 is operated by the user to perform a predetermined switch operation (door lock/unlock) as shown in FIG. It is determined whether or not there is an operation for instructing (step S30). When there is no predetermined switch operation by the user, the portable device 3 repeats the process of step S30.

When there is a predetermined switch operation by the user, the portable device 3 acquires the position information of its own device using the GPS receiving unit 35 (step S31), and the position information of the vehicle (longitude) stored in the storage unit 32. -Latitude/parking angle) and communication characteristic data are read (step S32).

Subsequently, the portable device 3 calculates the target area based on the position information of the device itself, the position information (longitude/latitude/parking angle) of the vehicle, and the communication characteristic data (step S33).
Further, the mobile device 3 determines whether or not the current position of the mobile device 3 is within the target area (step S34). Whether or not it is within the target area may be determined by using the determination process shown in FIGS. 8A to 8F described later. If the current position is outside the target area, the mobile device 3 proceeds to the process of step S36.
When the current position is within the target area, the portable device 3 is set by the power amplification unit control circuit 342 of the UHF transmission unit 34 to increase the amplification factor of the power amplification unit 341 to increase the transmission power (increased transmission power). After performing the setting (step S35), the process proceeds to step S36.

In step S36, the portable device 3 transmits the operation signal indicating the switch operation by the user confirmed in step S30 (a signal instructing unlocking or locking of the door) to the vehicle-mounted device 1 via the UHF transmission unit 34. To do.
After transmitting the operation signal, the portable device 3 returns the amplification factor of the transmission power of the power amplification unit 341 to the initial value (transmission power setting reset) (step S37), and then ends the process.

FIG. 7 is a graph showing an example of transmission power by the UHF transmission unit of the portable device shown in FIG.
As shown in FIG. 7, in the first embodiment, when the user operates the portable device 3, when the portable device 3 is in the target area, the transmission power of the operation signal is higher than that in the case where the portable device 3 is outside the target area. Is increased (increased transmission power). The transmission power does not have to be binary as shown in FIG. 7, and may be set to multiple values depending on the angle with respect to the vehicle.

When the vehicle-mounted device 1 receives an operation signal from the portable device 3 (step S40), the vehicle-mounted device 1 executes a process according to the received operation signal (step S41). That is, a control signal instructing to lock/unlock the door is transmitted to the drive system that locks or unlocks the door. As a result, all doors are unlocked or locked. Then, the vehicle-mounted device 1 ends the process.

Next, a determination process for determining whether or not the portable device 3 is the target area will be described with reference to FIGS.
As described above, the storage unit 32 of the portable device 3 stores the vehicle position information (longitude/latitude/parking angle) and communication characteristic data (angle data and distance data) received from the vehicle-mounted device 1. ..
Here, the longitude/latitude, which is the position information of the vehicle, is Pt(xt, yt) as shown in FIG. 8A, and the parking angle is Φt as shown in FIG. 8B. The parking angle Φt is, for example, an azimuth angle (absolute angle) when the north azimuth is 0°.

As shown in FIG. 8C, the communication characteristic data is angle data of the area G that does not satisfy the specification of the communication distance, and is represented by, for example, Data1:A to B.
The position information of the device itself calculated by the portable device 3 using the GPS receiving unit 35 is information indicating longitude/latitude, and is represented by Pn(xn, yn) as shown in FIG. 8A.

When the portable device 3 acquires the position information Pn(xn, yn) of the own device, the portable device 3 uses the position information (longitude/latitude: Pt(xt, yt)) of the vehicle read from the storage unit 32 to measure the distance to the vehicle. And the azimuth angle are calculated (FIG. 8(d)). Here, the azimuth is the direction of the portable device 3 with respect to the vehicle, for example, 0° when the portable device 3 is located in the true north with respect to the vehicle, 90° when it is located in the true east, and is located in the true south. When it is located at 180°, it is located at west of 270°. The distance between the obtained portable device 3 and the vehicle is d, and the azimuth is Φ. Since the azimuth angle Φ is calculated from the latitude and longitude of each of the portable device 3 and the vehicle, the parking angle of the vehicle is not taken into consideration. Therefore, the portable device 3 obtains the distance and the azimuth angle of the target area with respect to the vehicle.

The azimuth angle of the target area with respect to the vehicle is A+Φt to B+Φt obtained by adding the parking angle Φt to the angle data A to B obtained as the communication characteristic data (FIG. 8E). This means that the azimuth angle Φ between the portable device 3 and the vehicle described above is an absolute angle with the north being 0°, and the angle data A to B obtained as the communication characteristic data is 0° in front of the vehicle. This is because it is a relative angle at the time of doing so, and in order to compare the two, it is necessary to add the parking angle to the angle data A to B to convert it to an absolute angle in which north is 0°.

On the other hand, as shown in FIG. 8E, the distance data of the target area with respect to the vehicle defines, for example, a point where the vehicle and the portable device 3 are separated by a [m] or more as the target area. This set value may be saved in the storage unit 32 of the portable device 3 in advance, or may be saved as a part of the communication characteristic data in the vehicle-mounted device 1 so that another value can be transferred from the vehicle-mounted device 1 to the portable device 3. It may be transmitted together with the communication characteristic data (angle data).

In the above description, only the minimum distance a[m], which is the closest point to the vehicle, is defined as the target area. However, as shown in FIG. m] may also be defined together. In this way, if the maximum distance b[m] is defined as the target area and the transmission power is set in the area farther than the maximum distance b[m] as in the normal operation, the transmission power is unnecessarily increased. Since the processing to be performed can be avoided, an increase in power consumption of the portable device 3 can be suppressed.

The determination formulas for the distance d and the azimuth angle Φ between the portable device 3 and the vehicle are as follows, and when the determination formulas are met, the portable device 3 is within the target area (region H in FIG. 8E). To determine.
Azimuth: A+Φt≦Φ≦B+Φt
Distance: a≦d≦b

According to the first embodiment, in the target area that does not satisfy the communication distance specification, the portable device 3 transmits the operation signal with the transmission power higher than usual, so that the vehicle-mounted device 1 is The operation signal transmitted from can be received with sufficient strength. Therefore, as shown in FIG. 8F, the specifications of the keyless entry system can be satisfied, and stable communication can be performed at all angles of the vehicle.

Further, by temporarily increasing the transmission power, it is possible to suppress an increase in the power consumption of the portable device 3 as compared with the case where the transmission power is constantly increased. Usually, the portable device 3 is operated by a small battery (coin battery, button battery, etc.), and it is not preferable to waste power consumption. According to this embodiment, it is possible to perform stable communication at all angles of the vehicle and avoid unnecessary power consumption of the portable device 3.

(Second embodiment)
FIG. 9 is a block diagram showing a configuration example of the keyless entry system according to the second embodiment.
The keyless entry system of the second embodiment has a configuration in which a mobile terminal 6 owned by the owner of the vehicle is added to the keyless entry system of the first embodiment shown in FIG.

As shown in FIG. 9, the portable device 5 of the second embodiment is a short-range communication unit instead of the GPS receiving unit 35 included in the portable device 3 of the first embodiment shown in FIG. 2B. This is a configuration including (short-range communication means) 51. As the short-range communication unit 51, for example, a communication device conforming to the well-known Bluetooth (registered trademark) standard may be used. The other configuration of the mobile device 5 is the same as that of the mobile device 3 of the first embodiment shown in FIG. 2B, and the description thereof will be omitted.

As illustrated in FIG. 9, the mobile terminal 6 includes a control unit 61, a storage unit 62, an LTE/3G transmission/reception unit 63, a GPS reception unit 64, a short-range communication unit 65, an operation unit 66, a call unit 67, and an image display unit 68. Equipped with. The mobile terminal 6 can be realized by a mobile phone called a so-called smartphone. The mobile terminal 6 is not limited to the configuration shown in FIG. 9, and may be any other mobile device (tablet type computer or tablet type computer as long as it has the functions of the GPS receiving unit 64 and the short-range communication unit 65). It can also be realized with game machines).

The LTE/3G transmission/reception unit 63 is a communication device for communicating according to well-known communication standards such as LTE (Long Term Evolution) and 3G (3rd Generation).
The GPS receiving unit 64 is a well-known GPS receiver that calculates the position (latitude/longitude) of its own device based on GPS signals received from GPS satellites.
The short-range communication unit 65 is a communication device for transmitting/receiving information to/from the portable device 5. The short-range communication unit 65 is, for example, a communication device that conforms to the well-known Bluetooth (registered trademark) standard.

The operation unit 66 is a user interface for the user to input instructions and information to the mobile terminal 6, and is configured with buttons, a touch panel, and the like.
The call unit 67 is a device for a user to talk using the mobile terminal 6 via the mobile communication network.
The image display unit 68 is a display unit that displays an image according to a user's instruction.

The storage unit 62 stores programs necessary for the operation of the control unit 61, user personal data, and the like.
The control unit 61 controls the overall operation of the mobile terminal 6 by executing processing according to the program stored in the storage unit 62. The control unit 61 is, for example, a CPU (Central Processing Unit) that executes processing according to a program, a memory that temporarily holds a processing result by the CPU, an information processing storage (microcomputer) including various logic circuits, and the like. realizable.

The keyless entry system according to the second embodiment has a configuration in which the portable device 5 acquires the position information of its own device by using the GPS receiving unit 64 included in the portable terminal 6 owned by the user. However, since the portable device 5 usually does not have a communication means with the portable terminal 6, the short-range communication unit 51 is mounted on the portable device 5 to enable communication with the portable terminal 6.

Most mobile terminals (mobile phones, etc.) 6 in recent years include a GPS receiver and a communication device that conforms to the Bluetooth (registered trademark) standard. Therefore, the Bluetooth (registered trademark) as the short-range communication unit 51 is provided in the portable device 5. ) If a communication device conforming to the standard is provided, communication with the mobile terminal 6 becomes possible.

FIG. 10 is a flowchart showing an example of the processing procedure of the keyless entry system according to the second embodiment. FIG. 10 shows a processing example of the keyless entry system when the user operates the portable device 5. The preparation process in the keyless entry system before the user operates the portable device 5 is the same as that in the first embodiment shown in FIG. The processing of the vehicle-mounted device 1 shown below is executed by the control unit 11 of the vehicle-mounted device 1, the processing of the portable device 5 is executed by the control unit 31 of the portable device 5, and the processing of the mobile terminal 6 is It is assumed that this is executed by the control unit 61 of the mobile terminal 6.

As shown in FIG. 10, the portable device 5 determines whether or not there is a predetermined switch operation (operation for instructing lock/unlock of the door) by the user (step S53), and there is no predetermined switch operation by the user. In this case, the process of step S53 is repeated. When the user performs a predetermined switch operation, the portable device 5 requests (requests) the portable terminal 6 to transmit the positional information (step S54), and the vehicle positional information (longitude/latitude) stored in the storage unit 32 is stored. -Parking angle) and communication characteristic data are read (step S55).

The mobile terminal 6 determines whether there is a position information request from the mobile device 5 (step S50), and when there is no position information request, repeats the process of step S50.
When there is a position information request from the mobile device 5, the mobile terminal 6 acquires the position information of its own device by using the GPS receiving unit 64 (step S51), and outputs the position information to the short-range communication unit 65 (Bluetooth (registered trademark)). Etc.) to the portable device 5 (step S52).

The mobile device 5 determines whether or not the position information is received from the mobile terminal 6 (step S56), and when the position information is not received, the process of step S56 is repeated.
When the position information is received from the mobile terminal 6, the mobile device 5 specifies the communication distance based on the position information received from the mobile terminal 6, the position information (longitude/latitude/parking angle) of the vehicle, and the communication characteristic data. The target area that does not satisfy is satisfied is calculated (step S57).

Furthermore, the mobile device 5 considers the position information received from the mobile terminal 6 as the position of the own device and determines whether the current position of the own device is within the target area (step S58). If the current position is outside the target area, the portable device 5 moves to the process of step S50.
When the current position is within the target area, the portable device 5 is set by the power amplification unit control circuit 342 of the UHF transmission unit 34 to increase the amplification factor of the power amplification unit 341 to increase the transmission power (increased transmission power). After performing the setting (step S59), the process proceeds to step S60.

In step S60, the portable device 5 transmits an operation signal (a signal instructing unlocking or locking of the door) indicating the user's switch operation confirmed in step S53 to the vehicle-mounted device.
When the operation signal indicating the switch operation is transmitted, the portable device 5 returns the amplification factor of the transmission power of the power amplification unit 341 of the UHF transmission unit 34 to the initial value (transmission power setting reset) (step S61), and then the processing ends. To do.

When the vehicle-mounted device 1 receives the operation signal from the portable device 5 (step S62), the vehicle-mounted device 1 transmits a control signal for instructing to lock/unlock the door to the drive system that locks or unlocks the door based on the received operation signal. Yes (step S63). As a result, all doors are unlocked or locked. Then, the vehicle-mounted device 1 ends the process.

Generally, a GPS receiver needs about several minutes at the earliest until the positioning is started and the current position is fixed after the power is turned on. On the other hand, in order to prevent the user's feeling of operation of the portable device 5 (reaction time, etc.) from being impaired, the portable device 5 performs a series of processes from the switch operation by the user to the transmission of the operation signal to the vehicle-mounted device. For example, it is desirable to finish the process within about 1 second. That is, in order not to impair the feeling of operation (reaction time etc.) of the portable device 5 by the user, the GPS receiving section 35 of the portable device 5 needs to be constantly operated.

However, if the GPS receiving unit 35 of the portable device 5 is always operated, the power consumption of the portable device 5 will increase. As described above, since the portable device 5 normally operates with a small battery (coin battery, button battery, etc.), it is desirable to suppress power consumption as much as possible.

According to the keyless entry system of the second embodiment, since the position information measured by the GPS receiving unit 64 included in the mobile terminal 6 is used as the position information of the mobile device 5, the mobile device 5 includes the GPS receiving unit 35. No need. Therefore, the power consumption of the portable device 5 can be reduced as compared with the keyless entry system according to the first embodiment.

The portable device 5 according to the second embodiment needs to include a short-range communication unit (Bluetooth (registered trademark)) 51 in place of the GPS receiving unit 35. However, the short-range communication unit 51 is a mobile terminal. It is sufficient to operate only when the position information is acquired from 6, and it is not always necessary to operate. Therefore, the increase in power consumption is small.

Further, in the keyless entry system of the second embodiment, since the portable device 5 and the portable terminal 6 can communicate with each other by the short-range communication unit (Bluetooth (registered trademark) or the like), It is also possible to transmit the received vehicle position information (longitude/latitude/parking angle) and communication characteristic data to the mobile terminal 6.
In that case, the mobile terminal 6 calculates a target area that does not satisfy the communication distance specification, determines whether the mobile terminal 6 and the mobile device 5 are within the target area, and sends the determination result to the mobile device 5. You can send it back. If these processes are executed by the mobile terminal 6, the power consumption of the mobile device 5 can be further reduced.

(Third Embodiment)
FIG. 11 is a block diagram showing a configuration example of the keyless entry system according to the third embodiment.
As shown in FIG. 11, the keyless entry system of the third embodiment is the same as the keyless entry system of the second embodiment shown in FIG. ..
Although FIG. 11 shows a configuration example in which the short-range communication unit 71 is connected to the navigation device 2, the short-range communication unit 71 may be connected to the vehicle-mounted device 1.
In recent years, there are navigation devices equipped with a communication device that conforms to the Bluetooth (registered trademark) standard. In that case, the Bluetooth (registered trademark) function built in the navigation device may be used as the short-range communication unit 71. ..

Other configurations of the vehicle-mounted device 1 and the navigation device 2 are the same as those of the vehicle-mounted device 1 and the navigation device 2 according to the first embodiment shown in FIG. 2A, and therefore description thereof will be omitted. Further, the configurations of the portable device 5 and the portable terminal 6 are the same as those of the second embodiment shown in FIG.

12 and 13 are flowcharts showing an example of the processing procedure of the keyless entry system according to the third embodiment.
FIG. 12 shows a processing example of advance preparation in the keyless entry system before the user operates the portable device 5. Specifically, it is a processing example from the parking of the vehicle to the transmission of the positional information of the vehicle and the communication characteristic data of the vehicle-mounted device 1 to the mobile terminal 6. FIG. 13 shows a processing example of the keyless entry system when the user operates the portable device 5.
The processing of the vehicle-mounted device 1 shown below is executed by the control unit 11 of the vehicle-mounted device 1, the processing of the portable device 5 is executed by the control unit 31 of the portable device 5, and the processing of the mobile terminal 6 is It is assumed that this is executed by the control unit 61 of the mobile terminal 6.

As shown in FIG. 12, the vehicle-mounted device 1 first acquires information (parking determination information) used for parking determination as to whether or not the vehicle is in the parked state (step S71), and determines whether or not the vehicle is in the parked state. It is determined (step S72).

When the vehicle mounting apparatus 1 determines in the process of step S72 that the vehicle is not in the parked state, the process of step S72 is repeated. On the other hand, when it is determined that the vehicle is parked, the vehicle-mounted device 1 requests the navigation device 2 for position information (longitude/latitude/parking angle) of the vehicle itself (step S73). The navigation device 2 notifies the vehicle-mounted device 1 of the position information (longitude/latitude/parking angle) of the vehicle in accordance with the request from the vehicle-mounted device 1.

The vehicle-mounted device 1 determines whether or not the position information (longitude/latitude/parking angle) of the own vehicle is received from the navigation device 2 (step S74). When the position information is received, the process proceeds to step S75. To do. When the position information (longitude/latitude/parking angle) of the vehicle is not received, the process of step S74 is repeated. In step S75, the vehicle-mounted device 1 reads the communication characteristic data stored in advance in the storage unit 12.

Next, the vehicle-mounted device 1 transmits the position information (longitude/latitude/parking angle) and communication characteristic data of the own vehicle acquired in steps S74 and S75 via the short-range communication unit (Bluetooth (registered trademark)) 71. And transmits it to the mobile terminal 6 (step S76).

When the mobile terminal 6 receives the vehicle position information (longitude/latitude/parking angle) and communication characteristic data from the vehicle-mounted device 1 via the short-range communication unit (Bluetooth (registered trademark) or the like) 65 (step S77), The received vehicle position information (longitude/latitude/parking angle) and communication characteristic data are written in the storage unit 62 of the mobile terminal 6 (step S78), and the process ends.

As shown in FIG. 13, the portable device 5 determines whether or not there is a predetermined switch operation (operation for instructing lock/unlock of the door) by the user (step S85), and there is no predetermined switch operation by the user. In this case, the process of step S85 is repeated. When there is a predetermined switch operation by the user, the mobile device 5 requests the mobile terminal 6 to determine whether or not it is within the target area (step S86).

The mobile terminal 6 determines whether or not there is a determination request by the mobile device 5 whether or not it is within the target area (step S80), and when there is no determination request, repeats the processing of step S80.
When there is a determination request by the mobile device 5, the mobile terminal 6 acquires the position information of its own device using the GPS reception unit 64 (step S81), and the position information of the vehicle (longitude/latitude/parking angle) from the storage unit 62. And communication characteristic data are read (step S82).

Next, the mobile terminal 6 calculates a target area that does not meet the communication distance specification, based on the position information of the device itself, the position information (longitude/latitude/parking angle) of the vehicle, and the communication characteristic data, It is determined whether or not the current position of the own device is within the target area (step S83). Then, the mobile terminal 6 transmits the determination result to the mobile device 5 via the short-range communication unit 65 (step S84).

The mobile device 5 determines whether or not the determination result is received from the mobile terminal 6 (step S87), and when the determination result is not received, the process of step S87 is repeated.
When the determination result is received from the mobile terminal 6, the mobile device 5 determines from the determination result received from the mobile terminal 6 whether or not the current position of the own device is within the target area that does not satisfy the communication distance specification ( (Step S88), if the current position is outside the target area, the process proceeds to step S90.
If the current position is within the target area, the portable device 5 performs setting for increasing the amplification factor of the power amplification unit of the UHF transmission unit to increase the transmission power (step S89), and then proceeds to the process of step S90. Transition.

In step S90, the portable device 5 transmits an operation signal indicating the user's switch operation confirmed in step S85 (a signal instructing unlocking or locking of the door) to the vehicle-mounted device.
When the operation signal indicating the switch operation is transmitted, the portable device 5 returns the amplification factor of the transmission power of the power amplification unit of the UHF transmission unit to the initial value (step S91) and ends the process.

When the vehicle-mounted device 1 receives the operation signal from the portable device 5 (step S92), the vehicle-mounted device 1 executes a process according to the received operation signal (step S93). That is, a control signal instructing to lock/unlock the door is transmitted to the drive system that locks or unlocks the door. As a result, all doors are unlocked or locked. Then, the vehicle-mounted device 1 ends the process.

According to the third embodiment, vehicle position information (longitude/latitude/parking angle) and communication characteristic data are directly transmitted from the vehicle-mounted device 1 to the mobile terminal 6 via the short-range communication unit 71. Therefore, the portable device 5 of the present embodiment does not need to receive the vehicle position information (longitude/latitude/parking angle) and communication characteristic data from the vehicle-mounted device 1 by the LF receiving unit. Therefore, the power consumption of the portable device 5 can be reduced as compared with the keyless entry system of the second embodiment.

1 Vehicle Mounted Device 2 Navigation Device 3, 5 Portable Device 4 GPS Satellite 6 Portable Terminal 11, 31, 61 Control Unit 12, 32, 62 Storage Unit 13 LF Transmission Unit 14 UHF Reception Unit 15 LANI/F
21 LAN in the car
22, 35 GPS receiving unit 23 Various sensors 33 LF receiving unit 34 UHF transmitting unit 36 Switch input unit 51, 65, 71 Short-range communication unit 63 LTE/3G transmitting/receiving unit 64 GPS receiving unit 66 Operation unit 67 Call unit 68 Image display unit 341 Power amplification unit 342 Power amplification unit control circuit 343 Modulation unit 344 I/F

Claims (10)

A keyless entry system comprising: a mobile device carried by a user; and a vehicle-mounted device mounted in a vehicle, which operates according to an instruction transmitted from the mobile device in a first frequency band,
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are saved, and when a predetermined operation is performed, the position information of the portable device is acquired, and the position information of the portable device, Based on the communication characteristic data and the position information of the vehicle, it is determined whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate, and the communication is performed. The keyless entry system for transmitting an operation signal indicating an instruction from the user when the power is higher than that outside the area where the communication characteristics deteriorate, when the area is in the area where the characteristics deteriorate. The user further has a portable terminal capable of acquiring position information of the own device,
The portable device is
When the predetermined operation is performed, the mobile terminal is requested to acquire position information via the short-range communication means,
The mobile terminal is
According to a request from the portable device, the position information of the own device is transmitted to the portable device via the short-range communication means,
The portable device is
Considering the position information received from the mobile terminal as the position information of the mobile device, the mobile device is within an area where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate. The keyless entry system according to claim 1, wherein it is determined whether or not the keyless entry system is present. A portable device carried by a user, a portable terminal carried by the user and capable of acquiring position information of its own device, and a vehicle operating according to an instruction transmitted from the portable device in a first frequency band. A keyless entry system including a vehicle-mounted device mounted,
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are stored, and when a predetermined operation is performed, the mobile terminal is requested to acquire the position information via the short-range communication means. Along with transmitting the position information of the vehicle and the communication characteristic data to the mobile terminal,
The mobile terminal is
Whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate based on the position information of the own device, the communication characteristic data, and the position information of the vehicle. Determines whether or not, and transmits the determination result to the portable device via the short-range communication means,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in the area in which the characteristics of the communication deteriorate, the transmission power is set to be higher than that in the area in which the characteristics of the communication deteriorate. A keyless entry system that transmits an operation signal that is enlarged and that indicates an instruction from the user. A portable device carried by a user, a portable terminal carried by the user and capable of acquiring position information of its own device, and a vehicle operating according to an instruction transmitted from the portable device in a first frequency band. A keyless entry system including a vehicle-mounted device mounted,
The vehicle-mounted device is
When the vehicle is in the parked state, the positional information of the vehicle is acquired, and the positional information of the vehicle and communication characteristic data of the portable device and the vehicle-mounted device in the first frequency band, which are provided in advance, are stored in a near field. Transmitting to the mobile terminal via distance communication means,
The mobile terminal is
When the vehicle position information and the communication characteristic data are received from the vehicle-mounted device, the vehicle position information and the communication characteristic data are saved,
The portable device is
When a predetermined operation is performed, the portable device, the first is determined whether or not communication characteristics of the vehicle device which uses a frequency band is within the region to deteriorate, the short-range communication means Request to the mobile terminal via
The mobile terminal is
Upon receiving the determination request from the portable device, the position information of the own device is acquired, and based on the position information of the own device and the stored communication characteristic data and the position information of the vehicle, the portable device, determines whether there in an area characteristic of the communication between the vehicle device using the first frequency band is deteriorated, through the short-range communication means transmits the determination result to the portable device ,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in the area in which the characteristics of the communication deteriorate, the transmission power is set to be higher than that in the area in which the characteristics of the communication deteriorate. A keyless entry system that transmits an operation signal that is enlarged and that indicates an instruction from the user. The position information of the vehicle is
Latitude, longitude of the vehicle, and a parking angle that is an angle with respect to a reference azimuth indicating a direction in which the vehicle is facing,
The communication characteristic data is
5. The keyless entry system according to claim 1, wherein the keyless entry system is angle data indicating an angle range with respect to the vehicle and distance data indicating a distance to the vehicle, the angle data indicating an area in which the communication characteristics deteriorate. A control method for a keyless entry system, comprising: a portable device carried by a user; and a vehicle-mounted device mounted in a vehicle, which operates according to an instruction transmitted from the portable device in a first frequency band,
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are saved, and when a predetermined operation is performed, the position information of the portable device is acquired, and the position information of the portable device, Based on the communication characteristic data and the position information of the vehicle, it is determined whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate, and the communication is performed. The method for controlling a keyless entry system, wherein when in an area where the characteristics of No. 1 deteriorate, transmission power is made higher than that outside the area where the characteristics of communication deteriorates and an operation signal indicating an instruction from the user is transmitted. The keyless entry system
Further comprising a mobile terminal possessed by the user and capable of acquiring position information of its own device,
The portable device is
When the predetermined operation is performed, the mobile terminal is requested to acquire position information via the short-range communication means,
The mobile terminal is
According to a request from the portable device, the position information of the own device is transmitted to the portable device via the short-range communication means,
The portable device is
Considering the position information received from the mobile terminal as the position information of the mobile device, the mobile device is within an area where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate. The control method of the keyless entry system according to claim 6, wherein it is determined whether or not there is. A portable device carried by a user, a portable terminal carried by the user and capable of acquiring position information of its own device, and a vehicle operating according to an instruction transmitted from the portable device in a first frequency band. A method for controlling a keyless entry system including a vehicle-mounted device mounted,
The vehicle-mounted device is
When the vehicle is parked, the positional information of the vehicle is acquired, and the positional information of the vehicle and the communication characteristic data of the portable device and the vehicle-mounted device according to the first frequency band, which are provided in advance, are used as second data. Transmitted to the portable device in the frequency band of
The portable device is
The position information of the vehicle and the communication characteristic data transmitted from the vehicle-mounted device are stored, and when a predetermined operation is performed, the mobile terminal is requested to acquire the position information via the short-range communication means. Along with transmitting the position information of the vehicle and the communication characteristic data to the mobile terminal,
The mobile terminal is
Whether or not the portable device is in a region where the characteristics of communication with the vehicle-mounted device using the first frequency band deteriorate based on the position information of the own device, the communication characteristic data, and the position information of the vehicle. Determines whether or not, and transmits the determination result to the portable device via the short-range communication means,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in the area in which the characteristics of the communication deteriorate, the transmission power is set to be higher than that in the area in which the characteristics of the communication deteriorate. A control method for a keyless entry system, which is enlarged and transmits an operation signal indicating an instruction from the user. A portable device carried by a user, a portable terminal carried by the user and capable of acquiring position information of its own device, and a vehicle operating according to an instruction transmitted from the portable device in a first frequency band. A method for controlling a keyless entry system including a vehicle-mounted device mounted,
The vehicle-mounted device is
When the vehicle is in the parked state, the positional information of the vehicle is acquired, and the positional information of the vehicle and communication characteristic data of the portable device and the vehicle-mounted device in the first frequency band, which are provided in advance, are stored in a near field. Transmitting to the mobile terminal via distance communication means,
The mobile terminal is
When the vehicle position information and the communication characteristic data are received from the vehicle-mounted device, the vehicle position information and the communication characteristic data are saved,
The portable device is
When a predetermined operation is performed, the portable device, the first is determined whether or not communication characteristics of the vehicle device which uses a frequency band is within the region to deteriorate, the short-range communication means Request to the mobile terminal via
The mobile terminal is
Upon receiving the determination request from the portable device, the position information of the own device is acquired, and based on the position information of the own device and the stored communication characteristic data and the position information of the vehicle, the portable device, determines whether there in an area characteristic of the communication between the vehicle device using the first frequency band is deteriorated, through the short-range communication means transmits the determination result to the portable device ,
The portable device is
From the determination result of the mobile terminal, when the communication characteristic with the vehicle-mounted device using the first frequency band is in the area in which the characteristics of the communication deteriorate, the transmission power is set to be higher than that in the area in which the characteristics of the communication deteriorate. A control method for a keyless entry system, which is enlarged and transmits an operation signal indicating an instruction from the user. The position information of the vehicle is
Latitude, longitude of the vehicle, and a parking angle that is an angle with respect to a reference azimuth indicating a direction in which the vehicle is facing,
The communication characteristic data is
The control of the keyless entry system according to any one of claims 6 to 9, which is angle data indicating an angle range with respect to the vehicle and distance data indicating a distance to the vehicle, which indicates an area in which the characteristics of the communication deteriorate. Method.

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